1 /* Alpha specific support for 64-bit ELF
2    Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004
3    Free Software Foundation, Inc.
4    Contributed by Richard Henderson <rth@tamu.edu>.
5 
6    This file is part of BFD, the Binary File Descriptor library.
7 
8    This program is free software; you can redistribute it and/or modify
9    it under the terms of the GNU General Public License as published by
10    the Free Software Foundation; either version 2 of the License, or
11    (at your option) any later version.
12 
13    This program is distributed in the hope that it will be useful,
14    but WITHOUT ANY WARRANTY; without even the implied warranty of
15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16    GNU General Public License for more details.
17 
18    You should have received a copy of the GNU General Public License
19    along with this program; if not, write to the Free Software
20    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
21 
22 /* We need a published ABI spec for this.  Until one comes out, don't
23    assume this'll remain unchanged forever.  */
24 
25 #include "bfd.h"
26 #include "sysdep.h"
27 #include "libbfd.h"
28 #include "elf-bfd.h"
29 
30 #include "elf/alpha.h"
31 
32 #define ALPHAECOFF
33 
34 #define NO_COFF_RELOCS
35 #define NO_COFF_SYMBOLS
36 #define NO_COFF_LINENOS
37 
38 /* Get the ECOFF swapping routines.  Needed for the debug information.  */
39 #include "coff/internal.h"
40 #include "coff/sym.h"
41 #include "coff/symconst.h"
42 #include "coff/ecoff.h"
43 #include "coff/alpha.h"
44 #include "aout/ar.h"
45 #include "libcoff.h"
46 #include "libecoff.h"
47 #define ECOFF_64
48 #include "ecoffswap.h"
49 
50 static bfd_boolean alpha_elf_dynamic_symbol_p
51   PARAMS ((struct elf_link_hash_entry *, struct bfd_link_info *));
52 static struct bfd_hash_entry * elf64_alpha_link_hash_newfunc
53   PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
54 static struct bfd_link_hash_table * elf64_alpha_bfd_link_hash_table_create
55   PARAMS ((bfd *));
56 
57 static bfd_reloc_status_type elf64_alpha_reloc_nil
58   PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
59 static bfd_reloc_status_type elf64_alpha_reloc_bad
60   PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
61 static bfd_reloc_status_type elf64_alpha_do_reloc_gpdisp
62   PARAMS ((bfd *, bfd_vma, bfd_byte *, bfd_byte *));
63 static bfd_reloc_status_type elf64_alpha_reloc_gpdisp
64   PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
65 
66 static reloc_howto_type * elf64_alpha_bfd_reloc_type_lookup
67   PARAMS ((bfd *, bfd_reloc_code_real_type));
68 static void elf64_alpha_info_to_howto
69   PARAMS ((bfd *, arelent *, Elf_Internal_Rela *));
70 
71 static bfd_boolean elf64_alpha_mkobject
72   PARAMS ((bfd *));
73 static bfd_boolean elf64_alpha_object_p
74   PARAMS ((bfd *));
75 static bfd_boolean elf64_alpha_section_from_shdr
76   PARAMS ((bfd *, Elf_Internal_Shdr *, const char *));
77 static bfd_boolean elf64_alpha_section_flags
78   PARAMS ((flagword *, Elf_Internal_Shdr *));
79 static bfd_boolean elf64_alpha_fake_sections
80   PARAMS ((bfd *, Elf_Internal_Shdr *, asection *));
81 static bfd_boolean elf64_alpha_create_got_section
82   PARAMS ((bfd *, struct bfd_link_info *));
83 static bfd_boolean elf64_alpha_create_dynamic_sections
84   PARAMS ((bfd *, struct bfd_link_info *));
85 
86 static bfd_boolean elf64_alpha_read_ecoff_info
87   PARAMS ((bfd *, asection *, struct ecoff_debug_info *));
88 static bfd_boolean elf64_alpha_is_local_label_name
89   PARAMS ((bfd *, const char *));
90 static bfd_boolean elf64_alpha_find_nearest_line
91   PARAMS ((bfd *, asection *, asymbol **, bfd_vma, const char **,
92 	   const char **, unsigned int *));
93 
94 #if defined(__STDC__) || defined(ALMOST_STDC)
95 struct alpha_elf_link_hash_entry;
96 #endif
97 
98 static bfd_boolean elf64_alpha_output_extsym
99   PARAMS ((struct alpha_elf_link_hash_entry *, PTR));
100 
101 static bfd_boolean elf64_alpha_can_merge_gots
102   PARAMS ((bfd *, bfd *));
103 static void elf64_alpha_merge_gots
104   PARAMS ((bfd *, bfd *));
105 static bfd_boolean elf64_alpha_calc_got_offsets_for_symbol
106   PARAMS ((struct alpha_elf_link_hash_entry *, PTR));
107 static void elf64_alpha_calc_got_offsets
108   PARAMS ((struct bfd_link_info *));
109 static bfd_boolean elf64_alpha_size_got_sections
110   PARAMS ((struct bfd_link_info *));
111 static bfd_boolean elf64_alpha_size_plt_section
112   PARAMS ((struct bfd_link_info *));
113 static bfd_boolean elf64_alpha_size_plt_section_1
114   PARAMS ((struct alpha_elf_link_hash_entry *, PTR));
115 static bfd_boolean elf64_alpha_always_size_sections
116   PARAMS ((bfd *, struct bfd_link_info *));
117 static int alpha_dynamic_entries_for_reloc
118   PARAMS ((int, int, int));
119 static bfd_boolean elf64_alpha_calc_dynrel_sizes
120   PARAMS ((struct alpha_elf_link_hash_entry *, struct bfd_link_info *));
121 static bfd_boolean elf64_alpha_size_rela_got_section
122   PARAMS ((struct bfd_link_info *));
123 static bfd_boolean elf64_alpha_size_rela_got_1
124   PARAMS ((struct alpha_elf_link_hash_entry *, struct bfd_link_info *));
125 static bfd_boolean elf64_alpha_add_symbol_hook
126   PARAMS ((bfd *, struct bfd_link_info *, Elf_Internal_Sym *,
127 	   const char **, flagword *, asection **, bfd_vma *));
128 static struct alpha_elf_got_entry *get_got_entry
129   PARAMS ((bfd *, struct alpha_elf_link_hash_entry *, unsigned long,
130 	   unsigned long, bfd_vma));
131 static bfd_boolean elf64_alpha_check_relocs
132   PARAMS ((bfd *, struct bfd_link_info *, asection *sec,
133 	  const Elf_Internal_Rela *));
134 static bfd_boolean elf64_alpha_adjust_dynamic_symbol
135   PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
136 static bfd_boolean elf64_alpha_size_dynamic_sections
137   PARAMS ((bfd *, struct bfd_link_info *));
138 static void elf64_alpha_emit_dynrel
139   PARAMS ((bfd *, struct bfd_link_info *, asection *, asection *,
140 	   bfd_vma, long, long, bfd_vma));
141 static bfd_boolean elf64_alpha_relocate_section_r
142   PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
143 	   Elf_Internal_Rela *, Elf_Internal_Sym *, asection **));
144 static bfd_boolean elf64_alpha_relocate_section
145   PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
146 	  Elf_Internal_Rela *, Elf_Internal_Sym *, asection **));
147 static bfd_boolean elf64_alpha_finish_dynamic_symbol
148   PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *,
149 	   Elf_Internal_Sym *));
150 static bfd_boolean elf64_alpha_finish_dynamic_sections
151   PARAMS ((bfd *, struct bfd_link_info *));
152 static bfd_boolean elf64_alpha_final_link
153   PARAMS ((bfd *, struct bfd_link_info *));
154 static bfd_boolean elf64_alpha_merge_ind_symbols
155   PARAMS ((struct alpha_elf_link_hash_entry *, PTR));
156 static Elf_Internal_Rela * elf64_alpha_find_reloc_at_ofs
157   PARAMS ((Elf_Internal_Rela *, Elf_Internal_Rela *, bfd_vma, int));
158 static enum elf_reloc_type_class elf64_alpha_reloc_type_class
159   PARAMS ((const Elf_Internal_Rela *));
160 
161 struct alpha_elf_link_hash_entry
162 {
163   struct elf_link_hash_entry root;
164 
165   /* External symbol information.  */
166   EXTR esym;
167 
168   /* Cumulative flags for all the .got entries.  */
169   int flags;
170 
171   /* Contexts in which a literal was referenced.  */
172 #define ALPHA_ELF_LINK_HASH_LU_ADDR	0x01
173 #define ALPHA_ELF_LINK_HASH_LU_MEM	0x02
174 #define ALPHA_ELF_LINK_HASH_LU_BYTE	0x04
175 #define ALPHA_ELF_LINK_HASH_LU_JSR	0x08
176 #define ALPHA_ELF_LINK_HASH_LU_TLSGD	0x10
177 #define ALPHA_ELF_LINK_HASH_LU_TLSLDM	0x20
178 #define ALPHA_ELF_LINK_HASH_LU_FUNC	0x38
179 #define ALPHA_ELF_LINK_HASH_TLS_IE	0x40
180 #define ALPHA_ELF_LINK_HASH_PLT_LOC	0x80
181 
182   /* Used to undo the localization of a plt symbol.  */
183   asection *plt_old_section;
184   bfd_vma plt_old_value;
185 
186   /* Used to implement multiple .got subsections.  */
187   struct alpha_elf_got_entry
188   {
189     struct alpha_elf_got_entry *next;
190 
191     /* Which .got subsection?  */
192     bfd *gotobj;
193 
194     /* The addend in effect for this entry.  */
195     bfd_vma addend;
196 
197     /* The .got offset for this entry.  */
198     int got_offset;
199 
200     /* How many references to this entry?  */
201     int use_count;
202 
203     /* The relocation type of this entry.  */
204     unsigned char reloc_type;
205 
206     /* How a LITERAL is used.  */
207     unsigned char flags;
208 
209     /* Have we initialized the dynamic relocation for this entry?  */
210     unsigned char reloc_done;
211 
212     /* Have we adjusted this entry for SEC_MERGE?  */
213     unsigned char reloc_xlated;
214   } *got_entries;
215 
216   /* Used to count non-got, non-plt relocations for delayed sizing
217      of relocation sections.  */
218   struct alpha_elf_reloc_entry
219   {
220     struct alpha_elf_reloc_entry *next;
221 
222     /* Which .reloc section? */
223     asection *srel;
224 
225     /* What kind of relocation? */
226     unsigned int rtype;
227 
228     /* Is this against read-only section? */
229     unsigned int reltext : 1;
230 
231     /* How many did we find?  */
232     unsigned long count;
233   } *reloc_entries;
234 };
235 
236 /* Alpha ELF linker hash table.  */
237 
238 struct alpha_elf_link_hash_table
239 {
240   struct elf_link_hash_table root;
241 
242   /* The head of a list of .got subsections linked through
243      alpha_elf_tdata(abfd)->got_link_next.  */
244   bfd *got_list;
245 };
246 
247 /* Look up an entry in a Alpha ELF linker hash table.  */
248 
249 #define alpha_elf_link_hash_lookup(table, string, create, copy, follow)	\
250   ((struct alpha_elf_link_hash_entry *)					\
251    elf_link_hash_lookup (&(table)->root, (string), (create),		\
252 			 (copy), (follow)))
253 
254 /* Traverse a Alpha ELF linker hash table.  */
255 
256 #define alpha_elf_link_hash_traverse(table, func, info)			\
257   (elf_link_hash_traverse						\
258    (&(table)->root,							\
259     (bfd_boolean (*) PARAMS ((struct elf_link_hash_entry *, PTR))) (func), \
260     (info)))
261 
262 /* Get the Alpha ELF linker hash table from a link_info structure.  */
263 
264 #define alpha_elf_hash_table(p) \
265   ((struct alpha_elf_link_hash_table *) ((p)->hash))
266 
267 /* Get the object's symbols as our own entry type.  */
268 
269 #define alpha_elf_sym_hashes(abfd) \
270   ((struct alpha_elf_link_hash_entry **)elf_sym_hashes(abfd))
271 
272 /* Should we do dynamic things to this symbol?  This differs from the
273    generic version in that we never need to consider function pointer
274    equality wrt PLT entries -- we don't create a PLT entry if a symbol's
275    address is ever taken.  */
276 
277 static inline bfd_boolean
alpha_elf_dynamic_symbol_p(h,info)278 alpha_elf_dynamic_symbol_p (h, info)
279      struct elf_link_hash_entry *h;
280      struct bfd_link_info *info;
281 {
282   return _bfd_elf_dynamic_symbol_p (h, info, 0);
283 }
284 
285 /* Create an entry in a Alpha ELF linker hash table.  */
286 
287 static struct bfd_hash_entry *
elf64_alpha_link_hash_newfunc(entry,table,string)288 elf64_alpha_link_hash_newfunc (entry, table, string)
289      struct bfd_hash_entry *entry;
290      struct bfd_hash_table *table;
291      const char *string;
292 {
293   struct alpha_elf_link_hash_entry *ret =
294     (struct alpha_elf_link_hash_entry *) entry;
295 
296   /* Allocate the structure if it has not already been allocated by a
297      subclass.  */
298   if (ret == (struct alpha_elf_link_hash_entry *) NULL)
299     ret = ((struct alpha_elf_link_hash_entry *)
300 	   bfd_hash_allocate (table,
301 			      sizeof (struct alpha_elf_link_hash_entry)));
302   if (ret == (struct alpha_elf_link_hash_entry *) NULL)
303     return (struct bfd_hash_entry *) ret;
304 
305   /* Call the allocation method of the superclass.  */
306   ret = ((struct alpha_elf_link_hash_entry *)
307 	 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
308 				     table, string));
309   if (ret != (struct alpha_elf_link_hash_entry *) NULL)
310     {
311       /* Set local fields.  */
312       memset (&ret->esym, 0, sizeof (EXTR));
313       /* We use -2 as a marker to indicate that the information has
314 	 not been set.  -1 means there is no associated ifd.  */
315       ret->esym.ifd = -2;
316       ret->flags = 0;
317       ret->got_entries = NULL;
318       ret->reloc_entries = NULL;
319     }
320 
321   return (struct bfd_hash_entry *) ret;
322 }
323 
324 /* Create a Alpha ELF linker hash table.  */
325 
326 static struct bfd_link_hash_table *
elf64_alpha_bfd_link_hash_table_create(abfd)327 elf64_alpha_bfd_link_hash_table_create (abfd)
328      bfd *abfd;
329 {
330   struct alpha_elf_link_hash_table *ret;
331   bfd_size_type amt = sizeof (struct alpha_elf_link_hash_table);
332 
333   ret = (struct alpha_elf_link_hash_table *) bfd_zmalloc (amt);
334   if (ret == (struct alpha_elf_link_hash_table *) NULL)
335     return NULL;
336 
337   if (! _bfd_elf_link_hash_table_init (&ret->root, abfd,
338 				       elf64_alpha_link_hash_newfunc))
339     {
340       free (ret);
341       return NULL;
342     }
343 
344   return &ret->root.root;
345 }
346 
347 /* We have some private fields hanging off of the elf_tdata structure.  */
348 
349 struct alpha_elf_obj_tdata
350 {
351   struct elf_obj_tdata root;
352 
353   /* For every input file, these are the got entries for that object's
354      local symbols.  */
355   struct alpha_elf_got_entry ** local_got_entries;
356 
357   /* For every input file, this is the object that owns the got that
358      this input file uses.  */
359   bfd *gotobj;
360 
361   /* For every got, this is a linked list through the objects using this got */
362   bfd *in_got_link_next;
363 
364   /* For every got, this is a link to the next got subsegment.  */
365   bfd *got_link_next;
366 
367   /* For every got, this is the section.  */
368   asection *got;
369 
370   /* For every got, this is it's total number of words.  */
371   int total_got_size;
372 
373   /* For every got, this is the sum of the number of words required
374      to hold all of the member object's local got.  */
375   int local_got_size;
376 };
377 
378 #define alpha_elf_tdata(abfd) \
379   ((struct alpha_elf_obj_tdata *) (abfd)->tdata.any)
380 
381 static bfd_boolean
elf64_alpha_mkobject(abfd)382 elf64_alpha_mkobject (abfd)
383      bfd *abfd;
384 {
385   bfd_size_type amt = sizeof (struct alpha_elf_obj_tdata);
386   abfd->tdata.any = bfd_zalloc (abfd, amt);
387   if (abfd->tdata.any == NULL)
388     return FALSE;
389   return TRUE;
390 }
391 
392 static bfd_boolean
elf64_alpha_object_p(abfd)393 elf64_alpha_object_p (abfd)
394      bfd *abfd;
395 {
396   /* Set the right machine number for an Alpha ELF file.  */
397   return bfd_default_set_arch_mach (abfd, bfd_arch_alpha, 0);
398 }
399 
400 /* In case we're on a 32-bit machine, construct a 64-bit "-1" value
401    from smaller values.  Start with zero, widen, *then* decrement.  */
402 #define MINUS_ONE	(((bfd_vma)0) - 1)
403 
404 #define SKIP_HOWTO(N) \
405   HOWTO(N, 0, 0, 0, 0, 0, 0, elf64_alpha_reloc_bad, 0, 0, 0, 0, 0)
406 
407 static reloc_howto_type elf64_alpha_howto_table[] =
408 {
409   HOWTO (R_ALPHA_NONE,		/* type */
410 	 0,			/* rightshift */
411 	 0,			/* size (0 = byte, 1 = short, 2 = long) */
412 	 8,			/* bitsize */
413 	 TRUE,			/* pc_relative */
414 	 0,			/* bitpos */
415 	 complain_overflow_dont, /* complain_on_overflow */
416 	 elf64_alpha_reloc_nil,	/* special_function */
417 	 "NONE",		/* name */
418 	 FALSE,			/* partial_inplace */
419 	 0,			/* src_mask */
420 	 0,			/* dst_mask */
421 	 TRUE),			/* pcrel_offset */
422 
423   /* A 32 bit reference to a symbol.  */
424   HOWTO (R_ALPHA_REFLONG,	/* 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 	 0,			/* special_function */
432 	 "REFLONG",		/* name */
433 	 FALSE,			/* partial_inplace */
434 	 0xffffffff,		/* src_mask */
435 	 0xffffffff,		/* dst_mask */
436 	 FALSE),		/* pcrel_offset */
437 
438   /* A 64 bit reference to a symbol.  */
439   HOWTO (R_ALPHA_REFQUAD,	/* type */
440 	 0,			/* rightshift */
441 	 4,			/* size (0 = byte, 1 = short, 2 = long) */
442 	 64,			/* bitsize */
443 	 FALSE,			/* pc_relative */
444 	 0,			/* bitpos */
445 	 complain_overflow_bitfield, /* complain_on_overflow */
446 	 0,			/* special_function */
447 	 "REFQUAD",		/* name */
448 	 FALSE,			/* partial_inplace */
449 	 MINUS_ONE,		/* src_mask */
450 	 MINUS_ONE,		/* dst_mask */
451 	 FALSE),		/* pcrel_offset */
452 
453   /* A 32 bit GP relative offset.  This is just like REFLONG except
454      that when the value is used the value of the gp register will be
455      added in.  */
456   HOWTO (R_ALPHA_GPREL32,	/* type */
457 	 0,			/* rightshift */
458 	 2,			/* size (0 = byte, 1 = short, 2 = long) */
459 	 32,			/* bitsize */
460 	 FALSE,			/* pc_relative */
461 	 0,			/* bitpos */
462 	 complain_overflow_bitfield, /* complain_on_overflow */
463 	 0,			/* special_function */
464 	 "GPREL32",		/* name */
465 	 FALSE,			/* partial_inplace */
466 	 0xffffffff,		/* src_mask */
467 	 0xffffffff,		/* dst_mask */
468 	 FALSE),		/* pcrel_offset */
469 
470   /* Used for an instruction that refers to memory off the GP register.  */
471   HOWTO (R_ALPHA_LITERAL,	/* type */
472 	 0,			/* rightshift */
473 	 1,			/* size (0 = byte, 1 = short, 2 = long) */
474 	 16,			/* bitsize */
475 	 FALSE,			/* pc_relative */
476 	 0,			/* bitpos */
477 	 complain_overflow_signed, /* complain_on_overflow */
478 	 0,			/* special_function */
479 	 "ELF_LITERAL",		/* name */
480 	 FALSE,			/* partial_inplace */
481 	 0xffff,		/* src_mask */
482 	 0xffff,		/* dst_mask */
483 	 FALSE),		/* pcrel_offset */
484 
485   /* This reloc only appears immediately following an ELF_LITERAL reloc.
486      It identifies a use of the literal.  The symbol index is special:
487      1 means the literal address is in the base register of a memory
488      format instruction; 2 means the literal address is in the byte
489      offset register of a byte-manipulation instruction; 3 means the
490      literal address is in the target register of a jsr instruction.
491      This does not actually do any relocation.  */
492   HOWTO (R_ALPHA_LITUSE,	/* type */
493 	 0,			/* rightshift */
494 	 1,			/* size (0 = byte, 1 = short, 2 = long) */
495 	 32,			/* bitsize */
496 	 FALSE,			/* pc_relative */
497 	 0,			/* bitpos */
498 	 complain_overflow_dont, /* complain_on_overflow */
499 	 elf64_alpha_reloc_nil,	/* special_function */
500 	 "LITUSE",		/* name */
501 	 FALSE,			/* partial_inplace */
502 	 0,			/* src_mask */
503 	 0,			/* dst_mask */
504 	 FALSE),		/* pcrel_offset */
505 
506   /* Load the gp register.  This is always used for a ldah instruction
507      which loads the upper 16 bits of the gp register.  The symbol
508      index of the GPDISP instruction is an offset in bytes to the lda
509      instruction that loads the lower 16 bits.  The value to use for
510      the relocation is the difference between the GP value and the
511      current location; the load will always be done against a register
512      holding the current address.
513 
514      NOTE: Unlike ECOFF, partial in-place relocation is not done.  If
515      any offset is present in the instructions, it is an offset from
516      the register to the ldah instruction.  This lets us avoid any
517      stupid hackery like inventing a gp value to do partial relocation
518      against.  Also unlike ECOFF, we do the whole relocation off of
519      the GPDISP rather than a GPDISP_HI16/GPDISP_LO16 pair.  An odd,
520      space consuming bit, that, since all the information was present
521      in the GPDISP_HI16 reloc.  */
522   HOWTO (R_ALPHA_GPDISP,	/* type */
523 	 16,			/* rightshift */
524 	 2,			/* size (0 = byte, 1 = short, 2 = long) */
525 	 16,			/* bitsize */
526 	 FALSE,			/* pc_relative */
527 	 0,			/* bitpos */
528 	 complain_overflow_dont, /* complain_on_overflow */
529 	 elf64_alpha_reloc_gpdisp, /* special_function */
530 	 "GPDISP",		/* name */
531 	 FALSE,			/* partial_inplace */
532 	 0xffff,		/* src_mask */
533 	 0xffff,		/* dst_mask */
534 	 TRUE),			/* pcrel_offset */
535 
536   /* A 21 bit branch.  */
537   HOWTO (R_ALPHA_BRADDR,	/* type */
538 	 2,			/* rightshift */
539 	 2,			/* size (0 = byte, 1 = short, 2 = long) */
540 	 21,			/* bitsize */
541 	 TRUE,			/* pc_relative */
542 	 0,			/* bitpos */
543 	 complain_overflow_signed, /* complain_on_overflow */
544 	 0,			/* special_function */
545 	 "BRADDR",		/* name */
546 	 FALSE,			/* partial_inplace */
547 	 0x1fffff,		/* src_mask */
548 	 0x1fffff,		/* dst_mask */
549 	 TRUE),			/* pcrel_offset */
550 
551   /* A hint for a jump to a register.  */
552   HOWTO (R_ALPHA_HINT,		/* type */
553 	 2,			/* rightshift */
554 	 1,			/* size (0 = byte, 1 = short, 2 = long) */
555 	 14,			/* bitsize */
556 	 TRUE,			/* pc_relative */
557 	 0,			/* bitpos */
558 	 complain_overflow_dont, /* complain_on_overflow */
559 	 0,			/* special_function */
560 	 "HINT",		/* name */
561 	 FALSE,			/* partial_inplace */
562 	 0x3fff,		/* src_mask */
563 	 0x3fff,		/* dst_mask */
564 	 TRUE),			/* pcrel_offset */
565 
566   /* 16 bit PC relative offset.  */
567   HOWTO (R_ALPHA_SREL16,	/* type */
568 	 0,			/* rightshift */
569 	 1,			/* size (0 = byte, 1 = short, 2 = long) */
570 	 16,			/* bitsize */
571 	 TRUE,			/* pc_relative */
572 	 0,			/* bitpos */
573 	 complain_overflow_signed, /* complain_on_overflow */
574 	 0,			/* special_function */
575 	 "SREL16",		/* name */
576 	 FALSE,			/* partial_inplace */
577 	 0xffff,		/* src_mask */
578 	 0xffff,		/* dst_mask */
579 	 TRUE),			/* pcrel_offset */
580 
581   /* 32 bit PC relative offset.  */
582   HOWTO (R_ALPHA_SREL32,	/* type */
583 	 0,			/* rightshift */
584 	 2,			/* size (0 = byte, 1 = short, 2 = long) */
585 	 32,			/* bitsize */
586 	 TRUE,			/* pc_relative */
587 	 0,			/* bitpos */
588 	 complain_overflow_signed, /* complain_on_overflow */
589 	 0,			/* special_function */
590 	 "SREL32",		/* name */
591 	 FALSE,			/* partial_inplace */
592 	 0xffffffff,		/* src_mask */
593 	 0xffffffff,		/* dst_mask */
594 	 TRUE),			/* pcrel_offset */
595 
596   /* A 64 bit PC relative offset.  */
597   HOWTO (R_ALPHA_SREL64,	/* type */
598 	 0,			/* rightshift */
599 	 4,			/* size (0 = byte, 1 = short, 2 = long) */
600 	 64,			/* bitsize */
601 	 TRUE,			/* pc_relative */
602 	 0,			/* bitpos */
603 	 complain_overflow_signed, /* complain_on_overflow */
604 	 0,			/* special_function */
605 	 "SREL64",		/* name */
606 	 FALSE,			/* partial_inplace */
607 	 MINUS_ONE,		/* src_mask */
608 	 MINUS_ONE,		/* dst_mask */
609 	 TRUE),			/* pcrel_offset */
610 
611   /* Skip 12 - 16; deprecated ECOFF relocs.  */
612   SKIP_HOWTO (12),
613   SKIP_HOWTO (13),
614   SKIP_HOWTO (14),
615   SKIP_HOWTO (15),
616   SKIP_HOWTO (16),
617 
618   /* The high 16 bits of the displacement from GP to the target.  */
619   HOWTO (R_ALPHA_GPRELHIGH,
620 	 0,			/* rightshift */
621 	 1,			/* size (0 = byte, 1 = short, 2 = long) */
622 	 16,			/* bitsize */
623 	 FALSE,			/* pc_relative */
624 	 0,			/* bitpos */
625 	 complain_overflow_signed, /* complain_on_overflow */
626 	 0,			/* special_function */
627 	 "GPRELHIGH",		/* name */
628 	 FALSE,			/* partial_inplace */
629 	 0xffff,		/* src_mask */
630 	 0xffff,		/* dst_mask */
631 	 FALSE),		/* pcrel_offset */
632 
633   /* The low 16 bits of the displacement from GP to the target.  */
634   HOWTO (R_ALPHA_GPRELLOW,
635 	 0,			/* rightshift */
636 	 1,			/* size (0 = byte, 1 = short, 2 = long) */
637 	 16,			/* bitsize */
638 	 FALSE,			/* pc_relative */
639 	 0,			/* bitpos */
640 	 complain_overflow_dont, /* complain_on_overflow */
641 	 0,			/* special_function */
642 	 "GPRELLOW",		/* name */
643 	 FALSE,			/* partial_inplace */
644 	 0xffff,		/* src_mask */
645 	 0xffff,		/* dst_mask */
646 	 FALSE),		/* pcrel_offset */
647 
648   /* A 16-bit displacement from the GP to the target.  */
649   HOWTO (R_ALPHA_GPREL16,
650 	 0,			/* rightshift */
651 	 1,			/* size (0 = byte, 1 = short, 2 = long) */
652 	 16,			/* bitsize */
653 	 FALSE,			/* pc_relative */
654 	 0,			/* bitpos */
655 	 complain_overflow_signed, /* complain_on_overflow */
656 	 0,			/* special_function */
657 	 "GPREL16",		/* name */
658 	 FALSE,			/* partial_inplace */
659 	 0xffff,		/* src_mask */
660 	 0xffff,		/* dst_mask */
661 	 FALSE),		/* pcrel_offset */
662 
663   /* Skip 20 - 23; deprecated ECOFF relocs.  */
664   SKIP_HOWTO (20),
665   SKIP_HOWTO (21),
666   SKIP_HOWTO (22),
667   SKIP_HOWTO (23),
668 
669   /* Misc ELF relocations.  */
670 
671   /* A dynamic relocation to copy the target into our .dynbss section.  */
672   /* Not generated, as all Alpha objects use PIC, so it is not needed.  It
673      is present because every other ELF has one, but should not be used
674      because .dynbss is an ugly thing.  */
675   HOWTO (R_ALPHA_COPY,
676 	 0,
677 	 0,
678 	 0,
679 	 FALSE,
680 	 0,
681 	 complain_overflow_dont,
682 	 bfd_elf_generic_reloc,
683 	 "COPY",
684 	 FALSE,
685 	 0,
686 	 0,
687 	 TRUE),
688 
689   /* A dynamic relocation for a .got entry.  */
690   HOWTO (R_ALPHA_GLOB_DAT,
691 	 0,
692 	 0,
693 	 0,
694 	 FALSE,
695 	 0,
696 	 complain_overflow_dont,
697 	 bfd_elf_generic_reloc,
698 	 "GLOB_DAT",
699 	 FALSE,
700 	 0,
701 	 0,
702 	 TRUE),
703 
704   /* A dynamic relocation for a .plt entry.  */
705   HOWTO (R_ALPHA_JMP_SLOT,
706 	 0,
707 	 0,
708 	 0,
709 	 FALSE,
710 	 0,
711 	 complain_overflow_dont,
712 	 bfd_elf_generic_reloc,
713 	 "JMP_SLOT",
714 	 FALSE,
715 	 0,
716 	 0,
717 	 TRUE),
718 
719   /* A dynamic relocation to add the base of the DSO to a 64-bit field.  */
720   HOWTO (R_ALPHA_RELATIVE,
721 	 0,
722 	 0,
723 	 0,
724 	 FALSE,
725 	 0,
726 	 complain_overflow_dont,
727 	 bfd_elf_generic_reloc,
728 	 "RELATIVE",
729 	 FALSE,
730 	 0,
731 	 0,
732 	 TRUE),
733 
734   /* A 21 bit branch that adjusts for gp loads.  */
735   HOWTO (R_ALPHA_BRSGP,		/* type */
736 	 2,			/* rightshift */
737 	 2,			/* size (0 = byte, 1 = short, 2 = long) */
738 	 21,			/* bitsize */
739 	 TRUE,			/* pc_relative */
740 	 0,			/* bitpos */
741 	 complain_overflow_signed, /* complain_on_overflow */
742 	 0,			/* special_function */
743 	 "BRSGP",		/* name */
744 	 FALSE,			/* partial_inplace */
745 	 0x1fffff,		/* src_mask */
746 	 0x1fffff,		/* dst_mask */
747 	 TRUE),			/* pcrel_offset */
748 
749   /* Creates a tls_index for the symbol in the got.  */
750   HOWTO (R_ALPHA_TLSGD,		/* type */
751 	 0,			/* rightshift */
752 	 1,			/* size (0 = byte, 1 = short, 2 = long) */
753 	 16,			/* bitsize */
754 	 FALSE,			/* pc_relative */
755 	 0,			/* bitpos */
756 	 complain_overflow_signed, /* complain_on_overflow */
757 	 0,			/* special_function */
758 	 "TLSGD",		/* name */
759 	 FALSE,			/* partial_inplace */
760 	 0xffff,		/* src_mask */
761 	 0xffff,		/* dst_mask */
762 	 FALSE),		/* pcrel_offset */
763 
764   /* Creates a tls_index for the (current) module in the got.  */
765   HOWTO (R_ALPHA_TLSLDM,	/* type */
766 	 0,			/* rightshift */
767 	 1,			/* size (0 = byte, 1 = short, 2 = long) */
768 	 16,			/* bitsize */
769 	 FALSE,			/* pc_relative */
770 	 0,			/* bitpos */
771 	 complain_overflow_signed, /* complain_on_overflow */
772 	 0,			/* special_function */
773 	 "TLSLDM",		/* name */
774 	 FALSE,			/* partial_inplace */
775 	 0xffff,		/* src_mask */
776 	 0xffff,		/* dst_mask */
777 	 FALSE),		/* pcrel_offset */
778 
779   /* A dynamic relocation for a DTP module entry.  */
780   HOWTO (R_ALPHA_DTPMOD64,	/* type */
781 	 0,			/* rightshift */
782 	 4,			/* size (0 = byte, 1 = short, 2 = long) */
783 	 64,			/* bitsize */
784 	 FALSE,			/* pc_relative */
785 	 0,			/* bitpos */
786 	 complain_overflow_bitfield, /* complain_on_overflow */
787 	 0,			/* special_function */
788 	 "DTPMOD64",		/* name */
789 	 FALSE,			/* partial_inplace */
790 	 MINUS_ONE,		/* src_mask */
791 	 MINUS_ONE,		/* dst_mask */
792 	 FALSE),		/* pcrel_offset */
793 
794   /* Creates a 64-bit offset in the got for the displacement
795      from DTP to the target.  */
796   HOWTO (R_ALPHA_GOTDTPREL,	/* type */
797 	 0,			/* rightshift */
798 	 1,			/* size (0 = byte, 1 = short, 2 = long) */
799 	 16,			/* bitsize */
800 	 FALSE,			/* pc_relative */
801 	 0,			/* bitpos */
802 	 complain_overflow_signed, /* complain_on_overflow */
803 	 0,			/* special_function */
804 	 "GOTDTPREL",		/* name */
805 	 FALSE,			/* partial_inplace */
806 	 0xffff,		/* src_mask */
807 	 0xffff,		/* dst_mask */
808 	 FALSE),		/* pcrel_offset */
809 
810   /* A dynamic relocation for a displacement from DTP to the target.  */
811   HOWTO (R_ALPHA_DTPREL64,	/* type */
812 	 0,			/* rightshift */
813 	 4,			/* size (0 = byte, 1 = short, 2 = long) */
814 	 64,			/* bitsize */
815 	 FALSE,			/* pc_relative */
816 	 0,			/* bitpos */
817 	 complain_overflow_bitfield, /* complain_on_overflow */
818 	 0,			/* special_function */
819 	 "DTPREL64",		/* name */
820 	 FALSE,			/* partial_inplace */
821 	 MINUS_ONE,		/* src_mask */
822 	 MINUS_ONE,		/* dst_mask */
823 	 FALSE),		/* pcrel_offset */
824 
825   /* The high 16 bits of the displacement from DTP to the target.  */
826   HOWTO (R_ALPHA_DTPRELHI,	/* type */
827 	 0,			/* rightshift */
828 	 1,			/* size (0 = byte, 1 = short, 2 = long) */
829 	 16,			/* bitsize */
830 	 FALSE,			/* pc_relative */
831 	 0,			/* bitpos */
832 	 complain_overflow_signed, /* complain_on_overflow */
833 	 0,			/* special_function */
834 	 "DTPRELHI",		/* name */
835 	 FALSE,			/* partial_inplace */
836 	 0xffff,		/* src_mask */
837 	 0xffff,		/* dst_mask */
838 	 FALSE),		/* pcrel_offset */
839 
840   /* The low 16 bits of the displacement from DTP to the target.  */
841   HOWTO (R_ALPHA_DTPRELLO,	/* type */
842 	 0,			/* rightshift */
843 	 1,			/* size (0 = byte, 1 = short, 2 = long) */
844 	 16,			/* bitsize */
845 	 FALSE,			/* pc_relative */
846 	 0,			/* bitpos */
847 	 complain_overflow_dont, /* complain_on_overflow */
848 	 0,			/* special_function */
849 	 "DTPRELLO",		/* name */
850 	 FALSE,			/* partial_inplace */
851 	 0xffff,		/* src_mask */
852 	 0xffff,		/* dst_mask */
853 	 FALSE),		/* pcrel_offset */
854 
855   /* A 16-bit displacement from DTP to the target.  */
856   HOWTO (R_ALPHA_DTPREL16,	/* type */
857 	 0,			/* rightshift */
858 	 1,			/* size (0 = byte, 1 = short, 2 = long) */
859 	 16,			/* bitsize */
860 	 FALSE,			/* pc_relative */
861 	 0,			/* bitpos */
862 	 complain_overflow_signed, /* complain_on_overflow */
863 	 0,			/* special_function */
864 	 "DTPREL16",		/* name */
865 	 FALSE,			/* partial_inplace */
866 	 0xffff,		/* src_mask */
867 	 0xffff,		/* dst_mask */
868 	 FALSE),		/* pcrel_offset */
869 
870   /* Creates a 64-bit offset in the got for the displacement
871      from TP to the target.  */
872   HOWTO (R_ALPHA_GOTTPREL,	/* type */
873 	 0,			/* rightshift */
874 	 1,			/* size (0 = byte, 1 = short, 2 = long) */
875 	 16,			/* bitsize */
876 	 FALSE,			/* pc_relative */
877 	 0,			/* bitpos */
878 	 complain_overflow_signed, /* complain_on_overflow */
879 	 0,			/* special_function */
880 	 "GOTTPREL",		/* name */
881 	 FALSE,			/* partial_inplace */
882 	 0xffff,		/* src_mask */
883 	 0xffff,		/* dst_mask */
884 	 FALSE),		/* pcrel_offset */
885 
886   /* A dynamic relocation for a displacement from TP to the target.  */
887   HOWTO (R_ALPHA_TPREL64,	/* type */
888 	 0,			/* rightshift */
889 	 4,			/* size (0 = byte, 1 = short, 2 = long) */
890 	 64,			/* bitsize */
891 	 FALSE,			/* pc_relative */
892 	 0,			/* bitpos */
893 	 complain_overflow_bitfield, /* complain_on_overflow */
894 	 0,			/* special_function */
895 	 "TPREL64",		/* name */
896 	 FALSE,			/* partial_inplace */
897 	 MINUS_ONE,		/* src_mask */
898 	 MINUS_ONE,		/* dst_mask */
899 	 FALSE),		/* pcrel_offset */
900 
901   /* The high 16 bits of the displacement from TP to the target.  */
902   HOWTO (R_ALPHA_TPRELHI,	/* type */
903 	 0,			/* rightshift */
904 	 1,			/* size (0 = byte, 1 = short, 2 = long) */
905 	 16,			/* bitsize */
906 	 FALSE,			/* pc_relative */
907 	 0,			/* bitpos */
908 	 complain_overflow_signed, /* complain_on_overflow */
909 	 0,			/* special_function */
910 	 "TPRELHI",		/* name */
911 	 FALSE,			/* partial_inplace */
912 	 0xffff,		/* src_mask */
913 	 0xffff,		/* dst_mask */
914 	 FALSE),		/* pcrel_offset */
915 
916   /* The low 16 bits of the displacement from TP to the target.  */
917   HOWTO (R_ALPHA_TPRELLO,	/* 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 	 0,			/* special_function */
925 	 "TPRELLO",		/* name */
926 	 FALSE,			/* partial_inplace */
927 	 0xffff,		/* src_mask */
928 	 0xffff,		/* dst_mask */
929 	 FALSE),		/* pcrel_offset */
930 
931   /* A 16-bit displacement from TP to the target.  */
932   HOWTO (R_ALPHA_TPREL16,	/* type */
933 	 0,			/* rightshift */
934 	 1,			/* size (0 = byte, 1 = short, 2 = long) */
935 	 16,			/* bitsize */
936 	 FALSE,			/* pc_relative */
937 	 0,			/* bitpos */
938 	 complain_overflow_signed, /* complain_on_overflow */
939 	 0,			/* special_function */
940 	 "TPREL16",		/* name */
941 	 FALSE,			/* partial_inplace */
942 	 0xffff,		/* src_mask */
943 	 0xffff,		/* dst_mask */
944 	 FALSE),		/* pcrel_offset */
945 };
946 
947 /* A relocation function which doesn't do anything.  */
948 
949 static bfd_reloc_status_type
elf64_alpha_reloc_nil(abfd,reloc,sym,data,sec,output_bfd,error_message)950 elf64_alpha_reloc_nil (abfd, reloc, sym, data, sec, output_bfd, error_message)
951      bfd *abfd ATTRIBUTE_UNUSED;
952      arelent *reloc;
953      asymbol *sym ATTRIBUTE_UNUSED;
954      PTR data ATTRIBUTE_UNUSED;
955      asection *sec;
956      bfd *output_bfd;
957      char **error_message ATTRIBUTE_UNUSED;
958 {
959   if (output_bfd)
960     reloc->address += sec->output_offset;
961   return bfd_reloc_ok;
962 }
963 
964 /* A relocation function used for an unsupported reloc.  */
965 
966 static bfd_reloc_status_type
elf64_alpha_reloc_bad(abfd,reloc,sym,data,sec,output_bfd,error_message)967 elf64_alpha_reloc_bad (abfd, reloc, sym, data, sec, output_bfd, error_message)
968      bfd *abfd ATTRIBUTE_UNUSED;
969      arelent *reloc;
970      asymbol *sym ATTRIBUTE_UNUSED;
971      PTR data ATTRIBUTE_UNUSED;
972      asection *sec;
973      bfd *output_bfd;
974      char **error_message ATTRIBUTE_UNUSED;
975 {
976   if (output_bfd)
977     reloc->address += sec->output_offset;
978   return bfd_reloc_notsupported;
979 }
980 
981 /* Do the work of the GPDISP relocation.  */
982 
983 static bfd_reloc_status_type
elf64_alpha_do_reloc_gpdisp(abfd,gpdisp,p_ldah,p_lda)984 elf64_alpha_do_reloc_gpdisp (abfd, gpdisp, p_ldah, p_lda)
985      bfd *abfd;
986      bfd_vma gpdisp;
987      bfd_byte *p_ldah;
988      bfd_byte *p_lda;
989 {
990   bfd_reloc_status_type ret = bfd_reloc_ok;
991   bfd_vma addend;
992   unsigned long i_ldah, i_lda;
993 
994   i_ldah = bfd_get_32 (abfd, p_ldah);
995   i_lda = bfd_get_32 (abfd, p_lda);
996 
997   /* Complain if the instructions are not correct.  */
998   if (((i_ldah >> 26) & 0x3f) != 0x09
999       || ((i_lda >> 26) & 0x3f) != 0x08)
1000     ret = bfd_reloc_dangerous;
1001 
1002   /* Extract the user-supplied offset, mirroring the sign extensions
1003      that the instructions perform.  */
1004   addend = ((i_ldah & 0xffff) << 16) | (i_lda & 0xffff);
1005   addend = (addend ^ 0x80008000) - 0x80008000;
1006 
1007   gpdisp += addend;
1008 
1009   if ((bfd_signed_vma) gpdisp < -(bfd_signed_vma) 0x80000000
1010       || (bfd_signed_vma) gpdisp >= (bfd_signed_vma) 0x7fff8000)
1011     ret = bfd_reloc_overflow;
1012 
1013   /* compensate for the sign extension again.  */
1014   i_ldah = ((i_ldah & 0xffff0000)
1015 	    | (((gpdisp >> 16) + ((gpdisp >> 15) & 1)) & 0xffff));
1016   i_lda = (i_lda & 0xffff0000) | (gpdisp & 0xffff);
1017 
1018   bfd_put_32 (abfd, (bfd_vma) i_ldah, p_ldah);
1019   bfd_put_32 (abfd, (bfd_vma) i_lda, p_lda);
1020 
1021   return ret;
1022 }
1023 
1024 /* The special function for the GPDISP reloc.  */
1025 
1026 static bfd_reloc_status_type
elf64_alpha_reloc_gpdisp(abfd,reloc_entry,sym,data,input_section,output_bfd,err_msg)1027 elf64_alpha_reloc_gpdisp (abfd, reloc_entry, sym, data, input_section,
1028 			  output_bfd, err_msg)
1029      bfd *abfd;
1030      arelent *reloc_entry;
1031      asymbol *sym ATTRIBUTE_UNUSED;
1032      PTR data;
1033      asection *input_section;
1034      bfd *output_bfd;
1035      char **err_msg;
1036 {
1037   bfd_reloc_status_type ret;
1038   bfd_vma gp, relocation;
1039   bfd_byte *p_ldah, *p_lda;
1040 
1041   /* Don't do anything if we're not doing a final link.  */
1042   if (output_bfd)
1043     {
1044       reloc_entry->address += input_section->output_offset;
1045       return bfd_reloc_ok;
1046     }
1047 
1048   if (reloc_entry->address > input_section->_cooked_size ||
1049       reloc_entry->address + reloc_entry->addend > input_section->_cooked_size)
1050     return bfd_reloc_outofrange;
1051 
1052   /* The gp used in the portion of the output object to which this
1053      input object belongs is cached on the input bfd.  */
1054   gp = _bfd_get_gp_value (abfd);
1055 
1056   relocation = (input_section->output_section->vma
1057 		+ input_section->output_offset
1058 		+ reloc_entry->address);
1059 
1060   p_ldah = (bfd_byte *) data + reloc_entry->address;
1061   p_lda = p_ldah + reloc_entry->addend;
1062 
1063   ret = elf64_alpha_do_reloc_gpdisp (abfd, gp - relocation, p_ldah, p_lda);
1064 
1065   /* Complain if the instructions are not correct.  */
1066   if (ret == bfd_reloc_dangerous)
1067     *err_msg = _("GPDISP relocation did not find ldah and lda instructions");
1068 
1069   return ret;
1070 }
1071 
1072 /* A mapping from BFD reloc types to Alpha ELF reloc types.  */
1073 
1074 struct elf_reloc_map
1075 {
1076   bfd_reloc_code_real_type bfd_reloc_val;
1077   int elf_reloc_val;
1078 };
1079 
1080 static const struct elf_reloc_map elf64_alpha_reloc_map[] =
1081 {
1082   {BFD_RELOC_NONE,			R_ALPHA_NONE},
1083   {BFD_RELOC_32,			R_ALPHA_REFLONG},
1084   {BFD_RELOC_64,			R_ALPHA_REFQUAD},
1085   {BFD_RELOC_CTOR,			R_ALPHA_REFQUAD},
1086   {BFD_RELOC_GPREL32,			R_ALPHA_GPREL32},
1087   {BFD_RELOC_ALPHA_ELF_LITERAL,		R_ALPHA_LITERAL},
1088   {BFD_RELOC_ALPHA_LITUSE,		R_ALPHA_LITUSE},
1089   {BFD_RELOC_ALPHA_GPDISP,		R_ALPHA_GPDISP},
1090   {BFD_RELOC_23_PCREL_S2,		R_ALPHA_BRADDR},
1091   {BFD_RELOC_ALPHA_HINT,		R_ALPHA_HINT},
1092   {BFD_RELOC_16_PCREL,			R_ALPHA_SREL16},
1093   {BFD_RELOC_32_PCREL,			R_ALPHA_SREL32},
1094   {BFD_RELOC_64_PCREL,			R_ALPHA_SREL64},
1095   {BFD_RELOC_ALPHA_GPREL_HI16,		R_ALPHA_GPRELHIGH},
1096   {BFD_RELOC_ALPHA_GPREL_LO16,		R_ALPHA_GPRELLOW},
1097   {BFD_RELOC_GPREL16,			R_ALPHA_GPREL16},
1098   {BFD_RELOC_ALPHA_BRSGP,		R_ALPHA_BRSGP},
1099   {BFD_RELOC_ALPHA_TLSGD,		R_ALPHA_TLSGD},
1100   {BFD_RELOC_ALPHA_TLSLDM,		R_ALPHA_TLSLDM},
1101   {BFD_RELOC_ALPHA_DTPMOD64,		R_ALPHA_DTPMOD64},
1102   {BFD_RELOC_ALPHA_GOTDTPREL16,		R_ALPHA_GOTDTPREL},
1103   {BFD_RELOC_ALPHA_DTPREL64,		R_ALPHA_DTPREL64},
1104   {BFD_RELOC_ALPHA_DTPREL_HI16,		R_ALPHA_DTPRELHI},
1105   {BFD_RELOC_ALPHA_DTPREL_LO16,		R_ALPHA_DTPRELLO},
1106   {BFD_RELOC_ALPHA_DTPREL16,		R_ALPHA_DTPREL16},
1107   {BFD_RELOC_ALPHA_GOTTPREL16,		R_ALPHA_GOTTPREL},
1108   {BFD_RELOC_ALPHA_TPREL64,		R_ALPHA_TPREL64},
1109   {BFD_RELOC_ALPHA_TPREL_HI16,		R_ALPHA_TPRELHI},
1110   {BFD_RELOC_ALPHA_TPREL_LO16,		R_ALPHA_TPRELLO},
1111   {BFD_RELOC_ALPHA_TPREL16,		R_ALPHA_TPREL16},
1112 };
1113 
1114 /* Given a BFD reloc type, return a HOWTO structure.  */
1115 
1116 static reloc_howto_type *
elf64_alpha_bfd_reloc_type_lookup(abfd,code)1117 elf64_alpha_bfd_reloc_type_lookup (abfd, code)
1118      bfd *abfd ATTRIBUTE_UNUSED;
1119      bfd_reloc_code_real_type code;
1120 {
1121   const struct elf_reloc_map *i, *e;
1122   i = e = elf64_alpha_reloc_map;
1123   e += sizeof (elf64_alpha_reloc_map) / sizeof (struct elf_reloc_map);
1124   for (; i != e; ++i)
1125     {
1126       if (i->bfd_reloc_val == code)
1127 	return &elf64_alpha_howto_table[i->elf_reloc_val];
1128     }
1129   return 0;
1130 }
1131 
1132 /* Given an Alpha ELF reloc type, fill in an arelent structure.  */
1133 
1134 static void
elf64_alpha_info_to_howto(abfd,cache_ptr,dst)1135 elf64_alpha_info_to_howto (abfd, cache_ptr, dst)
1136      bfd *abfd ATTRIBUTE_UNUSED;
1137      arelent *cache_ptr;
1138      Elf_Internal_Rela *dst;
1139 {
1140   unsigned r_type;
1141 
1142   r_type = ELF64_R_TYPE(dst->r_info);
1143   BFD_ASSERT (r_type < (unsigned int) R_ALPHA_max);
1144   cache_ptr->howto = &elf64_alpha_howto_table[r_type];
1145 }
1146 
1147 /* These two relocations create a two-word entry in the got.  */
1148 #define alpha_got_entry_size(r_type) \
1149   (r_type == R_ALPHA_TLSGD || r_type == R_ALPHA_TLSLDM ? 16 : 8)
1150 
1151 /* This is PT_TLS segment p_vaddr.  */
1152 #define alpha_get_dtprel_base(info) \
1153   (elf_hash_table (info)->tls_sec->vma)
1154 
1155 /* Main program TLS (whose template starts at PT_TLS p_vaddr)
1156    is assigned offset round(16, PT_TLS p_align).  */
1157 #define alpha_get_tprel_base(info) \
1158   (elf_hash_table (info)->tls_sec->vma					\
1159    - align_power ((bfd_vma) 16,						\
1160 		  elf_hash_table (info)->tls_sec->alignment_power))
1161 
1162 /* These functions do relaxation for Alpha ELF.
1163 
1164    Currently I'm only handling what I can do with existing compiler
1165    and assembler support, which means no instructions are removed,
1166    though some may be nopped.  At this time GCC does not emit enough
1167    information to do all of the relaxing that is possible.  It will
1168    take some not small amount of work for that to happen.
1169 
1170    There are a couple of interesting papers that I once read on this
1171    subject, that I cannot find references to at the moment, that
1172    related to Alpha in particular.  They are by David Wall, then of
1173    DEC WRL.  */
1174 
1175 #define OP_LDA		0x08
1176 #define OP_LDAH		0x09
1177 #define INSN_JSR	0x68004000
1178 #define INSN_JSR_MASK	0xfc00c000
1179 #define OP_LDQ		0x29
1180 #define OP_BR		0x30
1181 #define OP_BSR		0x34
1182 #define INSN_UNOP	0x2ffe0000
1183 #define INSN_ADDQ	0x40000400
1184 #define INSN_RDUNIQ	0x0000009e
1185 
1186 struct alpha_relax_info
1187 {
1188   bfd *abfd;
1189   asection *sec;
1190   bfd_byte *contents;
1191   Elf_Internal_Shdr *symtab_hdr;
1192   Elf_Internal_Rela *relocs, *relend;
1193   struct bfd_link_info *link_info;
1194   bfd_vma gp;
1195   bfd *gotobj;
1196   asection *tsec;
1197   struct alpha_elf_link_hash_entry *h;
1198   struct alpha_elf_got_entry **first_gotent;
1199   struct alpha_elf_got_entry *gotent;
1200   bfd_boolean changed_contents;
1201   bfd_boolean changed_relocs;
1202   unsigned char other;
1203 };
1204 
1205 static bfd_boolean elf64_alpha_relax_with_lituse
1206   PARAMS((struct alpha_relax_info *info, bfd_vma symval,
1207           Elf_Internal_Rela *irel));
1208 static bfd_vma elf64_alpha_relax_opt_call
1209   PARAMS((struct alpha_relax_info *info, bfd_vma symval));
1210 static bfd_boolean elf64_alpha_relax_got_load
1211   PARAMS((struct alpha_relax_info *info, bfd_vma symval,
1212           Elf_Internal_Rela *irel, unsigned long));
1213 static bfd_boolean elf64_alpha_relax_gprelhilo
1214   PARAMS((struct alpha_relax_info *info, bfd_vma symval,
1215           Elf_Internal_Rela *irel, bfd_boolean));
1216 static bfd_boolean elf64_alpha_relax_tls_get_addr
1217   PARAMS((struct alpha_relax_info *info, bfd_vma symval,
1218           Elf_Internal_Rela *irel, bfd_boolean));
1219 static bfd_boolean elf64_alpha_relax_section
1220   PARAMS((bfd *abfd, asection *sec, struct bfd_link_info *link_info,
1221 	  bfd_boolean *again));
1222 
1223 static Elf_Internal_Rela *
elf64_alpha_find_reloc_at_ofs(rel,relend,offset,type)1224 elf64_alpha_find_reloc_at_ofs (rel, relend, offset, type)
1225      Elf_Internal_Rela *rel, *relend;
1226      bfd_vma offset;
1227      int type;
1228 {
1229   while (rel < relend)
1230     {
1231       if (rel->r_offset == offset
1232 	  && ELF64_R_TYPE (rel->r_info) == (unsigned int) type)
1233 	return rel;
1234       ++rel;
1235     }
1236   return NULL;
1237 }
1238 
1239 static bfd_boolean
elf64_alpha_relax_with_lituse(info,symval,irel)1240 elf64_alpha_relax_with_lituse (info, symval, irel)
1241      struct alpha_relax_info *info;
1242      bfd_vma symval;
1243      Elf_Internal_Rela *irel;
1244 {
1245   Elf_Internal_Rela *urel, *irelend = info->relend;
1246   int flags, count, i;
1247   bfd_signed_vma disp;
1248   bfd_boolean fits16;
1249   bfd_boolean fits32;
1250   bfd_boolean lit_reused = FALSE;
1251   bfd_boolean all_optimized = TRUE;
1252   unsigned int lit_insn;
1253 
1254   lit_insn = bfd_get_32 (info->abfd, info->contents + irel->r_offset);
1255   if (lit_insn >> 26 != OP_LDQ)
1256     {
1257       ((*_bfd_error_handler)
1258        ("%s: %s+0x%lx: warning: LITERAL relocation against unexpected insn",
1259 	bfd_archive_filename (info->abfd), info->sec->name,
1260 	(unsigned long) irel->r_offset));
1261       return TRUE;
1262     }
1263 
1264   /* Can't relax dynamic symbols.  */
1265   if (alpha_elf_dynamic_symbol_p (&info->h->root, info->link_info))
1266     return TRUE;
1267 
1268   /* Summarize how this particular LITERAL is used.  */
1269   for (urel = irel+1, flags = count = 0; urel < irelend; ++urel, ++count)
1270     {
1271       if (ELF64_R_TYPE (urel->r_info) != R_ALPHA_LITUSE)
1272 	break;
1273       if (urel->r_addend <= 3)
1274 	flags |= 1 << urel->r_addend;
1275     }
1276 
1277   /* A little preparation for the loop...  */
1278   disp = symval - info->gp;
1279 
1280   for (urel = irel+1, i = 0; i < count; ++i, ++urel)
1281     {
1282       unsigned int insn;
1283       int insn_disp;
1284       bfd_signed_vma xdisp;
1285 
1286       insn = bfd_get_32 (info->abfd, info->contents + urel->r_offset);
1287 
1288       switch (urel->r_addend)
1289 	{
1290 	case LITUSE_ALPHA_ADDR:
1291 	default:
1292 	  /* This type is really just a placeholder to note that all
1293 	     uses cannot be optimized, but to still allow some.  */
1294 	  all_optimized = FALSE;
1295 	  break;
1296 
1297 	case LITUSE_ALPHA_BASE:
1298 	  /* We can always optimize 16-bit displacements.  */
1299 
1300 	  /* Extract the displacement from the instruction, sign-extending
1301 	     it if necessary, then test whether it is within 16 or 32 bits
1302 	     displacement from GP.  */
1303 	  insn_disp = insn & 0x0000ffff;
1304 	  if (insn_disp & 0x8000)
1305 	    insn_disp |= ~0xffff;  /* Negative: sign-extend.  */
1306 
1307 	  xdisp = disp + insn_disp;
1308 	  fits16 = (xdisp >= - (bfd_signed_vma) 0x8000 && xdisp < 0x8000);
1309 	  fits32 = (xdisp >= - (bfd_signed_vma) 0x80000000
1310 		    && xdisp < 0x7fff8000);
1311 
1312 	  if (fits16)
1313 	    {
1314 	      /* Take the op code and dest from this insn, take the base
1315 		 register from the literal insn.  Leave the offset alone.  */
1316 	      insn = (insn & 0xffe0ffff) | (lit_insn & 0x001f0000);
1317 	      urel->r_info = ELF64_R_INFO (ELF64_R_SYM (irel->r_info),
1318 					   R_ALPHA_GPREL16);
1319 	      urel->r_addend = irel->r_addend;
1320 	      info->changed_relocs = TRUE;
1321 
1322 	      bfd_put_32 (info->abfd, (bfd_vma) insn,
1323 			  info->contents + urel->r_offset);
1324 	      info->changed_contents = TRUE;
1325 	    }
1326 
1327 	  /* If all mem+byte, we can optimize 32-bit mem displacements.  */
1328 	  else if (fits32 && !(flags & ~6))
1329 	    {
1330 	      /* FIXME: sanity check that lit insn Ra is mem insn Rb.  */
1331 
1332 	      irel->r_info = ELF64_R_INFO (ELF64_R_SYM (irel->r_info),
1333 					   R_ALPHA_GPRELHIGH);
1334 	      lit_insn = (OP_LDAH << 26) | (lit_insn & 0x03ff0000);
1335 	      bfd_put_32 (info->abfd, (bfd_vma) lit_insn,
1336 			  info->contents + irel->r_offset);
1337 	      lit_reused = TRUE;
1338 	      info->changed_contents = TRUE;
1339 
1340 	      urel->r_info = ELF64_R_INFO (ELF64_R_SYM (irel->r_info),
1341 					   R_ALPHA_GPRELLOW);
1342 	      urel->r_addend = irel->r_addend;
1343 	      info->changed_relocs = TRUE;
1344 	    }
1345 	  else
1346 	    all_optimized = FALSE;
1347 	  break;
1348 
1349 	case LITUSE_ALPHA_BYTOFF:
1350 	  /* We can always optimize byte instructions.  */
1351 
1352 	  /* FIXME: sanity check the insn for byte op.  Check that the
1353 	     literal dest reg is indeed Rb in the byte insn.  */
1354 
1355 	  insn &= ~ (unsigned) 0x001ff000;
1356 	  insn |= ((symval & 7) << 13) | 0x1000;
1357 
1358 	  urel->r_info = ELF64_R_INFO (0, R_ALPHA_NONE);
1359 	  urel->r_addend = 0;
1360 	  info->changed_relocs = TRUE;
1361 
1362 	  bfd_put_32 (info->abfd, (bfd_vma) insn,
1363 		      info->contents + urel->r_offset);
1364 	  info->changed_contents = TRUE;
1365 	  break;
1366 
1367 	case LITUSE_ALPHA_JSR:
1368 	case LITUSE_ALPHA_TLSGD:
1369 	case LITUSE_ALPHA_TLSLDM:
1370 	  {
1371 	    bfd_vma optdest, org;
1372 	    bfd_signed_vma odisp;
1373 
1374 	    /* If not zero, place to jump without needing pv.  */
1375 	    optdest = elf64_alpha_relax_opt_call (info, symval);
1376 	    org = (info->sec->output_section->vma
1377 		   + info->sec->output_offset
1378 		   + urel->r_offset + 4);
1379 	    odisp = (optdest ? optdest : symval) - org;
1380 
1381 	    if (odisp >= -0x400000 && odisp < 0x400000)
1382 	      {
1383 		Elf_Internal_Rela *xrel;
1384 
1385 		/* Preserve branch prediction call stack when possible.  */
1386 		if ((insn & INSN_JSR_MASK) == INSN_JSR)
1387 		  insn = (OP_BSR << 26) | (insn & 0x03e00000);
1388 		else
1389 		  insn = (OP_BR << 26) | (insn & 0x03e00000);
1390 
1391 		urel->r_info = ELF64_R_INFO (ELF64_R_SYM (irel->r_info),
1392 					     R_ALPHA_BRADDR);
1393 		urel->r_addend = irel->r_addend;
1394 
1395 		if (optdest)
1396 		  urel->r_addend += optdest - symval;
1397 		else
1398 		  all_optimized = FALSE;
1399 
1400 		bfd_put_32 (info->abfd, (bfd_vma) insn,
1401 			    info->contents + urel->r_offset);
1402 
1403 		/* Kill any HINT reloc that might exist for this insn.  */
1404 		xrel = (elf64_alpha_find_reloc_at_ofs
1405 			(info->relocs, info->relend, urel->r_offset,
1406 			 R_ALPHA_HINT));
1407 		if (xrel)
1408 		  xrel->r_info = ELF64_R_INFO (0, R_ALPHA_NONE);
1409 
1410 		info->changed_contents = TRUE;
1411 		info->changed_relocs = TRUE;
1412 	      }
1413 	    else
1414 	      all_optimized = FALSE;
1415 
1416 	    /* Even if the target is not in range for a direct branch,
1417 	       if we share a GP, we can eliminate the gp reload.  */
1418 	    if (optdest)
1419 	      {
1420 		Elf_Internal_Rela *gpdisp
1421 		  = (elf64_alpha_find_reloc_at_ofs
1422 		     (info->relocs, irelend, urel->r_offset + 4,
1423 		      R_ALPHA_GPDISP));
1424 		if (gpdisp)
1425 		  {
1426 		    bfd_byte *p_ldah = info->contents + gpdisp->r_offset;
1427 		    bfd_byte *p_lda = p_ldah + gpdisp->r_addend;
1428 		    unsigned int ldah = bfd_get_32 (info->abfd, p_ldah);
1429 		    unsigned int lda = bfd_get_32 (info->abfd, p_lda);
1430 
1431 		    /* Verify that the instruction is "ldah $29,0($26)".
1432 		       Consider a function that ends in a noreturn call,
1433 		       and that the next function begins with an ldgp,
1434 		       and that by accident there is no padding between.
1435 		       In that case the insn would use $27 as the base.  */
1436 		    if (ldah == 0x27ba0000 && lda == 0x23bd0000)
1437 		      {
1438 			bfd_put_32 (info->abfd, (bfd_vma) INSN_UNOP, p_ldah);
1439 			bfd_put_32 (info->abfd, (bfd_vma) INSN_UNOP, p_lda);
1440 
1441 			gpdisp->r_info = ELF64_R_INFO (0, R_ALPHA_NONE);
1442 			info->changed_contents = TRUE;
1443 			info->changed_relocs = TRUE;
1444 		      }
1445 		  }
1446 	      }
1447 	  }
1448 	  break;
1449 	}
1450     }
1451 
1452   /* If all cases were optimized, we can reduce the use count on this
1453      got entry by one, possibly eliminating it.  */
1454   if (all_optimized)
1455     {
1456       if (--info->gotent->use_count == 0)
1457 	{
1458 	  int sz = alpha_got_entry_size (R_ALPHA_LITERAL);
1459 	  alpha_elf_tdata (info->gotobj)->total_got_size -= sz;
1460 	  if (!info->h)
1461 	    alpha_elf_tdata (info->gotobj)->local_got_size -= sz;
1462 	}
1463 
1464       /* If the literal instruction is no longer needed (it may have been
1465 	 reused.  We can eliminate it.  */
1466       /* ??? For now, I don't want to deal with compacting the section,
1467 	 so just nop it out.  */
1468       if (!lit_reused)
1469 	{
1470 	  irel->r_info = ELF64_R_INFO (0, R_ALPHA_NONE);
1471 	  info->changed_relocs = TRUE;
1472 
1473 	  bfd_put_32 (info->abfd, (bfd_vma) INSN_UNOP,
1474 		      info->contents + irel->r_offset);
1475 	  info->changed_contents = TRUE;
1476 	}
1477     }
1478 
1479   return TRUE;
1480 }
1481 
1482 static bfd_vma
elf64_alpha_relax_opt_call(info,symval)1483 elf64_alpha_relax_opt_call (info, symval)
1484      struct alpha_relax_info *info;
1485      bfd_vma symval;
1486 {
1487   /* If the function has the same gp, and we can identify that the
1488      function does not use its function pointer, we can eliminate the
1489      address load.  */
1490 
1491   /* If the symbol is marked NOPV, we are being told the function never
1492      needs its procedure value.  */
1493   if ((info->other & STO_ALPHA_STD_GPLOAD) == STO_ALPHA_NOPV)
1494     return symval;
1495 
1496   /* If the symbol is marked STD_GP, we are being told the function does
1497      a normal ldgp in the first two words.  */
1498   else if ((info->other & STO_ALPHA_STD_GPLOAD) == STO_ALPHA_STD_GPLOAD)
1499     ;
1500 
1501   /* Otherwise, we may be able to identify a GP load in the first two
1502      words, which we can then skip.  */
1503   else
1504     {
1505       Elf_Internal_Rela *tsec_relocs, *tsec_relend, *tsec_free, *gpdisp;
1506       bfd_vma ofs;
1507 
1508       /* Load the relocations from the section that the target symbol is in.  */
1509       if (info->sec == info->tsec)
1510 	{
1511 	  tsec_relocs = info->relocs;
1512 	  tsec_relend = info->relend;
1513 	  tsec_free = NULL;
1514 	}
1515       else
1516 	{
1517 	  tsec_relocs = (_bfd_elf_link_read_relocs
1518 		         (info->abfd, info->tsec, (PTR) NULL,
1519 			 (Elf_Internal_Rela *) NULL,
1520 			 info->link_info->keep_memory));
1521 	  if (tsec_relocs == NULL)
1522 	    return 0;
1523 	  tsec_relend = tsec_relocs + info->tsec->reloc_count;
1524 	  tsec_free = (info->link_info->keep_memory ? NULL : tsec_relocs);
1525 	}
1526 
1527       /* Recover the symbol's offset within the section.  */
1528       ofs = (symval - info->tsec->output_section->vma
1529 	     - info->tsec->output_offset);
1530 
1531       /* Look for a GPDISP reloc.  */
1532       gpdisp = (elf64_alpha_find_reloc_at_ofs
1533 		(tsec_relocs, tsec_relend, ofs, R_ALPHA_GPDISP));
1534 
1535       if (!gpdisp || gpdisp->r_addend != 4)
1536 	{
1537 	  if (tsec_free)
1538 	    free (tsec_free);
1539 	  return 0;
1540 	}
1541       if (tsec_free)
1542         free (tsec_free);
1543     }
1544 
1545   /* We've now determined that we can skip an initial gp load.  Verify
1546      that the call and the target use the same gp.   */
1547   if (info->link_info->hash->creator != info->tsec->owner->xvec
1548       || info->gotobj != alpha_elf_tdata (info->tsec->owner)->gotobj)
1549     return 0;
1550 
1551   return symval + 8;
1552 }
1553 
1554 static bfd_boolean
elf64_alpha_relax_got_load(info,symval,irel,r_type)1555 elf64_alpha_relax_got_load (info, symval, irel, r_type)
1556      struct alpha_relax_info *info;
1557      bfd_vma symval;
1558      Elf_Internal_Rela *irel;
1559      unsigned long r_type;
1560 {
1561   unsigned int insn;
1562   bfd_signed_vma disp;
1563 
1564   /* Get the instruction.  */
1565   insn = bfd_get_32 (info->abfd, info->contents + irel->r_offset);
1566 
1567   if (insn >> 26 != OP_LDQ)
1568     {
1569       reloc_howto_type *howto = elf64_alpha_howto_table + r_type;
1570       ((*_bfd_error_handler)
1571        ("%s: %s+0x%lx: warning: %s relocation against unexpected insn",
1572 	bfd_archive_filename (info->abfd), info->sec->name,
1573 	(unsigned long) irel->r_offset, howto->name));
1574       return TRUE;
1575     }
1576 
1577   /* Can't relax dynamic symbols.  */
1578   if (alpha_elf_dynamic_symbol_p (&info->h->root, info->link_info))
1579     return TRUE;
1580 
1581   /* Can't use local-exec relocations in shared libraries.  */
1582   if (r_type == R_ALPHA_GOTTPREL && info->link_info->shared)
1583     return TRUE;
1584 
1585   if (r_type == R_ALPHA_LITERAL)
1586     disp = symval - info->gp;
1587   else
1588     {
1589       bfd_vma dtp_base, tp_base;
1590 
1591       BFD_ASSERT (elf_hash_table (info->link_info)->tls_sec != NULL);
1592       dtp_base = alpha_get_dtprel_base (info->link_info);
1593       tp_base = alpha_get_tprel_base (info->link_info);
1594       disp = symval - (r_type == R_ALPHA_GOTDTPREL ? dtp_base : tp_base);
1595     }
1596 
1597   if (disp < -0x8000 || disp >= 0x8000)
1598     return TRUE;
1599 
1600   /* Exchange LDQ for LDA.  In the case of the TLS relocs, we're loading
1601      a constant, so force the base register to be $31.  */
1602   if (r_type == R_ALPHA_LITERAL)
1603     insn = (OP_LDA << 26) | (insn & 0x03ff0000);
1604   else
1605     insn = (OP_LDA << 26) | (insn & (31 << 21)) | (31 << 16);
1606   bfd_put_32 (info->abfd, (bfd_vma) insn, info->contents + irel->r_offset);
1607   info->changed_contents = TRUE;
1608 
1609   /* Reduce the use count on this got entry by one, possibly
1610      eliminating it.  */
1611   if (--info->gotent->use_count == 0)
1612     {
1613       int sz = alpha_got_entry_size (r_type);
1614       alpha_elf_tdata (info->gotobj)->total_got_size -= sz;
1615       if (!info->h)
1616 	alpha_elf_tdata (info->gotobj)->local_got_size -= sz;
1617     }
1618 
1619   /* Smash the existing GOT relocation for its 16-bit immediate pair.  */
1620   switch (r_type)
1621     {
1622     case R_ALPHA_LITERAL:
1623       r_type = R_ALPHA_GPREL16;
1624       break;
1625     case R_ALPHA_GOTDTPREL:
1626       r_type = R_ALPHA_DTPREL16;
1627       break;
1628     case R_ALPHA_GOTTPREL:
1629       r_type = R_ALPHA_TPREL16;
1630       break;
1631     default:
1632       BFD_ASSERT (0);
1633       return FALSE;
1634     }
1635 
1636   irel->r_info = ELF64_R_INFO (ELF64_R_SYM (irel->r_info), r_type);
1637   info->changed_relocs = TRUE;
1638 
1639   /* ??? Search forward through this basic block looking for insns
1640      that use the target register.  Stop after an insn modifying the
1641      register is seen, or after a branch or call.
1642 
1643      Any such memory load insn may be substituted by a load directly
1644      off the GP.  This allows the memory load insn to be issued before
1645      the calculated GP register would otherwise be ready.
1646 
1647      Any such jsr insn can be replaced by a bsr if it is in range.
1648 
1649      This would mean that we'd have to _add_ relocations, the pain of
1650      which gives one pause.  */
1651 
1652   return TRUE;
1653 }
1654 
1655 static bfd_boolean
elf64_alpha_relax_gprelhilo(info,symval,irel,hi)1656 elf64_alpha_relax_gprelhilo (info, symval, irel, hi)
1657      struct alpha_relax_info *info;
1658      bfd_vma symval;
1659      Elf_Internal_Rela *irel;
1660      bfd_boolean hi;
1661 {
1662   unsigned int insn;
1663   bfd_signed_vma disp;
1664   bfd_byte *pos = info->contents + irel->r_offset;
1665 
1666   /* ??? This assumes that the compiler doesn't render
1667 
1668 	array[i]
1669      as
1670 	ldah	t, array(gp)	!gprelhigh
1671 	s8addl	i, t, t
1672 	ldq	r, array(t)	!gprellow
1673 
1674      which would indeed be the most efficient way to implement this.  */
1675 
1676   return TRUE;
1677 
1678   disp = symval - info->gp;
1679   if (disp < -0x8000 || disp >= 0x8000)
1680     return TRUE;
1681 
1682   if (hi)
1683     {
1684       /* Nop out the high instruction.  */
1685 
1686       bfd_put_32 (info->abfd, (bfd_vma) INSN_UNOP, pos);
1687       info->changed_contents = TRUE;
1688 
1689       irel->r_info = ELF64_R_INFO (0, R_ALPHA_NONE);
1690       irel->r_addend = 0;
1691       info->changed_relocs = TRUE;
1692     }
1693   else
1694     {
1695       /* Adjust the low instruction to reference GP directly.  */
1696 
1697       insn = bfd_get_32 (info->abfd, pos);
1698       insn = (insn & 0xffe00000) | (29 << 16);
1699       bfd_put_32 (info->abfd, (bfd_vma) insn, pos);
1700       info->changed_contents = TRUE;
1701 
1702       irel->r_info = ELF64_R_INFO (ELF64_R_SYM (irel->r_info),
1703 				   R_ALPHA_GPREL16);
1704       info->changed_relocs = TRUE;
1705     }
1706 
1707   return TRUE;
1708 }
1709 
1710 static bfd_boolean
elf64_alpha_relax_tls_get_addr(info,symval,irel,is_gd)1711 elf64_alpha_relax_tls_get_addr (info, symval, irel, is_gd)
1712      struct alpha_relax_info *info;
1713      bfd_vma symval;
1714      Elf_Internal_Rela *irel;
1715      bfd_boolean is_gd;
1716 {
1717   bfd_byte *pos[5];
1718   unsigned int insn;
1719   Elf_Internal_Rela *gpdisp, *hint;
1720   bfd_boolean dynamic, use_gottprel, pos1_unusable;
1721   unsigned long new_symndx;
1722 
1723   dynamic = alpha_elf_dynamic_symbol_p (&info->h->root, info->link_info);
1724 
1725   /* If a TLS symbol is accessed using IE at least once, there is no point
1726      to use dynamic model for it.  */
1727   if (is_gd && info->h && (info->h->flags & ALPHA_ELF_LINK_HASH_TLS_IE))
1728     ;
1729 
1730   /* If the symbol is local, and we've already committed to DF_STATIC_TLS,
1731      then we might as well relax to IE.  */
1732   else if (info->link_info->shared && !dynamic
1733 	   && (info->link_info->flags & DF_STATIC_TLS))
1734     ;
1735 
1736   /* Otherwise we must be building an executable to do anything.  */
1737   else if (info->link_info->shared)
1738     return TRUE;
1739 
1740   /* The TLSGD/TLSLDM relocation must be followed by a LITERAL and
1741      the matching LITUSE_TLS relocations.  */
1742   if (irel + 2 >= info->relend)
1743     return TRUE;
1744   if (ELF64_R_TYPE (irel[1].r_info) != R_ALPHA_LITERAL
1745       || ELF64_R_TYPE (irel[2].r_info) != R_ALPHA_LITUSE
1746       || irel[2].r_addend != (is_gd ? LITUSE_ALPHA_TLSGD : LITUSE_ALPHA_TLSLDM))
1747     return TRUE;
1748 
1749   /* There must be a GPDISP relocation positioned immediately after the
1750      LITUSE relocation.  */
1751   gpdisp = elf64_alpha_find_reloc_at_ofs (info->relocs, info->relend,
1752 					  irel[2].r_offset + 4, R_ALPHA_GPDISP);
1753   if (!gpdisp)
1754     return TRUE;
1755 
1756   pos[0] = info->contents + irel[0].r_offset;
1757   pos[1] = info->contents + irel[1].r_offset;
1758   pos[2] = info->contents + irel[2].r_offset;
1759   pos[3] = info->contents + gpdisp->r_offset;
1760   pos[4] = pos[3] + gpdisp->r_addend;
1761   pos1_unusable = FALSE;
1762 
1763   /* Generally, the positions are not allowed to be out of order, lest the
1764      modified insn sequence have different register lifetimes.  We can make
1765      an exception when pos 1 is adjacent to pos 0.  */
1766   if (pos[1] + 4 == pos[0])
1767     {
1768       bfd_byte *tmp = pos[0];
1769       pos[0] = pos[1];
1770       pos[1] = tmp;
1771     }
1772   else if (pos[1] < pos[0])
1773     pos1_unusable = TRUE;
1774   if (pos[1] >= pos[2] || pos[2] >= pos[3])
1775     return TRUE;
1776 
1777   /* Reduce the use count on the LITERAL relocation.  Do this before we
1778      smash the symndx when we adjust the relocations below.  */
1779   {
1780     struct alpha_elf_got_entry *lit_gotent;
1781     struct alpha_elf_link_hash_entry *lit_h;
1782     unsigned long indx;
1783 
1784     BFD_ASSERT (ELF64_R_SYM (irel[1].r_info) >= info->symtab_hdr->sh_info);
1785     indx = ELF64_R_SYM (irel[1].r_info) - info->symtab_hdr->sh_info;
1786     lit_h = alpha_elf_sym_hashes (info->abfd)[indx];
1787 
1788     while (lit_h->root.root.type == bfd_link_hash_indirect
1789 	   || lit_h->root.root.type == bfd_link_hash_warning)
1790       lit_h = (struct alpha_elf_link_hash_entry *) lit_h->root.root.u.i.link;
1791 
1792     for (lit_gotent = lit_h->got_entries; lit_gotent ;
1793 	 lit_gotent = lit_gotent->next)
1794       if (lit_gotent->gotobj == info->gotobj
1795 	  && lit_gotent->reloc_type == R_ALPHA_LITERAL
1796 	  && lit_gotent->addend == irel[1].r_addend)
1797 	break;
1798     BFD_ASSERT (lit_gotent);
1799 
1800     if (--lit_gotent->use_count == 0)
1801       {
1802 	int sz = alpha_got_entry_size (R_ALPHA_LITERAL);
1803 	alpha_elf_tdata (info->gotobj)->total_got_size -= sz;
1804       }
1805   }
1806 
1807   /* Change
1808 
1809 	lda	$16,x($gp)		!tlsgd!1
1810 	ldq	$27,__tls_get_addr($gp)	!literal!1
1811 	jsr	$26,($27)__tls_get_addr	!lituse_tlsgd!1
1812 	ldah	$29,0($26)		!gpdisp!2
1813 	lda	$29,0($29)		!gpdisp!2
1814      to
1815 	ldq	$16,x($gp)		!gottprel
1816 	unop
1817 	call_pal rduniq
1818 	addq	$16,$0,$0
1819 	unop
1820      or the first pair to
1821 	lda	$16,x($gp)		!tprel
1822 	unop
1823      or
1824 	ldah	$16,x($gp)		!tprelhi
1825 	lda	$16,x($16)		!tprello
1826 
1827      as appropriate.  */
1828 
1829   use_gottprel = FALSE;
1830   new_symndx = is_gd ? ELF64_R_SYM (irel->r_info) : 0;
1831   switch (!dynamic && !info->link_info->shared)
1832     {
1833     case 1:
1834       {
1835 	bfd_vma tp_base;
1836 	bfd_signed_vma disp;
1837 
1838 	BFD_ASSERT (elf_hash_table (info->link_info)->tls_sec != NULL);
1839 	tp_base = alpha_get_tprel_base (info->link_info);
1840 	disp = symval - tp_base;
1841 
1842 	if (disp >= -0x8000 && disp < 0x8000)
1843 	  {
1844 	    insn = (OP_LDA << 26) | (16 << 21) | (31 << 16);
1845 	    bfd_put_32 (info->abfd, (bfd_vma) insn, pos[0]);
1846 	    bfd_put_32 (info->abfd, (bfd_vma) INSN_UNOP, pos[1]);
1847 
1848 	    irel[0].r_offset = pos[0] - info->contents;
1849 	    irel[0].r_info = ELF64_R_INFO (new_symndx, R_ALPHA_TPREL16);
1850 	    irel[1].r_info = ELF64_R_INFO (0, R_ALPHA_NONE);
1851 	    break;
1852 	  }
1853 	else if (disp >= -(bfd_signed_vma) 0x80000000
1854 		 && disp < (bfd_signed_vma) 0x7fff8000
1855 		 && !pos1_unusable)
1856 	  {
1857 	    insn = (OP_LDAH << 26) | (16 << 21) | (31 << 16);
1858 	    bfd_put_32 (info->abfd, (bfd_vma) insn, pos[0]);
1859 	    insn = (OP_LDA << 26) | (16 << 21) | (16 << 16);
1860 	    bfd_put_32 (info->abfd, (bfd_vma) insn, pos[1]);
1861 
1862 	    irel[0].r_offset = pos[0] - info->contents;
1863 	    irel[0].r_info = ELF64_R_INFO (new_symndx, R_ALPHA_TPRELHI);
1864 	    irel[1].r_offset = pos[1] - info->contents;
1865 	    irel[1].r_info = ELF64_R_INFO (new_symndx, R_ALPHA_TPRELLO);
1866 	    break;
1867 	  }
1868       }
1869       /* FALLTHRU */
1870 
1871     default:
1872       use_gottprel = TRUE;
1873 
1874       insn = (OP_LDQ << 26) | (16 << 21) | (29 << 16);
1875       bfd_put_32 (info->abfd, (bfd_vma) insn, pos[0]);
1876       bfd_put_32 (info->abfd, (bfd_vma) INSN_UNOP, pos[1]);
1877 
1878       irel[0].r_offset = pos[0] - info->contents;
1879       irel[0].r_info = ELF64_R_INFO (new_symndx, R_ALPHA_GOTTPREL);
1880       irel[1].r_info = ELF64_R_INFO (0, R_ALPHA_NONE);
1881       break;
1882     }
1883 
1884   bfd_put_32 (info->abfd, (bfd_vma) INSN_RDUNIQ, pos[2]);
1885 
1886   insn = INSN_ADDQ | (16 << 21) | (0 << 16) | (0 << 0);
1887   bfd_put_32 (info->abfd, (bfd_vma) insn, pos[3]);
1888 
1889   bfd_put_32 (info->abfd, (bfd_vma) INSN_UNOP, pos[4]);
1890 
1891   irel[2].r_info = ELF64_R_INFO (0, R_ALPHA_NONE);
1892   gpdisp->r_info = ELF64_R_INFO (0, R_ALPHA_NONE);
1893 
1894   hint = elf64_alpha_find_reloc_at_ofs (info->relocs, info->relend,
1895 					irel[2].r_offset, R_ALPHA_HINT);
1896   if (hint)
1897     hint->r_info = ELF64_R_INFO (0, R_ALPHA_NONE);
1898 
1899   info->changed_contents = TRUE;
1900   info->changed_relocs = TRUE;
1901 
1902   /* Reduce the use count on the TLSGD/TLSLDM relocation.  */
1903   if (--info->gotent->use_count == 0)
1904     {
1905       int sz = alpha_got_entry_size (info->gotent->reloc_type);
1906       alpha_elf_tdata (info->gotobj)->total_got_size -= sz;
1907       if (!info->h)
1908 	alpha_elf_tdata (info->gotobj)->local_got_size -= sz;
1909     }
1910 
1911   /* If we've switched to a GOTTPREL relocation, increment the reference
1912      count on that got entry.  */
1913   if (use_gottprel)
1914     {
1915       struct alpha_elf_got_entry *tprel_gotent;
1916 
1917       for (tprel_gotent = *info->first_gotent; tprel_gotent ;
1918 	   tprel_gotent = tprel_gotent->next)
1919 	if (tprel_gotent->gotobj == info->gotobj
1920 	    && tprel_gotent->reloc_type == R_ALPHA_GOTTPREL
1921 	    && tprel_gotent->addend == irel->r_addend)
1922 	  break;
1923       if (tprel_gotent)
1924 	tprel_gotent->use_count++;
1925       else
1926 	{
1927 	  if (info->gotent->use_count == 0)
1928 	    tprel_gotent = info->gotent;
1929 	  else
1930 	    {
1931 	      tprel_gotent = (struct alpha_elf_got_entry *)
1932 		bfd_alloc (info->abfd, sizeof (struct alpha_elf_got_entry));
1933 	      if (!tprel_gotent)
1934 		return FALSE;
1935 
1936 	      tprel_gotent->next = *info->first_gotent;
1937 	      *info->first_gotent = tprel_gotent;
1938 
1939 	      tprel_gotent->gotobj = info->gotobj;
1940 	      tprel_gotent->addend = irel->r_addend;
1941 	      tprel_gotent->got_offset = -1;
1942 	      tprel_gotent->reloc_done = 0;
1943 	      tprel_gotent->reloc_xlated = 0;
1944 	    }
1945 
1946 	  tprel_gotent->use_count = 1;
1947 	  tprel_gotent->reloc_type = R_ALPHA_GOTTPREL;
1948 	}
1949     }
1950 
1951   return TRUE;
1952 }
1953 
1954 static bfd_boolean
elf64_alpha_relax_section(abfd,sec,link_info,again)1955 elf64_alpha_relax_section (abfd, sec, link_info, again)
1956      bfd *abfd;
1957      asection *sec;
1958      struct bfd_link_info *link_info;
1959      bfd_boolean *again;
1960 {
1961   Elf_Internal_Shdr *symtab_hdr;
1962   Elf_Internal_Rela *internal_relocs;
1963   Elf_Internal_Rela *irel, *irelend;
1964   Elf_Internal_Sym *isymbuf = NULL;
1965   struct alpha_elf_got_entry **local_got_entries;
1966   struct alpha_relax_info info;
1967 
1968   /* We are not currently changing any sizes, so only one pass.  */
1969   *again = FALSE;
1970 
1971   if (link_info->relocatable
1972       || (sec->flags & SEC_RELOC) == 0
1973       || sec->reloc_count == 0)
1974     return TRUE;
1975 
1976   /* If this is the first time we have been called for this section,
1977      initialize the cooked size.  */
1978   if (sec->_cooked_size == 0)
1979     sec->_cooked_size = sec->_raw_size;
1980 
1981   symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1982   local_got_entries = alpha_elf_tdata(abfd)->local_got_entries;
1983 
1984   /* Load the relocations for this section.  */
1985   internal_relocs = (_bfd_elf_link_read_relocs
1986 		     (abfd, sec, (PTR) NULL, (Elf_Internal_Rela *) NULL,
1987 		      link_info->keep_memory));
1988   if (internal_relocs == NULL)
1989     return FALSE;
1990 
1991   memset(&info, 0, sizeof (info));
1992   info.abfd = abfd;
1993   info.sec = sec;
1994   info.link_info = link_info;
1995   info.symtab_hdr = symtab_hdr;
1996   info.relocs = internal_relocs;
1997   info.relend = irelend = internal_relocs + sec->reloc_count;
1998 
1999   /* Find the GP for this object.  Do not store the result back via
2000      _bfd_set_gp_value, since this could change again before final.  */
2001   info.gotobj = alpha_elf_tdata (abfd)->gotobj;
2002   if (info.gotobj)
2003     {
2004       asection *sgot = alpha_elf_tdata (info.gotobj)->got;
2005       info.gp = (sgot->output_section->vma
2006 		 + sgot->output_offset
2007 		 + 0x8000);
2008     }
2009 
2010   /* Get the section contents.  */
2011   if (elf_section_data (sec)->this_hdr.contents != NULL)
2012     info.contents = elf_section_data (sec)->this_hdr.contents;
2013   else
2014     {
2015       info.contents = (bfd_byte *) bfd_malloc (sec->_raw_size);
2016       if (info.contents == NULL)
2017 	goto error_return;
2018 
2019       if (! bfd_get_section_contents (abfd, sec, info.contents,
2020 				      (file_ptr) 0, sec->_raw_size))
2021 	goto error_return;
2022     }
2023 
2024   for (irel = internal_relocs; irel < irelend; irel++)
2025     {
2026       bfd_vma symval;
2027       struct alpha_elf_got_entry *gotent;
2028       unsigned long r_type = ELF64_R_TYPE (irel->r_info);
2029       unsigned long r_symndx = ELF64_R_SYM (irel->r_info);
2030 
2031       /* Early exit for unhandled or unrelaxable relocations.  */
2032       switch (r_type)
2033 	{
2034 	case R_ALPHA_LITERAL:
2035 	case R_ALPHA_GPRELHIGH:
2036 	case R_ALPHA_GPRELLOW:
2037 	case R_ALPHA_GOTDTPREL:
2038 	case R_ALPHA_GOTTPREL:
2039 	case R_ALPHA_TLSGD:
2040 	  break;
2041 
2042 	case R_ALPHA_TLSLDM:
2043 	  /* The symbol for a TLSLDM reloc is ignored.  Collapse the
2044              reloc to the 0 symbol so that they all match.  */
2045 	  r_symndx = 0;
2046 	  break;
2047 
2048 	default:
2049 	  continue;
2050 	}
2051 
2052       /* Get the value of the symbol referred to by the reloc.  */
2053       if (r_symndx < symtab_hdr->sh_info)
2054 	{
2055 	  /* A local symbol.  */
2056 	  Elf_Internal_Sym *isym;
2057 
2058 	  /* Read this BFD's local symbols.  */
2059 	  if (isymbuf == NULL)
2060 	    {
2061 	      isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
2062 	      if (isymbuf == NULL)
2063 		isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
2064 						symtab_hdr->sh_info, 0,
2065 						NULL, NULL, NULL);
2066 	      if (isymbuf == NULL)
2067 		goto error_return;
2068 	    }
2069 
2070 	  isym = isymbuf + r_symndx;
2071 
2072 	  /* Given the symbol for a TLSLDM reloc is ignored, this also
2073 	     means forcing the symbol value to the tp base.  */
2074 	  if (r_type == R_ALPHA_TLSLDM)
2075 	    {
2076 	      info.tsec = bfd_abs_section_ptr;
2077 	      symval = alpha_get_tprel_base (info.link_info);
2078 	    }
2079 	  else
2080 	    {
2081 	      symval = isym->st_value;
2082 	      if (isym->st_shndx == SHN_UNDEF)
2083 	        continue;
2084 	      else if (isym->st_shndx == SHN_ABS)
2085 	        info.tsec = bfd_abs_section_ptr;
2086 	      else if (isym->st_shndx == SHN_COMMON)
2087 	        info.tsec = bfd_com_section_ptr;
2088 	      else
2089 	        info.tsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
2090 	    }
2091 
2092 	  info.h = NULL;
2093 	  info.other = isym->st_other;
2094 	  if (local_got_entries)
2095 	    info.first_gotent = &local_got_entries[r_symndx];
2096 	  else
2097 	    {
2098 	      info.first_gotent = &info.gotent;
2099 	      info.gotent = NULL;
2100 	    }
2101 	}
2102       else
2103 	{
2104 	  unsigned long indx;
2105 	  struct alpha_elf_link_hash_entry *h;
2106 
2107 	  indx = r_symndx - symtab_hdr->sh_info;
2108 	  h = alpha_elf_sym_hashes (abfd)[indx];
2109 	  BFD_ASSERT (h != NULL);
2110 
2111 	  while (h->root.root.type == bfd_link_hash_indirect
2112 		 || h->root.root.type == bfd_link_hash_warning)
2113 	    h = (struct alpha_elf_link_hash_entry *)h->root.root.u.i.link;
2114 
2115 	  /* If the symbol is undefined, we can't do anything with it.  */
2116 	  if (h->root.root.type == bfd_link_hash_undefweak
2117 	      || h->root.root.type == bfd_link_hash_undefined)
2118 	    continue;
2119 
2120 	  /* If the symbol isn't defined in the current module, again
2121 	     we can't do anything.  */
2122 	  if (!(h->root.elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR))
2123 	    {
2124 	      /* Except for TLSGD relocs, which can sometimes be
2125 		 relaxed to GOTTPREL relocs.  */
2126 	      if (r_type != R_ALPHA_TLSGD)
2127 		continue;
2128 	      info.tsec = bfd_abs_section_ptr;
2129 	      symval = 0;
2130 	    }
2131 	  else
2132 	    {
2133 	      info.tsec = h->root.root.u.def.section;
2134 	      symval = h->root.root.u.def.value;
2135 	    }
2136 
2137 	  info.h = h;
2138 	  info.other = h->root.other;
2139 	  info.first_gotent = &h->got_entries;
2140 	}
2141 
2142       /* Search for the got entry to be used by this relocation.  */
2143       for (gotent = *info.first_gotent; gotent ; gotent = gotent->next)
2144 	if (gotent->gotobj == info.gotobj
2145 	    && gotent->reloc_type == r_type
2146 	    && gotent->addend == irel->r_addend)
2147 	  break;
2148       info.gotent = gotent;
2149 
2150       symval += info.tsec->output_section->vma + info.tsec->output_offset;
2151       symval += irel->r_addend;
2152 
2153       switch (r_type)
2154 	{
2155 	case R_ALPHA_LITERAL:
2156 	  BFD_ASSERT(info.gotent != NULL);
2157 
2158 	  /* If there exist LITUSE relocations immediately following, this
2159 	     opens up all sorts of interesting optimizations, because we
2160 	     now know every location that this address load is used.  */
2161 	  if (irel+1 < irelend
2162 	      && ELF64_R_TYPE (irel[1].r_info) == R_ALPHA_LITUSE)
2163 	    {
2164 	      if (!elf64_alpha_relax_with_lituse (&info, symval, irel))
2165 		goto error_return;
2166 	    }
2167 	  else
2168 	    {
2169 	      if (!elf64_alpha_relax_got_load (&info, symval, irel, r_type))
2170 		goto error_return;
2171 	    }
2172 	  break;
2173 
2174 	case R_ALPHA_GPRELHIGH:
2175 	case R_ALPHA_GPRELLOW:
2176 	  if (!elf64_alpha_relax_gprelhilo (&info, symval, irel,
2177 					    r_type == R_ALPHA_GPRELHIGH))
2178 	    goto error_return;
2179 	  break;
2180 
2181 	case R_ALPHA_GOTDTPREL:
2182 	case R_ALPHA_GOTTPREL:
2183 	  BFD_ASSERT(info.gotent != NULL);
2184 	  if (!elf64_alpha_relax_got_load (&info, symval, irel, r_type))
2185 	    goto error_return;
2186 	  break;
2187 
2188 	case R_ALPHA_TLSGD:
2189 	case R_ALPHA_TLSLDM:
2190 	  BFD_ASSERT(info.gotent != NULL);
2191 	  if (!elf64_alpha_relax_tls_get_addr (&info, symval, irel,
2192 					       r_type == R_ALPHA_TLSGD))
2193 	    goto error_return;
2194 	  break;
2195 	}
2196     }
2197 
2198   if (!elf64_alpha_size_plt_section (link_info))
2199     return FALSE;
2200   if (!elf64_alpha_size_got_sections (link_info))
2201     return FALSE;
2202   if (!elf64_alpha_size_rela_got_section (link_info))
2203     return FALSE;
2204 
2205   if (isymbuf != NULL
2206       && symtab_hdr->contents != (unsigned char *) isymbuf)
2207     {
2208       if (!link_info->keep_memory)
2209 	free (isymbuf);
2210       else
2211 	{
2212 	  /* Cache the symbols for elf_link_input_bfd.  */
2213 	  symtab_hdr->contents = (unsigned char *) isymbuf;
2214 	}
2215     }
2216 
2217   if (info.contents != NULL
2218       && elf_section_data (sec)->this_hdr.contents != info.contents)
2219     {
2220       if (!info.changed_contents && !link_info->keep_memory)
2221 	free (info.contents);
2222       else
2223 	{
2224 	  /* Cache the section contents for elf_link_input_bfd.  */
2225 	  elf_section_data (sec)->this_hdr.contents = info.contents;
2226 	}
2227     }
2228 
2229   if (elf_section_data (sec)->relocs != internal_relocs)
2230     {
2231       if (!info.changed_relocs)
2232 	free (internal_relocs);
2233       else
2234 	elf_section_data (sec)->relocs = internal_relocs;
2235     }
2236 
2237   *again = info.changed_contents || info.changed_relocs;
2238 
2239   return TRUE;
2240 
2241  error_return:
2242   if (isymbuf != NULL
2243       && symtab_hdr->contents != (unsigned char *) isymbuf)
2244     free (isymbuf);
2245   if (info.contents != NULL
2246       && elf_section_data (sec)->this_hdr.contents != info.contents)
2247     free (info.contents);
2248   if (internal_relocs != NULL
2249       && elf_section_data (sec)->relocs != internal_relocs)
2250     free (internal_relocs);
2251   return FALSE;
2252 }
2253 
2254 /* PLT/GOT Stuff */
2255 #define PLT_HEADER_SIZE 32
2256 #define PLT_HEADER_WORD1	(bfd_vma) 0xc3600000	/* br   $27,.+4     */
2257 #define PLT_HEADER_WORD2	(bfd_vma) 0xa77b000c	/* ldq  $27,12($27) */
2258 #define PLT_HEADER_WORD3	(bfd_vma) 0x47ff041f	/* nop              */
2259 #define PLT_HEADER_WORD4	(bfd_vma) 0x6b7b0000	/* jmp  $27,($27)   */
2260 
2261 #define PLT_ENTRY_SIZE 12
2262 #define PLT_ENTRY_WORD1		0xc3800000	/* br   $28, plt0   */
2263 #define PLT_ENTRY_WORD2		0
2264 #define PLT_ENTRY_WORD3		0
2265 
2266 #define MAX_GOT_SIZE		(64*1024)
2267 
2268 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so"
2269 
2270 /* Handle an Alpha specific section when reading an object file.  This
2271    is called when elfcode.h finds a section with an unknown type.
2272    FIXME: We need to handle the SHF_ALPHA_GPREL flag, but I'm not sure
2273    how to.  */
2274 
2275 static bfd_boolean
elf64_alpha_section_from_shdr(abfd,hdr,name)2276 elf64_alpha_section_from_shdr (abfd, hdr, name)
2277      bfd *abfd;
2278      Elf_Internal_Shdr *hdr;
2279      const char *name;
2280 {
2281   asection *newsect;
2282 
2283   /* There ought to be a place to keep ELF backend specific flags, but
2284      at the moment there isn't one.  We just keep track of the
2285      sections by their name, instead.  Fortunately, the ABI gives
2286      suggested names for all the MIPS specific sections, so we will
2287      probably get away with this.  */
2288   switch (hdr->sh_type)
2289     {
2290     case SHT_ALPHA_DEBUG:
2291       if (strcmp (name, ".mdebug") != 0)
2292 	return FALSE;
2293       break;
2294     default:
2295       return FALSE;
2296     }
2297 
2298   if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name))
2299     return FALSE;
2300   newsect = hdr->bfd_section;
2301 
2302   if (hdr->sh_type == SHT_ALPHA_DEBUG)
2303     {
2304       if (! bfd_set_section_flags (abfd, newsect,
2305 				   (bfd_get_section_flags (abfd, newsect)
2306 				    | SEC_DEBUGGING)))
2307 	return FALSE;
2308     }
2309 
2310   return TRUE;
2311 }
2312 
2313 /* Convert Alpha specific section flags to bfd internal section flags.  */
2314 
2315 static bfd_boolean
elf64_alpha_section_flags(flags,hdr)2316 elf64_alpha_section_flags (flags, hdr)
2317      flagword *flags;
2318      Elf_Internal_Shdr *hdr;
2319 {
2320   if (hdr->sh_flags & SHF_ALPHA_GPREL)
2321     *flags |= SEC_SMALL_DATA;
2322 
2323   return TRUE;
2324 }
2325 
2326 /* Set the correct type for an Alpha ELF section.  We do this by the
2327    section name, which is a hack, but ought to work.  */
2328 
2329 static bfd_boolean
elf64_alpha_fake_sections(abfd,hdr,sec)2330 elf64_alpha_fake_sections (abfd, hdr, sec)
2331      bfd *abfd;
2332      Elf_Internal_Shdr *hdr;
2333      asection *sec;
2334 {
2335   register const char *name;
2336 
2337   name = bfd_get_section_name (abfd, sec);
2338 
2339   if (strcmp (name, ".mdebug") == 0)
2340     {
2341       hdr->sh_type = SHT_ALPHA_DEBUG;
2342       /* In a shared object on Irix 5.3, the .mdebug section has an
2343          entsize of 0.  FIXME: Does this matter?  */
2344       if ((abfd->flags & DYNAMIC) != 0 )
2345 	hdr->sh_entsize = 0;
2346       else
2347 	hdr->sh_entsize = 1;
2348     }
2349   else if ((sec->flags & SEC_SMALL_DATA)
2350 	   || strcmp (name, ".sdata") == 0
2351 	   || strcmp (name, ".sbss") == 0
2352 	   || strcmp (name, ".lit4") == 0
2353 	   || strcmp (name, ".lit8") == 0)
2354     hdr->sh_flags |= SHF_ALPHA_GPREL;
2355 
2356   return TRUE;
2357 }
2358 
2359 /* Hook called by the linker routine which adds symbols from an object
2360    file.  We use it to put .comm items in .sbss, and not .bss.  */
2361 
2362 static bfd_boolean
elf64_alpha_add_symbol_hook(abfd,info,sym,namep,flagsp,secp,valp)2363 elf64_alpha_add_symbol_hook (abfd, info, sym, namep, flagsp, secp, valp)
2364      bfd *abfd;
2365      struct bfd_link_info *info;
2366      Elf_Internal_Sym *sym;
2367      const char **namep ATTRIBUTE_UNUSED;
2368      flagword *flagsp ATTRIBUTE_UNUSED;
2369      asection **secp;
2370      bfd_vma *valp;
2371 {
2372   if (sym->st_shndx == SHN_COMMON
2373       && !info->relocatable
2374       && sym->st_size <= elf_gp_size (abfd))
2375     {
2376       /* Common symbols less than or equal to -G nn bytes are
2377 	 automatically put into .sbss.  */
2378 
2379       asection *scomm = bfd_get_section_by_name (abfd, ".scommon");
2380 
2381       if (scomm == NULL)
2382 	{
2383 	  scomm = bfd_make_section (abfd, ".scommon");
2384 	  if (scomm == NULL
2385 	      || !bfd_set_section_flags (abfd, scomm, (SEC_ALLOC
2386 						       | SEC_IS_COMMON
2387 						       | SEC_LINKER_CREATED)))
2388 	    return FALSE;
2389 	}
2390 
2391       *secp = scomm;
2392       *valp = sym->st_size;
2393     }
2394 
2395   return TRUE;
2396 }
2397 
2398 /* Create the .got section.  */
2399 
2400 static bfd_boolean
elf64_alpha_create_got_section(abfd,info)2401 elf64_alpha_create_got_section(abfd, info)
2402      bfd *abfd;
2403      struct bfd_link_info *info ATTRIBUTE_UNUSED;
2404 {
2405   asection *s;
2406 
2407   if ((s = bfd_get_section_by_name (abfd, ".got")))
2408     {
2409       /* Check for a non-linker created .got?  */
2410       if (alpha_elf_tdata (abfd)->got == NULL)
2411 	alpha_elf_tdata (abfd)->got = s;
2412       return TRUE;
2413     }
2414 
2415   s = bfd_make_section (abfd, ".got");
2416   if (s == NULL
2417       || !bfd_set_section_flags (abfd, s, (SEC_ALLOC | SEC_LOAD
2418 					   | SEC_HAS_CONTENTS
2419 					   | SEC_IN_MEMORY
2420 					   | SEC_LINKER_CREATED))
2421       || !bfd_set_section_alignment (abfd, s, 3))
2422     return FALSE;
2423 
2424   alpha_elf_tdata (abfd)->got = s;
2425 
2426   return TRUE;
2427 }
2428 
2429 /* Create all the dynamic sections.  */
2430 
2431 static bfd_boolean
elf64_alpha_create_dynamic_sections(abfd,info)2432 elf64_alpha_create_dynamic_sections (abfd, info)
2433      bfd *abfd;
2434      struct bfd_link_info *info;
2435 {
2436   asection *s;
2437   struct elf_link_hash_entry *h;
2438   struct bfd_link_hash_entry *bh;
2439 
2440   /* We need to create .plt, .rela.plt, .got, and .rela.got sections.  */
2441 
2442   s = bfd_make_section (abfd, ".plt");
2443   if (s == NULL
2444       || ! bfd_set_section_flags (abfd, s, (SEC_ALLOC | SEC_LOAD
2445 					    | SEC_HAS_CONTENTS
2446 					    | SEC_IN_MEMORY
2447 					    | SEC_LINKER_CREATED
2448 					    | SEC_CODE))
2449       || ! bfd_set_section_alignment (abfd, s, 3))
2450     return FALSE;
2451 
2452   /* Define the symbol _PROCEDURE_LINKAGE_TABLE_ at the start of the
2453      .plt section.  */
2454   bh = NULL;
2455   if (! (_bfd_generic_link_add_one_symbol
2456 	 (info, abfd, "_PROCEDURE_LINKAGE_TABLE_", BSF_GLOBAL, s,
2457 	  (bfd_vma) 0, (const char *) NULL, FALSE,
2458 	  get_elf_backend_data (abfd)->collect, &bh)))
2459     return FALSE;
2460   h = (struct elf_link_hash_entry *) bh;
2461   h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR;
2462   h->type = STT_OBJECT;
2463 
2464   if (info->shared
2465       && ! bfd_elf_link_record_dynamic_symbol (info, h))
2466     return FALSE;
2467 
2468   s = bfd_make_section (abfd, ".rela.plt");
2469   if (s == NULL
2470       || !bfd_set_section_flags (abfd, s, (SEC_ALLOC | SEC_LOAD
2471 					   | SEC_HAS_CONTENTS
2472 					   | SEC_IN_MEMORY
2473 					   | SEC_LINKER_CREATED
2474 					   | SEC_READONLY))
2475       || ! bfd_set_section_alignment (abfd, s, 3))
2476     return FALSE;
2477 
2478   /* We may or may not have created a .got section for this object, but
2479      we definitely havn't done the rest of the work.  */
2480 
2481   if (!elf64_alpha_create_got_section (abfd, info))
2482     return FALSE;
2483 
2484   s = bfd_make_section(abfd, ".rela.got");
2485   if (s == NULL
2486       || !bfd_set_section_flags (abfd, s, (SEC_ALLOC | SEC_LOAD
2487 					   | SEC_HAS_CONTENTS
2488 					   | SEC_IN_MEMORY
2489 					   | SEC_LINKER_CREATED
2490 					   | SEC_READONLY))
2491       || !bfd_set_section_alignment (abfd, s, 3))
2492     return FALSE;
2493 
2494   /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the
2495      dynobj's .got section.  We don't do this in the linker script
2496      because we don't want to define the symbol if we are not creating
2497      a global offset table.  */
2498   bh = NULL;
2499   if (!(_bfd_generic_link_add_one_symbol
2500 	(info, abfd, "_GLOBAL_OFFSET_TABLE_", BSF_GLOBAL,
2501 	 alpha_elf_tdata(abfd)->got, (bfd_vma) 0, (const char *) NULL,
2502 	 FALSE, get_elf_backend_data (abfd)->collect, &bh)))
2503     return FALSE;
2504   h = (struct elf_link_hash_entry *) bh;
2505   h->elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR;
2506   h->type = STT_OBJECT;
2507 
2508   if (info->shared
2509       && ! bfd_elf_link_record_dynamic_symbol (info, h))
2510     return FALSE;
2511 
2512   elf_hash_table (info)->hgot = h;
2513 
2514   return TRUE;
2515 }
2516 
2517 /* Read ECOFF debugging information from a .mdebug section into a
2518    ecoff_debug_info structure.  */
2519 
2520 static bfd_boolean
elf64_alpha_read_ecoff_info(abfd,section,debug)2521 elf64_alpha_read_ecoff_info (abfd, section, debug)
2522      bfd *abfd;
2523      asection *section;
2524      struct ecoff_debug_info *debug;
2525 {
2526   HDRR *symhdr;
2527   const struct ecoff_debug_swap *swap;
2528   char *ext_hdr = NULL;
2529 
2530   swap = get_elf_backend_data (abfd)->elf_backend_ecoff_debug_swap;
2531   memset (debug, 0, sizeof (*debug));
2532 
2533   ext_hdr = (char *) bfd_malloc (swap->external_hdr_size);
2534   if (ext_hdr == NULL && swap->external_hdr_size != 0)
2535     goto error_return;
2536 
2537   if (! bfd_get_section_contents (abfd, section, ext_hdr, (file_ptr) 0,
2538 				  swap->external_hdr_size))
2539     goto error_return;
2540 
2541   symhdr = &debug->symbolic_header;
2542   (*swap->swap_hdr_in) (abfd, ext_hdr, symhdr);
2543 
2544   /* The symbolic header contains absolute file offsets and sizes to
2545      read.  */
2546 #define READ(ptr, offset, count, size, type)				\
2547   if (symhdr->count == 0)						\
2548     debug->ptr = NULL;							\
2549   else									\
2550     {									\
2551       bfd_size_type amt = (bfd_size_type) size * symhdr->count;		\
2552       debug->ptr = (type) bfd_malloc (amt);				\
2553       if (debug->ptr == NULL)						\
2554 	goto error_return;						\
2555       if (bfd_seek (abfd, (file_ptr) symhdr->offset, SEEK_SET) != 0	\
2556 	  || bfd_bread (debug->ptr, amt, abfd) != amt)			\
2557 	goto error_return;						\
2558     }
2559 
2560   READ (line, cbLineOffset, cbLine, sizeof (unsigned char), unsigned char *);
2561   READ (external_dnr, cbDnOffset, idnMax, swap->external_dnr_size, PTR);
2562   READ (external_pdr, cbPdOffset, ipdMax, swap->external_pdr_size, PTR);
2563   READ (external_sym, cbSymOffset, isymMax, swap->external_sym_size, PTR);
2564   READ (external_opt, cbOptOffset, ioptMax, swap->external_opt_size, PTR);
2565   READ (external_aux, cbAuxOffset, iauxMax, sizeof (union aux_ext),
2566 	union aux_ext *);
2567   READ (ss, cbSsOffset, issMax, sizeof (char), char *);
2568   READ (ssext, cbSsExtOffset, issExtMax, sizeof (char), char *);
2569   READ (external_fdr, cbFdOffset, ifdMax, swap->external_fdr_size, PTR);
2570   READ (external_rfd, cbRfdOffset, crfd, swap->external_rfd_size, PTR);
2571   READ (external_ext, cbExtOffset, iextMax, swap->external_ext_size, PTR);
2572 #undef READ
2573 
2574   debug->fdr = NULL;
2575   debug->adjust = NULL;
2576 
2577   return TRUE;
2578 
2579  error_return:
2580   if (ext_hdr != NULL)
2581     free (ext_hdr);
2582   if (debug->line != NULL)
2583     free (debug->line);
2584   if (debug->external_dnr != NULL)
2585     free (debug->external_dnr);
2586   if (debug->external_pdr != NULL)
2587     free (debug->external_pdr);
2588   if (debug->external_sym != NULL)
2589     free (debug->external_sym);
2590   if (debug->external_opt != NULL)
2591     free (debug->external_opt);
2592   if (debug->external_aux != NULL)
2593     free (debug->external_aux);
2594   if (debug->ss != NULL)
2595     free (debug->ss);
2596   if (debug->ssext != NULL)
2597     free (debug->ssext);
2598   if (debug->external_fdr != NULL)
2599     free (debug->external_fdr);
2600   if (debug->external_rfd != NULL)
2601     free (debug->external_rfd);
2602   if (debug->external_ext != NULL)
2603     free (debug->external_ext);
2604   return FALSE;
2605 }
2606 
2607 /* Alpha ELF local labels start with '$'.  */
2608 
2609 static bfd_boolean
elf64_alpha_is_local_label_name(abfd,name)2610 elf64_alpha_is_local_label_name (abfd, name)
2611      bfd *abfd ATTRIBUTE_UNUSED;
2612      const char *name;
2613 {
2614   return name[0] == '$';
2615 }
2616 
2617 /* Alpha ELF follows MIPS ELF in using a special find_nearest_line
2618    routine in order to handle the ECOFF debugging information.  We
2619    still call this mips_elf_find_line because of the slot
2620    find_line_info in elf_obj_tdata is declared that way.  */
2621 
2622 struct mips_elf_find_line
2623 {
2624   struct ecoff_debug_info d;
2625   struct ecoff_find_line i;
2626 };
2627 
2628 static bfd_boolean
elf64_alpha_find_nearest_line(abfd,section,symbols,offset,filename_ptr,functionname_ptr,line_ptr)2629 elf64_alpha_find_nearest_line (abfd, section, symbols, offset, filename_ptr,
2630 			       functionname_ptr, line_ptr)
2631      bfd *abfd;
2632      asection *section;
2633      asymbol **symbols;
2634      bfd_vma offset;
2635      const char **filename_ptr;
2636      const char **functionname_ptr;
2637      unsigned int *line_ptr;
2638 {
2639   asection *msec;
2640 
2641   if (_bfd_dwarf2_find_nearest_line (abfd, section, symbols, offset,
2642 				     filename_ptr, functionname_ptr,
2643 				     line_ptr, 0,
2644 				     &elf_tdata (abfd)->dwarf2_find_line_info))
2645     return TRUE;
2646 
2647   msec = bfd_get_section_by_name (abfd, ".mdebug");
2648   if (msec != NULL)
2649     {
2650       flagword origflags;
2651       struct mips_elf_find_line *fi;
2652       const struct ecoff_debug_swap * const swap =
2653 	get_elf_backend_data (abfd)->elf_backend_ecoff_debug_swap;
2654 
2655       /* If we are called during a link, alpha_elf_final_link may have
2656 	 cleared the SEC_HAS_CONTENTS field.  We force it back on here
2657 	 if appropriate (which it normally will be).  */
2658       origflags = msec->flags;
2659       if (elf_section_data (msec)->this_hdr.sh_type != SHT_NOBITS)
2660 	msec->flags |= SEC_HAS_CONTENTS;
2661 
2662       fi = elf_tdata (abfd)->find_line_info;
2663       if (fi == NULL)
2664 	{
2665 	  bfd_size_type external_fdr_size;
2666 	  char *fraw_src;
2667 	  char *fraw_end;
2668 	  struct fdr *fdr_ptr;
2669 	  bfd_size_type amt = sizeof (struct mips_elf_find_line);
2670 
2671 	  fi = (struct mips_elf_find_line *) bfd_zalloc (abfd, amt);
2672 	  if (fi == NULL)
2673 	    {
2674 	      msec->flags = origflags;
2675 	      return FALSE;
2676 	    }
2677 
2678 	  if (!elf64_alpha_read_ecoff_info (abfd, msec, &fi->d))
2679 	    {
2680 	      msec->flags = origflags;
2681 	      return FALSE;
2682 	    }
2683 
2684 	  /* Swap in the FDR information.  */
2685 	  amt = fi->d.symbolic_header.ifdMax * sizeof (struct fdr);
2686 	  fi->d.fdr = (struct fdr *) bfd_alloc (abfd, amt);
2687 	  if (fi->d.fdr == NULL)
2688 	    {
2689 	      msec->flags = origflags;
2690 	      return FALSE;
2691 	    }
2692 	  external_fdr_size = swap->external_fdr_size;
2693 	  fdr_ptr = fi->d.fdr;
2694 	  fraw_src = (char *) fi->d.external_fdr;
2695 	  fraw_end = (fraw_src
2696 		      + fi->d.symbolic_header.ifdMax * external_fdr_size);
2697 	  for (; fraw_src < fraw_end; fraw_src += external_fdr_size, fdr_ptr++)
2698 	    (*swap->swap_fdr_in) (abfd, (PTR) fraw_src, fdr_ptr);
2699 
2700 	  elf_tdata (abfd)->find_line_info = fi;
2701 
2702 	  /* Note that we don't bother to ever free this information.
2703              find_nearest_line is either called all the time, as in
2704              objdump -l, so the information should be saved, or it is
2705              rarely called, as in ld error messages, so the memory
2706              wasted is unimportant.  Still, it would probably be a
2707              good idea for free_cached_info to throw it away.  */
2708 	}
2709 
2710       if (_bfd_ecoff_locate_line (abfd, section, offset, &fi->d, swap,
2711 				  &fi->i, filename_ptr, functionname_ptr,
2712 				  line_ptr))
2713 	{
2714 	  msec->flags = origflags;
2715 	  return TRUE;
2716 	}
2717 
2718       msec->flags = origflags;
2719     }
2720 
2721   /* Fall back on the generic ELF find_nearest_line routine.  */
2722 
2723   return _bfd_elf_find_nearest_line (abfd, section, symbols, offset,
2724 				     filename_ptr, functionname_ptr,
2725 				     line_ptr);
2726 }
2727 
2728 /* Structure used to pass information to alpha_elf_output_extsym.  */
2729 
2730 struct extsym_info
2731 {
2732   bfd *abfd;
2733   struct bfd_link_info *info;
2734   struct ecoff_debug_info *debug;
2735   const struct ecoff_debug_swap *swap;
2736   bfd_boolean failed;
2737 };
2738 
2739 static bfd_boolean
elf64_alpha_output_extsym(h,data)2740 elf64_alpha_output_extsym (h, data)
2741      struct alpha_elf_link_hash_entry *h;
2742      PTR data;
2743 {
2744   struct extsym_info *einfo = (struct extsym_info *) data;
2745   bfd_boolean strip;
2746   asection *sec, *output_section;
2747 
2748   if (h->root.root.type == bfd_link_hash_warning)
2749     h = (struct alpha_elf_link_hash_entry *) h->root.root.u.i.link;
2750 
2751   if (h->root.indx == -2)
2752     strip = FALSE;
2753   else if (((h->root.elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
2754 	    || (h->root.elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) != 0)
2755 	   && (h->root.elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0
2756 	   && (h->root.elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR) == 0)
2757     strip = TRUE;
2758   else if (einfo->info->strip == strip_all
2759 	   || (einfo->info->strip == strip_some
2760 	       && bfd_hash_lookup (einfo->info->keep_hash,
2761 				   h->root.root.root.string,
2762 				   FALSE, FALSE) == NULL))
2763     strip = TRUE;
2764   else
2765     strip = FALSE;
2766 
2767   if (strip)
2768     return TRUE;
2769 
2770   if (h->esym.ifd == -2)
2771     {
2772       h->esym.jmptbl = 0;
2773       h->esym.cobol_main = 0;
2774       h->esym.weakext = 0;
2775       h->esym.reserved = 0;
2776       h->esym.ifd = ifdNil;
2777       h->esym.asym.value = 0;
2778       h->esym.asym.st = stGlobal;
2779 
2780       if (h->root.root.type != bfd_link_hash_defined
2781 	  && h->root.root.type != bfd_link_hash_defweak)
2782 	h->esym.asym.sc = scAbs;
2783       else
2784 	{
2785 	  const char *name;
2786 
2787 	  sec = h->root.root.u.def.section;
2788 	  output_section = sec->output_section;
2789 
2790 	  /* When making a shared library and symbol h is the one from
2791 	     the another shared library, OUTPUT_SECTION may be null.  */
2792 	  if (output_section == NULL)
2793 	    h->esym.asym.sc = scUndefined;
2794 	  else
2795 	    {
2796 	      name = bfd_section_name (output_section->owner, output_section);
2797 
2798 	      if (strcmp (name, ".text") == 0)
2799 		h->esym.asym.sc = scText;
2800 	      else if (strcmp (name, ".data") == 0)
2801 		h->esym.asym.sc = scData;
2802 	      else if (strcmp (name, ".sdata") == 0)
2803 		h->esym.asym.sc = scSData;
2804 	      else if (strcmp (name, ".rodata") == 0
2805 		       || strcmp (name, ".rdata") == 0)
2806 		h->esym.asym.sc = scRData;
2807 	      else if (strcmp (name, ".bss") == 0)
2808 		h->esym.asym.sc = scBss;
2809 	      else if (strcmp (name, ".sbss") == 0)
2810 		h->esym.asym.sc = scSBss;
2811 	      else if (strcmp (name, ".init") == 0)
2812 		h->esym.asym.sc = scInit;
2813 	      else if (strcmp (name, ".fini") == 0)
2814 		h->esym.asym.sc = scFini;
2815 	      else
2816 		h->esym.asym.sc = scAbs;
2817 	    }
2818 	}
2819 
2820       h->esym.asym.reserved = 0;
2821       h->esym.asym.index = indexNil;
2822     }
2823 
2824   if (h->root.root.type == bfd_link_hash_common)
2825     h->esym.asym.value = h->root.root.u.c.size;
2826   else if (h->root.root.type == bfd_link_hash_defined
2827 	   || h->root.root.type == bfd_link_hash_defweak)
2828     {
2829       if (h->esym.asym.sc == scCommon)
2830 	h->esym.asym.sc = scBss;
2831       else if (h->esym.asym.sc == scSCommon)
2832 	h->esym.asym.sc = scSBss;
2833 
2834       sec = h->root.root.u.def.section;
2835       output_section = sec->output_section;
2836       if (output_section != NULL)
2837 	h->esym.asym.value = (h->root.root.u.def.value
2838 			      + sec->output_offset
2839 			      + output_section->vma);
2840       else
2841 	h->esym.asym.value = 0;
2842     }
2843   else if ((h->root.elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0)
2844     {
2845       /* Set type and value for a symbol with a function stub.  */
2846       h->esym.asym.st = stProc;
2847       sec = bfd_get_section_by_name (einfo->abfd, ".plt");
2848       if (sec == NULL)
2849 	h->esym.asym.value = 0;
2850       else
2851 	{
2852 	  output_section = sec->output_section;
2853 	  if (output_section != NULL)
2854 	    h->esym.asym.value = (h->root.plt.offset
2855 				  + sec->output_offset
2856 				  + output_section->vma);
2857 	  else
2858 	    h->esym.asym.value = 0;
2859 	}
2860     }
2861 
2862   if (! bfd_ecoff_debug_one_external (einfo->abfd, einfo->debug, einfo->swap,
2863 				      h->root.root.root.string,
2864 				      &h->esym))
2865     {
2866       einfo->failed = TRUE;
2867       return FALSE;
2868     }
2869 
2870   return TRUE;
2871 }
2872 
2873 /* Search for and possibly create a got entry.  */
2874 
2875 static struct alpha_elf_got_entry *
get_got_entry(abfd,h,r_type,r_symndx,r_addend)2876 get_got_entry (abfd, h, r_type, r_symndx, r_addend)
2877      bfd *abfd;
2878      struct alpha_elf_link_hash_entry *h;
2879      unsigned long r_type, r_symndx;
2880      bfd_vma r_addend;
2881 {
2882   struct alpha_elf_got_entry *gotent;
2883   struct alpha_elf_got_entry **slot;
2884 
2885   if (h)
2886     slot = &h->got_entries;
2887   else
2888     {
2889       /* This is a local .got entry -- record for merge.  */
2890 
2891       struct alpha_elf_got_entry **local_got_entries;
2892 
2893       local_got_entries = alpha_elf_tdata(abfd)->local_got_entries;
2894       if (!local_got_entries)
2895 	{
2896 	  bfd_size_type size;
2897 	  Elf_Internal_Shdr *symtab_hdr;
2898 
2899 	  symtab_hdr = &elf_tdata(abfd)->symtab_hdr;
2900 	  size = symtab_hdr->sh_info;
2901 	  size *= sizeof (struct alpha_elf_got_entry *);
2902 
2903 	  local_got_entries
2904 	    = (struct alpha_elf_got_entry **) bfd_zalloc (abfd, size);
2905 	  if (!local_got_entries)
2906 	    return NULL;
2907 
2908 	  alpha_elf_tdata (abfd)->local_got_entries = local_got_entries;
2909 	}
2910 
2911       slot = &local_got_entries[r_symndx];
2912     }
2913 
2914   for (gotent = *slot; gotent ; gotent = gotent->next)
2915     if (gotent->gotobj == abfd
2916 	&& gotent->reloc_type == r_type
2917 	&& gotent->addend == r_addend)
2918       break;
2919 
2920   if (!gotent)
2921     {
2922       int entry_size;
2923       bfd_size_type amt;
2924 
2925       amt = sizeof (struct alpha_elf_got_entry);
2926       gotent = (struct alpha_elf_got_entry *) bfd_alloc (abfd, amt);
2927       if (!gotent)
2928 	return NULL;
2929 
2930       gotent->gotobj = abfd;
2931       gotent->addend = r_addend;
2932       gotent->got_offset = -1;
2933       gotent->use_count = 1;
2934       gotent->reloc_type = r_type;
2935       gotent->reloc_done = 0;
2936       gotent->reloc_xlated = 0;
2937 
2938       gotent->next = *slot;
2939       *slot = gotent;
2940 
2941       entry_size = alpha_got_entry_size (r_type);
2942       alpha_elf_tdata (abfd)->total_got_size += entry_size;
2943       if (!h)
2944 	alpha_elf_tdata(abfd)->local_got_size += entry_size;
2945     }
2946   else
2947     gotent->use_count += 1;
2948 
2949   return gotent;
2950 }
2951 
2952 /* Handle dynamic relocations when doing an Alpha ELF link.  */
2953 
2954 static bfd_boolean
elf64_alpha_check_relocs(abfd,info,sec,relocs)2955 elf64_alpha_check_relocs (abfd, info, sec, relocs)
2956      bfd *abfd;
2957      struct bfd_link_info *info;
2958      asection *sec;
2959      const Elf_Internal_Rela *relocs;
2960 {
2961   bfd *dynobj;
2962   asection *sreloc;
2963   const char *rel_sec_name;
2964   Elf_Internal_Shdr *symtab_hdr;
2965   struct alpha_elf_link_hash_entry **sym_hashes;
2966   const Elf_Internal_Rela *rel, *relend;
2967   bfd_boolean got_created;
2968   bfd_size_type amt;
2969 
2970   if (info->relocatable)
2971     return TRUE;
2972 
2973   dynobj = elf_hash_table(info)->dynobj;
2974   if (dynobj == NULL)
2975     elf_hash_table(info)->dynobj = dynobj = abfd;
2976 
2977   sreloc = NULL;
2978   rel_sec_name = NULL;
2979   symtab_hdr = &elf_tdata(abfd)->symtab_hdr;
2980   sym_hashes = alpha_elf_sym_hashes(abfd);
2981   got_created = FALSE;
2982 
2983   relend = relocs + sec->reloc_count;
2984   for (rel = relocs; rel < relend; ++rel)
2985     {
2986       enum {
2987 	NEED_GOT = 1,
2988 	NEED_GOT_ENTRY = 2,
2989 	NEED_DYNREL = 4
2990       };
2991 
2992       unsigned long r_symndx, r_type;
2993       struct alpha_elf_link_hash_entry *h;
2994       unsigned int gotent_flags;
2995       bfd_boolean maybe_dynamic;
2996       unsigned int need;
2997       bfd_vma addend;
2998 
2999       r_symndx = ELF64_R_SYM (rel->r_info);
3000       if (r_symndx < symtab_hdr->sh_info)
3001 	h = NULL;
3002       else
3003 	{
3004 	  h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3005 
3006 	  while (h->root.root.type == bfd_link_hash_indirect
3007 		 || h->root.root.type == bfd_link_hash_warning)
3008 	    h = (struct alpha_elf_link_hash_entry *)h->root.root.u.i.link;
3009 
3010 	  h->root.elf_link_hash_flags |= ELF_LINK_HASH_REF_REGULAR;
3011 	}
3012 
3013       /* We can only get preliminary data on whether a symbol is
3014          locally or externally defined, as not all of the input files
3015          have yet been processed.  Do something with what we know, as
3016          this may help reduce memory usage and processing time later.  */
3017       maybe_dynamic = FALSE;
3018       if (h && ((info->shared
3019 		 && (!info->symbolic || info->unresolved_syms_in_shared_libs == RM_IGNORE))
3020 		|| ! (h->root.elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR)
3021 		|| h->root.root.type == bfd_link_hash_defweak))
3022         maybe_dynamic = TRUE;
3023 
3024       need = 0;
3025       gotent_flags = 0;
3026       r_type = ELF64_R_TYPE (rel->r_info);
3027       addend = rel->r_addend;
3028 
3029       switch (r_type)
3030 	{
3031 	case R_ALPHA_LITERAL:
3032 	  need = NEED_GOT | NEED_GOT_ENTRY;
3033 
3034 	  /* Remember how this literal is used from its LITUSEs.
3035 	     This will be important when it comes to decide if we can
3036 	     create a .plt entry for a function symbol.  */
3037 	  while (++rel < relend && ELF64_R_TYPE (rel->r_info) == R_ALPHA_LITUSE)
3038 	    if (rel->r_addend >= 1 && rel->r_addend <= 5)
3039 	      gotent_flags |= 1 << rel->r_addend;
3040 	  --rel;
3041 
3042 	  /* No LITUSEs -- presumably the address is used somehow.  */
3043 	  if (gotent_flags == 0)
3044 	    gotent_flags = ALPHA_ELF_LINK_HASH_LU_ADDR;
3045 	  break;
3046 
3047 	case R_ALPHA_GPDISP:
3048 	case R_ALPHA_GPREL16:
3049 	case R_ALPHA_GPREL32:
3050 	case R_ALPHA_GPRELHIGH:
3051 	case R_ALPHA_GPRELLOW:
3052 	case R_ALPHA_BRSGP:
3053 	  need = NEED_GOT;
3054 	  break;
3055 
3056 	case R_ALPHA_REFLONG:
3057 	case R_ALPHA_REFQUAD:
3058 	  if ((info->shared && (sec->flags & SEC_ALLOC)) || maybe_dynamic)
3059 	    need = NEED_DYNREL;
3060 	  break;
3061 
3062 	case R_ALPHA_TLSLDM:
3063 	  /* The symbol for a TLSLDM reloc is ignored.  Collapse the
3064 	     reloc to the 0 symbol so that they all match.  */
3065 	  r_symndx = 0;
3066 	  h = 0;
3067 	  maybe_dynamic = FALSE;
3068 	  /* FALLTHRU */
3069 
3070 	case R_ALPHA_TLSGD:
3071 	case R_ALPHA_GOTDTPREL:
3072 	  need = NEED_GOT | NEED_GOT_ENTRY;
3073 	  break;
3074 
3075 	case R_ALPHA_GOTTPREL:
3076 	  need = NEED_GOT | NEED_GOT_ENTRY;
3077 	  gotent_flags = ALPHA_ELF_LINK_HASH_TLS_IE;
3078 	  if (info->shared)
3079 	    info->flags |= DF_STATIC_TLS;
3080 	  break;
3081 
3082 	case R_ALPHA_TPREL64:
3083 	  if (info->shared || maybe_dynamic)
3084 	    need = NEED_DYNREL;
3085 	  if (info->shared)
3086 	    info->flags |= DF_STATIC_TLS;
3087 	  break;
3088 	}
3089 
3090       if (need & NEED_GOT)
3091 	{
3092 	  if (!got_created)
3093 	    {
3094 	      if (!elf64_alpha_create_got_section (abfd, info))
3095 		return FALSE;
3096 
3097 	      /* Make sure the object's gotobj is set to itself so
3098 		 that we default to every object with its own .got.
3099 		 We'll merge .gots later once we've collected each
3100 		 object's info.  */
3101 	      alpha_elf_tdata(abfd)->gotobj = abfd;
3102 
3103 	      got_created = 1;
3104 	    }
3105 	}
3106 
3107       if (need & NEED_GOT_ENTRY)
3108 	{
3109 	  struct alpha_elf_got_entry *gotent;
3110 
3111 	  gotent = get_got_entry (abfd, h, r_type, r_symndx, addend);
3112 	  if (!gotent)
3113 	    return FALSE;
3114 
3115 	  if (gotent_flags)
3116 	    {
3117 	      gotent->flags |= gotent_flags;
3118 	      if (h)
3119 		{
3120 		  gotent_flags |= h->flags;
3121 		  h->flags = gotent_flags;
3122 
3123 		  /* Make a guess as to whether a .plt entry is needed.  */
3124 		  if ((gotent_flags & ALPHA_ELF_LINK_HASH_LU_FUNC)
3125 		      && !(gotent_flags & ~ALPHA_ELF_LINK_HASH_LU_FUNC))
3126 		    h->root.elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
3127 		  else
3128 		    h->root.elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
3129 	        }
3130 	    }
3131 	}
3132 
3133       if (need & NEED_DYNREL)
3134 	{
3135 	  if (rel_sec_name == NULL)
3136 	    {
3137 	      rel_sec_name = (bfd_elf_string_from_elf_section
3138 			      (abfd, elf_elfheader(abfd)->e_shstrndx,
3139 			       elf_section_data(sec)->rel_hdr.sh_name));
3140 	      if (rel_sec_name == NULL)
3141 		return FALSE;
3142 
3143 	      BFD_ASSERT (strncmp (rel_sec_name, ".rela", 5) == 0
3144 			  && strcmp (bfd_get_section_name (abfd, sec),
3145 				     rel_sec_name+5) == 0);
3146 	    }
3147 
3148 	  /* We need to create the section here now whether we eventually
3149 	     use it or not so that it gets mapped to an output section by
3150 	     the linker.  If not used, we'll kill it in
3151 	     size_dynamic_sections.  */
3152 	  if (sreloc == NULL)
3153 	    {
3154 	      sreloc = bfd_get_section_by_name (dynobj, rel_sec_name);
3155 	      if (sreloc == NULL)
3156 		{
3157 		  flagword flags;
3158 
3159 		  sreloc = bfd_make_section (dynobj, rel_sec_name);
3160 		  flags = (SEC_HAS_CONTENTS | SEC_IN_MEMORY
3161 			   | SEC_LINKER_CREATED | SEC_READONLY);
3162 		  if (sec->flags & SEC_ALLOC)
3163 		    flags |= SEC_ALLOC | SEC_LOAD;
3164 		  if (sreloc == NULL
3165 		      || !bfd_set_section_flags (dynobj, sreloc, flags)
3166 		      || !bfd_set_section_alignment (dynobj, sreloc, 3))
3167 		    return FALSE;
3168 		}
3169 	    }
3170 
3171 	  if (h)
3172 	    {
3173 	      /* Since we havn't seen all of the input symbols yet, we
3174 		 don't know whether we'll actually need a dynamic relocation
3175 		 entry for this reloc.  So make a record of it.  Once we
3176 		 find out if this thing needs dynamic relocation we'll
3177 		 expand the relocation sections by the appropriate amount.  */
3178 
3179 	      struct alpha_elf_reloc_entry *rent;
3180 
3181 	      for (rent = h->reloc_entries; rent; rent = rent->next)
3182 		if (rent->rtype == r_type && rent->srel == sreloc)
3183 		  break;
3184 
3185 	      if (!rent)
3186 		{
3187 		  amt = sizeof (struct alpha_elf_reloc_entry);
3188 		  rent = (struct alpha_elf_reloc_entry *) bfd_alloc (abfd, amt);
3189 		  if (!rent)
3190 		    return FALSE;
3191 
3192 		  rent->srel = sreloc;
3193 		  rent->rtype = r_type;
3194 		  rent->count = 1;
3195 		  rent->reltext = ((sec->flags & (SEC_READONLY | SEC_ALLOC))
3196 				   == (SEC_READONLY | SEC_ALLOC));
3197 
3198 		  rent->next = h->reloc_entries;
3199 		  h->reloc_entries = rent;
3200 		}
3201 	      else
3202 		rent->count++;
3203 	    }
3204 	  else if (info->shared)
3205 	    {
3206 	      /* If this is a shared library, and the section is to be
3207 		 loaded into memory, we need a RELATIVE reloc.  */
3208 	      sreloc->_raw_size += sizeof (Elf64_External_Rela);
3209 	      if ((sec->flags & (SEC_READONLY | SEC_ALLOC))
3210 		  == (SEC_READONLY | SEC_ALLOC))
3211 		info->flags |= DF_TEXTREL;
3212 	    }
3213 	}
3214     }
3215 
3216   return TRUE;
3217 }
3218 
3219 /* Adjust a symbol defined by a dynamic object and referenced by a
3220    regular object.  The current definition is in some section of the
3221    dynamic object, but we're not including those sections.  We have to
3222    change the definition to something the rest of the link can
3223    understand.  */
3224 
3225 static bfd_boolean
elf64_alpha_adjust_dynamic_symbol(info,h)3226 elf64_alpha_adjust_dynamic_symbol (info, h)
3227      struct bfd_link_info *info;
3228      struct elf_link_hash_entry *h;
3229 {
3230   bfd *dynobj;
3231   asection *s;
3232   struct alpha_elf_link_hash_entry *ah;
3233 
3234   dynobj = elf_hash_table(info)->dynobj;
3235   ah = (struct alpha_elf_link_hash_entry *)h;
3236 
3237   /* Now that we've seen all of the input symbols, finalize our decision
3238      about whether this symbol should get a .plt entry.  */
3239 
3240   if (alpha_elf_dynamic_symbol_p (h, info)
3241       && ((h->type == STT_FUNC
3242 	   && !(ah->flags & ALPHA_ELF_LINK_HASH_LU_ADDR))
3243 	  || (h->type == STT_NOTYPE
3244 	      && (ah->flags & ALPHA_ELF_LINK_HASH_LU_FUNC)
3245 	      && !(ah->flags & ~ALPHA_ELF_LINK_HASH_LU_FUNC)))
3246       /* Don't prevent otherwise valid programs from linking by attempting
3247 	 to create a new .got entry somewhere.  A Correct Solution would be
3248 	 to add a new .got section to a new object file and let it be merged
3249 	 somewhere later.  But for now don't bother.  */
3250       && ah->got_entries)
3251     {
3252       h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
3253 
3254       s = bfd_get_section_by_name(dynobj, ".plt");
3255       if (!s && !elf64_alpha_create_dynamic_sections (dynobj, info))
3256 	return FALSE;
3257 
3258       /* The first bit of the .plt is reserved.  */
3259       if (s->_raw_size == 0)
3260 	s->_raw_size = PLT_HEADER_SIZE;
3261 
3262       h->plt.offset = s->_raw_size;
3263       s->_raw_size += PLT_ENTRY_SIZE;
3264 
3265       /* If this symbol is not defined in a regular file, and we are not
3266 	 generating a shared library, then set the symbol to the location
3267 	 in the .plt.  This is required to make function pointers compare
3268 	 equal between the normal executable and the shared library.  */
3269       if (! info->shared
3270 	  && h->root.type != bfd_link_hash_defweak)
3271 	{
3272 	  ah->plt_old_section = h->root.u.def.section;
3273 	  ah->plt_old_value = h->root.u.def.value;
3274 	  ah->flags |= ALPHA_ELF_LINK_HASH_PLT_LOC;
3275 	  h->root.u.def.section = s;
3276 	  h->root.u.def.value = h->plt.offset;
3277 	}
3278 
3279       /* We also need a JMP_SLOT entry in the .rela.plt section.  */
3280       s = bfd_get_section_by_name (dynobj, ".rela.plt");
3281       BFD_ASSERT (s != NULL);
3282       s->_raw_size += sizeof (Elf64_External_Rela);
3283 
3284       return TRUE;
3285     }
3286   else
3287     h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
3288 
3289   /* If this is a weak symbol, and there is a real definition, the
3290      processor independent code will have arranged for us to see the
3291      real definition first, and we can just use the same value.  */
3292   if (h->weakdef != NULL)
3293     {
3294       BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined
3295 		  || h->weakdef->root.type == bfd_link_hash_defweak);
3296       h->root.u.def.section = h->weakdef->root.u.def.section;
3297       h->root.u.def.value = h->weakdef->root.u.def.value;
3298       return TRUE;
3299     }
3300 
3301   /* This is a reference to a symbol defined by a dynamic object which
3302      is not a function.  The Alpha, since it uses .got entries for all
3303      symbols even in regular objects, does not need the hackery of a
3304      .dynbss section and COPY dynamic relocations.  */
3305 
3306   return TRUE;
3307 }
3308 
3309 /* Symbol versioning can create new symbols, and make our old symbols
3310    indirect to the new ones.  Consolidate the got and reloc information
3311    in these situations.  */
3312 
3313 static bfd_boolean
elf64_alpha_merge_ind_symbols(hi,dummy)3314 elf64_alpha_merge_ind_symbols (hi, dummy)
3315      struct alpha_elf_link_hash_entry *hi;
3316      PTR dummy ATTRIBUTE_UNUSED;
3317 {
3318   struct alpha_elf_link_hash_entry *hs;
3319 
3320   if (hi->root.root.type != bfd_link_hash_indirect)
3321     return TRUE;
3322   hs = hi;
3323   do {
3324     hs = (struct alpha_elf_link_hash_entry *)hs->root.root.u.i.link;
3325   } while (hs->root.root.type == bfd_link_hash_indirect);
3326 
3327   /* Merge the flags.  Whee.  */
3328 
3329   hs->flags |= hi->flags;
3330 
3331   /* Merge the .got entries.  Cannibalize the old symbol's list in
3332      doing so, since we don't need it anymore.  */
3333 
3334   if (hs->got_entries == NULL)
3335     hs->got_entries = hi->got_entries;
3336   else
3337     {
3338       struct alpha_elf_got_entry *gi, *gs, *gin, *gsh;
3339 
3340       gsh = hs->got_entries;
3341       for (gi = hi->got_entries; gi ; gi = gin)
3342 	{
3343 	  gin = gi->next;
3344 	  for (gs = gsh; gs ; gs = gs->next)
3345 	    if (gi->gotobj == gs->gotobj
3346 		&& gi->reloc_type == gs->reloc_type
3347 		&& gi->addend == gs->addend)
3348 	      {
3349 		gi->use_count += gs->use_count;
3350 	        goto got_found;
3351 	      }
3352 	  gi->next = hs->got_entries;
3353 	  hs->got_entries = gi;
3354 	got_found:;
3355 	}
3356     }
3357   hi->got_entries = NULL;
3358 
3359   /* And similar for the reloc entries.  */
3360 
3361   if (hs->reloc_entries == NULL)
3362     hs->reloc_entries = hi->reloc_entries;
3363   else
3364     {
3365       struct alpha_elf_reloc_entry *ri, *rs, *rin, *rsh;
3366 
3367       rsh = hs->reloc_entries;
3368       for (ri = hi->reloc_entries; ri ; ri = rin)
3369 	{
3370 	  rin = ri->next;
3371 	  for (rs = rsh; rs ; rs = rs->next)
3372 	    if (ri->rtype == rs->rtype && ri->srel == rs->srel)
3373 	      {
3374 		rs->count += ri->count;
3375 		goto found_reloc;
3376 	      }
3377 	  ri->next = hs->reloc_entries;
3378 	  hs->reloc_entries = ri;
3379 	found_reloc:;
3380 	}
3381     }
3382   hi->reloc_entries = NULL;
3383 
3384   return TRUE;
3385 }
3386 
3387 /* Is it possible to merge two object file's .got tables?  */
3388 
3389 static bfd_boolean
elf64_alpha_can_merge_gots(a,b)3390 elf64_alpha_can_merge_gots (a, b)
3391      bfd *a, *b;
3392 {
3393   int total = alpha_elf_tdata (a)->total_got_size;
3394   bfd *bsub;
3395 
3396   /* Trivial quick fallout test.  */
3397   if (total + alpha_elf_tdata (b)->total_got_size <= MAX_GOT_SIZE)
3398     return TRUE;
3399 
3400   /* By their nature, local .got entries cannot be merged.  */
3401   if ((total += alpha_elf_tdata (b)->local_got_size) > MAX_GOT_SIZE)
3402     return FALSE;
3403 
3404   /* Failing the common trivial comparison, we must effectively
3405      perform the merge.  Not actually performing the merge means that
3406      we don't have to store undo information in case we fail.  */
3407   for (bsub = b; bsub ; bsub = alpha_elf_tdata (bsub)->in_got_link_next)
3408     {
3409       struct alpha_elf_link_hash_entry **hashes = alpha_elf_sym_hashes (bsub);
3410       Elf_Internal_Shdr *symtab_hdr = &elf_tdata (bsub)->symtab_hdr;
3411       int i, n;
3412 
3413       n = NUM_SHDR_ENTRIES (symtab_hdr) - symtab_hdr->sh_info;
3414       for (i = 0; i < n; ++i)
3415 	{
3416 	  struct alpha_elf_got_entry *ae, *be;
3417 	  struct alpha_elf_link_hash_entry *h;
3418 
3419 	  h = hashes[i];
3420 	  while (h->root.root.type == bfd_link_hash_indirect
3421 	         || h->root.root.type == bfd_link_hash_warning)
3422 	    h = (struct alpha_elf_link_hash_entry *)h->root.root.u.i.link;
3423 
3424 	  for (be = h->got_entries; be ; be = be->next)
3425 	    {
3426 	      if (be->use_count == 0)
3427 	        continue;
3428 	      if (be->gotobj != b)
3429 	        continue;
3430 
3431 	      for (ae = h->got_entries; ae ; ae = ae->next)
3432 	        if (ae->gotobj == a
3433 		    && ae->reloc_type == be->reloc_type
3434 		    && ae->addend == be->addend)
3435 		  goto global_found;
3436 
3437 	      total += alpha_got_entry_size (be->reloc_type);
3438 	      if (total > MAX_GOT_SIZE)
3439 	        return FALSE;
3440 	    global_found:;
3441 	    }
3442 	}
3443     }
3444 
3445   return TRUE;
3446 }
3447 
3448 /* Actually merge two .got tables.  */
3449 
3450 static void
elf64_alpha_merge_gots(a,b)3451 elf64_alpha_merge_gots (a, b)
3452      bfd *a, *b;
3453 {
3454   int total = alpha_elf_tdata (a)->total_got_size;
3455   bfd *bsub;
3456 
3457   /* Remember local expansion.  */
3458   {
3459     int e = alpha_elf_tdata (b)->local_got_size;
3460     total += e;
3461     alpha_elf_tdata (a)->local_got_size += e;
3462   }
3463 
3464   for (bsub = b; bsub ; bsub = alpha_elf_tdata (bsub)->in_got_link_next)
3465     {
3466       struct alpha_elf_got_entry **local_got_entries;
3467       struct alpha_elf_link_hash_entry **hashes;
3468       Elf_Internal_Shdr *symtab_hdr;
3469       int i, n;
3470 
3471       /* Let the local .got entries know they are part of a new subsegment.  */
3472       local_got_entries = alpha_elf_tdata (bsub)->local_got_entries;
3473       if (local_got_entries)
3474         {
3475 	  n = elf_tdata (bsub)->symtab_hdr.sh_info;
3476 	  for (i = 0; i < n; ++i)
3477 	    {
3478 	      struct alpha_elf_got_entry *ent;
3479 	      for (ent = local_got_entries[i]; ent; ent = ent->next)
3480 	        ent->gotobj = a;
3481 	    }
3482         }
3483 
3484       /* Merge the global .got entries.  */
3485       hashes = alpha_elf_sym_hashes (bsub);
3486       symtab_hdr = &elf_tdata (bsub)->symtab_hdr;
3487 
3488       n = NUM_SHDR_ENTRIES (symtab_hdr) - symtab_hdr->sh_info;
3489       for (i = 0; i < n; ++i)
3490         {
3491 	  struct alpha_elf_got_entry *ae, *be, **pbe, **start;
3492 	  struct alpha_elf_link_hash_entry *h;
3493 
3494 	  h = hashes[i];
3495 	  while (h->root.root.type == bfd_link_hash_indirect
3496 	         || h->root.root.type == bfd_link_hash_warning)
3497 	    h = (struct alpha_elf_link_hash_entry *)h->root.root.u.i.link;
3498 
3499 	  start = &h->got_entries;
3500 	  for (pbe = start, be = *start; be ; pbe = &be->next, be = be->next)
3501 	    {
3502 	      if (be->use_count == 0)
3503 	        {
3504 		  *pbe = be->next;
3505 		  continue;
3506 	        }
3507 	      if (be->gotobj != b)
3508 	        continue;
3509 
3510 	      for (ae = *start; ae ; ae = ae->next)
3511 	        if (ae->gotobj == a
3512 		    && ae->reloc_type == be->reloc_type
3513 		    && ae->addend == be->addend)
3514 		  {
3515 		    ae->flags |= be->flags;
3516 		    ae->use_count += be->use_count;
3517 		    *pbe = be->next;
3518 		    goto global_found;
3519 		  }
3520 	      be->gotobj = a;
3521 	      total += alpha_got_entry_size (be->reloc_type);
3522 
3523 	    global_found:;
3524 	    }
3525         }
3526 
3527       alpha_elf_tdata (bsub)->gotobj = a;
3528     }
3529   alpha_elf_tdata (a)->total_got_size = total;
3530 
3531   /* Merge the two in_got chains.  */
3532   {
3533     bfd *next;
3534 
3535     bsub = a;
3536     while ((next = alpha_elf_tdata (bsub)->in_got_link_next) != NULL)
3537       bsub = next;
3538 
3539     alpha_elf_tdata (bsub)->in_got_link_next = b;
3540   }
3541 }
3542 
3543 /* Calculate the offsets for the got entries.  */
3544 
3545 static bfd_boolean
elf64_alpha_calc_got_offsets_for_symbol(h,arg)3546 elf64_alpha_calc_got_offsets_for_symbol (h, arg)
3547      struct alpha_elf_link_hash_entry *h;
3548      PTR arg ATTRIBUTE_UNUSED;
3549 {
3550   bfd_boolean result = TRUE;
3551   struct alpha_elf_got_entry *gotent;
3552 
3553   if (h->root.root.type == bfd_link_hash_warning)
3554     h = (struct alpha_elf_link_hash_entry *) h->root.root.u.i.link;
3555 
3556   for (gotent = h->got_entries; gotent; gotent = gotent->next)
3557     if (gotent->use_count > 0)
3558       {
3559 	struct alpha_elf_obj_tdata *td;
3560 	bfd_size_type *plge;
3561 
3562 	td = alpha_elf_tdata (gotent->gotobj);
3563 	if (td == NULL)
3564 	  {
3565 	    _bfd_error_handler (_("Symbol %s has no GOT subsection for offset 0x%x"),
3566 				h->root.root.root.string, gotent->got_offset);
3567 	    result = FALSE;
3568 	    continue;
3569 	  }
3570 	plge = &td->got->_raw_size;
3571 	gotent->got_offset = *plge;
3572 	*plge += alpha_got_entry_size (gotent->reloc_type);
3573       }
3574 
3575   return result;
3576 }
3577 
3578 static void
elf64_alpha_calc_got_offsets(info)3579 elf64_alpha_calc_got_offsets (info)
3580      struct bfd_link_info *info;
3581 {
3582   bfd *i, *got_list = alpha_elf_hash_table(info)->got_list;
3583 
3584   /* First, zero out the .got sizes, as we may be recalculating the
3585      .got after optimizing it.  */
3586   for (i = got_list; i ; i = alpha_elf_tdata(i)->got_link_next)
3587     alpha_elf_tdata(i)->got->_raw_size = 0;
3588 
3589   /* Next, fill in the offsets for all the global entries.  */
3590   alpha_elf_link_hash_traverse (alpha_elf_hash_table (info),
3591 				elf64_alpha_calc_got_offsets_for_symbol,
3592 				NULL);
3593 
3594   /* Finally, fill in the offsets for the local entries.  */
3595   for (i = got_list; i ; i = alpha_elf_tdata(i)->got_link_next)
3596     {
3597       bfd_size_type got_offset = alpha_elf_tdata(i)->got->_raw_size;
3598       bfd *j;
3599 
3600       for (j = i; j ; j = alpha_elf_tdata(j)->in_got_link_next)
3601 	{
3602 	  struct alpha_elf_got_entry **local_got_entries, *gotent;
3603 	  int k, n;
3604 
3605 	  local_got_entries = alpha_elf_tdata(j)->local_got_entries;
3606 	  if (!local_got_entries)
3607 	    continue;
3608 
3609 	  for (k = 0, n = elf_tdata(j)->symtab_hdr.sh_info; k < n; ++k)
3610 	    for (gotent = local_got_entries[k]; gotent; gotent = gotent->next)
3611 	      if (gotent->use_count > 0)
3612 	        {
3613 		  gotent->got_offset = got_offset;
3614 		  got_offset += alpha_got_entry_size (gotent->reloc_type);
3615 	        }
3616 	}
3617 
3618       alpha_elf_tdata(i)->got->_raw_size = got_offset;
3619       alpha_elf_tdata(i)->got->_cooked_size = got_offset;
3620     }
3621 }
3622 
3623 /* Constructs the gots.  */
3624 
3625 static bfd_boolean
elf64_alpha_size_got_sections(info)3626 elf64_alpha_size_got_sections (info)
3627      struct bfd_link_info *info;
3628 {
3629   bfd *i, *got_list, *cur_got_obj = NULL;
3630   int something_changed = 0;
3631 
3632   got_list = alpha_elf_hash_table (info)->got_list;
3633 
3634   /* On the first time through, pretend we have an existing got list
3635      consisting of all of the input files.  */
3636   if (got_list == NULL)
3637     {
3638       for (i = info->input_bfds; i ; i = i->link_next)
3639 	{
3640 	  bfd *this_got = alpha_elf_tdata (i)->gotobj;
3641 	  if (this_got == NULL)
3642 	    continue;
3643 
3644 	  /* We are assuming no merging has yet occurred.  */
3645 	  BFD_ASSERT (this_got == i);
3646 
3647           if (alpha_elf_tdata (this_got)->total_got_size > MAX_GOT_SIZE)
3648 	    {
3649 	      /* Yikes! A single object file has too many entries.  */
3650 	      (*_bfd_error_handler)
3651 	        (_("%s: .got subsegment exceeds 64K (size %d)"),
3652 	         bfd_archive_filename (i),
3653 	         alpha_elf_tdata (this_got)->total_got_size);
3654 	      return FALSE;
3655 	    }
3656 
3657 	  if (got_list == NULL)
3658 	    got_list = this_got;
3659 	  else
3660 	    alpha_elf_tdata(cur_got_obj)->got_link_next = this_got;
3661 	  cur_got_obj = this_got;
3662 	}
3663 
3664       /* Strange degenerate case of no got references.  */
3665       if (got_list == NULL)
3666 	return TRUE;
3667 
3668       alpha_elf_hash_table (info)->got_list = got_list;
3669 
3670       /* Force got offsets to be recalculated.  */
3671       something_changed = 1;
3672     }
3673 
3674   cur_got_obj = got_list;
3675   i = alpha_elf_tdata(cur_got_obj)->got_link_next;
3676   while (i != NULL)
3677     {
3678       if (elf64_alpha_can_merge_gots (cur_got_obj, i))
3679 	{
3680 	  elf64_alpha_merge_gots (cur_got_obj, i);
3681 	  i = alpha_elf_tdata(i)->got_link_next;
3682 	  alpha_elf_tdata(cur_got_obj)->got_link_next = i;
3683 	  something_changed = 1;
3684 	}
3685       else
3686 	{
3687 	  cur_got_obj = i;
3688 	  i = alpha_elf_tdata(i)->got_link_next;
3689 	}
3690     }
3691 
3692   /* Once the gots have been merged, fill in the got offsets for
3693      everything therein.  */
3694   if (1 || something_changed)
3695     elf64_alpha_calc_got_offsets (info);
3696 
3697   return TRUE;
3698 }
3699 
3700 /* Called from relax_section to rebuild the PLT in light of
3701    potential changes in the function's status.  */
3702 
3703 static bfd_boolean
elf64_alpha_size_plt_section(info)3704 elf64_alpha_size_plt_section (info)
3705      struct bfd_link_info *info;
3706 {
3707   asection *splt, *spltrel;
3708   unsigned long entries;
3709   bfd *dynobj;
3710 
3711   dynobj = elf_hash_table(info)->dynobj;
3712   splt = bfd_get_section_by_name(dynobj, ".plt");
3713   if (splt == NULL)
3714     return TRUE;
3715 
3716   splt->_raw_size = 0;
3717 
3718   alpha_elf_link_hash_traverse (alpha_elf_hash_table (info),
3719 				elf64_alpha_size_plt_section_1, splt);
3720 
3721   splt->_cooked_size = splt->_raw_size;
3722 
3723   /* Every plt entry requires a JMP_SLOT relocation.  */
3724   spltrel = bfd_get_section_by_name (dynobj, ".rela.plt");
3725   if (splt->_raw_size)
3726     entries = (splt->_raw_size - PLT_HEADER_SIZE) / PLT_ENTRY_SIZE;
3727   else
3728     entries = 0;
3729   spltrel->_raw_size = entries * sizeof (Elf64_External_Rela);
3730   spltrel->_cooked_size = spltrel->_raw_size;
3731 
3732   return TRUE;
3733 }
3734 
3735 static bfd_boolean
elf64_alpha_size_plt_section_1(h,data)3736 elf64_alpha_size_plt_section_1 (h, data)
3737      struct alpha_elf_link_hash_entry *h;
3738      PTR data;
3739 {
3740   asection *splt = (asection *) data;
3741   struct alpha_elf_got_entry *gotent;
3742 
3743   /* If we didn't need an entry before, we still don't.  */
3744   if (!(h->root.elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT))
3745     return TRUE;
3746 
3747   /* There must still be a LITERAL got entry for the function.  */
3748   for (gotent = h->got_entries; gotent ; gotent = gotent->next)
3749     if (gotent->reloc_type == R_ALPHA_LITERAL
3750 	&& gotent->use_count > 0)
3751       break;
3752 
3753   /* If there is, reset the PLT offset.  If not, there's no longer
3754      a need for the PLT entry.  */
3755   if (gotent)
3756     {
3757       if (splt->_raw_size == 0)
3758 	splt->_raw_size = PLT_HEADER_SIZE;
3759       h->root.plt.offset = splt->_raw_size;
3760       splt->_raw_size += PLT_ENTRY_SIZE;
3761     }
3762   else
3763     {
3764       h->root.elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
3765       h->root.plt.offset = -1;
3766 
3767       /* Undo the definition frobbing begun in adjust_dynamic_symbol.  */
3768       if (h->flags & ALPHA_ELF_LINK_HASH_PLT_LOC)
3769 	{
3770 	  h->root.root.u.def.section = h->plt_old_section;
3771 	  h->root.root.u.def.value = h->plt_old_value;
3772 	  h->flags &= ~ALPHA_ELF_LINK_HASH_PLT_LOC;
3773 	}
3774     }
3775 
3776   return TRUE;
3777 }
3778 
3779 static bfd_boolean
elf64_alpha_always_size_sections(output_bfd,info)3780 elf64_alpha_always_size_sections (output_bfd, info)
3781      bfd *output_bfd ATTRIBUTE_UNUSED;
3782      struct bfd_link_info *info;
3783 {
3784   bfd *i;
3785 
3786   if (info->relocatable)
3787     return TRUE;
3788 
3789   /* First, take care of the indirect symbols created by versioning.  */
3790   alpha_elf_link_hash_traverse (alpha_elf_hash_table (info),
3791 				elf64_alpha_merge_ind_symbols,
3792 				NULL);
3793 
3794   if (!elf64_alpha_size_got_sections (info))
3795     return FALSE;
3796 
3797   /* Allocate space for all of the .got subsections.  */
3798   i = alpha_elf_hash_table (info)->got_list;
3799   for ( ; i ; i = alpha_elf_tdata(i)->got_link_next)
3800     {
3801       asection *s = alpha_elf_tdata(i)->got;
3802       if (s->_raw_size > 0)
3803 	{
3804 	  s->contents = (bfd_byte *) bfd_zalloc (i, s->_raw_size);
3805 	  if (s->contents == NULL)
3806 	    return FALSE;
3807 	}
3808     }
3809 
3810   return TRUE;
3811 }
3812 
3813 /* The number of dynamic relocations required by a static relocation.  */
3814 
3815 static int
alpha_dynamic_entries_for_reloc(r_type,dynamic,shared)3816 alpha_dynamic_entries_for_reloc (r_type, dynamic, shared)
3817      int r_type, dynamic, shared;
3818 {
3819   switch (r_type)
3820     {
3821     /* May appear in GOT entries.  */
3822     case R_ALPHA_TLSGD:
3823       return (dynamic ? 2 : shared ? 1 : 0);
3824     case R_ALPHA_TLSLDM:
3825       return shared;
3826     case R_ALPHA_LITERAL:
3827     case R_ALPHA_GOTTPREL:
3828       return dynamic || shared;
3829     case R_ALPHA_GOTDTPREL:
3830       return dynamic;
3831 
3832     /* May appear in data sections.  */
3833     case R_ALPHA_REFLONG:
3834     case R_ALPHA_REFQUAD:
3835     case R_ALPHA_TPREL64:
3836       return dynamic || shared;
3837 
3838     /* Everything else is illegal.  We'll issue an error during
3839        relocate_section.  */
3840     default:
3841       return 0;
3842     }
3843 }
3844 
3845 /* Work out the sizes of the dynamic relocation entries.  */
3846 
3847 static bfd_boolean
elf64_alpha_calc_dynrel_sizes(h,info)3848 elf64_alpha_calc_dynrel_sizes (h, info)
3849      struct alpha_elf_link_hash_entry *h;
3850      struct bfd_link_info *info;
3851 {
3852   bfd_boolean dynamic;
3853   struct alpha_elf_reloc_entry *relent;
3854   unsigned long entries;
3855 
3856   if (h->root.root.type == bfd_link_hash_warning)
3857     h = (struct alpha_elf_link_hash_entry *) h->root.root.u.i.link;
3858 
3859   /* If the symbol was defined as a common symbol in a regular object
3860      file, and there was no definition in any dynamic object, then the
3861      linker will have allocated space for the symbol in a common
3862      section but the ELF_LINK_HASH_DEF_REGULAR flag will not have been
3863      set.  This is done for dynamic symbols in
3864      elf_adjust_dynamic_symbol but this is not done for non-dynamic
3865      symbols, somehow.  */
3866   if (((h->root.elf_link_hash_flags
3867        & (ELF_LINK_HASH_DEF_REGULAR
3868 	  | ELF_LINK_HASH_REF_REGULAR
3869 	  | ELF_LINK_HASH_DEF_DYNAMIC))
3870        == ELF_LINK_HASH_REF_REGULAR)
3871       && (h->root.root.type == bfd_link_hash_defined
3872 	  || h->root.root.type == bfd_link_hash_defweak)
3873       && !(h->root.root.u.def.section->owner->flags & DYNAMIC))
3874     h->root.elf_link_hash_flags |= ELF_LINK_HASH_DEF_REGULAR;
3875 
3876   /* If the symbol is dynamic, we'll need all the relocations in their
3877      natural form.  If this is a shared object, and it has been forced
3878      local, we'll need the same number of RELATIVE relocations.  */
3879 
3880   dynamic = alpha_elf_dynamic_symbol_p (&h->root, info);
3881 
3882   for (relent = h->reloc_entries; relent; relent = relent->next)
3883     {
3884       entries = alpha_dynamic_entries_for_reloc (relent->rtype, dynamic,
3885 						 info->shared);
3886       if (entries)
3887 	{
3888 	  relent->srel->_raw_size +=
3889 	    entries * sizeof (Elf64_External_Rela) * relent->count;
3890 	  if (relent->reltext)
3891 	    info->flags |= DT_TEXTREL;
3892 	}
3893     }
3894 
3895   return TRUE;
3896 }
3897 
3898 /* Set the sizes of the dynamic relocation sections.  */
3899 
3900 static bfd_boolean
elf64_alpha_size_rela_got_section(info)3901 elf64_alpha_size_rela_got_section (info)
3902      struct bfd_link_info *info;
3903 {
3904   unsigned long entries;
3905   bfd *i, *dynobj;
3906   asection *srel;
3907 
3908   /* Shared libraries often require RELATIVE relocs, and some relocs
3909      require attention for the main application as well.  */
3910 
3911   entries = 0;
3912   for (i = alpha_elf_hash_table(info)->got_list;
3913        i ; i = alpha_elf_tdata(i)->got_link_next)
3914     {
3915       bfd *j;
3916 
3917       for (j = i; j ; j = alpha_elf_tdata(j)->in_got_link_next)
3918 	{
3919 	  struct alpha_elf_got_entry **local_got_entries, *gotent;
3920 	  int k, n;
3921 
3922 	  local_got_entries = alpha_elf_tdata(j)->local_got_entries;
3923 	  if (!local_got_entries)
3924 	    continue;
3925 
3926 	  for (k = 0, n = elf_tdata(j)->symtab_hdr.sh_info; k < n; ++k)
3927 	    for (gotent = local_got_entries[k];
3928 		 gotent ; gotent = gotent->next)
3929 	      if (gotent->use_count > 0)
3930 		entries += (alpha_dynamic_entries_for_reloc
3931 			    (gotent->reloc_type, 0, info->shared));
3932 	}
3933     }
3934 
3935   dynobj = elf_hash_table(info)->dynobj;
3936   srel = bfd_get_section_by_name (dynobj, ".rela.got");
3937   if (!srel)
3938     {
3939       BFD_ASSERT (entries == 0);
3940       return TRUE;
3941     }
3942   srel->_raw_size = sizeof (Elf64_External_Rela) * entries;
3943 
3944   /* Now do the non-local symbols.  */
3945   alpha_elf_link_hash_traverse (alpha_elf_hash_table (info),
3946 				elf64_alpha_size_rela_got_1, info);
3947 
3948   srel->_cooked_size = srel->_raw_size;
3949 
3950   return TRUE;
3951 }
3952 
3953 /* Subroutine of elf64_alpha_size_rela_got_section for doing the
3954    global symbols.  */
3955 
3956 static bfd_boolean
elf64_alpha_size_rela_got_1(h,info)3957 elf64_alpha_size_rela_got_1 (h, info)
3958      struct alpha_elf_link_hash_entry *h;
3959      struct bfd_link_info *info;
3960 {
3961   bfd_boolean dynamic;
3962   struct alpha_elf_got_entry *gotent;
3963   unsigned long entries;
3964 
3965   if (h->root.root.type == bfd_link_hash_warning)
3966     h = (struct alpha_elf_link_hash_entry *) h->root.root.u.i.link;
3967 
3968   /* If the symbol is dynamic, we'll need all the relocations in their
3969      natural form.  If this is a shared object, and it has been forced
3970      local, we'll need the same number of RELATIVE relocations.  */
3971 
3972   dynamic = alpha_elf_dynamic_symbol_p (&h->root, info);
3973 
3974   entries = 0;
3975   for (gotent = h->got_entries; gotent ; gotent = gotent->next)
3976     if (gotent->use_count > 0)
3977       entries += alpha_dynamic_entries_for_reloc (gotent->reloc_type,
3978 						  dynamic, info->shared);
3979 
3980   /* If we are using a .plt entry, subtract one, as the first
3981      reference uses a .rela.plt entry instead.  */
3982   if (h->root.plt.offset != MINUS_ONE)
3983     entries--;
3984 
3985   if (entries > 0)
3986     {
3987       bfd *dynobj = elf_hash_table(info)->dynobj;
3988       asection *srel = bfd_get_section_by_name (dynobj, ".rela.got");
3989       BFD_ASSERT (srel != NULL);
3990       srel->_raw_size += sizeof (Elf64_External_Rela) * entries;
3991     }
3992 
3993   return TRUE;
3994 }
3995 
3996 /* Set the sizes of the dynamic sections.  */
3997 
3998 static bfd_boolean
elf64_alpha_size_dynamic_sections(output_bfd,info)3999 elf64_alpha_size_dynamic_sections (output_bfd, info)
4000      bfd *output_bfd ATTRIBUTE_UNUSED;
4001      struct bfd_link_info *info;
4002 {
4003   bfd *dynobj;
4004   asection *s;
4005   bfd_boolean relplt;
4006 
4007   dynobj = elf_hash_table(info)->dynobj;
4008   BFD_ASSERT(dynobj != NULL);
4009 
4010   if (elf_hash_table (info)->dynamic_sections_created)
4011     {
4012       /* Set the contents of the .interp section to the interpreter.  */
4013       if (info->executable)
4014 	{
4015 	  s = bfd_get_section_by_name (dynobj, ".interp");
4016 	  BFD_ASSERT (s != NULL);
4017 	  s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER;
4018 	  s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
4019 	}
4020 
4021       /* Now that we've seen all of the input files, we can decide which
4022 	 symbols need dynamic relocation entries and which don't.  We've
4023 	 collected information in check_relocs that we can now apply to
4024 	 size the dynamic relocation sections.  */
4025       alpha_elf_link_hash_traverse (alpha_elf_hash_table (info),
4026 				    elf64_alpha_calc_dynrel_sizes, info);
4027 
4028       elf64_alpha_size_rela_got_section (info);
4029     }
4030   /* else we're not dynamic and by definition we don't need such things.  */
4031 
4032   /* The check_relocs and adjust_dynamic_symbol entry points have
4033      determined the sizes of the various dynamic sections.  Allocate
4034      memory for them.  */
4035   relplt = FALSE;
4036   for (s = dynobj->sections; s != NULL; s = s->next)
4037     {
4038       const char *name;
4039       bfd_boolean strip;
4040 
4041       if (!(s->flags & SEC_LINKER_CREATED))
4042 	continue;
4043 
4044       /* It's OK to base decisions on the section name, because none
4045 	 of the dynobj section names depend upon the input files.  */
4046       name = bfd_get_section_name (dynobj, s);
4047 
4048       /* If we don't need this section, strip it from the output file.
4049 	 This is to handle .rela.bss and .rela.plt.  We must create it
4050 	 in create_dynamic_sections, because it must be created before
4051 	 the linker maps input sections to output sections.  The
4052 	 linker does that before adjust_dynamic_symbol is called, and
4053 	 it is that function which decides whether anything needs to
4054 	 go into these sections.  */
4055 
4056       strip = FALSE;
4057 
4058       if (strncmp (name, ".rela", 5) == 0)
4059 	{
4060 	  strip = (s->_raw_size == 0);
4061 
4062 	  if (!strip)
4063 	    {
4064 	      if (strcmp(name, ".rela.plt") == 0)
4065 		relplt = TRUE;
4066 
4067 	      /* We use the reloc_count field as a counter if we need
4068 		 to copy relocs into the output file.  */
4069 	      s->reloc_count = 0;
4070 	    }
4071 	}
4072       else if (strcmp (name, ".plt") != 0)
4073 	{
4074 	  /* It's not one of our dynamic sections, so don't allocate space.  */
4075 	  continue;
4076 	}
4077 
4078       if (strip)
4079 	_bfd_strip_section_from_output (info, s);
4080       else
4081 	{
4082 	  /* Allocate memory for the section contents.  */
4083 	  s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->_raw_size);
4084 	  if (s->contents == NULL && s->_raw_size != 0)
4085 	    return FALSE;
4086 	}
4087     }
4088 
4089   if (elf_hash_table (info)->dynamic_sections_created)
4090     {
4091       /* Add some entries to the .dynamic section.  We fill in the
4092 	 values later, in elf64_alpha_finish_dynamic_sections, but we
4093 	 must add the entries now so that we get the correct size for
4094 	 the .dynamic section.  The DT_DEBUG entry is filled in by the
4095 	 dynamic linker and used by the debugger.  */
4096 #define add_dynamic_entry(TAG, VAL) \
4097   _bfd_elf_add_dynamic_entry (info, TAG, VAL)
4098 
4099       if (info->executable)
4100 	{
4101 	  if (!add_dynamic_entry (DT_DEBUG, 0))
4102 	    return FALSE;
4103 	}
4104 
4105       if (relplt)
4106 	{
4107 	  if (!add_dynamic_entry (DT_PLTGOT, 0)
4108 	      || !add_dynamic_entry (DT_PLTRELSZ, 0)
4109 	      || !add_dynamic_entry (DT_PLTREL, DT_RELA)
4110 	      || !add_dynamic_entry (DT_JMPREL, 0))
4111 	    return FALSE;
4112 	}
4113 
4114       if (!add_dynamic_entry (DT_RELA, 0)
4115 	  || !add_dynamic_entry (DT_RELASZ, 0)
4116 	  || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
4117 	return FALSE;
4118 
4119       if (info->flags & DF_TEXTREL)
4120 	{
4121 	  if (!add_dynamic_entry (DT_TEXTREL, 0))
4122 	    return FALSE;
4123 	}
4124     }
4125 #undef add_dynamic_entry
4126 
4127   return TRUE;
4128 }
4129 
4130 /* Emit a dynamic relocation for (DYNINDX, RTYPE, ADDEND) at (SEC, OFFSET)
4131    into the next available slot in SREL.  */
4132 
4133 static void
elf64_alpha_emit_dynrel(abfd,info,sec,srel,offset,dynindx,rtype,addend)4134 elf64_alpha_emit_dynrel (abfd, info, sec, srel, offset, dynindx, rtype, addend)
4135      bfd *abfd;
4136      struct bfd_link_info *info;
4137      asection *sec, *srel;
4138      bfd_vma offset, addend;
4139      long dynindx, rtype;
4140 {
4141   Elf_Internal_Rela outrel;
4142   bfd_byte *loc;
4143 
4144   BFD_ASSERT (srel != NULL);
4145 
4146   outrel.r_info = ELF64_R_INFO (dynindx, rtype);
4147   outrel.r_addend = addend;
4148 
4149   offset = _bfd_elf_section_offset (abfd, info, sec, offset);
4150   if ((offset | 1) != (bfd_vma) -1)
4151     outrel.r_offset = sec->output_section->vma + sec->output_offset + offset;
4152   else
4153     memset (&outrel, 0, sizeof (outrel));
4154 
4155   loc = srel->contents;
4156   loc += srel->reloc_count++ * sizeof (Elf64_External_Rela);
4157   bfd_elf64_swap_reloca_out (abfd, &outrel, loc);
4158   BFD_ASSERT (sizeof (Elf64_External_Rela) * srel->reloc_count
4159 	      <= srel->_cooked_size);
4160 }
4161 
4162 /* Relocate an Alpha ELF section for a relocatable link.
4163 
4164    We don't have to change anything unless the reloc is against a section
4165    symbol, in which case we have to adjust according to where the section
4166    symbol winds up in the output section.  */
4167 
4168 static bfd_boolean
elf64_alpha_relocate_section_r(output_bfd,info,input_bfd,input_section,contents,relocs,local_syms,local_sections)4169 elf64_alpha_relocate_section_r (output_bfd, info, input_bfd, input_section,
4170 			        contents, relocs, local_syms, local_sections)
4171      bfd *output_bfd ATTRIBUTE_UNUSED;
4172      struct bfd_link_info *info ATTRIBUTE_UNUSED;
4173      bfd *input_bfd;
4174      asection *input_section;
4175      bfd_byte *contents ATTRIBUTE_UNUSED;
4176      Elf_Internal_Rela *relocs;
4177      Elf_Internal_Sym *local_syms;
4178      asection **local_sections;
4179 {
4180   unsigned long symtab_hdr_sh_info;
4181   Elf_Internal_Rela *rel;
4182   Elf_Internal_Rela *relend;
4183   bfd_boolean ret_val = TRUE;
4184 
4185   symtab_hdr_sh_info = elf_tdata (input_bfd)->symtab_hdr.sh_info;
4186 
4187   relend = relocs + input_section->reloc_count;
4188   for (rel = relocs; rel < relend; rel++)
4189     {
4190       unsigned long r_symndx;
4191       Elf_Internal_Sym *sym;
4192       asection *sec;
4193       unsigned long r_type;
4194 
4195       r_type = ELF64_R_TYPE(rel->r_info);
4196       if (r_type >= R_ALPHA_max)
4197 	{
4198 	  (*_bfd_error_handler)
4199 	    (_("%s: unknown relocation type %d"),
4200 	     bfd_archive_filename (input_bfd), (int)r_type);
4201 	  bfd_set_error (bfd_error_bad_value);
4202 	  ret_val = FALSE;
4203 	  continue;
4204 	}
4205 
4206       r_symndx = ELF64_R_SYM(rel->r_info);
4207 
4208       /* The symbol associated with GPDISP and LITUSE is
4209 	 immaterial.  Only the addend is significant.  */
4210       if (r_type == R_ALPHA_GPDISP || r_type == R_ALPHA_LITUSE)
4211 	continue;
4212 
4213       if (r_symndx < symtab_hdr_sh_info)
4214 	{
4215 	  sym = local_syms + r_symndx;
4216 	  if (ELF_ST_TYPE(sym->st_info) == STT_SECTION)
4217 	    {
4218 	      sec = local_sections[r_symndx];
4219 	      rel->r_addend += sec->output_offset + sym->st_value;
4220 	    }
4221 	}
4222     }
4223 
4224   return ret_val;
4225 }
4226 
4227 /* Relocate an Alpha ELF section.  */
4228 
4229 static bfd_boolean
elf64_alpha_relocate_section(output_bfd,info,input_bfd,input_section,contents,relocs,local_syms,local_sections)4230 elf64_alpha_relocate_section (output_bfd, info, input_bfd, input_section,
4231 			      contents, relocs, local_syms, local_sections)
4232      bfd *output_bfd;
4233      struct bfd_link_info *info;
4234      bfd *input_bfd;
4235      asection *input_section;
4236      bfd_byte *contents;
4237      Elf_Internal_Rela *relocs;
4238      Elf_Internal_Sym *local_syms;
4239      asection **local_sections;
4240 {
4241   Elf_Internal_Shdr *symtab_hdr;
4242   Elf_Internal_Rela *rel;
4243   Elf_Internal_Rela *relend;
4244   asection *sgot, *srel, *srelgot;
4245   bfd *dynobj, *gotobj;
4246   bfd_vma gp, tp_base, dtp_base;
4247   struct alpha_elf_got_entry **local_got_entries;
4248   bfd_boolean ret_val;
4249   const char *section_name;
4250 
4251   /* Handle relocatable links with a smaller loop.  */
4252   if (info->relocatable)
4253     return elf64_alpha_relocate_section_r (output_bfd, info, input_bfd,
4254 					   input_section, contents, relocs,
4255 					   local_syms, local_sections);
4256 
4257   /* This is a final link.  */
4258 
4259   ret_val = TRUE;
4260 
4261   symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
4262 
4263   dynobj = elf_hash_table (info)->dynobj;
4264   if (dynobj)
4265     srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
4266   else
4267     srelgot = NULL;
4268 
4269   section_name = (bfd_elf_string_from_elf_section
4270 		  (input_bfd, elf_elfheader(input_bfd)->e_shstrndx,
4271 		   elf_section_data(input_section)->rel_hdr.sh_name));
4272   BFD_ASSERT(section_name != NULL);
4273   srel = bfd_get_section_by_name (dynobj, section_name);
4274 
4275   /* Find the gp value for this input bfd.  */
4276   gotobj = alpha_elf_tdata (input_bfd)->gotobj;
4277   if (gotobj)
4278     {
4279       sgot = alpha_elf_tdata (gotobj)->got;
4280       gp = _bfd_get_gp_value (gotobj);
4281       if (gp == 0)
4282 	{
4283 	  gp = (sgot->output_section->vma
4284 		+ sgot->output_offset
4285 		+ 0x8000);
4286 	  _bfd_set_gp_value (gotobj, gp);
4287 	}
4288     }
4289   else
4290     {
4291       sgot = NULL;
4292       gp = 0;
4293     }
4294 
4295   local_got_entries = alpha_elf_tdata(input_bfd)->local_got_entries;
4296 
4297   if (elf_hash_table (info)->tls_sec != NULL)
4298     {
4299       dtp_base = alpha_get_dtprel_base (info);
4300       tp_base = alpha_get_tprel_base (info);
4301     }
4302   else
4303     dtp_base = tp_base = 0;
4304 
4305   relend = relocs + input_section->reloc_count;
4306   for (rel = relocs; rel < relend; rel++)
4307     {
4308       struct alpha_elf_link_hash_entry *h = NULL;
4309       struct alpha_elf_got_entry *gotent;
4310       bfd_reloc_status_type r;
4311       reloc_howto_type *howto;
4312       unsigned long r_symndx;
4313       Elf_Internal_Sym *sym = NULL;
4314       asection *sec = NULL;
4315       bfd_vma value;
4316       bfd_vma addend;
4317       bfd_boolean dynamic_symbol_p;
4318       bfd_boolean undef_weak_ref = FALSE;
4319       unsigned long r_type;
4320 
4321       r_type = ELF64_R_TYPE(rel->r_info);
4322       if (r_type >= R_ALPHA_max)
4323 	{
4324 	  (*_bfd_error_handler)
4325 	    (_("%s: unknown relocation type %d"),
4326 	     bfd_archive_filename (input_bfd), (int)r_type);
4327 	  bfd_set_error (bfd_error_bad_value);
4328 	  ret_val = FALSE;
4329 	  continue;
4330 	}
4331 
4332       howto = elf64_alpha_howto_table + r_type;
4333       r_symndx = ELF64_R_SYM(rel->r_info);
4334 
4335       /* The symbol for a TLSLDM reloc is ignored.  Collapse the
4336 	 reloc to the 0 symbol so that they all match.  */
4337       if (r_type == R_ALPHA_TLSLDM)
4338 	r_symndx = 0;
4339 
4340       if (r_symndx < symtab_hdr->sh_info)
4341 	{
4342 	  asection *msec;
4343 	  sym = local_syms + r_symndx;
4344 	  sec = local_sections[r_symndx];
4345 	  msec = sec;
4346 	  value = _bfd_elf_rela_local_sym (output_bfd, sym, &msec, rel);
4347 
4348 	  /* If this is a tp-relative relocation against sym 0,
4349 	     this is hackery from relax_section.  Force the value to
4350 	     be the tls base.  */
4351 	  if (r_symndx == 0
4352 	      && (r_type == R_ALPHA_TLSLDM
4353 		  || r_type == R_ALPHA_GOTTPREL
4354 		  || r_type == R_ALPHA_TPREL64
4355 		  || r_type == R_ALPHA_TPRELHI
4356 		  || r_type == R_ALPHA_TPRELLO
4357 		  || r_type == R_ALPHA_TPREL16))
4358 	    value = tp_base;
4359 
4360 	  if (local_got_entries)
4361 	    gotent = local_got_entries[r_symndx];
4362 	  else
4363 	    gotent = NULL;
4364 
4365 	  /* Need to adjust local GOT entries' addends for SEC_MERGE
4366 	     unless it has been done already.  */
4367 	  if ((sec->flags & SEC_MERGE)
4368 	      && ELF_ST_TYPE (sym->st_info) == STT_SECTION
4369 	      && sec->sec_info_type == ELF_INFO_TYPE_MERGE
4370 	      && gotent
4371 	      && !gotent->reloc_xlated)
4372 	    {
4373 	      struct alpha_elf_got_entry *ent;
4374 
4375 	      for (ent = gotent; ent; ent = ent->next)
4376 		{
4377 		  ent->reloc_xlated = 1;
4378 		  if (ent->use_count == 0)
4379 		    continue;
4380 		  msec = sec;
4381 		  ent->addend =
4382 		    _bfd_merged_section_offset (output_bfd, &msec,
4383 						elf_section_data (sec)->
4384 						  sec_info,
4385 						sym->st_value + ent->addend,
4386 						(bfd_vma) 0);
4387 		  ent->addend -= sym->st_value;
4388 		  ent->addend += msec->output_section->vma
4389 				 + msec->output_offset
4390 				 - sec->output_section->vma
4391 				 - sec->output_offset;
4392 		}
4393 	    }
4394 
4395 	  dynamic_symbol_p = FALSE;
4396 	}
4397       else
4398 	{
4399 	  bfd_boolean warned;
4400 	  bfd_boolean unresolved_reloc;
4401 	  struct elf_link_hash_entry *hh;
4402 	  struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (input_bfd);
4403 
4404 	  RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
4405 				   r_symndx, symtab_hdr, sym_hashes,
4406 				   hh, sec, value,
4407 				   unresolved_reloc, warned);
4408 
4409 	  if (warned)
4410 	    continue;
4411 
4412 	  if (value == 0
4413 	      && ! unresolved_reloc
4414 	      && hh->root.type == bfd_link_hash_undefweak)
4415 	    undef_weak_ref = TRUE;
4416 
4417 	  h = (struct alpha_elf_link_hash_entry *) hh;
4418           dynamic_symbol_p = alpha_elf_dynamic_symbol_p (&h->root, info);
4419 	  gotent = h->got_entries;
4420 	}
4421 
4422       addend = rel->r_addend;
4423       value += addend;
4424 
4425       /* Search for the proper got entry.  */
4426       for (; gotent ; gotent = gotent->next)
4427 	if (gotent->gotobj == gotobj
4428 	    && gotent->reloc_type == r_type
4429 	    && gotent->addend == addend)
4430 	  break;
4431 
4432       switch (r_type)
4433 	{
4434 	case R_ALPHA_GPDISP:
4435 	  {
4436 	    bfd_byte *p_ldah, *p_lda;
4437 
4438 	    BFD_ASSERT(gp != 0);
4439 
4440 	    value = (input_section->output_section->vma
4441 		     + input_section->output_offset
4442 		     + rel->r_offset);
4443 
4444 	    p_ldah = contents + rel->r_offset;
4445 	    p_lda = p_ldah + rel->r_addend;
4446 
4447 	    r = elf64_alpha_do_reloc_gpdisp (input_bfd, gp - value,
4448 					     p_ldah, p_lda);
4449 	  }
4450 	  break;
4451 
4452 	case R_ALPHA_LITERAL:
4453 	  BFD_ASSERT(sgot != NULL);
4454 	  BFD_ASSERT(gp != 0);
4455 	  BFD_ASSERT(gotent != NULL);
4456 	  BFD_ASSERT(gotent->use_count >= 1);
4457 
4458 	  if (!gotent->reloc_done)
4459 	    {
4460 	      gotent->reloc_done = 1;
4461 
4462 	      bfd_put_64 (output_bfd, value,
4463 			  sgot->contents + gotent->got_offset);
4464 
4465 	      /* If the symbol has been forced local, output a
4466 		 RELATIVE reloc, otherwise it will be handled in
4467 		 finish_dynamic_symbol.  */
4468 	      if (info->shared && !dynamic_symbol_p)
4469 		elf64_alpha_emit_dynrel (output_bfd, info, sgot, srelgot,
4470 					 gotent->got_offset, 0,
4471 					 R_ALPHA_RELATIVE, value);
4472 	    }
4473 
4474 	  value = (sgot->output_section->vma
4475 		   + sgot->output_offset
4476 		   + gotent->got_offset);
4477 	  value -= gp;
4478 	  goto default_reloc;
4479 
4480 	case R_ALPHA_GPREL32:
4481 	  /* If the target section was a removed linkonce section,
4482 	     r_symndx will be zero.  In this case, assume that the
4483 	     switch will not be used, so don't fill it in.  If we
4484 	     do nothing here, we'll get relocation truncated messages,
4485 	     due to the placement of the application above 4GB.  */
4486 	  if (r_symndx == 0)
4487 	    {
4488 	      r = bfd_reloc_ok;
4489 	      break;
4490 	    }
4491 	  /* FALLTHRU */
4492 
4493 	case R_ALPHA_GPREL16:
4494 	case R_ALPHA_GPRELLOW:
4495 	  if (dynamic_symbol_p)
4496             {
4497               (*_bfd_error_handler)
4498                 (_("%s: gp-relative relocation against dynamic symbol %s"),
4499                  bfd_archive_filename (input_bfd), h->root.root.root.string);
4500               ret_val = FALSE;
4501             }
4502 	  BFD_ASSERT(gp != 0);
4503 	  value -= gp;
4504 	  goto default_reloc;
4505 
4506 	case R_ALPHA_GPRELHIGH:
4507 	  if (dynamic_symbol_p)
4508             {
4509               (*_bfd_error_handler)
4510                 (_("%s: gp-relative relocation against dynamic symbol %s"),
4511                  bfd_archive_filename (input_bfd), h->root.root.root.string);
4512               ret_val = FALSE;
4513             }
4514 	  BFD_ASSERT(gp != 0);
4515 	  value -= gp;
4516 	  value = ((bfd_signed_vma) value >> 16) + ((value >> 15) & 1);
4517 	  goto default_reloc;
4518 
4519 	case R_ALPHA_HINT:
4520 	  /* A call to a dynamic symbol is definitely out of range of
4521 	     the 16-bit displacement.  Don't bother writing anything.  */
4522 	  if (dynamic_symbol_p)
4523 	    {
4524 	      r = bfd_reloc_ok;
4525 	      break;
4526 	    }
4527 	  /* The regular PC-relative stuff measures from the start of
4528 	     the instruction rather than the end.  */
4529 	  value -= 4;
4530 	  goto default_reloc;
4531 
4532 	case R_ALPHA_BRADDR:
4533 	  if (dynamic_symbol_p)
4534             {
4535               (*_bfd_error_handler)
4536                 (_("%s: pc-relative relocation against dynamic symbol %s"),
4537                  bfd_archive_filename (input_bfd), h->root.root.root.string);
4538               ret_val = FALSE;
4539             }
4540 	  /* The regular PC-relative stuff measures from the start of
4541 	     the instruction rather than the end.  */
4542 	  value -= 4;
4543 	  goto default_reloc;
4544 
4545 	case R_ALPHA_BRSGP:
4546 	  {
4547 	    int other;
4548 	    const char *name;
4549 
4550 	    /* The regular PC-relative stuff measures from the start of
4551 	       the instruction rather than the end.  */
4552 	    value -= 4;
4553 
4554 	    /* The source and destination gp must be the same.  Note that
4555 	       the source will always have an assigned gp, since we forced
4556 	       one in check_relocs, but that the destination may not, as
4557 	       it might not have had any relocations at all.  Also take
4558 	       care not to crash if H is an undefined symbol.  */
4559 	    if (h != NULL && sec != NULL
4560 		&& alpha_elf_tdata (sec->owner)->gotobj
4561 		&& gotobj != alpha_elf_tdata (sec->owner)->gotobj)
4562 	      {
4563 		(*_bfd_error_handler)
4564 		  (_("%s: change in gp: BRSGP %s"),
4565 		   bfd_archive_filename (input_bfd), h->root.root.root.string);
4566 		ret_val = FALSE;
4567 	      }
4568 
4569 	    /* The symbol should be marked either NOPV or STD_GPLOAD.  */
4570 	    if (h != NULL)
4571 	      other = h->root.other;
4572 	    else
4573 	      other = sym->st_other;
4574 	    switch (other & STO_ALPHA_STD_GPLOAD)
4575 	      {
4576 	      case STO_ALPHA_NOPV:
4577 	        break;
4578 	      case STO_ALPHA_STD_GPLOAD:
4579 		value += 8;
4580 		break;
4581 	      default:
4582 		if (h != NULL)
4583 		  name = h->root.root.root.string;
4584 		else
4585 		  {
4586 		    name = (bfd_elf_string_from_elf_section
4587 			    (input_bfd, symtab_hdr->sh_link, sym->st_name));
4588 		    if (name == NULL)
4589 		      name = _("<unknown>");
4590 		    else if (name[0] == 0)
4591 		      name = bfd_section_name (input_bfd, sec);
4592 		  }
4593 		(*_bfd_error_handler)
4594 		  (_("%s: !samegp reloc against symbol without .prologue: %s"),
4595 		   bfd_archive_filename (input_bfd), name);
4596 		ret_val = FALSE;
4597 		break;
4598 	      }
4599 
4600 	    goto default_reloc;
4601 	  }
4602 
4603 	case R_ALPHA_REFLONG:
4604 	case R_ALPHA_REFQUAD:
4605 	case R_ALPHA_DTPREL64:
4606 	case R_ALPHA_TPREL64:
4607 	  {
4608 	    long dynindx, dyntype = r_type;
4609 	    bfd_vma dynaddend;
4610 
4611 	    /* Careful here to remember RELATIVE relocations for global
4612 	       variables for symbolic shared objects.  */
4613 
4614 	    if (dynamic_symbol_p)
4615 	      {
4616 		BFD_ASSERT(h->root.dynindx != -1);
4617 		dynindx = h->root.dynindx;
4618 		dynaddend = addend;
4619 		addend = 0, value = 0;
4620 	      }
4621 	    else if (r_type == R_ALPHA_DTPREL64)
4622 	      {
4623 		BFD_ASSERT (elf_hash_table (info)->tls_sec != NULL);
4624 		value -= dtp_base;
4625 		goto default_reloc;
4626 	      }
4627 	    else if (r_type == R_ALPHA_TPREL64)
4628 	      {
4629 		BFD_ASSERT (elf_hash_table (info)->tls_sec != NULL);
4630 		if (!info->shared)
4631 		  {
4632 		    value -= tp_base;
4633 		    goto default_reloc;
4634 		  }
4635 		dynindx = 0;
4636 		dynaddend = value - dtp_base;
4637 	      }
4638 	    else if (info->shared
4639 		     && r_symndx != 0
4640 		     && (input_section->flags & SEC_ALLOC))
4641 	      {
4642 		if (r_type == R_ALPHA_REFLONG)
4643 		  {
4644 		    (*_bfd_error_handler)
4645 		      (_("%s: unhandled dynamic relocation against %s"),
4646 		       bfd_archive_filename (input_bfd),
4647 		       h->root.root.root.string);
4648 		    ret_val = FALSE;
4649 		  }
4650 		dynindx = 0;
4651 		dyntype = R_ALPHA_RELATIVE;
4652 		dynaddend = value;
4653 	      }
4654 	    else
4655 	      goto default_reloc;
4656 
4657 	    elf64_alpha_emit_dynrel (output_bfd, info, input_section,
4658 				     srel, rel->r_offset, dynindx,
4659 				     dyntype, dynaddend);
4660 	  }
4661 	  goto default_reloc;
4662 
4663 	case R_ALPHA_SREL16:
4664 	case R_ALPHA_SREL32:
4665 	case R_ALPHA_SREL64:
4666 	  if (dynamic_symbol_p)
4667             {
4668               (*_bfd_error_handler)
4669                 (_("%s: pc-relative relocation against dynamic symbol %s"),
4670                  bfd_archive_filename (input_bfd), h->root.root.root.string);
4671               ret_val = FALSE;
4672             }
4673 
4674 	  /* ??? .eh_frame references to discarded sections will be smashed
4675 	     to relocations against SHN_UNDEF.  The .eh_frame format allows
4676 	     NULL to be encoded as 0 in any format, so this works here.  */
4677 	  if (r_symndx == 0)
4678 	    howto = (elf64_alpha_howto_table
4679 		     + (r_type - R_ALPHA_SREL32 + R_ALPHA_REFLONG));
4680 	  goto default_reloc;
4681 
4682 	case R_ALPHA_TLSLDM:
4683 	  /* Ignore the symbol for the relocation.  The result is always
4684 	     the current module.  */
4685 	  dynamic_symbol_p = 0;
4686 	  /* FALLTHRU */
4687 
4688 	case R_ALPHA_TLSGD:
4689 	  if (!gotent->reloc_done)
4690 	    {
4691 	      gotent->reloc_done = 1;
4692 
4693 	      /* Note that the module index for the main program is 1.  */
4694 	      bfd_put_64 (output_bfd, !info->shared && !dynamic_symbol_p,
4695 			  sgot->contents + gotent->got_offset);
4696 
4697 	      /* If the symbol has been forced local, output a
4698 		 DTPMOD64 reloc, otherwise it will be handled in
4699 		 finish_dynamic_symbol.  */
4700 	      if (info->shared && !dynamic_symbol_p)
4701 		elf64_alpha_emit_dynrel (output_bfd, info, sgot, srelgot,
4702 					 gotent->got_offset, 0,
4703 					 R_ALPHA_DTPMOD64, 0);
4704 
4705 	      if (dynamic_symbol_p || r_type == R_ALPHA_TLSLDM)
4706 		value = 0;
4707 	      else
4708 		{
4709 		  BFD_ASSERT (elf_hash_table (info)->tls_sec != NULL);
4710 	          value -= dtp_base;
4711 		}
4712 	      bfd_put_64 (output_bfd, value,
4713 			  sgot->contents + gotent->got_offset + 8);
4714 	    }
4715 
4716 	  value = (sgot->output_section->vma
4717 		   + sgot->output_offset
4718 		   + gotent->got_offset);
4719 	  value -= gp;
4720 	  goto default_reloc;
4721 
4722 	case R_ALPHA_DTPRELHI:
4723 	case R_ALPHA_DTPRELLO:
4724 	case R_ALPHA_DTPREL16:
4725 	  if (dynamic_symbol_p)
4726             {
4727               (*_bfd_error_handler)
4728                 (_("%s: dtp-relative relocation against dynamic symbol %s"),
4729                  bfd_archive_filename (input_bfd), h->root.root.root.string);
4730               ret_val = FALSE;
4731             }
4732 	  BFD_ASSERT (elf_hash_table (info)->tls_sec != NULL);
4733 	  value -= dtp_base;
4734 	  if (r_type == R_ALPHA_DTPRELHI)
4735 	    value = ((bfd_signed_vma) value >> 16) + ((value >> 15) & 1);
4736 	  goto default_reloc;
4737 
4738 	case R_ALPHA_TPRELHI:
4739 	case R_ALPHA_TPRELLO:
4740 	case R_ALPHA_TPREL16:
4741 	  if (info->shared)
4742 	    {
4743 	      (*_bfd_error_handler)
4744 		(_("%s: TLS local exec code cannot be linked into shared objects"),
4745 		bfd_archive_filename (input_bfd));
4746               ret_val = FALSE;
4747 	    }
4748 	  else if (dynamic_symbol_p)
4749             {
4750               (*_bfd_error_handler)
4751                 (_("%s: tp-relative relocation against dynamic symbol %s"),
4752                  bfd_archive_filename (input_bfd), h->root.root.root.string);
4753               ret_val = FALSE;
4754             }
4755 	  BFD_ASSERT (elf_hash_table (info)->tls_sec != NULL);
4756 	  value -= tp_base;
4757 	  if (r_type == R_ALPHA_TPRELHI)
4758 	    value = ((bfd_signed_vma) value >> 16) + ((value >> 15) & 1);
4759 	  goto default_reloc;
4760 
4761 	case R_ALPHA_GOTDTPREL:
4762 	case R_ALPHA_GOTTPREL:
4763 	  BFD_ASSERT(sgot != NULL);
4764 	  BFD_ASSERT(gp != 0);
4765 	  BFD_ASSERT(gotent != NULL);
4766 	  BFD_ASSERT(gotent->use_count >= 1);
4767 
4768 	  if (!gotent->reloc_done)
4769 	    {
4770 	      gotent->reloc_done = 1;
4771 
4772 	      if (dynamic_symbol_p)
4773 		value = 0;
4774 	      else
4775 		{
4776 		  BFD_ASSERT (elf_hash_table (info)->tls_sec != NULL);
4777 		  if (r_type == R_ALPHA_GOTDTPREL)
4778 		    value -= dtp_base;
4779 		  else if (!info->shared)
4780 		    value -= tp_base;
4781 		  else
4782 		    {
4783 		      elf64_alpha_emit_dynrel (output_bfd, info, sgot, srelgot,
4784 					       gotent->got_offset, 0,
4785 					       R_ALPHA_TPREL64,
4786 					       value - dtp_base);
4787 		      value = 0;
4788 		    }
4789 		}
4790 	      bfd_put_64 (output_bfd, value,
4791 			  sgot->contents + gotent->got_offset);
4792 	    }
4793 
4794 	  value = (sgot->output_section->vma
4795 		   + sgot->output_offset
4796 		   + gotent->got_offset);
4797 	  value -= gp;
4798 	  goto default_reloc;
4799 
4800 	default:
4801 	default_reloc:
4802 	  r = _bfd_final_link_relocate (howto, input_bfd, input_section,
4803 					contents, rel->r_offset, value, 0);
4804 	  break;
4805 	}
4806 
4807       switch (r)
4808 	{
4809 	case bfd_reloc_ok:
4810 	  break;
4811 
4812 	case bfd_reloc_overflow:
4813 	  {
4814 	    const char *name;
4815 
4816 	    /* Don't warn if the overflow is due to pc relative reloc
4817 	       against discarded section.  Section optimization code should
4818 	       handle it.  */
4819 
4820 	    if (r_symndx < symtab_hdr->sh_info
4821 		&& sec != NULL && howto->pc_relative
4822 		&& elf_discarded_section (sec))
4823 	      break;
4824 
4825 	    if (h != NULL)
4826 	      name = h->root.root.root.string;
4827 	    else
4828 	      {
4829 		name = (bfd_elf_string_from_elf_section
4830 			(input_bfd, symtab_hdr->sh_link, sym->st_name));
4831 		if (name == NULL)
4832 		  return FALSE;
4833 		if (*name == '\0')
4834 		  name = bfd_section_name (input_bfd, sec);
4835 	      }
4836 	    if (! ((*info->callbacks->reloc_overflow)
4837 		   (info, name, howto->name, (bfd_vma) 0,
4838 		    input_bfd, input_section, rel->r_offset)))
4839 	      ret_val = FALSE;
4840 	  }
4841 	  break;
4842 
4843 	default:
4844 	case bfd_reloc_outofrange:
4845 	  abort ();
4846 	}
4847     }
4848 
4849   return ret_val;
4850 }
4851 
4852 /* Finish up dynamic symbol handling.  We set the contents of various
4853    dynamic sections here.  */
4854 
4855 static bfd_boolean
elf64_alpha_finish_dynamic_symbol(output_bfd,info,h,sym)4856 elf64_alpha_finish_dynamic_symbol (output_bfd, info, h, sym)
4857      bfd *output_bfd;
4858      struct bfd_link_info *info;
4859      struct elf_link_hash_entry *h;
4860      Elf_Internal_Sym *sym;
4861 {
4862   bfd *dynobj = elf_hash_table(info)->dynobj;
4863 
4864   if (h->plt.offset != MINUS_ONE)
4865     {
4866       /* Fill in the .plt entry for this symbol.  */
4867       asection *splt, *sgot, *srel;
4868       Elf_Internal_Rela outrel;
4869       bfd_byte *loc;
4870       bfd_vma got_addr, plt_addr;
4871       bfd_vma plt_index;
4872       struct alpha_elf_got_entry *gotent;
4873 
4874       BFD_ASSERT (h->dynindx != -1);
4875 
4876       /* The first .got entry will be updated by the .plt with the
4877 	 address of the target function.  */
4878       gotent = ((struct alpha_elf_link_hash_entry *) h)->got_entries;
4879       BFD_ASSERT (gotent && gotent->addend == 0);
4880 
4881       splt = bfd_get_section_by_name (dynobj, ".plt");
4882       BFD_ASSERT (splt != NULL);
4883       srel = bfd_get_section_by_name (dynobj, ".rela.plt");
4884       BFD_ASSERT (srel != NULL);
4885       sgot = alpha_elf_tdata (gotent->gotobj)->got;
4886       BFD_ASSERT (sgot != NULL);
4887 
4888       got_addr = (sgot->output_section->vma
4889 		  + sgot->output_offset
4890 		  + gotent->got_offset);
4891       plt_addr = (splt->output_section->vma
4892 		  + splt->output_offset
4893 		  + h->plt.offset);
4894 
4895       plt_index = (h->plt.offset - PLT_HEADER_SIZE) / PLT_ENTRY_SIZE;
4896 
4897       /* Fill in the entry in the procedure linkage table.  */
4898       {
4899 	bfd_vma insn1, insn2, insn3;
4900 
4901 	insn1 = PLT_ENTRY_WORD1 | ((-(h->plt.offset + 4) >> 2) & 0x1fffff);
4902 	insn2 = PLT_ENTRY_WORD2;
4903 	insn3 = PLT_ENTRY_WORD3;
4904 
4905 	bfd_put_32 (output_bfd, insn1, splt->contents + h->plt.offset);
4906 	bfd_put_32 (output_bfd, insn2, splt->contents + h->plt.offset + 4);
4907 	bfd_put_32 (output_bfd, insn3, splt->contents + h->plt.offset + 8);
4908       }
4909 
4910       /* Fill in the entry in the .rela.plt section.  */
4911       outrel.r_offset = got_addr;
4912       outrel.r_info = ELF64_R_INFO(h->dynindx, R_ALPHA_JMP_SLOT);
4913       outrel.r_addend = 0;
4914 
4915       loc = srel->contents + plt_index * sizeof (Elf64_External_Rela);
4916       bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
4917 
4918       if (!(h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR))
4919 	{
4920 	  /* Mark the symbol as undefined, rather than as defined in the
4921 	     .plt section.  Leave the value alone.  */
4922 	  sym->st_shndx = SHN_UNDEF;
4923 	}
4924 
4925       /* Fill in the entries in the .got.  */
4926       bfd_put_64 (output_bfd, plt_addr, sgot->contents + gotent->got_offset);
4927 
4928       /* Subsequent .got entries will continue to bounce through the .plt.  */
4929       if (gotent->next)
4930 	{
4931 	  srel = bfd_get_section_by_name (dynobj, ".rela.got");
4932 	  BFD_ASSERT (! info->shared || srel != NULL);
4933 
4934 	  gotent = gotent->next;
4935 	  do
4936 	    {
4937 	      sgot = alpha_elf_tdata(gotent->gotobj)->got;
4938 	      BFD_ASSERT(sgot != NULL);
4939 	      BFD_ASSERT(gotent->addend == 0);
4940 
4941 	      bfd_put_64 (output_bfd, plt_addr,
4942 		          sgot->contents + gotent->got_offset);
4943 
4944 	      if (info->shared)
4945 		elf64_alpha_emit_dynrel (output_bfd, info, sgot, srel,
4946 					 gotent->got_offset, 0,
4947 					 R_ALPHA_RELATIVE, plt_addr);
4948 
4949 	      gotent = gotent->next;
4950 	    }
4951           while (gotent != NULL);
4952 	}
4953     }
4954   else if (alpha_elf_dynamic_symbol_p (h, info))
4955     {
4956       /* Fill in the dynamic relocations for this symbol's .got entries.  */
4957       asection *srel;
4958       struct alpha_elf_got_entry *gotent;
4959 
4960       srel = bfd_get_section_by_name (dynobj, ".rela.got");
4961       BFD_ASSERT (srel != NULL);
4962 
4963       for (gotent = ((struct alpha_elf_link_hash_entry *) h)->got_entries;
4964 	   gotent != NULL;
4965 	   gotent = gotent->next)
4966 	{
4967 	  asection *sgot;
4968 	  long r_type;
4969 
4970 	  if (gotent->use_count == 0)
4971 	    continue;
4972 
4973 	  sgot = alpha_elf_tdata (gotent->gotobj)->got;
4974 
4975 	  r_type = gotent->reloc_type;
4976 	  switch (r_type)
4977 	    {
4978 	    case R_ALPHA_LITERAL:
4979 	      r_type = R_ALPHA_GLOB_DAT;
4980 	      break;
4981 	    case R_ALPHA_TLSGD:
4982 	      r_type = R_ALPHA_DTPMOD64;
4983 	      break;
4984 	    case R_ALPHA_GOTDTPREL:
4985 	      r_type = R_ALPHA_DTPREL64;
4986 	      break;
4987 	    case R_ALPHA_GOTTPREL:
4988 	      r_type = R_ALPHA_TPREL64;
4989 	      break;
4990 	    case R_ALPHA_TLSLDM:
4991 	    default:
4992 	      abort ();
4993 	    }
4994 
4995 	  elf64_alpha_emit_dynrel (output_bfd, info, sgot, srel,
4996 				   gotent->got_offset, h->dynindx,
4997 				   r_type, gotent->addend);
4998 
4999 	  if (gotent->reloc_type == R_ALPHA_TLSGD)
5000 	    elf64_alpha_emit_dynrel (output_bfd, info, sgot, srel,
5001 				     gotent->got_offset + 8, h->dynindx,
5002 				     R_ALPHA_DTPREL64, gotent->addend);
5003 	}
5004     }
5005 
5006   /* Mark some specially defined symbols as absolute.  */
5007   if (strcmp (h->root.root.string, "_DYNAMIC") == 0
5008       || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0
5009       || strcmp (h->root.root.string, "_PROCEDURE_LINKAGE_TABLE_") == 0)
5010     sym->st_shndx = SHN_ABS;
5011 
5012   return TRUE;
5013 }
5014 
5015 /* Finish up the dynamic sections.  */
5016 
5017 static bfd_boolean
elf64_alpha_finish_dynamic_sections(output_bfd,info)5018 elf64_alpha_finish_dynamic_sections (output_bfd, info)
5019      bfd *output_bfd;
5020      struct bfd_link_info *info;
5021 {
5022   bfd *dynobj;
5023   asection *sdyn;
5024 
5025   dynobj = elf_hash_table (info)->dynobj;
5026   sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
5027 
5028   if (elf_hash_table (info)->dynamic_sections_created)
5029     {
5030       asection *splt;
5031       Elf64_External_Dyn *dyncon, *dynconend;
5032 
5033       splt = bfd_get_section_by_name (dynobj, ".plt");
5034       BFD_ASSERT (splt != NULL && sdyn != NULL);
5035 
5036       dyncon = (Elf64_External_Dyn *) sdyn->contents;
5037       dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->_raw_size);
5038       for (; dyncon < dynconend; dyncon++)
5039 	{
5040 	  Elf_Internal_Dyn dyn;
5041 	  const char *name;
5042 	  asection *s;
5043 
5044 	  bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
5045 
5046 	  switch (dyn.d_tag)
5047 	    {
5048 	    case DT_PLTGOT:
5049 	      name = ".plt";
5050 	      goto get_vma;
5051 	    case DT_PLTRELSZ:
5052 	      name = ".rela.plt";
5053 	      goto get_size;
5054 	    case DT_JMPREL:
5055 	      name = ".rela.plt";
5056 	      goto get_vma;
5057 
5058 	    case DT_RELASZ:
5059 	      /* My interpretation of the TIS v1.1 ELF document indicates
5060 		 that RELASZ should not include JMPREL.  This is not what
5061 		 the rest of the BFD does.  It is, however, what the
5062 		 glibc ld.so wants.  Do this fixup here until we found
5063 		 out who is right.  */
5064 	      s = bfd_get_section_by_name (output_bfd, ".rela.plt");
5065 	      if (s)
5066 		{
5067 		  dyn.d_un.d_val -=
5068 		    (s->_cooked_size ? s->_cooked_size : s->_raw_size);
5069 		}
5070 	      break;
5071 
5072 	    get_vma:
5073 	      s = bfd_get_section_by_name (output_bfd, name);
5074 	      dyn.d_un.d_ptr = (s ? s->vma : 0);
5075 	      break;
5076 
5077 	    get_size:
5078 	      s = bfd_get_section_by_name (output_bfd, name);
5079 	      dyn.d_un.d_val =
5080 		(s->_cooked_size ? s->_cooked_size : s->_raw_size);
5081 	      break;
5082 	    }
5083 
5084 	  bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
5085 	}
5086 
5087       /* Initialize the PLT0 entry.  */
5088       if (splt->_raw_size > 0)
5089 	{
5090 	  bfd_put_32 (output_bfd, PLT_HEADER_WORD1, splt->contents);
5091 	  bfd_put_32 (output_bfd, PLT_HEADER_WORD2, splt->contents + 4);
5092 	  bfd_put_32 (output_bfd, PLT_HEADER_WORD3, splt->contents + 8);
5093 	  bfd_put_32 (output_bfd, PLT_HEADER_WORD4, splt->contents + 12);
5094 
5095 	  /* The next two words will be filled in by ld.so */
5096 	  bfd_put_64 (output_bfd, (bfd_vma) 0, splt->contents + 16);
5097 	  bfd_put_64 (output_bfd, (bfd_vma) 0, splt->contents + 24);
5098 
5099 	  elf_section_data (splt->output_section)->this_hdr.sh_entsize = 0;
5100 	}
5101     }
5102 
5103   return TRUE;
5104 }
5105 
5106 /* We need to use a special link routine to handle the .mdebug section.
5107    We need to merge all instances of these sections together, not write
5108    them all out sequentially.  */
5109 
5110 static bfd_boolean
elf64_alpha_final_link(abfd,info)5111 elf64_alpha_final_link (abfd, info)
5112      bfd *abfd;
5113      struct bfd_link_info *info;
5114 {
5115   asection *o;
5116   struct bfd_link_order *p;
5117   asection *mdebug_sec;
5118   struct ecoff_debug_info debug;
5119   const struct ecoff_debug_swap *swap
5120     = get_elf_backend_data (abfd)->elf_backend_ecoff_debug_swap;
5121   HDRR *symhdr = &debug.symbolic_header;
5122   PTR mdebug_handle = NULL;
5123 
5124   /* Go through the sections and collect the mdebug information.  */
5125   mdebug_sec = NULL;
5126   for (o = abfd->sections; o != (asection *) NULL; o = o->next)
5127     {
5128       if (strcmp (o->name, ".mdebug") == 0)
5129 	{
5130 	  struct extsym_info einfo;
5131 
5132 	  /* We have found the .mdebug section in the output file.
5133 	     Look through all the link_orders comprising it and merge
5134 	     the information together.  */
5135 	  symhdr->magic = swap->sym_magic;
5136 	  /* FIXME: What should the version stamp be?  */
5137 	  symhdr->vstamp = 0;
5138 	  symhdr->ilineMax = 0;
5139 	  symhdr->cbLine = 0;
5140 	  symhdr->idnMax = 0;
5141 	  symhdr->ipdMax = 0;
5142 	  symhdr->isymMax = 0;
5143 	  symhdr->ioptMax = 0;
5144 	  symhdr->iauxMax = 0;
5145 	  symhdr->issMax = 0;
5146 	  symhdr->issExtMax = 0;
5147 	  symhdr->ifdMax = 0;
5148 	  symhdr->crfd = 0;
5149 	  symhdr->iextMax = 0;
5150 
5151 	  /* We accumulate the debugging information itself in the
5152 	     debug_info structure.  */
5153 	  debug.line = NULL;
5154 	  debug.external_dnr = NULL;
5155 	  debug.external_pdr = NULL;
5156 	  debug.external_sym = NULL;
5157 	  debug.external_opt = NULL;
5158 	  debug.external_aux = NULL;
5159 	  debug.ss = NULL;
5160 	  debug.ssext = debug.ssext_end = NULL;
5161 	  debug.external_fdr = NULL;
5162 	  debug.external_rfd = NULL;
5163 	  debug.external_ext = debug.external_ext_end = NULL;
5164 
5165 	  mdebug_handle = bfd_ecoff_debug_init (abfd, &debug, swap, info);
5166 	  if (mdebug_handle == (PTR) NULL)
5167 	    return FALSE;
5168 
5169 	  if (1)
5170 	    {
5171 	      asection *s;
5172 	      EXTR esym;
5173 	      bfd_vma last = 0;
5174 	      unsigned int i;
5175 	      static const char * const name[] =
5176 		{
5177 		  ".text", ".init", ".fini", ".data",
5178 		  ".rodata", ".sdata", ".sbss", ".bss"
5179 		};
5180 	      static const int sc[] = { scText, scInit, scFini, scData,
5181 					  scRData, scSData, scSBss, scBss };
5182 
5183 	      esym.jmptbl = 0;
5184 	      esym.cobol_main = 0;
5185 	      esym.weakext = 0;
5186 	      esym.reserved = 0;
5187 	      esym.ifd = ifdNil;
5188 	      esym.asym.iss = issNil;
5189 	      esym.asym.st = stLocal;
5190 	      esym.asym.reserved = 0;
5191 	      esym.asym.index = indexNil;
5192 	      for (i = 0; i < 8; i++)
5193 		{
5194 		  esym.asym.sc = sc[i];
5195 		  s = bfd_get_section_by_name (abfd, name[i]);
5196 		  if (s != NULL)
5197 		    {
5198 		      esym.asym.value = s->vma;
5199 		      last = s->vma + s->_raw_size;
5200 		    }
5201 		  else
5202 		    esym.asym.value = last;
5203 
5204 		  if (! bfd_ecoff_debug_one_external (abfd, &debug, swap,
5205 						      name[i], &esym))
5206 		    return FALSE;
5207 		}
5208 	    }
5209 
5210 	  for (p = o->link_order_head;
5211 	       p != (struct bfd_link_order *) NULL;
5212 	       p = p->next)
5213 	    {
5214 	      asection *input_section;
5215 	      bfd *input_bfd;
5216 	      const struct ecoff_debug_swap *input_swap;
5217 	      struct ecoff_debug_info input_debug;
5218 	      char *eraw_src;
5219 	      char *eraw_end;
5220 
5221 	      if (p->type != bfd_indirect_link_order)
5222 		{
5223 		  if (p->type == bfd_data_link_order)
5224 		    continue;
5225 		  abort ();
5226 		}
5227 
5228 	      input_section = p->u.indirect.section;
5229 	      input_bfd = input_section->owner;
5230 
5231 	      if (bfd_get_flavour (input_bfd) != bfd_target_elf_flavour
5232 		  || (get_elf_backend_data (input_bfd)
5233 		      ->elf_backend_ecoff_debug_swap) == NULL)
5234 		{
5235 		  /* I don't know what a non ALPHA ELF bfd would be
5236 		     doing with a .mdebug section, but I don't really
5237 		     want to deal with it.  */
5238 		  continue;
5239 		}
5240 
5241 	      input_swap = (get_elf_backend_data (input_bfd)
5242 			    ->elf_backend_ecoff_debug_swap);
5243 
5244 	      BFD_ASSERT (p->size == input_section->_raw_size);
5245 
5246 	      /* The ECOFF linking code expects that we have already
5247 		 read in the debugging information and set up an
5248 		 ecoff_debug_info structure, so we do that now.  */
5249 	      if (!elf64_alpha_read_ecoff_info (input_bfd, input_section,
5250 						&input_debug))
5251 		return FALSE;
5252 
5253 	      if (! (bfd_ecoff_debug_accumulate
5254 		     (mdebug_handle, abfd, &debug, swap, input_bfd,
5255 		      &input_debug, input_swap, info)))
5256 		return FALSE;
5257 
5258 	      /* Loop through the external symbols.  For each one with
5259 		 interesting information, try to find the symbol in
5260 		 the linker global hash table and save the information
5261 		 for the output external symbols.  */
5262 	      eraw_src = input_debug.external_ext;
5263 	      eraw_end = (eraw_src
5264 			  + (input_debug.symbolic_header.iextMax
5265 			     * input_swap->external_ext_size));
5266 	      for (;
5267 		   eraw_src < eraw_end;
5268 		   eraw_src += input_swap->external_ext_size)
5269 		{
5270 		  EXTR ext;
5271 		  const char *name;
5272 		  struct alpha_elf_link_hash_entry *h;
5273 
5274 		  (*input_swap->swap_ext_in) (input_bfd, (PTR) eraw_src, &ext);
5275 		  if (ext.asym.sc == scNil
5276 		      || ext.asym.sc == scUndefined
5277 		      || ext.asym.sc == scSUndefined)
5278 		    continue;
5279 
5280 		  name = input_debug.ssext + ext.asym.iss;
5281 		  h = alpha_elf_link_hash_lookup (alpha_elf_hash_table (info),
5282 						  name, FALSE, FALSE, TRUE);
5283 		  if (h == NULL || h->esym.ifd != -2)
5284 		    continue;
5285 
5286 		  if (ext.ifd != -1)
5287 		    {
5288 		      BFD_ASSERT (ext.ifd
5289 				  < input_debug.symbolic_header.ifdMax);
5290 		      ext.ifd = input_debug.ifdmap[ext.ifd];
5291 		    }
5292 
5293 		  h->esym = ext;
5294 		}
5295 
5296 	      /* Free up the information we just read.  */
5297 	      free (input_debug.line);
5298 	      free (input_debug.external_dnr);
5299 	      free (input_debug.external_pdr);
5300 	      free (input_debug.external_sym);
5301 	      free (input_debug.external_opt);
5302 	      free (input_debug.external_aux);
5303 	      free (input_debug.ss);
5304 	      free (input_debug.ssext);
5305 	      free (input_debug.external_fdr);
5306 	      free (input_debug.external_rfd);
5307 	      free (input_debug.external_ext);
5308 
5309 	      /* Hack: reset the SEC_HAS_CONTENTS flag so that
5310 		 elf_link_input_bfd ignores this section.  */
5311 	      input_section->flags &=~ SEC_HAS_CONTENTS;
5312 	    }
5313 
5314 	  /* Build the external symbol information.  */
5315 	  einfo.abfd = abfd;
5316 	  einfo.info = info;
5317 	  einfo.debug = &debug;
5318 	  einfo.swap = swap;
5319 	  einfo.failed = FALSE;
5320 	  elf_link_hash_traverse (elf_hash_table (info),
5321 				  elf64_alpha_output_extsym,
5322 				  (PTR) &einfo);
5323 	  if (einfo.failed)
5324 	    return FALSE;
5325 
5326 	  /* Set the size of the .mdebug section.  */
5327 	  o->_raw_size = bfd_ecoff_debug_size (abfd, &debug, swap);
5328 
5329 	  /* Skip this section later on (I don't think this currently
5330 	     matters, but someday it might).  */
5331 	  o->link_order_head = (struct bfd_link_order *) NULL;
5332 
5333 	  mdebug_sec = o;
5334 	}
5335     }
5336 
5337   /* Invoke the regular ELF backend linker to do all the work.  */
5338   if (! bfd_elf_final_link (abfd, info))
5339     return FALSE;
5340 
5341   /* Now write out the computed sections.  */
5342 
5343   /* The .got subsections...  */
5344   {
5345     bfd *i, *dynobj = elf_hash_table(info)->dynobj;
5346     for (i = alpha_elf_hash_table(info)->got_list;
5347 	 i != NULL;
5348 	 i = alpha_elf_tdata(i)->got_link_next)
5349       {
5350 	asection *sgot;
5351 
5352 	/* elf_bfd_final_link already did everything in dynobj.  */
5353 	if (i == dynobj)
5354 	  continue;
5355 
5356 	sgot = alpha_elf_tdata(i)->got;
5357 	if (! bfd_set_section_contents (abfd, sgot->output_section,
5358 					sgot->contents,
5359 					(file_ptr) sgot->output_offset,
5360 					sgot->_raw_size))
5361 	  return FALSE;
5362       }
5363   }
5364 
5365   if (mdebug_sec != (asection *) NULL)
5366     {
5367       BFD_ASSERT (abfd->output_has_begun);
5368       if (! bfd_ecoff_write_accumulated_debug (mdebug_handle, abfd, &debug,
5369 					       swap, info,
5370 					       mdebug_sec->filepos))
5371 	return FALSE;
5372 
5373       bfd_ecoff_debug_free (mdebug_handle, abfd, &debug, swap, info);
5374     }
5375 
5376   return TRUE;
5377 }
5378 
5379 static enum elf_reloc_type_class
elf64_alpha_reloc_type_class(rela)5380 elf64_alpha_reloc_type_class (rela)
5381      const Elf_Internal_Rela *rela;
5382 {
5383   switch ((int) ELF64_R_TYPE (rela->r_info))
5384     {
5385     case R_ALPHA_RELATIVE:
5386       return reloc_class_relative;
5387     case R_ALPHA_JMP_SLOT:
5388       return reloc_class_plt;
5389     case R_ALPHA_COPY:
5390       return reloc_class_copy;
5391     default:
5392       return reloc_class_normal;
5393     }
5394 }
5395 
5396 static struct bfd_elf_special_section const elf64_alpha_special_sections[]=
5397 {
5398   { ".sdata", 6, -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_ALPHA_GPREL },
5399   { ".sbss",  5, -2, SHT_NOBITS,   SHF_ALLOC + SHF_WRITE + SHF_ALPHA_GPREL },
5400   { NULL,     0,  0, 0,            0 }
5401 };
5402 
5403 /* ECOFF swapping routines.  These are used when dealing with the
5404    .mdebug section, which is in the ECOFF debugging format.  Copied
5405    from elf32-mips.c.  */
5406 static const struct ecoff_debug_swap
5407 elf64_alpha_ecoff_debug_swap =
5408 {
5409   /* Symbol table magic number.  */
5410   magicSym2,
5411   /* Alignment of debugging information.  E.g., 4.  */
5412   8,
5413   /* Sizes of external symbolic information.  */
5414   sizeof (struct hdr_ext),
5415   sizeof (struct dnr_ext),
5416   sizeof (struct pdr_ext),
5417   sizeof (struct sym_ext),
5418   sizeof (struct opt_ext),
5419   sizeof (struct fdr_ext),
5420   sizeof (struct rfd_ext),
5421   sizeof (struct ext_ext),
5422   /* Functions to swap in external symbolic data.  */
5423   ecoff_swap_hdr_in,
5424   ecoff_swap_dnr_in,
5425   ecoff_swap_pdr_in,
5426   ecoff_swap_sym_in,
5427   ecoff_swap_opt_in,
5428   ecoff_swap_fdr_in,
5429   ecoff_swap_rfd_in,
5430   ecoff_swap_ext_in,
5431   _bfd_ecoff_swap_tir_in,
5432   _bfd_ecoff_swap_rndx_in,
5433   /* Functions to swap out external symbolic data.  */
5434   ecoff_swap_hdr_out,
5435   ecoff_swap_dnr_out,
5436   ecoff_swap_pdr_out,
5437   ecoff_swap_sym_out,
5438   ecoff_swap_opt_out,
5439   ecoff_swap_fdr_out,
5440   ecoff_swap_rfd_out,
5441   ecoff_swap_ext_out,
5442   _bfd_ecoff_swap_tir_out,
5443   _bfd_ecoff_swap_rndx_out,
5444   /* Function to read in symbolic data.  */
5445   elf64_alpha_read_ecoff_info
5446 };
5447 
5448 /* Use a non-standard hash bucket size of 8.  */
5449 
5450 static const struct elf_size_info alpha_elf_size_info =
5451 {
5452   sizeof (Elf64_External_Ehdr),
5453   sizeof (Elf64_External_Phdr),
5454   sizeof (Elf64_External_Shdr),
5455   sizeof (Elf64_External_Rel),
5456   sizeof (Elf64_External_Rela),
5457   sizeof (Elf64_External_Sym),
5458   sizeof (Elf64_External_Dyn),
5459   sizeof (Elf_External_Note),
5460   8,
5461   1,
5462   64, 3,
5463   ELFCLASS64, EV_CURRENT,
5464   bfd_elf64_write_out_phdrs,
5465   bfd_elf64_write_shdrs_and_ehdr,
5466   bfd_elf64_write_relocs,
5467   bfd_elf64_swap_symbol_in,
5468   bfd_elf64_swap_symbol_out,
5469   bfd_elf64_slurp_reloc_table,
5470   bfd_elf64_slurp_symbol_table,
5471   bfd_elf64_swap_dyn_in,
5472   bfd_elf64_swap_dyn_out,
5473   bfd_elf64_swap_reloc_in,
5474   bfd_elf64_swap_reloc_out,
5475   bfd_elf64_swap_reloca_in,
5476   bfd_elf64_swap_reloca_out
5477 };
5478 
5479 #define TARGET_LITTLE_SYM	bfd_elf64_alpha_vec
5480 #define TARGET_LITTLE_NAME	"elf64-alpha"
5481 #define ELF_ARCH		bfd_arch_alpha
5482 #define ELF_MACHINE_CODE	EM_ALPHA
5483 #define ELF_MAXPAGESIZE	0x10000
5484 
5485 #define bfd_elf64_bfd_link_hash_table_create \
5486   elf64_alpha_bfd_link_hash_table_create
5487 
5488 #define bfd_elf64_bfd_reloc_type_lookup \
5489   elf64_alpha_bfd_reloc_type_lookup
5490 #define elf_info_to_howto \
5491   elf64_alpha_info_to_howto
5492 
5493 #define bfd_elf64_mkobject \
5494   elf64_alpha_mkobject
5495 #define elf_backend_object_p \
5496   elf64_alpha_object_p
5497 
5498 #define elf_backend_section_from_shdr \
5499   elf64_alpha_section_from_shdr
5500 #define elf_backend_section_flags \
5501   elf64_alpha_section_flags
5502 #define elf_backend_fake_sections \
5503   elf64_alpha_fake_sections
5504 
5505 #define bfd_elf64_bfd_is_local_label_name \
5506   elf64_alpha_is_local_label_name
5507 #define bfd_elf64_find_nearest_line \
5508   elf64_alpha_find_nearest_line
5509 #define bfd_elf64_bfd_relax_section \
5510   elf64_alpha_relax_section
5511 
5512 #define elf_backend_add_symbol_hook \
5513   elf64_alpha_add_symbol_hook
5514 #define elf_backend_check_relocs \
5515   elf64_alpha_check_relocs
5516 #define elf_backend_create_dynamic_sections \
5517   elf64_alpha_create_dynamic_sections
5518 #define elf_backend_adjust_dynamic_symbol \
5519   elf64_alpha_adjust_dynamic_symbol
5520 #define elf_backend_always_size_sections \
5521   elf64_alpha_always_size_sections
5522 #define elf_backend_size_dynamic_sections \
5523   elf64_alpha_size_dynamic_sections
5524 #define elf_backend_relocate_section \
5525   elf64_alpha_relocate_section
5526 #define elf_backend_finish_dynamic_symbol \
5527   elf64_alpha_finish_dynamic_symbol
5528 #define elf_backend_finish_dynamic_sections \
5529   elf64_alpha_finish_dynamic_sections
5530 #define bfd_elf64_bfd_final_link \
5531   elf64_alpha_final_link
5532 #define elf_backend_reloc_type_class \
5533   elf64_alpha_reloc_type_class
5534 
5535 #define elf_backend_ecoff_debug_swap \
5536   &elf64_alpha_ecoff_debug_swap
5537 
5538 #define elf_backend_size_info \
5539   alpha_elf_size_info
5540 
5541 #define elf_backend_special_sections \
5542   elf64_alpha_special_sections
5543 
5544 /* A few constants that determine how the .plt section is set up.  */
5545 #define elf_backend_want_got_plt 0
5546 #define elf_backend_plt_readonly 0
5547 #define elf_backend_want_plt_sym 1
5548 #define elf_backend_got_header_size 0
5549 
5550 #include "elf64-target.h"
5551 
5552 /* FreeBSD support.  */
5553 
5554 #undef TARGET_LITTLE_SYM
5555 #define TARGET_LITTLE_SYM	bfd_elf64_alpha_freebsd_vec
5556 #undef TARGET_LITTLE_NAME
5557 #define TARGET_LITTLE_NAME	"elf64-alpha-freebsd"
5558 
5559 /* The kernel recognizes executables as valid only if they carry a
5560    "FreeBSD" label in the ELF header.  So we put this label on all
5561    executables and (for simplicity) also all other object files.  */
5562 
5563 static void elf64_alpha_fbsd_post_process_headers
5564   PARAMS ((bfd *, struct bfd_link_info *));
5565 
5566 static void
elf64_alpha_fbsd_post_process_headers(abfd,link_info)5567 elf64_alpha_fbsd_post_process_headers (abfd, link_info)
5568      bfd * abfd;
5569      struct bfd_link_info * link_info ATTRIBUTE_UNUSED;
5570 {
5571   Elf_Internal_Ehdr * i_ehdrp;	/* ELF file header, internal form.  */
5572 
5573   i_ehdrp = elf_elfheader (abfd);
5574 
5575   /* Put an ABI label supported by FreeBSD >= 4.1.  */
5576   i_ehdrp->e_ident[EI_OSABI] = ELFOSABI_FREEBSD;
5577 #ifdef OLD_FREEBSD_ABI_LABEL
5578   /* The ABI label supported by FreeBSD <= 4.0 is quite nonstandard.  */
5579   memcpy (&i_ehdrp->e_ident[EI_ABIVERSION], "FreeBSD", 8);
5580 #endif
5581 }
5582 
5583 #undef elf_backend_post_process_headers
5584 #define elf_backend_post_process_headers \
5585   elf64_alpha_fbsd_post_process_headers
5586 
5587 #undef  elf64_bed
5588 #define elf64_bed elf64_alpha_fbsd_bed
5589 
5590 #include "elf64-target.h"
5591