1 /* ADI Blackfin BFD support for 32-bit ELF.
2    Copyright 2005, 2006 Free Software Foundation, Inc.
3 
4    This file is part of BFD, the Binary File Descriptor library.
5 
6    This program is free software; you can redistribute it and/or modify
7    it under the terms of the GNU General Public License as published by
8    the Free Software Foundation; either version 2 of the License, or
9    (at your option) any later version.
10 
11    This program is distributed in the hope that it will be useful,
12    but WITHOUT ANY WARRANTY; without even the implied warranty of
13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14    GNU General Public License for more details.
15 
16    You should have received a copy of the GNU General Public License
17    along with this program; if not, write to the Free Software
18    Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301,
19    USA.  */
20 
21 #include "bfd.h"
22 #include "sysdep.h"
23 #include "libbfd.h"
24 #include "elf-bfd.h"
25 #include "elf/bfin.h"
26 #include "elf/dwarf2.h"
27 #include "hashtab.h"
28 
29 /* FUNCTION : bfin_pltpc_reloc
30    ABSTRACT : TODO : figure out how to handle pltpc relocs.  */
31 static bfd_reloc_status_type
bfin_pltpc_reloc(bfd * abfd ATTRIBUTE_UNUSED,arelent * reloc_entry ATTRIBUTE_UNUSED,asymbol * symbol ATTRIBUTE_UNUSED,PTR data ATTRIBUTE_UNUSED,asection * input_section ATTRIBUTE_UNUSED,bfd * output_bfd ATTRIBUTE_UNUSED,char ** error_message ATTRIBUTE_UNUSED)32 bfin_pltpc_reloc (
33      bfd *abfd ATTRIBUTE_UNUSED,
34      arelent *reloc_entry ATTRIBUTE_UNUSED,
35      asymbol *symbol ATTRIBUTE_UNUSED,
36      PTR data ATTRIBUTE_UNUSED,
37      asection *input_section ATTRIBUTE_UNUSED,
38      bfd *output_bfd ATTRIBUTE_UNUSED,
39      char **error_message ATTRIBUTE_UNUSED)
40 {
41   bfd_reloc_status_type flag = bfd_reloc_ok;
42   return flag;
43 }
44 
45 
46 static bfd_reloc_status_type
bfin_pcrel24_reloc(bfd * abfd,arelent * reloc_entry,asymbol * symbol,PTR data,asection * input_section,bfd * output_bfd,char ** error_message ATTRIBUTE_UNUSED)47 bfin_pcrel24_reloc (bfd *abfd,
48                     arelent *reloc_entry,
49                     asymbol *symbol,
50                     PTR data,
51                     asection *input_section,
52                     bfd *output_bfd,
53                     char **error_message ATTRIBUTE_UNUSED)
54 {
55   bfd_vma relocation;
56   bfd_size_type addr = reloc_entry->address;
57   bfd_vma output_base = 0;
58   reloc_howto_type *howto = reloc_entry->howto;
59   asection *output_section;
60   bfd_boolean relocatable = (output_bfd != NULL);
61 
62   if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
63     return bfd_reloc_outofrange;
64 
65   if (bfd_is_und_section (symbol->section)
66       && (symbol->flags & BSF_WEAK) == 0
67       && !relocatable)
68     return bfd_reloc_undefined;
69 
70   if (bfd_is_com_section (symbol->section))
71     relocation = 0;
72   else
73     relocation = symbol->value;
74 
75   output_section = symbol->section->output_section;
76 
77   if (relocatable)
78     output_base = 0;
79   else
80     output_base = output_section->vma;
81 
82   if (!relocatable || !strcmp (symbol->name, symbol->section->name))
83     relocation += output_base + symbol->section->output_offset;
84 
85   if (!relocatable && !strcmp (symbol->name, symbol->section->name))
86     relocation += reloc_entry->addend;
87 
88   relocation -= input_section->output_section->vma + input_section->output_offset;
89   relocation -= reloc_entry->address;
90 
91   if (howto->complain_on_overflow != complain_overflow_dont)
92     {
93       bfd_reloc_status_type status;
94       status = bfd_check_overflow (howto->complain_on_overflow,
95 				   howto->bitsize,
96 				   howto->rightshift,
97 				   bfd_arch_bits_per_address(abfd),
98 				   relocation);
99       if (status != bfd_reloc_ok)
100 	return status;
101     }
102 
103   /* if rightshift is 1 and the number odd, return error.  */
104   if (howto->rightshift && (relocation & 0x01))
105     {
106       fprintf(stderr, "relocation should be even number\n");
107       return bfd_reloc_overflow;
108     }
109 
110   relocation >>= (bfd_vma) howto->rightshift;
111   /* Shift everything up to where it's going to be used.  */
112 
113   relocation <<= (bfd_vma) howto->bitpos;
114 
115   if (relocatable)
116     {
117       reloc_entry->address += input_section->output_offset;
118       reloc_entry->addend += symbol->section->output_offset;
119     }
120 
121   {
122     short x;
123 
124     /* We are getting reloc_entry->address 2 byte off from
125        the start of instruction. Assuming absolute postion
126        of the reloc data. But, following code had been written assuming
127        reloc address is starting at begining of instruction.
128        To compensate that I have increased the value of
129        relocation by 1 (effectively 2) and used the addr -2 instead of addr.  */
130 
131     relocation += 1;
132     x = bfd_get_16 (abfd, (bfd_byte *) data + addr - 2);
133     x = (x & 0xff00) | ((relocation >> 16) & 0xff);
134     bfd_put_16 (abfd, x, (unsigned char *) data + addr - 2);
135 
136     x = bfd_get_16 (abfd, (bfd_byte *) data + addr);
137     x = relocation & 0xFFFF;
138     bfd_put_16 (abfd, x, (unsigned char *) data + addr );
139   }
140   return bfd_reloc_ok;
141 }
142 
143 static bfd_reloc_status_type
bfin_imm16_reloc(bfd * abfd,arelent * reloc_entry,asymbol * symbol,PTR data,asection * input_section,bfd * output_bfd,char ** error_message ATTRIBUTE_UNUSED)144 bfin_imm16_reloc (bfd *abfd,
145      		  arelent *reloc_entry,
146      		  asymbol *symbol,
147      		  PTR data,
148      		  asection *input_section,
149      		  bfd *output_bfd,
150      		  char **error_message ATTRIBUTE_UNUSED)
151 {
152   bfd_vma relocation, x;
153   bfd_size_type reloc_addr = reloc_entry->address;
154   bfd_vma output_base = 0;
155   reloc_howto_type *howto = reloc_entry->howto;
156   asection *output_section;
157   bfd_boolean relocatable = (output_bfd != NULL);
158 
159   /* Is the address of the relocation really within the section?  */
160   if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
161     return bfd_reloc_outofrange;
162 
163   if (bfd_is_und_section (symbol->section)
164       && (symbol->flags & BSF_WEAK) == 0
165       && !relocatable)
166     return bfd_reloc_undefined;
167 
168   output_section = symbol->section->output_section;
169   relocation = symbol->value;
170 
171   /* Convert input-section-relative symbol value to absolute.  */
172   if (relocatable)
173     output_base = 0;
174   else
175     output_base = output_section->vma;
176 
177   if (!relocatable || !strcmp (symbol->name, symbol->section->name))
178     relocation += output_base + symbol->section->output_offset;
179 
180   /* Add in supplied addend.  */
181   relocation += reloc_entry->addend;
182 
183   if (relocatable)
184     {
185       reloc_entry->address += input_section->output_offset;
186       reloc_entry->addend += symbol->section->output_offset;
187     }
188   else
189     {
190       reloc_entry->addend = 0;
191     }
192 
193   if (howto->complain_on_overflow != complain_overflow_dont)
194     {
195       bfd_reloc_status_type flag;
196       flag = bfd_check_overflow (howto->complain_on_overflow,
197 				 howto->bitsize,
198 				 howto->rightshift,
199 				 bfd_arch_bits_per_address(abfd),
200 				 relocation);
201       if (flag != bfd_reloc_ok)
202 	return flag;
203     }
204 
205   /* Here the variable relocation holds the final address of the
206      symbol we are relocating against, plus any addend.  */
207 
208   relocation >>= (bfd_vma) howto->rightshift;
209   x = relocation;
210   bfd_put_16 (abfd, x, (unsigned char *) data + reloc_addr);
211   return bfd_reloc_ok;
212 }
213 
214 
215 static bfd_reloc_status_type
bfin_byte4_reloc(bfd * abfd,arelent * reloc_entry,asymbol * symbol,PTR data,asection * input_section,bfd * output_bfd,char ** error_message ATTRIBUTE_UNUSED)216 bfin_byte4_reloc (bfd *abfd,
217                   arelent *reloc_entry,
218                   asymbol *symbol,
219                   PTR data,
220                   asection *input_section,
221                   bfd *output_bfd,
222                   char **error_message ATTRIBUTE_UNUSED)
223 {
224   bfd_vma relocation, x;
225   bfd_size_type addr = reloc_entry->address;
226   bfd_vma output_base = 0;
227   asection *output_section;
228   bfd_boolean relocatable = (output_bfd != NULL);
229 
230   /* Is the address of the relocation really within the section?  */
231   if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
232     return bfd_reloc_outofrange;
233 
234   if (bfd_is_und_section (symbol->section)
235       && (symbol->flags & BSF_WEAK) == 0
236       && !relocatable)
237     return bfd_reloc_undefined;
238 
239   output_section = symbol->section->output_section;
240   relocation = symbol->value;
241   /* Convert input-section-relative symbol value to absolute.  */
242   if (relocatable)
243     output_base = 0;
244   else
245     output_base = output_section->vma;
246 
247   if ((symbol->name
248        && symbol->section->name
249        && !strcmp (symbol->name, symbol->section->name))
250       || !relocatable)
251     {
252       relocation += output_base + symbol->section->output_offset;
253     }
254 
255   relocation += reloc_entry->addend;
256 
257   if (relocatable)
258     {
259       /* This output will be relocatable ... like ld -r. */
260       reloc_entry->address += input_section->output_offset;
261       reloc_entry->addend += symbol->section->output_offset;
262     }
263   else
264     {
265       reloc_entry->addend = 0;
266     }
267 
268   /* Here the variable relocation holds the final address of the
269      symbol we are relocating against, plus any addend.  */
270   x = relocation & 0xFFFF0000;
271   x >>=16;
272   bfd_put_16 (abfd, x, (unsigned char *) data + addr + 2);
273 
274   x = relocation & 0x0000FFFF;
275   bfd_put_16 (abfd, x, (unsigned char *) data + addr);
276   return bfd_reloc_ok;
277 }
278 
279 /* bfin_bfd_reloc handles the blackfin arithmetic relocations.
280    Use this instead of bfd_perform_relocation.  */
281 static bfd_reloc_status_type
bfin_bfd_reloc(bfd * abfd,arelent * reloc_entry,asymbol * symbol,PTR data,asection * input_section,bfd * output_bfd,char ** error_message ATTRIBUTE_UNUSED)282 bfin_bfd_reloc (bfd *abfd,
283 		arelent *reloc_entry,
284      		asymbol *symbol,
285      		PTR data,
286      		asection *input_section,
287      		bfd *output_bfd,
288      		char **error_message ATTRIBUTE_UNUSED)
289 {
290   bfd_vma relocation;
291   bfd_size_type addr = reloc_entry->address;
292   bfd_vma output_base = 0;
293   reloc_howto_type *howto = reloc_entry->howto;
294   asection *output_section;
295   bfd_boolean relocatable = (output_bfd != NULL);
296 
297   /* Is the address of the relocation really within the section?  */
298   if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
299     return bfd_reloc_outofrange;
300 
301   if (bfd_is_und_section (symbol->section)
302       && (symbol->flags & BSF_WEAK) == 0
303       && !relocatable)
304     return bfd_reloc_undefined;
305 
306   /* Get symbol value.  (Common symbols are special.)  */
307   if (bfd_is_com_section (symbol->section))
308     relocation = 0;
309   else
310     relocation = symbol->value;
311 
312   output_section = symbol->section->output_section;
313 
314   /* Convert input-section-relative symbol value to absolute.  */
315   if (relocatable)
316     output_base = 0;
317   else
318     output_base = output_section->vma;
319 
320   if (!relocatable || !strcmp (symbol->name, symbol->section->name))
321     relocation += output_base + symbol->section->output_offset;
322 
323   if (!relocatable && !strcmp (symbol->name, symbol->section->name))
324     {
325       /* Add in supplied addend.  */
326       relocation += reloc_entry->addend;
327     }
328 
329   /* Here the variable relocation holds the final address of the
330      symbol we are relocating against, plus any addend.  */
331 
332   if (howto->pc_relative == TRUE)
333     {
334       relocation -= input_section->output_section->vma + input_section->output_offset;
335 
336       if (howto->pcrel_offset == TRUE)
337         relocation -= reloc_entry->address;
338     }
339 
340   if (relocatable)
341     {
342       reloc_entry->address += input_section->output_offset;
343       reloc_entry->addend += symbol->section->output_offset;
344     }
345 
346   if (howto->complain_on_overflow != complain_overflow_dont)
347     {
348       bfd_reloc_status_type status;
349 
350       status = bfd_check_overflow (howto->complain_on_overflow,
351                                   howto->bitsize,
352                                   howto->rightshift,
353                                   bfd_arch_bits_per_address(abfd),
354                                   relocation);
355       if (status != bfd_reloc_ok)
356 	return status;
357     }
358 
359   /* If rightshift is 1 and the number odd, return error.  */
360   if (howto->rightshift && (relocation & 0x01))
361     {
362       fprintf(stderr, "relocation should be even number\n");
363       return bfd_reloc_overflow;
364     }
365 
366   relocation >>= (bfd_vma) howto->rightshift;
367 
368   /* Shift everything up to where it's going to be used.  */
369 
370   relocation <<= (bfd_vma) howto->bitpos;
371 
372 #define DOIT(x)								\
373   x = ( (x & ~howto->dst_mask) | (relocation & howto->dst_mask))
374 
375   /* handle 8 and 16 bit relocations here. */
376   switch (howto->size)
377     {
378     case 0:
379       {
380         char x = bfd_get_8 (abfd, (char *) data + addr);
381         DOIT (x);
382         bfd_put_8 (abfd, x, (unsigned char *) data + addr);
383       }
384       break;
385 
386     case 1:
387       {
388         unsigned short x = bfd_get_16 (abfd, (bfd_byte *) data + addr);
389         DOIT (x);
390         bfd_put_16 (abfd, (bfd_vma) x, (unsigned char *) data + addr);
391       }
392       break;
393 
394     default:
395       return bfd_reloc_other;
396     }
397 
398   return bfd_reloc_ok;
399 }
400 
401 /* HOWTO Table for blackfin.
402    Blackfin relocations are fairly complicated.
403    Some of the salient features are
404    a. Even numbered offsets. A number of (not all) relocations are
405       even numbered. This means that the rightmost bit is not stored.
406       Needs to right shift by 1 and check to see if value is not odd
407    b. A relocation can be an expression. An expression takes on
408       a variety of relocations arranged in a stack.
409    As a result, we cannot use the standard generic function as special
410    function. We will have our own, which is very similar to the standard
411    generic function except that it understands how to get the value from
412    the relocation stack. .  */
413 
414 #define BFIN_RELOC_MIN 0
415 #define BFIN_RELOC_MAX 0x21
416 #define BFIN_GNUEXT_RELOC_MIN 0x40
417 #define BFIN_GNUEXT_RELOC_MAX 0x43
418 #define BFIN_ARELOC_MIN 0xE0
419 #define BFIN_ARELOC_MAX 0xF3
420 
421 static reloc_howto_type bfin_howto_table [] =
422 {
423   /* This reloc does nothing. .  */
424   HOWTO (R_unused0,		/* type.  */
425 	 0,			/* rightshift.  */
426 	 2,			/* size (0 = byte, 1 = short, 2 = long).  */
427 	 32,			/* bitsize.  */
428 	 FALSE,			/* pc_relative.  */
429 	 0,			/* bitpos.  */
430 	 complain_overflow_bitfield, /* complain_on_overflow.  */
431 	 bfd_elf_generic_reloc,	/* special_function.  */
432 	 "R_unused0",		/* name.  */
433 	 FALSE,			/* partial_inplace.  */
434 	 0,			/* src_mask.  */
435 	 0,			/* dst_mask.  */
436 	 FALSE),		/* pcrel_offset.  */
437 
438   HOWTO (R_pcrel5m2,		/* type.  */
439 	 1,			/* rightshift.  */
440 	 1,			/* size (0 = byte, 1 = short, 2 = long)..  */
441 	 4,			/* bitsize.  */
442 	 TRUE,			/* pc_relative.  */
443 	 0,			/* bitpos.  */
444 	 complain_overflow_unsigned, /* complain_on_overflow.  */
445 	 bfin_bfd_reloc,	/* special_function.  */
446 	 "R_pcrel5m2",		/* name.  */
447 	 FALSE,			/* partial_inplace.  */
448 	 0,			/* src_mask.  */
449 	 0x0000000F,		/* dst_mask.  */
450 	 FALSE),		/* pcrel_offset.  */
451 
452   HOWTO (R_unused1,		/* type.  */
453 	 0,			/* rightshift.  */
454 	 2,			/* size (0 = byte, 1 = short, 2 = long).  */
455 	 32,			/* bitsize.  */
456 	 FALSE,			/* pc_relative.  */
457 	 0,			/* bitpos.  */
458 	 complain_overflow_bitfield, /* complain_on_overflow.  */
459 	 bfd_elf_generic_reloc,	/* special_function.  */
460 	 "R_unused1",		/* name.  */
461 	 FALSE,			/* partial_inplace.  */
462 	 0,			/* src_mask.  */
463 	 0,			/* dst_mask.  */
464 	 FALSE),		/* pcrel_offset.  */
465 
466   HOWTO (R_pcrel10,		/* type.  */
467 	 1,			/* rightshift.  */
468 	 1,			/* size (0 = byte, 1 = short, 2 = long).  */
469 	 10,			/* bitsize.  */
470 	 TRUE,			/* pc_relative.  */
471 	 0,			/* bitpos.  */
472 	 complain_overflow_signed, /* complain_on_overflow.  */
473 	 bfin_bfd_reloc,	/* special_function.  */
474 	 "R_pcrel10",		/* name.  */
475 	 FALSE,			/* partial_inplace.  */
476 	 0,			/* src_mask.  */
477 	 0x000003FF,		/* dst_mask.  */
478 	 TRUE),			/* pcrel_offset.  */
479 
480   HOWTO (R_pcrel12_jump,	/* type.  */
481 	 1,			/* rightshift.  */
482 				/* the offset is actually 13 bit
483 				   aligned on a word boundary so
484 				   only 12 bits have to be used.
485 				   Right shift the rightmost bit..  */
486 	 1,			/* size (0 = byte, 1 = short, 2 = long).  */
487 	 12,			/* bitsize.  */
488 	 TRUE,			/* pc_relative.  */
489 	 0,			/* bitpos.  */
490 	 complain_overflow_signed, /* complain_on_overflow.  */
491 	 bfin_bfd_reloc,	/* special_function.  */
492 	 "R_pcrel12_jump",	/* name.  */
493 	 FALSE,			/* partial_inplace.  */
494 	 0,			/* src_mask.  */
495 	 0x0FFF,		/* dst_mask.  */
496 	 TRUE),			/* pcrel_offset.  */
497 
498   HOWTO (R_rimm16,		/* type.  */
499 	 0,			/* rightshift.  */
500 	 1,			/* size (0 = byte, 1 = short, 2 = long).  */
501 	 16,			/* bitsize.  */
502 	 FALSE,			/* pc_relative.  */
503 	 0,			/* bitpos.  */
504 	 complain_overflow_signed, /* complain_on_overflow.  */
505 	 bfin_imm16_reloc,	/* special_function.  */
506 	 "R_rimm16",		/* name.  */
507 	 FALSE,			/* partial_inplace.  */
508 	 0,			/* src_mask.  */
509 	 0x0000FFFF,		/* dst_mask.  */
510 	 TRUE),			/* pcrel_offset.  */
511 
512   HOWTO (R_luimm16,		/* type.  */
513 	 0,			/* rightshift.  */
514 	 1,			/* size (0 = byte, 1 = short, 2 = long).  */
515 	 16,			/* bitsize.  */
516 	 FALSE,			/* pc_relative.  */
517 	 0,			/* bitpos.  */
518 	 complain_overflow_dont, /* complain_on_overflow.  */
519 	 bfin_imm16_reloc,	/* special_function.  */
520 	 "R_luimm16",		/* name.  */
521 	 FALSE,			/* partial_inplace.  */
522 	 0,			/* src_mask.  */
523 	 0x0000FFFF,		/* dst_mask.  */
524 	 TRUE),			/* pcrel_offset.  */
525 
526   HOWTO (R_huimm16,		/* type.  */
527 	 16,			/* rightshift.  */
528 	 1,			/* size (0 = byte, 1 = short, 2 = long).  */
529 	 16,			/* bitsize.  */
530 	 FALSE,			/* pc_relative.  */
531 	 0,			/* bitpos.  */
532 	 complain_overflow_unsigned, /* complain_on_overflow.  */
533 	 bfin_imm16_reloc,	/* special_function.  */
534 	 "R_huimm16",		/* name.  */
535 	 FALSE,			/* partial_inplace.  */
536 	 0,			/* src_mask.  */
537 	 0x0000FFFF,		/* dst_mask.  */
538 	 TRUE),			/* pcrel_offset.  */
539 
540   HOWTO (R_pcrel12_jump_s,	/* type.  */
541 	 1,			/* rightshift.  */
542 	 1,			/* size (0 = byte, 1 = short, 2 = long).  */
543 	 12,			/* bitsize.  */
544 	 TRUE,			/* pc_relative.  */
545 	 0,			/* bitpos.  */
546 	 complain_overflow_signed, /* complain_on_overflow.  */
547 	 bfin_bfd_reloc,	/* special_function.  */
548 	 "R_pcrel12_jump_s",	/* name.  */
549 	 FALSE,			/* partial_inplace.  */
550 	 0,			/* src_mask.  */
551 	 0x00000FFF,		/* dst_mask.  */
552 	 TRUE),			/* pcrel_offset.  */
553 
554   HOWTO (R_pcrel24_jump_x,	/* type.  */
555          1,			/* rightshift.  */
556          2,			/* size (0 = byte, 1 = short, 2 = long).  */
557          24,			/* bitsize.  */
558          TRUE,			/* pc_relative.  */
559          0,			/* bitpos.  */
560          complain_overflow_signed, /* complain_on_overflow.  */
561          bfin_pcrel24_reloc,	/* special_function.  */
562          "R_pcrel24_jump_x",	/* name.  */
563 	 FALSE,			/* partial_inplace.  */
564 	 0,			/* src_mask.  */
565 	 0x00FFFFFF,		/* dst_mask.  */
566 	 TRUE),			/* pcrel_offset.  */
567 
568   HOWTO (R_pcrel24,		/* type.  */
569 	 1,			/* rightshift.  */
570 	 2,			/* size (0 = byte, 1 = short, 2 = long).  */
571 	 24,			/* bitsize.  */
572 	 TRUE,			/* pc_relative.  */
573 	 0,			/* bitpos.  */
574 	 complain_overflow_signed, /* complain_on_overflow.  */
575 	 bfin_pcrel24_reloc,	/* special_function.  */
576 	 "R_pcrel24",		/* name.  */
577 	 FALSE,			/* partial_inplace.  */
578 	 0,			/* src_mask.  */
579 	 0x00FFFFFF,		/* dst_mask.  */
580 	 TRUE),			/* pcrel_offset.  */
581 
582   HOWTO (R_unusedb,		/* type.  */
583 	 0,			/* rightshift.  */
584 	 2,			/* size (0 = byte, 1 = short, 2 = long).  */
585 	 32,			/* bitsize.  */
586 	 FALSE,			/* pc_relative.  */
587 	 0,			/* bitpos.  */
588 	 complain_overflow_dont, /* complain_on_overflow.  */
589 	 bfd_elf_generic_reloc,	/* special_function.  */
590 	 "R_unusedb",		/* name.  */
591 	 FALSE,			/* partial_inplace.  */
592 	 0,			/* src_mask.  */
593 	 0,			/* dst_mask.  */
594 	 FALSE),		/* pcrel_offset.  */
595 
596   HOWTO (R_unusedc,		/* type.  */
597 	 0,			/* rightshift.  */
598 	 2,			/* size (0 = byte, 1 = short, 2 = long).  */
599 	 32,			/* bitsize.  */
600 	 FALSE,			/* pc_relative.  */
601 	 0,			/* bitpos.  */
602 	 complain_overflow_dont, /* complain_on_overflow.  */
603 	 bfd_elf_generic_reloc,	/* special_function.  */
604 	 "R_unusedc",		/* name.  */
605 	 FALSE,			/* partial_inplace.  */
606 	 0,			/* src_mask.  */
607 	 0,			/* dst_mask.  */
608 	 FALSE),		/* pcrel_offset.  */
609 
610   HOWTO (R_pcrel24_jump_l,	/* type.  */
611 	 1,			/* rightshift.  */
612 	 2,			/* size (0 = byte, 1 = short, 2 = long).  */
613 	 24,			/* bitsize.  */
614 	 TRUE,			/* pc_relative.  */
615 	 0,			/* bitpos.  */
616 	 complain_overflow_signed, /* complain_on_overflow.  */
617 	 bfin_pcrel24_reloc,	/* special_function.  */
618 	 "R_pcrel24_jump_l",	/* name.  */
619 	 FALSE,			/* partial_inplace.  */
620 	 0,			/* src_mask.  */
621 	 0x00FFFFFF,		/* dst_mask.  */
622 	 TRUE),			/* pcrel_offset.  */
623 
624   HOWTO (R_pcrel24_call_x,	/* type.  */
625 	 1,			/* rightshift.  */
626 	 2,			/* size (0 = byte, 1 = short, 2 = long).  */
627 	 24,			/* bitsize.  */
628 	 TRUE,			/* pc_relative.  */
629 	 0,			/* bitpos.  */
630 	 complain_overflow_signed, /* complain_on_overflow.  */
631 	 bfin_pcrel24_reloc,	/* special_function.  */
632 	 "R_pcrel24_call_x",	/* name.  */
633 	 FALSE,			/* partial_inplace.  */
634 	 0,			/* src_mask.  */
635 	 0x00FFFFFF,		/* dst_mask.  */
636 	 TRUE),			/* pcrel_offset.  */
637 
638   HOWTO (R_var_eq_symb,		/* type.  */
639 	 0,			/* rightshift.  */
640 	 2,			/* size (0 = byte, 1 = short, 2 = long).  */
641 	 32,			/* bitsize.  */
642 	 FALSE,			/* pc_relative.  */
643 	 0,			/* bitpos.  */
644 	 complain_overflow_bitfield, /* complain_on_overflow.  */
645 	 bfin_bfd_reloc,	/* special_function.  */
646 	 "R_var_eq_symb",		/* name.  */
647 	 FALSE,			/* partial_inplace.  */
648 	 0,			/* src_mask.  */
649 	 0,			/* dst_mask.  */
650 	 FALSE),		/* pcrel_offset.  */
651 
652   HOWTO (R_byte_data,		/* type.  */
653 	 0,			/* rightshift.  */
654 	 0,			/* size (0 = byte, 1 = short, 2 = long).  */
655 	 8,			/* bitsize.  */
656 	 FALSE,			/* pc_relative.  */
657 	 0,			/* bitpos.  */
658 	 complain_overflow_unsigned, /* complain_on_overflow.  */
659 	 bfin_bfd_reloc,	/* special_function.  */
660 	 "R_byte_data",		/* name.  */
661 	 FALSE,			/* partial_inplace.  */
662 	 0,			/* src_mask.  */
663 	 0xFF,			/* dst_mask.  */
664 	 TRUE),			/* pcrel_offset.  */
665 
666   HOWTO (R_byte2_data,		/* type.  */
667 	 0,			/* rightshift.  */
668 	 1,			/* size (0 = byte, 1 = short, 2 = long).  */
669 	 16,			/* bitsize.  */
670 	 FALSE,			/* pc_relative.  */
671 	 0,			/* bitpos.  */
672 	 complain_overflow_signed, /* complain_on_overflow.  */
673 	 bfin_bfd_reloc,	/* special_function.  */
674 	 "R_byte2_data",	/* name.  */
675 	 FALSE,			/* partial_inplace.  */
676 	 0,			/* src_mask.  */
677 	 0xFFFF,		/* dst_mask.  */
678 	 TRUE),			/* pcrel_offset.  */
679 
680   HOWTO (R_byte4_data,		/* type.  */
681 	 0,			/* rightshift.  */
682 	 2,			/* size (0 = byte, 1 = short, 2 = long).  */
683 	 32,			/* bitsize.  */
684 	 FALSE,			/* pc_relative.  */
685 	 0,			/* bitpos.  */
686 	 complain_overflow_unsigned, /* complain_on_overflow.  */
687 	 bfin_byte4_reloc,	/* special_function.  */
688 	 "R_byte4_data",	/* name.  */
689 	 FALSE,			/* partial_inplace.  */
690 	 0,			/* src_mask.  */
691 	 0xFFFFFFFF,		/* dst_mask.  */
692 	 TRUE),			/* pcrel_offset.  */
693 
694   HOWTO (R_pcrel11,		/* type.  */
695 	 1,			/* rightshift.  */
696 	 1,			/* size (0 = byte, 1 = short, 2 = long).  */
697 	 10,			/* bitsize.  */
698 	 TRUE,			/* pc_relative.  */
699 	 0,			/* bitpos.  */
700 	 complain_overflow_unsigned, /* complain_on_overflow.  */
701 	 bfin_bfd_reloc,	/* special_function.  */
702 	 "R_pcrel11",		/* name.  */
703 	 FALSE,			/* partial_inplace.  */
704 	 0,			/* src_mask.  */
705 	 0x000003FF,		/* dst_mask.  */
706 	 FALSE),		/* pcrel_offset.  */
707 
708 
709   /* A 18-bit signed operand with the GOT offset for the address of
710      the symbol.  */
711   HOWTO (R_BFIN_GOT17M4,        /* type */
712 	 2,			/* rightshift */
713 	 1,			/* size (0 = byte, 1 = short, 2 = long) */
714 	 16,			/* bitsize */
715 	 FALSE,			/* pc_relative */
716 	 0,			/* bitpos */
717 	 complain_overflow_signed, /* complain_on_overflow */
718 	 bfd_elf_generic_reloc,	/* special_function */
719 	 "R_BFIN_GOT12",		/* name */
720 	 FALSE,			/* partial_inplace */
721 	 0xffff,	        /* src_mask */
722 	 0xffff,	        /* dst_mask */
723 	 FALSE),	        /* pcrel_offset */
724 
725   /* The upper 16 bits of the GOT offset for the address of the
726      symbol.  */
727   HOWTO (R_BFIN_GOTHI,	        /* type */
728 	 0,			/* rightshift */
729 	 1,			/* size (0 = byte, 1 = short, 2 = long) */
730 	 16,			/* bitsize */
731 	 FALSE,			/* pc_relative */
732 	 0,			/* bitpos */
733 	 complain_overflow_dont, /* complain_on_overflow */
734 	 bfd_elf_generic_reloc,	/* special_function */
735 	 "R_BFIN_GOTHI",		/* name */
736 	 FALSE,			/* partial_inplace */
737 	 0xffff,		        /* src_mask */
738 	 0xffff,		/* dst_mask */
739 	 FALSE),	        /* pcrel_offset */
740 
741   /* The lower 16 bits of the GOT offset for the address of the
742      symbol.  */
743   HOWTO (R_BFIN_GOTLO,	        /* type */
744 	 0,			/* rightshift */
745 	 1,			/* size (0 = byte, 1 = short, 2 = long) */
746 	 16,			/* bitsize */
747 	 FALSE,			/* pc_relative */
748 	 0,			/* bitpos */
749 	 complain_overflow_dont, /* complain_on_overflow */
750 	 bfd_elf_generic_reloc,	/* special_function */
751 	 "R_BFIN_GOTLO",		/* name */
752 	 FALSE,			/* partial_inplace */
753 	 0xffff,		/* src_mask */
754 	 0xffff,		/* dst_mask */
755 	 FALSE),	        /* pcrel_offset */
756 
757   /* The 32-bit address of the canonical descriptor of a function.  */
758   HOWTO (R_BFIN_FUNCDESC,	/* type */
759 	 0,			/* rightshift */
760 	 2,			/* size (0 = byte, 1 = short, 2 = long) */
761 	 32,			/* bitsize */
762 	 FALSE,			/* pc_relative */
763 	 0,			/* bitpos */
764 	 complain_overflow_bitfield, /* complain_on_overflow */
765 	 bfd_elf_generic_reloc,	/* special_function */
766 	 "R_BFIN_FUNCDESC",	/* name */
767 	 FALSE,			/* partial_inplace */
768 	 0xffffffff,		/* src_mask */
769 	 0xffffffff,		/* dst_mask */
770 	 FALSE),		/* pcrel_offset */
771 
772   /* A 12-bit signed operand with the GOT offset for the address of
773      canonical descriptor of a function.  */
774   HOWTO (R_BFIN_FUNCDESC_GOT17M4,	/* type */
775 	 2,			/* rightshift */
776 	 1,			/* size (0 = byte, 1 = short, 2 = long) */
777 	 16,			/* bitsize */
778 	 FALSE,			/* pc_relative */
779 	 0,			/* bitpos */
780 	 complain_overflow_signed, /* complain_on_overflow */
781 	 bfd_elf_generic_reloc,	/* special_function */
782 	 "R_BFIN_FUNCDESC_GOT17M4", /* name */
783 	 FALSE,			/* partial_inplace */
784 	 0xffff,	        /* src_mask */
785 	 0xffff,	        /* dst_mask */
786 	 FALSE),	        /* pcrel_offset */
787 
788   /* The upper 16 bits of the GOT offset for the address of the
789      canonical descriptor of a function.  */
790   HOWTO (R_BFIN_FUNCDESC_GOTHI,	/* type */
791 	 0,			/* rightshift */
792 	 1,			/* size (0 = byte, 1 = short, 2 = long) */
793 	 16,			/* bitsize */
794 	 FALSE,			/* pc_relative */
795 	 0,			/* bitpos */
796 	 complain_overflow_dont, /* complain_on_overflow */
797 	 bfd_elf_generic_reloc,	/* special_function */
798 	 "R_BFIN_FUNCDESC_GOTHI", /* name */
799 	 FALSE,			/* partial_inplace */
800 	 0xffff,		/* src_mask */
801 	 0xffff,		/* dst_mask */
802 	 FALSE),	        /* pcrel_offset */
803 
804   /* The lower 16 bits of the GOT offset for the address of the
805      canonical descriptor of a function.  */
806   HOWTO (R_BFIN_FUNCDESC_GOTLO,	/* type */
807 	 0,			/* rightshift */
808 	 1,			/* size (0 = byte, 1 = short, 2 = long) */
809 	 16,			/* bitsize */
810 	 FALSE,			/* pc_relative */
811 	 0,			/* bitpos */
812 	 complain_overflow_dont, /* complain_on_overflow */
813 	 bfd_elf_generic_reloc,	/* special_function */
814 	 "R_BFIN_FUNCDESC_GOTLO", /* name */
815 	 FALSE,			/* partial_inplace */
816 	 0xffff,		/* src_mask */
817 	 0xffff,		/* dst_mask */
818 	 FALSE),	        /* pcrel_offset */
819 
820   /* The 32-bit address of the canonical descriptor of a function.  */
821   HOWTO (R_BFIN_FUNCDESC_VALUE,	/* type */
822 	 0,			/* rightshift */
823 	 2,			/* size (0 = byte, 1 = short, 2 = long) */
824 	 64,			/* bitsize */
825 	 FALSE,			/* pc_relative */
826 	 0,			/* bitpos */
827 	 complain_overflow_bitfield, /* complain_on_overflow */
828 	 bfd_elf_generic_reloc,	/* special_function */
829 	 "R_BFIN_FUNCDESC_VALUE", /* name */
830 	 FALSE,			/* partial_inplace */
831 	 0xffffffff,		/* src_mask */
832 	 0xffffffff,		/* dst_mask */
833 	 FALSE),		/* pcrel_offset */
834 
835   /* A 12-bit signed operand with the GOT offset for the address of
836      canonical descriptor of a function.  */
837   HOWTO (R_BFIN_FUNCDESC_GOTOFF17M4, /* type */
838 	 2,			/* rightshift */
839 	 1,			/* size (0 = byte, 1 = short, 2 = long) */
840 	 16,			/* bitsize */
841 	 FALSE,			/* pc_relative */
842 	 0,			/* bitpos */
843 	 complain_overflow_signed, /* complain_on_overflow */
844 	 bfd_elf_generic_reloc,	/* special_function */
845 	 "R_BFIN_FUNCDESC_GOTOFF17M4", /* name */
846 	 FALSE,			/* partial_inplace */
847 	 0xffff,	        /* src_mask */
848 	 0xffff,	        /* dst_mask */
849 	 FALSE),	        /* pcrel_offset */
850 
851   /* The upper 16 bits of the GOT offset for the address of the
852      canonical descriptor of a function.  */
853   HOWTO (R_BFIN_FUNCDESC_GOTOFFHI, /* type */
854 	 0,			/* rightshift */
855 	 1,			/* size (0 = byte, 1 = short, 2 = long) */
856 	 16,			/* bitsize */
857 	 FALSE,			/* pc_relative */
858 	 0,			/* bitpos */
859 	 complain_overflow_dont, /* complain_on_overflow */
860 	 bfd_elf_generic_reloc,	/* special_function */
861 	 "R_BFIN_FUNCDESC_GOTOFFHI", /* name */
862 	 FALSE,			/* partial_inplace */
863 	 0xffff,		/* src_mask */
864 	 0xffff,		/* dst_mask */
865 	 FALSE),	        /* pcrel_offset */
866 
867   /* The lower 16 bits of the GOT offset for the address of the
868      canonical descriptor of a function.  */
869   HOWTO (R_BFIN_FUNCDESC_GOTOFFLO, /* type */
870 	 0,			/* rightshift */
871 	 1,			/* size (0 = byte, 1 = short, 2 = long) */
872 	 16,			/* bitsize */
873 	 FALSE,			/* pc_relative */
874 	 0,			/* bitpos */
875 	 complain_overflow_dont, /* complain_on_overflow */
876 	 bfd_elf_generic_reloc,	/* special_function */
877 	 "R_BFIN_FUNCDESC_GOTOFFLO", /* name */
878 	 FALSE,			/* partial_inplace */
879 	 0xffff,		/* src_mask */
880 	 0xffff,		/* dst_mask */
881 	 FALSE),	        /* pcrel_offset */
882 
883   /* A 12-bit signed operand with the GOT offset for the address of
884      the symbol.  */
885   HOWTO (R_BFIN_GOTOFF17M4,     /* type */
886 	 2,			/* rightshift */
887 	 1,			/* size (0 = byte, 1 = short, 2 = long) */
888 	 16,			/* bitsize */
889 	 FALSE,			/* pc_relative */
890 	 0,			/* bitpos */
891 	 complain_overflow_signed, /* complain_on_overflow */
892 	 bfd_elf_generic_reloc,	/* special_function */
893 	 "R_BFIN_GOTOFF17M4",	/* name */
894 	 FALSE,			/* partial_inplace */
895 	 0xffff,	        /* src_mask */
896 	 0xffff,	        /* dst_mask */
897 	 FALSE),	        /* pcrel_offset */
898 
899   /* The upper 16 bits of the GOT offset for the address of the
900      symbol.  */
901   HOWTO (R_BFIN_GOTOFFHI,        /* type */
902 	 0,			/* rightshift */
903 	 1,			/* size (0 = byte, 1 = short, 2 = long) */
904 	 16,			/* bitsize */
905 	 FALSE,			/* pc_relative */
906 	 0,			/* bitpos */
907 	 complain_overflow_dont, /* complain_on_overflow */
908 	 bfd_elf_generic_reloc,	/* special_function */
909 	 "R_BFIN_GOTOFFHI",	/* name */
910 	 FALSE,			/* partial_inplace */
911 	 0xffff,		/* src_mask */
912 	 0xffff,		/* dst_mask */
913 	 FALSE),	        /* pcrel_offset */
914 
915   /* The lower 16 bits of the GOT offset for the address of the
916      symbol.  */
917   HOWTO (R_BFIN_GOTOFFLO,	/* type */
918 	 0,			/* rightshift */
919 	 1,			/* size (0 = byte, 1 = short, 2 = long) */
920 	 16,			/* bitsize */
921 	 FALSE,			/* pc_relative */
922 	 0,			/* bitpos */
923 	 complain_overflow_dont, /* complain_on_overflow */
924 	 bfd_elf_generic_reloc,	/* special_function */
925 	 "R_BFIN_GOTOFFLO",	/* name */
926 	 FALSE,			/* partial_inplace */
927 	 0xffff,		/* src_mask */
928 	 0xffff,		/* dst_mask */
929 	 FALSE),	        /* pcrel_offset */
930 };
931 
932 static reloc_howto_type bfin_gnuext_howto_table [] =
933 {
934   HOWTO (R_pltpc,		/* type.  */
935 	 0,			/* rightshift.  */
936 	 1,			/* size (0 = byte, 1 = short, 2 = long).  */
937 	 16,			/* bitsize.  */
938 	 FALSE,			/* pc_relative.  */
939 	 0,			/* bitpos.  */
940 	 complain_overflow_bitfield, /* complain_on_overflow.  */
941 	 bfin_pltpc_reloc,	/* special_function.  */
942 	 "R_pltpc",		/* name.  */
943 	 FALSE,			/* partial_inplace.  */
944 	 0xffff,		/* src_mask.  */
945 	 0xffff,		/* dst_mask.  */
946 	 FALSE),		/* pcrel_offset.  */
947 
948   HOWTO (R_got,			/* type.  */
949 	 0,			/* rightshift.  */
950 	 1,			/* size (0 = byte, 1 = short, 2 = long).  */
951 	 16,			/* bitsize.  */
952 	 FALSE,			/* pc_relative.  */
953 	 0,			/* bitpos.  */
954 	 complain_overflow_bitfield, /* complain_on_overflow.  */
955 	 bfd_elf_generic_reloc,	/* special_function.  */
956 	 "R_got",		/* name.  */
957 	 FALSE,			/* partial_inplace.  */
958 	 0x7fff,		/* src_mask.  */
959 	 0x7fff,		/* dst_mask.  */
960 	 FALSE),		/* pcrel_offset.  */
961 
962 /* GNU extension to record C++ vtable hierarchy.  */
963   HOWTO (R_BFIN_GNU_VTINHERIT, /* type.  */
964          0,                     /* rightshift.  */
965          2,                     /* size (0 = byte, 1 = short, 2 = long).  */
966          0,                     /* bitsize.  */
967          FALSE,                 /* pc_relative.  */
968          0,                     /* bitpos.  */
969          complain_overflow_dont, /* complain_on_overflow.  */
970          NULL,                  /* special_function.  */
971          "R_BFIN_GNU_VTINHERIT", /* name.  */
972          FALSE,                 /* partial_inplace.  */
973          0,                     /* src_mask.  */
974          0,                     /* dst_mask.  */
975          FALSE),                /* pcrel_offset.  */
976 
977 /* GNU extension to record C++ vtable member usage.  */
978   HOWTO (R_BFIN_GNU_VTENTRY,	/* type.  */
979          0,                     /* rightshift.  */
980          2,                     /* size (0 = byte, 1 = short, 2 = long).  */
981          0,                     /* bitsize.  */
982          FALSE,                 /* pc_relative.  */
983          0,			/* bitpos.  */
984          complain_overflow_dont, /* complain_on_overflow.  */
985          _bfd_elf_rel_vtable_reloc_fn, /* special_function.  */
986          "R_BFIN_GNU_VTENTRY",	/* name.  */
987          FALSE,                 /* partial_inplace.  */
988          0,                     /* src_mask.  */
989          0,                     /* dst_mask.  */
990          FALSE)                 /* pcrel_offset.  */
991 };
992 
993 struct bfin_reloc_map
994 {
995   bfd_reloc_code_real_type 	bfd_reloc_val;
996   unsigned int			bfin_reloc_val;
997 };
998 
999 static const struct bfin_reloc_map bfin_reloc_map [] =
1000 {
1001   { BFD_RELOC_NONE,			R_unused0 },
1002   { BFD_RELOC_BFIN_5_PCREL,		R_pcrel5m2 },
1003   { BFD_RELOC_NONE,			R_unused1 },
1004   { BFD_RELOC_BFIN_10_PCREL,		R_pcrel10 },
1005   { BFD_RELOC_BFIN_12_PCREL_JUMP,	R_pcrel12_jump },
1006   { BFD_RELOC_BFIN_16_IMM,		R_rimm16 },
1007   { BFD_RELOC_BFIN_16_LOW,		R_luimm16 },
1008   { BFD_RELOC_BFIN_16_HIGH,		R_huimm16 },
1009   { BFD_RELOC_BFIN_12_PCREL_JUMP_S,	R_pcrel12_jump_s },
1010   { BFD_RELOC_24_PCREL,			R_pcrel24 },
1011   { BFD_RELOC_24_PCREL,			R_pcrel24 },
1012   { BFD_RELOC_BFIN_24_PCREL_JUMP_L,	R_pcrel24_jump_l },
1013   { BFD_RELOC_NONE,			R_unusedb },
1014   { BFD_RELOC_NONE,			R_unusedc },
1015   { BFD_RELOC_BFIN_24_PCREL_CALL_X,	R_pcrel24_call_x },
1016   { BFD_RELOC_8,			R_byte_data },
1017   { BFD_RELOC_16,			R_byte2_data },
1018   { BFD_RELOC_32,			R_byte4_data },
1019   { BFD_RELOC_BFIN_11_PCREL,		R_pcrel11 },
1020   { BFD_RELOC_BFIN_GOT,			R_got },
1021   { BFD_RELOC_BFIN_PLTPC,		R_pltpc },
1022 
1023   { BFD_RELOC_BFIN_GOT17M4,      R_BFIN_GOT17M4 },
1024   { BFD_RELOC_BFIN_GOTHI,      R_BFIN_GOTHI },
1025   { BFD_RELOC_BFIN_GOTLO,      R_BFIN_GOTLO },
1026   { BFD_RELOC_BFIN_FUNCDESC,   R_BFIN_FUNCDESC },
1027   { BFD_RELOC_BFIN_FUNCDESC_GOT17M4, R_BFIN_FUNCDESC_GOT17M4 },
1028   { BFD_RELOC_BFIN_FUNCDESC_GOTHI, R_BFIN_FUNCDESC_GOTHI },
1029   { BFD_RELOC_BFIN_FUNCDESC_GOTLO, R_BFIN_FUNCDESC_GOTLO },
1030   { BFD_RELOC_BFIN_FUNCDESC_VALUE, R_BFIN_FUNCDESC_VALUE },
1031   { BFD_RELOC_BFIN_FUNCDESC_GOTOFF17M4, R_BFIN_FUNCDESC_GOTOFF17M4 },
1032   { BFD_RELOC_BFIN_FUNCDESC_GOTOFFHI, R_BFIN_FUNCDESC_GOTOFFHI },
1033   { BFD_RELOC_BFIN_FUNCDESC_GOTOFFLO, R_BFIN_FUNCDESC_GOTOFFLO },
1034   { BFD_RELOC_BFIN_GOTOFF17M4,   R_BFIN_GOTOFF17M4 },
1035   { BFD_RELOC_BFIN_GOTOFFHI,   R_BFIN_GOTOFFHI },
1036   { BFD_RELOC_BFIN_GOTOFFLO,   R_BFIN_GOTOFFLO },
1037 
1038   { BFD_RELOC_VTABLE_INHERIT,		R_BFIN_GNU_VTINHERIT },
1039   { BFD_RELOC_VTABLE_ENTRY,		R_BFIN_GNU_VTENTRY },
1040 };
1041 
1042 
1043 static void
bfin_info_to_howto(bfd * abfd ATTRIBUTE_UNUSED,arelent * cache_ptr,Elf_Internal_Rela * dst)1044 bfin_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
1045                     arelent *cache_ptr,
1046                     Elf_Internal_Rela *dst)
1047 {
1048   unsigned int r_type;
1049 
1050   r_type = ELF32_R_TYPE (dst->r_info);
1051 
1052   if (r_type <= BFIN_RELOC_MAX)
1053     cache_ptr->howto = &bfin_howto_table [r_type];
1054 
1055   else if (r_type >= BFIN_GNUEXT_RELOC_MIN && r_type <= BFIN_GNUEXT_RELOC_MAX)
1056     cache_ptr->howto = &bfin_gnuext_howto_table [r_type - BFIN_GNUEXT_RELOC_MIN];
1057 
1058   else
1059     cache_ptr->howto = (reloc_howto_type *) NULL;
1060 
1061 }
1062 /* Given a BFD reloc type, return the howto.  */
1063 static reloc_howto_type *
bfin_bfd_reloc_type_lookup(bfd * abfd ATTRIBUTE_UNUSED,bfd_reloc_code_real_type code)1064 bfin_bfd_reloc_type_lookup (bfd * abfd ATTRIBUTE_UNUSED,
1065 			    bfd_reloc_code_real_type code)
1066 {
1067   unsigned int i;
1068   unsigned int r_type = BFIN_RELOC_MIN;
1069 
1070   for (i = sizeof (bfin_reloc_map) / sizeof (bfin_reloc_map[0]); --i;)
1071     if (bfin_reloc_map[i].bfd_reloc_val == code)
1072       r_type = bfin_reloc_map[i].bfin_reloc_val;
1073 
1074   if (r_type <= BFIN_RELOC_MAX && r_type > BFIN_RELOC_MIN)
1075     return &bfin_howto_table [r_type];
1076 
1077   else if (r_type >= BFIN_GNUEXT_RELOC_MIN && r_type <= BFIN_GNUEXT_RELOC_MAX)
1078    return &bfin_gnuext_howto_table [r_type - BFIN_GNUEXT_RELOC_MIN];
1079 
1080   return (reloc_howto_type *) NULL;
1081 
1082 }
1083 /* Given a bfin relocation type, return the howto.  */
1084 static reloc_howto_type *
bfin_reloc_type_lookup(bfd * abfd ATTRIBUTE_UNUSED,unsigned int r_type)1085 bfin_reloc_type_lookup (bfd * abfd ATTRIBUTE_UNUSED,
1086 			    unsigned int r_type)
1087 {
1088   if (r_type <= BFIN_RELOC_MAX)
1089     return &bfin_howto_table [r_type];
1090 
1091   else if (r_type >= BFIN_GNUEXT_RELOC_MIN && r_type <= BFIN_GNUEXT_RELOC_MAX)
1092    return &bfin_gnuext_howto_table [r_type - BFIN_GNUEXT_RELOC_MIN];
1093 
1094   return (reloc_howto_type *) NULL;
1095 
1096 }
1097 
1098 /* Return TRUE if the name is a local label.
1099    bfin local labels begin with L$.  */
1100 static bfd_boolean
bfin_is_local_label_name(bfd * abfd ATTRIBUTE_UNUSED,const char * label)1101 bfin_is_local_label_name (
1102      bfd *abfd ATTRIBUTE_UNUSED,
1103      const char *label)
1104 {
1105   if (label[0] == 'L' && label[1] == '$' )
1106     return TRUE;
1107 
1108   return _bfd_elf_is_local_label_name (abfd, label);
1109 }
1110 
1111 extern const bfd_target bfd_elf32_bfinfdpic_vec;
1112 #define IS_FDPIC(bfd) ((bfd)->xvec == &bfd_elf32_bfinfdpic_vec)
1113 
1114 /* An extension of the elf hash table data structure, containing some
1115    additional Blackfin-specific data.  */
1116 struct bfinfdpic_elf_link_hash_table
1117 {
1118   struct elf_link_hash_table elf;
1119 
1120   /* A pointer to the .got section.  */
1121   asection *sgot;
1122   /* A pointer to the .rel.got section.  */
1123   asection *sgotrel;
1124   /* A pointer to the .rofixup section.  */
1125   asection *sgotfixup;
1126   /* A pointer to the .plt section.  */
1127   asection *splt;
1128   /* A pointer to the .rel.plt section.  */
1129   asection *spltrel;
1130   /* GOT base offset.  */
1131   bfd_vma got0;
1132   /* Location of the first non-lazy PLT entry, i.e., the number of
1133      bytes taken by lazy PLT entries.  */
1134   bfd_vma plt0;
1135   /* A hash table holding information about which symbols were
1136      referenced with which PIC-related relocations.  */
1137   struct htab *relocs_info;
1138 };
1139 
1140 /* Get the Blackfin ELF linker hash table from a link_info structure.  */
1141 
1142 #define bfinfdpic_hash_table(info) \
1143   ((struct bfinfdpic_elf_link_hash_table *) ((info)->hash))
1144 
1145 #define bfinfdpic_got_section(info) \
1146   (bfinfdpic_hash_table (info)->sgot)
1147 #define bfinfdpic_gotrel_section(info) \
1148   (bfinfdpic_hash_table (info)->sgotrel)
1149 #define bfinfdpic_gotfixup_section(info) \
1150   (bfinfdpic_hash_table (info)->sgotfixup)
1151 #define bfinfdpic_plt_section(info) \
1152   (bfinfdpic_hash_table (info)->splt)
1153 #define bfinfdpic_pltrel_section(info) \
1154   (bfinfdpic_hash_table (info)->spltrel)
1155 #define bfinfdpic_relocs_info(info) \
1156   (bfinfdpic_hash_table (info)->relocs_info)
1157 #define bfinfdpic_got_initial_offset(info) \
1158   (bfinfdpic_hash_table (info)->got0)
1159 #define bfinfdpic_plt_initial_offset(info) \
1160   (bfinfdpic_hash_table (info)->plt0)
1161 
1162 /* Create a Blackfin ELF linker hash table.  */
1163 
1164 static struct bfd_link_hash_table *
bfinfdpic_elf_link_hash_table_create(bfd * abfd)1165 bfinfdpic_elf_link_hash_table_create (bfd *abfd)
1166 {
1167   struct bfinfdpic_elf_link_hash_table *ret;
1168   bfd_size_type amt = sizeof (struct bfinfdpic_elf_link_hash_table);
1169 
1170   ret = bfd_zalloc (abfd, amt);
1171   if (ret == NULL)
1172     return NULL;
1173 
1174   if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
1175 				      _bfd_elf_link_hash_newfunc,
1176 				      sizeof (struct elf_link_hash_entry)))
1177     {
1178       free (ret);
1179       return NULL;
1180     }
1181 
1182   return &ret->elf.root;
1183 }
1184 
1185 /* Decide whether a reference to a symbol can be resolved locally or
1186    not.  If the symbol is protected, we want the local address, but
1187    its function descriptor must be assigned by the dynamic linker.  */
1188 #define BFINFDPIC_SYM_LOCAL(INFO, H) \
1189   (_bfd_elf_symbol_refs_local_p ((H), (INFO), 1) \
1190    || ! elf_hash_table (INFO)->dynamic_sections_created)
1191 #define BFINFDPIC_FUNCDESC_LOCAL(INFO, H) \
1192   ((H)->dynindx == -1 || ! elf_hash_table (INFO)->dynamic_sections_created)
1193 
1194 /* This structure collects information on what kind of GOT, PLT or
1195    function descriptors are required by relocations that reference a
1196    certain symbol.  */
1197 struct bfinfdpic_relocs_info
1198 {
1199   /* The index of the symbol, as stored in the relocation r_info, if
1200      we have a local symbol; -1 otherwise.  */
1201   long symndx;
1202   union
1203   {
1204     /* The input bfd in which the symbol is defined, if it's a local
1205        symbol.  */
1206     bfd *abfd;
1207     /* If symndx == -1, the hash table entry corresponding to a global
1208        symbol (even if it turns out to bind locally, in which case it
1209        should ideally be replaced with section's symndx + addend).  */
1210     struct elf_link_hash_entry *h;
1211   } d;
1212   /* The addend of the relocation that references the symbol.  */
1213   bfd_vma addend;
1214 
1215   /* The fields above are used to identify an entry.  The fields below
1216      contain information on how an entry is used and, later on, which
1217      locations it was assigned.  */
1218   /* The following 2 fields record whether the symbol+addend above was
1219      ever referenced with a GOT relocation.  The 17M4 suffix indicates a
1220      GOT17M4 relocation; hilo is used for GOTLO/GOTHI pairs.  */
1221   unsigned got17m4:1;
1222   unsigned gothilo:1;
1223   /* Whether a FUNCDESC relocation references symbol+addend.  */
1224   unsigned fd:1;
1225   /* Whether a FUNCDESC_GOT relocation references symbol+addend.  */
1226   unsigned fdgot17m4:1;
1227   unsigned fdgothilo:1;
1228   /* Whether a FUNCDESC_GOTOFF relocation references symbol+addend.  */
1229   unsigned fdgoff17m4:1;
1230   unsigned fdgoffhilo:1;
1231   /* Whether symbol+addend is referenced with GOTOFF17M4, GOTOFFLO or
1232      GOTOFFHI relocations.  The addend doesn't really matter, since we
1233      envision that this will only be used to check whether the symbol
1234      is mapped to the same segment as the got.  */
1235   unsigned gotoff:1;
1236   /* Whether symbol+addend is referenced by a LABEL24 relocation.  */
1237   unsigned call:1;
1238   /* Whether symbol+addend is referenced by a 32 or FUNCDESC_VALUE
1239      relocation.  */
1240   unsigned sym:1;
1241   /* Whether we need a PLT entry for a symbol.  Should be implied by
1242      something like:
1243      (call && symndx == -1 && ! BFINFDPIC_SYM_LOCAL (info, d.h))  */
1244   unsigned plt:1;
1245   /* Whether a function descriptor should be created in this link unit
1246      for symbol+addend.  Should be implied by something like:
1247      (plt || fdgotoff17m4 || fdgotofflohi
1248       || ((fd || fdgot17m4 || fdgothilo)
1249           && (symndx != -1 || BFINFDPIC_FUNCDESC_LOCAL (info, d.h))))  */
1250   unsigned privfd:1;
1251   /* Whether a lazy PLT entry is needed for this symbol+addend.
1252      Should be implied by something like:
1253      (privfd && symndx == -1 && ! BFINFDPIC_SYM_LOCAL (info, d.h)
1254       && ! (info->flags & DF_BIND_NOW))  */
1255   unsigned lazyplt:1;
1256   /* Whether we've already emitted GOT relocations and PLT entries as
1257      needed for this symbol.  */
1258   unsigned done:1;
1259 
1260   /* The number of R_byte4_data, R_BFIN_FUNCDESC and R_BFIN_FUNCDESC_VALUE
1261      relocations referencing the symbol.  */
1262   unsigned relocs32, relocsfd, relocsfdv;
1263 
1264   /* The number of .rofixups entries and dynamic relocations allocated
1265      for this symbol, minus any that might have already been used.  */
1266   unsigned fixups, dynrelocs;
1267 
1268   /* The offsets of the GOT entries assigned to symbol+addend, to the
1269      function descriptor's address, and to a function descriptor,
1270      respectively.  Should be zero if unassigned.  The offsets are
1271      counted from the value that will be assigned to the PIC register,
1272      not from the beginning of the .got section.  */
1273   bfd_signed_vma got_entry, fdgot_entry, fd_entry;
1274   /* The offsets of the PLT entries assigned to symbol+addend,
1275      non-lazy and lazy, respectively.  If unassigned, should be
1276      (bfd_vma)-1.  */
1277   bfd_vma plt_entry, lzplt_entry;
1278 };
1279 
1280 /* Compute a hash with the key fields of an bfinfdpic_relocs_info entry.  */
1281 static hashval_t
bfinfdpic_relocs_info_hash(const void * entry_)1282 bfinfdpic_relocs_info_hash (const void *entry_)
1283 {
1284   const struct bfinfdpic_relocs_info *entry = entry_;
1285 
1286   return (entry->symndx == -1
1287 	  ? (long) entry->d.h->root.root.hash
1288 	  : entry->symndx + (long) entry->d.abfd->id * 257) + entry->addend;
1289 }
1290 
1291 /* Test whether the key fields of two bfinfdpic_relocs_info entries are
1292    identical.  */
1293 static int
bfinfdpic_relocs_info_eq(const void * entry1,const void * entry2)1294 bfinfdpic_relocs_info_eq (const void *entry1, const void *entry2)
1295 {
1296   const struct bfinfdpic_relocs_info *e1 = entry1;
1297   const struct bfinfdpic_relocs_info *e2 = entry2;
1298 
1299   return e1->symndx == e2->symndx && e1->addend == e2->addend
1300     && (e1->symndx == -1 ? e1->d.h == e2->d.h : e1->d.abfd == e2->d.abfd);
1301 }
1302 
1303 /* Find or create an entry in a hash table HT that matches the key
1304    fields of the given ENTRY.  If it's not found, memory for a new
1305    entry is allocated in ABFD's obstack.  */
1306 static struct bfinfdpic_relocs_info *
bfinfdpic_relocs_info_find(struct htab * ht,bfd * abfd,const struct bfinfdpic_relocs_info * entry,enum insert_option insert)1307 bfinfdpic_relocs_info_find (struct htab *ht,
1308 			   bfd *abfd,
1309 			   const struct bfinfdpic_relocs_info *entry,
1310 			   enum insert_option insert)
1311 {
1312   struct bfinfdpic_relocs_info **loc =
1313     (struct bfinfdpic_relocs_info **) htab_find_slot (ht, entry, insert);
1314 
1315   if (! loc)
1316     return NULL;
1317 
1318   if (*loc)
1319     return *loc;
1320 
1321   *loc = bfd_zalloc (abfd, sizeof (**loc));
1322 
1323   if (! *loc)
1324     return *loc;
1325 
1326   (*loc)->symndx = entry->symndx;
1327   (*loc)->d = entry->d;
1328   (*loc)->addend = entry->addend;
1329   (*loc)->plt_entry = (bfd_vma)-1;
1330   (*loc)->lzplt_entry = (bfd_vma)-1;
1331 
1332   return *loc;
1333 }
1334 
1335 /* Obtain the address of the entry in HT associated with H's symbol +
1336    addend, creating a new entry if none existed.  ABFD is only used
1337    for memory allocation purposes.  */
1338 inline static struct bfinfdpic_relocs_info *
bfinfdpic_relocs_info_for_global(struct htab * ht,bfd * abfd,struct elf_link_hash_entry * h,bfd_vma addend,enum insert_option insert)1339 bfinfdpic_relocs_info_for_global (struct htab *ht,
1340 				 bfd *abfd,
1341 				 struct elf_link_hash_entry *h,
1342 				 bfd_vma addend,
1343 				 enum insert_option insert)
1344 {
1345   struct bfinfdpic_relocs_info entry;
1346 
1347   entry.symndx = -1;
1348   entry.d.h = h;
1349   entry.addend = addend;
1350 
1351   return bfinfdpic_relocs_info_find (ht, abfd, &entry, insert);
1352 }
1353 
1354 /* Obtain the address of the entry in HT associated with the SYMNDXth
1355    local symbol of the input bfd ABFD, plus the addend, creating a new
1356    entry if none existed.  */
1357 inline static struct bfinfdpic_relocs_info *
bfinfdpic_relocs_info_for_local(struct htab * ht,bfd * abfd,long symndx,bfd_vma addend,enum insert_option insert)1358 bfinfdpic_relocs_info_for_local (struct htab *ht,
1359 				bfd *abfd,
1360 				long symndx,
1361 				bfd_vma addend,
1362 				enum insert_option insert)
1363 {
1364   struct bfinfdpic_relocs_info entry;
1365 
1366   entry.symndx = symndx;
1367   entry.d.abfd = abfd;
1368   entry.addend = addend;
1369 
1370   return bfinfdpic_relocs_info_find (ht, abfd, &entry, insert);
1371 }
1372 
1373 /* Merge fields set by check_relocs() of two entries that end up being
1374    mapped to the same (presumably global) symbol.  */
1375 
1376 inline static void
bfinfdpic_pic_merge_early_relocs_info(struct bfinfdpic_relocs_info * e2,struct bfinfdpic_relocs_info const * e1)1377 bfinfdpic_pic_merge_early_relocs_info (struct bfinfdpic_relocs_info *e2,
1378 				      struct bfinfdpic_relocs_info const *e1)
1379 {
1380   e2->got17m4 |= e1->got17m4;
1381   e2->gothilo |= e1->gothilo;
1382   e2->fd |= e1->fd;
1383   e2->fdgot17m4 |= e1->fdgot17m4;
1384   e2->fdgothilo |= e1->fdgothilo;
1385   e2->fdgoff17m4 |= e1->fdgoff17m4;
1386   e2->fdgoffhilo |= e1->fdgoffhilo;
1387   e2->gotoff |= e1->gotoff;
1388   e2->call |= e1->call;
1389   e2->sym |= e1->sym;
1390 }
1391 
1392 /* Every block of 65535 lazy PLT entries shares a single call to the
1393    resolver, inserted in the 32768th lazy PLT entry (i.e., entry #
1394    32767, counting from 0).  All other lazy PLT entries branch to it
1395    in a single instruction.  */
1396 
1397 #define LZPLT_RESOLVER_EXTRA 10
1398 #define LZPLT_NORMAL_SIZE 6
1399 #define LZPLT_ENTRIES 1362
1400 
1401 #define BFINFDPIC_LZPLT_BLOCK_SIZE ((bfd_vma) LZPLT_NORMAL_SIZE * LZPLT_ENTRIES + LZPLT_RESOLVER_EXTRA)
1402 #define BFINFDPIC_LZPLT_RESOLV_LOC (LZPLT_NORMAL_SIZE * LZPLT_ENTRIES / 2)
1403 
1404 /* Add a dynamic relocation to the SRELOC section.  */
1405 
1406 inline static bfd_vma
_bfinfdpic_add_dyn_reloc(bfd * output_bfd,asection * sreloc,bfd_vma offset,int reloc_type,long dynindx,bfd_vma addend,struct bfinfdpic_relocs_info * entry)1407 _bfinfdpic_add_dyn_reloc (bfd *output_bfd, asection *sreloc, bfd_vma offset,
1408 			 int reloc_type, long dynindx, bfd_vma addend,
1409 			 struct bfinfdpic_relocs_info *entry)
1410 {
1411   Elf_Internal_Rela outrel;
1412   bfd_vma reloc_offset;
1413 
1414   outrel.r_offset = offset;
1415   outrel.r_info = ELF32_R_INFO (dynindx, reloc_type);
1416   outrel.r_addend = addend;
1417 
1418   reloc_offset = sreloc->reloc_count * sizeof (Elf32_External_Rel);
1419   BFD_ASSERT (reloc_offset < sreloc->size);
1420   bfd_elf32_swap_reloc_out (output_bfd, &outrel,
1421 			    sreloc->contents + reloc_offset);
1422   sreloc->reloc_count++;
1423 
1424   /* If the entry's index is zero, this relocation was probably to a
1425      linkonce section that got discarded.  We reserved a dynamic
1426      relocation, but it was for another entry than the one we got at
1427      the time of emitting the relocation.  Unfortunately there's no
1428      simple way for us to catch this situation, since the relocation
1429      is cleared right before calling relocate_section, at which point
1430      we no longer know what the relocation used to point to.  */
1431   if (entry->symndx)
1432     {
1433       BFD_ASSERT (entry->dynrelocs > 0);
1434       entry->dynrelocs--;
1435     }
1436 
1437   return reloc_offset;
1438 }
1439 
1440 /* Add a fixup to the ROFIXUP section.  */
1441 
1442 static bfd_vma
_bfinfdpic_add_rofixup(bfd * output_bfd,asection * rofixup,bfd_vma offset,struct bfinfdpic_relocs_info * entry)1443 _bfinfdpic_add_rofixup (bfd *output_bfd, asection *rofixup, bfd_vma offset,
1444 		       struct bfinfdpic_relocs_info *entry)
1445 {
1446   bfd_vma fixup_offset;
1447 
1448   if (rofixup->flags & SEC_EXCLUDE)
1449     return -1;
1450 
1451   fixup_offset = rofixup->reloc_count * 4;
1452   if (rofixup->contents)
1453     {
1454       BFD_ASSERT (fixup_offset < rofixup->size);
1455       bfd_put_32 (output_bfd, offset, rofixup->contents + fixup_offset);
1456     }
1457   rofixup->reloc_count++;
1458 
1459   if (entry && entry->symndx)
1460     {
1461       /* See discussion about symndx == 0 in _bfinfdpic_add_dyn_reloc
1462 	 above.  */
1463       BFD_ASSERT (entry->fixups > 0);
1464       entry->fixups--;
1465     }
1466 
1467   return fixup_offset;
1468 }
1469 
1470 /* Find the segment number in which OSEC, and output section, is
1471    located.  */
1472 
1473 static unsigned
_bfinfdpic_osec_to_segment(bfd * output_bfd,asection * osec)1474 _bfinfdpic_osec_to_segment (bfd *output_bfd, asection *osec)
1475 {
1476   struct elf_segment_map *m;
1477   Elf_Internal_Phdr *p;
1478 
1479   /* Find the segment that contains the output_section.  */
1480   for (m = elf_tdata (output_bfd)->segment_map,
1481 	 p = elf_tdata (output_bfd)->phdr;
1482        m != NULL;
1483        m = m->next, p++)
1484     {
1485       int i;
1486 
1487       for (i = m->count - 1; i >= 0; i--)
1488 	if (m->sections[i] == osec)
1489 	  break;
1490 
1491       if (i >= 0)
1492 	break;
1493     }
1494 
1495   return p - elf_tdata (output_bfd)->phdr;
1496 }
1497 
1498 inline static bfd_boolean
_bfinfdpic_osec_readonly_p(bfd * output_bfd,asection * osec)1499 _bfinfdpic_osec_readonly_p (bfd *output_bfd, asection *osec)
1500 {
1501   unsigned seg = _bfinfdpic_osec_to_segment (output_bfd, osec);
1502 
1503   return ! (elf_tdata (output_bfd)->phdr[seg].p_flags & PF_W);
1504 }
1505 
1506 /* Generate relocations for GOT entries, function descriptors, and
1507    code for PLT and lazy PLT entries.  */
1508 
1509 inline static bfd_boolean
_bfinfdpic_emit_got_relocs_plt_entries(struct bfinfdpic_relocs_info * entry,bfd * output_bfd,struct bfd_link_info * info,asection * sec,Elf_Internal_Sym * sym,bfd_vma addend)1510 _bfinfdpic_emit_got_relocs_plt_entries (struct bfinfdpic_relocs_info *entry,
1511 					bfd *output_bfd,
1512 					struct bfd_link_info *info,
1513 					asection *sec,
1514 					Elf_Internal_Sym *sym,
1515 					bfd_vma addend)
1516 
1517 {
1518   bfd_vma fd_lazy_rel_offset = (bfd_vma)-1;
1519   int dynindx = -1;
1520 
1521   if (entry->done)
1522     return TRUE;
1523   entry->done = 1;
1524 
1525   if (entry->got_entry || entry->fdgot_entry || entry->fd_entry)
1526     {
1527       /* If the symbol is dynamic, consider it for dynamic
1528 	 relocations, otherwise decay to section + offset.  */
1529       if (entry->symndx == -1 && entry->d.h->dynindx != -1)
1530 	dynindx = entry->d.h->dynindx;
1531       else
1532 	{
1533 	  if (sec->output_section
1534 	      && ! bfd_is_abs_section (sec->output_section)
1535 	      && ! bfd_is_und_section (sec->output_section))
1536 	    dynindx = elf_section_data (sec->output_section)->dynindx;
1537 	  else
1538 	    dynindx = 0;
1539 	}
1540     }
1541 
1542   /* Generate relocation for GOT entry pointing to the symbol.  */
1543   if (entry->got_entry)
1544     {
1545       int idx = dynindx;
1546       bfd_vma ad = addend;
1547 
1548       /* If the symbol is dynamic but binds locally, use
1549 	 section+offset.  */
1550       if (sec && (entry->symndx != -1
1551 		  || BFINFDPIC_SYM_LOCAL (info, entry->d.h)))
1552 	{
1553 	  if (entry->symndx == -1)
1554 	    ad += entry->d.h->root.u.def.value;
1555 	  else
1556 	    ad += sym->st_value;
1557 	  ad += sec->output_offset;
1558 	  if (sec->output_section && elf_section_data (sec->output_section))
1559 	    idx = elf_section_data (sec->output_section)->dynindx;
1560 	  else
1561 	    idx = 0;
1562 	}
1563 
1564       /* If we're linking an executable at a fixed address, we can
1565 	 omit the dynamic relocation as long as the symbol is local to
1566 	 this module.  */
1567       if (info->executable && !info->pie
1568 	  && (entry->symndx != -1
1569 	      || BFINFDPIC_SYM_LOCAL (info, entry->d.h)))
1570 	{
1571 	  if (sec)
1572 	    ad += sec->output_section->vma;
1573 	  if (entry->symndx != -1
1574 	      || entry->d.h->root.type != bfd_link_hash_undefweak)
1575 	    _bfinfdpic_add_rofixup (output_bfd,
1576 				   bfinfdpic_gotfixup_section (info),
1577 				   bfinfdpic_got_section (info)->output_section
1578 				   ->vma
1579 				   + bfinfdpic_got_section (info)->output_offset
1580 				   + bfinfdpic_got_initial_offset (info)
1581 				   + entry->got_entry, entry);
1582 	}
1583       else
1584 	_bfinfdpic_add_dyn_reloc (output_bfd, bfinfdpic_gotrel_section (info),
1585 				 _bfd_elf_section_offset
1586 				 (output_bfd, info,
1587 				  bfinfdpic_got_section (info),
1588 				  bfinfdpic_got_initial_offset (info)
1589 				  + entry->got_entry)
1590 				 + bfinfdpic_got_section (info)
1591 				 ->output_section->vma
1592 				 + bfinfdpic_got_section (info)->output_offset,
1593 				 R_byte4_data, idx, ad, entry);
1594 
1595       bfd_put_32 (output_bfd, ad,
1596 		  bfinfdpic_got_section (info)->contents
1597 		  + bfinfdpic_got_initial_offset (info)
1598 		  + entry->got_entry);
1599     }
1600 
1601   /* Generate relocation for GOT entry pointing to a canonical
1602      function descriptor.  */
1603   if (entry->fdgot_entry)
1604     {
1605       int reloc, idx;
1606       bfd_vma ad = 0;
1607 
1608       if (! (entry->symndx == -1
1609 	     && entry->d.h->root.type == bfd_link_hash_undefweak
1610 	     && BFINFDPIC_SYM_LOCAL (info, entry->d.h)))
1611 	{
1612 	  /* If the symbol is dynamic and there may be dynamic symbol
1613 	     resolution because we are, or are linked with, a shared
1614 	     library, emit a FUNCDESC relocation such that the dynamic
1615 	     linker will allocate the function descriptor.  If the
1616 	     symbol needs a non-local function descriptor but binds
1617 	     locally (e.g., its visibility is protected, emit a
1618 	     dynamic relocation decayed to section+offset.  */
1619 	  if (entry->symndx == -1
1620 	      && ! BFINFDPIC_FUNCDESC_LOCAL (info, entry->d.h)
1621 	      && BFINFDPIC_SYM_LOCAL (info, entry->d.h)
1622 	      && !(info->executable && !info->pie))
1623 	    {
1624 	      reloc = R_BFIN_FUNCDESC;
1625 	      idx = elf_section_data (entry->d.h->root.u.def.section
1626 				      ->output_section)->dynindx;
1627 	      ad = entry->d.h->root.u.def.section->output_offset
1628 		+ entry->d.h->root.u.def.value;
1629 	    }
1630 	  else if (entry->symndx == -1
1631 		   && ! BFINFDPIC_FUNCDESC_LOCAL (info, entry->d.h))
1632 	    {
1633 	      reloc = R_BFIN_FUNCDESC;
1634 	      idx = dynindx;
1635 	      ad = addend;
1636 	      if (ad)
1637 		return FALSE;
1638 	    }
1639 	  else
1640 	    {
1641 	      /* Otherwise, we know we have a private function descriptor,
1642 		 so reference it directly.  */
1643 	      if (elf_hash_table (info)->dynamic_sections_created)
1644 		BFD_ASSERT (entry->privfd);
1645 	      reloc = R_byte4_data;
1646 	      idx = elf_section_data (bfinfdpic_got_section (info)
1647 				      ->output_section)->dynindx;
1648 	      ad = bfinfdpic_got_section (info)->output_offset
1649 		+ bfinfdpic_got_initial_offset (info) + entry->fd_entry;
1650 	    }
1651 
1652 	  /* If there is room for dynamic symbol resolution, emit the
1653 	     dynamic relocation.  However, if we're linking an
1654 	     executable at a fixed location, we won't have emitted a
1655 	     dynamic symbol entry for the got section, so idx will be
1656 	     zero, which means we can and should compute the address
1657 	     of the private descriptor ourselves.  */
1658 	  if (info->executable && !info->pie
1659 	      && (entry->symndx != -1
1660 		  || BFINFDPIC_FUNCDESC_LOCAL (info, entry->d.h)))
1661 	    {
1662 	      ad += bfinfdpic_got_section (info)->output_section->vma;
1663 	      _bfinfdpic_add_rofixup (output_bfd,
1664 				     bfinfdpic_gotfixup_section (info),
1665 				     bfinfdpic_got_section (info)
1666 				     ->output_section->vma
1667 				     + bfinfdpic_got_section (info)
1668 				     ->output_offset
1669 				     + bfinfdpic_got_initial_offset (info)
1670 				     + entry->fdgot_entry, entry);
1671 	    }
1672 	  else
1673 	    _bfinfdpic_add_dyn_reloc (output_bfd,
1674 				     bfinfdpic_gotrel_section (info),
1675 				     _bfd_elf_section_offset
1676 				     (output_bfd, info,
1677 				      bfinfdpic_got_section (info),
1678 				      bfinfdpic_got_initial_offset (info)
1679 				      + entry->fdgot_entry)
1680 				     + bfinfdpic_got_section (info)
1681 				     ->output_section->vma
1682 				     + bfinfdpic_got_section (info)
1683 				     ->output_offset,
1684 				     reloc, idx, ad, entry);
1685 	}
1686 
1687       bfd_put_32 (output_bfd, ad,
1688 		  bfinfdpic_got_section (info)->contents
1689 		  + bfinfdpic_got_initial_offset (info)
1690 		  + entry->fdgot_entry);
1691     }
1692 
1693   /* Generate relocation to fill in a private function descriptor in
1694      the GOT.  */
1695   if (entry->fd_entry)
1696     {
1697       int idx = dynindx;
1698       bfd_vma ad = addend;
1699       bfd_vma ofst;
1700       long lowword, highword;
1701 
1702       /* If the symbol is dynamic but binds locally, use
1703 	 section+offset.  */
1704       if (sec && (entry->symndx != -1
1705 		  || BFINFDPIC_SYM_LOCAL (info, entry->d.h)))
1706 	{
1707 	  if (entry->symndx == -1)
1708 	    ad += entry->d.h->root.u.def.value;
1709 	  else
1710 	    ad += sym->st_value;
1711 	  ad += sec->output_offset;
1712 	  if (sec->output_section && elf_section_data (sec->output_section))
1713 	    idx = elf_section_data (sec->output_section)->dynindx;
1714 	  else
1715 	    idx = 0;
1716 	}
1717 
1718       /* If we're linking an executable at a fixed address, we can
1719 	 omit the dynamic relocation as long as the symbol is local to
1720 	 this module.  */
1721       if (info->executable && !info->pie
1722 	  && (entry->symndx != -1 || BFINFDPIC_SYM_LOCAL (info, entry->d.h)))
1723 	{
1724 	  if (sec)
1725 	    ad += sec->output_section->vma;
1726 	  ofst = 0;
1727 	  if (entry->symndx != -1
1728 	      || entry->d.h->root.type != bfd_link_hash_undefweak)
1729 	    {
1730 	      _bfinfdpic_add_rofixup (output_bfd,
1731 				     bfinfdpic_gotfixup_section (info),
1732 				     bfinfdpic_got_section (info)
1733 				     ->output_section->vma
1734 				     + bfinfdpic_got_section (info)
1735 				     ->output_offset
1736 				     + bfinfdpic_got_initial_offset (info)
1737 				     + entry->fd_entry, entry);
1738 	      _bfinfdpic_add_rofixup (output_bfd,
1739 				     bfinfdpic_gotfixup_section (info),
1740 				     bfinfdpic_got_section (info)
1741 				     ->output_section->vma
1742 				     + bfinfdpic_got_section (info)
1743 				     ->output_offset
1744 				     + bfinfdpic_got_initial_offset (info)
1745 				     + entry->fd_entry + 4, entry);
1746 	    }
1747 	}
1748       else
1749 	{
1750 	  ofst
1751 	    = _bfinfdpic_add_dyn_reloc (output_bfd,
1752 					entry->lazyplt
1753 					? bfinfdpic_pltrel_section (info)
1754 					: bfinfdpic_gotrel_section (info),
1755 					_bfd_elf_section_offset
1756 					(output_bfd, info,
1757 					 bfinfdpic_got_section (info),
1758 					 bfinfdpic_got_initial_offset (info)
1759 					 + entry->fd_entry)
1760 					+ bfinfdpic_got_section (info)
1761 					->output_section->vma
1762 					+ bfinfdpic_got_section (info)
1763 					->output_offset,
1764 					R_BFIN_FUNCDESC_VALUE, idx, ad, entry);
1765 	}
1766 
1767       /* If we've omitted the dynamic relocation, just emit the fixed
1768 	 addresses of the symbol and of the local GOT base offset.  */
1769       if (info->executable && !info->pie && sec && sec->output_section)
1770 	{
1771 	  lowword = ad;
1772 	  highword = bfinfdpic_got_section (info)->output_section->vma
1773 	    + bfinfdpic_got_section (info)->output_offset
1774 	    + bfinfdpic_got_initial_offset (info);
1775 	}
1776       else if (entry->lazyplt)
1777 	{
1778 	  if (ad)
1779 	    return FALSE;
1780 
1781 	  fd_lazy_rel_offset = ofst;
1782 
1783 	  /* A function descriptor used for lazy or local resolving is
1784 	     initialized such that its high word contains the output
1785 	     section index in which the PLT entries are located, and
1786 	     the low word contains the address of the lazy PLT entry
1787 	     entry point, that must be within the memory region
1788 	     assigned to that section.  */
1789 	  lowword = entry->lzplt_entry + 4
1790 	    + bfinfdpic_plt_section (info)->output_offset
1791 	    + bfinfdpic_plt_section (info)->output_section->vma;
1792 	  highword = _bfinfdpic_osec_to_segment
1793 	    (output_bfd, bfinfdpic_plt_section (info)->output_section);
1794 	}
1795       else
1796 	{
1797 	  /* A function descriptor for a local function gets the index
1798 	     of the section.  For a non-local function, it's
1799 	     disregarded.  */
1800 	  lowword = ad;
1801 	  if (entry->symndx == -1 && entry->d.h->dynindx != -1
1802 	      && entry->d.h->dynindx == idx)
1803 	    highword = 0;
1804 	  else
1805 	    highword = _bfinfdpic_osec_to_segment
1806 	      (output_bfd, sec->output_section);
1807 	}
1808 
1809       bfd_put_32 (output_bfd, lowword,
1810 		  bfinfdpic_got_section (info)->contents
1811 		  + bfinfdpic_got_initial_offset (info)
1812 		  + entry->fd_entry);
1813       bfd_put_32 (output_bfd, highword,
1814 		  bfinfdpic_got_section (info)->contents
1815 		  + bfinfdpic_got_initial_offset (info)
1816 		  + entry->fd_entry + 4);
1817     }
1818 
1819   /* Generate code for the PLT entry.  */
1820   if (entry->plt_entry != (bfd_vma) -1)
1821     {
1822       bfd_byte *plt_code = bfinfdpic_plt_section (info)->contents
1823 	+ entry->plt_entry;
1824 
1825       BFD_ASSERT (entry->fd_entry);
1826 
1827       /* Figure out what kind of PLT entry we need, depending on the
1828 	 location of the function descriptor within the GOT.  */
1829       if (entry->fd_entry >= -(1 << (18 - 1))
1830 	  && entry->fd_entry + 4 < (1 << (18 - 1)))
1831 	{
1832 	  /* P1 = [P3 + fd_entry]; P3 = [P3 + fd_entry + 4] */
1833 	  bfd_put_32 (output_bfd,
1834 		      0xe519 | ((entry->fd_entry << 14) & 0xFFFF0000),
1835 		      plt_code);
1836 	  bfd_put_32 (output_bfd,
1837 		      0xe51b | (((entry->fd_entry + 4) << 14) & 0xFFFF0000),
1838 		      plt_code + 4);
1839 	  plt_code += 8;
1840 	}
1841       else
1842 	{
1843 	  /* P1.L = fd_entry; P1.H = fd_entry;
1844 	     P3 = P3 + P1;
1845 	     P1 = [P3];
1846 	     P3 = [P3 + 4];  */
1847 	  bfd_put_32 (output_bfd,
1848 		      0xe109 | (entry->fd_entry << 16),
1849 		      plt_code);
1850 	  bfd_put_32 (output_bfd,
1851 		      0xe149 | (entry->fd_entry & 0xFFFF0000),
1852 		      plt_code + 4);
1853 	  bfd_put_16 (output_bfd, 0x5ad9, plt_code + 8);
1854 	  bfd_put_16 (output_bfd, 0x9159, plt_code + 10);
1855 	  bfd_put_16 (output_bfd, 0xac5b, plt_code + 12);
1856 	  plt_code += 14;
1857 	}
1858       /* JUMP (P1) */
1859       bfd_put_16 (output_bfd, 0x0051, plt_code);
1860     }
1861 
1862   /* Generate code for the lazy PLT entry.  */
1863   if (entry->lzplt_entry != (bfd_vma) -1)
1864     {
1865       bfd_byte *lzplt_code = bfinfdpic_plt_section (info)->contents
1866 	+ entry->lzplt_entry;
1867       bfd_vma resolverStub_addr;
1868 
1869       bfd_put_32 (output_bfd, fd_lazy_rel_offset, lzplt_code);
1870       lzplt_code += 4;
1871 
1872       resolverStub_addr = entry->lzplt_entry / BFINFDPIC_LZPLT_BLOCK_SIZE
1873 	* BFINFDPIC_LZPLT_BLOCK_SIZE + BFINFDPIC_LZPLT_RESOLV_LOC;
1874       if (resolverStub_addr >= bfinfdpic_plt_initial_offset (info))
1875 	resolverStub_addr = bfinfdpic_plt_initial_offset (info) - LZPLT_NORMAL_SIZE - LZPLT_RESOLVER_EXTRA;
1876 
1877       if (entry->lzplt_entry == resolverStub_addr)
1878 	{
1879 	  /* This is a lazy PLT entry that includes a resolver call.
1880 	     P2 = [P3];
1881 	     R3 = [P3 + 4];
1882 	     JUMP (P2);  */
1883 	  bfd_put_32 (output_bfd,
1884 		      0xa05b915a,
1885 		      lzplt_code);
1886 	  bfd_put_16 (output_bfd, 0x0052, lzplt_code + 4);
1887 	}
1888       else
1889 	{
1890 	  /* JUMP.S  resolverStub */
1891 	  bfd_put_16 (output_bfd,
1892 		      0x2000
1893 		      | (((resolverStub_addr - entry->lzplt_entry)
1894 			  / 2) & (((bfd_vma)1 << 12) - 1)),
1895 		      lzplt_code);
1896 	}
1897     }
1898 
1899   return TRUE;
1900 }
1901 
1902 
1903 /* Look through the relocs for a section during the first phase, and
1904    allocate space in the global offset table or procedure linkage
1905    table.  */
1906 
1907 static bfd_boolean
bfin_check_relocs(bfd * abfd,struct bfd_link_info * info,asection * sec,const Elf_Internal_Rela * relocs)1908 bfin_check_relocs (bfd * abfd,
1909 		   struct bfd_link_info *info,
1910 		   asection *sec,
1911                    const Elf_Internal_Rela *relocs)
1912 {
1913   bfd *dynobj;
1914   Elf_Internal_Shdr *symtab_hdr;
1915   struct elf_link_hash_entry **sym_hashes;
1916   bfd_signed_vma *local_got_refcounts;
1917   const Elf_Internal_Rela *rel;
1918   const Elf_Internal_Rela *rel_end;
1919   asection *sgot;
1920   asection *srelgot;
1921   asection *sreloc;
1922   if (info->relocatable)
1923     return TRUE;
1924 
1925   dynobj = elf_hash_table (info)->dynobj;
1926   symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1927   sym_hashes = elf_sym_hashes (abfd);
1928   local_got_refcounts = elf_local_got_refcounts (abfd);
1929 
1930   sgot = NULL;
1931   srelgot = NULL;
1932   sreloc = NULL;
1933 
1934   rel_end = relocs + sec->reloc_count;
1935   for (rel = relocs; rel < rel_end; rel++)
1936     {
1937       unsigned long r_symndx;
1938       struct elf_link_hash_entry *h;
1939 
1940       r_symndx = ELF32_R_SYM (rel->r_info);
1941       if (r_symndx < symtab_hdr->sh_info)
1942 	h = NULL;
1943       else
1944 	h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1945 
1946       switch (ELF32_R_TYPE (rel->r_info))
1947 	{
1948        /* This relocation describes the C++ object vtable hierarchy.
1949            Reconstruct it for later use during GC.  */
1950         case R_BFIN_GNU_VTINHERIT:
1951           if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
1952             return FALSE;
1953           break;
1954 
1955         /* This relocation describes which C++ vtable entries
1956            are actually used.  Record for later use during GC.  */
1957         case R_BFIN_GNU_VTENTRY:
1958           if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
1959             return FALSE;
1960           break;
1961 
1962 	case R_got:
1963 	  if (h != NULL
1964 	      && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
1965 	    break;
1966 	  /* Fall through.  */
1967 
1968 	  if (dynobj == NULL)
1969 	    {
1970 	      /* Create the .got section.  */
1971 	      elf_hash_table (info)->dynobj = dynobj = abfd;
1972 	      if (!_bfd_elf_create_got_section (dynobj, info))
1973 		return FALSE;
1974 	    }
1975 
1976 	  if (sgot == NULL)
1977 	    {
1978 	      sgot = bfd_get_section_by_name (dynobj, ".got");
1979 	      BFD_ASSERT (sgot != NULL);
1980 	    }
1981 
1982 	  if (srelgot == NULL && (h != NULL || info->shared))
1983 	    {
1984 	      srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
1985 	      if (srelgot == NULL)
1986 		{
1987 		  srelgot = bfd_make_section (dynobj, ".rela.got");
1988 		  if (srelgot == NULL
1989 		      || !bfd_set_section_flags (dynobj, srelgot,
1990 						 (SEC_ALLOC
1991 						  | SEC_LOAD
1992 						  | SEC_HAS_CONTENTS
1993 						  | SEC_IN_MEMORY
1994 						  | SEC_LINKER_CREATED
1995 						  | SEC_READONLY))
1996 		      || !bfd_set_section_alignment (dynobj, srelgot, 2))
1997 		    return FALSE;
1998 		}
1999 	    }
2000 
2001 	  if (h != NULL)
2002 	    {
2003 	      if (h->got.refcount == 0)
2004 		{
2005 		  /* Make sure this symbol is output as a dynamic symbol.  */
2006 		  if (h->dynindx == -1 && !h->forced_local)
2007 		    {
2008 		      if (!bfd_elf_link_record_dynamic_symbol (info, h))
2009 			return FALSE;
2010 		    }
2011 
2012 		  /* Allocate space in the .got section.  */
2013 		  sgot->size += 4;
2014 		  /* Allocate relocation space.  */
2015 		  srelgot->size += sizeof (Elf32_External_Rela);
2016 		}
2017 	      h->got.refcount++;
2018 	    }
2019 	  else
2020 	    {
2021 	      /* This is a global offset table entry for a local symbol.  */
2022 	      if (local_got_refcounts == NULL)
2023 		{
2024 		  bfd_size_type size;
2025 
2026 		  size = symtab_hdr->sh_info;
2027 		  size *= sizeof (bfd_signed_vma);
2028 		  local_got_refcounts = ((bfd_signed_vma *)
2029 					 bfd_zalloc (abfd, size));
2030 		  if (local_got_refcounts == NULL)
2031 		    return FALSE;
2032 		  elf_local_got_refcounts (abfd) = local_got_refcounts;
2033 		}
2034 	      if (local_got_refcounts[r_symndx] == 0)
2035 		{
2036 		  sgot->size += 4;
2037 		  if (info->shared)
2038 		    {
2039 		      /* If we are generating a shared object, we need to
2040 		         output a R_68K_RELATIVE reloc so that the dynamic
2041 		         linker can adjust this GOT entry.  */
2042 		      srelgot->size += sizeof (Elf32_External_Rela);
2043 		    }
2044 		}
2045 	      local_got_refcounts[r_symndx]++;
2046 	    }
2047 	  break;
2048 
2049 	default:
2050 	  break;
2051 	}
2052     }
2053 
2054   return TRUE;
2055 }
2056 
2057 static enum elf_reloc_type_class
elf32_bfin_reloc_type_class(const Elf_Internal_Rela * rela)2058 elf32_bfin_reloc_type_class (const Elf_Internal_Rela * rela)
2059 {
2060   switch ((int) ELF32_R_TYPE (rela->r_info))
2061     {
2062     default:
2063       return reloc_class_normal;
2064     }
2065 }
2066 
2067 /* Relocate an Blackfin ELF section.
2068 
2069    The RELOCATE_SECTION function is called by the new ELF backend linker
2070    to handle the relocations for a section.
2071 
2072    The relocs are always passed as Rela structures; if the section
2073    actually uses Rel structures, the r_addend field will always be
2074    zero.
2075 
2076    This function is responsible for adjusting the section contents as
2077    necessary, and (if using Rela relocs and generating a relocatable
2078    output file) adjusting the reloc addend as necessary.
2079 
2080    This function does not have to worry about setting the reloc
2081    address or the reloc symbol index.
2082 
2083    LOCAL_SYMS is a pointer to the swapped in local symbols.
2084 
2085    LOCAL_SECTIONS is an array giving the section in the input file
2086    corresponding to the st_shndx field of each local symbol.
2087 
2088    The global hash table entry for the global symbols can be found
2089    via elf_sym_hashes (input_bfd).
2090 
2091    When generating relocatable output, this function must handle
2092    STB_LOCAL/STT_SECTION symbols specially.  The output symbol is
2093    going to be the section symbol corresponding to the output
2094    section, which means that the addend must be adjusted
2095    accordingly.  */
2096 
2097 static bfd_boolean
bfinfdpic_relocate_section(bfd * output_bfd,struct bfd_link_info * info,bfd * input_bfd,asection * input_section,bfd_byte * contents,Elf_Internal_Rela * relocs,Elf_Internal_Sym * local_syms,asection ** local_sections)2098 bfinfdpic_relocate_section (bfd * output_bfd,
2099 			    struct bfd_link_info *info,
2100 			    bfd * input_bfd,
2101 			    asection * input_section,
2102 			    bfd_byte * contents,
2103 			    Elf_Internal_Rela * relocs,
2104 			    Elf_Internal_Sym * local_syms,
2105 			    asection ** local_sections)
2106 {
2107   Elf_Internal_Shdr *symtab_hdr;
2108   struct elf_link_hash_entry **sym_hashes;
2109   Elf_Internal_Rela *rel;
2110   Elf_Internal_Rela *relend;
2111   unsigned isec_segment, got_segment, plt_segment,
2112     check_segment[2];
2113   int silence_segment_error = !(info->shared || info->pie);
2114 
2115   if (info->relocatable)
2116     return TRUE;
2117 
2118   symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
2119   sym_hashes = elf_sym_hashes (input_bfd);
2120   relend     = relocs + input_section->reloc_count;
2121 
2122   isec_segment = _bfinfdpic_osec_to_segment (output_bfd,
2123 					     input_section->output_section);
2124   if (IS_FDPIC (output_bfd) && bfinfdpic_got_section (info))
2125     got_segment = _bfinfdpic_osec_to_segment (output_bfd,
2126 					      bfinfdpic_got_section (info)
2127 					      ->output_section);
2128   else
2129     got_segment = -1;
2130   if (IS_FDPIC (output_bfd) && elf_hash_table (info)->dynamic_sections_created)
2131     plt_segment = _bfinfdpic_osec_to_segment (output_bfd,
2132 					      bfinfdpic_plt_section (info)
2133 					      ->output_section);
2134   else
2135     plt_segment = -1;
2136 
2137   for (rel = relocs; rel < relend; rel ++)
2138     {
2139       reloc_howto_type *howto;
2140       unsigned long r_symndx;
2141       Elf_Internal_Sym *sym;
2142       asection *sec;
2143       struct elf_link_hash_entry *h;
2144       bfd_vma relocation;
2145       bfd_reloc_status_type r;
2146       const char * name = NULL;
2147       int r_type;
2148       asection *osec;
2149       struct bfinfdpic_relocs_info *picrel;
2150       bfd_vma orig_addend = rel->r_addend;
2151 
2152       r_type = ELF32_R_TYPE (rel->r_info);
2153 
2154       if (r_type == R_BFIN_GNU_VTINHERIT
2155 	  || r_type == R_BFIN_GNU_VTENTRY)
2156 	continue;
2157 
2158       /* This is a final link.  */
2159       r_symndx = ELF32_R_SYM (rel->r_info);
2160       howto = bfin_reloc_type_lookup (input_bfd, r_type);
2161       if (howto == NULL)
2162 	{
2163 	  bfd_set_error (bfd_error_bad_value);
2164 	  return FALSE;
2165 	}
2166 
2167       h      = NULL;
2168       sym    = NULL;
2169       sec    = NULL;
2170 
2171       if (r_symndx < symtab_hdr->sh_info)
2172 	{
2173 	  sym = local_syms + r_symndx;
2174 	  osec = sec = local_sections [r_symndx];
2175 	  relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
2176 
2177 	  name = bfd_elf_string_from_elf_section
2178 	    (input_bfd, symtab_hdr->sh_link, sym->st_name);
2179 	  name = (name == NULL) ? bfd_section_name (input_bfd, sec) : name;
2180 	}
2181       else
2182 	{
2183 	  h = sym_hashes [r_symndx - symtab_hdr->sh_info];
2184 
2185 	  while (h->root.type == bfd_link_hash_indirect
2186 		 || h->root.type == bfd_link_hash_warning)
2187 	    h = (struct elf_link_hash_entry *) h->root.u.i.link;
2188 
2189 	  name = h->root.root.string;
2190 
2191 	  if ((h->root.type == bfd_link_hash_defined
2192 	       || h->root.type == bfd_link_hash_defweak)
2193 	      && ! BFINFDPIC_SYM_LOCAL (info, h))
2194 	    {
2195 	      sec = NULL;
2196 	      relocation = 0;
2197 	    }
2198 	  else
2199 	    if (h->root.type == bfd_link_hash_defined
2200 		|| h->root.type == bfd_link_hash_defweak)
2201 	      {
2202 		sec = h->root.u.def.section;
2203 		relocation = (h->root.u.def.value
2204 			      + sec->output_section->vma
2205 			      + sec->output_offset);
2206 	      }
2207 	    else if (h->root.type == bfd_link_hash_undefweak)
2208 	      {
2209 		relocation = 0;
2210 	      }
2211 	    else if (info->unresolved_syms_in_objects == RM_IGNORE
2212 		     && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
2213 	      relocation = 0;
2214 	    else
2215 	      {
2216 		if (! ((*info->callbacks->undefined_symbol)
2217 		       (info, h->root.root.string, input_bfd,
2218 			input_section, rel->r_offset,
2219 			(info->unresolved_syms_in_objects == RM_GENERATE_ERROR
2220 			 || ELF_ST_VISIBILITY (h->other)))))
2221 		  return FALSE;
2222 		relocation = 0;
2223 	      }
2224 	  osec = sec;
2225 	}
2226 
2227       switch (r_type)
2228 	{
2229 	case R_pcrel24:
2230 	case R_pcrel24_jump_l:
2231 	case R_byte4_data:
2232 	  if (! IS_FDPIC (output_bfd))
2233 	    goto non_fdpic;
2234 
2235 	case R_BFIN_GOT17M4:
2236 	case R_BFIN_GOTHI:
2237 	case R_BFIN_GOTLO:
2238 	case R_BFIN_FUNCDESC_GOT17M4:
2239 	case R_BFIN_FUNCDESC_GOTHI:
2240 	case R_BFIN_FUNCDESC_GOTLO:
2241 	case R_BFIN_GOTOFF17M4:
2242 	case R_BFIN_GOTOFFHI:
2243 	case R_BFIN_GOTOFFLO:
2244 	case R_BFIN_FUNCDESC_GOTOFF17M4:
2245 	case R_BFIN_FUNCDESC_GOTOFFHI:
2246 	case R_BFIN_FUNCDESC_GOTOFFLO:
2247 	case R_BFIN_FUNCDESC:
2248 	case R_BFIN_FUNCDESC_VALUE:
2249 	  if (h != NULL)
2250 	    picrel = bfinfdpic_relocs_info_for_global (bfinfdpic_relocs_info
2251 						       (info), input_bfd, h,
2252 						       orig_addend, INSERT);
2253 	  else
2254 	    /* In order to find the entry we created before, we must
2255 	       use the original addend, not the one that may have been
2256 	       modified by _bfd_elf_rela_local_sym().  */
2257 	    picrel = bfinfdpic_relocs_info_for_local (bfinfdpic_relocs_info
2258 						      (info), input_bfd, r_symndx,
2259 						      orig_addend, INSERT);
2260 	  if (! picrel)
2261 	    return FALSE;
2262 
2263 	  if (!_bfinfdpic_emit_got_relocs_plt_entries (picrel, output_bfd, info,
2264 						       osec, sym,
2265 						       rel->r_addend))
2266 	    {
2267 	      (*_bfd_error_handler)
2268 		(_("%B: relocation at `%A+0x%x' references symbol `%s' with nonzero addend"),
2269 		 input_bfd, input_section, rel->r_offset, name);
2270 	      return FALSE;
2271 
2272 	    }
2273 
2274 	  break;
2275 
2276 	default:
2277 	non_fdpic:
2278 	  picrel = NULL;
2279 	  if (h && ! BFINFDPIC_SYM_LOCAL (info, h))
2280 	    {
2281 	      info->callbacks->warning
2282 		(info, _("relocation references symbol not defined in the module"),
2283 		 name, input_bfd, input_section, rel->r_offset);
2284 	      return FALSE;
2285 	    }
2286 	  break;
2287 	}
2288 
2289       switch (r_type)
2290 	{
2291 	case R_pcrel24:
2292 	case R_pcrel24_jump_l:
2293 	  check_segment[0] = isec_segment;
2294 	  if (! IS_FDPIC (output_bfd))
2295 	    check_segment[1] = isec_segment;
2296 	  else if (picrel->plt)
2297 	    {
2298 	      relocation = bfinfdpic_plt_section (info)->output_section->vma
2299 		+ bfinfdpic_plt_section (info)->output_offset
2300 		+ picrel->plt_entry;
2301 	      check_segment[1] = plt_segment;
2302 	    }
2303 	  /* We don't want to warn on calls to undefined weak symbols,
2304 	     as calls to them must be protected by non-NULL tests
2305 	     anyway, and unprotected calls would invoke undefined
2306 	     behavior.  */
2307 	  else if (picrel->symndx == -1
2308 		   && picrel->d.h->root.type == bfd_link_hash_undefweak)
2309 	    check_segment[1] = check_segment[0];
2310 	  else
2311 	    check_segment[1] = sec
2312 	      ? _bfinfdpic_osec_to_segment (output_bfd, sec->output_section)
2313 	      : (unsigned)-1;
2314 	  break;
2315 
2316 	case R_BFIN_GOT17M4:
2317 	case R_BFIN_GOTHI:
2318 	case R_BFIN_GOTLO:
2319 	  relocation = picrel->got_entry;
2320 	  check_segment[0] = check_segment[1] = got_segment;
2321 	  break;
2322 
2323 	case R_BFIN_FUNCDESC_GOT17M4:
2324 	case R_BFIN_FUNCDESC_GOTHI:
2325 	case R_BFIN_FUNCDESC_GOTLO:
2326 	  relocation = picrel->fdgot_entry;
2327 	  check_segment[0] = check_segment[1] = got_segment;
2328 	  break;
2329 
2330 	case R_BFIN_GOTOFFHI:
2331 	case R_BFIN_GOTOFF17M4:
2332 	case R_BFIN_GOTOFFLO:
2333 	  relocation -= bfinfdpic_got_section (info)->output_section->vma
2334 	    + bfinfdpic_got_section (info)->output_offset
2335 	    + bfinfdpic_got_initial_offset (info);
2336 	  check_segment[0] = got_segment;
2337 	  check_segment[1] = sec
2338 	    ? _bfinfdpic_osec_to_segment (output_bfd, sec->output_section)
2339 	    : (unsigned)-1;
2340 	  break;
2341 
2342 	case R_BFIN_FUNCDESC_GOTOFF17M4:
2343 	case R_BFIN_FUNCDESC_GOTOFFHI:
2344 	case R_BFIN_FUNCDESC_GOTOFFLO:
2345 	  relocation = picrel->fd_entry;
2346 	  check_segment[0] = check_segment[1] = got_segment;
2347 	  break;
2348 
2349 	case R_BFIN_FUNCDESC:
2350 	  {
2351 	    int dynindx;
2352 	    bfd_vma addend = rel->r_addend;
2353 
2354 	    if (! (h && h->root.type == bfd_link_hash_undefweak
2355 		   && BFINFDPIC_SYM_LOCAL (info, h)))
2356 	      {
2357 		/* If the symbol is dynamic and there may be dynamic
2358 		   symbol resolution because we are or are linked with a
2359 		   shared library, emit a FUNCDESC relocation such that
2360 		   the dynamic linker will allocate the function
2361 		   descriptor.  If the symbol needs a non-local function
2362 		   descriptor but binds locally (e.g., its visibility is
2363 		   protected, emit a dynamic relocation decayed to
2364 		   section+offset.  */
2365 		if (h && ! BFINFDPIC_FUNCDESC_LOCAL (info, h)
2366 		    && BFINFDPIC_SYM_LOCAL (info, h)
2367 		    && !(info->executable && !info->pie))
2368 		  {
2369 		    dynindx = elf_section_data (h->root.u.def.section
2370 						->output_section)->dynindx;
2371 		    addend += h->root.u.def.section->output_offset
2372 		      + h->root.u.def.value;
2373 		  }
2374 		else if (h && ! BFINFDPIC_FUNCDESC_LOCAL (info, h))
2375 		  {
2376 		    if (addend)
2377 		      {
2378 			info->callbacks->warning
2379 			  (info, _("R_BFIN_FUNCDESC references dynamic symbol with nonzero addend"),
2380 			   name, input_bfd, input_section, rel->r_offset);
2381 			return FALSE;
2382 		      }
2383 		    dynindx = h->dynindx;
2384 		  }
2385 		else
2386 		  {
2387 		    /* Otherwise, we know we have a private function
2388 		       descriptor, so reference it directly.  */
2389 		    BFD_ASSERT (picrel->privfd);
2390 		    r_type = R_byte4_data;
2391 		    dynindx = elf_section_data (bfinfdpic_got_section (info)
2392 						->output_section)->dynindx;
2393 		    addend = bfinfdpic_got_section (info)->output_offset
2394 		      + bfinfdpic_got_initial_offset (info)
2395 		      + picrel->fd_entry;
2396 		  }
2397 
2398 		/* If there is room for dynamic symbol resolution, emit
2399 		   the dynamic relocation.  However, if we're linking an
2400 		   executable at a fixed location, we won't have emitted a
2401 		   dynamic symbol entry for the got section, so idx will
2402 		   be zero, which means we can and should compute the
2403 		   address of the private descriptor ourselves.  */
2404 		if (info->executable && !info->pie
2405 		    && (!h || BFINFDPIC_FUNCDESC_LOCAL (info, h)))
2406 		  {
2407 		    addend += bfinfdpic_got_section (info)->output_section->vma;
2408 		    if ((bfd_get_section_flags (output_bfd,
2409 						input_section->output_section)
2410 			 & (SEC_ALLOC | SEC_LOAD)) == (SEC_ALLOC | SEC_LOAD))
2411 		      {
2412 			if (_bfinfdpic_osec_readonly_p (output_bfd,
2413 						       input_section
2414 						       ->output_section))
2415 			  {
2416 			    info->callbacks->warning
2417 			      (info,
2418 			       _("cannot emit fixups in read-only section"),
2419 			       name, input_bfd, input_section, rel->r_offset);
2420 			    return FALSE;
2421 			  }
2422 			_bfinfdpic_add_rofixup (output_bfd,
2423 					       bfinfdpic_gotfixup_section
2424 					       (info),
2425 					       _bfd_elf_section_offset
2426 					       (output_bfd, info,
2427 						input_section, rel->r_offset)
2428 					       + input_section
2429 					       ->output_section->vma
2430 					       + input_section->output_offset,
2431 					       picrel);
2432 		      }
2433 		  }
2434 		else if ((bfd_get_section_flags (output_bfd,
2435 						 input_section->output_section)
2436 			  & (SEC_ALLOC | SEC_LOAD)) == (SEC_ALLOC | SEC_LOAD))
2437 		  {
2438 		    if (_bfinfdpic_osec_readonly_p (output_bfd,
2439 						   input_section
2440 						   ->output_section))
2441 		      {
2442 			info->callbacks->warning
2443 			  (info,
2444 			   _("cannot emit dynamic relocations in read-only section"),
2445 			   name, input_bfd, input_section, rel->r_offset);
2446 			return FALSE;
2447 		      }
2448 		    _bfinfdpic_add_dyn_reloc (output_bfd,
2449 					      bfinfdpic_gotrel_section (info),
2450 					      _bfd_elf_section_offset
2451 					      (output_bfd, info,
2452 					       input_section, rel->r_offset)
2453 					      + input_section
2454 					      ->output_section->vma
2455 					      + input_section->output_offset,
2456 					      r_type, dynindx, addend, picrel);
2457 		  }
2458 		else
2459 		  addend += bfinfdpic_got_section (info)->output_section->vma;
2460 	      }
2461 
2462 	    /* We want the addend in-place because dynamic
2463 	       relocations are REL.  Setting relocation to it should
2464 	       arrange for it to be installed.  */
2465 	    relocation = addend - rel->r_addend;
2466 	  }
2467 	  check_segment[0] = check_segment[1] = got_segment;
2468 	  break;
2469 
2470 	case R_byte4_data:
2471 	  if (! IS_FDPIC (output_bfd))
2472 	    {
2473 	      check_segment[0] = check_segment[1] = -1;
2474 	      break;
2475 	    }
2476 	  /* Fall through.  */
2477 	case R_BFIN_FUNCDESC_VALUE:
2478 	  {
2479 	    int dynindx;
2480 	    bfd_vma addend = rel->r_addend;
2481 
2482 	    /* If the symbol is dynamic but binds locally, use
2483 	       section+offset.  */
2484 	    if (h && ! BFINFDPIC_SYM_LOCAL (info, h))
2485 	      {
2486 		if (addend && r_type == R_BFIN_FUNCDESC_VALUE)
2487 		  {
2488 		    info->callbacks->warning
2489 		      (info, _("R_BFIN_FUNCDESC_VALUE references dynamic symbol with nonzero addend"),
2490 		       name, input_bfd, input_section, rel->r_offset);
2491 		    return FALSE;
2492 		  }
2493 		dynindx = h->dynindx;
2494 	      }
2495 	    else
2496 	      {
2497 		if (h)
2498 		  addend += h->root.u.def.value;
2499 		else
2500 		  addend += sym->st_value;
2501 		if (osec)
2502 		  addend += osec->output_offset;
2503 		if (osec && osec->output_section
2504 		    && ! bfd_is_abs_section (osec->output_section)
2505 		    && ! bfd_is_und_section (osec->output_section))
2506 		  dynindx = elf_section_data (osec->output_section)->dynindx;
2507 		else
2508 		  dynindx = 0;
2509 	      }
2510 
2511 	    /* If we're linking an executable at a fixed address, we
2512 	       can omit the dynamic relocation as long as the symbol
2513 	       is defined in the current link unit (which is implied
2514 	       by its output section not being NULL).  */
2515 	    if (info->executable && !info->pie
2516 		&& (!h || BFINFDPIC_SYM_LOCAL (info, h)))
2517 	      {
2518 		if (osec)
2519 		  addend += osec->output_section->vma;
2520 		if (IS_FDPIC (input_bfd)
2521 		    && (bfd_get_section_flags (output_bfd,
2522 					       input_section->output_section)
2523 			& (SEC_ALLOC | SEC_LOAD)) == (SEC_ALLOC | SEC_LOAD))
2524 		  {
2525 		    if (_bfinfdpic_osec_readonly_p (output_bfd,
2526 						   input_section
2527 						   ->output_section))
2528 		      {
2529 			info->callbacks->warning
2530 			  (info,
2531 			   _("cannot emit fixups in read-only section"),
2532 			   name, input_bfd, input_section, rel->r_offset);
2533 			return FALSE;
2534 		      }
2535 		    if (!h || h->root.type != bfd_link_hash_undefweak)
2536 		      {
2537 			_bfinfdpic_add_rofixup (output_bfd,
2538 					       bfinfdpic_gotfixup_section
2539 					       (info),
2540 					       _bfd_elf_section_offset
2541 					       (output_bfd, info,
2542 						input_section, rel->r_offset)
2543 					       + input_section
2544 					       ->output_section->vma
2545 					       + input_section->output_offset,
2546 					       picrel);
2547 			if (r_type == R_BFIN_FUNCDESC_VALUE)
2548 			  _bfinfdpic_add_rofixup
2549 			    (output_bfd,
2550 			     bfinfdpic_gotfixup_section (info),
2551 			     _bfd_elf_section_offset
2552 			     (output_bfd, info,
2553 			      input_section, rel->r_offset)
2554 			     + input_section->output_section->vma
2555 			     + input_section->output_offset + 4, picrel);
2556 		      }
2557 		  }
2558 	      }
2559 	    else
2560 	      {
2561 		if ((bfd_get_section_flags (output_bfd,
2562 					    input_section->output_section)
2563 		     & (SEC_ALLOC | SEC_LOAD)) == (SEC_ALLOC | SEC_LOAD))
2564 		  {
2565 		    if (_bfinfdpic_osec_readonly_p (output_bfd,
2566 						   input_section
2567 						   ->output_section))
2568 		      {
2569 			info->callbacks->warning
2570 			  (info,
2571 			   _("cannot emit dynamic relocations in read-only section"),
2572 			   name, input_bfd, input_section, rel->r_offset);
2573 			return FALSE;
2574 		      }
2575 		    _bfinfdpic_add_dyn_reloc (output_bfd,
2576 					      bfinfdpic_gotrel_section (info),
2577 					      _bfd_elf_section_offset
2578 					      (output_bfd, info,
2579 					       input_section, rel->r_offset)
2580 					      + input_section
2581 					      ->output_section->vma
2582 					      + input_section->output_offset,
2583 					      r_type, dynindx, addend, picrel);
2584 		  }
2585 		else if (osec)
2586 		  addend += osec->output_section->vma;
2587 		/* We want the addend in-place because dynamic
2588 		   relocations are REL.  Setting relocation to it
2589 		   should arrange for it to be installed.  */
2590 		relocation = addend - rel->r_addend;
2591 	      }
2592 
2593 	    if (r_type == R_BFIN_FUNCDESC_VALUE)
2594 	      {
2595 		/* If we've omitted the dynamic relocation, just emit
2596 		   the fixed addresses of the symbol and of the local
2597 		   GOT base offset.  */
2598 		if (info->executable && !info->pie
2599 		    && (!h || BFINFDPIC_SYM_LOCAL (info, h)))
2600 		  bfd_put_32 (output_bfd,
2601 			      bfinfdpic_got_section (info)->output_section->vma
2602 			      + bfinfdpic_got_section (info)->output_offset
2603 			      + bfinfdpic_got_initial_offset (info),
2604 			      contents + rel->r_offset + 4);
2605 		else
2606 		  /* A function descriptor used for lazy or local
2607 		     resolving is initialized such that its high word
2608 		     contains the output section index in which the
2609 		     PLT entries are located, and the low word
2610 		     contains the offset of the lazy PLT entry entry
2611 		     point into that section.  */
2612 		  bfd_put_32 (output_bfd,
2613 			      h && ! BFINFDPIC_SYM_LOCAL (info, h)
2614 			      ? 0
2615 			      : _bfinfdpic_osec_to_segment (output_bfd,
2616 							    sec
2617 							    ->output_section),
2618 			      contents + rel->r_offset + 4);
2619 	      }
2620 	  }
2621 	  check_segment[0] = check_segment[1] = got_segment;
2622 	  break;
2623 
2624 	default:
2625 	  check_segment[0] = isec_segment;
2626 	  check_segment[1] = sec
2627 	    ? _bfinfdpic_osec_to_segment (output_bfd, sec->output_section)
2628 	    : (unsigned)-1;
2629 	  break;
2630 	}
2631 
2632       if (check_segment[0] != check_segment[1] && IS_FDPIC (output_bfd))
2633 	{
2634 #if 1 /* If you take this out, remove the #error from fdpic-static-6.d
2635 	 in the ld testsuite.  */
2636 	  /* This helps catch problems in GCC while we can't do more
2637 	     than static linking.  The idea is to test whether the
2638 	     input file basename is crt0.o only once.  */
2639 	  if (silence_segment_error == 1)
2640 	    silence_segment_error =
2641 	      (strlen (input_bfd->filename) == 6
2642 	       && strcmp (input_bfd->filename, "crt0.o") == 0)
2643 	      || (strlen (input_bfd->filename) > 6
2644 		  && strcmp (input_bfd->filename
2645 			     + strlen (input_bfd->filename) - 7,
2646 			     "/crt0.o") == 0)
2647 	      ? -1 : 0;
2648 #endif
2649 	  if (!silence_segment_error
2650 	      /* We don't want duplicate errors for undefined
2651 		 symbols.  */
2652 	      && !(picrel && picrel->symndx == -1
2653 		   && picrel->d.h->root.type == bfd_link_hash_undefined))
2654 	    info->callbacks->warning
2655 	      (info,
2656 	       (info->shared || info->pie)
2657 	       ? _("relocations between different segments are not supported")
2658 	       : _("warning: relocation references a different segment"),
2659 	       name, input_bfd, input_section, rel->r_offset);
2660 	  if (!silence_segment_error && (info->shared || info->pie))
2661 	    return FALSE;
2662 	  elf_elfheader (output_bfd)->e_flags |= EF_BFIN_PIC;
2663 	}
2664 
2665       switch (r_type)
2666 	{
2667 	case R_BFIN_GOTOFFHI:
2668 	  /* We need the addend to be applied before we shift the
2669 	     value right.  */
2670 	  relocation += rel->r_addend;
2671 	  /* Fall through.  */
2672 	case R_BFIN_GOTHI:
2673 	case R_BFIN_FUNCDESC_GOTHI:
2674 	case R_BFIN_FUNCDESC_GOTOFFHI:
2675 	  relocation >>= 16;
2676 	  /* Fall through.  */
2677 
2678 	case R_BFIN_GOTLO:
2679 	case R_BFIN_FUNCDESC_GOTLO:
2680 	case R_BFIN_GOTOFFLO:
2681 	case R_BFIN_FUNCDESC_GOTOFFLO:
2682 	  relocation &= 0xffff;
2683 	  break;
2684 
2685 	default:
2686 	  break;
2687 	}
2688 
2689       switch (r_type)
2690 	{
2691 	case R_pcrel24:
2692 	case R_pcrel24_jump_l:
2693 	  if (! IS_FDPIC (output_bfd) || ! picrel->plt)
2694 	    break;
2695 	  /* Fall through.  */
2696 
2697 	  /* When referencing a GOT entry, a function descriptor or a
2698 	     PLT, we don't want the addend to apply to the reference,
2699 	     but rather to the referenced symbol.  The actual entry
2700 	     will have already been created taking the addend into
2701 	     account, so cancel it out here.  */
2702 	case R_BFIN_GOT17M4:
2703 	case R_BFIN_GOTHI:
2704 	case R_BFIN_GOTLO:
2705 	case R_BFIN_FUNCDESC_GOT17M4:
2706 	case R_BFIN_FUNCDESC_GOTHI:
2707 	case R_BFIN_FUNCDESC_GOTLO:
2708 	case R_BFIN_FUNCDESC_GOTOFF17M4:
2709 	case R_BFIN_FUNCDESC_GOTOFFHI:
2710 	case R_BFIN_FUNCDESC_GOTOFFLO:
2711 	  /* Note that we only want GOTOFFHI, not GOTOFFLO or GOTOFF17M4
2712 	     here, since we do want to apply the addend to the others.
2713 	     Note that we've applied the addend to GOTOFFHI before we
2714 	     shifted it right.  */
2715 	case R_BFIN_GOTOFFHI:
2716 	  relocation -= rel->r_addend;
2717 	  break;
2718 
2719 	default:
2720 	  break;
2721 	}
2722 
2723       if (r_type == R_pcrel24
2724 	  || r_type == R_pcrel24_jump_l)
2725 	{
2726 	  bfd_vma x;
2727 	  bfd_vma address = rel->r_offset;
2728 
2729 	  relocation += rel->r_addend;
2730 
2731 	  /* Perform usual pc-relative correction.  */
2732 	  relocation -= input_section->output_section->vma + input_section->output_offset;
2733 	  relocation -= address;
2734 
2735 	  /* We are getting reloc_entry->address 2 byte off from
2736 	     the start of instruction. Assuming absolute postion
2737 	     of the reloc data. But, following code had been written assuming
2738 	     reloc address is starting at begining of instruction.
2739 	     To compensate that I have increased the value of
2740 	     relocation by 1 (effectively 2) and used the addr -2 instead of addr.  */
2741 
2742 	  relocation += 2;
2743 	  address -= 2;
2744 
2745 	  relocation >>= 1;
2746 
2747 	  x = bfd_get_16 (input_bfd, contents + address);
2748 	  x = (x & 0xff00) | ((relocation >> 16) & 0xff);
2749 	  bfd_put_16 (input_bfd, x, contents + address);
2750 
2751 	  x = bfd_get_16 (input_bfd, contents + address + 2);
2752 	  x = relocation & 0xFFFF;
2753 	  bfd_put_16 (input_bfd, x, contents + address + 2);
2754 	  r = bfd_reloc_ok;
2755 	}
2756       else
2757 	r = _bfd_final_link_relocate (howto, input_bfd, input_section,
2758 				      contents, rel->r_offset,
2759 				      relocation, rel->r_addend);
2760 
2761       if (r != bfd_reloc_ok)
2762 	{
2763 	  const char * msg = (const char *) NULL;
2764 
2765 	  switch (r)
2766 	    {
2767 	    case bfd_reloc_overflow:
2768 	      r = info->callbacks->reloc_overflow
2769 		(info, (h ? &h->root : NULL), name, howto->name,
2770 		 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
2771 	      break;
2772 
2773 	    case bfd_reloc_undefined:
2774 	      r = info->callbacks->undefined_symbol
2775 		(info, name, input_bfd, input_section, rel->r_offset, TRUE);
2776 	      break;
2777 
2778 	    case bfd_reloc_outofrange:
2779 	      msg = _("internal error: out of range error");
2780 	      break;
2781 
2782 	    case bfd_reloc_notsupported:
2783 	      msg = _("internal error: unsupported relocation error");
2784 	      break;
2785 
2786 	    case bfd_reloc_dangerous:
2787 	      msg = _("internal error: dangerous relocation");
2788 	      break;
2789 
2790 	    default:
2791 	      msg = _("internal error: unknown error");
2792 	      break;
2793 	    }
2794 
2795 	  if (msg)
2796 	    r = info->callbacks->warning
2797 	      (info, msg, name, input_bfd, input_section, rel->r_offset);
2798 
2799 	  if (! r)
2800 	    return FALSE;
2801 	}
2802     }
2803 
2804   return TRUE;
2805 }
2806 
2807 static bfd_boolean
bfin_relocate_section(bfd * output_bfd,struct bfd_link_info * info,bfd * input_bfd,asection * input_section,bfd_byte * contents,Elf_Internal_Rela * relocs,Elf_Internal_Sym * local_syms,asection ** local_sections)2808 bfin_relocate_section (bfd * output_bfd,
2809 		       struct bfd_link_info *info,
2810 		       bfd * input_bfd,
2811 		       asection * input_section,
2812 		       bfd_byte * contents,
2813 		       Elf_Internal_Rela * relocs,
2814 		       Elf_Internal_Sym * local_syms,
2815 		       asection ** local_sections)
2816 {
2817   bfd *dynobj;
2818   Elf_Internal_Shdr *symtab_hdr;
2819   struct elf_link_hash_entry **sym_hashes;
2820   bfd_vma *local_got_offsets;
2821   asection *sgot;
2822   asection *sreloc;
2823   Elf_Internal_Rela *rel;
2824   Elf_Internal_Rela *relend;
2825   int i = 0;
2826 
2827   if (info->relocatable)
2828     return TRUE;
2829 
2830   dynobj = elf_hash_table (info)->dynobj;
2831   symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
2832   sym_hashes = elf_sym_hashes (input_bfd);
2833   local_got_offsets = elf_local_got_offsets (input_bfd);
2834 
2835   sgot = NULL;
2836   sreloc = NULL;
2837 
2838   rel = relocs;
2839   relend = relocs + input_section->reloc_count;
2840   for (; rel < relend; rel++, i++)
2841     {
2842       int r_type;
2843       reloc_howto_type *howto;
2844       unsigned long r_symndx;
2845       struct elf_link_hash_entry *h;
2846       Elf_Internal_Sym *sym;
2847       asection *sec;
2848       bfd_vma relocation = 0;
2849       bfd_boolean unresolved_reloc;
2850       bfd_reloc_status_type r;
2851       bfd_vma address;
2852 
2853       r_type = ELF32_R_TYPE (rel->r_info);
2854       if (r_type < 0 || r_type >= 243)
2855 	{
2856 	  bfd_set_error (bfd_error_bad_value);
2857 	  return FALSE;
2858 	}
2859 
2860       if (r_type == R_BFIN_GNU_VTENTRY
2861           || r_type == R_BFIN_GNU_VTINHERIT)
2862 	continue;
2863 
2864       howto = bfin_reloc_type_lookup (input_bfd, r_type);
2865       if (howto == NULL)
2866 	{
2867 	  bfd_set_error (bfd_error_bad_value);
2868 	  return FALSE;
2869 	}
2870       r_symndx = ELF32_R_SYM (rel->r_info);
2871 
2872       h = NULL;
2873       sym = NULL;
2874       sec = NULL;
2875       unresolved_reloc = FALSE;
2876 
2877       if (r_symndx < symtab_hdr->sh_info)
2878 	{
2879 	  sym = local_syms + r_symndx;
2880 	  sec = local_sections[r_symndx];
2881 	  relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
2882 	}
2883       else
2884 	{
2885 	  bfd_boolean warned;
2886 	  h = NULL;
2887 	  RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
2888 				   r_symndx, symtab_hdr, sym_hashes,
2889 				   h, sec, relocation,
2890 				   unresolved_reloc, warned);
2891 	}
2892 
2893       address = rel->r_offset;
2894 
2895       /* Then, process normally.  */
2896       switch (r_type)
2897 	{
2898 	case R_BFIN_GNU_VTINHERIT:
2899 	case R_BFIN_GNU_VTENTRY:
2900 	  return bfd_reloc_ok;
2901 
2902 	case R_got:
2903 	  /* Relocation is to the address of the entry for this symbol
2904 	     in the global offset table.  */
2905 	  if (h != NULL
2906 	      && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
2907 	    goto do_default;
2908 	  /* Fall through.  */
2909 	  /* Relocation is the offset of the entry for this symbol in
2910 	     the global offset table.  */
2911 
2912 	  {
2913 	    bfd_vma off;
2914 
2915 	    if (sgot == NULL)
2916 	      {
2917 		sgot = bfd_get_section_by_name (dynobj, ".got");
2918 		BFD_ASSERT (sgot != NULL);
2919 	      }
2920 
2921 	    if (h != NULL)
2922 	      {
2923 		bfd_boolean dyn;
2924 
2925 		off = h->got.offset;
2926 		BFD_ASSERT (off != (bfd_vma) - 1);
2927 		dyn = elf_hash_table (info)->dynamic_sections_created;
2928 
2929 		if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
2930 		    || (info->shared
2931 			&& (info->symbolic
2932 			    || h->dynindx == -1
2933 			    || h->forced_local)
2934 			&& h->def_regular))
2935 		  {
2936 		    /* This is actually a static link, or it is a
2937 		       -Bsymbolic link and the symbol is defined
2938 		       locally, or the symbol was forced to be local
2939 		       because of a version file..  We must initialize
2940 		       this entry in the global offset table.  Since
2941 		       the offset must always be a multiple of 4, we
2942 		       use the least significant bit to record whether
2943 		       we have initialized it already.
2944 
2945 		       When doing a dynamic link, we create a .rela.got
2946 		       relocation entry to initialize the value.  This
2947 		       is done in the finish_dynamic_symbol routine.  */
2948 		    if ((off & 1) != 0)
2949 		      off &= ~1;
2950 		    else
2951 		      {
2952 			bfd_put_32 (output_bfd, relocation,
2953 				    sgot->contents + off);
2954 			h->got.offset |= 1;
2955 		      }
2956 		  }
2957 		else
2958 		  unresolved_reloc = FALSE;
2959 	      }
2960 	    else
2961 	      {
2962 		BFD_ASSERT (local_got_offsets != NULL);
2963 		off = local_got_offsets[r_symndx];
2964 		BFD_ASSERT (off != (bfd_vma) - 1);
2965 
2966 		/* The offset must always be a multiple of 4.  We use
2967 		   the least significant bit to record whether we have
2968 		   already generated the necessary reloc.  */
2969 		if ((off & 1) != 0)
2970 		  off &= ~1;
2971 		else
2972 		  {
2973 		    bfd_put_32 (output_bfd, relocation, sgot->contents + off);
2974 
2975 		    if (info->shared)
2976 		      {
2977 			asection *s;
2978 			Elf_Internal_Rela outrel;
2979 			bfd_byte *loc;
2980 
2981 			s = bfd_get_section_by_name (dynobj, ".rela.got");
2982 			BFD_ASSERT (s != NULL);
2983 
2984 			outrel.r_offset = (sgot->output_section->vma
2985 					   + sgot->output_offset + off);
2986 			outrel.r_info =
2987 			  ELF32_R_INFO (0, R_pcrel24);
2988 			outrel.r_addend = relocation;
2989 			loc = s->contents;
2990 			loc +=
2991 			  s->reloc_count++ * sizeof (Elf32_External_Rela);
2992 			bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2993 		      }
2994 
2995 		    local_got_offsets[r_symndx] |= 1;
2996 		  }
2997 	      }
2998 
2999 	    relocation = sgot->output_offset + off;
3000 	    rel->r_addend = 0;
3001             /* bfin : preg = [preg + 17bitdiv4offset] relocation is div by 4.  */
3002             relocation /= 4;
3003 	  }
3004 	  goto do_default;
3005 
3006 	case R_pcrel24:
3007 	case R_pcrel24_jump_l:
3008 	  {
3009 	    bfd_vma x;
3010 
3011 	    relocation += rel->r_addend;
3012 
3013 	    /* Perform usual pc-relative correction.  */
3014 	    relocation -= input_section->output_section->vma + input_section->output_offset;
3015 	    relocation -= address;
3016 
3017 	    /* We are getting reloc_entry->address 2 byte off from
3018 	       the start of instruction. Assuming absolute postion
3019 	       of the reloc data. But, following code had been written assuming
3020 	       reloc address is starting at begining of instruction.
3021 	       To compensate that I have increased the value of
3022 	       relocation by 1 (effectively 2) and used the addr -2 instead of addr.  */
3023 
3024 	    relocation += 2;
3025 	    address -= 2;
3026 
3027 	    relocation >>= 1;
3028 
3029 	    x = bfd_get_16 (input_bfd, contents + address);
3030 	    x = (x & 0xff00) | ((relocation >> 16) & 0xff);
3031 	    bfd_put_16 (input_bfd, x, contents + address);
3032 
3033 	    x = bfd_get_16 (input_bfd, contents + address + 2);
3034 	    x = relocation & 0xFFFF;
3035 	    bfd_put_16 (input_bfd, x, contents + address + 2);
3036 	    r = bfd_reloc_ok;
3037 	  }
3038 	  break;
3039 
3040 	default:
3041 	do_default:
3042 	  r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3043 					contents, address,
3044 					relocation, rel->r_addend);
3045 
3046 	  break;
3047 	}
3048 
3049       /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
3050          because such sections are not SEC_ALLOC and thus ld.so will
3051          not process them.  */
3052       if (unresolved_reloc
3053 	  && !((input_section->flags & SEC_DEBUGGING) != 0 && h->def_dynamic))
3054 	{
3055 	  (*_bfd_error_handler)
3056 	    (_("%B(%A+0x%lx): unresolvable relocation against symbol `%s'"),
3057 	     input_bfd,
3058 	     input_section, (long) rel->r_offset, h->root.root.string);
3059 	  return FALSE;
3060 	}
3061 
3062       if (r != bfd_reloc_ok)
3063 	{
3064 	  const char *name;
3065 
3066 	  if (h != NULL)
3067 	    name = h->root.root.string;
3068 	  else
3069 	    {
3070 	      name = bfd_elf_string_from_elf_section (input_bfd,
3071 						      symtab_hdr->sh_link,
3072 						      sym->st_name);
3073 	      if (name == NULL)
3074 		return FALSE;
3075 	      if (*name == '\0')
3076 		name = bfd_section_name (input_bfd, sec);
3077 	    }
3078 
3079 	  if (r == bfd_reloc_overflow)
3080 	    {
3081 	      if (!(info->callbacks->reloc_overflow
3082 		    (info, (h ? &h->root : NULL), name, howto->name,
3083 		     (bfd_vma) 0, input_bfd, input_section, rel->r_offset)))
3084 		return FALSE;
3085 	    }
3086 	  else
3087 	    {
3088 	      (*_bfd_error_handler)
3089 		(_("%B(%A+0x%lx): reloc against `%s': error %d"),
3090 		 input_bfd, input_section,
3091 		 (long) rel->r_offset, name, (int) r);
3092 	      return FALSE;
3093 	    }
3094 	}
3095     }
3096 
3097   return TRUE;
3098 }
3099 
3100 static asection *
bfin_gc_mark_hook(asection * sec,struct bfd_link_info * info ATTRIBUTE_UNUSED,Elf_Internal_Rela * rel,struct elf_link_hash_entry * h,Elf_Internal_Sym * sym)3101 bfin_gc_mark_hook (asection * sec,
3102 		   struct bfd_link_info *info ATTRIBUTE_UNUSED,
3103 		   Elf_Internal_Rela * rel,
3104 		   struct elf_link_hash_entry *h,
3105                    Elf_Internal_Sym * sym)
3106 {
3107   if (h != NULL)
3108     {
3109       switch (ELF32_R_TYPE (rel->r_info))
3110 	{
3111 
3112 	case R_BFIN_GNU_VTINHERIT:
3113 	case R_BFIN_GNU_VTENTRY:
3114 	  break;
3115 
3116 	default:
3117 	  switch (h->root.type)
3118 	    {
3119 	    default:
3120 	      break;
3121 
3122 	    case bfd_link_hash_defined:
3123 	    case bfd_link_hash_defweak:
3124 	      return h->root.u.def.section;
3125 
3126 	    case bfd_link_hash_common:
3127 	      return h->root.u.c.p->section;
3128 	    }
3129 	}
3130     }
3131   else
3132     return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
3133 
3134   return NULL;
3135 }
3136 
3137 
3138 /* Update the got entry reference counts for the section being removed.  */
3139 
3140 static bfd_boolean
bfinfdpic_gc_sweep_hook(bfd * abfd ATTRIBUTE_UNUSED,struct bfd_link_info * info ATTRIBUTE_UNUSED,asection * sec ATTRIBUTE_UNUSED,const Elf_Internal_Rela * relocs ATTRIBUTE_UNUSED)3141 bfinfdpic_gc_sweep_hook (bfd *abfd ATTRIBUTE_UNUSED,
3142 			 struct bfd_link_info *info ATTRIBUTE_UNUSED,
3143 			 asection *sec ATTRIBUTE_UNUSED,
3144 			 const Elf_Internal_Rela *relocs ATTRIBUTE_UNUSED)
3145 {
3146   return TRUE;
3147 }
3148 
3149 /* Update the got entry reference counts for the section being removed.  */
3150 
3151 static bfd_boolean
bfin_gc_sweep_hook(bfd * abfd,struct bfd_link_info * info,asection * sec,const Elf_Internal_Rela * relocs)3152 bfin_gc_sweep_hook (bfd * abfd,
3153 		    struct bfd_link_info *info,
3154 		    asection * sec,
3155                     const Elf_Internal_Rela * relocs)
3156 {
3157   Elf_Internal_Shdr *symtab_hdr;
3158   struct elf_link_hash_entry **sym_hashes;
3159   bfd_signed_vma *local_got_refcounts;
3160   const Elf_Internal_Rela *rel, *relend;
3161   bfd *dynobj;
3162   asection *sgot;
3163   asection *srelgot;
3164 
3165   dynobj = elf_hash_table (info)->dynobj;
3166   if (dynobj == NULL)
3167     return TRUE;
3168 
3169   symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3170   sym_hashes = elf_sym_hashes (abfd);
3171   local_got_refcounts = elf_local_got_refcounts (abfd);
3172 
3173   sgot = bfd_get_section_by_name (dynobj, ".got");
3174   srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
3175 
3176   relend = relocs + sec->reloc_count;
3177   for (rel = relocs; rel < relend; rel++)
3178     {
3179       unsigned long r_symndx;
3180       struct elf_link_hash_entry *h;
3181 
3182       switch (ELF32_R_TYPE (rel->r_info))
3183 	{
3184 	case R_got:
3185 	  r_symndx = ELF32_R_SYM (rel->r_info);
3186 	  if (r_symndx >= symtab_hdr->sh_info)
3187 	    {
3188 	      h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3189 	      if (h->got.refcount > 0)
3190 		{
3191 		  --h->got.refcount;
3192 		  if (h->got.refcount == 0)
3193 		    {
3194 		      /* We don't need the .got entry any more.  */
3195 		      sgot->size -= 4;
3196 		      srelgot->size -= sizeof (Elf32_External_Rela);
3197 		    }
3198 		}
3199 	    }
3200 	  else if (local_got_refcounts != NULL)
3201 	    {
3202 	      if (local_got_refcounts[r_symndx] > 0)
3203 		{
3204 		  --local_got_refcounts[r_symndx];
3205 		  if (local_got_refcounts[r_symndx] == 0)
3206 		    {
3207 		      /* We don't need the .got entry any more.  */
3208 		      sgot->size -= 4;
3209 		      if (info->shared)
3210 			srelgot->size -= sizeof (Elf32_External_Rela);
3211 		    }
3212 		}
3213 	    }
3214 	  break;
3215 	default:
3216 	  break;
3217 	}
3218     }
3219   return TRUE;
3220 }
3221 
3222 /* We need dynamic symbols for every section, since segments can
3223    relocate independently.  */
3224 static bfd_boolean
_bfinfdpic_link_omit_section_dynsym(bfd * output_bfd ATTRIBUTE_UNUSED,struct bfd_link_info * info ATTRIBUTE_UNUSED,asection * p ATTRIBUTE_UNUSED)3225 _bfinfdpic_link_omit_section_dynsym (bfd *output_bfd ATTRIBUTE_UNUSED,
3226 				    struct bfd_link_info *info
3227 				    ATTRIBUTE_UNUSED,
3228 				    asection *p ATTRIBUTE_UNUSED)
3229 {
3230   switch (elf_section_data (p)->this_hdr.sh_type)
3231     {
3232     case SHT_PROGBITS:
3233     case SHT_NOBITS:
3234       /* If sh_type is yet undecided, assume it could be
3235 	 SHT_PROGBITS/SHT_NOBITS.  */
3236     case SHT_NULL:
3237       return FALSE;
3238 
3239       /* There shouldn't be section relative relocations
3240 	 against any other section.  */
3241     default:
3242       return TRUE;
3243     }
3244 }
3245 
3246 /* Create  a .got section, as well as its additional info field.  This
3247    is almost entirely copied from
3248    elflink.c:_bfd_elf_create_got_section().  */
3249 
3250 static bfd_boolean
_bfin_create_got_section(bfd * abfd,struct bfd_link_info * info)3251 _bfin_create_got_section (bfd *abfd, struct bfd_link_info *info)
3252 {
3253   flagword flags, pltflags;
3254   asection *s;
3255   struct elf_link_hash_entry *h;
3256   const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3257   int ptralign;
3258   int offset;
3259 
3260   /* This function may be called more than once.  */
3261   s = bfd_get_section_by_name (abfd, ".got");
3262   if (s != NULL && (s->flags & SEC_LINKER_CREATED) != 0)
3263     return TRUE;
3264 
3265   /* Machine specific: although pointers are 32-bits wide, we want the
3266      GOT to be aligned to a 64-bit boundary, such that function
3267      descriptors in it can be accessed with 64-bit loads and
3268      stores.  */
3269   ptralign = 3;
3270 
3271   flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3272 	   | SEC_LINKER_CREATED);
3273   pltflags = flags;
3274 
3275   s = bfd_make_section_with_flags (abfd, ".got", flags);
3276   if (s == NULL
3277       || !bfd_set_section_alignment (abfd, s, ptralign))
3278     return FALSE;
3279 
3280   if (bed->want_got_plt)
3281     {
3282       s = bfd_make_section_with_flags (abfd, ".got.plt", flags);
3283       if (s == NULL
3284 	  || !bfd_set_section_alignment (abfd, s, ptralign))
3285 	return FALSE;
3286     }
3287 
3288   if (bed->want_got_sym)
3289     {
3290       /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the .got
3291 	 (or .got.plt) section.  We don't do this in the linker script
3292 	 because we don't want to define the symbol if we are not creating
3293 	 a global offset table.  */
3294       h = _bfd_elf_define_linkage_sym (abfd, info, s, "_GLOBAL_OFFSET_TABLE_");
3295       elf_hash_table (info)->hgot = h;
3296       if (h == NULL)
3297 	return FALSE;
3298 
3299       /* Machine-specific: we want the symbol for executables as
3300 	 well.  */
3301       if (! bfd_elf_link_record_dynamic_symbol (info, h))
3302 	return FALSE;
3303     }
3304 
3305   /* The first bit of the global offset table is the header.  */
3306   s->size += bed->got_header_size;
3307 
3308   /* This is the machine-specific part.  Create and initialize section
3309      data for the got.  */
3310   if (IS_FDPIC (abfd))
3311     {
3312       bfinfdpic_got_section (info) = s;
3313       bfinfdpic_relocs_info (info) = htab_try_create (1,
3314 						      bfinfdpic_relocs_info_hash,
3315 						      bfinfdpic_relocs_info_eq,
3316 						      (htab_del) NULL);
3317       if (! bfinfdpic_relocs_info (info))
3318 	return FALSE;
3319 
3320       s = bfd_make_section_with_flags (abfd, ".rel.got",
3321 				       (flags | SEC_READONLY));
3322       if (s == NULL
3323 	  || ! bfd_set_section_alignment (abfd, s, 2))
3324 	return FALSE;
3325 
3326       bfinfdpic_gotrel_section (info) = s;
3327 
3328       /* Machine-specific.  */
3329       s = bfd_make_section_with_flags (abfd, ".rofixup",
3330 				       (flags | SEC_READONLY));
3331       if (s == NULL
3332 	  || ! bfd_set_section_alignment (abfd, s, 2))
3333 	return FALSE;
3334 
3335       bfinfdpic_gotfixup_section (info) = s;
3336       offset = -2048;
3337       flags = BSF_GLOBAL;
3338     }
3339   else
3340     {
3341       offset = 2048;
3342       flags = BSF_GLOBAL | BSF_WEAK;
3343     }
3344 
3345   return TRUE;
3346 }
3347 
3348 /* Make sure the got and plt sections exist, and that our pointers in
3349    the link hash table point to them.  */
3350 
3351 static bfd_boolean
elf32_bfinfdpic_create_dynamic_sections(bfd * abfd,struct bfd_link_info * info)3352 elf32_bfinfdpic_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
3353 {
3354   /* This is mostly copied from
3355      elflink.c:_bfd_elf_create_dynamic_sections().  */
3356   flagword flags, pltflags;
3357   asection *s;
3358   const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3359 
3360   /* We need to create .plt, .rel[a].plt, .got, .got.plt, .dynbss, and
3361      .rel[a].bss sections.  */
3362 
3363   flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
3364 	   | SEC_LINKER_CREATED);
3365 
3366   pltflags = flags;
3367   pltflags |= SEC_CODE;
3368   if (bed->plt_not_loaded)
3369     pltflags &= ~ (SEC_CODE | SEC_LOAD | SEC_HAS_CONTENTS);
3370   if (bed->plt_readonly)
3371     pltflags |= SEC_READONLY;
3372 
3373   s = bfd_make_section (abfd, ".plt");
3374   if (s == NULL
3375       || ! bfd_set_section_flags (abfd, s, pltflags)
3376       || ! bfd_set_section_alignment (abfd, s, bed->plt_alignment))
3377     return FALSE;
3378   /* Blackfin-specific: remember it.  */
3379   bfinfdpic_plt_section (info) = s;
3380 
3381   if (bed->want_plt_sym)
3382     {
3383       /* Define the symbol _PROCEDURE_LINKAGE_TABLE_ at the start of the
3384 	 .plt section.  */
3385       struct elf_link_hash_entry *h;
3386       struct bfd_link_hash_entry *bh = NULL;
3387 
3388       if (! (_bfd_generic_link_add_one_symbol
3389 	     (info, abfd, "_PROCEDURE_LINKAGE_TABLE_", BSF_GLOBAL, s, 0, NULL,
3390 	      FALSE, get_elf_backend_data (abfd)->collect, &bh)))
3391 	return FALSE;
3392       h = (struct elf_link_hash_entry *) bh;
3393       h->def_regular = 1;
3394       h->type = STT_OBJECT;
3395 
3396       if (! info->executable
3397 	  && ! bfd_elf_link_record_dynamic_symbol (info, h))
3398 	return FALSE;
3399     }
3400 
3401   /* Blackfin-specific: we want rel relocations for the plt.  */
3402   s = bfd_make_section (abfd, ".rel.plt");
3403   if (s == NULL
3404       || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY)
3405       || ! bfd_set_section_alignment (abfd, s, bed->s->log_file_align))
3406     return FALSE;
3407   /* Blackfin-specific: remember it.  */
3408   bfinfdpic_pltrel_section (info) = s;
3409 
3410   /* Blackfin-specific: we want to create the GOT in the Blackfin way.  */
3411   if (! _bfin_create_got_section (abfd, info))
3412     return FALSE;
3413 
3414   /* Blackfin-specific: make sure we created everything we wanted.  */
3415   BFD_ASSERT (bfinfdpic_got_section (info) && bfinfdpic_gotrel_section (info)
3416 	      /* && bfinfdpic_gotfixup_section (info) */
3417 	      && bfinfdpic_plt_section (info)
3418 	      && bfinfdpic_pltrel_section (info));
3419 
3420   if (bed->want_dynbss)
3421     {
3422       /* The .dynbss section is a place to put symbols which are defined
3423 	 by dynamic objects, are referenced by regular objects, and are
3424 	 not functions.  We must allocate space for them in the process
3425 	 image and use a R_*_COPY reloc to tell the dynamic linker to
3426 	 initialize them at run time.  The linker script puts the .dynbss
3427 	 section into the .bss section of the final image.  */
3428       s = bfd_make_section (abfd, ".dynbss");
3429       if (s == NULL
3430 	  || ! bfd_set_section_flags (abfd, s, SEC_ALLOC | SEC_LINKER_CREATED))
3431 	return FALSE;
3432 
3433       /* The .rel[a].bss section holds copy relocs.  This section is not
3434      normally needed.  We need to create it here, though, so that the
3435      linker will map it to an output section.  We can't just create it
3436      only if we need it, because we will not know whether we need it
3437      until we have seen all the input files, and the first time the
3438      main linker code calls BFD after examining all the input files
3439      (size_dynamic_sections) the input sections have already been
3440      mapped to the output sections.  If the section turns out not to
3441      be needed, we can discard it later.  We will never need this
3442      section when generating a shared object, since they do not use
3443      copy relocs.  */
3444       if (! info->shared)
3445 	{
3446 	  s = bfd_make_section (abfd,
3447 				(bed->default_use_rela_p
3448 				 ? ".rela.bss" : ".rel.bss"));
3449 	  if (s == NULL
3450 	      || ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY)
3451 	      || ! bfd_set_section_alignment (abfd, s, bed->s->log_file_align))
3452 	    return FALSE;
3453 	}
3454     }
3455 
3456   return TRUE;
3457 }
3458 
3459 /* The name of the dynamic interpreter.  This is put in the .interp
3460    section.  */
3461 
3462 #define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1"
3463 
3464 #define DEFAULT_STACK_SIZE 0x20000
3465 
3466 /* This structure is used to collect the number of entries present in
3467    each addressable range of the got.  */
3468 struct _bfinfdpic_dynamic_got_info
3469 {
3470   /* Several bits of information about the current link.  */
3471   struct bfd_link_info *info;
3472   /* Total size needed for GOT entries within the 18- or 32-bit
3473      ranges.  */
3474   bfd_vma got17m4, gothilo;
3475   /* Total size needed for function descriptor entries within the 18-
3476      or 32-bit ranges.  */
3477   bfd_vma fd17m4, fdhilo;
3478   /* Total size needed function descriptor entries referenced in PLT
3479      entries, that would be profitable to place in offsets close to
3480      the PIC register.  */
3481   bfd_vma fdplt;
3482   /* Total size needed by lazy PLT entries.  */
3483   bfd_vma lzplt;
3484   /* Number of relocations carried over from input object files.  */
3485   unsigned long relocs;
3486   /* Number of fixups introduced by relocations in input object files.  */
3487   unsigned long fixups;
3488 };
3489 
3490 /* Compute the total GOT size required by each symbol in each range.
3491    Symbols may require up to 4 words in the GOT: an entry pointing to
3492    the symbol, an entry pointing to its function descriptor, and a
3493    private function descriptors taking two words.  */
3494 
3495 static int
_bfinfdpic_count_got_plt_entries(void ** entryp,void * dinfo_)3496 _bfinfdpic_count_got_plt_entries (void **entryp, void *dinfo_)
3497 {
3498   struct bfinfdpic_relocs_info *entry = *entryp;
3499   struct _bfinfdpic_dynamic_got_info *dinfo = dinfo_;
3500   unsigned relocs = 0, fixups = 0;
3501 
3502   /* Allocate space for a GOT entry pointing to the symbol.  */
3503   if (entry->got17m4)
3504     dinfo->got17m4 += 4;
3505   else if (entry->gothilo)
3506     dinfo->gothilo += 4;
3507   else
3508     entry->relocs32--;
3509   entry->relocs32++;
3510 
3511   /* Allocate space for a GOT entry pointing to the function
3512      descriptor.  */
3513   if (entry->fdgot17m4)
3514     dinfo->got17m4 += 4;
3515   else if (entry->fdgothilo)
3516     dinfo->gothilo += 4;
3517   else
3518     entry->relocsfd--;
3519   entry->relocsfd++;
3520 
3521   /* Decide whether we need a PLT entry, a function descriptor in the
3522      GOT, and a lazy PLT entry for this symbol.  */
3523   entry->plt = entry->call
3524     && entry->symndx == -1 && ! BFINFDPIC_SYM_LOCAL (dinfo->info, entry->d.h)
3525     && elf_hash_table (dinfo->info)->dynamic_sections_created;
3526   entry->privfd = entry->plt
3527     || entry->fdgoff17m4 || entry->fdgoffhilo
3528     || ((entry->fd || entry->fdgot17m4 || entry->fdgothilo)
3529 	&& (entry->symndx != -1
3530 	    || BFINFDPIC_FUNCDESC_LOCAL (dinfo->info, entry->d.h)));
3531   entry->lazyplt = entry->privfd
3532     && entry->symndx == -1 && ! BFINFDPIC_SYM_LOCAL (dinfo->info, entry->d.h)
3533     && ! (dinfo->info->flags & DF_BIND_NOW)
3534     && elf_hash_table (dinfo->info)->dynamic_sections_created;
3535 
3536   /* Allocate space for a function descriptor.  */
3537   if (entry->fdgoff17m4)
3538     dinfo->fd17m4 += 8;
3539   else if (entry->privfd && entry->plt)
3540     dinfo->fdplt += 8;
3541   else if (entry->privfd)
3542     dinfo->fdhilo += 8;
3543   else
3544     entry->relocsfdv--;
3545   entry->relocsfdv++;
3546 
3547   if (entry->lazyplt)
3548     dinfo->lzplt += LZPLT_NORMAL_SIZE;
3549 
3550   if (!dinfo->info->executable || dinfo->info->pie)
3551     relocs = entry->relocs32 + entry->relocsfd + entry->relocsfdv;
3552   else
3553     {
3554       if (entry->symndx != -1 || BFINFDPIC_SYM_LOCAL (dinfo->info, entry->d.h))
3555 	{
3556 	  if (entry->symndx != -1
3557 	      || entry->d.h->root.type != bfd_link_hash_undefweak)
3558 	    fixups += entry->relocs32 + 2 * entry->relocsfdv;
3559 	}
3560       else
3561 	relocs += entry->relocs32 + entry->relocsfdv;
3562 
3563       if (entry->symndx != -1
3564 	  || BFINFDPIC_FUNCDESC_LOCAL (dinfo->info, entry->d.h))
3565 	{
3566 	  if (entry->symndx != -1
3567 	      || entry->d.h->root.type != bfd_link_hash_undefweak)
3568 	    fixups += entry->relocsfd;
3569 	}
3570       else
3571 	relocs += entry->relocsfd;
3572     }
3573 
3574   entry->dynrelocs += relocs;
3575   entry->fixups += fixups;
3576   dinfo->relocs += relocs;
3577   dinfo->fixups += fixups;
3578 
3579   return 1;
3580 }
3581 
3582 /* This structure is used to assign offsets to got entries, function
3583    descriptors, plt entries and lazy plt entries.  */
3584 
3585 struct _bfinfdpic_dynamic_got_plt_info
3586 {
3587   /* Summary information collected with _bfinfdpic_count_got_plt_entries.  */
3588   struct _bfinfdpic_dynamic_got_info g;
3589 
3590   /* For each addressable range, we record a MAX (positive) and MIN
3591      (negative) value.  CUR is used to assign got entries, and it's
3592      incremented from an initial positive value to MAX, then from MIN
3593      to FDCUR (unless FDCUR wraps around first).  FDCUR is used to
3594      assign function descriptors, and it's decreased from an initial
3595      non-positive value to MIN, then from MAX down to CUR (unless CUR
3596      wraps around first).  All of MIN, MAX, CUR and FDCUR always point
3597      to even words.  ODD, if non-zero, indicates an odd word to be
3598      used for the next got entry, otherwise CUR is used and
3599      incremented by a pair of words, wrapping around when it reaches
3600      MAX.  FDCUR is decremented (and wrapped) before the next function
3601      descriptor is chosen.  FDPLT indicates the number of remaining
3602      slots that can be used for function descriptors used only by PLT
3603      entries.  */
3604   struct _bfinfdpic_dynamic_got_alloc_data
3605   {
3606     bfd_signed_vma max, cur, odd, fdcur, min;
3607     bfd_vma fdplt;
3608   } got17m4, gothilo;
3609 };
3610 
3611 /* Determine the positive and negative ranges to be used by each
3612    offset range in the GOT.  FDCUR and CUR, that must be aligned to a
3613    double-word boundary, are the minimum (negative) and maximum
3614    (positive) GOT offsets already used by previous ranges, except for
3615    an ODD entry that may have been left behind.  GOT and FD indicate
3616    the size of GOT entries and function descriptors that must be
3617    placed within the range from -WRAP to WRAP.  If there's room left,
3618    up to FDPLT bytes should be reserved for additional function
3619    descriptors.  */
3620 
3621 inline static bfd_signed_vma
_bfinfdpic_compute_got_alloc_data(struct _bfinfdpic_dynamic_got_alloc_data * gad,bfd_signed_vma fdcur,bfd_signed_vma odd,bfd_signed_vma cur,bfd_vma got,bfd_vma fd,bfd_vma fdplt,bfd_vma wrap)3622 _bfinfdpic_compute_got_alloc_data (struct _bfinfdpic_dynamic_got_alloc_data *gad,
3623 				   bfd_signed_vma fdcur,
3624 				   bfd_signed_vma odd,
3625 				   bfd_signed_vma cur,
3626 				   bfd_vma got,
3627 				   bfd_vma fd,
3628 				   bfd_vma fdplt,
3629 				   bfd_vma wrap)
3630 {
3631   bfd_signed_vma wrapmin = -wrap;
3632 
3633   /* Start at the given initial points.  */
3634   gad->fdcur = fdcur;
3635   gad->cur = cur;
3636 
3637   /* If we had an incoming odd word and we have any got entries that
3638      are going to use it, consume it, otherwise leave gad->odd at
3639      zero.  We might force gad->odd to zero and return the incoming
3640      odd such that it is used by the next range, but then GOT entries
3641      might appear to be out of order and we wouldn't be able to
3642      shorten the GOT by one word if it turns out to end with an
3643      unpaired GOT entry.  */
3644   if (odd && got)
3645     {
3646       gad->odd = odd;
3647       got -= 4;
3648       odd = 0;
3649     }
3650   else
3651     gad->odd = 0;
3652 
3653   /* If we're left with an unpaired GOT entry, compute its location
3654      such that we can return it.  Otherwise, if got doesn't require an
3655      odd number of words here, either odd was already zero in the
3656      block above, or it was set to zero because got was non-zero, or
3657      got was already zero.  In the latter case, we want the value of
3658      odd to carry over to the return statement, so we don't want to
3659      reset odd unless the condition below is true.  */
3660   if (got & 4)
3661     {
3662       odd = cur + got;
3663       got += 4;
3664     }
3665 
3666   /* Compute the tentative boundaries of this range.  */
3667   gad->max = cur + got;
3668   gad->min = fdcur - fd;
3669   gad->fdplt = 0;
3670 
3671   /* If function descriptors took too much space, wrap some of them
3672      around.  */
3673   if (gad->min < wrapmin)
3674     {
3675       gad->max += wrapmin - gad->min;
3676       gad->min = wrapmin;
3677     }
3678   /* If there is space left and we have function descriptors
3679      referenced in PLT entries that could take advantage of shorter
3680      offsets, place them here.  */
3681   else if (fdplt && gad->min > wrapmin)
3682     {
3683       bfd_vma fds;
3684       if ((bfd_vma) (gad->min - wrapmin) < fdplt)
3685 	fds = gad->min - wrapmin;
3686       else
3687 	fds = fdplt;
3688 
3689       fdplt -= fds;
3690       gad->min -= fds;
3691       gad->fdplt += fds;
3692     }
3693 
3694   /* If GOT entries took too much space, wrap some of them around.
3695      This may well cause gad->min to become lower than wrapmin.  This
3696      will cause a relocation overflow later on, so we don't have to
3697      report it here . */
3698   if ((bfd_vma) gad->max > wrap)
3699     {
3700       gad->min -= gad->max - wrap;
3701       gad->max = wrap;
3702     }
3703   /* If there is more space left, try to place some more function
3704      descriptors for PLT entries.  */
3705   else if (fdplt && (bfd_vma) gad->max < wrap)
3706     {
3707       bfd_vma fds;
3708       if ((bfd_vma) (wrap - gad->max) < fdplt)
3709 	fds = wrap - gad->max;
3710       else
3711 	fds = fdplt;
3712 
3713       fdplt -= fds;
3714       gad->max += fds;
3715       gad->fdplt += fds;
3716     }
3717 
3718   /* If odd was initially computed as an offset past the wrap point,
3719      wrap it around.  */
3720   if (odd > gad->max)
3721     odd = gad->min + odd - gad->max;
3722 
3723   /* _bfinfdpic_get_got_entry() below will always wrap gad->cur if needed
3724      before returning, so do it here too.  This guarantees that,
3725      should cur and fdcur meet at the wrap point, they'll both be
3726      equal to min.  */
3727   if (gad->cur == gad->max)
3728     gad->cur = gad->min;
3729 
3730   return odd;
3731 }
3732 
3733 /* Compute the location of the next GOT entry, given the allocation
3734    data for a range.  */
3735 
3736 inline static bfd_signed_vma
_bfinfdpic_get_got_entry(struct _bfinfdpic_dynamic_got_alloc_data * gad)3737 _bfinfdpic_get_got_entry (struct _bfinfdpic_dynamic_got_alloc_data *gad)
3738 {
3739   bfd_signed_vma ret;
3740 
3741   if (gad->odd)
3742     {
3743       /* If there was an odd word left behind, use it.  */
3744       ret = gad->odd;
3745       gad->odd = 0;
3746     }
3747   else
3748     {
3749       /* Otherwise, use the word pointed to by cur, reserve the next
3750 	 as an odd word, and skip to the next pair of words, possibly
3751 	 wrapping around.  */
3752       ret = gad->cur;
3753       gad->odd = gad->cur + 4;
3754       gad->cur += 8;
3755       if (gad->cur == gad->max)
3756 	gad->cur = gad->min;
3757     }
3758 
3759   return ret;
3760 }
3761 
3762 /* Compute the location of the next function descriptor entry in the
3763    GOT, given the allocation data for a range.  */
3764 
3765 inline static bfd_signed_vma
_bfinfdpic_get_fd_entry(struct _bfinfdpic_dynamic_got_alloc_data * gad)3766 _bfinfdpic_get_fd_entry (struct _bfinfdpic_dynamic_got_alloc_data *gad)
3767 {
3768   /* If we're at the bottom, wrap around, and only then allocate the
3769      next pair of words.  */
3770   if (gad->fdcur == gad->min)
3771     gad->fdcur = gad->max;
3772   return gad->fdcur -= 8;
3773 }
3774 
3775 /* Assign GOT offsets for every GOT entry and function descriptor.
3776    Doing everything in a single pass is tricky.  */
3777 
3778 static int
_bfinfdpic_assign_got_entries(void ** entryp,void * info_)3779 _bfinfdpic_assign_got_entries (void **entryp, void *info_)
3780 {
3781   struct bfinfdpic_relocs_info *entry = *entryp;
3782   struct _bfinfdpic_dynamic_got_plt_info *dinfo = info_;
3783 
3784   if (entry->got17m4)
3785     entry->got_entry = _bfinfdpic_get_got_entry (&dinfo->got17m4);
3786   else if (entry->gothilo)
3787     entry->got_entry = _bfinfdpic_get_got_entry (&dinfo->gothilo);
3788 
3789   if (entry->fdgot17m4)
3790     entry->fdgot_entry = _bfinfdpic_get_got_entry (&dinfo->got17m4);
3791   else if (entry->fdgothilo)
3792     entry->fdgot_entry = _bfinfdpic_get_got_entry (&dinfo->gothilo);
3793 
3794   if (entry->fdgoff17m4)
3795     entry->fd_entry = _bfinfdpic_get_fd_entry (&dinfo->got17m4);
3796   else if (entry->plt && dinfo->got17m4.fdplt)
3797     {
3798       dinfo->got17m4.fdplt -= 8;
3799       entry->fd_entry = _bfinfdpic_get_fd_entry (&dinfo->got17m4);
3800     }
3801   else if (entry->plt)
3802     {
3803       dinfo->gothilo.fdplt -= 8;
3804       entry->fd_entry = _bfinfdpic_get_fd_entry (&dinfo->gothilo);
3805     }
3806   else if (entry->privfd)
3807     entry->fd_entry = _bfinfdpic_get_fd_entry (&dinfo->gothilo);
3808 
3809   return 1;
3810 }
3811 
3812 /* Assign GOT offsets to private function descriptors used by PLT
3813    entries (or referenced by 32-bit offsets), as well as PLT entries
3814    and lazy PLT entries.  */
3815 
3816 static int
_bfinfdpic_assign_plt_entries(void ** entryp,void * info_)3817 _bfinfdpic_assign_plt_entries (void **entryp, void *info_)
3818 {
3819   struct bfinfdpic_relocs_info *entry = *entryp;
3820   struct _bfinfdpic_dynamic_got_plt_info *dinfo = info_;
3821 
3822   /* If this symbol requires a local function descriptor, allocate
3823      one.  */
3824   if (entry->privfd && entry->fd_entry == 0)
3825     {
3826       if (dinfo->got17m4.fdplt)
3827 	{
3828 	  entry->fd_entry = _bfinfdpic_get_fd_entry (&dinfo->got17m4);
3829 	  dinfo->got17m4.fdplt -= 8;
3830 	}
3831       else
3832 	{
3833 	  BFD_ASSERT (dinfo->gothilo.fdplt);
3834 	  entry->fd_entry = _bfinfdpic_get_fd_entry (&dinfo->gothilo);
3835 	  dinfo->gothilo.fdplt -= 8;
3836 	}
3837     }
3838 
3839   if (entry->plt)
3840     {
3841       int size;
3842 
3843       /* We use the section's raw size to mark the location of the
3844 	 next PLT entry.  */
3845       entry->plt_entry = bfinfdpic_plt_section (dinfo->g.info)->size;
3846 
3847       /* Figure out the length of this PLT entry based on the
3848 	 addressing mode we need to reach the function descriptor.  */
3849       BFD_ASSERT (entry->fd_entry);
3850       if (entry->fd_entry >= -(1 << (18 - 1))
3851 	  && entry->fd_entry + 4 < (1 << (18 - 1)))
3852 	size = 10;
3853       else
3854 	size = 16;
3855 
3856       bfinfdpic_plt_section (dinfo->g.info)->size += size;
3857     }
3858 
3859   if (entry->lazyplt)
3860     {
3861       entry->lzplt_entry = dinfo->g.lzplt;
3862       dinfo->g.lzplt += LZPLT_NORMAL_SIZE;
3863       /* If this entry is the one that gets the resolver stub, account
3864 	 for the additional instruction.  */
3865       if (entry->lzplt_entry % BFINFDPIC_LZPLT_BLOCK_SIZE
3866 	  == BFINFDPIC_LZPLT_RESOLV_LOC)
3867 	dinfo->g.lzplt += LZPLT_RESOLVER_EXTRA;
3868     }
3869 
3870   return 1;
3871 }
3872 
3873 /* Follow indirect and warning hash entries so that each got entry
3874    points to the final symbol definition.  P must point to a pointer
3875    to the hash table we're traversing.  Since this traversal may
3876    modify the hash table, we set this pointer to NULL to indicate
3877    we've made a potentially-destructive change to the hash table, so
3878    the traversal must be restarted.  */
3879 static int
_bfinfdpic_resolve_final_relocs_info(void ** entryp,void * p)3880 _bfinfdpic_resolve_final_relocs_info (void **entryp, void *p)
3881 {
3882   struct bfinfdpic_relocs_info *entry = *entryp;
3883   htab_t *htab = p;
3884 
3885   if (entry->symndx == -1)
3886     {
3887       struct elf_link_hash_entry *h = entry->d.h;
3888       struct bfinfdpic_relocs_info *oentry;
3889 
3890       while (h->root.type == bfd_link_hash_indirect
3891 	     || h->root.type == bfd_link_hash_warning)
3892 	h = (struct elf_link_hash_entry *)h->root.u.i.link;
3893 
3894       if (entry->d.h == h)
3895 	return 1;
3896 
3897       oentry = bfinfdpic_relocs_info_for_global (*htab, 0, h, entry->addend,
3898 						NO_INSERT);
3899 
3900       if (oentry)
3901 	{
3902 	  /* Merge the two entries.  */
3903 	  bfinfdpic_pic_merge_early_relocs_info (oentry, entry);
3904 	  htab_clear_slot (*htab, entryp);
3905 	  return 1;
3906 	}
3907 
3908       entry->d.h = h;
3909 
3910       /* If we can't find this entry with the new bfd hash, re-insert
3911 	 it, and get the traversal restarted.  */
3912       if (! htab_find (*htab, entry))
3913 	{
3914 	  htab_clear_slot (*htab, entryp);
3915 	  entryp = htab_find_slot (*htab, entry, INSERT);
3916 	  if (! *entryp)
3917 	    *entryp = entry;
3918 	  /* Abort the traversal, since the whole table may have
3919 	     moved, and leave it up to the parent to restart the
3920 	     process.  */
3921 	  *(htab_t *)p = NULL;
3922 	  return 0;
3923 	}
3924     }
3925 
3926   return 1;
3927 }
3928 
3929 /* Set the sizes of the dynamic sections.  */
3930 
3931 static bfd_boolean
elf32_bfinfdpic_size_dynamic_sections(bfd * output_bfd,struct bfd_link_info * info)3932 elf32_bfinfdpic_size_dynamic_sections (bfd *output_bfd,
3933 				      struct bfd_link_info *info)
3934 {
3935   bfd *dynobj;
3936   asection *s;
3937   struct _bfinfdpic_dynamic_got_plt_info gpinfo;
3938   bfd_signed_vma odd;
3939   bfd_vma limit;
3940 
3941   dynobj = elf_hash_table (info)->dynobj;
3942   BFD_ASSERT (dynobj != NULL);
3943 
3944   if (elf_hash_table (info)->dynamic_sections_created)
3945     {
3946       /* Set the contents of the .interp section to the interpreter.  */
3947       if (info->executable)
3948 	{
3949 	  s = bfd_get_section_by_name (dynobj, ".interp");
3950 	  BFD_ASSERT (s != NULL);
3951 	  s->size = sizeof ELF_DYNAMIC_INTERPRETER;
3952 	  s->contents = (bfd_byte *) ELF_DYNAMIC_INTERPRETER;
3953 	}
3954     }
3955 
3956   memset (&gpinfo, 0, sizeof (gpinfo));
3957   gpinfo.g.info = info;
3958 
3959   for (;;)
3960     {
3961       htab_t relocs = bfinfdpic_relocs_info (info);
3962 
3963       htab_traverse (relocs, _bfinfdpic_resolve_final_relocs_info, &relocs);
3964 
3965       if (relocs == bfinfdpic_relocs_info (info))
3966 	break;
3967     }
3968 
3969   htab_traverse (bfinfdpic_relocs_info (info), _bfinfdpic_count_got_plt_entries,
3970 		 &gpinfo.g);
3971 
3972   odd = 12;
3973   /* Compute the total size taken by entries in the 18-bit range,
3974      to tell how many PLT function descriptors we can bring into it
3975      without causing it to overflow.  */
3976   limit = odd + gpinfo.g.got17m4 + gpinfo.g.fd17m4;
3977   if (limit < (bfd_vma)1 << 18)
3978     limit = ((bfd_vma)1 << 18) - limit;
3979   else
3980     limit = 0;
3981   if (gpinfo.g.fdplt < limit)
3982     limit = gpinfo.g.fdplt;
3983 
3984   /* Determine the ranges of GOT offsets that we can use for each
3985      range of addressing modes.  */
3986   odd = _bfinfdpic_compute_got_alloc_data (&gpinfo.got17m4,
3987 					  0,
3988 					  odd,
3989 					  16,
3990 					  gpinfo.g.got17m4,
3991 					  gpinfo.g.fd17m4,
3992 					  limit,
3993 					  (bfd_vma)1 << (18-1));
3994   odd = _bfinfdpic_compute_got_alloc_data (&gpinfo.gothilo,
3995 					  gpinfo.got17m4.min,
3996 					  odd,
3997 					  gpinfo.got17m4.max,
3998 					  gpinfo.g.gothilo,
3999 					  gpinfo.g.fdhilo,
4000 					  gpinfo.g.fdplt - gpinfo.got17m4.fdplt,
4001 					  (bfd_vma)1 << (32-1));
4002 
4003   /* Now assign (most) GOT offsets.  */
4004   htab_traverse (bfinfdpic_relocs_info (info), _bfinfdpic_assign_got_entries,
4005 		 &gpinfo);
4006 
4007   bfinfdpic_got_section (info)->size = gpinfo.gothilo.max
4008     - gpinfo.gothilo.min
4009     /* If an odd word is the last word of the GOT, we don't need this
4010        word to be part of the GOT.  */
4011     - (odd + 4 == gpinfo.gothilo.max ? 4 : 0);
4012   if (bfinfdpic_got_section (info)->size == 0)
4013     bfinfdpic_got_section (info)->flags |= SEC_EXCLUDE;
4014   else if (bfinfdpic_got_section (info)->size == 12
4015 	   && ! elf_hash_table (info)->dynamic_sections_created)
4016     {
4017       bfinfdpic_got_section (info)->flags |= SEC_EXCLUDE;
4018       bfinfdpic_got_section (info)->size = 0;
4019     }
4020   else
4021     {
4022       bfinfdpic_got_section (info)->contents =
4023 	(bfd_byte *) bfd_zalloc (dynobj,
4024 				 bfinfdpic_got_section (info)->size);
4025       if (bfinfdpic_got_section (info)->contents == NULL)
4026 	return FALSE;
4027     }
4028 
4029   if (elf_hash_table (info)->dynamic_sections_created)
4030     /* Subtract the number of lzplt entries, since those will generate
4031        relocations in the pltrel section.  */
4032     bfinfdpic_gotrel_section (info)->size =
4033       (gpinfo.g.relocs - gpinfo.g.lzplt / LZPLT_NORMAL_SIZE)
4034       * get_elf_backend_data (output_bfd)->s->sizeof_rel;
4035   else
4036     BFD_ASSERT (gpinfo.g.relocs == 0);
4037   if (bfinfdpic_gotrel_section (info)->size == 0)
4038     bfinfdpic_gotrel_section (info)->flags |= SEC_EXCLUDE;
4039   else
4040     {
4041       bfinfdpic_gotrel_section (info)->contents =
4042 	(bfd_byte *) bfd_zalloc (dynobj,
4043 				 bfinfdpic_gotrel_section (info)->size);
4044       if (bfinfdpic_gotrel_section (info)->contents == NULL)
4045 	return FALSE;
4046     }
4047 
4048   bfinfdpic_gotfixup_section (info)->size = (gpinfo.g.fixups + 1) * 4;
4049   if (bfinfdpic_gotfixup_section (info)->size == 0)
4050     bfinfdpic_gotfixup_section (info)->flags |= SEC_EXCLUDE;
4051   else
4052     {
4053       bfinfdpic_gotfixup_section (info)->contents =
4054 	(bfd_byte *) bfd_zalloc (dynobj,
4055 				 bfinfdpic_gotfixup_section (info)->size);
4056       if (bfinfdpic_gotfixup_section (info)->contents == NULL)
4057 	return FALSE;
4058     }
4059 
4060   if (elf_hash_table (info)->dynamic_sections_created)
4061     {
4062       bfinfdpic_pltrel_section (info)->size =
4063 	gpinfo.g.lzplt / LZPLT_NORMAL_SIZE * get_elf_backend_data (output_bfd)->s->sizeof_rel;
4064       if (bfinfdpic_pltrel_section (info)->size == 0)
4065 	bfinfdpic_pltrel_section (info)->flags |= SEC_EXCLUDE;
4066       else
4067 	{
4068 	  bfinfdpic_pltrel_section (info)->contents =
4069 	    (bfd_byte *) bfd_zalloc (dynobj,
4070 				     bfinfdpic_pltrel_section (info)->size);
4071 	  if (bfinfdpic_pltrel_section (info)->contents == NULL)
4072 	    return FALSE;
4073 	}
4074     }
4075 
4076   /* Add 4 bytes for every block of at most 65535 lazy PLT entries,
4077      such that there's room for the additional instruction needed to
4078      call the resolver.  Since _bfinfdpic_assign_got_entries didn't
4079      account for them, our block size is 4 bytes smaller than the real
4080      block size.  */
4081   if (elf_hash_table (info)->dynamic_sections_created)
4082     {
4083       bfinfdpic_plt_section (info)->size = gpinfo.g.lzplt
4084 	+ ((gpinfo.g.lzplt + (BFINFDPIC_LZPLT_BLOCK_SIZE - 4) - LZPLT_NORMAL_SIZE)
4085 	   / (BFINFDPIC_LZPLT_BLOCK_SIZE - 4) * LZPLT_RESOLVER_EXTRA);
4086     }
4087 
4088   /* Reset it, such that _bfinfdpic_assign_plt_entries() can use it to
4089      actually assign lazy PLT entries addresses.  */
4090   gpinfo.g.lzplt = 0;
4091 
4092   /* Save information that we're going to need to generate GOT and PLT
4093      entries.  */
4094   bfinfdpic_got_initial_offset (info) = -gpinfo.gothilo.min;
4095 
4096   if (get_elf_backend_data (output_bfd)->want_got_sym)
4097     elf_hash_table (info)->hgot->root.u.def.value
4098       += bfinfdpic_got_initial_offset (info);
4099 
4100   if (elf_hash_table (info)->dynamic_sections_created)
4101     bfinfdpic_plt_initial_offset (info) =
4102       bfinfdpic_plt_section (info)->size;
4103 
4104   htab_traverse (bfinfdpic_relocs_info (info), _bfinfdpic_assign_plt_entries,
4105 		 &gpinfo);
4106 
4107   /* Allocate the PLT section contents only after
4108      _bfinfdpic_assign_plt_entries has a chance to add the size of the
4109      non-lazy PLT entries.  */
4110   if (elf_hash_table (info)->dynamic_sections_created)
4111     {
4112       if (bfinfdpic_plt_section (info)->size == 0)
4113 	bfinfdpic_plt_section (info)->flags |= SEC_EXCLUDE;
4114       else
4115 	{
4116 	  bfinfdpic_plt_section (info)->contents =
4117 	    (bfd_byte *) bfd_zalloc (dynobj,
4118 				     bfinfdpic_plt_section (info)->size);
4119 	  if (bfinfdpic_plt_section (info)->contents == NULL)
4120 	    return FALSE;
4121 	}
4122     }
4123 
4124   if (elf_hash_table (info)->dynamic_sections_created)
4125     {
4126       if (bfinfdpic_got_section (info)->size)
4127 	if (!_bfd_elf_add_dynamic_entry (info, DT_PLTGOT, 0))
4128 	  return FALSE;
4129 
4130       if (bfinfdpic_pltrel_section (info)->size)
4131 	if (!_bfd_elf_add_dynamic_entry (info, DT_PLTRELSZ, 0)
4132 	    || !_bfd_elf_add_dynamic_entry (info, DT_PLTREL, DT_REL)
4133 	    || !_bfd_elf_add_dynamic_entry (info, DT_JMPREL, 0))
4134 	  return FALSE;
4135 
4136       if (bfinfdpic_gotrel_section (info)->size)
4137 	if (!_bfd_elf_add_dynamic_entry (info, DT_REL, 0)
4138 	    || !_bfd_elf_add_dynamic_entry (info, DT_RELSZ, 0)
4139 	    || !_bfd_elf_add_dynamic_entry (info, DT_RELENT,
4140 					    sizeof (Elf32_External_Rel)))
4141 	  return FALSE;
4142     }
4143 
4144   return TRUE;
4145 }
4146 
4147 static bfd_boolean
elf32_bfinfdpic_always_size_sections(bfd * output_bfd,struct bfd_link_info * info)4148 elf32_bfinfdpic_always_size_sections (bfd *output_bfd,
4149 				     struct bfd_link_info *info)
4150 {
4151   if (!info->relocatable)
4152     {
4153       struct elf_link_hash_entry *h;
4154       asection *sec;
4155 
4156       /* Force a PT_GNU_STACK segment to be created.  */
4157       if (! elf_tdata (output_bfd)->stack_flags)
4158 	elf_tdata (output_bfd)->stack_flags = PF_R | PF_W | PF_X;
4159 
4160       /* Define __stacksize if it's not defined yet.  */
4161       h = elf_link_hash_lookup (elf_hash_table (info), "__stacksize",
4162 				FALSE, FALSE, FALSE);
4163       if (! h || h->root.type != bfd_link_hash_defined
4164 	  || h->type != STT_OBJECT
4165 	  || !h->def_regular)
4166 	{
4167 	  struct bfd_link_hash_entry *bh = NULL;
4168 
4169 	  if (!(_bfd_generic_link_add_one_symbol
4170 		(info, output_bfd, "__stacksize",
4171 		 BSF_GLOBAL, bfd_abs_section_ptr, DEFAULT_STACK_SIZE,
4172 		 (const char *) NULL, FALSE,
4173 		 get_elf_backend_data (output_bfd)->collect, &bh)))
4174 	    return FALSE;
4175 
4176 	  h = (struct elf_link_hash_entry *) bh;
4177 	  h->def_regular = 1;
4178 	  h->type = STT_OBJECT;
4179 	}
4180 
4181       /* Create a stack section, and set its alignment.  */
4182       sec = bfd_make_section (output_bfd, ".stack");
4183 
4184       if (sec == NULL
4185 	  || ! bfd_set_section_alignment (output_bfd, sec, 3))
4186 	return FALSE;
4187     }
4188 
4189   return TRUE;
4190 }
4191 
4192 static bfd_boolean
elf32_bfinfdpic_modify_segment_map(bfd * output_bfd,struct bfd_link_info * info)4193 elf32_bfinfdpic_modify_segment_map (bfd *output_bfd,
4194 				   struct bfd_link_info *info)
4195 {
4196   struct elf_segment_map *m;
4197 
4198   /* objcopy and strip preserve what's already there using
4199      elf32_bfinfdpic_copy_private_bfd_data ().  */
4200   if (! info)
4201     return TRUE;
4202 
4203   for (m = elf_tdata (output_bfd)->segment_map; m != NULL; m = m->next)
4204     if (m->p_type == PT_GNU_STACK)
4205       break;
4206 
4207   if (m)
4208     {
4209       asection *sec = bfd_get_section_by_name (output_bfd, ".stack");
4210       struct elf_link_hash_entry *h;
4211 
4212       if (sec)
4213 	{
4214 	  /* Obtain the pointer to the __stacksize symbol.  */
4215 	  h = elf_link_hash_lookup (elf_hash_table (info), "__stacksize",
4216 				    FALSE, FALSE, FALSE);
4217 	  while (h->root.type == bfd_link_hash_indirect
4218 		 || h->root.type == bfd_link_hash_warning)
4219 	    h = (struct elf_link_hash_entry *)h->root.u.i.link;
4220 	  BFD_ASSERT (h->root.type == bfd_link_hash_defined);
4221 
4222 	  /* Set the section size from the symbol value.  We
4223 	     intentionally ignore the symbol section.  */
4224 	  if (h->root.type == bfd_link_hash_defined)
4225 	    sec->size = h->root.u.def.value;
4226 	  else
4227 	    sec->size = DEFAULT_STACK_SIZE;
4228 
4229 	  /* Add the stack section to the PT_GNU_STACK segment,
4230 	     such that its size and alignment requirements make it
4231 	     to the segment.  */
4232 	  m->sections[m->count] = sec;
4233 	  m->count++;
4234 	}
4235     }
4236 
4237   return TRUE;
4238 }
4239 
4240 static bfd_boolean
elf32_bfinfdpic_finish_dynamic_sections(bfd * output_bfd,struct bfd_link_info * info)4241 elf32_bfinfdpic_finish_dynamic_sections (bfd *output_bfd,
4242 					struct bfd_link_info *info)
4243 {
4244   bfd *dynobj;
4245   asection *sdyn;
4246 
4247   dynobj = elf_hash_table (info)->dynobj;
4248 
4249   if (bfinfdpic_got_section (info))
4250     {
4251       BFD_ASSERT (bfinfdpic_gotrel_section (info)->size
4252 		  == (bfinfdpic_gotrel_section (info)->reloc_count
4253 		      * sizeof (Elf32_External_Rel)));
4254 
4255       if (bfinfdpic_gotfixup_section (info))
4256 	{
4257 	  struct elf_link_hash_entry *hgot = elf_hash_table (info)->hgot;
4258 	  bfd_vma got_value = hgot->root.u.def.value
4259 	    + hgot->root.u.def.section->output_section->vma
4260 	    + hgot->root.u.def.section->output_offset;
4261 
4262 	  _bfinfdpic_add_rofixup (output_bfd, bfinfdpic_gotfixup_section (info),
4263 				 got_value, 0);
4264 
4265 	  if (bfinfdpic_gotfixup_section (info)->size
4266 	      != (bfinfdpic_gotfixup_section (info)->reloc_count * 4))
4267 	    {
4268 	      (*_bfd_error_handler)
4269 		("LINKER BUG: .rofixup section size mismatch");
4270 	      return FALSE;
4271 	    }
4272 	}
4273     }
4274   if (elf_hash_table (info)->dynamic_sections_created)
4275     {
4276       BFD_ASSERT (bfinfdpic_pltrel_section (info)->size
4277 		  == (bfinfdpic_pltrel_section (info)->reloc_count
4278 		      * sizeof (Elf32_External_Rel)));
4279     }
4280 
4281   sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
4282 
4283   if (elf_hash_table (info)->dynamic_sections_created)
4284     {
4285       Elf32_External_Dyn * dyncon;
4286       Elf32_External_Dyn * dynconend;
4287 
4288       BFD_ASSERT (sdyn != NULL);
4289 
4290       dyncon = (Elf32_External_Dyn *) sdyn->contents;
4291       dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
4292 
4293       for (; dyncon < dynconend; dyncon++)
4294 	{
4295 	  Elf_Internal_Dyn dyn;
4296 
4297 	  bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
4298 
4299 	  switch (dyn.d_tag)
4300 	    {
4301 	    default:
4302 	      break;
4303 
4304 	    case DT_PLTGOT:
4305 	      dyn.d_un.d_ptr = bfinfdpic_got_section (info)->output_section->vma
4306 		+ bfinfdpic_got_section (info)->output_offset
4307 		+ bfinfdpic_got_initial_offset (info);
4308 	      bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
4309 	      break;
4310 
4311 	    case DT_JMPREL:
4312 	      dyn.d_un.d_ptr = bfinfdpic_pltrel_section (info)
4313 		->output_section->vma
4314 		+ bfinfdpic_pltrel_section (info)->output_offset;
4315 	      bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
4316 	      break;
4317 
4318 	    case DT_PLTRELSZ:
4319 	      dyn.d_un.d_val = bfinfdpic_pltrel_section (info)->size;
4320 	      bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
4321 	      break;
4322 	    }
4323 	}
4324     }
4325 
4326   return TRUE;
4327 }
4328 
4329 /* Adjust a symbol defined by a dynamic object and referenced by a
4330    regular object.  */
4331 
4332 static bfd_boolean
elf32_bfinfdpic_adjust_dynamic_symbol(struct bfd_link_info * info ATTRIBUTE_UNUSED,struct elf_link_hash_entry * h ATTRIBUTE_UNUSED)4333 elf32_bfinfdpic_adjust_dynamic_symbol
4334 (struct bfd_link_info *info ATTRIBUTE_UNUSED,
4335  struct elf_link_hash_entry *h ATTRIBUTE_UNUSED)
4336 {
4337   bfd * dynobj;
4338 
4339   dynobj = elf_hash_table (info)->dynobj;
4340 
4341   /* Make sure we know what is going on here.  */
4342   BFD_ASSERT (dynobj != NULL
4343 	      && (h->u.weakdef != NULL
4344 		  || (h->def_dynamic
4345 		      && h->ref_regular
4346 		      && !h->def_regular)));
4347 
4348   /* If this is a weak symbol, and there is a real definition, the
4349      processor independent code will have arranged for us to see the
4350      real definition first, and we can just use the same value.  */
4351   if (h->u.weakdef != NULL)
4352     {
4353       BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
4354 		  || h->u.weakdef->root.type == bfd_link_hash_defweak);
4355       h->root.u.def.section = h->u.weakdef->root.u.def.section;
4356       h->root.u.def.value = h->u.weakdef->root.u.def.value;
4357     }
4358 
4359   return TRUE;
4360 }
4361 
4362 /* Perform any actions needed for dynamic symbols.  */
4363 
4364 static bfd_boolean
elf32_bfinfdpic_finish_dynamic_symbol(bfd * output_bfd ATTRIBUTE_UNUSED,struct bfd_link_info * info ATTRIBUTE_UNUSED,struct elf_link_hash_entry * h ATTRIBUTE_UNUSED,Elf_Internal_Sym * sym ATTRIBUTE_UNUSED)4365 elf32_bfinfdpic_finish_dynamic_symbol
4366 (bfd *output_bfd ATTRIBUTE_UNUSED,
4367  struct bfd_link_info *info ATTRIBUTE_UNUSED,
4368  struct elf_link_hash_entry *h ATTRIBUTE_UNUSED,
4369  Elf_Internal_Sym *sym ATTRIBUTE_UNUSED)
4370 {
4371   return TRUE;
4372 }
4373 
4374 /* Decide whether to attempt to turn absptr or lsda encodings in
4375    shared libraries into pcrel within the given input section.  */
4376 
4377 static bfd_boolean
bfinfdpic_elf_use_relative_eh_frame(bfd * input_bfd ATTRIBUTE_UNUSED,struct bfd_link_info * info ATTRIBUTE_UNUSED,asection * eh_frame_section ATTRIBUTE_UNUSED)4378 bfinfdpic_elf_use_relative_eh_frame
4379 (bfd *input_bfd ATTRIBUTE_UNUSED,
4380  struct bfd_link_info *info ATTRIBUTE_UNUSED,
4381  asection *eh_frame_section ATTRIBUTE_UNUSED)
4382 {
4383   /* We can't use PC-relative encodings in FDPIC binaries, in general.  */
4384   return FALSE;
4385 }
4386 
4387 /* Adjust the contents of an eh_frame_hdr section before they're output.  */
4388 
4389 static bfd_byte
bfinfdpic_elf_encode_eh_address(bfd * abfd,struct bfd_link_info * info,asection * osec,bfd_vma offset,asection * loc_sec,bfd_vma loc_offset,bfd_vma * encoded)4390 bfinfdpic_elf_encode_eh_address (bfd *abfd,
4391 				struct bfd_link_info *info,
4392 				asection *osec, bfd_vma offset,
4393 				asection *loc_sec, bfd_vma loc_offset,
4394 				bfd_vma *encoded)
4395 {
4396   struct elf_link_hash_entry *h;
4397 
4398   h = elf_hash_table (info)->hgot;
4399   BFD_ASSERT (h && h->root.type == bfd_link_hash_defined);
4400 
4401   if (! h || (_bfinfdpic_osec_to_segment (abfd, osec)
4402 	      == _bfinfdpic_osec_to_segment (abfd, loc_sec->output_section)))
4403     return _bfd_elf_encode_eh_address (abfd, info, osec, offset,
4404 				       loc_sec, loc_offset, encoded);
4405 
4406   BFD_ASSERT (_bfinfdpic_osec_to_segment (abfd, osec)
4407 	      == (_bfinfdpic_osec_to_segment
4408 		  (abfd, h->root.u.def.section->output_section)));
4409 
4410   *encoded = osec->vma + offset
4411     - (h->root.u.def.value
4412        + h->root.u.def.section->output_section->vma
4413        + h->root.u.def.section->output_offset);
4414 
4415   return DW_EH_PE_datarel | DW_EH_PE_sdata4;
4416 }
4417 
4418 
4419 
4420 /* Look through the relocs for a section during the first phase.
4421 
4422    Besides handling virtual table relocs for gc, we have to deal with
4423    all sorts of PIC-related relocations.  We describe below the
4424    general plan on how to handle such relocations, even though we only
4425    collect information at this point, storing them in hash tables for
4426    perusal of later passes.
4427 
4428    32 relocations are propagated to the linker output when creating
4429    position-independent output.  LO16 and HI16 relocations are not
4430    supposed to be encountered in this case.
4431 
4432    LABEL16 should always be resolvable by the linker, since it's only
4433    used by branches.
4434 
4435    LABEL24, on the other hand, is used by calls.  If it turns out that
4436    the target of a call is a dynamic symbol, a PLT entry must be
4437    created for it, which triggers the creation of a private function
4438    descriptor and, unless lazy binding is disabled, a lazy PLT entry.
4439 
4440    GPREL relocations require the referenced symbol to be in the same
4441    segment as _gp, but this can only be checked later.
4442 
4443    All GOT, GOTOFF and FUNCDESC relocations require a .got section to
4444    exist.  LABEL24 might as well, since it may require a PLT entry,
4445    that will require a got.
4446 
4447    Non-FUNCDESC GOT relocations require a GOT entry to be created
4448    regardless of whether the symbol is dynamic.  However, since a
4449    global symbol that turns out to not be exported may have the same
4450    address of a non-dynamic symbol, we don't assign GOT entries at
4451    this point, such that we can share them in this case.  A relocation
4452    for the GOT entry always has to be created, be it to offset a
4453    private symbol by the section load address, be it to get the symbol
4454    resolved dynamically.
4455 
4456    FUNCDESC GOT relocations require a GOT entry to be created, and
4457    handled as if a FUNCDESC relocation was applied to the GOT entry in
4458    an object file.
4459 
4460    FUNCDESC relocations referencing a symbol that turns out to NOT be
4461    dynamic cause a private function descriptor to be created.  The
4462    FUNCDESC relocation then decays to a 32 relocation that points at
4463    the private descriptor.  If the symbol is dynamic, the FUNCDESC
4464    relocation is propagated to the linker output, such that the
4465    dynamic linker creates the canonical descriptor, pointing to the
4466    dynamically-resolved definition of the function.
4467 
4468    Non-FUNCDESC GOTOFF relocations must always refer to non-dynamic
4469    symbols that are assigned to the same segment as the GOT, but we
4470    can only check this later, after we know the complete set of
4471    symbols defined and/or exported.
4472 
4473    FUNCDESC GOTOFF relocations require a function descriptor to be
4474    created and, unless lazy binding is disabled or the symbol is not
4475    dynamic, a lazy PLT entry.  Since we can't tell at this point
4476    whether a symbol is going to be dynamic, we have to decide later
4477    whether to create a lazy PLT entry or bind the descriptor directly
4478    to the private function.
4479 
4480    FUNCDESC_VALUE relocations are not supposed to be present in object
4481    files, but they may very well be simply propagated to the linker
4482    output, since they have no side effect.
4483 
4484 
4485    A function descriptor always requires a FUNCDESC_VALUE relocation.
4486    Whether it's in .plt.rel or not depends on whether lazy binding is
4487    enabled and on whether the referenced symbol is dynamic.
4488 
4489    The existence of a lazy PLT requires the resolverStub lazy PLT
4490    entry to be present.
4491 
4492 
4493    As for assignment of GOT, PLT and lazy PLT entries, and private
4494    descriptors, we might do them all sequentially, but we can do
4495    better than that.  For example, we can place GOT entries and
4496    private function descriptors referenced using 12-bit operands
4497    closer to the PIC register value, such that these relocations don't
4498    overflow.  Those that are only referenced with LO16 relocations
4499    could come next, but we may as well place PLT-required function
4500    descriptors in the 12-bit range to make them shorter.  Symbols
4501    referenced with LO16/HI16 may come next, but we may place
4502    additional function descriptors in the 16-bit range if we can
4503    reliably tell that we've already placed entries that are ever
4504    referenced with only LO16.  PLT entries are therefore generated as
4505    small as possible, while not introducing relocation overflows in
4506    GOT or FUNCDESC_GOTOFF relocations.  Lazy PLT entries could be
4507    generated before or after PLT entries, but not intermingled with
4508    them, such that we can have more lazy PLT entries in range for a
4509    branch to the resolverStub.  The resolverStub should be emitted at
4510    the most distant location from the first lazy PLT entry such that
4511    it's still in range for a branch, or closer, if there isn't a need
4512    for so many lazy PLT entries.  Additional lazy PLT entries may be
4513    emitted after the resolverStub, as long as branches are still in
4514    range.  If the branch goes out of range, longer lazy PLT entries
4515    are emitted.
4516 
4517    We could further optimize PLT and lazy PLT entries by giving them
4518    priority in assignment to closer-to-gr17 locations depending on the
4519    number of occurrences of references to them (assuming a function
4520    that's called more often is more important for performance, so its
4521    PLT entry should be faster), or taking hints from the compiler.
4522    Given infinite time and money... :-)  */
4523 
4524 static bfd_boolean
bfinfdpic_check_relocs(bfd * abfd,struct bfd_link_info * info,asection * sec,const Elf_Internal_Rela * relocs)4525 bfinfdpic_check_relocs (bfd *abfd, struct bfd_link_info *info,
4526 			asection *sec, const Elf_Internal_Rela *relocs)
4527 {
4528   Elf_Internal_Shdr *symtab_hdr;
4529   struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
4530   const Elf_Internal_Rela *rel;
4531   const Elf_Internal_Rela *rel_end;
4532   bfd *dynobj;
4533   struct bfinfdpic_relocs_info *picrel;
4534 
4535   if (info->relocatable)
4536     return TRUE;
4537 
4538   symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
4539   sym_hashes = elf_sym_hashes (abfd);
4540   sym_hashes_end = sym_hashes + symtab_hdr->sh_size/sizeof(Elf32_External_Sym);
4541   if (!elf_bad_symtab (abfd))
4542     sym_hashes_end -= symtab_hdr->sh_info;
4543 
4544   dynobj = elf_hash_table (info)->dynobj;
4545   rel_end = relocs + sec->reloc_count;
4546   for (rel = relocs; rel < rel_end; rel++)
4547     {
4548       struct elf_link_hash_entry *h;
4549       unsigned long r_symndx;
4550 
4551       r_symndx = ELF32_R_SYM (rel->r_info);
4552       if (r_symndx < symtab_hdr->sh_info)
4553         h = NULL;
4554       else
4555         h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4556 
4557       switch (ELF32_R_TYPE (rel->r_info))
4558 	{
4559 	case R_BFIN_GOT17M4:
4560 	case R_BFIN_GOTHI:
4561 	case R_BFIN_GOTLO:
4562 	case R_BFIN_FUNCDESC_GOT17M4:
4563 	case R_BFIN_FUNCDESC_GOTHI:
4564 	case R_BFIN_FUNCDESC_GOTLO:
4565 	case R_BFIN_GOTOFF17M4:
4566 	case R_BFIN_GOTOFFHI:
4567 	case R_BFIN_GOTOFFLO:
4568 	case R_BFIN_FUNCDESC_GOTOFF17M4:
4569 	case R_BFIN_FUNCDESC_GOTOFFHI:
4570 	case R_BFIN_FUNCDESC_GOTOFFLO:
4571 	case R_BFIN_FUNCDESC:
4572 	case R_BFIN_FUNCDESC_VALUE:
4573 	  if (! IS_FDPIC (abfd))
4574 	    goto bad_reloc;
4575 	  /* Fall through.  */
4576 	case R_pcrel24:
4577 	case R_pcrel24_jump_l:
4578 	case R_byte4_data:
4579 	  if (IS_FDPIC (abfd) && ! dynobj)
4580 	    {
4581 	      elf_hash_table (info)->dynobj = dynobj = abfd;
4582 	      if (! _bfin_create_got_section (abfd, info))
4583 		return FALSE;
4584 	    }
4585 	  if (! IS_FDPIC (abfd))
4586 	    {
4587 	      picrel = NULL;
4588 	      break;
4589 	    }
4590 	  if (h != NULL)
4591 	    {
4592 	      if (h->dynindx == -1)
4593 		switch (ELF_ST_VISIBILITY (h->other))
4594 		  {
4595 		  case STV_INTERNAL:
4596 		  case STV_HIDDEN:
4597 		    break;
4598 		  default:
4599 		    bfd_elf_link_record_dynamic_symbol (info, h);
4600 		    break;
4601 		  }
4602 	      picrel
4603 		= bfinfdpic_relocs_info_for_global (bfinfdpic_relocs_info (info),
4604 						   abfd, h,
4605 						   rel->r_addend, INSERT);
4606 	    }
4607 	  else
4608 	    picrel = bfinfdpic_relocs_info_for_local (bfinfdpic_relocs_info
4609 						     (info), abfd, r_symndx,
4610 						     rel->r_addend, INSERT);
4611 	  if (! picrel)
4612 	    return FALSE;
4613 	  break;
4614 
4615 	default:
4616 	  picrel = NULL;
4617 	  break;
4618 	}
4619 
4620       switch (ELF32_R_TYPE (rel->r_info))
4621         {
4622 	case R_pcrel24:
4623 	case R_pcrel24_jump_l:
4624 	  if (IS_FDPIC (abfd))
4625 	    picrel->call = 1;
4626 	  break;
4627 
4628 	case R_BFIN_FUNCDESC_VALUE:
4629 	  picrel->relocsfdv++;
4630 	  if (bfd_get_section_flags (abfd, sec) & SEC_ALLOC)
4631 	    picrel->relocs32--;
4632 	  /* Fall through.  */
4633 
4634 	case R_byte4_data:
4635 	  if (! IS_FDPIC (abfd))
4636 	    break;
4637 
4638 	  picrel->sym = 1;
4639 	  if (bfd_get_section_flags (abfd, sec) & SEC_ALLOC)
4640 	    picrel->relocs32++;
4641 	  break;
4642 
4643 	case R_BFIN_GOT17M4:
4644 	  picrel->got17m4 = 1;
4645 	  break;
4646 
4647 	case R_BFIN_GOTHI:
4648 	case R_BFIN_GOTLO:
4649 	  picrel->gothilo = 1;
4650 	  break;
4651 
4652 	case R_BFIN_FUNCDESC_GOT17M4:
4653 	  picrel->fdgot17m4 = 1;
4654 	  break;
4655 
4656 	case R_BFIN_FUNCDESC_GOTHI:
4657 	case R_BFIN_FUNCDESC_GOTLO:
4658 	  picrel->fdgothilo = 1;
4659 	  break;
4660 
4661 	case R_BFIN_GOTOFF17M4:
4662 	case R_BFIN_GOTOFFHI:
4663 	case R_BFIN_GOTOFFLO:
4664 	  picrel->gotoff = 1;
4665 	  break;
4666 
4667 	case R_BFIN_FUNCDESC_GOTOFF17M4:
4668 	  picrel->fdgoff17m4 = 1;
4669 	  break;
4670 
4671 	case R_BFIN_FUNCDESC_GOTOFFHI:
4672 	case R_BFIN_FUNCDESC_GOTOFFLO:
4673 	  picrel->fdgoffhilo = 1;
4674 	  break;
4675 
4676 	case R_BFIN_FUNCDESC:
4677 	  picrel->fd = 1;
4678 	  picrel->relocsfd++;
4679 	  break;
4680 
4681         /* This relocation describes the C++ object vtable hierarchy.
4682            Reconstruct it for later use during GC.  */
4683         case R_BFIN_GNU_VTINHERIT:
4684           if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
4685             return FALSE;
4686           break;
4687 
4688         /* This relocation describes which C++ vtable entries are actually
4689            used.  Record for later use during GC.  */
4690         case R_BFIN_GNU_VTENTRY:
4691           if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
4692             return FALSE;
4693           break;
4694 
4695 	case R_huimm16:
4696 	case R_luimm16:
4697 	case R_pcrel12_jump_s:
4698 	case R_pcrel10:
4699 	  break;
4700 
4701 	default:
4702 	bad_reloc:
4703 	  (*_bfd_error_handler)
4704 	    (_("%B: unsupported relocation type %i"),
4705 	     abfd, ELF32_R_TYPE (rel->r_info));
4706 	  return FALSE;
4707         }
4708     }
4709 
4710   return TRUE;
4711 }
4712 
4713 /* Set the right machine number for a Blackfin ELF file.  */
4714 
4715 static bfd_boolean
elf32_bfin_object_p(bfd * abfd)4716 elf32_bfin_object_p (bfd *abfd)
4717 {
4718   bfd_default_set_arch_mach (abfd, bfd_arch_bfin, 0);
4719   return (((elf_elfheader (abfd)->e_flags & EF_BFIN_FDPIC) != 0)
4720 	  == (IS_FDPIC (abfd)));
4721 }
4722 
4723 static bfd_boolean
elf32_bfin_set_private_flags(bfd * abfd,flagword flags)4724 elf32_bfin_set_private_flags (bfd * abfd, flagword flags)
4725 {
4726   elf_elfheader (abfd)->e_flags = flags;
4727   elf_flags_init (abfd) = TRUE;
4728   return TRUE;
4729 }
4730 
4731 /* Copy backend specific data from one object module to another.  */
4732 
4733 static bfd_boolean
bfin_elf_copy_private_bfd_data(bfd * ibfd,bfd * obfd)4734 bfin_elf_copy_private_bfd_data (bfd *ibfd, bfd *obfd)
4735 {
4736   if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
4737       || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
4738     return TRUE;
4739 
4740   BFD_ASSERT (!elf_flags_init (obfd)
4741 	      || elf_elfheader (obfd)->e_flags == elf_elfheader (ibfd)->e_flags);
4742 
4743   elf_elfheader (obfd)->e_flags = elf_elfheader (ibfd)->e_flags;
4744   elf_flags_init (obfd) = TRUE;
4745   return TRUE;
4746 }
4747 
4748 static bfd_boolean
elf32_bfinfdpic_copy_private_bfd_data(bfd * ibfd,bfd * obfd)4749 elf32_bfinfdpic_copy_private_bfd_data (bfd *ibfd, bfd *obfd)
4750 {
4751   unsigned i;
4752 
4753   if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
4754       || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
4755     return TRUE;
4756 
4757   if (! bfin_elf_copy_private_bfd_data (ibfd, obfd))
4758     return FALSE;
4759 
4760   if (! elf_tdata (ibfd) || ! elf_tdata (ibfd)->phdr
4761       || ! elf_tdata (obfd) || ! elf_tdata (obfd)->phdr)
4762     return TRUE;
4763 
4764   /* Copy the stack size.  */
4765   for (i = 0; i < elf_elfheader (ibfd)->e_phnum; i++)
4766     if (elf_tdata (ibfd)->phdr[i].p_type == PT_GNU_STACK)
4767       {
4768 	Elf_Internal_Phdr *iphdr = &elf_tdata (ibfd)->phdr[i];
4769 
4770 	for (i = 0; i < elf_elfheader (obfd)->e_phnum; i++)
4771 	  if (elf_tdata (obfd)->phdr[i].p_type == PT_GNU_STACK)
4772 	    {
4773 	      memcpy (&elf_tdata (obfd)->phdr[i], iphdr, sizeof (*iphdr));
4774 
4775 	      /* Rewrite the phdrs, since we're only called after they
4776 		 were first written.  */
4777 	      if (bfd_seek (obfd, (bfd_signed_vma) get_elf_backend_data (obfd)
4778 			    ->s->sizeof_ehdr, SEEK_SET) != 0
4779 		  || get_elf_backend_data (obfd)->s
4780 		  ->write_out_phdrs (obfd, elf_tdata (obfd)->phdr,
4781 				     elf_elfheader (obfd)->e_phnum) != 0)
4782 		return FALSE;
4783 	      break;
4784 	    }
4785 
4786 	break;
4787       }
4788 
4789   return TRUE;
4790 }
4791 
4792 
4793 /* Display the flags field.  */
4794 static bfd_boolean
elf32_bfin_print_private_bfd_data(bfd * abfd,PTR ptr)4795 elf32_bfin_print_private_bfd_data (bfd * abfd, PTR ptr)
4796 {
4797   FILE *file = (FILE *) ptr;
4798   flagword flags;
4799 
4800   BFD_ASSERT (abfd != NULL && ptr != NULL);
4801 
4802   /* Print normal ELF private data.  */
4803   _bfd_elf_print_private_bfd_data (abfd, ptr);
4804 
4805   flags = elf_elfheader (abfd)->e_flags;
4806 
4807   /* xgettext:c-format */
4808   fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
4809 
4810   if (flags & EF_BFIN_PIC)
4811     fprintf (file, " -fpic");
4812 
4813   if (flags & EF_BFIN_FDPIC)
4814     fprintf (file, " -mfdpic");
4815 
4816   fputc ('\n', file);
4817 
4818   return TRUE;
4819 }
4820 
4821 /* Merge backend specific data from an object file to the output
4822    object file when linking.  */
4823 
4824 static bfd_boolean
elf32_bfin_merge_private_bfd_data(bfd * ibfd,bfd * obfd)4825 elf32_bfin_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
4826 {
4827   flagword old_flags, old_partial;
4828   flagword new_flags, new_partial;
4829   bfd_boolean error = FALSE;
4830 
4831   new_flags = elf_elfheader (ibfd)->e_flags;
4832   old_flags = elf_elfheader (obfd)->e_flags;
4833 
4834   if (new_flags & EF_BFIN_FDPIC)
4835     new_flags &= ~EF_BFIN_PIC;
4836 
4837 #ifdef DEBUG
4838   (*_bfd_error_handler) ("old_flags = 0x%.8lx, new_flags = 0x%.8lx, init = %s, filename = %s",
4839 			 old_flags, new_flags, elf_flags_init (obfd) ? "yes" : "no",
4840 			 bfd_get_filename (ibfd));
4841 #endif
4842 
4843   if (!elf_flags_init (obfd))			/* First call, no flags set.  */
4844     {
4845       elf_flags_init (obfd) = TRUE;
4846       old_flags = new_flags;
4847     }
4848 
4849   else if (new_flags == old_flags)		/* Compatible flags are ok.  */
4850     ;
4851 
4852   else						/* Possibly incompatible flags.  */
4853     {
4854       /* We don't have to do anything if the pic flags are the same, or the new
4855          module(s) were compiled with -mlibrary-pic.  */
4856       new_partial = (new_flags & EF_BFIN_PIC_FLAGS);
4857       old_partial = (old_flags & EF_BFIN_PIC_FLAGS);
4858       if (new_partial == old_partial)
4859 	;
4860 
4861       /* If we have mixtures of -fpic and -fPIC, or in both bits.  */
4862       else if (new_partial != 0 && old_partial != 0)
4863 	old_flags |= new_partial;
4864 
4865       /* One module was compiled for pic and the other was not, see if we have
4866          had any relocations that are not pic-safe.  */
4867       else
4868 	old_flags |= new_partial;
4869 
4870     }
4871 
4872   /* Update the old flags now with changes made above.  */
4873   elf_elfheader (obfd)->e_flags = old_flags;
4874 
4875   if (((new_flags & EF_BFIN_FDPIC) == 0)
4876       != (! IS_FDPIC (ibfd)))
4877     {
4878       error = TRUE;
4879       if (IS_FDPIC (obfd))
4880 	(*_bfd_error_handler)
4881 	  (_("%s: cannot link non-fdpic object file into fdpic executable"),
4882 	   bfd_get_filename (ibfd));
4883       else
4884 	(*_bfd_error_handler)
4885 	  (_("%s: cannot link fdpic object file into non-fdpic executable"),
4886 	   bfd_get_filename (ibfd));
4887     }
4888 
4889   if (error)
4890     bfd_set_error (bfd_error_bad_value);
4891 
4892   return !error;
4893 }
4894 
4895 /* bfin ELF linker hash entry.  */
4896 
4897 struct bfin_link_hash_entry
4898 {
4899   struct elf_link_hash_entry root;
4900 
4901   /* Number of PC relative relocs copied for this symbol.  */
4902   struct bfin_pcrel_relocs_copied *pcrel_relocs_copied;
4903 };
4904 
4905 /* bfin ELF linker hash table.  */
4906 
4907 struct bfin_link_hash_table
4908 {
4909   struct elf_link_hash_table root;
4910 
4911   /* Small local sym to section mapping cache.  */
4912   struct sym_sec_cache sym_sec;
4913 };
4914 
4915 #define bfin_hash_entry(ent) ((struct bfin_link_hash_entry *) (ent))
4916 
4917 static struct bfd_hash_entry *
bfin_link_hash_newfunc(struct bfd_hash_entry * entry,struct bfd_hash_table * table,const char * string)4918 bfin_link_hash_newfunc (struct bfd_hash_entry *entry,
4919 			struct bfd_hash_table *table, const char *string)
4920 {
4921   struct bfd_hash_entry *ret = entry;
4922 
4923   /* Allocate the structure if it has not already been allocated by a
4924      subclass.  */
4925   if (ret == NULL)
4926     ret = bfd_hash_allocate (table, sizeof (struct bfin_link_hash_entry));
4927   if (ret == NULL)
4928     return ret;
4929 
4930   /* Call the allocation method of the superclass.  */
4931   ret = _bfd_elf_link_hash_newfunc (ret, table, string);
4932   if (ret != NULL)
4933     bfin_hash_entry (ret)->pcrel_relocs_copied = NULL;
4934 
4935   return ret;
4936 }
4937 
4938 /* Create an bfin ELF linker hash table.  */
4939 
4940 static struct bfd_link_hash_table *
bfin_link_hash_table_create(bfd * abfd)4941 bfin_link_hash_table_create (bfd * abfd)
4942 {
4943   struct bfin_link_hash_table *ret;
4944   bfd_size_type amt = sizeof (struct bfin_link_hash_table);
4945 
4946   ret = bfd_zalloc (abfd, amt);
4947   if (ret == NULL)
4948     return NULL;
4949 
4950   if (!_bfd_elf_link_hash_table_init (&ret->root, abfd,
4951 				      bfin_link_hash_newfunc,
4952 				      sizeof (struct elf_link_hash_entry)))
4953     {
4954       free (ret);
4955       return NULL;
4956     }
4957 
4958   ret->sym_sec.abfd = NULL;
4959 
4960   return &ret->root.root;
4961 }
4962 
4963 /* The size in bytes of an entry in the procedure linkage table.  */
4964 
4965 /* Finish up the dynamic sections.  */
4966 
4967 static bfd_boolean
bfin_finish_dynamic_sections(bfd * output_bfd ATTRIBUTE_UNUSED,struct bfd_link_info * info)4968 bfin_finish_dynamic_sections (bfd * output_bfd ATTRIBUTE_UNUSED,
4969 				  struct bfd_link_info *info)
4970 {
4971   bfd *dynobj;
4972   asection *sdyn;
4973 
4974   dynobj = elf_hash_table (info)->dynobj;
4975 
4976   sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
4977 
4978   if (elf_hash_table (info)->dynamic_sections_created)
4979     {
4980       Elf32_External_Dyn *dyncon, *dynconend;
4981 
4982       BFD_ASSERT (sdyn != NULL);
4983 
4984       dyncon = (Elf32_External_Dyn *) sdyn->contents;
4985       dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
4986       for (; dyncon < dynconend; dyncon++)
4987 	{
4988 	  Elf_Internal_Dyn dyn;
4989 
4990 	  bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
4991 
4992 	}
4993 
4994     }
4995   return TRUE;
4996 }
4997 
4998 /* Finish up dynamic symbol handling.  We set the contents of various
4999    dynamic sections here.  */
5000 
5001 static bfd_boolean
bfin_finish_dynamic_symbol(bfd * output_bfd,struct bfd_link_info * info,struct elf_link_hash_entry * h,Elf_Internal_Sym * sym)5002 bfin_finish_dynamic_symbol (bfd * output_bfd,
5003 				struct bfd_link_info *info,
5004 				struct elf_link_hash_entry *h,
5005 				Elf_Internal_Sym * sym)
5006 {
5007   bfd *dynobj;
5008 
5009   dynobj = elf_hash_table (info)->dynobj;
5010 
5011   if (h->got.offset != (bfd_vma) - 1)
5012     {
5013       asection *sgot;
5014       asection *srela;
5015       Elf_Internal_Rela rela;
5016       bfd_byte *loc;
5017 
5018       /* This symbol has an entry in the global offset table.
5019          Set it up.  */
5020 
5021       sgot = bfd_get_section_by_name (dynobj, ".got");
5022       srela = bfd_get_section_by_name (dynobj, ".rela.got");
5023       BFD_ASSERT (sgot != NULL && srela != NULL);
5024 
5025       rela.r_offset = (sgot->output_section->vma
5026 		       + sgot->output_offset
5027 		       + (h->got.offset & ~(bfd_vma) 1));
5028 
5029       /* If this is a -Bsymbolic link, and the symbol is defined
5030          locally, we just want to emit a RELATIVE reloc.  Likewise if
5031          the symbol was forced to be local because of a version file.
5032          The entry in the global offset table will already have been
5033          initialized in the relocate_section function.  */
5034       if (info->shared
5035 	  && (info->symbolic
5036 	      || h->dynindx == -1 || h->forced_local) && h->def_regular)
5037 	{
5038 fprintf(stderr, "*** check this relocation %s\n", __FUNCTION__);
5039 	  rela.r_info = ELF32_R_INFO (0, R_pcrel24);
5040 	  rela.r_addend = bfd_get_signed_32 (output_bfd,
5041 					     (sgot->contents
5042 					      +
5043 					      (h->got.
5044 					       offset & ~(bfd_vma) 1)));
5045 	}
5046       else
5047 	{
5048 	  bfd_put_32 (output_bfd, (bfd_vma) 0,
5049 		      sgot->contents + (h->got.offset & ~(bfd_vma) 1));
5050 	  rela.r_info = ELF32_R_INFO (h->dynindx, R_got);
5051 	  rela.r_addend = 0;
5052 	}
5053 
5054       loc = srela->contents;
5055       loc += srela->reloc_count++ * sizeof (Elf32_External_Rela);
5056       bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
5057     }
5058 
5059   if (h->needs_copy)
5060     {
5061       BFD_ASSERT (0);
5062     }
5063   /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute.  */
5064   if (strcmp (h->root.root.string, "_DYNAMIC") == 0
5065       || h == elf_hash_table (info)->hgot)
5066     sym->st_shndx = SHN_ABS;
5067 
5068   return TRUE;
5069 }
5070 
5071 /* Adjust a symbol defined by a dynamic object and referenced by a
5072    regular object.  The current definition is in some section of the
5073    dynamic object, but we're not including those sections.  We have to
5074    change the definition to something the rest of the link can
5075    understand.  */
5076 
5077 static bfd_boolean
bfin_adjust_dynamic_symbol(struct bfd_link_info * info,struct elf_link_hash_entry * h)5078 bfin_adjust_dynamic_symbol (struct bfd_link_info *info,
5079 				struct elf_link_hash_entry *h)
5080 {
5081   bfd *dynobj;
5082   asection *s;
5083   unsigned int power_of_two;
5084 
5085   dynobj = elf_hash_table (info)->dynobj;
5086 
5087   /* Make sure we know what is going on here.  */
5088   BFD_ASSERT (dynobj != NULL
5089 	      && (h->needs_plt
5090 		  || h->u.weakdef != NULL
5091 		  || (h->def_dynamic && h->ref_regular && !h->def_regular)));
5092 
5093   /* If this is a function, put it in the procedure linkage table.  We
5094      will fill in the contents of the procedure linkage table later,
5095      when we know the address of the .got section.  */
5096   if (h->type == STT_FUNC || h->needs_plt)
5097     {
5098       BFD_ASSERT(0);
5099     }
5100 
5101   /* If this is a weak symbol, and there is a real definition, the
5102      processor independent code will have arranged for us to see the
5103      real definition first, and we can just use the same value.  */
5104   if (h->u.weakdef != NULL)
5105     {
5106       BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
5107 		  || h->u.weakdef->root.type == bfd_link_hash_defweak);
5108       h->root.u.def.section = h->u.weakdef->root.u.def.section;
5109       h->root.u.def.value = h->u.weakdef->root.u.def.value;
5110       return TRUE;
5111     }
5112 
5113   /* This is a reference to a symbol defined by a dynamic object which
5114      is not a function.  */
5115 
5116   /* If we are creating a shared library, we must presume that the
5117      only references to the symbol are via the global offset table.
5118      For such cases we need not do anything here; the relocations will
5119      be handled correctly by relocate_section.  */
5120   if (info->shared)
5121     return TRUE;
5122 
5123   /* We must allocate the symbol in our .dynbss section, which will
5124      become part of the .bss section of the executable.  There will be
5125      an entry for this symbol in the .dynsym section.  The dynamic
5126      object will contain position independent code, so all references
5127      from the dynamic object to this symbol will go through the global
5128      offset table.  The dynamic linker will use the .dynsym entry to
5129      determine the address it must put in the global offset table, so
5130      both the dynamic object and the regular object will refer to the
5131      same memory location for the variable.  */
5132 
5133   s = bfd_get_section_by_name (dynobj, ".dynbss");
5134   BFD_ASSERT (s != NULL);
5135 
5136   /* We must generate a R_68K_COPY reloc to tell the dynamic linker to
5137      copy the initial value out of the dynamic object and into the
5138      runtime process image.  We need to remember the offset into the
5139      .rela.bss section we are going to use.  */
5140   if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
5141     {
5142       asection *srel;
5143 
5144       srel = bfd_get_section_by_name (dynobj, ".rela.bss");
5145       BFD_ASSERT (srel != NULL);
5146       srel->size += sizeof (Elf32_External_Rela);
5147       h->needs_copy = 1;
5148     }
5149 
5150   /* We need to figure out the alignment required for this symbol.  I
5151      have no idea how ELF linkers handle this.  */
5152   power_of_two = bfd_log2 (h->size);
5153   if (power_of_two > 3)
5154     power_of_two = 3;
5155 
5156   /* Apply the required alignment.  */
5157   s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two));
5158   if (power_of_two > bfd_get_section_alignment (dynobj, s))
5159     {
5160       if (!bfd_set_section_alignment (dynobj, s, power_of_two))
5161 	return FALSE;
5162     }
5163 
5164   /* Define the symbol as being at this point in the section.  */
5165   h->root.u.def.section = s;
5166   h->root.u.def.value = s->size;
5167 
5168   /* Increment the section size to make room for the symbol.  */
5169   s->size += h->size;
5170 
5171   return TRUE;
5172 }
5173 
5174 /* The bfin linker needs to keep track of the number of relocs that it
5175    decides to copy in check_relocs for each symbol.  This is so that it
5176    can discard PC relative relocs if it doesn't need them when linking
5177    with -Bsymbolic.  We store the information in a field extending the
5178    regular ELF linker hash table.  */
5179 
5180 /* This structure keeps track of the number of PC relative relocs we have
5181    copied for a given symbol.  */
5182 
5183 struct bfin_pcrel_relocs_copied
5184 {
5185   /* Next section.  */
5186   struct bfin_pcrel_relocs_copied *next;
5187   /* A section in dynobj.  */
5188   asection *section;
5189   /* Number of relocs copied in this section.  */
5190   bfd_size_type count;
5191 };
5192 
5193 /* This function is called via elf_link_hash_traverse if we are
5194    creating a shared object.  In the -Bsymbolic case it discards the
5195    space allocated to copy PC relative relocs against symbols which
5196    are defined in regular objects.  For the normal shared case, it
5197    discards space for pc-relative relocs that have become local due to
5198    symbol visibility changes.  We allocated space for them in the
5199    check_relocs routine, but we won't fill them in in the
5200    relocate_section routine.
5201 
5202    We also check whether any of the remaining relocations apply
5203    against a readonly section, and set the DF_TEXTREL flag in this
5204    case.  */
5205 
5206 static bfd_boolean
bfin_discard_copies(struct elf_link_hash_entry * h,PTR inf)5207 bfin_discard_copies (struct elf_link_hash_entry *h, PTR inf)
5208 {
5209   struct bfd_link_info *info = (struct bfd_link_info *) inf;
5210   struct bfin_pcrel_relocs_copied *s;
5211 
5212   if (h->root.type == bfd_link_hash_warning)
5213     h = (struct elf_link_hash_entry *) h->root.u.i.link;
5214 
5215   if (!h->def_regular || (!info->symbolic && !h->forced_local))
5216     {
5217       if ((info->flags & DF_TEXTREL) == 0)
5218 	{
5219 	  /* Look for relocations against read-only sections.  */
5220 	  for (s = bfin_hash_entry (h)->pcrel_relocs_copied;
5221 	       s != NULL; s = s->next)
5222 	    if ((s->section->flags & SEC_READONLY) != 0)
5223 	      {
5224 		info->flags |= DF_TEXTREL;
5225 		break;
5226 	      }
5227 	}
5228 
5229       return TRUE;
5230     }
5231 
5232   for (s = bfin_hash_entry (h)->pcrel_relocs_copied;
5233        s != NULL; s = s->next)
5234     s->section->size -= s->count * sizeof (Elf32_External_Rela);
5235 
5236   return TRUE;
5237 }
5238 
5239 static bfd_boolean
bfin_size_dynamic_sections(bfd * output_bfd ATTRIBUTE_UNUSED,struct bfd_link_info * info)5240 bfin_size_dynamic_sections (bfd * output_bfd ATTRIBUTE_UNUSED,
5241 				struct bfd_link_info *info)
5242 {
5243   bfd *dynobj;
5244   asection *s;
5245   bfd_boolean relocs;
5246 
5247   dynobj = elf_hash_table (info)->dynobj;
5248   BFD_ASSERT (dynobj != NULL);
5249 
5250   if (elf_hash_table (info)->dynamic_sections_created)
5251     {
5252       /* Set the contents of the .interp section to the interpreter.  */
5253       if (info->executable)
5254 	{
5255 	  s = bfd_get_section_by_name (dynobj, ".interp");
5256 	  BFD_ASSERT (s != NULL);
5257 	  s->size = sizeof ELF_DYNAMIC_INTERPRETER;
5258 	  s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
5259 	}
5260     }
5261   else
5262     {
5263       /* We may have created entries in the .rela.got section.
5264          However, if we are not creating the dynamic sections, we will
5265          not actually use these entries.  Reset the size of .rela.got,
5266          which will cause it to get stripped from the output file
5267          below.  */
5268       s = bfd_get_section_by_name (dynobj, ".rela.got");
5269       if (s != NULL)
5270 	s->size = 0;
5271     }
5272 
5273   /* If this is a -Bsymbolic shared link, then we need to discard all
5274      PC relative relocs against symbols defined in a regular object.
5275      For the normal shared case we discard the PC relative relocs
5276      against symbols that have become local due to visibility changes.
5277      We allocated space for them in the check_relocs routine, but we
5278      will not fill them in in the relocate_section routine.  */
5279   if (info->shared)
5280     elf_link_hash_traverse (elf_hash_table (info),
5281 			    bfin_discard_copies, (PTR) info);
5282 
5283   /* The check_relocs and adjust_dynamic_symbol entry points have
5284      determined the sizes of the various dynamic sections.  Allocate
5285      memory for them.  */
5286   relocs = FALSE;
5287   for (s = dynobj->sections; s != NULL; s = s->next)
5288     {
5289       const char *name;
5290       bfd_boolean strip;
5291 
5292       if ((s->flags & SEC_LINKER_CREATED) == 0)
5293 	continue;
5294 
5295       /* It's OK to base decisions on the section name, because none
5296          of the dynobj section names depend upon the input files.  */
5297       name = bfd_get_section_name (dynobj, s);
5298 
5299       strip = FALSE;
5300 
5301        if (strncmp (name, ".rela", 5) == 0)
5302 	{
5303 	  if (s->size == 0)
5304 	    {
5305 	      /* If we don't need this section, strip it from the
5306 	         output file.  This is mostly to handle .rela.bss and
5307 	         .rela.plt.  We must create both sections in
5308 	         create_dynamic_sections, because they must be created
5309 	         before the linker maps input sections to output
5310 	         sections.  The linker does that before
5311 	         adjust_dynamic_symbol is called, and it is that
5312 	         function which decides whether anything needs to go
5313 	         into these sections.  */
5314 	      strip = TRUE;
5315 	    }
5316 	  else
5317 	    {
5318 	      relocs = TRUE;
5319 
5320 	      /* We use the reloc_count field as a counter if we need
5321 	         to copy relocs into the output file.  */
5322 	      s->reloc_count = 0;
5323 	    }
5324 	}
5325       else if (strncmp (name, ".got", 4) != 0)
5326 	{
5327 	  /* It's not one of our sections, so don't allocate space.  */
5328 	  continue;
5329 	}
5330 
5331       if (strip)
5332 	{
5333 	  s->flags |= SEC_EXCLUDE;
5334 	  continue;
5335 	}
5336 
5337       /* Allocate memory for the section contents.  */
5338       /* FIXME: This should be a call to bfd_alloc not bfd_zalloc.
5339          Unused entries should be reclaimed before the section's contents
5340          are written out, but at the moment this does not happen.  Thus in
5341          order to prevent writing out garbage, we initialise the section's
5342          contents to zero.  */
5343       s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
5344       if (s->contents == NULL && s->size != 0)
5345 	return FALSE;
5346     }
5347 
5348   if (elf_hash_table (info)->dynamic_sections_created)
5349     {
5350       /* Add some entries to the .dynamic section.  We fill in the
5351          values later, in bfin_finish_dynamic_sections, but we
5352          must add the entries now so that we get the correct size for
5353          the .dynamic section.  The DT_DEBUG entry is filled in by the
5354          dynamic linker and used by the debugger.  */
5355 #define add_dynamic_entry(TAG, VAL) \
5356   _bfd_elf_add_dynamic_entry (info, TAG, VAL)
5357 
5358       if (!info->shared)
5359 	{
5360 	  if (!add_dynamic_entry (DT_DEBUG, 0))
5361 	    return FALSE;
5362 	}
5363 
5364 
5365       if (relocs)
5366 	{
5367 	  if (!add_dynamic_entry (DT_RELA, 0)
5368 	      || !add_dynamic_entry (DT_RELASZ, 0)
5369 	      || !add_dynamic_entry (DT_RELAENT,
5370 				     sizeof (Elf32_External_Rela)))
5371 	    return FALSE;
5372 	}
5373 
5374       if ((info->flags & DF_TEXTREL) != 0)
5375 	{
5376 	  if (!add_dynamic_entry (DT_TEXTREL, 0))
5377 	    return FALSE;
5378 	}
5379     }
5380 #undef add_dynamic_entry
5381 
5382   return TRUE;
5383 }
5384 
5385 /* Given a .data section and a .emreloc in-memory section, store
5386    relocation information into the .emreloc section which can be
5387    used at runtime to relocate the section.  This is called by the
5388    linker when the --embedded-relocs switch is used.  This is called
5389    after the add_symbols entry point has been called for all the
5390    objects, and before the final_link entry point is called.  */
5391 
5392 bfd_boolean bfd_bfin_elf32_create_embedded_relocs
5393   PARAMS ((bfd *, struct bfd_link_info *, asection *, asection *, char **));
5394 
5395 bfd_boolean
bfd_bfin_elf32_create_embedded_relocs(bfd * abfd,struct bfd_link_info * info,asection * datasec,asection * relsec,char ** errmsg)5396 bfd_bfin_elf32_create_embedded_relocs (
5397      bfd *abfd,
5398      struct bfd_link_info *info,
5399      asection *datasec,
5400      asection *relsec,
5401      char **errmsg)
5402 {
5403   Elf_Internal_Shdr *symtab_hdr;
5404   Elf_Internal_Sym *isymbuf = NULL;
5405   Elf_Internal_Rela *internal_relocs = NULL;
5406   Elf_Internal_Rela *irel, *irelend;
5407   bfd_byte *p;
5408   bfd_size_type amt;
5409 
5410   BFD_ASSERT (! info->relocatable);
5411 
5412   *errmsg = NULL;
5413 
5414   if (datasec->reloc_count == 0)
5415     return TRUE;
5416 
5417   symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
5418 
5419   /* Get a copy of the native relocations.  */
5420   internal_relocs = (_bfd_elf_link_read_relocs
5421 		     (abfd, datasec, (PTR) NULL, (Elf_Internal_Rela *) NULL,
5422 		      info->keep_memory));
5423   if (internal_relocs == NULL)
5424     goto error_return;
5425 
5426   amt = (bfd_size_type) datasec->reloc_count * 12;
5427   relsec->contents = (bfd_byte *) bfd_alloc (abfd, amt);
5428   if (relsec->contents == NULL)
5429     goto error_return;
5430 
5431   p = relsec->contents;
5432 
5433   irelend = internal_relocs + datasec->reloc_count;
5434   for (irel = internal_relocs; irel < irelend; irel++, p += 12)
5435     {
5436       asection *targetsec;
5437 
5438       /* We are going to write a four byte longword into the runtime
5439        reloc section.  The longword will be the address in the data
5440        section which must be relocated.  It is followed by the name
5441        of the target section NUL-padded or truncated to 8
5442        characters.  */
5443 
5444       /* We can only relocate absolute longword relocs at run time.  */
5445       if (ELF32_R_TYPE (irel->r_info) != (int) R_byte4_data)
5446 	{
5447 	  *errmsg = _("unsupported reloc type");
5448 	  bfd_set_error (bfd_error_bad_value);
5449 	  goto error_return;
5450 	}
5451 
5452       /* Get the target section referred to by the reloc.  */
5453       if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
5454 	{
5455 	  /* A local symbol.  */
5456 	  Elf_Internal_Sym *isym;
5457 
5458 	  /* Read this BFD's local symbols if we haven't done so already.  */
5459 	  if (isymbuf == NULL)
5460 	    {
5461 	      isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
5462 	      if (isymbuf == NULL)
5463 		isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
5464 						symtab_hdr->sh_info, 0,
5465 						NULL, NULL, NULL);
5466 	      if (isymbuf == NULL)
5467 		goto error_return;
5468 	    }
5469 
5470 	  isym = isymbuf + ELF32_R_SYM (irel->r_info);
5471 	  targetsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
5472 	}
5473       else
5474 	{
5475 	  unsigned long indx;
5476 	  struct elf_link_hash_entry *h;
5477 
5478 	  /* An external symbol.  */
5479 	  indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
5480 	  h = elf_sym_hashes (abfd)[indx];
5481 	  BFD_ASSERT (h != NULL);
5482 	  if (h->root.type == bfd_link_hash_defined
5483 	      || h->root.type == bfd_link_hash_defweak)
5484 	    targetsec = h->root.u.def.section;
5485 	  else
5486 	    targetsec = NULL;
5487 	}
5488 
5489       bfd_put_32 (abfd, irel->r_offset + datasec->output_offset, p);
5490       memset (p + 4, 0, 8);
5491       if (targetsec != NULL)
5492 	strncpy ((char *) p + 4, targetsec->output_section->name, 8);
5493     }
5494 
5495   if (isymbuf != NULL && symtab_hdr->contents != (unsigned char *) isymbuf)
5496     free (isymbuf);
5497   if (internal_relocs != NULL
5498       && elf_section_data (datasec)->relocs != internal_relocs)
5499     free (internal_relocs);
5500   return TRUE;
5501 
5502 error_return:
5503   if (isymbuf != NULL && symtab_hdr->contents != (unsigned char *) isymbuf)
5504     free (isymbuf);
5505   if (internal_relocs != NULL
5506       && elf_section_data (datasec)->relocs != internal_relocs)
5507     free (internal_relocs);
5508   return FALSE;
5509 }
5510 
5511 #define TARGET_LITTLE_SYM		bfd_elf32_bfin_vec
5512 #define TARGET_LITTLE_NAME		"elf32-bfin"
5513 #define ELF_ARCH			bfd_arch_bfin
5514 #define ELF_MACHINE_CODE		EM_BLACKFIN
5515 #define ELF_MAXPAGESIZE			0x1000
5516 #define elf_symbol_leading_char		'_'
5517 
5518 #define bfd_elf32_bfd_reloc_type_lookup	bfin_bfd_reloc_type_lookup
5519 #define elf_info_to_howto		bfin_info_to_howto
5520 #define elf_info_to_howto_rel		0
5521 #define elf_backend_object_p		elf32_bfin_object_p
5522 
5523 #define bfd_elf32_bfd_is_local_label_name \
5524                                         bfin_is_local_label_name
5525 #define bfin_hash_table(p) \
5526   ((struct bfin_link_hash_table *) (p)->hash)
5527 
5528 
5529 
5530 #define elf_backend_create_dynamic_sections \
5531                                         _bfd_elf_create_dynamic_sections
5532 #define bfd_elf32_bfd_link_hash_table_create \
5533                                         bfin_link_hash_table_create
5534 #define bfd_elf32_bfd_final_link        bfd_elf_gc_common_final_link
5535 
5536 #define elf_backend_check_relocs        bfin_check_relocs
5537 #define elf_backend_adjust_dynamic_symbol \
5538                                         bfin_adjust_dynamic_symbol
5539 #define elf_backend_size_dynamic_sections \
5540                                         bfin_size_dynamic_sections
5541 #define elf_backend_relocate_section    bfin_relocate_section
5542 #define elf_backend_finish_dynamic_symbol \
5543                                         bfin_finish_dynamic_symbol
5544 #define elf_backend_finish_dynamic_sections \
5545                                         bfin_finish_dynamic_sections
5546 #define elf_backend_gc_mark_hook        bfin_gc_mark_hook
5547 #define elf_backend_gc_sweep_hook       bfin_gc_sweep_hook
5548 #define bfd_elf32_bfd_merge_private_bfd_data \
5549                                         elf32_bfin_merge_private_bfd_data
5550 #define bfd_elf32_bfd_set_private_flags \
5551                                         elf32_bfin_set_private_flags
5552 #define bfd_elf32_bfd_print_private_bfd_data \
5553                                         elf32_bfin_print_private_bfd_data
5554 #define elf_backend_reloc_type_class    elf32_bfin_reloc_type_class
5555 #define elf_backend_can_gc_sections 1
5556 #define elf_backend_can_refcount 1
5557 #define elf_backend_want_got_plt 0
5558 #define elf_backend_plt_readonly 1
5559 #define elf_backend_want_plt_sym 0
5560 #define elf_backend_got_header_size     12
5561 #define elf_backend_rela_normal         1
5562 
5563 #include "elf32-target.h"
5564 
5565 #undef TARGET_LITTLE_SYM
5566 #define TARGET_LITTLE_SYM          bfd_elf32_bfinfdpic_vec
5567 #undef TARGET_LITTLE_NAME
5568 #define TARGET_LITTLE_NAME		"elf32-bfinfdpic"
5569 #undef	elf32_bed
5570 #define	elf32_bed		elf32_bfinfdpic_bed
5571 
5572 #undef elf_backend_gc_sweep_hook
5573 #define elf_backend_gc_sweep_hook       bfinfdpic_gc_sweep_hook
5574 
5575 #undef elf_backend_got_header_size
5576 #define elf_backend_got_header_size     0
5577 
5578 #undef elf_backend_relocate_section
5579 #define elf_backend_relocate_section    bfinfdpic_relocate_section
5580 #undef elf_backend_check_relocs
5581 #define elf_backend_check_relocs        bfinfdpic_check_relocs
5582 
5583 #undef bfd_elf32_bfd_link_hash_table_create
5584 #define bfd_elf32_bfd_link_hash_table_create \
5585 		bfinfdpic_elf_link_hash_table_create
5586 #undef elf_backend_always_size_sections
5587 #define elf_backend_always_size_sections \
5588 		elf32_bfinfdpic_always_size_sections
5589 #undef elf_backend_modify_segment_map
5590 #define elf_backend_modify_segment_map \
5591 		elf32_bfinfdpic_modify_segment_map
5592 #undef bfd_elf32_bfd_copy_private_bfd_data
5593 #define bfd_elf32_bfd_copy_private_bfd_data \
5594 		elf32_bfinfdpic_copy_private_bfd_data
5595 
5596 #undef elf_backend_create_dynamic_sections
5597 #define elf_backend_create_dynamic_sections \
5598 		elf32_bfinfdpic_create_dynamic_sections
5599 #undef elf_backend_adjust_dynamic_symbol
5600 #define elf_backend_adjust_dynamic_symbol \
5601 		elf32_bfinfdpic_adjust_dynamic_symbol
5602 #undef elf_backend_size_dynamic_sections
5603 #define elf_backend_size_dynamic_sections \
5604 		elf32_bfinfdpic_size_dynamic_sections
5605 #undef elf_backend_finish_dynamic_symbol
5606 #define elf_backend_finish_dynamic_symbol \
5607 		elf32_bfinfdpic_finish_dynamic_symbol
5608 #undef elf_backend_finish_dynamic_sections
5609 #define elf_backend_finish_dynamic_sections \
5610 		elf32_bfinfdpic_finish_dynamic_sections
5611 
5612 #undef elf_backend_can_make_relative_eh_frame
5613 #define elf_backend_can_make_relative_eh_frame \
5614 		bfinfdpic_elf_use_relative_eh_frame
5615 #undef elf_backend_can_make_lsda_relative_eh_frame
5616 #define elf_backend_can_make_lsda_relative_eh_frame \
5617 		bfinfdpic_elf_use_relative_eh_frame
5618 #undef elf_backend_encode_eh_address
5619 #define elf_backend_encode_eh_address \
5620 		bfinfdpic_elf_encode_eh_address
5621 
5622 #undef elf_backend_may_use_rel_p
5623 #define elf_backend_may_use_rel_p       1
5624 #undef elf_backend_may_use_rela_p
5625 #define elf_backend_may_use_rela_p      1
5626 /* We use REL for dynamic relocations only.  */
5627 #undef elf_backend_default_use_rela_p
5628 #define elf_backend_default_use_rela_p  1
5629 
5630 #undef elf_backend_omit_section_dynsym
5631 #define elf_backend_omit_section_dynsym _bfinfdpic_link_omit_section_dynsym
5632 
5633 #include "elf32-target.h"
5634