1 /* CRIS-specific support for 32-bit ELF.
2    Copyright (C) 2000-2016 Free Software Foundation, Inc.
3    Contributed by Axis Communications AB.
4    Written by Hans-Peter Nilsson, based on elf32-fr30.c
5    PIC and shlib bits based primarily on elf32-m68k.c and elf32-i386.c.
6 
7    This file is part of BFD, the Binary File Descriptor library.
8 
9    This program is free software; you can redistribute it and/or modify
10    it under the terms of the GNU General Public License as published by
11    the Free Software Foundation; either version 3 of the License, or
12    (at your option) any later version.
13 
14    This program is distributed in the hope that it will be useful,
15    but WITHOUT ANY WARRANTY; without even the implied warranty of
16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
17    GNU General Public License for more details.
18 
19    You should have received a copy of the GNU General Public License
20    along with this program; if not, write to the Free Software
21    Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
22    MA 02110-1301, USA.  */
23 
24 #include "sysdep.h"
25 #include "bfd.h"
26 #include "libbfd.h"
27 #include "elf-bfd.h"
28 #include "elf/cris.h"
29 #include <limits.h>
30 
31 bfd_reloc_status_type
32 cris_elf_pcrel_reloc (bfd *, arelent *, asymbol *, void *,
33 		      asection *, bfd *, char **);
34 static bfd_boolean
35 cris_elf_set_mach_from_flags (bfd *, unsigned long);
36 
37 /* Forward declarations.  */
38 static reloc_howto_type cris_elf_howto_table [] =
39 {
40   /* This reloc does nothing.  */
41   HOWTO (R_CRIS_NONE,		/* type */
42 	 0,			/* rightshift */
43 	 3,			/* size (0 = byte, 1 = short, 2 = long) */
44 	 0,			/* bitsize */
45 	 FALSE,			/* pc_relative */
46 	 0,			/* bitpos */
47 	 complain_overflow_dont, /* complain_on_overflow */
48 	 bfd_elf_generic_reloc,	/* special_function */
49 	 "R_CRIS_NONE",		/* name */
50 	 FALSE,			/* partial_inplace */
51 	 0,			/* src_mask */
52 	 0,			/* dst_mask */
53 	 FALSE),		/* pcrel_offset */
54 
55   /* An 8 bit absolute relocation.  */
56   HOWTO (R_CRIS_8,		/* type */
57 	 0,			/* rightshift */
58 	 0,			/* size (0 = byte, 1 = short, 2 = long) */
59 	 8,			/* bitsize */
60 	 FALSE,			/* pc_relative */
61 	 0,			/* bitpos */
62 	 complain_overflow_bitfield, /* complain_on_overflow */
63 	 bfd_elf_generic_reloc,	/* special_function */
64 	 "R_CRIS_8",		/* name */
65 	 FALSE,			/* partial_inplace */
66 	 0x0000,		/* src_mask */
67 	 0x00ff,		/* dst_mask */
68 	 FALSE),		/* pcrel_offset */
69 
70   /* A 16 bit absolute relocation.  */
71   HOWTO (R_CRIS_16,		/* type */
72 	 0,			/* rightshift */
73 	 1,			/* size (0 = byte, 1 = short, 2 = long) */
74 	 16,			/* bitsize */
75 	 FALSE,			/* pc_relative */
76 	 0,			/* bitpos */
77 	 complain_overflow_bitfield, /* complain_on_overflow */
78 	 bfd_elf_generic_reloc,	/* special_function */
79 	 "R_CRIS_16",		/* name */
80 	 FALSE,			/* partial_inplace */
81 	 0x00000000,		/* src_mask */
82 	 0x0000ffff,		/* dst_mask */
83 	 FALSE),		/* pcrel_offset */
84 
85   /* A 32 bit absolute relocation.  */
86   HOWTO (R_CRIS_32,		/* type */
87 	 0,			/* rightshift */
88 	 2,			/* size (0 = byte, 1 = short, 2 = long) */
89 	 32,			/* bitsize */
90 	 FALSE,			/* pc_relative */
91 	 0,			/* bitpos */
92 	 /* We don't want overflow complaints for 64-bit vma builds
93 	    for e.g. sym+0x40000000 (or actually sym-0xc0000000 in
94 	    32-bit ELF) where sym=0xc0001234.
95 	    Don't do this for the PIC relocs, as we don't expect to
96 	    see them with large offsets.  */
97 	 complain_overflow_dont, /* complain_on_overflow */
98 	 bfd_elf_generic_reloc,	/* special_function */
99 	 "R_CRIS_32",		/* name */
100 	 FALSE,			/* partial_inplace */
101 	 0x00000000,		/* src_mask */
102 	 0xffffffff,		/* dst_mask */
103 	 FALSE),		/* pcrel_offset */
104 
105   /* An 8 bit PC-relative relocation.  */
106   HOWTO (R_CRIS_8_PCREL,	/* type */
107 	 0,			/* rightshift */
108 	 0,			/* size (0 = byte, 1 = short, 2 = long) */
109 	 8,			/* bitsize */
110 	 TRUE,			/* pc_relative */
111 	 0,			/* bitpos */
112 	 complain_overflow_bitfield, /* complain_on_overflow */
113 	 cris_elf_pcrel_reloc,	/* special_function */
114 	 "R_CRIS_8_PCREL",	/* name */
115 	 FALSE,			/* partial_inplace */
116 	 0x0000,		/* src_mask */
117 	 0x00ff,		/* dst_mask */
118 	 TRUE),			/* pcrel_offset */
119 
120   /* A 16 bit PC-relative relocation.  */
121   HOWTO (R_CRIS_16_PCREL,	/* type */
122 	 0,			/* rightshift */
123 	 1,			/* size (0 = byte, 1 = short, 2 = long) */
124 	 16,			/* bitsize */
125 	 TRUE,			/* pc_relative */
126 	 0,			/* bitpos */
127 	 complain_overflow_bitfield, /* complain_on_overflow */
128 	 cris_elf_pcrel_reloc,	/* special_function */
129 	 "R_CRIS_16_PCREL",	/* name */
130 	 FALSE,			/* partial_inplace */
131 	 0x00000000,		/* src_mask */
132 	 0x0000ffff,		/* dst_mask */
133 	 TRUE),			/* pcrel_offset */
134 
135   /* A 32 bit PC-relative relocation.  */
136   HOWTO (R_CRIS_32_PCREL,	/* type */
137 	 0,			/* rightshift */
138 	 2,			/* size (0 = byte, 1 = short, 2 = long) */
139 	 32,			/* bitsize */
140 	 TRUE,			/* pc_relative */
141 	 0,			/* bitpos */
142 	 complain_overflow_bitfield, /* complain_on_overflow */
143 	 cris_elf_pcrel_reloc,	/* special_function */
144 	 "R_CRIS_32_PCREL",	/* name */
145 	 FALSE,			/* partial_inplace */
146 	 0x00000000,		/* src_mask */
147 	 0xffffffff,		/* dst_mask */
148 	 TRUE),			/* pcrel_offset */
149 
150   /* GNU extension to record C++ vtable hierarchy.  */
151   HOWTO (R_CRIS_GNU_VTINHERIT,	/* type */
152 	 0,			/* rightshift */
153 	 2,			/* size (0 = byte, 1 = short, 2 = long) */
154 	 0,			/* bitsize */
155 	 FALSE,			/* pc_relative */
156 	 0,			/* bitpos */
157 	 complain_overflow_dont, /* complain_on_overflow */
158 	 NULL,			/* special_function */
159 	 "R_CRIS_GNU_VTINHERIT", /* name */
160 	 FALSE,			/* partial_inplace */
161 	 0,			/* src_mask */
162 	 0,			/* dst_mask */
163 	 FALSE),		/* pcrel_offset */
164 
165   /* GNU extension to record C++ vtable member usage.  */
166   HOWTO (R_CRIS_GNU_VTENTRY,	/* type */
167 	 0,			/* rightshift */
168 	 2,			/* size (0 = byte, 1 = short, 2 = long) */
169 	 0,			/* bitsize */
170 	 FALSE,			/* pc_relative */
171 	 0,			/* bitpos */
172 	 complain_overflow_dont, /* complain_on_overflow */
173 	 _bfd_elf_rel_vtable_reloc_fn,	/* special_function */
174 	 "R_CRIS_GNU_VTENTRY",	 /* name */
175 	 FALSE,			/* partial_inplace */
176 	 0,			/* src_mask */
177 	 0,			/* dst_mask */
178 	 FALSE),		/* pcrel_offset */
179 
180   /* This is used only by the dynamic linker.  The symbol should exist
181      both in the object being run and in some shared library.  The
182      dynamic linker copies the data addressed by the symbol from the
183      shared library into the object, because the object being
184      run has to have the data at some particular address.  */
185   HOWTO (R_CRIS_COPY,		/* type */
186 	 0,			/* rightshift */
187 	 2,			/* size (0 = byte, 1 = short, 2 = long) */
188 	 32,			/* bitsize */
189 	 FALSE,			/* pc_relative */
190 	 0,			/* bitpos */
191 	 complain_overflow_bitfield, /* complain_on_overflow */
192 	 bfd_elf_generic_reloc,	/* special_function */
193 	 "R_CRIS_COPY",		/* name */
194 	 FALSE,			/* partial_inplace */
195 	 0,			/* src_mask */
196 	 0,			/* dst_mask */
197 	 FALSE),		/* pcrel_offset */
198 
199   /* Like R_CRIS_32, but used when setting global offset table entries.  */
200   HOWTO (R_CRIS_GLOB_DAT,	/* type */
201 	 0,			/* rightshift */
202 	 2,			/* size (0 = byte, 1 = short, 2 = long) */
203 	 32,			/* bitsize */
204 	 FALSE,			/* pc_relative */
205 	 0,			/* bitpos */
206 	 complain_overflow_bitfield, /* complain_on_overflow */
207 	 bfd_elf_generic_reloc,	/* special_function */
208 	 "R_CRIS_GLOB_DAT",	/* name */
209 	 FALSE,			/* partial_inplace */
210 	 0,			/* src_mask */
211 	 0xffffffff,		/* dst_mask */
212 	 FALSE),		/* pcrel_offset */
213 
214   /* Marks a procedure linkage table entry for a symbol.  */
215   HOWTO (R_CRIS_JUMP_SLOT,	/* type */
216 	 0,			/* rightshift */
217 	 2,			/* size (0 = byte, 1 = short, 2 = long) */
218 	 32,			/* bitsize */
219 	 FALSE,			/* pc_relative */
220 	 0,			/* bitpos */
221 	 complain_overflow_bitfield, /* complain_on_overflow */
222 	 bfd_elf_generic_reloc,	/* special_function */
223 	 "R_CRIS_JUMP_SLOT",	/* name */
224 	 FALSE,			/* partial_inplace */
225 	 0,			/* src_mask */
226 	 0,			/* dst_mask */
227 	 FALSE),		/* pcrel_offset */
228 
229   /* Used only by the dynamic linker.  When the object is run, this
230      longword is set to the load address of the object, plus the
231      addend.  */
232   HOWTO (R_CRIS_RELATIVE,	/* type */
233 	 0,			/* rightshift */
234 	 2,			/* size (0 = byte, 1 = short, 2 = long) */
235 	 32,			/* bitsize */
236 	 FALSE,			/* pc_relative */
237 	 0,			/* bitpos */
238 	 complain_overflow_bitfield, /* complain_on_overflow */
239 	 bfd_elf_generic_reloc,	/* special_function */
240 	 "R_CRIS_RELATIVE",	/* name */
241 	 FALSE,			/* partial_inplace */
242 	 0,			/* src_mask */
243 	 0xffffffff,		/* dst_mask */
244 	 FALSE),		/* pcrel_offset */
245 
246   /* Like R_CRIS_32, but referring to the GOT table entry for the symbol.  */
247   HOWTO (R_CRIS_16_GOT,		/* type */
248 	 0,			/* rightshift */
249 	 1,			/* size (0 = byte, 1 = short, 2 = long) */
250 	 16,			/* bitsize */
251 	 FALSE,			/* pc_relative */
252 	 0,			/* bitpos */
253 	 complain_overflow_bitfield, /* complain_on_overflow */
254 	 bfd_elf_generic_reloc,	/* special_function */
255 	 "R_CRIS_16_GOT",	/* name */
256 	 FALSE,			/* partial_inplace */
257 	 0,			/* src_mask */
258 	 0xffff,		/* dst_mask */
259 	 FALSE),		/* pcrel_offset */
260 
261   HOWTO (R_CRIS_32_GOT,		/* type */
262 	 0,			/* rightshift */
263 	 2,			/* size (0 = byte, 1 = short, 2 = long) */
264 	 32,			/* bitsize */
265 	 FALSE,			/* pc_relative */
266 	 0,			/* bitpos */
267 	 complain_overflow_bitfield, /* complain_on_overflow */
268 	 bfd_elf_generic_reloc,	/* special_function */
269 	 "R_CRIS_32_GOT",	/* name */
270 	 FALSE,			/* partial_inplace */
271 	 0,			/* src_mask */
272 	 0xffffffff,		/* dst_mask */
273 	 FALSE),		/* pcrel_offset */
274 
275   /* Like R_CRIS_32_GOT, but referring to (and requesting a) PLT part of
276      the GOT table for the symbol.  */
277   HOWTO (R_CRIS_16_GOTPLT,	/* type */
278 	 0,			/* rightshift */
279 	 1,			/* size (0 = byte, 1 = short, 2 = long) */
280 	 16,			/* bitsize */
281 	 FALSE,			/* pc_relative */
282 	 0,			/* bitpos */
283 	 complain_overflow_bitfield, /* complain_on_overflow */
284 	 bfd_elf_generic_reloc,	/* special_function */
285 	 "R_CRIS_16_GOTPLT",	/* name */
286 	 FALSE,			/* partial_inplace */
287 	 0,			/* src_mask */
288 	 0xffff,		/* dst_mask */
289 	 FALSE),		/* pcrel_offset */
290 
291   HOWTO (R_CRIS_32_GOTPLT,	/* type */
292 	 0,			/* rightshift */
293 	 2,			/* size (0 = byte, 1 = short, 2 = long) */
294 	 32,			/* bitsize */
295 	 FALSE,			/* pc_relative */
296 	 0,			/* bitpos */
297 	 complain_overflow_bitfield, /* complain_on_overflow */
298 	 bfd_elf_generic_reloc,	/* special_function */
299 	 "R_CRIS_32_GOTPLT",	/* name */
300 	 FALSE,			/* partial_inplace */
301 	 0,			/* src_mask */
302 	 0xffffffff,		/* dst_mask */
303 	 FALSE),		/* pcrel_offset */
304 
305   /* A 32-bit offset from GOT to (local const) symbol: no GOT entry should
306      be necessary.  */
307   HOWTO (R_CRIS_32_GOTREL,	/* type */
308 	 0,			/* rightshift */
309 	 2,			/* size (0 = byte, 1 = short, 2 = long) */
310 	 32,			/* bitsize */
311 	 FALSE,			/* pc_relative */
312 	 0,			/* bitpos */
313 	 complain_overflow_bitfield, /* complain_on_overflow */
314 	 bfd_elf_generic_reloc,	/* special_function */
315 	 "R_CRIS_32_GOTREL",	/* name */
316 	 FALSE,			/* partial_inplace */
317 	 0,			/* src_mask */
318 	 0xffffffff,		/* dst_mask */
319 	 FALSE),		/* pcrel_offset */
320 
321   /* A 32-bit offset from GOT to entry for this symbol in PLT and request
322      to create PLT entry for symbol.  */
323   HOWTO (R_CRIS_32_PLT_GOTREL,	/* type */
324 	 0,			/* rightshift */
325 	 2,			/* size (0 = byte, 1 = short, 2 = long) */
326 	 32,			/* bitsize */
327 	 FALSE,			/* pc_relative */
328 	 0,			/* bitpos */
329 	 complain_overflow_bitfield, /* complain_on_overflow */
330 	 bfd_elf_generic_reloc,	/* special_function */
331 	 "R_CRIS_32_PLT_GOTREL", /* name */
332 	 FALSE,			/* partial_inplace */
333 	 0,			/* src_mask */
334 	 0xffffffff,		/* dst_mask */
335 	 FALSE),		/* pcrel_offset */
336 
337   /* A 32-bit offset from PC (location after the relocation) + addend to
338      entry for this symbol in PLT and request to create PLT entry for
339      symbol.  */
340   HOWTO (R_CRIS_32_PLT_PCREL,	/* type */
341 	 0,			/* rightshift */
342 	 2,			/* size (0 = byte, 1 = short, 2 = long) */
343 	 32,			/* bitsize */
344 	 TRUE,			/* pc_relative */
345 	 0,			/* bitpos */
346 	 complain_overflow_bitfield, /* complain_on_overflow */
347 	 cris_elf_pcrel_reloc,	/* special_function */
348 	 "R_CRIS_32_PLT_PCREL",	/* name */
349 	 FALSE,			/* partial_inplace */
350 	 0,			/* src_mask */
351 	 0xffffffff,		/* dst_mask */
352 	 TRUE),			/* pcrel_offset */
353 
354   /* We don't handle these in any special manner and cross-format
355      linking is not supported; just recognize them enough to pass them
356      around.  FIXME: do the same for most PIC relocs and add sanity
357      tests to actually refuse gracefully to handle these and PIC
358      relocs for cross-format linking.  */
359 #define TLSHOWTO32(name) \
360  HOWTO (name, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, \
361         bfd_elf_generic_reloc, #name, FALSE, 0, 0xffffffff, FALSE)
362 #define TLSHOWTO16X(name, X)	     \
363  HOWTO (name, 0, 1, 16, FALSE, 0, complain_overflow_ ## X, \
364         bfd_elf_generic_reloc, #name, FALSE, 0, 0xffff, FALSE)
365 #define TLSHOWTO16(name) TLSHOWTO16X(name, unsigned)
366 #define TLSHOWTO16S(name) TLSHOWTO16X(name, signed)
367 
368   TLSHOWTO32 (R_CRIS_32_GOT_GD),
369   TLSHOWTO16 (R_CRIS_16_GOT_GD),
370   TLSHOWTO32 (R_CRIS_32_GD),
371   TLSHOWTO32 (R_CRIS_DTP),
372   TLSHOWTO32 (R_CRIS_32_DTPREL),
373   TLSHOWTO16S (R_CRIS_16_DTPREL),
374   TLSHOWTO32 (R_CRIS_32_GOT_TPREL),
375   TLSHOWTO16S (R_CRIS_16_GOT_TPREL),
376   TLSHOWTO32 (R_CRIS_32_TPREL),
377   TLSHOWTO16S (R_CRIS_16_TPREL),
378   TLSHOWTO32 (R_CRIS_DTPMOD),
379   TLSHOWTO32 (R_CRIS_32_IE)
380 };
381 
382 /* Map BFD reloc types to CRIS ELF reloc types.  */
383 
384 struct cris_reloc_map
385 {
386   bfd_reloc_code_real_type bfd_reloc_val;
387   unsigned int cris_reloc_val;
388 };
389 
390 static const struct cris_reloc_map cris_reloc_map [] =
391 {
392   { BFD_RELOC_NONE,		R_CRIS_NONE },
393   { BFD_RELOC_8,		R_CRIS_8 },
394   { BFD_RELOC_16,		R_CRIS_16 },
395   { BFD_RELOC_32,		R_CRIS_32 },
396   { BFD_RELOC_8_PCREL,		R_CRIS_8_PCREL },
397   { BFD_RELOC_16_PCREL,		R_CRIS_16_PCREL },
398   { BFD_RELOC_32_PCREL,		R_CRIS_32_PCREL },
399   { BFD_RELOC_VTABLE_INHERIT,	R_CRIS_GNU_VTINHERIT },
400   { BFD_RELOC_VTABLE_ENTRY,	R_CRIS_GNU_VTENTRY },
401   { BFD_RELOC_CRIS_COPY,	R_CRIS_COPY },
402   { BFD_RELOC_CRIS_GLOB_DAT,	R_CRIS_GLOB_DAT },
403   { BFD_RELOC_CRIS_JUMP_SLOT,	R_CRIS_JUMP_SLOT },
404   { BFD_RELOC_CRIS_RELATIVE,	R_CRIS_RELATIVE },
405   { BFD_RELOC_CRIS_16_GOT,	R_CRIS_16_GOT },
406   { BFD_RELOC_CRIS_32_GOT,	R_CRIS_32_GOT },
407   { BFD_RELOC_CRIS_16_GOTPLT,	R_CRIS_16_GOTPLT },
408   { BFD_RELOC_CRIS_32_GOTPLT,	R_CRIS_32_GOTPLT },
409   { BFD_RELOC_CRIS_32_GOTREL,	R_CRIS_32_GOTREL },
410   { BFD_RELOC_CRIS_32_PLT_GOTREL, R_CRIS_32_PLT_GOTREL },
411   { BFD_RELOC_CRIS_32_PLT_PCREL, R_CRIS_32_PLT_PCREL },
412   { BFD_RELOC_CRIS_32_GOT_GD,	R_CRIS_32_GOT_GD },
413   { BFD_RELOC_CRIS_16_GOT_GD,	R_CRIS_16_GOT_GD },
414   { BFD_RELOC_CRIS_32_GD,	R_CRIS_32_GD },
415   { BFD_RELOC_CRIS_DTP,	R_CRIS_DTP },
416   { BFD_RELOC_CRIS_32_DTPREL,	R_CRIS_32_DTPREL },
417   { BFD_RELOC_CRIS_16_DTPREL,	R_CRIS_16_DTPREL },
418   { BFD_RELOC_CRIS_32_GOT_TPREL, R_CRIS_32_GOT_TPREL },
419   { BFD_RELOC_CRIS_16_GOT_TPREL, R_CRIS_16_GOT_TPREL },
420   { BFD_RELOC_CRIS_32_TPREL,	R_CRIS_32_TPREL },
421   { BFD_RELOC_CRIS_16_TPREL,	R_CRIS_16_TPREL },
422   { BFD_RELOC_CRIS_DTPMOD,	R_CRIS_DTPMOD },
423   { BFD_RELOC_CRIS_32_IE,	R_CRIS_32_IE }
424 };
425 
426 static reloc_howto_type *
cris_reloc_type_lookup(bfd * abfd ATTRIBUTE_UNUSED,bfd_reloc_code_real_type code)427 cris_reloc_type_lookup (bfd * abfd ATTRIBUTE_UNUSED,
428 			bfd_reloc_code_real_type code)
429 {
430   unsigned int i;
431 
432   for (i = 0; i < sizeof (cris_reloc_map) / sizeof (cris_reloc_map[0]); i++)
433     if (cris_reloc_map [i].bfd_reloc_val == code)
434       return & cris_elf_howto_table [cris_reloc_map[i].cris_reloc_val];
435 
436   return NULL;
437 }
438 
439 static reloc_howto_type *
cris_reloc_name_lookup(bfd * abfd ATTRIBUTE_UNUSED,const char * r_name)440 cris_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, const char *r_name)
441 {
442   unsigned int i;
443 
444   for (i = 0;
445        i < sizeof (cris_elf_howto_table) / sizeof (cris_elf_howto_table[0]);
446        i++)
447     if (cris_elf_howto_table[i].name != NULL
448 	&& strcasecmp (cris_elf_howto_table[i].name, r_name) == 0)
449       return &cris_elf_howto_table[i];
450 
451   return NULL;
452 }
453 
454 /* Set the howto pointer for an CRIS ELF reloc.  */
455 
456 static void
cris_info_to_howto_rela(bfd * abfd ATTRIBUTE_UNUSED,arelent * cache_ptr,Elf_Internal_Rela * dst)457 cris_info_to_howto_rela (bfd * abfd ATTRIBUTE_UNUSED,
458 			 arelent * cache_ptr,
459 			 Elf_Internal_Rela * dst)
460 {
461   enum elf_cris_reloc_type r_type;
462 
463   r_type = ELF32_R_TYPE (dst->r_info);
464   if (r_type >= R_CRIS_max)
465     {
466       _bfd_error_handler (_("%B: invalid CRIS reloc number: %d"), abfd, r_type);
467       r_type = 0;
468     }
469   cache_ptr->howto = & cris_elf_howto_table [r_type];
470 }
471 
472 bfd_reloc_status_type
cris_elf_pcrel_reloc(bfd * abfd ATTRIBUTE_UNUSED,arelent * reloc_entry,asymbol * symbol,void * data ATTRIBUTE_UNUSED,asection * input_section,bfd * output_bfd,char ** error_message ATTRIBUTE_UNUSED)473 cris_elf_pcrel_reloc (bfd *abfd ATTRIBUTE_UNUSED,
474 		      arelent *reloc_entry,
475 		      asymbol *symbol,
476 		      void * data ATTRIBUTE_UNUSED,
477 		      asection *input_section,
478 		      bfd *output_bfd,
479 		      char **error_message ATTRIBUTE_UNUSED)
480 {
481   /* By default (using only bfd_elf_generic_reloc when linking to
482      non-ELF formats) PC-relative relocs are relative to the beginning
483      of the reloc.  CRIS PC-relative relocs are relative to the position
484      *after* the reloc because that's what pre-CRISv32 PC points to
485      after reading an insn field with that reloc.  (For CRISv32, PC is
486      actually relative to the start of the insn, but we keep the old
487      definition.)  Still, we use as much generic machinery as we can.
488 
489      Only adjust when doing a final link.  */
490   if (output_bfd == (bfd *) NULL)
491     reloc_entry->addend -= 1 << reloc_entry->howto->size;
492 
493   return
494     bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
495 			   input_section, output_bfd, error_message);
496 }
497 
498 /* Support for core dump NOTE sections.
499    The slightly unintuitive code layout is an attempt to keep at least
500    some similarities with other ports, hoping to simplify general
501    changes, while still keeping Linux/CRIS and Linux/CRISv32 code apart.  */
502 
503 static bfd_boolean
cris_elf_grok_prstatus(bfd * abfd,Elf_Internal_Note * note)504 cris_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
505 {
506   int offset;
507   size_t size;
508 
509   if (bfd_get_mach (abfd) == bfd_mach_cris_v32)
510     switch (note->descsz)
511       {
512       default:
513 	return FALSE;
514 
515       case 202:		/* Linux/CRISv32 */
516 	/* pr_cursig */
517 	elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
518 
519 	/* pr_pid */
520 	elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 22);
521 
522 	/* pr_reg */
523 	offset = 70;
524 	size = 128;
525 
526 	break;
527       }
528   else
529     switch (note->descsz)
530       {
531       default:
532 	return FALSE;
533 
534       case 214:		/* Linux/CRIS */
535 	/* pr_cursig */
536 	elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
537 
538 	/* pr_pid */
539 	elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 22);
540 
541 	/* pr_reg */
542 	offset = 70;
543 	size = 140;
544 
545 	break;
546       }
547 
548   /* Make a ".reg/999" section.  */
549   return _bfd_elfcore_make_pseudosection (abfd, ".reg",
550 					  size, note->descpos + offset);
551 }
552 
553 static bfd_boolean
cris_elf_grok_psinfo(bfd * abfd,Elf_Internal_Note * note)554 cris_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
555 {
556   if (bfd_get_mach (abfd) == bfd_mach_cris_v32)
557     switch (note->descsz)
558       {
559       default:
560 	return FALSE;
561 
562       case 124:		/* Linux/CRISv32 elf_prpsinfo */
563 	elf_tdata (abfd)->core->program
564 	  = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
565 	elf_tdata (abfd)->core->command
566 	  = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
567       }
568   else
569     switch (note->descsz)
570       {
571       default:
572 	return FALSE;
573 
574       case 124:		/* Linux/CRIS elf_prpsinfo */
575 	elf_tdata (abfd)->core->program
576 	  = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
577 	elf_tdata (abfd)->core->command
578 	  = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
579       }
580 
581   /* Note that for some reason, a spurious space is tacked
582      onto the end of the args in some (at least one anyway)
583      implementations, so strip it off if it exists.  */
584 
585   {
586     char *command = elf_tdata (abfd)->core->command;
587     int n = strlen (command);
588 
589     if (0 < n && command[n - 1] == ' ')
590       command[n - 1] = '\0';
591   }
592 
593   return TRUE;
594 }
595 
596 /* The name of the dynamic interpreter.  This is put in the .interp
597    section.  */
598 
599 #define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1"
600 
601 /* The size in bytes of an entry in the procedure linkage table.  */
602 
603 #define PLT_ENTRY_SIZE 20
604 #define PLT_ENTRY_SIZE_V32 26
605 
606 /* The first entry in an absolute procedure linkage table looks like this.  */
607 
608 static const bfd_byte elf_cris_plt0_entry[PLT_ENTRY_SIZE] =
609 {
610   0xfc, 0xe1,
611   0x7e, 0x7e,	/* push mof.  */
612   0x7f, 0x0d,   /*  (dip [pc+]) */
613   0, 0, 0, 0,	/*  Replaced with address of .got + 4.  */
614   0x30, 0x7a,	/* move [...],mof */
615   0x7f, 0x0d,   /*  (dip [pc+]) */
616   0, 0, 0, 0,	/*  Replaced with address of .got + 8.  */
617   0x30, 0x09	/* jump [...] */
618 };
619 
620 static const bfd_byte elf_cris_plt0_entry_v32[PLT_ENTRY_SIZE_V32] =
621 {
622   0x84, 0xe2,	/* subq 4,$sp */
623   0x6f, 0xfe,	/* move.d 0,$acr */
624   0, 0, 0, 0,	/*  Replaced by address of .got + 4.  */
625   0x7e, 0x7a,	/* move $mof,[$sp] */
626   0x3f, 0x7a,	/* move [$acr],$mof */
627   0x04, 0xf2,	/* addq 4,acr */
628   0x6f, 0xfa,	/* move.d [$acr],$acr */
629   0xbf, 0x09,	/* jump $acr */
630   0xb0, 0x05,	/* nop */
631   0, 0		/*  Pad out to 26 bytes.  */
632 };
633 
634 /* Subsequent entries in an absolute procedure linkage table look like
635    this.  */
636 
637 static const bfd_byte elf_cris_plt_entry[PLT_ENTRY_SIZE] =
638 {
639   0x7f, 0x0d,   /*  (dip [pc+]) */
640   0, 0, 0, 0,	/*  Replaced with address of this symbol in .got.  */
641   0x30, 0x09,	/* jump [...] */
642   0x3f,	 0x7e,	/* move [pc+],mof */
643   0, 0, 0, 0,	/*  Replaced with offset into relocation table.  */
644   0x2f, 0xfe,	/* add.d [pc+],pc */
645   0xec, 0xff,
646   0xff, 0xff	/*  Replaced with offset to start of .plt.  */
647 };
648 
649 static const bfd_byte elf_cris_plt_entry_v32[PLT_ENTRY_SIZE_V32] =
650 {
651   0x6f, 0xfe,	/* move.d 0,$acr */
652   0, 0, 0, 0,	/*  Replaced with address of this symbol in .got.  */
653   0x6f, 0xfa,   /* move.d [$acr],$acr */
654   0xbf, 0x09,   /* jump $acr */
655   0xb0, 0x05,	/* nop */
656   0x3f, 0x7e,	/* move 0,mof */
657   0, 0, 0, 0,	/*  Replaced with offset into relocation table. */
658   0xbf, 0x0e,	/* ba start_of_plt0_entry */
659   0, 0, 0, 0,	/*  Replaced with offset to plt0 entry.  */
660   0xb0, 0x05	/* nop */
661 };
662 
663 /* The first entry in a PIC procedure linkage table looks like this.  */
664 
665 static const bfd_byte elf_cris_pic_plt0_entry[PLT_ENTRY_SIZE] =
666 {
667   0xfc, 0xe1, 0x7e, 0x7e,	/* push mof */
668   0x04, 0x01, 0x30, 0x7a,	/* move [r0+4],mof */
669   0x08, 0x01, 0x30, 0x09,	/* jump [r0+8] */
670   0, 0, 0, 0, 0, 0, 0, 0,	/*  Pad out to 20 bytes.  */
671 };
672 
673 static const bfd_byte elf_cris_pic_plt0_entry_v32[PLT_ENTRY_SIZE_V32] =
674 {
675   0x84, 0xe2,	/* subq 4,$sp */
676   0x04, 0x01,	/* addoq 4,$r0,$acr */
677   0x7e, 0x7a,	/* move $mof,[$sp] */
678   0x3f, 0x7a,	/* move [$acr],$mof */
679   0x04, 0xf2,	/* addq 4,$acr */
680   0x6f, 0xfa,	/* move.d [$acr],$acr */
681   0xbf, 0x09,	/* jump $acr */
682   0xb0, 0x05,	/* nop */
683   0, 0,		/*  Pad out to 26 bytes.  */
684   0, 0, 0, 0,
685   0, 0, 0, 0
686 };
687 
688 /* Subsequent entries in a PIC procedure linkage table look like this.  */
689 
690 static const bfd_byte elf_cris_pic_plt_entry[PLT_ENTRY_SIZE] =
691 {
692   0x6f, 0x0d,   /*  (bdap [pc+].d,r0) */
693   0, 0, 0, 0,	/*  Replaced with offset of this symbol in .got.  */
694   0x30, 0x09,	/* jump [...] */
695   0x3f, 0x7e,	/* move [pc+],mof */
696   0, 0, 0, 0,	/*  Replaced with offset into relocation table.  */
697   0x2f, 0xfe,	/* add.d [pc+],pc */
698   0xec, 0xff,	/*  Replaced with offset to start of .plt.  */
699   0xff, 0xff
700 };
701 
702 static const bfd_byte elf_cris_pic_plt_entry_v32[PLT_ENTRY_SIZE_V32] =
703 {
704   0x6f, 0x0d,	/* addo.d 0,$r0,$acr */
705   0, 0, 0, 0,	/*  Replaced with offset of this symbol in .got.  */
706   0x6f, 0xfa,	/* move.d [$acr],$acr */
707   0xbf, 0x09,	/* jump $acr */
708   0xb0, 0x05,	/* nop */
709   0x3f, 0x7e,	/* move relocoffs,$mof */
710   0, 0, 0, 0,	/*  Replaced with offset into relocation table.  */
711   0xbf, 0x0e,	/* ba start_of_plt */
712   0, 0, 0, 0,	/*  Replaced with offset to start of .plt.  */
713   0xb0, 0x05	/* nop */
714 };
715 
716 /* We copy elf32-m68k.c and elf32-i386.c for the basic linker hash bits
717    (and most other PIC/shlib stuff).  Check that we don't drift away
718    without reason.
719 
720    The CRIS linker, like the m68k and i386 linkers (and probably the rest
721    too) needs to keep track of the number of relocs that it decides to
722    copy in check_relocs for each symbol.  This is so that it can discard
723    PC relative relocs if it doesn't need them when linking with
724    -Bsymbolic.  We store the information in a field extending the regular
725    ELF linker hash table.  */
726 
727 /* This structure keeps track of the number of PC relative relocs we have
728    copied for a given symbol.  */
729 
730 struct elf_cris_pcrel_relocs_copied
731 {
732   /* Next section.  */
733   struct elf_cris_pcrel_relocs_copied *next;
734 
735   /* A section in dynobj.  */
736   asection *section;
737 
738   /* Number of relocs copied in this section.  */
739   bfd_size_type count;
740 
741   /* Example of reloc being copied, for message.  */
742   enum elf_cris_reloc_type r_type;
743 };
744 
745 /* CRIS ELF linker hash entry.  */
746 
747 struct elf_cris_link_hash_entry
748 {
749   struct elf_link_hash_entry root;
750 
751   /* Number of PC relative relocs copied for this symbol.  */
752   struct elf_cris_pcrel_relocs_copied *pcrel_relocs_copied;
753 
754   /* The GOTPLT references are CRIS-specific; the goal is to avoid having
755      both a general GOT and a PLT-specific GOT entry for the same symbol,
756      when it is referenced both as a function and as a function pointer.
757 
758      Number of GOTPLT references for a function.  */
759   bfd_signed_vma gotplt_refcount;
760 
761   /* Actual GOTPLT index for this symbol, if applicable, or zero if not
762      (zero is never used as an index).  FIXME: We should be able to fold
763      this with gotplt_refcount in a union, like the got and plt unions in
764      elf_link_hash_entry.  */
765   bfd_size_type gotplt_offset;
766 
767   /* The root.got.refcount is the sum of the regular reference counts
768      (this) and those members below.  We have to keep a separate count
769      to track when we've found the first (or last) reference to a
770      regular got entry.  The offset is in root.got.offset.  */
771   bfd_signed_vma reg_got_refcount;
772 
773   /* Similar to the above, the number of reloc references to this
774      symbols that need a R_CRIS_32_TPREL slot.  The offset is in
775      root.got.offset, because this and .dtp_refcount can't validly
776      happen when there's also a regular GOT entry; that's invalid
777      input for which an error is emitted.  */
778   bfd_signed_vma tprel_refcount;
779 
780   /* Similar to the above, the number of reloc references to this
781      symbols that need a R_CRIS_DTP slot.  The offset is in
782      root.got.offset; plus 4 if .tprel_refcount > 0.  */
783   bfd_signed_vma dtp_refcount;
784 };
785 
786 static bfd_boolean
787 elf_cris_discard_excess_dso_dynamics (struct elf_cris_link_hash_entry *,
788 				      void * );
789 static bfd_boolean
790 elf_cris_discard_excess_program_dynamics (struct elf_cris_link_hash_entry *,
791 					  void *);
792 
793 /* The local_got_refcounts and local_got_offsets are a multiple of
794    LSNUM in size, namely LGOT_ALLOC_NELTS_FOR(LSNUM) (plus one for the
795    refcount for GOT itself, see code), with the summary / group offset
796    for local symbols located at offset N, reference counts for
797    ordinary (address) relocs at offset N + LSNUM, for R_CRIS_DTP
798    relocs at offset N + 2*LSNUM, and for R_CRIS_32_TPREL relocs at N +
799    3*LSNUM.  */
800 
801 #define LGOT_REG_NDX(x) ((x) + symtab_hdr->sh_info)
802 #define LGOT_DTP_NDX(x) ((x) + 2 * symtab_hdr->sh_info)
803 #define LGOT_TPREL_NDX(x) ((x) + 3 * symtab_hdr->sh_info)
804 #define LGOT_ALLOC_NELTS_FOR(x) ((x) * 4)
805 
806 /* CRIS ELF linker hash table.  */
807 
808 struct elf_cris_link_hash_table
809 {
810   struct elf_link_hash_table root;
811 
812   /* We can't use the PLT offset and calculate to get the GOTPLT offset,
813      since we try and avoid creating GOTPLT:s when there's already a GOT.
814      Instead, we keep and update the next available index here.  */
815   bfd_size_type next_gotplt_entry;
816 
817   /* The number of R_CRIS_32_DTPREL and R_CRIS_16_DTPREL that have
818      been seen for any input; if != 0, then the constant-offset
819      R_CRIS_DTPMOD is needed for this DSO/executable.  This turns
820      negative at relocation, so that we don't need an extra flag for
821      when the reloc is output.  */
822   bfd_signed_vma dtpmod_refcount;
823 };
824 
825 /* Traverse a CRIS ELF linker hash table.  */
826 
827 #define elf_cris_link_hash_traverse(table, func, info)			\
828   (elf_link_hash_traverse						\
829    (&(table)->root,							\
830     (bfd_boolean (*) (struct elf_link_hash_entry *, void *)) (func),	\
831     (info)))
832 
833 /* Get the CRIS ELF linker hash table from a link_info structure.  */
834 
835 #define elf_cris_hash_table(p) \
836   (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
837   == CRIS_ELF_DATA ? ((struct elf_cris_link_hash_table *) ((p)->hash)) : NULL)
838 
839 /* Get the CRIS ELF linker hash entry from a regular hash entry (the
840    "parent class").  The .root reference is just a simple type
841    check on the argument.  */
842 
843 #define elf_cris_hash_entry(p) \
844  ((struct elf_cris_link_hash_entry *) (&(p)->root))
845 
846 /* Create an entry in a CRIS ELF linker hash table.  */
847 
848 static struct bfd_hash_entry *
elf_cris_link_hash_newfunc(struct bfd_hash_entry * entry,struct bfd_hash_table * table,const char * string)849 elf_cris_link_hash_newfunc (struct bfd_hash_entry *entry,
850 			    struct bfd_hash_table *table,
851 			    const char *string)
852 {
853   struct elf_cris_link_hash_entry *ret =
854     (struct elf_cris_link_hash_entry *) entry;
855 
856   /* Allocate the structure if it has not already been allocated by a
857      subclass.  */
858   if (ret == (struct elf_cris_link_hash_entry *) NULL)
859     ret = ((struct elf_cris_link_hash_entry *)
860 	   bfd_hash_allocate (table,
861 			      sizeof (struct elf_cris_link_hash_entry)));
862   if (ret == (struct elf_cris_link_hash_entry *) NULL)
863     return (struct bfd_hash_entry *) ret;
864 
865   /* Call the allocation method of the superclass.  */
866   ret = ((struct elf_cris_link_hash_entry *)
867 	 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
868 				     table, string));
869   if (ret != (struct elf_cris_link_hash_entry *) NULL)
870     {
871       ret->pcrel_relocs_copied = NULL;
872       ret->gotplt_refcount = 0;
873       ret->gotplt_offset = 0;
874       ret->dtp_refcount = 0;
875       ret->tprel_refcount = 0;
876       ret->reg_got_refcount = 0;
877     }
878 
879   return (struct bfd_hash_entry *) ret;
880 }
881 
882 /* Create a CRIS ELF linker hash table.  */
883 
884 static struct bfd_link_hash_table *
elf_cris_link_hash_table_create(bfd * abfd)885 elf_cris_link_hash_table_create (bfd *abfd)
886 {
887   struct elf_cris_link_hash_table *ret;
888   bfd_size_type amt = sizeof (struct elf_cris_link_hash_table);
889 
890   ret = ((struct elf_cris_link_hash_table *) bfd_zmalloc (amt));
891   if (ret == (struct elf_cris_link_hash_table *) NULL)
892     return NULL;
893 
894   if (!_bfd_elf_link_hash_table_init (&ret->root, abfd,
895 				      elf_cris_link_hash_newfunc,
896 				      sizeof (struct elf_cris_link_hash_entry),
897 				      CRIS_ELF_DATA))
898     {
899       free (ret);
900       return NULL;
901     }
902 
903   /* Initialize to skip over the first three entries in the gotplt; they
904      are used for run-time symbol evaluation.  */
905   ret->next_gotplt_entry = 12;
906 
907   return &ret->root.root;
908 }
909 
910 /* Perform a single relocation.  By default we use the standard BFD
911    routines, with a few tweaks.  */
912 
913 static bfd_reloc_status_type
cris_final_link_relocate(reloc_howto_type * howto,bfd * input_bfd,asection * input_section,bfd_byte * contents,Elf_Internal_Rela * rel,bfd_vma relocation)914 cris_final_link_relocate (reloc_howto_type *  howto,
915 			  bfd *               input_bfd,
916 			  asection *          input_section,
917 			  bfd_byte *          contents,
918 			  Elf_Internal_Rela * rel,
919 			  bfd_vma             relocation)
920 {
921   bfd_reloc_status_type r;
922   enum elf_cris_reloc_type r_type = ELF32_R_TYPE (rel->r_info);
923 
924   /* PC-relative relocations are relative to the position *after*
925      the reloc.  Note that for R_CRIS_8_PCREL the adjustment is
926      not a single byte, since PC must be 16-bit-aligned.  */
927   switch (r_type)
928     {
929       /* Check that the 16-bit GOT relocs are positive.  */
930     case R_CRIS_16_GOTPLT:
931     case R_CRIS_16_GOT:
932       if ((bfd_signed_vma) relocation < 0)
933 	return bfd_reloc_overflow;
934       break;
935 
936     case R_CRIS_32_PLT_PCREL:
937     case R_CRIS_32_PCREL:
938       relocation -= 2;
939       /* Fall through.  */
940     case R_CRIS_8_PCREL:
941     case R_CRIS_16_PCREL:
942       relocation -= 2;
943       break;
944 
945     default:
946       break;
947     }
948 
949   r = _bfd_final_link_relocate (howto, input_bfd, input_section,
950 				contents, rel->r_offset,
951 				relocation, rel->r_addend);
952   return r;
953 }
954 
955 
956 /* The number of errors left before we stop outputting reloc-specific
957    explanatory messages.  By coincidence, this works nicely together
958    with the default number of messages you'll get from LD about
959    "relocation truncated to fit" messages before you get an
960    "additional relocation overflows omitted from the output".  */
961 static int additional_relocation_error_msg_count = 10;
962 
963 /* Relocate an CRIS ELF section.  See elf32-fr30.c, from where this was
964    copied, for further comments.  */
965 
966 static bfd_boolean
cris_elf_relocate_section(bfd * output_bfd ATTRIBUTE_UNUSED,struct bfd_link_info * info,bfd * input_bfd,asection * input_section,bfd_byte * contents,Elf_Internal_Rela * relocs,Elf_Internal_Sym * local_syms,asection ** local_sections)967 cris_elf_relocate_section (bfd *output_bfd ATTRIBUTE_UNUSED,
968 			   struct bfd_link_info *info,
969 			   bfd *input_bfd,
970 			   asection *input_section,
971 			   bfd_byte *contents,
972 			   Elf_Internal_Rela *relocs,
973 			   Elf_Internal_Sym *local_syms,
974 			   asection **local_sections)
975 {
976   struct elf_cris_link_hash_table * htab;
977   bfd *dynobj;
978   Elf_Internal_Shdr *symtab_hdr;
979   struct elf_link_hash_entry **sym_hashes;
980   bfd_vma *local_got_offsets;
981   asection *sgot;
982   asection *splt;
983   asection *sreloc;
984   Elf_Internal_Rela *rel;
985   Elf_Internal_Rela *relend;
986   asection *srelgot;
987 
988   htab = elf_cris_hash_table (info);
989   if (htab == NULL)
990     return FALSE;
991 
992   dynobj = elf_hash_table (info)->dynobj;
993   local_got_offsets = elf_local_got_offsets (input_bfd);
994   symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
995   sym_hashes = elf_sym_hashes (input_bfd);
996   relend     = relocs + input_section->reloc_count;
997 
998   sgot = NULL;
999   splt = NULL;
1000   sreloc = NULL;
1001   srelgot = NULL;
1002 
1003   if (dynobj != NULL)
1004     {
1005       splt = bfd_get_linker_section (dynobj, ".plt");
1006       sgot = bfd_get_linker_section (dynobj, ".got");
1007     }
1008 
1009   for (rel = relocs; rel < relend; rel ++)
1010     {
1011       reloc_howto_type *howto;
1012       unsigned long r_symndx;
1013       Elf_Internal_Sym *sym;
1014       asection *sec;
1015       struct elf_link_hash_entry *h;
1016       bfd_vma relocation;
1017       bfd_reloc_status_type r;
1018       const char *symname = NULL;
1019       enum elf_cris_reloc_type r_type;
1020 
1021       r_type = ELF32_R_TYPE (rel->r_info);
1022 
1023       if (   r_type == R_CRIS_GNU_VTINHERIT
1024 	  || r_type == R_CRIS_GNU_VTENTRY)
1025 	continue;
1026 
1027       r_symndx = ELF32_R_SYM (rel->r_info);
1028       howto  = cris_elf_howto_table + r_type;
1029       h      = NULL;
1030       sym    = NULL;
1031       sec    = NULL;
1032 
1033       if (r_symndx < symtab_hdr->sh_info)
1034 	{
1035 	  sym = local_syms + r_symndx;
1036 	  sec = local_sections [r_symndx];
1037 	  relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
1038 
1039 	  symname = (bfd_elf_string_from_elf_section
1040 		     (input_bfd, symtab_hdr->sh_link, sym->st_name));
1041 	  if (symname == NULL)
1042 	    symname = bfd_section_name (input_bfd, sec);
1043 	}
1044       else
1045 	{
1046 	  bfd_boolean warned, ignored;
1047 	  bfd_boolean unresolved_reloc;
1048 
1049 	  RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
1050 				   r_symndx, symtab_hdr, sym_hashes,
1051 				   h, sec, relocation,
1052 				   unresolved_reloc, warned, ignored);
1053 
1054 	  symname = h->root.root.string;
1055 
1056 	  if (unresolved_reloc
1057 	      /* Perhaps we should detect the cases that
1058 		 sec->output_section is expected to be NULL like i386 and
1059 		 m68k, but apparently (and according to elfxx-ia64.c) all
1060 		 valid cases are where the symbol is defined in a shared
1061 		 object which we link dynamically against.  This includes
1062 		 PLT relocs for which we've created a PLT entry and other
1063 		 relocs for which we're prepared to create dynamic
1064 		 relocations.
1065 
1066 		 For now, new situations cause us to just err when
1067 		 sec->output_offset is NULL but the object with the symbol
1068 		 is *not* dynamically linked against.  Thus this will
1069 		 automatically remind us so we can see if there are other
1070 		 valid cases we need to revisit.  */
1071 	      && (sec->owner->flags & DYNAMIC) != 0)
1072 	    relocation = 0;
1073 
1074 	  else if (h->root.type == bfd_link_hash_defined
1075 		   || h->root.type == bfd_link_hash_defweak)
1076 	    {
1077 	      /* Here follow the cases where the relocation value must
1078 		 be zero (or when further handling is simplified when
1079 		 zero).  I can't claim to understand the various
1080 		 conditions and they weren't described in the files
1081 		 where I copied them from (elf32-m68k.c and
1082 		 elf32-i386.c), but let's mention examples of where
1083 		 they happen.  FIXME: Perhaps define and use a
1084 		 dynamic_symbol_p function like ia64.
1085 
1086 		 - When creating a shared library, we can have an
1087 		 ordinary relocation for a symbol defined in a shared
1088 		 library (perhaps the one we create).  We then make
1089 		 the relocation value zero, as the value seen now will
1090 		 be added into the relocation addend in this shared
1091 		 library, but must be handled only at dynamic-link
1092 		 time.  FIXME: Not sure this example covers the
1093 		 h->elf_link_hash_flags test, though it's there in
1094 		 other targets.  */
1095 	      if (bfd_link_pic (info)
1096 		  && ((!SYMBOLIC_BIND (info, h) && h->dynindx != -1)
1097 		      || !h->def_regular)
1098 		  && (input_section->flags & SEC_ALLOC) != 0
1099 		  && (r_type == R_CRIS_8
1100 		      || r_type == R_CRIS_16
1101 		      || r_type == R_CRIS_32
1102 		      || r_type == R_CRIS_8_PCREL
1103 		      || r_type == R_CRIS_16_PCREL
1104 		      || r_type == R_CRIS_32_PCREL))
1105 		relocation = 0;
1106 	      else if (!bfd_link_relocatable (info) && unresolved_reloc
1107 		       && (_bfd_elf_section_offset (output_bfd, info,
1108 						    input_section,
1109 						    rel->r_offset)
1110 			   != (bfd_vma) -1))
1111 		{
1112 		  _bfd_error_handler
1113 		    (_("%B, section %A: unresolvable relocation %s against symbol `%s'"),
1114 		     input_bfd,
1115 		     input_section,
1116 		     cris_elf_howto_table[r_type].name,
1117 		     symname);
1118 		  bfd_set_error (bfd_error_bad_value);
1119 		  return FALSE;
1120 		}
1121 	    }
1122 	}
1123 
1124       if (sec != NULL && discarded_section (sec))
1125 	RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
1126 					 rel, 1, relend, howto, 0, contents);
1127 
1128       if (bfd_link_relocatable (info))
1129 	continue;
1130 
1131       switch (r_type)
1132 	{
1133 	case R_CRIS_16_GOTPLT:
1134 	case R_CRIS_32_GOTPLT:
1135 	  /* This is like the case for R_CRIS_32_GOT and R_CRIS_16_GOT,
1136 	     but we require a PLT, and the PLT handling will take care of
1137 	     filling in the PLT-specific GOT entry.  For the GOT offset,
1138 	     calculate it as we do when filling it in for the .got.plt
1139 	     section.  If we don't have a PLT, punt to GOT handling.  */
1140 	  if (h != NULL
1141 	      && ((struct elf_cris_link_hash_entry *) h)->gotplt_offset != 0)
1142 	    {
1143 	      asection *sgotplt
1144 		= bfd_get_linker_section (dynobj, ".got.plt");
1145 	      bfd_vma got_offset;
1146 
1147 	      BFD_ASSERT (h->dynindx != -1);
1148 	      BFD_ASSERT (sgotplt != NULL);
1149 
1150 	      got_offset
1151 		= ((struct elf_cris_link_hash_entry *) h)->gotplt_offset;
1152 
1153 	      relocation = got_offset;
1154 	      break;
1155 	    }
1156 
1157 	  /* We didn't make a PLT entry for this symbol.  Maybe everything is
1158 	     folded into the GOT.  Other than folding, this happens when
1159 	     statically linking PIC code, or when using -Bsymbolic.  Check
1160 	     that we instead have a GOT entry as done for us by
1161 	     elf_cris_adjust_dynamic_symbol, and drop through into the
1162 	     ordinary GOT cases.  This must not happen for the
1163 	     executable, because any reference it does to a function
1164 	     that is satisfied by a DSO must generate a PLT.  We assume
1165 	     these call-specific relocs don't address non-functions.  */
1166 	  if (h != NULL
1167 	      && (h->got.offset == (bfd_vma) -1
1168 		  || (!bfd_link_pic (info)
1169 		      && !(h->def_regular
1170 			   || (!h->def_dynamic
1171 			       && h->root.type == bfd_link_hash_undefweak)))))
1172 	    {
1173 	      (*_bfd_error_handler)
1174 		((h->got.offset == (bfd_vma) -1)
1175 		 ? _("%B, section %A: No PLT nor GOT for relocation %s"
1176 		     " against symbol `%s'")
1177 		 : _("%B, section %A: No PLT for relocation %s"
1178 		     " against symbol `%s'"),
1179 		 input_bfd,
1180 		 input_section,
1181 		 cris_elf_howto_table[r_type].name,
1182 		 (symname != NULL && symname[0] != '\0'
1183 		  ? symname : _("[whose name is lost]")));
1184 
1185 	      /* FIXME: Perhaps blaming input is not the right thing to
1186 		 do; this is probably an internal error.  But it is true
1187 		 that we didn't like that particular input.  */
1188 	      bfd_set_error (bfd_error_bad_value);
1189 	      return FALSE;
1190 	    }
1191 	  /* Fall through.  */
1192 
1193 	  /* The size of the actual relocation is not used here; we only
1194 	     fill in the GOT table here.  */
1195 	case R_CRIS_16_GOT:
1196 	case R_CRIS_32_GOT:
1197 	  {
1198 	    bfd_vma off;
1199 
1200 	    /* Note that despite using RELA relocations, the .got contents
1201 	       is always filled in with the link-relative relocation
1202 	       value; the addend.  */
1203 
1204 	    if (h != NULL)
1205 	      {
1206 		off = h->got.offset;
1207 		BFD_ASSERT (off != (bfd_vma) -1);
1208 
1209 		if (!elf_hash_table (info)->dynamic_sections_created
1210 		    || (! bfd_link_pic (info)
1211 			&& (h->def_regular
1212 			    || h->type == STT_FUNC
1213 			    || h->needs_plt))
1214 		    || (bfd_link_pic (info)
1215 			&& (SYMBOLIC_BIND (info, h) || h->dynindx == -1)
1216 			&& h->def_regular))
1217 		  {
1218 		    /* This wasn't checked above for ! bfd_link_pic (info), but
1219 		       must hold there if we get here; the symbol must
1220 		       be defined in the regular program or be undefweak
1221 		       or be a function or otherwise need a PLT.  */
1222 		    BFD_ASSERT (!elf_hash_table (info)->dynamic_sections_created
1223 				|| bfd_link_pic (info)
1224 				|| h->def_regular
1225 				|| h->type == STT_FUNC
1226 				|| h->needs_plt
1227 				|| h->root.type == bfd_link_hash_undefweak);
1228 
1229 		    /* This is actually a static link, or it is a
1230 		       -Bsymbolic link and the symbol is defined locally,
1231 		       or is undefweak, or the symbol was forced to be
1232 		       local because of a version file, or we're not
1233 		       creating a dynamic object.  We must initialize this
1234 		       entry in the global offset table.  Since the offset
1235 		       must always be a multiple of 4, we use the least
1236 		       significant bit to record whether we have
1237 		       initialized it already.
1238 
1239 		       If this GOT entry should be runtime-initialized, we
1240 		       will create a .rela.got relocation entry to
1241 		       initialize the value.  This is done in the
1242 		       finish_dynamic_symbol routine.  */
1243 		    if ((off & 1) != 0)
1244 		      off &= ~1;
1245 		    else
1246 		      {
1247 			bfd_put_32 (output_bfd, relocation,
1248 				    sgot->contents + off);
1249 			h->got.offset |= 1;
1250 		      }
1251 		  }
1252 	      }
1253 	    else
1254 	      {
1255 		BFD_ASSERT (local_got_offsets != NULL
1256 			    && local_got_offsets[r_symndx] != (bfd_vma) -1);
1257 
1258 		off = local_got_offsets[r_symndx];
1259 
1260 		/* The offset must always be a multiple of 4.  We use
1261 		   the least significant bit to record whether we have
1262 		   already generated the necessary reloc.  */
1263 		if ((off & 1) != 0)
1264 		  off &= ~1;
1265 		else
1266 		  {
1267 		    bfd_put_32 (output_bfd, relocation, sgot->contents + off);
1268 
1269 		    if (bfd_link_pic (info))
1270 		      {
1271 			Elf_Internal_Rela outrel;
1272 			bfd_byte *loc;
1273 
1274 			if (srelgot == NULL)
1275 			  srelgot
1276 			    = bfd_get_linker_section (dynobj, ".rela.got");
1277 			BFD_ASSERT (srelgot != NULL);
1278 
1279 			outrel.r_offset = (sgot->output_section->vma
1280 					   + sgot->output_offset
1281 					   + off);
1282 			outrel.r_info = ELF32_R_INFO (0, R_CRIS_RELATIVE);
1283 			outrel.r_addend = relocation;
1284 			loc = srelgot->contents;
1285 			loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
1286 			bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1287 		      }
1288 
1289 		    local_got_offsets[r_symndx] |= 1;
1290 		  }
1291 	      }
1292 
1293 	    relocation = sgot->output_offset + off;
1294 	    if (rel->r_addend != 0)
1295 	      {
1296 		/* We can't do anything for a relocation which is against
1297 		   a symbol *plus offset*.  GOT holds relocations for
1298 		   symbols.  Make this an error; the compiler isn't
1299 		   allowed to pass us these kinds of things.  */
1300 		if (h == NULL)
1301 		  (*_bfd_error_handler)
1302 		    (_("%B, section %A: relocation %s with non-zero addend %d"
1303 		       " against local symbol"),
1304 		     input_bfd,
1305 		     input_section,
1306 		     cris_elf_howto_table[r_type].name,
1307 		     rel->r_addend);
1308 		else
1309 		  (*_bfd_error_handler)
1310 		    (_("%B, section %A: relocation %s with non-zero addend %d"
1311 		       " against symbol `%s'"),
1312 		     input_bfd,
1313 		     input_section,
1314 		     cris_elf_howto_table[r_type].name,
1315 		     rel->r_addend,
1316 		     symname[0] != '\0' ? symname : _("[whose name is lost]"));
1317 
1318 		bfd_set_error (bfd_error_bad_value);
1319 		return FALSE;
1320 	      }
1321 	  }
1322 	  break;
1323 
1324 	case R_CRIS_32_GOTREL:
1325 	  /* This relocation must only be performed against local symbols.
1326 	     It's also ok when we link a program and the symbol is either
1327 	     defined in an ordinary (non-DSO) object or is undefined weak.  */
1328 	  if (h != NULL
1329 	      && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1330 	      && !(!bfd_link_pic (info)
1331 		   && (h->def_regular
1332 		       || (!h->def_dynamic
1333 			   && h->root.type == bfd_link_hash_undefweak))))
1334 	    {
1335 	      (*_bfd_error_handler)
1336 		(_("%B, section %A: relocation %s is"
1337 		   " not allowed for global symbol: `%s'"),
1338 		 input_bfd,
1339 		 input_section,
1340 		 cris_elf_howto_table[r_type].name,
1341 		 symname);
1342 	      bfd_set_error (bfd_error_bad_value);
1343 	      return FALSE;
1344 	    }
1345 
1346 	  /* This can happen if we get a link error with the input ELF
1347 	     variant mismatching the output variant.  Emit an error so
1348 	     it's noticed if it happens elsewhere.  */
1349 	  if (sgot == NULL)
1350 	    {
1351 	      (*_bfd_error_handler)
1352 		(_("%B, section %A: relocation %s with no GOT created"),
1353 		 input_bfd,
1354 		 input_section,
1355 		 cris_elf_howto_table[r_type].name);
1356 	      bfd_set_error (bfd_error_bad_value);
1357 	      return FALSE;
1358 	    }
1359 
1360 	  /* This relocation is like a PC-relative one, except the
1361 	     reference point is the location of GOT.  Note that
1362 	     sgot->output_offset is not involved in this calculation.  We
1363 	     always want the start of entire .got section, not the
1364 	     position after the reserved header.  */
1365 	  relocation -= sgot->output_section->vma;
1366 	  break;
1367 
1368 	case R_CRIS_32_PLT_PCREL:
1369 	  /* Relocation is to the entry for this symbol in the
1370 	     procedure linkage table.  */
1371 
1372 	  /* Resolve a PLT_PCREL reloc against a local symbol directly,
1373 	     without using the procedure linkage table.  */
1374 	  if (h == NULL || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
1375 	    break;
1376 
1377 	  if (h->plt.offset == (bfd_vma) -1
1378 	      || splt == NULL)
1379 	    {
1380 	      /* We didn't make a PLT entry for this symbol.  This
1381 		 happens when statically linking PIC code, or when
1382 		 using -Bsymbolic.  */
1383 	      break;
1384 	    }
1385 
1386 	  relocation = (splt->output_section->vma
1387 			+ splt->output_offset
1388 			+ h->plt.offset);
1389 	  break;
1390 
1391 	case R_CRIS_32_PLT_GOTREL:
1392 	  /* Like R_CRIS_32_PLT_PCREL, but the reference point is the
1393 	     start of the .got section.  See also comment at
1394 	     R_CRIS_32_GOT.  */
1395 	  relocation -= sgot->output_section->vma;
1396 
1397 	  /* Resolve a PLT_GOTREL reloc against a local symbol directly,
1398 	     without using the procedure linkage table.  */
1399 	  if (h == NULL || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
1400 	    break;
1401 
1402 	  if (h->plt.offset == (bfd_vma) -1
1403 	      || splt == NULL)
1404 	    {
1405 	      /* We didn't make a PLT entry for this symbol.  This
1406 		 happens when statically linking PIC code, or when
1407 		 using -Bsymbolic.  */
1408 	      break;
1409 	    }
1410 
1411 	  relocation = (splt->output_section->vma
1412 			+ splt->output_offset
1413 			+ h->plt.offset
1414 			- sgot->output_section->vma);
1415 	  break;
1416 
1417 	case R_CRIS_8_PCREL:
1418 	case R_CRIS_16_PCREL:
1419 	case R_CRIS_32_PCREL:
1420 	  /* If the symbol was local, we need no shlib-specific handling.  */
1421 	  if (h == NULL || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1422 	      || h->dynindx == -1)
1423 	    break;
1424 
1425 	  /* Fall through.  */
1426 	case R_CRIS_8:
1427 	case R_CRIS_16:
1428 	case R_CRIS_32:
1429 	  if (bfd_link_pic (info)
1430 	      && r_symndx != STN_UNDEF
1431 	      && (input_section->flags & SEC_ALLOC) != 0
1432 	      && ((r_type != R_CRIS_8_PCREL
1433 		   && r_type != R_CRIS_16_PCREL
1434 		   && r_type != R_CRIS_32_PCREL)
1435 		  || (!SYMBOLIC_BIND (info, h)
1436 		      || (h != NULL && !h->def_regular))))
1437 	    {
1438 	      Elf_Internal_Rela outrel;
1439 	      bfd_byte *loc;
1440 	      bfd_boolean skip, relocate;
1441 
1442 	      /* When generating a shared object, these relocations
1443 		 are copied into the output file to be resolved at run
1444 		 time.  */
1445 
1446 	      if (sreloc == NULL)
1447 		{
1448 		  sreloc = _bfd_elf_get_dynamic_reloc_section
1449 		    (dynobj, input_section, /*rela?*/ TRUE);
1450 		  /* The section should have been created in cris_elf_check_relocs,
1451 		     but that function will not be called for objects which fail in
1452 		     cris_elf_merge_private_bfd_data.  */
1453 		  if (sreloc == NULL)
1454 		    {
1455 		      bfd_set_error (bfd_error_bad_value);
1456 		      return FALSE;
1457 		    }
1458 		}
1459 
1460 	      skip = FALSE;
1461 	      relocate = FALSE;
1462 
1463 	      outrel.r_offset =
1464 		_bfd_elf_section_offset (output_bfd, info, input_section,
1465 					 rel->r_offset);
1466 	      if (outrel.r_offset == (bfd_vma) -1)
1467 		skip = TRUE;
1468 	      else if (outrel.r_offset == (bfd_vma) -2
1469 		       /* For now, undefined weak symbols with non-default
1470 			  visibility (yielding 0), like exception info for
1471 			  discarded sections, will get a R_CRIS_NONE
1472 			  relocation rather than no relocation, because we
1473 			  notice too late that the symbol doesn't need a
1474 			  relocation.  */
1475 		       || (h != NULL
1476 			   && h->root.type == bfd_link_hash_undefweak
1477 			   && ELF_ST_VISIBILITY (h->other) != STV_DEFAULT))
1478 		skip = TRUE, relocate = TRUE;
1479 	      outrel.r_offset += (input_section->output_section->vma
1480 				  + input_section->output_offset);
1481 
1482 	      if (skip)
1483 		memset (&outrel, 0, sizeof outrel);
1484 	      /* h->dynindx may be -1 if the symbol was marked to
1485 		 become local.  */
1486 	      else if (h != NULL
1487 		       && ((!SYMBOLIC_BIND (info, h) && h->dynindx != -1)
1488 			   || !h->def_regular))
1489 		{
1490 		  BFD_ASSERT (h->dynindx != -1);
1491 		  outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
1492 		  outrel.r_addend = relocation + rel->r_addend;
1493 		}
1494 	      else
1495 		{
1496 		  outrel.r_addend = relocation + rel->r_addend;
1497 
1498 		  if (r_type == R_CRIS_32)
1499 		    {
1500 		      relocate = TRUE;
1501 		      outrel.r_info = ELF32_R_INFO (0, R_CRIS_RELATIVE);
1502 		    }
1503 		  else
1504 		    {
1505 		      long indx;
1506 
1507 		      if (bfd_is_abs_section (sec))
1508 			indx = 0;
1509 		      else if (sec == NULL || sec->owner == NULL)
1510 			{
1511 			  bfd_set_error (bfd_error_bad_value);
1512 			  return FALSE;
1513 			}
1514 		      else
1515 			{
1516 			  asection *osec;
1517 
1518 			  /* We are turning this relocation into one
1519 			     against a section symbol.  It would be
1520 			     proper to subtract the symbol's value,
1521 			     osec->vma, from the emitted reloc addend,
1522 			     but ld.so expects buggy relocs.  */
1523 			  osec = sec->output_section;
1524 			  indx = elf_section_data (osec)->dynindx;
1525 			  if (indx == 0)
1526 			    {
1527 			      osec = htab->root.text_index_section;
1528 			      indx = elf_section_data (osec)->dynindx;
1529 			    }
1530 			  BFD_ASSERT (indx != 0);
1531 			}
1532 
1533 		      outrel.r_info = ELF32_R_INFO (indx, r_type);
1534 		    }
1535 		}
1536 
1537 	      loc = sreloc->contents;
1538 	      loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
1539 	      bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1540 
1541 	      /* This reloc will be computed at runtime, so there's no
1542                  need to do anything now, except for R_CRIS_32 relocations
1543                  that have been turned into R_CRIS_RELATIVE.  */
1544 	      if (!relocate)
1545 		continue;
1546 	    }
1547 
1548 	  break;
1549 
1550 	case R_CRIS_16_DTPREL:
1551 	case R_CRIS_32_DTPREL:
1552 	  /* This relocation must only be performed against local
1553 	     symbols, or to sections that are not loadable.  It's also
1554 	     ok when we link a program and the symbol is defined in an
1555 	     ordinary (non-DSO) object (if it's undefined there, we've
1556 	     already seen an error).  */
1557 	  if (h != NULL
1558 	      && (input_section->flags & SEC_ALLOC) != 0
1559 	      && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1560 	      && (bfd_link_pic (info)
1561 		  || (!h->def_regular
1562 		      && h->root.type != bfd_link_hash_undefined)))
1563 	    {
1564 	      (*_bfd_error_handler)
1565 		((h->root.type == bfd_link_hash_undefined)
1566 		 /* We shouldn't get here for GCC-emitted code.  */
1567 		 ? _("%B, section %A: relocation %s has an undefined"
1568 		     " reference to `%s', perhaps a declaration mixup?")
1569 		 : ("%B, section %A: relocation %s is"
1570 		     " not allowed for `%s', a global symbol with default"
1571 		     " visibility, perhaps a declaration mixup?"),
1572 		 input_bfd,
1573 		 input_section,
1574 		 cris_elf_howto_table[r_type].name,
1575 		 symname != NULL && symname[0] != '\0'
1576 		 ? symname : _("[whose name is lost]"));
1577 	      bfd_set_error (bfd_error_bad_value);
1578 	      return FALSE;
1579 	    }
1580 
1581 	  BFD_ASSERT ((input_section->flags & SEC_ALLOC) == 0
1582 		      || htab->dtpmod_refcount != 0);
1583 
1584 	  /* Fill in a R_CRIS_DTPMOD reloc at offset 3 if we haven't
1585 	     already done so.  Note that we do this in .got.plt, not
1586 	     in .got, as .got.plt contains the first part, still the
1587 	     reloc is against .got, because the linker script directs
1588 	     (is required to direct) them both into .got.  */
1589 	  if (htab->dtpmod_refcount > 0
1590 	      && (input_section->flags & SEC_ALLOC) != 0)
1591 	    {
1592 	      asection *sgotplt = bfd_get_linker_section (dynobj, ".got.plt");
1593 	      BFD_ASSERT (sgotplt != NULL);
1594 
1595 	      if (bfd_link_pic (info))
1596 		{
1597 		  Elf_Internal_Rela outrel;
1598 		  bfd_byte *loc;
1599 
1600 		  if (srelgot == NULL)
1601 		    srelgot = bfd_get_linker_section (dynobj, ".rela.got");
1602 		  BFD_ASSERT (srelgot != NULL);
1603 		  loc = srelgot->contents;
1604 		  loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
1605 
1606 		  bfd_put_32 (output_bfd, (bfd_vma) 0, sgotplt->contents + 12);
1607 		  bfd_put_32 (output_bfd, (bfd_vma) 0, sgotplt->contents + 16);
1608 		  outrel.r_offset = (sgotplt->output_section->vma
1609 				     + sgotplt->output_offset
1610 				     + 12);
1611 		  outrel.r_info = ELF32_R_INFO (0, R_CRIS_DTPMOD);
1612 		  outrel.r_addend = 0;
1613 		  bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1614 		}
1615 	      else
1616 		{
1617 		  /* For an executable, the GOT entry contents is known.  */
1618 		  bfd_put_32 (output_bfd, (bfd_vma) 1, sgotplt->contents + 12);
1619 		  bfd_put_32 (output_bfd, (bfd_vma) 0, sgotplt->contents + 16);
1620 		}
1621 
1622 	      /* Reverse the sign to mark that we've emitted the
1623 		 required GOT entry.  */
1624 	      htab->dtpmod_refcount = - htab->dtpmod_refcount;
1625 	    }
1626 
1627 	  /* The relocation is the offset from the start of the module
1628 	     TLS block to the (local) symbol.  */
1629 	  relocation -= elf_hash_table (info)->tls_sec == NULL
1630 	    ? 0 : elf_hash_table (info)->tls_sec->vma;
1631 	  break;
1632 
1633 	case R_CRIS_32_GD:
1634 	  if (bfd_link_pic (info))
1635 	    {
1636 	      bfd_set_error (bfd_error_invalid_operation);
1637 
1638 	      /* We've already informed in cris_elf_check_relocs that
1639 		 this is an error.  */
1640 	      return FALSE;
1641 	    }
1642 	  /* Fall through.  */
1643 
1644 	case R_CRIS_16_GOT_GD:
1645 	case R_CRIS_32_GOT_GD:
1646 	  if (rel->r_addend != 0)
1647 	    {
1648 	      /* We can't do anything for a relocation which is against a
1649 		 symbol *plus offset*.  The GOT holds relocations for
1650 		 symbols.  Make this an error; the compiler isn't allowed
1651 		 to pass us these kinds of things.  */
1652 	      (*_bfd_error_handler)
1653 		(_("%B, section %A: relocation %s with non-zero addend %d"
1654 		   " against symbol `%s'"),
1655 		 input_bfd,
1656 		 input_section,
1657 		 cris_elf_howto_table[r_type].name,
1658 		 rel->r_addend,
1659 		 symname[0] != '\0' ? symname : _("[whose name is lost]"));
1660 
1661 	      bfd_set_error (bfd_error_bad_value);
1662 	      return FALSE;
1663 	    }
1664 
1665 	  if (!bfd_link_pic (info)
1666 	      && (h == NULL || h->def_regular || ELF_COMMON_DEF_P (h)))
1667 	    {
1668 	      /* Known contents of the GOT.  */
1669 	      bfd_vma off;
1670 
1671 	      /* The symbol is defined in the program, so just write
1672 		 (1, known_tpoffset) into the GOT.  */
1673 	      relocation -= elf_hash_table (info)->tls_sec->vma;
1674 
1675 	      if (h != NULL)
1676 		{
1677 		  off = elf_cris_hash_entry (h)->tprel_refcount > 0
1678 		    ? h->got.offset + 4 : h->got.offset;
1679 		}
1680 	      else
1681 		{
1682 		  off = local_got_offsets[r_symndx];
1683 		  if (local_got_offsets[LGOT_TPREL_NDX (r_symndx)])
1684 		    off += 4;
1685 		}
1686 
1687 	      /* We use bit 1 of the offset as a flag for GOT entry with
1688 		 the R_CRIS_DTP reloc, setting it when we've emitted the
1689 		 GOT entry and reloc.  Bit 0 is used for R_CRIS_32_TPREL
1690 		 relocs.  */
1691 	      if ((off & 2) == 0)
1692 		{
1693 		  off &= ~3;
1694 
1695 		  if (h != NULL)
1696 		    h->got.offset |= 2;
1697 		  else
1698 		    local_got_offsets[r_symndx] |= 2;
1699 
1700 		  bfd_put_32 (output_bfd, 1, sgot->contents + off);
1701 		  bfd_put_32 (output_bfd, relocation, sgot->contents + off + 4);
1702 		}
1703 	      else
1704 		off &= ~3;
1705 
1706 	      relocation = sgot->output_offset + off
1707 		+ (r_type == R_CRIS_32_GD ? sgot->output_section->vma : 0);
1708 	    }
1709 	  else
1710 	    {
1711 	      /* Not all parts of the GOT entry are known; emit a real
1712 		 relocation.  */
1713 	      bfd_vma off;
1714 
1715 	      if (h != NULL)
1716 		off = elf_cris_hash_entry (h)->tprel_refcount > 0
1717 		  ? h->got.offset + 4 : h->got.offset;
1718 	      else
1719 		{
1720 		  off = local_got_offsets[r_symndx];
1721 		  if (local_got_offsets[LGOT_TPREL_NDX (r_symndx)])
1722 		    off += 4;
1723 		}
1724 
1725 	      /* See above re bit 1 and bit 0 usage.  */
1726 	      if ((off & 2) == 0)
1727 		{
1728 		  Elf_Internal_Rela outrel;
1729 		  bfd_byte *loc;
1730 
1731 		  off &= ~3;
1732 
1733 		  if (h != NULL)
1734 		    h->got.offset |= 2;
1735 		  else
1736 		    local_got_offsets[r_symndx] |= 2;
1737 
1738 		  /* Clear the target contents of the GOT (just as a
1739 		     gesture; it's already cleared on allocation): this
1740 		     relocation is not like the other dynrelocs.  */
1741 		  bfd_put_32 (output_bfd, 0, sgot->contents + off);
1742 		  bfd_put_32 (output_bfd, 0, sgot->contents + off + 4);
1743 
1744 		  if (srelgot == NULL)
1745 		    srelgot = bfd_get_linker_section (dynobj, ".rela.got");
1746 		  BFD_ASSERT (srelgot != NULL);
1747 
1748 		  if (h != NULL && h->dynindx != -1)
1749 		    {
1750 		      outrel.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_DTP);
1751 		      relocation = 0;
1752 		    }
1753 		  else
1754 		    {
1755 		      outrel.r_info = ELF32_R_INFO (0, R_CRIS_DTP);
1756 
1757 		      /* NULL if we had an error.  */
1758 		      relocation -= elf_hash_table (info)->tls_sec == NULL
1759 			? 0 : elf_hash_table (info)->tls_sec->vma;
1760 		    }
1761 
1762 		  outrel.r_offset = (sgot->output_section->vma
1763 				     + sgot->output_offset
1764 				     + off);
1765 		  outrel.r_addend = relocation;
1766 		  loc = srelgot->contents;
1767 		  loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
1768 
1769 		  /* NULL if we had an error.  */
1770 		  if (srelgot->contents != NULL)
1771 		    bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1772 		}
1773 	      else
1774 		off &= ~3;
1775 
1776 	      relocation = sgot->output_offset + off
1777 		+ (r_type == R_CRIS_32_GD ? sgot->output_section->vma : 0);
1778 	    }
1779 
1780 	  /* The GOT-relative offset to the GOT entry is the
1781 	     relocation, or for R_CRIS_32_GD, the actual address of
1782 	     the GOT entry.  */
1783 	  break;
1784 
1785 	case R_CRIS_32_IE:
1786 	  if (bfd_link_pic (info))
1787 	    {
1788 	      bfd_set_error (bfd_error_invalid_operation);
1789 
1790 	      /* We've already informed in cris_elf_check_relocs that
1791 		 this is an error.  */
1792 	      return FALSE;
1793 	    }
1794 	  /* Fall through.  */
1795 
1796 	case R_CRIS_32_GOT_TPREL:
1797 	case R_CRIS_16_GOT_TPREL:
1798 	  if (rel->r_addend != 0)
1799 	    {
1800 	      /* We can't do anything for a relocation which is
1801 		 against a symbol *plus offset*.  GOT holds
1802 		 relocations for symbols.  Make this an error; the
1803 		 compiler isn't allowed to pass us these kinds of
1804 		 things.  */
1805 	      (*_bfd_error_handler)
1806 		(_("%B, section %A: relocation %s with non-zero addend %d"
1807 		   " against symbol `%s'"),
1808 		 input_bfd,
1809 		 input_section,
1810 		 cris_elf_howto_table[r_type].name,
1811 		 rel->r_addend,
1812 		 symname[0] != '\0' ? symname : _("[whose name is lost]"));
1813 	      bfd_set_error (bfd_error_bad_value);
1814 	      return FALSE;
1815 	    }
1816 
1817 	  if (!bfd_link_pic (info)
1818 	      && (h == NULL || h->def_regular || ELF_COMMON_DEF_P (h)))
1819 	    {
1820 	      /* Known contents of the GOT.  */
1821 	      bfd_vma off;
1822 
1823 	      /* The symbol is defined in the program, so just write
1824 		 the -prog_tls_size+known_tpoffset into the GOT.  */
1825 	      relocation -= elf_hash_table (info)->tls_sec->vma;
1826 	      relocation -= elf_hash_table (info)->tls_size;
1827 
1828 	      if (h != NULL)
1829 		off = h->got.offset;
1830 	      else
1831 		off = local_got_offsets[r_symndx];
1832 
1833 	      /* Bit 0 is used to mark whether we've emitted the required
1834 		 entry (and if needed R_CRIS_32_TPREL reloc).  Bit 1
1835 		 is used similarly for R_CRIS_DTP, see above.  */
1836 	      if ((off & 1) == 0)
1837 		{
1838 		  off &= ~3;
1839 
1840 		  if (h != NULL)
1841 		    h->got.offset |= 1;
1842 		  else
1843 		    local_got_offsets[r_symndx] |= 1;
1844 
1845 		  bfd_put_32 (output_bfd, relocation, sgot->contents + off);
1846 		}
1847 	      else
1848 		off &= ~3;
1849 
1850 	      relocation = sgot->output_offset + off
1851 		+ (r_type == R_CRIS_32_IE ? sgot->output_section->vma : 0);
1852 	    }
1853 	  else
1854 	    {
1855 	      /* Emit a real relocation.  */
1856 	      bfd_vma off;
1857 
1858 	      if (h != NULL)
1859 		off = h->got.offset;
1860 	      else
1861 		off = local_got_offsets[r_symndx];
1862 
1863 	      /* See above re usage of bit 0 and 1.  */
1864 	      if ((off & 1) == 0)
1865 		{
1866 		  Elf_Internal_Rela outrel;
1867 		  bfd_byte *loc;
1868 
1869 		  off &= ~3;
1870 
1871 		  if (h != NULL)
1872 		    h->got.offset |= 1;
1873 		  else
1874 		    local_got_offsets[r_symndx] |= 1;
1875 
1876 		  if (srelgot == NULL)
1877 		    srelgot = bfd_get_linker_section (dynobj, ".rela.got");
1878 		  BFD_ASSERT (srelgot != NULL);
1879 
1880 		  if (h != NULL && h->dynindx != -1)
1881 		    {
1882 		      outrel.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_32_TPREL);
1883 		      relocation = 0;
1884 		    }
1885 		  else
1886 		    {
1887 		      outrel.r_info = ELF32_R_INFO (0, R_CRIS_32_TPREL);
1888 
1889 		      /* NULL if we had an error.  */
1890 		      relocation -= elf_hash_table (info)->tls_sec == NULL
1891 			? 0 : elf_hash_table (info)->tls_sec->vma;
1892 		    }
1893 
1894 		  /* Just "define" the initial contents in some
1895 		     semi-logical way.  */
1896 		  bfd_put_32 (output_bfd, relocation, sgot->contents + off);
1897 
1898 		  outrel.r_offset = (sgot->output_section->vma
1899 				     + sgot->output_offset
1900 				     + off);
1901 		  outrel.r_addend = relocation;
1902 		  loc = srelgot->contents;
1903 		  loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
1904 		  /* NULL if we had an error.  */
1905 		  if (srelgot->contents != NULL)
1906 		    bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1907 		}
1908 	      else
1909 		off &= ~3;
1910 
1911 	      relocation = sgot->output_offset + off
1912 		+ (r_type == R_CRIS_32_IE ? sgot->output_section->vma : 0);
1913 	    }
1914 
1915 	  /* The GOT-relative offset to the GOT entry is the relocation,
1916 	     or for R_CRIS_32_GD, the actual address of the GOT entry.  */
1917 	  break;
1918 
1919 	case R_CRIS_16_TPREL:
1920 	case R_CRIS_32_TPREL:
1921 	  /* This relocation must only be performed against symbols
1922 	     defined in an ordinary (non-DSO) object.  */
1923 	  if (bfd_link_pic (info))
1924 	    {
1925 	      bfd_set_error (bfd_error_invalid_operation);
1926 
1927 	      /* We've already informed in cris_elf_check_relocs that
1928 		 this is an error.  */
1929 	      return FALSE;
1930 	    }
1931 
1932 	  if (h != NULL
1933 	      && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1934 	      && !(h->def_regular || ELF_COMMON_DEF_P (h))
1935 	      /* If it's undefined, then an error message has already
1936 		 been emitted.  */
1937 	      && h->root.type != bfd_link_hash_undefined)
1938 	    {
1939 	      (*_bfd_error_handler)
1940 		(_("%B, section %A: relocation %s is"
1941 		   " not allowed for symbol: `%s'"
1942 		   " which is defined outside the program,"
1943 		   " perhaps a declaration mixup?"),
1944 		 input_bfd,
1945 		 input_section,
1946 		 cris_elf_howto_table[r_type].name,
1947 		 symname);
1948 	      bfd_set_error (bfd_error_bad_value);
1949 	      return FALSE;
1950 	    }
1951 
1952 	  /* NULL if we had an error.  */
1953 	  relocation -= elf_hash_table (info)->tls_sec == NULL
1954 	    ? 0
1955 	    : (elf_hash_table (info)->tls_sec->vma
1956 	       + elf_hash_table (info)->tls_size);
1957 
1958 	  /* The TLS-relative offset is the relocation.  */
1959 	  break;
1960 
1961 	default:
1962 	  BFD_FAIL ();
1963 	  return FALSE;
1964 	}
1965 
1966       r = cris_final_link_relocate (howto, input_bfd, input_section,
1967 				     contents, rel, relocation);
1968 
1969       if (r != bfd_reloc_ok)
1970 	{
1971 	  const char * msg = (const char *) NULL;
1972 
1973 	  switch (r)
1974 	    {
1975 	    case bfd_reloc_overflow:
1976 	      (*info->callbacks->reloc_overflow)
1977 		(info, (h ? &h->root : NULL), symname, howto->name,
1978 		 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
1979 	      if (additional_relocation_error_msg_count > 0)
1980 		{
1981 		  additional_relocation_error_msg_count--;
1982 		  switch (r_type)
1983 		    {
1984 		    case R_CRIS_16_GOTPLT:
1985 		    case R_CRIS_16_GOT:
1986 
1987 		      /* Not just TLS is involved here, so we make
1988 			 generation and message depend on -fPIC/-fpic
1989 			 only.  */
1990 		    case R_CRIS_16_GOT_TPREL:
1991 		    case R_CRIS_16_GOT_GD:
1992 		      (*_bfd_error_handler)
1993 			(_("(too many global variables for -fpic:"
1994 			   " recompile with -fPIC)"));
1995 		      break;
1996 
1997 		    case R_CRIS_16_TPREL:
1998 		    case R_CRIS_16_DTPREL:
1999 		      (*_bfd_error_handler)
2000 			(_("(thread-local data too big for -fpic or"
2001 			   " -msmall-tls: recompile with -fPIC or"
2002 			   " -mno-small-tls)"));
2003 		      break;
2004 
2005 		      /* No known cause for overflow for other relocs.  */
2006 		    default:
2007 		      break;
2008 		    }
2009 		}
2010 	      break;
2011 
2012 	    case bfd_reloc_undefined:
2013 	      (*info->callbacks->undefined_symbol)
2014 		(info, symname, input_bfd, input_section, rel->r_offset, TRUE);
2015 	      break;
2016 
2017 	    case bfd_reloc_outofrange:
2018 	      msg = _("internal error: out of range error");
2019 	      break;
2020 
2021 	    case bfd_reloc_notsupported:
2022 	      msg = _("internal error: unsupported relocation error");
2023 	      break;
2024 
2025 	    case bfd_reloc_dangerous:
2026 	      msg = _("internal error: dangerous relocation");
2027 	      break;
2028 
2029 	    default:
2030 	      msg = _("internal error: unknown error");
2031 	      break;
2032 	    }
2033 
2034 	  if (msg)
2035 	    (*info->callbacks->warning) (info, msg, symname, input_bfd,
2036 					 input_section, rel->r_offset);
2037 	}
2038     }
2039 
2040   return TRUE;
2041 }
2042 
2043 /* Finish up dynamic symbol handling.  We set the contents of various
2044    dynamic sections here.  */
2045 
2046 static bfd_boolean
elf_cris_finish_dynamic_symbol(bfd * output_bfd,struct bfd_link_info * info,struct elf_link_hash_entry * h,Elf_Internal_Sym * sym)2047 elf_cris_finish_dynamic_symbol (bfd *output_bfd,
2048 				struct bfd_link_info *info,
2049 				struct elf_link_hash_entry *h,
2050 				Elf_Internal_Sym *sym)
2051 {
2052   struct elf_cris_link_hash_table * htab;
2053   bfd *dynobj;
2054 
2055   /* Where in the plt entry to put values.  */
2056   int plt_off1 = 2, plt_off2 = 10, plt_off3 = 16;
2057 
2058   /* What offset to add to the distance to the first PLT entry for the
2059      value at plt_off3.   */
2060   int plt_off3_value_bias = 4;
2061 
2062   /* Where in the PLT entry the call-dynlink-stub is (happens to be same
2063      for PIC and non-PIC for v32 and pre-v32).  */
2064   int plt_stub_offset = 8;
2065   int plt_entry_size = PLT_ENTRY_SIZE;
2066   const bfd_byte *plt_entry = elf_cris_plt_entry;
2067   const bfd_byte *plt_pic_entry = elf_cris_pic_plt_entry;
2068 
2069   htab = elf_cris_hash_table (info);
2070   if (htab == NULL)
2071     return FALSE;
2072 
2073   /* Adjust the various PLT entry offsets.  */
2074   if (bfd_get_mach (output_bfd) == bfd_mach_cris_v32)
2075     {
2076       plt_off2 = 14;
2077       plt_off3 = 20;
2078       plt_off3_value_bias = -2;
2079       plt_stub_offset = 12;
2080       plt_entry_size = PLT_ENTRY_SIZE_V32;
2081       plt_entry = elf_cris_plt_entry_v32;
2082       plt_pic_entry = elf_cris_pic_plt_entry_v32;
2083     }
2084 
2085   dynobj = elf_hash_table (info)->dynobj;
2086 
2087   if (h->plt.offset != (bfd_vma) -1)
2088     {
2089       asection *splt;
2090       asection *sgotplt;
2091       asection *srela;
2092       bfd_vma got_base;
2093 
2094       bfd_vma gotplt_offset
2095 	= elf_cris_hash_entry (h)->gotplt_offset;
2096       Elf_Internal_Rela rela;
2097       bfd_byte *loc;
2098       bfd_boolean has_gotplt = gotplt_offset != 0;
2099 
2100       /* Get the index in the .rela.plt relocations for the .got.plt
2101 	 entry that corresponds to this symbol.
2102 	 We have to count backwards here, and the result is only valid
2103 	 as an index into .rela.plt.  We also have to undo the effect
2104 	 of the R_CRIS_DTPMOD entry at .got index 3 (offset 12 into
2105 	 .got.plt) for which gotplt_offset is adjusted, because while
2106 	 that entry goes into .got.plt, its relocation goes into
2107 	 .rela.got, not .rela.plt.  (It's not PLT-specific; not to be
2108 	 processed as part of the runtime lazy .rela.plt relocation).
2109 	 FIXME: There be literal constants here...  */
2110       bfd_vma rela_plt_index
2111 	= (htab->dtpmod_refcount != 0
2112 	   ? gotplt_offset/4 - 2 - 3 : gotplt_offset/4 - 3);
2113 
2114       /* Get the offset into the .got table of the entry that corresponds
2115 	 to this function.  Note that we embed knowledge that "incoming"
2116 	 .got goes after .got.plt in the output without padding (pointer
2117 	 aligned).  However, that knowledge is present in several other
2118 	 places too.  */
2119       bfd_vma got_offset
2120 	= (has_gotplt
2121 	   ? gotplt_offset
2122 	   : h->got.offset + htab->next_gotplt_entry);
2123 
2124       /* This symbol has an entry in the procedure linkage table.  Set it
2125 	 up.  */
2126 
2127       BFD_ASSERT (h->dynindx != -1);
2128 
2129       splt = bfd_get_linker_section (dynobj, ".plt");
2130       sgotplt = bfd_get_linker_section (dynobj, ".got.plt");
2131       srela = bfd_get_linker_section (dynobj, ".rela.plt");
2132       BFD_ASSERT (splt != NULL && sgotplt != NULL
2133 		  && (! has_gotplt || srela != NULL));
2134 
2135       got_base = sgotplt->output_section->vma + sgotplt->output_offset;
2136 
2137       /* Fill in the entry in the procedure linkage table.  */
2138       if (! bfd_link_pic (info))
2139 	{
2140 	  memcpy (splt->contents + h->plt.offset, plt_entry,
2141 		  plt_entry_size);
2142 
2143 	  /* We need to enter the absolute address of the GOT entry here.  */
2144 	  bfd_put_32 (output_bfd, got_base + got_offset,
2145 		      splt->contents + h->plt.offset + plt_off1);
2146 	}
2147       else
2148 	{
2149 	  memcpy (splt->contents + h->plt.offset, plt_pic_entry,
2150 		  plt_entry_size);
2151 	  bfd_put_32 (output_bfd, got_offset,
2152 		      splt->contents + h->plt.offset + plt_off1);
2153 	}
2154 
2155       /* Fill in the plt entry and make a relocation, if this is a "real"
2156 	 PLT entry.  */
2157       if (has_gotplt)
2158 	{
2159 	  /* Fill in the offset to the reloc table.  */
2160 	  bfd_put_32 (output_bfd,
2161 		      rela_plt_index * sizeof (Elf32_External_Rela),
2162 		      splt->contents + h->plt.offset + plt_off2);
2163 
2164 	  /* Fill in the offset to the first PLT entry, where to "jump".  */
2165 	  bfd_put_32 (output_bfd,
2166 		      - (h->plt.offset + plt_off3 + plt_off3_value_bias),
2167 		      splt->contents + h->plt.offset + plt_off3);
2168 
2169 	  /* Fill in the entry in the global offset table with the address of
2170 	     the relocating stub.  */
2171 	  bfd_put_32 (output_bfd,
2172 		      (splt->output_section->vma
2173 		       + splt->output_offset
2174 		       + h->plt.offset
2175 		       + plt_stub_offset),
2176 		      sgotplt->contents + got_offset);
2177 
2178 	  /* Fill in the entry in the .rela.plt section.  */
2179 	  rela.r_offset = (sgotplt->output_section->vma
2180 			   + sgotplt->output_offset
2181 			   + got_offset);
2182 	  rela.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_JUMP_SLOT);
2183 	  rela.r_addend = 0;
2184 	  loc = srela->contents + rela_plt_index * sizeof (Elf32_External_Rela);
2185 	  bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
2186 	}
2187 
2188       if (!h->def_regular)
2189 	{
2190 	  /* Mark the symbol as undefined, rather than as defined in
2191 	     the .plt section.  Leave the value alone.  */
2192 	  sym->st_shndx = SHN_UNDEF;
2193 
2194 	  /* FIXME: From elf32-sparc.c 2001-02-19 (1.18).  I still don't
2195 	     know whether resetting the value is significant; if it really
2196 	     is, rather than a quirk or bug in the sparc port, then I
2197 	     believe we'd see this elsewhere.  */
2198 	  /* If the symbol is weak, we do need to clear the value.
2199 	     Otherwise, the PLT entry would provide a definition for
2200 	     the symbol even if the symbol wasn't defined anywhere,
2201 	     and so the symbol would never be NULL.  */
2202 	  if (!h->ref_regular_nonweak)
2203 	    sym->st_value = 0;
2204 	}
2205     }
2206 
2207   /* For an ordinary program, we emit .got relocs only for symbols that
2208      are in the dynamic-symbols table and are either defined by the
2209      program or are undefined weak symbols, or are function symbols
2210      where we do not output a PLT: the PLT reloc was output above and all
2211      references to the function symbol are redirected to the PLT.  */
2212   if (h->got.offset != (bfd_vma) -1
2213       && (elf_cris_hash_entry (h)->reg_got_refcount > 0)
2214       && (bfd_link_pic (info)
2215 	  || (h->dynindx != -1
2216 	      && h->plt.offset == (bfd_vma) -1
2217 	      && !h->def_regular
2218 	      && h->root.type != bfd_link_hash_undefweak)))
2219     {
2220       asection *sgot;
2221       asection *srela;
2222       Elf_Internal_Rela rela;
2223       bfd_byte *loc;
2224       bfd_byte *where;
2225 
2226       /* This symbol has an entry in the global offset table.  Set it up.  */
2227 
2228       sgot = bfd_get_linker_section (dynobj, ".got");
2229       srela = bfd_get_linker_section (dynobj, ".rela.got");
2230       BFD_ASSERT (sgot != NULL && srela != NULL);
2231 
2232       rela.r_offset = (sgot->output_section->vma
2233 		       + sgot->output_offset
2234 		       + (h->got.offset &~ (bfd_vma) 1));
2235 
2236       /* If this is a static link, or it is a -Bsymbolic link and the
2237 	 symbol is defined locally or was forced to be local because
2238 	 of a version file, we just want to emit a RELATIVE reloc.
2239 	 The entry in the global offset table will already have been
2240 	 initialized in the relocate_section function.  */
2241       where = sgot->contents + (h->got.offset &~ (bfd_vma) 1);
2242       if (! elf_hash_table (info)->dynamic_sections_created
2243 	  || (bfd_link_pic (info)
2244 	      && (SYMBOLIC_BIND (info, h) || h->dynindx == -1)
2245 	      && h->def_regular))
2246 	{
2247 	  rela.r_info = ELF32_R_INFO (0, R_CRIS_RELATIVE);
2248 	  rela.r_addend = bfd_get_signed_32 (output_bfd, where);
2249 	}
2250       else
2251 	{
2252 	  bfd_put_32 (output_bfd, (bfd_vma) 0, where);
2253 	  rela.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_GLOB_DAT);
2254 	  rela.r_addend = 0;
2255 	}
2256 
2257       loc = srela->contents;
2258       loc += srela->reloc_count++ * sizeof (Elf32_External_Rela);
2259       bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
2260     }
2261 
2262   if (h->needs_copy)
2263     {
2264       asection *s;
2265       Elf_Internal_Rela rela;
2266       bfd_byte *loc;
2267 
2268       /* This symbol needs a copy reloc.  Set it up.  */
2269 
2270       BFD_ASSERT (h->dynindx != -1
2271 		  && (h->root.type == bfd_link_hash_defined
2272 		      || h->root.type == bfd_link_hash_defweak));
2273 
2274       s = bfd_get_linker_section (dynobj, ".rela.bss");
2275       BFD_ASSERT (s != NULL);
2276 
2277       rela.r_offset = (h->root.u.def.value
2278 		       + h->root.u.def.section->output_section->vma
2279 		       + h->root.u.def.section->output_offset);
2280       rela.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_COPY);
2281       rela.r_addend = 0;
2282       loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
2283       bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
2284     }
2285 
2286   /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute.  */
2287   if (h == elf_hash_table (info)->hdynamic
2288       || h == elf_hash_table (info)->hgot)
2289     sym->st_shndx = SHN_ABS;
2290 
2291   return TRUE;
2292 }
2293 
2294 /* Finish up the dynamic sections.  Do *not* emit relocs here, as their
2295    offsets were changed, as part of -z combreloc handling, from those we
2296    computed.  */
2297 
2298 static bfd_boolean
elf_cris_finish_dynamic_sections(bfd * output_bfd,struct bfd_link_info * info)2299 elf_cris_finish_dynamic_sections (bfd *output_bfd,
2300 				  struct bfd_link_info *info)
2301 {
2302   bfd *dynobj;
2303   asection *sgot;
2304   asection *sdyn;
2305 
2306   dynobj = elf_hash_table (info)->dynobj;
2307 
2308   sgot = bfd_get_linker_section (dynobj, ".got.plt");
2309   BFD_ASSERT (sgot != NULL);
2310   sdyn = bfd_get_linker_section (dynobj, ".dynamic");
2311 
2312   if (elf_hash_table (info)->dynamic_sections_created)
2313     {
2314       asection *splt;
2315       Elf32_External_Dyn *dyncon, *dynconend;
2316 
2317       splt = bfd_get_linker_section (dynobj, ".plt");
2318       BFD_ASSERT (splt != NULL && sdyn != NULL);
2319 
2320       dyncon = (Elf32_External_Dyn *) sdyn->contents;
2321       dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
2322       for (; dyncon < dynconend; dyncon++)
2323 	{
2324 	  Elf_Internal_Dyn dyn;
2325 	  asection *s;
2326 
2327 	  bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
2328 
2329 	  switch (dyn.d_tag)
2330 	    {
2331 	    default:
2332 	      break;
2333 
2334 	    case DT_PLTGOT:
2335 	      dyn.d_un.d_ptr = sgot->output_section->vma + sgot->output_offset;
2336 	      bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2337 	      break;
2338 
2339 	    case DT_JMPREL:
2340 	      /* Yes, we *can* have a .plt and no .plt.rela, for instance
2341 		 if all symbols are found in the .got (not .got.plt).  */
2342 	      s = bfd_get_linker_section (dynobj, ".rela.plt");
2343 	      dyn.d_un.d_ptr = s != NULL ? (s->output_section->vma
2344 					    + s->output_offset) : 0;
2345 	      bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2346 	      break;
2347 
2348 	    case DT_PLTRELSZ:
2349 	      s = bfd_get_linker_section (dynobj, ".rela.plt");
2350 	      if (s == NULL)
2351 		dyn.d_un.d_val = 0;
2352 	      else
2353 		dyn.d_un.d_val = s->size;
2354 	      bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2355 	      break;
2356 
2357 	    case DT_RELASZ:
2358 	      /* The procedure linkage table relocs (DT_JMPREL) should
2359 		 not be included in the overall relocs (DT_RELA).
2360 		 Therefore, we override the DT_RELASZ entry here to
2361 		 make it not include the JMPREL relocs.  Since the
2362 		 linker script arranges for .rela.plt to follow all
2363 		 other relocation sections, we don't have to worry
2364 		 about changing the DT_RELA entry.  */
2365 	      s = bfd_get_linker_section (dynobj, ".rela.plt");
2366 	      if (s != NULL)
2367 		dyn.d_un.d_val -= s->size;
2368 	      bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2369 	      break;
2370 	    }
2371 	}
2372 
2373       /* Fill in the first entry in the procedure linkage table.  */
2374       if (splt->size > 0)
2375 	{
2376 	  if (bfd_get_mach (output_bfd) == bfd_mach_cris_v32)
2377 	    {
2378 	      if (bfd_link_pic (info))
2379 		memcpy (splt->contents, elf_cris_pic_plt0_entry_v32,
2380 			PLT_ENTRY_SIZE_V32);
2381 	      else
2382 		{
2383 		  memcpy (splt->contents, elf_cris_plt0_entry_v32,
2384 			  PLT_ENTRY_SIZE_V32);
2385 		  bfd_put_32 (output_bfd,
2386 			      sgot->output_section->vma
2387 			      + sgot->output_offset + 4,
2388 			      splt->contents + 4);
2389 
2390 		  elf_section_data (splt->output_section)->this_hdr.sh_entsize
2391 		    = PLT_ENTRY_SIZE_V32;
2392 		}
2393 	    }
2394 	  else
2395 	    {
2396 	      if (bfd_link_pic (info))
2397 		memcpy (splt->contents, elf_cris_pic_plt0_entry,
2398 			PLT_ENTRY_SIZE);
2399 	      else
2400 		{
2401 		  memcpy (splt->contents, elf_cris_plt0_entry,
2402 			  PLT_ENTRY_SIZE);
2403 		  bfd_put_32 (output_bfd,
2404 			      sgot->output_section->vma
2405 			      + sgot->output_offset + 4,
2406 			      splt->contents + 6);
2407 		  bfd_put_32 (output_bfd,
2408 			      sgot->output_section->vma
2409 			      + sgot->output_offset + 8,
2410 			      splt->contents + 14);
2411 
2412 		  elf_section_data (splt->output_section)->this_hdr.sh_entsize
2413 		    = PLT_ENTRY_SIZE;
2414 		}
2415             }
2416 	}
2417     }
2418 
2419   /* Fill in the first three entries in the global offset table.  */
2420   if (sgot->size > 0)
2421     {
2422       if (sdyn == NULL)
2423 	bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
2424       else
2425 	bfd_put_32 (output_bfd,
2426 		    sdyn->output_section->vma + sdyn->output_offset,
2427 		    sgot->contents);
2428       bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4);
2429       bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8);
2430     }
2431 
2432   elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
2433 
2434   return TRUE;
2435 }
2436 
2437 /* Return the section that should be marked against GC for a given
2438    relocation.  */
2439 
2440 static asection *
cris_elf_gc_mark_hook(asection * sec,struct bfd_link_info * info,Elf_Internal_Rela * rel,struct elf_link_hash_entry * h,Elf_Internal_Sym * sym)2441 cris_elf_gc_mark_hook (asection *sec,
2442 		       struct bfd_link_info *info,
2443 		       Elf_Internal_Rela *rel,
2444 		       struct elf_link_hash_entry *h,
2445 		       Elf_Internal_Sym *sym)
2446 {
2447   enum elf_cris_reloc_type r_type = ELF32_R_TYPE (rel->r_info);
2448   if (h != NULL)
2449     switch (r_type)
2450       {
2451       case R_CRIS_GNU_VTINHERIT:
2452       case R_CRIS_GNU_VTENTRY:
2453 	return NULL;
2454 
2455       default:
2456 	break;
2457       }
2458 
2459   return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
2460 }
2461 
2462 /* Update the got entry reference counts for the section being removed.  */
2463 
2464 static bfd_boolean
cris_elf_gc_sweep_hook(bfd * abfd,struct bfd_link_info * info,asection * sec,const Elf_Internal_Rela * relocs)2465 cris_elf_gc_sweep_hook (bfd *abfd,
2466 			struct bfd_link_info *info,
2467 			asection *sec,
2468 			const Elf_Internal_Rela *relocs)
2469 {
2470   struct elf_cris_link_hash_table * htab;
2471   Elf_Internal_Shdr *symtab_hdr;
2472   struct elf_link_hash_entry **sym_hashes;
2473   bfd_signed_vma *local_got_refcounts;
2474   const Elf_Internal_Rela *rel, *relend;
2475   bfd *dynobj;
2476   asection *sgot;
2477   asection *srelgot;
2478 
2479   if (bfd_link_relocatable (info))
2480     return TRUE;
2481 
2482   dynobj = elf_hash_table (info)->dynobj;
2483   if (dynobj == NULL)
2484     return TRUE;
2485 
2486   htab = elf_cris_hash_table (info);
2487   if (htab == NULL)
2488     return FALSE;
2489 
2490   symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2491   sym_hashes = elf_sym_hashes (abfd);
2492   local_got_refcounts = elf_local_got_refcounts (abfd);
2493 
2494   sgot = bfd_get_linker_section (dynobj, ".got");
2495   srelgot = bfd_get_linker_section (dynobj, ".rela.got");
2496 
2497   relend = relocs + sec->reloc_count;
2498   for (rel = relocs; rel < relend; rel++)
2499     {
2500       unsigned long r_symndx;
2501       struct elf_link_hash_entry *h = NULL;
2502       bfd_signed_vma got_element_size = 4;
2503       bfd_signed_vma *specific_refcount = NULL;
2504       enum elf_cris_reloc_type r_type;
2505 
2506       r_symndx = ELF32_R_SYM (rel->r_info);
2507       if (r_symndx >= symtab_hdr->sh_info)
2508 	{
2509 	  h = sym_hashes[r_symndx - symtab_hdr->sh_info];
2510 	  while (h->root.type == bfd_link_hash_indirect
2511 		 || h->root.type == bfd_link_hash_warning)
2512 	    h = (struct elf_link_hash_entry *) h->root.u.i.link;
2513 	}
2514 
2515       r_type = ELF32_R_TYPE (rel->r_info);
2516       switch (r_type)
2517 	{
2518 	case R_CRIS_32_GOT:
2519 	case R_CRIS_16_GOT:
2520 	case R_CRIS_16_GOTPLT:
2521 	case R_CRIS_32_GOTPLT:
2522 	  specific_refcount = h != NULL
2523 	    ? &((struct elf_cris_link_hash_entry *) h)->reg_got_refcount
2524 	    : &local_got_refcounts[LGOT_REG_NDX (r_symndx)];
2525 	  break;
2526 
2527 	case R_CRIS_32_GD:
2528 	case R_CRIS_32_GOT_GD:
2529 	case R_CRIS_16_GOT_GD:
2530 	  got_element_size = 8;
2531 	  specific_refcount = h != NULL
2532 	    ? &((struct elf_cris_link_hash_entry *) h)->dtp_refcount
2533 	    : &local_got_refcounts[LGOT_DTP_NDX (r_symndx)];
2534 	  break;
2535 
2536 	case R_CRIS_32_IE:
2537 	case R_CRIS_16_GOT_TPREL:
2538 	case R_CRIS_32_GOT_TPREL:
2539 	  specific_refcount = h != NULL
2540 	    ? &((struct elf_cris_link_hash_entry *) h)->tprel_refcount
2541 	    : &local_got_refcounts[LGOT_TPREL_NDX (r_symndx)];
2542 	  break;
2543 
2544 	default:
2545 	  break;
2546 	}
2547 
2548       switch (r_type)
2549 	{
2550 	case R_CRIS_32_IE:
2551 	case R_CRIS_32_GD:
2552 	case R_CRIS_16_GOT_TPREL:
2553 	case R_CRIS_32_GOT_TPREL:
2554 	case R_CRIS_32_GOT_GD:
2555 	case R_CRIS_16_GOT_GD:
2556 	case R_CRIS_16_GOT:
2557 	case R_CRIS_32_GOT:
2558 	  if (h != NULL)
2559 	    {
2560 	      /* If the counters are 0 when we got here, we've
2561 		 miscounted somehow somewhere, an internal error.  */
2562 	      BFD_ASSERT (h->got.refcount > 0);
2563 	      --h->got.refcount;
2564 
2565 	      BFD_ASSERT (*specific_refcount > 0);
2566 	      --*specific_refcount;
2567 	      if (*specific_refcount == 0)
2568 		{
2569 		  /* We don't need the .got entry any more.  */
2570 		  sgot->size -= got_element_size;
2571 		  srelgot->size -= sizeof (Elf32_External_Rela);
2572 		}
2573 	      break;
2574 	    }
2575 
2576 	local_got_reloc:
2577 	  if (local_got_refcounts != NULL)
2578 	    {
2579 	      /* If the counters are 0 when we got here, we've
2580 		 miscounted somehow somewhere, an internal error.  */
2581 	      BFD_ASSERT (local_got_refcounts[r_symndx] > 0);
2582 	      --local_got_refcounts[r_symndx];
2583 
2584 	      BFD_ASSERT (*specific_refcount > 0);
2585 	      --*specific_refcount;
2586 	      if (*specific_refcount == 0)
2587 		{
2588 		  /* We don't need the .got entry any more.  */
2589 		  sgot->size -= got_element_size;
2590 		  if (bfd_link_pic (info))
2591 		    srelgot->size -= sizeof (Elf32_External_Rela);
2592 		}
2593 	    }
2594 	  break;
2595 
2596 	case R_CRIS_16_GOTPLT:
2597 	case R_CRIS_32_GOTPLT:
2598 	  /* For local symbols, treat these like GOT relocs.  */
2599 	  if (h == NULL)
2600 	    goto local_got_reloc;
2601 	  else
2602 	    /* For global symbols, adjust the reloc-specific refcount.  */
2603 	    elf_cris_hash_entry (h)->gotplt_refcount--;
2604 	  /* Fall through.  */
2605 
2606 	case R_CRIS_32_PLT_GOTREL:
2607 	  /* FIXME: We don't garbage-collect away the .got section.  */
2608 	  if (local_got_refcounts != NULL)
2609 	    local_got_refcounts[-1]--;
2610 	  /* Fall through.  */
2611 
2612 	case R_CRIS_8:
2613 	case R_CRIS_16:
2614 	case R_CRIS_32:
2615 	case R_CRIS_8_PCREL:
2616 	case R_CRIS_16_PCREL:
2617 	case R_CRIS_32_PCREL:
2618 	case R_CRIS_32_PLT_PCREL:
2619 	  /* Negate the increment we did in cris_elf_check_relocs.  */
2620 	  if (h != NULL)
2621 	    {
2622 	      if (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2623 		  && h->plt.refcount > 0)
2624 		--h->plt.refcount;
2625 	    }
2626 	  break;
2627 
2628 	case R_CRIS_32_DTPREL:
2629 	  /* This'd be a .dtpreld entry in e.g. debug info.  */
2630 	  if ((sec->flags & SEC_ALLOC) == 0)
2631 	    break;
2632 	  /* Fall through.  */
2633 	case R_CRIS_16_DTPREL:
2634 	  htab->dtpmod_refcount--;
2635 	  if (htab->dtpmod_refcount == 0)
2636 	    htab->next_gotplt_entry -= 8;
2637 	  BFD_ASSERT (local_got_refcounts != NULL);
2638 	  local_got_refcounts[-1]--;
2639 	  break;
2640 
2641 	default:
2642 	  break;
2643 	}
2644     }
2645 
2646   return TRUE;
2647 }
2648 
2649 /* The elf_backend_plt_sym_val hook function.  */
2650 
2651 static bfd_vma
cris_elf_plt_sym_val(bfd_vma i ATTRIBUTE_UNUSED,const asection * plt,const arelent * rel)2652 cris_elf_plt_sym_val (bfd_vma i ATTRIBUTE_UNUSED, const asection *plt,
2653 		      const arelent *rel)
2654 {
2655   bfd_size_type plt_entry_size;
2656   bfd_size_type pltoffs;
2657   bfd *abfd = plt->owner;
2658 
2659   /* Same for CRIS and CRIS v32; see elf_cris_(|pic_)plt_entry(|_v32)[].  */
2660   bfd_size_type plt_entry_got_offset = 2;
2661   bfd_size_type plt_sec_size;
2662   bfd_size_type got_vma_for_dyn;
2663   asection *got;
2664 
2665   /* FIXME: the .got section should be readily available also when
2666      we're not linking.  */
2667   if ((got = bfd_get_section_by_name (abfd, ".got")) == NULL)
2668     return (bfd_vma) -1;
2669 
2670   plt_sec_size =  bfd_section_size (plt->owner, plt);
2671   plt_entry_size
2672     = (bfd_get_mach (abfd) == bfd_mach_cris_v32
2673        ? PLT_ENTRY_SIZE_V32 : PLT_ENTRY_SIZE);
2674 
2675   /* Data in PLT is GOT-relative for DYN, but absolute for EXE.  */
2676   got_vma_for_dyn = (abfd->flags & EXEC_P) ? 0 : got->vma;
2677 
2678   /* Because we can have merged GOT entries; a single .got entry for
2679      both GOT and the PLT part of the GOT (.got.plt), the index of the
2680      reloc in .rela.plt is not the same as the index in the PLT.
2681      Instead, we have to hunt down the GOT offset in the PLT that
2682      corresponds to that of this reloc.  Unfortunately, we will only
2683      be called for the .rela.plt relocs, so we'll miss synthetic
2684      symbols for .plt entries with merged GOT entries.  (FIXME:
2685      fixable by providing our own bfd_elf32_get_synthetic_symtab.
2686      Doesn't seem worthwile at time of this writing.)  FIXME: we've
2687      gone from O(1) to O(N) (N number of PLT entries) for finding each
2688      PLT address.  Shouldn't matter in practice though.  */
2689 
2690   for (pltoffs = plt_entry_size;
2691        pltoffs < plt_sec_size;
2692        pltoffs += plt_entry_size)
2693     {
2694       bfd_size_type got_offset;
2695       bfd_byte gotoffs_raw[4];
2696 
2697       if (!bfd_get_section_contents (abfd, (asection *) plt, gotoffs_raw,
2698 				     pltoffs + plt_entry_got_offset,
2699 				     sizeof (gotoffs_raw)))
2700 	return (bfd_vma) -1;
2701 
2702       got_offset = bfd_get_32 (abfd, gotoffs_raw);
2703       if (got_offset + got_vma_for_dyn == rel->address)
2704 	return plt->vma + pltoffs;
2705     }
2706 
2707   /* While it's tempting to BFD_ASSERT that we shouldn't get here,
2708      that'd not be graceful behavior for invalid input.  */
2709   return (bfd_vma) -1;
2710 }
2711 
2712 /* Make sure we emit a GOT entry if the symbol was supposed to have a PLT
2713    entry but we found we will not create any.  Called when we find we will
2714    not have any PLT for this symbol, by for example
2715    elf_cris_adjust_dynamic_symbol when we're doing a proper dynamic link,
2716    or elf_cris_size_dynamic_sections if no dynamic sections will be
2717    created (we're only linking static objects).  */
2718 
2719 static bfd_boolean
elf_cris_adjust_gotplt_to_got(struct elf_cris_link_hash_entry * h,void * p)2720 elf_cris_adjust_gotplt_to_got (struct elf_cris_link_hash_entry *h, void * p)
2721 {
2722   struct bfd_link_info *info = (struct bfd_link_info *) p;
2723 
2724   /* A GOTPLT reloc, when activated, is supposed to be included into
2725      the PLT refcount.  */
2726   BFD_ASSERT (h->gotplt_refcount == 0
2727 	      || h->gotplt_refcount <= h->root.plt.refcount);
2728 
2729   /* If nobody wanted a GOTPLT with this symbol, we're done.  */
2730   if (h->gotplt_refcount <= 0)
2731     return TRUE;
2732 
2733   if (h->reg_got_refcount > 0)
2734     {
2735       /* There's a GOT entry for this symbol.  Just adjust the refcounts.
2736 	 Probably not necessary at this stage, but keeping them accurate
2737 	 helps avoiding surprises later.  */
2738       h->root.got.refcount += h->gotplt_refcount;
2739       h->reg_got_refcount += h->gotplt_refcount;
2740       h->gotplt_refcount = 0;
2741     }
2742   else
2743     {
2744       /* No GOT entry for this symbol.  We need to create one.  */
2745       bfd *dynobj = elf_hash_table (info)->dynobj;
2746       asection *sgot;
2747       asection *srelgot;
2748 
2749       BFD_ASSERT (dynobj != NULL);
2750       sgot = bfd_get_linker_section (dynobj, ".got");
2751       srelgot = bfd_get_linker_section (dynobj, ".rela.got");
2752 
2753       /* Put accurate refcounts there.  */
2754       h->root.got.refcount += h->gotplt_refcount;
2755       h->reg_got_refcount = h->gotplt_refcount;
2756 
2757       h->gotplt_refcount = 0;
2758 
2759       /* We always have a .got and a .rela.got section if there were
2760 	 GOTPLT relocs in input.  */
2761       BFD_ASSERT (sgot != NULL && srelgot != NULL);
2762 
2763       /* Allocate space in the .got section.  */
2764       sgot->size += 4;
2765 
2766       /* Allocate relocation space.  */
2767       srelgot->size += sizeof (Elf32_External_Rela);
2768     }
2769 
2770   return TRUE;
2771 }
2772 
2773 /* Try to fold PLT entries with GOT entries.  There are two cases when we
2774    want to do this:
2775 
2776    - When all PLT references are GOTPLT references, and there are GOT
2777      references, and this is not the executable.  We don't have to
2778      generate a PLT at all.
2779 
2780    - When there are both (ordinary) PLT references and GOT references,
2781      and this isn't the executable.
2782      We want to make the PLT reference use the ordinary GOT entry rather
2783      than R_CRIS_JUMP_SLOT, a run-time dynamically resolved GOTPLT entry,
2784      since the GOT entry will have to be resolved at startup anyway.
2785 
2786    Though the latter case is handled when room for the PLT is allocated,
2787    not here.
2788 
2789    By folding into the GOT, we may need a round-trip to a PLT in the
2790    executable for calls, a loss in performance.  Still, losing a
2791    reloc is a win in size and at least in start-up time.
2792 
2793    Note that this function is called before symbols are forced local by
2794    version scripts.  The differing cases are handled by
2795    elf_cris_hide_symbol.  */
2796 
2797 static bfd_boolean
elf_cris_try_fold_plt_to_got(struct elf_cris_link_hash_entry * h,void * p)2798 elf_cris_try_fold_plt_to_got (struct elf_cris_link_hash_entry *h, void * p)
2799 {
2800   struct bfd_link_info *info = (struct bfd_link_info *) p;
2801 
2802   /* If there are no GOT references for this symbol, we can't fold any
2803      other reference so there's nothing to do.  Likewise if there are no
2804      PLT references; GOTPLT references included.  */
2805   if (h->root.got.refcount <= 0 || h->root.plt.refcount <= 0)
2806     return TRUE;
2807 
2808   /* GOTPLT relocs are supposed to be included into the PLT refcount.  */
2809   BFD_ASSERT (h->gotplt_refcount <= h->root.plt.refcount);
2810 
2811   if (h->gotplt_refcount == h->root.plt.refcount)
2812     {
2813       /* The only PLT references are GOTPLT references, and there are GOT
2814 	 references.  Convert PLT to GOT references.  */
2815       if (! elf_cris_adjust_gotplt_to_got (h, info))
2816 	return FALSE;
2817 
2818       /* Clear the PLT references, so no PLT will be created.  */
2819       h->root.plt.offset = (bfd_vma) -1;
2820     }
2821 
2822   return TRUE;
2823 }
2824 
2825 /* Our own version of hide_symbol, so that we can adjust a GOTPLT reloc
2826    to use a GOT entry (and create one) rather than requiring a GOTPLT
2827    entry.  */
2828 
2829 static void
elf_cris_hide_symbol(struct bfd_link_info * info,struct elf_link_hash_entry * h,bfd_boolean force_local)2830 elf_cris_hide_symbol (struct bfd_link_info *info,
2831 		      struct elf_link_hash_entry *h,
2832 		      bfd_boolean force_local)
2833 {
2834   elf_cris_adjust_gotplt_to_got ((struct elf_cris_link_hash_entry *) h, info);
2835 
2836   _bfd_elf_link_hash_hide_symbol (info, h, force_local);
2837 }
2838 
2839 /* Adjust a symbol defined by a dynamic object and referenced by a
2840    regular object.  The current definition is in some section of the
2841    dynamic object, but we're not including those sections.  We have to
2842    change the definition to something the rest of the link can
2843    understand.  */
2844 
2845 static bfd_boolean
elf_cris_adjust_dynamic_symbol(struct bfd_link_info * info,struct elf_link_hash_entry * h)2846 elf_cris_adjust_dynamic_symbol (struct bfd_link_info *info,
2847 				struct elf_link_hash_entry *h)
2848 {
2849   struct elf_cris_link_hash_table * htab;
2850   bfd *dynobj;
2851   asection *s;
2852   bfd_size_type plt_entry_size;
2853 
2854   htab = elf_cris_hash_table (info);
2855   if (htab == NULL)
2856     return FALSE;
2857 
2858   dynobj = elf_hash_table (info)->dynobj;
2859 
2860   /* Make sure we know what is going on here.  */
2861   BFD_ASSERT (dynobj != NULL
2862 	      && (h->needs_plt
2863 		  || h->u.weakdef != NULL
2864 		  || (h->def_dynamic
2865 		      && h->ref_regular
2866 		      && !h->def_regular)));
2867 
2868   plt_entry_size
2869     = (bfd_get_mach (dynobj) == bfd_mach_cris_v32
2870        ? PLT_ENTRY_SIZE_V32 : PLT_ENTRY_SIZE);
2871 
2872   /* If this is a function, put it in the procedure linkage table.  We
2873      will fill in the contents of the procedure linkage table later,
2874      when we know the address of the .got section.  */
2875   if (h->type == STT_FUNC
2876       || h->needs_plt)
2877     {
2878       /* If we link a program (not a DSO), we'll get rid of unnecessary
2879 	 PLT entries; we point to the actual symbols -- even for pic
2880 	 relocs, because a program built with -fpic should have the same
2881 	 result as one built without -fpic, specifically considering weak
2882 	 symbols.
2883 	 FIXME: m68k and i386 differ here, for unclear reasons.  */
2884       if (! bfd_link_pic (info)
2885 	  && !h->def_dynamic)
2886 	{
2887 	  /* This case can occur if we saw a PLT reloc in an input file,
2888 	     but the symbol was not defined by a dynamic object.  In such
2889 	     a case, we don't actually need to build a procedure linkage
2890 	     table, and we can just do an absolute or PC reloc instead, or
2891 	     change a .got.plt index to a .got index for GOTPLT relocs.  */
2892 	  BFD_ASSERT (h->needs_plt);
2893 	  h->needs_plt = 0;
2894 	  h->plt.offset = (bfd_vma) -1;
2895 	  return
2896 	    elf_cris_adjust_gotplt_to_got ((struct
2897 					    elf_cris_link_hash_entry *) h,
2898 					   info);
2899 	}
2900 
2901       /* If we had a R_CRIS_GLOB_DAT that didn't have to point to a PLT;
2902 	 where a pointer-equivalent symbol was unimportant (i.e. more
2903 	 like R_CRIS_JUMP_SLOT after symbol evaluation) we could get rid
2904 	 of the PLT.  We can't for the executable, because the GOT
2905 	 entries will point to the PLT there (and be constant).  */
2906       if (bfd_link_pic (info)
2907 	  && !elf_cris_try_fold_plt_to_got ((struct elf_cris_link_hash_entry*)
2908 					    h, info))
2909 	return FALSE;
2910 
2911       /* GC or folding may have rendered this entry unused.  */
2912       if (h->plt.refcount <= 0)
2913 	{
2914 	  h->needs_plt = 0;
2915 	  h->plt.offset = (bfd_vma) -1;
2916 	  return TRUE;
2917 	}
2918 
2919       /* Make sure this symbol is output as a dynamic symbol.  */
2920       if (h->dynindx == -1)
2921 	{
2922 	  if (! bfd_elf_link_record_dynamic_symbol (info, h))
2923 	    return FALSE;
2924 	}
2925 
2926       s = bfd_get_linker_section (dynobj, ".plt");
2927       BFD_ASSERT (s != NULL);
2928 
2929       /* If this is the first .plt entry, make room for the special
2930 	 first entry.  */
2931       if (s->size == 0)
2932 	s->size += plt_entry_size;
2933 
2934       /* If this symbol is not defined in a regular file, and we are
2935 	 not generating a shared library, then set the symbol to this
2936 	 location in the .plt.  */
2937       if (!bfd_link_pic (info)
2938 	  && !h->def_regular)
2939 	{
2940 	  h->root.u.def.section = s;
2941 	  h->root.u.def.value = s->size;
2942 	}
2943 
2944       /* If there's already a GOT entry, use that, not a .got.plt.  A
2945 	 GOT field still has a reference count when we get here; it's
2946 	 not yet changed to an offset.  We can't do this for an
2947 	 executable, because then the reloc associated with the PLT
2948 	 would get a non-PLT reloc pointing to the PLT.  FIXME: Move
2949 	 this to elf_cris_try_fold_plt_to_got.  */
2950       if (bfd_link_pic (info) && h->got.refcount > 0)
2951 	{
2952 	  h->got.refcount += h->plt.refcount;
2953 
2954 	  /* Mark the PLT offset to use the GOT entry by setting the low
2955 	     bit in the plt offset; it is always a multiple of
2956 	     plt_entry_size (which is at least a multiple of 2).  */
2957 	  BFD_ASSERT ((s->size % plt_entry_size) == 0);
2958 
2959 	  /* Change the PLT refcount to an offset.  */
2960 	  h->plt.offset = s->size;
2961 
2962 	  /* By not setting gotplt_offset (i.e. it remains at 0), we signal
2963 	     that the got entry should be used instead.  */
2964 	  BFD_ASSERT (((struct elf_cris_link_hash_entry *)
2965 		       h)->gotplt_offset == 0);
2966 
2967 	  /* Make room for this entry.  */
2968 	  s->size += plt_entry_size;
2969 
2970 	  return TRUE;
2971 	}
2972 
2973       /* No GOT reference for this symbol; prepare for an ordinary PLT.  */
2974       h->plt.offset = s->size;
2975 
2976       /* Make room for this entry.  */
2977       s->size += plt_entry_size;
2978 
2979       /* We also need to make an entry in the .got.plt section, which
2980 	 will be placed in the .got section by the linker script.  */
2981       ((struct elf_cris_link_hash_entry *) h)->gotplt_offset
2982 	= htab->next_gotplt_entry;
2983       htab->next_gotplt_entry += 4;
2984 
2985       s = bfd_get_linker_section (dynobj, ".got.plt");
2986       BFD_ASSERT (s != NULL);
2987       s->size += 4;
2988 
2989       /* We also need to make an entry in the .rela.plt section.  */
2990 
2991       s = bfd_get_linker_section (dynobj, ".rela.plt");
2992       BFD_ASSERT (s != NULL);
2993       s->size += sizeof (Elf32_External_Rela);
2994 
2995       return TRUE;
2996     }
2997 
2998   /* Reinitialize the plt offset now that it is not used as a reference
2999      count any more.  */
3000   h->plt.offset = (bfd_vma) -1;
3001 
3002   /* If this is a weak symbol, and there is a real definition, the
3003      processor independent code will have arranged for us to see the
3004      real definition first, and we can just use the same value.  */
3005   if (h->u.weakdef != NULL)
3006     {
3007       BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
3008 		  || h->u.weakdef->root.type == bfd_link_hash_defweak);
3009       h->root.u.def.section = h->u.weakdef->root.u.def.section;
3010       h->root.u.def.value = h->u.weakdef->root.u.def.value;
3011       return TRUE;
3012     }
3013 
3014   /* This is a reference to a symbol defined by a dynamic object which
3015      is not a function.  */
3016 
3017   /* If we are creating a shared library, we must presume that the
3018      only references to the symbol are via the global offset table.
3019      For such cases we need not do anything here; the relocations will
3020      be handled correctly by relocate_section.  */
3021   if (bfd_link_pic (info))
3022     return TRUE;
3023 
3024   /* If there are no references to this symbol that do not use the
3025      GOT, we don't need to generate a copy reloc.  */
3026   if (!h->non_got_ref)
3027     return TRUE;
3028 
3029   /* We must allocate the symbol in our .dynbss section, which will
3030      become part of the .bss section of the executable.  There will be
3031      an entry for this symbol in the .dynsym section.  The dynamic
3032      object will contain position independent code, so all references
3033      from the dynamic object to this symbol will go through the global
3034      offset table.  The dynamic linker will use the .dynsym entry to
3035      determine the address it must put in the global offset table, so
3036      both the dynamic object and the regular object will refer to the
3037      same memory location for the variable.  */
3038 
3039   s = bfd_get_linker_section (dynobj, ".dynbss");
3040   BFD_ASSERT (s != NULL);
3041 
3042   /* We must generate a R_CRIS_COPY reloc to tell the dynamic linker to
3043      copy the initial value out of the dynamic object and into the
3044      runtime process image.  We need to remember the offset into the
3045      .rela.bss section we are going to use.  */
3046   if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
3047     {
3048       asection *srel;
3049 
3050       srel = bfd_get_linker_section (dynobj, ".rela.bss");
3051       BFD_ASSERT (srel != NULL);
3052       srel->size += sizeof (Elf32_External_Rela);
3053       h->needs_copy = 1;
3054     }
3055 
3056   return _bfd_elf_adjust_dynamic_copy (info, h, s);
3057 }
3058 
3059 /* Adjust our "subclass" elements for an indirect symbol.  */
3060 
3061 static void
elf_cris_copy_indirect_symbol(struct bfd_link_info * info,struct elf_link_hash_entry * dir,struct elf_link_hash_entry * ind)3062 elf_cris_copy_indirect_symbol (struct bfd_link_info *info,
3063 			       struct elf_link_hash_entry *dir,
3064 			       struct elf_link_hash_entry *ind)
3065 {
3066   struct elf_cris_link_hash_entry *edir, *eind;
3067 
3068   edir = (struct elf_cris_link_hash_entry *) dir;
3069   eind = (struct elf_cris_link_hash_entry *) ind;
3070 
3071   /* Only indirect symbols are replaced; we're not interested in
3072      updating any of EIND's fields for other symbols.  */
3073   if (eind->root.root.type != bfd_link_hash_indirect)
3074     {
3075       /* Still, we need to copy flags for e.g. weak definitions.  */
3076       _bfd_elf_link_hash_copy_indirect (info, dir, ind);
3077       return;
3078     }
3079 
3080   BFD_ASSERT (edir->gotplt_offset == 0 || eind->gotplt_offset == 0);
3081 
3082 #define XMOVOPZ(F, OP, Z) edir->F OP eind->F; eind->F = Z
3083 #define XMOVE(F) XMOVOPZ (F, +=, 0)
3084   if (eind->pcrel_relocs_copied != NULL)
3085     {
3086       if (edir->pcrel_relocs_copied != NULL)
3087 	{
3088 	  struct elf_cris_pcrel_relocs_copied **pp;
3089 	  struct elf_cris_pcrel_relocs_copied *p;
3090 
3091 	  /* Add reloc counts against the indirect sym to the direct sym
3092 	     list.  Merge any entries against the same section.  */
3093 	  for (pp = &eind->pcrel_relocs_copied; *pp != NULL;)
3094 	    {
3095 	      struct elf_cris_pcrel_relocs_copied *q;
3096 	      p = *pp;
3097 	      for (q = edir->pcrel_relocs_copied; q != NULL; q = q->next)
3098 		if (q->section == p->section)
3099 		  {
3100 		    q->count += p->count;
3101 		    *pp = p->next;
3102 		    break;
3103 		  }
3104 	      if (q == NULL)
3105 		pp = &p->next;
3106 	    }
3107 	  *pp = edir->pcrel_relocs_copied;
3108 	}
3109       XMOVOPZ (pcrel_relocs_copied, =, NULL);
3110     }
3111   XMOVE (gotplt_refcount);
3112   XMOVE (gotplt_offset);
3113   XMOVE (reg_got_refcount);
3114   XMOVE (tprel_refcount);
3115   XMOVE (dtp_refcount);
3116 #undef XMOVE
3117 #undef XMOVOPZ
3118 
3119   _bfd_elf_link_hash_copy_indirect (info, dir, ind);
3120 }
3121 
3122 /* Look through the relocs for a section during the first phase.  */
3123 
3124 static bfd_boolean
cris_elf_check_relocs(bfd * abfd,struct bfd_link_info * info,asection * sec,const Elf_Internal_Rela * relocs)3125 cris_elf_check_relocs (bfd *abfd,
3126 		       struct bfd_link_info *info,
3127 		       asection *sec,
3128 		       const Elf_Internal_Rela *relocs)
3129 {
3130   struct elf_cris_link_hash_table * htab;
3131   bfd *dynobj;
3132   Elf_Internal_Shdr *symtab_hdr;
3133   struct elf_link_hash_entry **sym_hashes;
3134   bfd_signed_vma *local_got_refcounts;
3135   const Elf_Internal_Rela *rel;
3136   const Elf_Internal_Rela *rel_end;
3137   asection *sgot;
3138   asection *srelgot;
3139   asection *sreloc;
3140 
3141   if (bfd_link_relocatable (info))
3142     return TRUE;
3143 
3144   htab = elf_cris_hash_table (info);
3145   if (htab == NULL)
3146     return FALSE;
3147 
3148   dynobj = elf_hash_table (info)->dynobj;
3149   symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3150   sym_hashes = elf_sym_hashes (abfd);
3151   local_got_refcounts = elf_local_got_refcounts (abfd);
3152 
3153   sgot = NULL;
3154   srelgot = NULL;
3155   sreloc = NULL;
3156 
3157   rel_end = relocs + sec->reloc_count;
3158   for (rel = relocs; rel < rel_end; rel++)
3159     {
3160       struct elf_link_hash_entry *h;
3161       unsigned long r_symndx;
3162       enum elf_cris_reloc_type r_type;
3163       bfd_signed_vma got_element_size = 4;
3164       unsigned long r_symndx_lgot = INT_MAX;
3165 
3166       r_symndx = ELF32_R_SYM (rel->r_info);
3167       if (r_symndx < symtab_hdr->sh_info)
3168 	{
3169 	  h = NULL;
3170 	  r_symndx_lgot = LGOT_REG_NDX (r_symndx);
3171 	}
3172       else
3173 	{
3174 	  h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3175 	  while (h->root.type == bfd_link_hash_indirect
3176 		 || h->root.type == bfd_link_hash_warning)
3177 	    h = (struct elf_link_hash_entry *) h->root.u.i.link;
3178 
3179 	  /* PR15323, ref flags aren't set for references in the same
3180 	     object.  */
3181 	  h->root.non_ir_ref = 1;
3182 	}
3183 
3184       r_type = ELF32_R_TYPE (rel->r_info);
3185 
3186       /* Some relocs require linker-created sections; we need to hang them
3187 	 on the first input bfd we found that contained dynamic relocs.  */
3188       switch (r_type)
3189 	{
3190 	case R_CRIS_32_DTPREL:
3191 	  if ((sec->flags & SEC_ALLOC) == 0)
3192 	    /* This'd be a .dtpreld entry in e.g. debug info.  We have
3193 	       several different switch statements below, but none of
3194 	       that is needed; we need no preparations for resolving
3195 	       R_CRIS_32_DTPREL into a non-allocated section (debug
3196 	       info), so let's just move on to the next
3197 	       relocation.  */
3198 	    continue;
3199 	  /* Fall through.  */
3200 	case R_CRIS_16_DTPREL:
3201 	  /* The first .got.plt entry is right after the R_CRIS_DTPMOD
3202 	     entry at index 3. */
3203 	  if (htab->dtpmod_refcount == 0)
3204 	    htab->next_gotplt_entry += 8;
3205 
3206 	  htab->dtpmod_refcount++;
3207 	  /* Fall through.  */
3208 
3209 	case R_CRIS_32_IE:
3210 	case R_CRIS_32_GD:
3211 	case R_CRIS_16_GOT_GD:
3212 	case R_CRIS_32_GOT_GD:
3213 	case R_CRIS_32_GOT_TPREL:
3214 	case R_CRIS_16_GOT_TPREL:
3215 	case R_CRIS_16_GOT:
3216 	case R_CRIS_32_GOT:
3217 	case R_CRIS_32_GOTREL:
3218 	case R_CRIS_32_PLT_GOTREL:
3219 	case R_CRIS_32_PLT_PCREL:
3220 	case R_CRIS_16_GOTPLT:
3221 	case R_CRIS_32_GOTPLT:
3222 	  if (dynobj == NULL)
3223 	    {
3224 	      elf_hash_table (info)->dynobj = dynobj = abfd;
3225 
3226 	      /* We could handle this if we can get a handle on the
3227 		 output bfd in elf_cris_adjust_dynamic_symbol.  Failing
3228 		 that, we must insist on dynobj being a specific mach.  */
3229 	      if (bfd_get_mach (dynobj) == bfd_mach_cris_v10_v32)
3230 		{
3231 		  (*_bfd_error_handler)
3232 		    (_("%B, section %A:\n  v10/v32 compatible object %s"
3233 		       " must not contain a PIC relocation"),
3234 		     abfd, sec);
3235 		  return FALSE;
3236 		}
3237 	    }
3238 
3239 	  if (sgot == NULL)
3240 	    {
3241 	      /* We may have a dynobj but no .got section, if machine-
3242 		 independent parts of the linker found a reason to create
3243 		 a dynobj.  We want to create the .got section now, so we
3244 		 can assume it's always present whenever there's a dynobj.
3245 		 It's ok to call this function more than once.  */
3246 	      if (!_bfd_elf_create_got_section (dynobj, info))
3247 		return FALSE;
3248 
3249 	      sgot = bfd_get_linker_section (dynobj, ".got");
3250 	    }
3251 
3252 	  if (local_got_refcounts == NULL)
3253 	    {
3254 	      bfd_size_type amt;
3255 
3256 	      /* We use index local_got_refcounts[-1] to count all
3257 		 GOT-relative relocations that do not have explicit
3258 		 GOT entries.  */
3259 	      amt = LGOT_ALLOC_NELTS_FOR (symtab_hdr->sh_info) + 1;
3260 	      amt *= sizeof (bfd_signed_vma);
3261 	      local_got_refcounts = ((bfd_signed_vma *) bfd_zalloc (abfd, amt));
3262 	      if (local_got_refcounts == NULL)
3263 		return FALSE;
3264 
3265 	      local_got_refcounts++;
3266 	      elf_local_got_refcounts (abfd) = local_got_refcounts;
3267 	    }
3268 	  break;
3269 
3270 	default:
3271 	  break;
3272 	}
3273 
3274       /* Some relocs require a global offset table (but perhaps not a
3275 	 specific GOT entry).  */
3276       switch (r_type)
3277 	{
3278 	case R_CRIS_16_DTPREL:
3279 	case R_CRIS_32_DTPREL:
3280 	  /* Not requesting .got.rela for an executable: the contents
3281 	     of the first entry is constant there.  For a shared
3282 	     library, we need .got.rela for the R_CRIS_DTPMOD
3283 	     relocation at index 3.  */
3284 	  if (!bfd_link_pic (info))
3285 	    break;
3286 	  /* Fall through.  */
3287 
3288 	case R_CRIS_32_IE:
3289 	case R_CRIS_32_GD:
3290 	case R_CRIS_16_GOT_GD:
3291 	case R_CRIS_32_GOT_GD:
3292 	case R_CRIS_32_GOT_TPREL:
3293 	case R_CRIS_16_GOT_TPREL:
3294 	  /* Fall through.  */
3295 
3296 	  /* For R_CRIS_16_GOTPLT and R_CRIS_32_GOTPLT, we need a GOT
3297 	     entry only for local symbols.  Unfortunately, we don't know
3298 	     until later on if there's a version script that forces the
3299 	     symbol local.  We must have the .rela.got section in place
3300 	     before we know if the symbol looks global now, so we need
3301 	     to treat the reloc just like for R_CRIS_16_GOT and
3302 	     R_CRIS_32_GOT.  */
3303 	case R_CRIS_16_GOTPLT:
3304 	case R_CRIS_32_GOTPLT:
3305 	case R_CRIS_16_GOT:
3306 	case R_CRIS_32_GOT:
3307 	  if (srelgot == NULL
3308 	      && (h != NULL || bfd_link_pic (info)))
3309 	    {
3310 	      srelgot = bfd_get_linker_section (dynobj, ".rela.got");
3311 	      if (srelgot == NULL)
3312 		{
3313 		  flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
3314 				    | SEC_IN_MEMORY | SEC_LINKER_CREATED
3315 				    | SEC_READONLY);
3316 		  srelgot = bfd_make_section_anyway_with_flags (dynobj,
3317 								".rela.got",
3318 								flags);
3319 		  if (srelgot == NULL
3320 		      || !bfd_set_section_alignment (dynobj, srelgot, 2))
3321 		    return FALSE;
3322 		}
3323 	    }
3324 	  break;
3325 
3326 	default:
3327 	  break;
3328 	}
3329 
3330       /* Warn and error for invalid input.  */
3331       switch (r_type)
3332 	{
3333 	case R_CRIS_32_IE:
3334 	case R_CRIS_32_TPREL:
3335 	case R_CRIS_16_TPREL:
3336 	case R_CRIS_32_GD:
3337 	  if (bfd_link_pic (info))
3338 	    {
3339 	      (*_bfd_error_handler)
3340 		(_("%B, section %A:\n  relocation %s not valid"
3341 		   " in a shared object;"
3342 		   " typically an option mixup, recompile with -fPIC"),
3343 		 abfd,
3344 		 sec,
3345 		 cris_elf_howto_table[r_type].name);
3346 	      /* Don't return FALSE here; we want messages for all of
3347 		 these and the error behavior is ungraceful
3348 		 anyway.  */
3349 	    }
3350 	default:
3351 	  break;
3352 	}
3353 
3354       switch (r_type)
3355 	{
3356 	case R_CRIS_32_GD:
3357 	case R_CRIS_16_GOT_GD:
3358 	case R_CRIS_32_GOT_GD:
3359 	  /* These are requests for tls_index entries, run-time R_CRIS_DTP.  */
3360 	  got_element_size = 8;
3361 	  r_symndx_lgot = LGOT_DTP_NDX (r_symndx);
3362 	  break;
3363 
3364 	case R_CRIS_16_DTPREL:
3365 	case R_CRIS_32_DTPREL:
3366 	  /* These two just request for the constant-index
3367 	     module-local tls_index-sized GOT entry, which we add
3368 	     elsewhere.  */
3369 	  break;
3370 
3371 	case R_CRIS_32_IE:
3372 	case R_CRIS_32_GOT_TPREL:
3373 	case R_CRIS_16_GOT_TPREL:
3374 	  r_symndx_lgot = LGOT_TPREL_NDX (r_symndx);
3375 
3376 	  /* Those relocs also require that a DSO is of type
3377 	     Initial Exec.  Like other targets, we don't reset this
3378 	     flag even if the relocs are GC:ed away.  */
3379 	  if (bfd_link_pic (info))
3380 	    info->flags |= DF_STATIC_TLS;
3381 	  break;
3382 
3383 	  /* Let's list the other assembler-generated TLS-relocs too,
3384 	     just to show that they're not forgotten. */
3385 	case R_CRIS_16_TPREL:
3386 	case R_CRIS_32_TPREL:
3387 	default:
3388 	  break;
3389 	}
3390 
3391       switch (r_type)
3392         {
3393 	case R_CRIS_16_GOTPLT:
3394 	case R_CRIS_32_GOTPLT:
3395 	  /* Mark that we need a GOT entry if the PLT entry (and its GOT
3396 	     entry) is eliminated.  We can only do this for a non-local
3397 	     symbol.  */
3398 	  if (h != NULL)
3399 	    {
3400 	      elf_cris_hash_entry (h)->gotplt_refcount++;
3401 	      goto handle_gotplt_reloc;
3402 	    }
3403 	  /* If h is NULL then this is a local symbol, and we must make a
3404 	     GOT entry for it, so handle it like a GOT reloc.  */
3405 	  /* Fall through.  */
3406 
3407 	case R_CRIS_32_IE:
3408 	case R_CRIS_32_GD:
3409 	case R_CRIS_16_GOT_GD:
3410 	case R_CRIS_32_GOT_GD:
3411 	case R_CRIS_32_GOT_TPREL:
3412 	case R_CRIS_16_GOT_TPREL:
3413 	case R_CRIS_16_GOT:
3414 	case R_CRIS_32_GOT:
3415 	  /* This symbol requires a global offset table entry.  */
3416 	  if (h != NULL)
3417 	    {
3418 	      if (h->got.refcount == 0)
3419 		{
3420 		  /* Make sure this symbol is output as a dynamic symbol.  */
3421 		  if (h->dynindx == -1)
3422 		    {
3423 		      if (!bfd_elf_link_record_dynamic_symbol (info, h))
3424 			return FALSE;
3425 		    }
3426 		}
3427 
3428 	      /* Update the sum of reloc counts for this symbol.  */
3429 	      h->got.refcount++;
3430 
3431 	      switch (r_type)
3432 		{
3433 		case R_CRIS_16_GOT:
3434 		case R_CRIS_32_GOT:
3435 		  if (elf_cris_hash_entry (h)->reg_got_refcount == 0)
3436 		    {
3437 		      /* Allocate space in the .got section.  */
3438 		      sgot->size += got_element_size;
3439 		      /* Allocate relocation space.  */
3440 		      srelgot->size += sizeof (Elf32_External_Rela);
3441 		    }
3442 		  elf_cris_hash_entry (h)->reg_got_refcount++;
3443 		  break;
3444 
3445 		case R_CRIS_32_GD:
3446 		case R_CRIS_16_GOT_GD:
3447 		case R_CRIS_32_GOT_GD:
3448 		  if (elf_cris_hash_entry (h)->dtp_refcount == 0)
3449 		    {
3450 		      /* Allocate space in the .got section.  */
3451 		      sgot->size += got_element_size;
3452 		      /* Allocate relocation space.  */
3453 		      srelgot->size += sizeof (Elf32_External_Rela);
3454 		    }
3455 		  elf_cris_hash_entry (h)->dtp_refcount++;
3456 		  break;
3457 
3458 		case R_CRIS_32_IE:
3459 		case R_CRIS_32_GOT_TPREL:
3460 		case R_CRIS_16_GOT_TPREL:
3461 		  if (elf_cris_hash_entry (h)->tprel_refcount == 0)
3462 		    {
3463 		      /* Allocate space in the .got section.  */
3464 		      sgot->size += got_element_size;
3465 		      /* Allocate relocation space.  */
3466 		      srelgot->size += sizeof (Elf32_External_Rela);
3467 		    }
3468 		  elf_cris_hash_entry (h)->tprel_refcount++;
3469 		  break;
3470 
3471 		default:
3472 		  BFD_FAIL ();
3473 		  break;
3474 		}
3475 	    }
3476 	  else
3477 	    {
3478 	      /* This is a global offset table entry for a local symbol.  */
3479 	      if (local_got_refcounts[r_symndx_lgot] == 0)
3480 		{
3481 		  sgot->size += got_element_size;
3482 		  if (bfd_link_pic (info))
3483 		    {
3484 		      /* If we are generating a shared object, we need
3485 			 to output a R_CRIS_RELATIVE reloc so that the
3486 			 dynamic linker can adjust this GOT entry.
3487 			 Similarly for non-regular got entries.  */
3488 		      srelgot->size += sizeof (Elf32_External_Rela);
3489 		    }
3490 		}
3491 	      /* Update the reloc-specific count.  */
3492 	      local_got_refcounts[r_symndx_lgot]++;
3493 
3494 	      /* This one is the sum of all the others.  */
3495 	      local_got_refcounts[r_symndx]++;
3496 	    }
3497 	  break;
3498 
3499 	case R_CRIS_16_DTPREL:
3500 	case R_CRIS_32_DTPREL:
3501 	case R_CRIS_32_GOTREL:
3502 	  /* This reference requires a global offset table.
3503 	     FIXME: The actual refcount isn't used currently; the .got
3504 	     section can't be removed if there were any references in the
3505 	     input.  */
3506 	  local_got_refcounts[-1]++;
3507 	  break;
3508 
3509 	handle_gotplt_reloc:
3510 
3511 	case R_CRIS_32_PLT_GOTREL:
3512 	  /* This reference requires a global offset table.  */
3513 	  local_got_refcounts[-1]++;
3514 	  /* Fall through.  */
3515 
3516 	case R_CRIS_32_PLT_PCREL:
3517 	  /* This symbol requires a procedure linkage table entry.  We
3518 	     actually build the entry in adjust_dynamic_symbol,
3519              because this might be a case of linking PIC code which is
3520              never referenced by a dynamic object, in which case we
3521              don't need to generate a procedure linkage table entry
3522              after all.  */
3523 
3524 	  /* Beware: if we'd check for visibility of the symbol here
3525 	     (and not marking the need for a PLT when non-visible), we'd
3526 	     get into trouble with keeping handling consistent with
3527 	     regards to relocs found before definition and GOTPLT
3528 	     handling.  Eliminable PLT entries will be dealt with later
3529 	     anyway.  */
3530 	  if (h == NULL)
3531 	    continue;
3532 
3533 	  h->needs_plt = 1;
3534 	  h->plt.refcount++;
3535 	  break;
3536 
3537 	case R_CRIS_8:
3538 	case R_CRIS_16:
3539 	case R_CRIS_32:
3540 	  /* Let's help debug shared library creation.  Any of these
3541 	     relocs *can* be used in shared libs, but pages containing
3542 	     them cannot be shared, so they're not appropriate for
3543 	     common use.  Don't warn for sections we don't care about,
3544 	     such as debug sections or non-constant sections.  We
3545 	     can't help tables of (global) function pointers, for
3546 	     example, though they must be emitted in a (writable) data
3547 	     section to avoid having impure text sections.  */
3548 	  if (bfd_link_pic (info)
3549 	      && (sec->flags & SEC_ALLOC) != 0
3550 	      && (sec->flags & SEC_READONLY) != 0)
3551 	    {
3552 	      /* FIXME: How do we make this optionally a warning only?  */
3553 	      (*_bfd_error_handler)
3554 		(_("%B, section %A:\n  relocation %s should not"
3555 		   " be used in a shared object; recompile with -fPIC"),
3556 		 abfd,
3557 		 sec,
3558 		 cris_elf_howto_table[r_type].name);
3559 	    }
3560 
3561 	  /* We don't need to handle relocs into sections not going into
3562 	     the "real" output.  */
3563 	  if ((sec->flags & SEC_ALLOC) == 0)
3564 	    break;
3565 
3566 	  if (h != NULL)
3567 	    {
3568 	      h->non_got_ref = 1;
3569 
3570 	      /* Make sure a plt entry is created for this symbol if it
3571 		 turns out to be a function defined by a dynamic object.  */
3572 	      if (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
3573 		h->plt.refcount++;
3574 	    }
3575 
3576 	  /* If we are creating a shared library and this is not a local
3577 	     symbol, we need to copy the reloc into the shared library.
3578 	     However when linking with -Bsymbolic and this is a global
3579 	     symbol which is defined in an object we are including in the
3580 	     link (i.e., DEF_REGULAR is set), then we can resolve the
3581 	     reloc directly.  At this point we have not seen all the input
3582 	     files, so it is possible that DEF_REGULAR is not set now but
3583 	     will be set later (it is never cleared).  In case of a weak
3584 	     definition, DEF_REGULAR may be cleared later by a strong
3585 	     definition in a shared library.  We account for that
3586 	     possibility below by storing information in the relocs_copied
3587 	     field of the hash table entry.  A similar situation occurs
3588 	     when creating shared libraries and symbol visibility changes
3589 	     render the symbol local.  */
3590 
3591 	  /* No need to do anything if we're not creating a shared object.  */
3592 	  if (! bfd_link_pic (info))
3593 	    break;
3594 
3595 	  /* We may need to create a reloc section in the dynobj and made room
3596 	     for this reloc.  */
3597 	  if (sreloc == NULL)
3598 	    {
3599 	      sreloc = _bfd_elf_make_dynamic_reloc_section
3600 		(sec, dynobj, 2, abfd, /*rela?*/ TRUE);
3601 
3602 	      if (sreloc == NULL)
3603 		return FALSE;
3604 	    }
3605 
3606 	  if (sec->flags & SEC_READONLY)
3607 	    info->flags |= DF_TEXTREL;
3608 
3609 	  sreloc->size += sizeof (Elf32_External_Rela);
3610 	  break;
3611 
3612 	case R_CRIS_8_PCREL:
3613 	case R_CRIS_16_PCREL:
3614 	case R_CRIS_32_PCREL:
3615 	  if (h != NULL)
3616 	    {
3617 	      h->non_got_ref = 1;
3618 
3619 	      /* Make sure a plt entry is created for this symbol if it
3620 		 turns out to be a function defined by a dynamic object.  */
3621 	      if (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
3622 		h->plt.refcount++;
3623 	    }
3624 
3625 	  /* If we are creating a shared library and this is not a local
3626 	     symbol, we need to copy the reloc into the shared library.
3627 	     However when linking with -Bsymbolic and this is a global
3628 	     symbol which is defined in an object we are including in the
3629 	     link (i.e., DEF_REGULAR is set), then we can resolve the
3630 	     reloc directly.  At this point we have not seen all the input
3631 	     files, so it is possible that DEF_REGULAR is not set now but
3632 	     will be set later (it is never cleared).  In case of a weak
3633 	     definition, DEF_REGULAR may be cleared later by a strong
3634 	     definition in a shared library.  We account for that
3635 	     possibility below by storing information in the relocs_copied
3636 	     field of the hash table entry.  A similar situation occurs
3637 	     when creating shared libraries and symbol visibility changes
3638 	     render the symbol local.  */
3639 
3640 	  /* No need to do anything if we're not creating a shared object.  */
3641 	  if (! bfd_link_pic (info))
3642 	    break;
3643 
3644 	  /* We don't need to handle relocs into sections not going into
3645 	     the "real" output.  */
3646 	  if ((sec->flags & SEC_ALLOC) == 0)
3647 	    break;
3648 
3649 	  /* If the symbol is local, then we know already we can
3650 	     eliminate the reloc.  */
3651 	  if (h == NULL || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
3652 	    break;
3653 
3654 	  /* If this is with -Bsymbolic and the symbol isn't weak, and
3655 	     is defined by an ordinary object (the ones we include in
3656 	     this shared library) then we can also eliminate the
3657 	     reloc.  See comment above for more eliminable cases which
3658 	     we can't identify at this time.  */
3659 	  if (SYMBOLIC_BIND (info, h)
3660 	      && h->root.type != bfd_link_hash_defweak
3661 	      && h->def_regular)
3662 	    break;
3663 
3664 	  /* We may need to create a reloc section in the dynobj and made room
3665 	     for this reloc.  */
3666 	  if (sreloc == NULL)
3667 	    {
3668 	      sreloc = _bfd_elf_make_dynamic_reloc_section
3669 		(sec, dynobj, 2, abfd, /*rela?*/ TRUE);
3670 
3671 	      if (sreloc == NULL)
3672 		return FALSE;
3673 	    }
3674 
3675 	  sreloc->size += sizeof (Elf32_External_Rela);
3676 
3677 	  /* We count the number of PC relative relocations we have
3678 	     entered for this symbol, so that we can discard them
3679 	     again if the symbol is later defined by a regular object.
3680 	     We know that h is really a pointer to an
3681 	     elf_cris_link_hash_entry.  */
3682 	  {
3683 	    struct elf_cris_link_hash_entry *eh;
3684 	    struct elf_cris_pcrel_relocs_copied *p;
3685 
3686 	    eh = elf_cris_hash_entry (h);
3687 
3688 	    for (p = eh->pcrel_relocs_copied; p != NULL; p = p->next)
3689 	      if (p->section == sec)
3690 		break;
3691 
3692 	    if (p == NULL)
3693 	      {
3694 		p = ((struct elf_cris_pcrel_relocs_copied *)
3695 		     bfd_alloc (dynobj, (bfd_size_type) sizeof *p));
3696 		if (p == NULL)
3697 		  return FALSE;
3698 		p->next = eh->pcrel_relocs_copied;
3699 		eh->pcrel_relocs_copied = p;
3700 		p->section = sec;
3701 		p->count = 0;
3702 		p->r_type = r_type;
3703 	      }
3704 
3705 	    ++p->count;
3706 	  }
3707 	  break;
3708 
3709         /* This relocation describes the C++ object vtable hierarchy.
3710            Reconstruct it for later use during GC.  */
3711         case R_CRIS_GNU_VTINHERIT:
3712           if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
3713             return FALSE;
3714           break;
3715 
3716         /* This relocation describes which C++ vtable entries are actually
3717            used.  Record for later use during GC.  */
3718         case R_CRIS_GNU_VTENTRY:
3719           BFD_ASSERT (h != NULL);
3720           if (h != NULL
3721               && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
3722             return FALSE;
3723           break;
3724 
3725 	case R_CRIS_16_TPREL:
3726 	case R_CRIS_32_TPREL:
3727 	  /* Already warned above, when necessary.  */
3728 	  break;
3729 
3730 	default:
3731 	  /* Other relocs do not appear here.  */
3732 	  bfd_set_error (bfd_error_bad_value);
3733 	  return FALSE;
3734         }
3735     }
3736 
3737   return TRUE;
3738 }
3739 
3740 /* Set the sizes of the dynamic sections.  */
3741 
3742 static bfd_boolean
elf_cris_size_dynamic_sections(bfd * output_bfd ATTRIBUTE_UNUSED,struct bfd_link_info * info)3743 elf_cris_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
3744 				struct bfd_link_info *info)
3745 {
3746   struct elf_cris_link_hash_table * htab;
3747   bfd *dynobj;
3748   asection *s;
3749   bfd_boolean plt;
3750   bfd_boolean relocs;
3751 
3752   htab = elf_cris_hash_table (info);
3753   if (htab == NULL)
3754     return FALSE;
3755 
3756   dynobj = elf_hash_table (info)->dynobj;
3757   BFD_ASSERT (dynobj != NULL);
3758 
3759   if (elf_hash_table (info)->dynamic_sections_created)
3760     {
3761       /* Set the contents of the .interp section to the interpreter.  */
3762       if (bfd_link_executable (info) && !info->nointerp)
3763 	{
3764 	  s = bfd_get_linker_section (dynobj, ".interp");
3765 	  BFD_ASSERT (s != NULL);
3766 	  s->size = sizeof ELF_DYNAMIC_INTERPRETER;
3767 	  s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
3768 	}
3769     }
3770   else
3771     {
3772       /* Adjust all expected GOTPLT uses to use a GOT entry instead.  */
3773       elf_cris_link_hash_traverse (htab, elf_cris_adjust_gotplt_to_got,
3774 				   info);
3775 
3776       /* We may have created entries in the .rela.got section.
3777 	 However, if we are not creating the dynamic sections, we will
3778 	 not actually use these entries.  Reset the size of .rela.got,
3779 	 which will cause it to get stripped from the output file
3780 	 below.  */
3781       s = bfd_get_linker_section (dynobj, ".rela.got");
3782       if (s != NULL)
3783 	s->size = 0;
3784     }
3785 
3786   /* If this is a -Bsymbolic shared link, then we need to discard all PC
3787      relative relocs against symbols defined in a regular object.  We
3788      allocated space for them in the check_relocs routine, but we will not
3789      fill them in in the relocate_section routine.  We also discard space
3790      for relocs that have become for local symbols due to symbol
3791      visibility changes.  For programs, we discard space for relocs for
3792      symbols not referenced by any dynamic object.  */
3793   if (bfd_link_pic (info))
3794     elf_cris_link_hash_traverse (htab,
3795 				 elf_cris_discard_excess_dso_dynamics,
3796 				 info);
3797   else
3798     elf_cris_link_hash_traverse (htab,
3799 				 elf_cris_discard_excess_program_dynamics,
3800 				 info);
3801 
3802   /* The check_relocs and adjust_dynamic_symbol entry points have
3803      determined the sizes of the various dynamic sections.  Allocate
3804      memory for them.  */
3805   plt = FALSE;
3806   relocs = FALSE;
3807   for (s = dynobj->sections; s != NULL; s = s->next)
3808     {
3809       const char *name;
3810 
3811       if ((s->flags & SEC_LINKER_CREATED) == 0)
3812 	continue;
3813 
3814       /* It's OK to base decisions on the section name, because none
3815 	 of the dynobj section names depend upon the input files.  */
3816       name = bfd_get_section_name (dynobj, s);
3817 
3818       if (strcmp (name, ".plt") == 0)
3819 	{
3820 	  /* Remember whether there is a PLT.  */
3821 	  plt = s->size != 0;
3822 	}
3823       else if (strcmp (name, ".got.plt") == 0)
3824 	{
3825 	  /* The .got.plt contains the .got header as well as the
3826 	     actual .got.plt contents.  The .got header may contain a
3827 	     R_CRIS_DTPMOD entry at index 3.  */
3828 	  s->size += htab->dtpmod_refcount != 0
3829 	    ? 8 : 0;
3830 	}
3831       else if (CONST_STRNEQ (name, ".rela"))
3832 	{
3833 	  if (strcmp (name, ".rela.got") == 0
3834 	      && htab->dtpmod_refcount != 0
3835 	      && bfd_link_pic (info))
3836 	    s->size += sizeof (Elf32_External_Rela);
3837 
3838 	  if (s->size != 0)
3839 	    {
3840 	      /* Remember whether there are any reloc sections other
3841                  than .rela.plt.  */
3842 	      if (strcmp (name, ".rela.plt") != 0)
3843 		  relocs = TRUE;
3844 
3845 	      /* We use the reloc_count field as a counter if we need
3846 		 to copy relocs into the output file.  */
3847 	      s->reloc_count = 0;
3848 	    }
3849 	}
3850       else if (! CONST_STRNEQ (name, ".got")
3851 	       && strcmp (name, ".dynbss") != 0)
3852 	{
3853 	  /* It's not one of our sections, so don't allocate space.  */
3854 	  continue;
3855 	}
3856 
3857       if (s->size == 0)
3858 	{
3859 	  /* If we don't need this section, strip it from the
3860 	     output file.  This is mostly to handle .rela.bss and
3861 	     .rela.plt.  We must create both sections in
3862 	     create_dynamic_sections, because they must be created
3863 	     before the linker maps input sections to output
3864 	     sections.  The linker does that before
3865 	     adjust_dynamic_symbol is called, and it is that
3866 	     function which decides whether anything needs to go
3867 	     into these sections.  */
3868 	  s->flags |= SEC_EXCLUDE;
3869 	  continue;
3870 	}
3871 
3872       if ((s->flags & SEC_HAS_CONTENTS) == 0)
3873 	continue;
3874 
3875       /* Allocate memory for the section contents. We use bfd_zalloc here
3876 	 in case unused entries are not reclaimed before the section's
3877 	 contents are written out.  This should not happen, but this way
3878 	 if it does, we will not write out garbage.  For reloc sections,
3879 	 this will make entries have the type R_CRIS_NONE.  */
3880       s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
3881       if (s->contents == NULL)
3882 	return FALSE;
3883     }
3884 
3885   if (elf_hash_table (info)->dynamic_sections_created)
3886     {
3887       /* Add some entries to the .dynamic section.  We fill in the
3888 	 values later, in elf_cris_finish_dynamic_sections, but we
3889 	 must add the entries now so that we get the correct size for
3890 	 the .dynamic section.  The DT_DEBUG entry is filled in by the
3891 	 dynamic linker and used by the debugger.  */
3892 #define add_dynamic_entry(TAG, VAL) \
3893   _bfd_elf_add_dynamic_entry (info, TAG, VAL)
3894 
3895       if (!bfd_link_pic (info))
3896 	{
3897 	  if (!add_dynamic_entry (DT_DEBUG, 0))
3898 	    return FALSE;
3899 	}
3900 
3901       if (plt)
3902 	{
3903 	  if (!add_dynamic_entry (DT_PLTGOT, 0)
3904 	      || !add_dynamic_entry (DT_PLTRELSZ, 0)
3905 	      || !add_dynamic_entry (DT_PLTREL, DT_RELA)
3906 	      || !add_dynamic_entry (DT_JMPREL, 0))
3907 	    return FALSE;
3908 	}
3909 
3910       if (relocs)
3911 	{
3912 	  if (!add_dynamic_entry (DT_RELA, 0)
3913 	      || !add_dynamic_entry (DT_RELASZ, 0)
3914 	      || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
3915 	    return FALSE;
3916 	}
3917 
3918       if ((info->flags & DF_TEXTREL) != 0)
3919 	{
3920 	  if (!add_dynamic_entry (DT_TEXTREL, 0))
3921 	    return FALSE;
3922 	  info->flags |= DF_TEXTREL;
3923 	}
3924     }
3925 #undef add_dynamic_entry
3926 
3927   return TRUE;
3928 }
3929 
3930 /* This function is called via elf_cris_link_hash_traverse if we are
3931    creating a shared object.  In the -Bsymbolic case, it discards the
3932    space allocated to copy PC relative relocs against symbols which
3933    are defined in regular objects.  For the normal non-symbolic case,
3934    we also discard space for relocs that have become local due to
3935    symbol visibility changes.  We allocated space for them in the
3936    check_relocs routine, but we won't fill them in in the
3937    relocate_section routine.  */
3938 
3939 static bfd_boolean
elf_cris_discard_excess_dso_dynamics(struct elf_cris_link_hash_entry * h,void * inf)3940 elf_cris_discard_excess_dso_dynamics (struct elf_cris_link_hash_entry *h,
3941 				      void * inf)
3942 {
3943   struct elf_cris_pcrel_relocs_copied *s;
3944   struct bfd_link_info *info = (struct bfd_link_info *) inf;
3945 
3946   /* If a symbol has been forced local or we have found a regular
3947      definition for the symbolic link case, then we won't be needing
3948      any relocs.  */
3949   if (h->root.def_regular
3950       && (h->root.forced_local
3951 	  || SYMBOLIC_BIND (info, &h->root)))
3952     {
3953       for (s = h->pcrel_relocs_copied; s != NULL; s = s->next)
3954 	{
3955 	  asection *sreloc
3956 	    = _bfd_elf_get_dynamic_reloc_section (elf_hash_table (info)
3957 						  ->dynobj,
3958 						  s->section,
3959 						  /*rela?*/ TRUE);
3960 	  sreloc->size -= s->count * sizeof (Elf32_External_Rela);
3961 	}
3962       return TRUE;
3963     }
3964 
3965   /* If we have accounted for PC-relative relocs for read-only
3966      sections, now is the time to warn for them.  We can't do it in
3967      cris_elf_check_relocs, because we don't know the status of all
3968      symbols at that time (and it's common to force symbols local
3969      late).  */
3970 
3971   for (s = h->pcrel_relocs_copied; s != NULL; s = s->next)
3972     if ((s->section->flags & SEC_READONLY) != 0)
3973       {
3974 	/* FIXME: How do we make this optionally a warning only?  */
3975 	(*_bfd_error_handler)
3976 	  (_("%B, section `%A', to symbol `%s':\n"
3977 	     "  relocation %s should not be used"
3978 	     " in a shared object; recompile with -fPIC"),
3979 	   s->section->owner,
3980 	   s->section,
3981 	   h->root.root.root.string,
3982 	   cris_elf_howto_table[s->r_type].name);
3983 
3984 	info->flags |= DF_TEXTREL;
3985       }
3986 
3987   return TRUE;
3988 }
3989 
3990 /* This function is called via elf_cris_link_hash_traverse if we are *not*
3991    creating a shared object.  We discard space for relocs for symbols put
3992    in the .got, but which we found we do not have to resolve at run-time.  */
3993 
3994 static bfd_boolean
elf_cris_discard_excess_program_dynamics(struct elf_cris_link_hash_entry * h,void * inf)3995 elf_cris_discard_excess_program_dynamics (struct elf_cris_link_hash_entry *h,
3996 					  void * inf)
3997 {
3998   struct bfd_link_info *info = (struct bfd_link_info *) inf;
3999 
4000   /* If we're not creating a shared library and have a symbol which is
4001      referred to by .got references, but the symbol is defined locally,
4002      (or rather, not defined by a DSO) then lose the reloc for the .got
4003      (don't allocate room for it).  Likewise for relocs for something
4004      for which we create a PLT.  */
4005   if (!h->root.def_dynamic
4006       || h->root.plt.refcount > 0)
4007     {
4008       if (h->reg_got_refcount > 0
4009 	  /* The size of this section is only valid and in sync with the
4010 	     various reference counts if we do dynamic; don't decrement it
4011 	     otherwise.  */
4012 	  && elf_hash_table (info)->dynamic_sections_created)
4013 	{
4014 	  bfd *dynobj = elf_hash_table (info)->dynobj;
4015 	  asection *srelgot;
4016 
4017 	  BFD_ASSERT (dynobj != NULL);
4018 
4019 	  srelgot = bfd_get_linker_section (dynobj, ".rela.got");
4020 
4021 	  BFD_ASSERT (srelgot != NULL);
4022 
4023 	  srelgot->size -= sizeof (Elf32_External_Rela);
4024 	}
4025 
4026       /* If the locally-defined symbol isn't used by a DSO, then we don't
4027 	 have to export it as a dynamic symbol.  This was already done for
4028 	 functions; doing this for all symbols would presumably not
4029 	 introduce new problems.  Of course we don't do this if we're
4030 	 exporting all dynamic symbols, or all data symbols, regardless of
4031 	 them being referenced or not.  */
4032       if (! (info->export_dynamic
4033 	     || (h->root.type != STT_FUNC && info->dynamic_data))
4034 	  && h->root.dynindx != -1
4035 	  && !h->root.def_dynamic
4036 	  && !h->root.ref_dynamic)
4037 	{
4038 	  h->root.dynindx = -1;
4039 	  _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
4040 				  h->root.dynstr_index);
4041 	}
4042     }
4043 
4044   return TRUE;
4045 }
4046 
4047 /* Reject a file depending on presence and expectation of prefixed
4048    underscores on symbols.  */
4049 
4050 static bfd_boolean
cris_elf_object_p(bfd * abfd)4051 cris_elf_object_p (bfd *abfd)
4052 {
4053   if (! cris_elf_set_mach_from_flags (abfd, elf_elfheader (abfd)->e_flags))
4054     return FALSE;
4055 
4056   if ((elf_elfheader (abfd)->e_flags & EF_CRIS_UNDERSCORE))
4057     return (bfd_get_symbol_leading_char (abfd) == '_');
4058   else
4059     return (bfd_get_symbol_leading_char (abfd) == 0);
4060 }
4061 
4062 /* Mark presence or absence of leading underscore.  Set machine type
4063    flags from mach type.  */
4064 
4065 static void
cris_elf_final_write_processing(bfd * abfd,bfd_boolean linker ATTRIBUTE_UNUSED)4066 cris_elf_final_write_processing (bfd *abfd,
4067 				 bfd_boolean linker ATTRIBUTE_UNUSED)
4068 {
4069   unsigned long e_flags = elf_elfheader (abfd)->e_flags;
4070 
4071   e_flags &= ~EF_CRIS_UNDERSCORE;
4072   if (bfd_get_symbol_leading_char (abfd) == '_')
4073     e_flags |= EF_CRIS_UNDERSCORE;
4074 
4075   switch (bfd_get_mach (abfd))
4076     {
4077     case bfd_mach_cris_v0_v10:
4078       e_flags |= EF_CRIS_VARIANT_ANY_V0_V10;
4079       break;
4080 
4081     case bfd_mach_cris_v10_v32:
4082       e_flags |= EF_CRIS_VARIANT_COMMON_V10_V32;
4083       break;
4084 
4085     case bfd_mach_cris_v32:
4086       e_flags |= EF_CRIS_VARIANT_V32;
4087       break;
4088 
4089     default:
4090       _bfd_abort (__FILE__, __LINE__,
4091 		  _("Unexpected machine number"));
4092     }
4093 
4094   elf_elfheader (abfd)->e_flags = e_flags;
4095 }
4096 
4097 /* Set the mach type from e_flags value.  */
4098 
4099 static bfd_boolean
cris_elf_set_mach_from_flags(bfd * abfd,unsigned long flags)4100 cris_elf_set_mach_from_flags (bfd *abfd,
4101 			      unsigned long flags)
4102 {
4103   switch (flags & EF_CRIS_VARIANT_MASK)
4104     {
4105     case EF_CRIS_VARIANT_ANY_V0_V10:
4106       bfd_default_set_arch_mach (abfd, bfd_arch_cris, bfd_mach_cris_v0_v10);
4107       break;
4108 
4109     case EF_CRIS_VARIANT_V32:
4110       bfd_default_set_arch_mach (abfd, bfd_arch_cris, bfd_mach_cris_v32);
4111       break;
4112 
4113     case EF_CRIS_VARIANT_COMMON_V10_V32:
4114       bfd_default_set_arch_mach (abfd, bfd_arch_cris, bfd_mach_cris_v10_v32);
4115       break;
4116 
4117     default:
4118       /* Since we don't recognize them, we obviously can't support them
4119 	 with this code; we'd have to require that all future handling
4120 	 would be optional.  */
4121       bfd_set_error (bfd_error_wrong_format);
4122       return FALSE;
4123     }
4124 
4125   return TRUE;
4126 }
4127 
4128 /* Display the flags field.  */
4129 
4130 static bfd_boolean
cris_elf_print_private_bfd_data(bfd * abfd,void * ptr)4131 cris_elf_print_private_bfd_data (bfd *abfd, void * ptr)
4132 {
4133   FILE *file = (FILE *) ptr;
4134 
4135   BFD_ASSERT (abfd != NULL && ptr != NULL);
4136 
4137   _bfd_elf_print_private_bfd_data (abfd, ptr);
4138 
4139   fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
4140 
4141   if (elf_elfheader (abfd)->e_flags & EF_CRIS_UNDERSCORE)
4142     fprintf (file, _(" [symbols have a _ prefix]"));
4143   if ((elf_elfheader (abfd)->e_flags & EF_CRIS_VARIANT_MASK)
4144       == EF_CRIS_VARIANT_COMMON_V10_V32)
4145     fprintf (file, _(" [v10 and v32]"));
4146   if ((elf_elfheader (abfd)->e_flags & EF_CRIS_VARIANT_MASK)
4147       == EF_CRIS_VARIANT_V32)
4148     fprintf (file, _(" [v32]"));
4149 
4150   fputc ('\n', file);
4151   return TRUE;
4152 }
4153 
4154 /* Don't mix files with and without a leading underscore.  */
4155 
4156 static bfd_boolean
cris_elf_merge_private_bfd_data(bfd * ibfd,bfd * obfd)4157 cris_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
4158 {
4159   int imach, omach;
4160 
4161   if (! _bfd_generic_verify_endian_match (ibfd, obfd))
4162     return FALSE;
4163 
4164   if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
4165       || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
4166     return TRUE;
4167 
4168   imach = bfd_get_mach (ibfd);
4169 
4170   if (! elf_flags_init (obfd))
4171     {
4172       /* This happens when ld starts out with a 'blank' output file.  */
4173       elf_flags_init (obfd) = TRUE;
4174 
4175       /* We ignore the linker-set mach, and instead set it according to
4176 	 the first input file.  This would also happen if we could
4177 	 somehow filter out the OUTPUT_ARCH () setting from elf.sc.
4178 	 This allows us to keep the same linker config across
4179 	 cris(v0..v10) and crisv32.  The drawback is that we can't force
4180 	 the output type, which might be a sane thing to do for a
4181 	 v10+v32 compatibility object.  */
4182       if (! bfd_set_arch_mach (obfd, bfd_arch_cris, imach))
4183 	return FALSE;
4184     }
4185 
4186   if (bfd_get_symbol_leading_char (ibfd)
4187       != bfd_get_symbol_leading_char (obfd))
4188     {
4189       (*_bfd_error_handler)
4190 	(bfd_get_symbol_leading_char (ibfd) == '_'
4191 	 ? _("%B: uses _-prefixed symbols, but writing file with non-prefixed symbols")
4192 	 : _("%B: uses non-prefixed symbols, but writing file with _-prefixed symbols"),
4193 	 ibfd);
4194       bfd_set_error (bfd_error_bad_value);
4195       return FALSE;
4196     }
4197 
4198   omach = bfd_get_mach (obfd);
4199 
4200   if (imach != omach)
4201     {
4202       /* We can get an incompatible combination only if either is
4203 	 bfd_mach_cris_v32, and the other one isn't compatible.  */
4204       if ((imach == bfd_mach_cris_v32
4205 	   && omach != bfd_mach_cris_v10_v32)
4206 	  || (omach == bfd_mach_cris_v32
4207 	      && imach != bfd_mach_cris_v10_v32))
4208 	{
4209 	  (*_bfd_error_handler)
4210 	    ((imach == bfd_mach_cris_v32)
4211 	     ? _("%B contains CRIS v32 code, incompatible"
4212 		 " with previous objects")
4213 	     : _("%B contains non-CRIS-v32 code, incompatible"
4214 		 " with previous objects"),
4215 	     ibfd);
4216 	  bfd_set_error (bfd_error_bad_value);
4217 	  return FALSE;
4218 	}
4219 
4220       /* We don't have to check the case where the input is compatible
4221 	 with v10 and v32, because the output is already known to be set
4222 	 to the other (compatible) mach.  */
4223       if (omach == bfd_mach_cris_v10_v32
4224 	  && ! bfd_set_arch_mach (obfd, bfd_arch_cris, imach))
4225 	return FALSE;
4226     }
4227 
4228   return TRUE;
4229 }
4230 
4231 /* Do side-effects of e_flags copying to obfd.  */
4232 
4233 static bfd_boolean
cris_elf_copy_private_bfd_data(bfd * ibfd,bfd * obfd)4234 cris_elf_copy_private_bfd_data (bfd *ibfd, bfd *obfd)
4235 {
4236   /* Call the base function.  */
4237   if (!_bfd_elf_copy_private_bfd_data (ibfd, obfd))
4238     return FALSE;
4239 
4240   /* If output is big-endian for some obscure reason, stop here.  */
4241   if (_bfd_generic_verify_endian_match (ibfd, obfd) == FALSE)
4242     return FALSE;
4243 
4244   if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
4245       || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
4246     return TRUE;
4247 
4248   /* Do what we really came here for.  */
4249   return bfd_set_arch_mach (obfd, bfd_arch_cris, bfd_get_mach (ibfd));
4250 }
4251 
4252 static enum elf_reloc_type_class
elf_cris_reloc_type_class(const struct bfd_link_info * info ATTRIBUTE_UNUSED,const asection * rel_sec ATTRIBUTE_UNUSED,const Elf_Internal_Rela * rela)4253 elf_cris_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
4254 			   const asection *rel_sec ATTRIBUTE_UNUSED,
4255 			   const Elf_Internal_Rela *rela)
4256 {
4257   enum elf_cris_reloc_type r_type = ELF32_R_TYPE (rela->r_info);
4258   switch (r_type)
4259     {
4260     case R_CRIS_RELATIVE:
4261       return reloc_class_relative;
4262     case R_CRIS_JUMP_SLOT:
4263       return reloc_class_plt;
4264     case R_CRIS_COPY:
4265       return reloc_class_copy;
4266     default:
4267       return reloc_class_normal;
4268     }
4269 }
4270 
4271 /* The elf_backend_got_elt_size worker.  For one symbol, we can have up to
4272    two GOT entries from three types with two different sizes.  We handle
4273    it as a single entry, so we can use the regular offset-calculation
4274    machinery.  */
4275 
4276 static bfd_vma
elf_cris_got_elt_size(bfd * abfd ATTRIBUTE_UNUSED,struct bfd_link_info * info ATTRIBUTE_UNUSED,struct elf_link_hash_entry * hr,bfd * ibfd,unsigned long symndx)4277 elf_cris_got_elt_size (bfd *abfd ATTRIBUTE_UNUSED,
4278 		       struct bfd_link_info *info ATTRIBUTE_UNUSED,
4279 		       struct elf_link_hash_entry *hr,
4280 		       bfd *ibfd,
4281 		       unsigned long symndx)
4282 {
4283   struct elf_link_hash_entry *h = (struct elf_link_hash_entry *) hr;
4284   bfd_vma eltsiz = 0;
4285 
4286   /* We may have one regular GOT entry or up to two TLS GOT
4287      entries.  */
4288   if (h == NULL)
4289     {
4290       Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
4291       bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (ibfd);
4292 
4293       BFD_ASSERT (local_got_refcounts != NULL);
4294 
4295       if (local_got_refcounts[LGOT_REG_NDX (symndx)] > 0)
4296 	{
4297 	  /* We can't have a variable referred to both as a regular
4298 	     variable and through TLS relocs.  */
4299 	  BFD_ASSERT (local_got_refcounts[LGOT_DTP_NDX (symndx)] == 0
4300 		      && local_got_refcounts[LGOT_TPREL_NDX (symndx)] == 0);
4301 	  return 4;
4302 	}
4303 
4304       if (local_got_refcounts[LGOT_DTP_NDX (symndx)] > 0)
4305 	eltsiz += 8;
4306 
4307       if (local_got_refcounts[LGOT_TPREL_NDX (symndx)] > 0)
4308 	eltsiz += 4;
4309     }
4310   else
4311     {
4312       struct elf_cris_link_hash_entry *hh = elf_cris_hash_entry (h);
4313       if (hh->reg_got_refcount > 0)
4314 	{
4315 	  /* The actual error-on-input is emitted elsewhere.  */
4316 	  BFD_ASSERT (hh->dtp_refcount == 0 && hh->tprel_refcount == 0);
4317 	  return 4;
4318 	}
4319 
4320       if (hh->dtp_refcount > 0)
4321 	eltsiz += 8;
4322 
4323       if (hh->tprel_refcount > 0)
4324 	eltsiz += 4;
4325     }
4326 
4327   /* We're only called when h->got.refcount is non-zero, so we must
4328      have a non-zero size.  */
4329   BFD_ASSERT (eltsiz != 0);
4330   return eltsiz;
4331 }
4332 
4333 #define ELF_ARCH		bfd_arch_cris
4334 #define ELF_TARGET_ID		CRIS_ELF_DATA
4335 #define ELF_MACHINE_CODE	EM_CRIS
4336 #define ELF_MAXPAGESIZE		0x2000
4337 
4338 #define TARGET_LITTLE_SYM	cris_elf32_vec
4339 #define TARGET_LITTLE_NAME	"elf32-cris"
4340 #define elf_symbol_leading_char 0
4341 
4342 #define elf_info_to_howto_rel			NULL
4343 #define elf_info_to_howto			cris_info_to_howto_rela
4344 #define elf_backend_relocate_section		cris_elf_relocate_section
4345 #define elf_backend_gc_mark_hook		cris_elf_gc_mark_hook
4346 #define elf_backend_gc_sweep_hook		cris_elf_gc_sweep_hook
4347 #define elf_backend_plt_sym_val			cris_elf_plt_sym_val
4348 #define elf_backend_check_relocs                cris_elf_check_relocs
4349 #define elf_backend_grok_prstatus		cris_elf_grok_prstatus
4350 #define elf_backend_grok_psinfo			cris_elf_grok_psinfo
4351 
4352 #define elf_backend_can_gc_sections		1
4353 #define elf_backend_can_refcount		1
4354 
4355 #define elf_backend_object_p			cris_elf_object_p
4356 #define elf_backend_final_write_processing \
4357 	cris_elf_final_write_processing
4358 #define bfd_elf32_bfd_print_private_bfd_data \
4359 	cris_elf_print_private_bfd_data
4360 #define bfd_elf32_bfd_merge_private_bfd_data \
4361 	cris_elf_merge_private_bfd_data
4362 #define bfd_elf32_bfd_copy_private_bfd_data \
4363 	cris_elf_copy_private_bfd_data
4364 
4365 #define bfd_elf32_bfd_reloc_type_lookup		cris_reloc_type_lookup
4366 #define bfd_elf32_bfd_reloc_name_lookup	cris_reloc_name_lookup
4367 
4368 #define bfd_elf32_bfd_link_hash_table_create \
4369 	elf_cris_link_hash_table_create
4370 #define elf_backend_adjust_dynamic_symbol \
4371 	elf_cris_adjust_dynamic_symbol
4372 #define elf_backend_copy_indirect_symbol \
4373 	elf_cris_copy_indirect_symbol
4374 #define elf_backend_size_dynamic_sections \
4375 	elf_cris_size_dynamic_sections
4376 #define elf_backend_init_index_section		_bfd_elf_init_1_index_section
4377 #define elf_backend_finish_dynamic_symbol \
4378 	elf_cris_finish_dynamic_symbol
4379 #define elf_backend_finish_dynamic_sections \
4380 	elf_cris_finish_dynamic_sections
4381 #define elf_backend_create_dynamic_sections \
4382 	_bfd_elf_create_dynamic_sections
4383 #define bfd_elf32_bfd_final_link \
4384 	bfd_elf_gc_common_final_link
4385 #define elf_backend_hide_symbol			elf_cris_hide_symbol
4386 #define elf_backend_reloc_type_class		elf_cris_reloc_type_class
4387 
4388 #define elf_backend_want_got_plt	1
4389 #define elf_backend_plt_readonly	1
4390 #define elf_backend_want_plt_sym	0
4391 #define elf_backend_got_header_size	12
4392 #define elf_backend_got_elt_size elf_cris_got_elt_size
4393 
4394 /* Later, we my want to optimize RELA entries into REL entries for dynamic
4395    linking and libraries (if it's a win of any significance).  Until then,
4396    take the easy route.  */
4397 #define elf_backend_may_use_rel_p 0
4398 #define elf_backend_may_use_rela_p 1
4399 #define elf_backend_rela_normal		1
4400 
4401 #include "elf32-target.h"
4402 
4403 #undef TARGET_LITTLE_SYM
4404 #undef TARGET_LITTLE_NAME
4405 #undef elf_symbol_leading_char
4406 
4407 #define TARGET_LITTLE_SYM cris_elf32_us_vec
4408 #define TARGET_LITTLE_NAME "elf32-us-cris"
4409 #define elf_symbol_leading_char '_'
4410 #undef elf32_bed
4411 #define elf32_bed elf32_us_cris_bed
4412 
4413 #include "elf32-target.h"
4414