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[/] [open8_urisc/] [trunk/] [gnu/] [binutils/] [bfd/] [elf32-crx.c] - Blame information for rev 279

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1 14 khays 
/* BFD back-end for National Semiconductor's CRX ELF
2 
   Copyright 2004, 2005, 2006, 2007, 2009, 2010
3 
   Free Software Foundation, Inc.
4 
   Written by Tomer Levi, NSC, Israel.
5 
 
6 
   This file is part of BFD, the Binary File Descriptor library.
7 
 
8 
   This program is free software; you can redistribute it and/or modify
9 
   it under the terms of the GNU General Public License as published by
10 
   the Free Software Foundation; either version 3 of the License, or
11 
   (at your option) any later version.
12 
 
13 
   This program is distributed in the hope that it will be useful,
14 
   but WITHOUT ANY WARRANTY; without even the implied warranty of
15 
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16 
   GNU General Public License for more details.
17 
 
18 
   You should have received a copy of the GNU General Public License
19 
   along with this program; if not, write to the Free Software
20 
   Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
21 
   MA 02110-1301, USA.  */
22 
 
23 
#include "sysdep.h"
24 
#include "bfd.h"
25 
#include "bfdlink.h"
26 
#include "libbfd.h"
27 
#include "elf-bfd.h"
28 
#include "elf/crx.h"
29 
 
30 
static reloc_howto_type *elf_crx_reloc_type_lookup
31 
  (bfd *, bfd_reloc_code_real_type);
32 
static void elf_crx_info_to_howto
33 
  (bfd *, arelent *, Elf_Internal_Rela *);
34 
static bfd_boolean elf32_crx_relax_delete_bytes
35 
  (struct bfd_link_info *, bfd *, asection *, bfd_vma, int);
36 
static bfd_reloc_status_type crx_elf_final_link_relocate
37 
  (reloc_howto_type *, bfd *, bfd *, asection *,
38 
   bfd_byte *, bfd_vma, bfd_vma, bfd_vma,
39 
   struct bfd_link_info *, asection *, int);
40 
static bfd_boolean elf32_crx_relocate_section
41 
  (bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
42 
   Elf_Internal_Rela *, Elf_Internal_Sym *, asection **);
43 
static bfd_boolean elf32_crx_relax_section
44 
  (bfd *, asection *, struct bfd_link_info *, bfd_boolean *);
45 
static bfd_byte * elf32_crx_get_relocated_section_contents
46 
  (bfd *, struct bfd_link_info *, struct bfd_link_order *,
47 
   bfd_byte *, bfd_boolean, asymbol **);
48 
 
49 
/* crx_reloc_map array maps BFD relocation enum into a CRGAS relocation type.  */
50 
 
51 
struct crx_reloc_map
52 
{
53 
  bfd_reloc_code_real_type bfd_reloc_enum; /* BFD relocation enum.  */
54 
  unsigned short crx_reloc_type;           /* CRX relocation type.  */
55 
};
56 
 
57 
static const struct crx_reloc_map crx_reloc_map[R_CRX_MAX] =
58 
{
59 
  {BFD_RELOC_NONE,          R_CRX_NONE},
60 
  {BFD_RELOC_CRX_REL4,      R_CRX_REL4},
61 
  {BFD_RELOC_CRX_REL8,      R_CRX_REL8},
62 
  {BFD_RELOC_CRX_REL8_CMP,  R_CRX_REL8_CMP},
63 
  {BFD_RELOC_CRX_REL16,     R_CRX_REL16},
64 
  {BFD_RELOC_CRX_REL24,     R_CRX_REL24},
65 
  {BFD_RELOC_CRX_REL32,     R_CRX_REL32},
66 
  {BFD_RELOC_CRX_REGREL12,  R_CRX_REGREL12},
67 
  {BFD_RELOC_CRX_REGREL22,  R_CRX_REGREL22},
68 
  {BFD_RELOC_CRX_REGREL28,  R_CRX_REGREL28},
69 
  {BFD_RELOC_CRX_REGREL32,  R_CRX_REGREL32},
70 
  {BFD_RELOC_CRX_ABS16,     R_CRX_ABS16},
71 
  {BFD_RELOC_CRX_ABS32,     R_CRX_ABS32},
72 
  {BFD_RELOC_CRX_NUM8,      R_CRX_NUM8},
73 
  {BFD_RELOC_CRX_NUM16,     R_CRX_NUM16},
74 
  {BFD_RELOC_CRX_NUM32,     R_CRX_NUM32},
75 
  {BFD_RELOC_CRX_IMM16,     R_CRX_IMM16},
76 
  {BFD_RELOC_CRX_IMM32,     R_CRX_IMM32},
77 
  {BFD_RELOC_CRX_SWITCH8,   R_CRX_SWITCH8},
78 
  {BFD_RELOC_CRX_SWITCH16,  R_CRX_SWITCH16},
79 
  {BFD_RELOC_CRX_SWITCH32,  R_CRX_SWITCH32}
80 
};
81 
 
82 
static reloc_howto_type crx_elf_howto_table[] =
83 
{
84 
  HOWTO (R_CRX_NONE,            /* type */
85 
         0,                      /* rightshift */
86 
         2,                     /* size */
87 
         32,                    /* bitsize */
88 
         FALSE,                 /* pc_relative */
89 
         0,                      /* bitpos */
90 
         complain_overflow_dont,/* complain_on_overflow */
91 
         bfd_elf_generic_reloc, /* special_function */
92 
         "R_CRX_NONE",          /* name */
93 
         FALSE,                 /* partial_inplace */
94 
         0,                      /* src_mask */
95 
         0,                      /* dst_mask */
96 
         FALSE),                /* pcrel_offset */
97 
 
98 
  HOWTO (R_CRX_REL4,            /* type */
99 
         1,                     /* rightshift */
100 
         0,                      /* size */
101 
         4,                     /* bitsize */
102 
         TRUE,                  /* pc_relative */
103 
         0,                      /* bitpos */
104 
         complain_overflow_bitfield,/* complain_on_overflow */
105 
         bfd_elf_generic_reloc, /* special_function */
106 
         "R_CRX_REL4",          /* name */
107 
         FALSE,                 /* partial_inplace */
108 
         0x0,                   /* src_mask */
109 
         0xf,                   /* dst_mask */
110 
         FALSE),                /* pcrel_offset */
111 
 
112 
  HOWTO (R_CRX_REL8,            /* type */
113 
         1,                     /* rightshift */
114 
         0,                      /* size */
115 
         8,                     /* bitsize */
116 
         TRUE,                  /* pc_relative */
117 
         0,                      /* bitpos */
118 
         complain_overflow_bitfield,/* complain_on_overflow */
119 
         bfd_elf_generic_reloc, /* special_function */
120 
         "R_CRX_REL8",          /* name */
121 
         FALSE,                 /* partial_inplace */
122 
         0x0,                   /* src_mask */
123 
         0xff,                  /* dst_mask */
124 
         FALSE),                /* pcrel_offset */
125 
 
126 
  HOWTO (R_CRX_REL8_CMP,        /* type */
127 
         1,                     /* rightshift */
128 
         0,                      /* size */
129 
         8,                     /* bitsize */
130 
         TRUE,                  /* pc_relative */
131 
         0,                      /* bitpos */
132 
         complain_overflow_bitfield,/* complain_on_overflow */
133 
         bfd_elf_generic_reloc, /* special_function */
134 
         "R_CRX_REL8_CMP",      /* name */
135 
         FALSE,                 /* partial_inplace */
136 
         0x0,                   /* src_mask */
137 
         0xff,                  /* dst_mask */
138 
         FALSE),                /* pcrel_offset */
139 
 
140 
  HOWTO (R_CRX_REL16,           /* type */
141 
         1,                     /* rightshift */
142 
         1,                     /* size */
143 
         16,                    /* bitsize */
144 
         TRUE,                  /* pc_relative */
145 
         0,                      /* bitpos */
146 
         complain_overflow_bitfield,/* complain_on_overflow */
147 
         bfd_elf_generic_reloc, /* special_function */
148 
         "R_CRX_REL16",         /* name */
149 
         FALSE,                 /* partial_inplace */
150 
         0x0,                   /* src_mask */
151 
         0xffff,                /* dst_mask */
152 
         FALSE),                /* pcrel_offset */
153 
 
154 
  HOWTO (R_CRX_REL24,           /* type */
155 
         1,                     /* rightshift */
156 
         2,                     /* size */
157 
         24,                    /* bitsize */
158 
         TRUE,                  /* pc_relative */
159 
         0,                      /* bitpos */
160 
         complain_overflow_bitfield,/* complain_on_overflow */
161 
         bfd_elf_generic_reloc, /* special_function */
162 
         "R_CRX_REL24",         /* name */
163 
         FALSE,                 /* partial_inplace */
164 
         0x0,                   /* src_mask */
165 
         0xffffff,              /* dst_mask */
166 
         FALSE),                /* pcrel_offset */
167 
 
168 
  HOWTO (R_CRX_REL32,           /* type */
169 
         1,                     /* rightshift */
170 
         2,                     /* size */
171 
         32,                    /* bitsize */
172 
         TRUE,                  /* pc_relative */
173 
         0,                      /* bitpos */
174 
         complain_overflow_bitfield,/* complain_on_overflow */
175 
         bfd_elf_generic_reloc, /* special_function */
176 
         "R_CRX_REL32",         /* name */
177 
         FALSE,                 /* partial_inplace */
178 
         0x0,                   /* src_mask */
179 
         0xffffffff,            /* dst_mask */
180 
         FALSE),                /* pcrel_offset */
181 
 
182 
  HOWTO (R_CRX_REGREL12,        /* type */
183 
         0,                      /* rightshift */
184 
         1,                     /* size */
185 
         12,                    /* bitsize */
186 
         FALSE,                 /* pc_relative */
187 
         0,                      /* bitpos */
188 
         complain_overflow_bitfield,/* complain_on_overflow */
189 
         bfd_elf_generic_reloc, /* special_function */
190 
         "R_CRX_REGREL12",      /* name */
191 
         FALSE,                 /* partial_inplace */
192 
         0x0,                   /* src_mask */
193 
         0xfff,                 /* dst_mask */
194 
         FALSE),                /* pcrel_offset */
195 
 
196 
  HOWTO (R_CRX_REGREL22,        /* type */
197 
         0,                      /* rightshift */
198 
         2,                     /* size */
199 
         22,                    /* bitsize */
200 
         FALSE,                 /* pc_relative */
201 
         0,                      /* bitpos */
202 
         complain_overflow_bitfield,/* complain_on_overflow */
203 
         bfd_elf_generic_reloc, /* special_function */
204 
         "R_CRX_REGREL22",      /* name */
205 
         FALSE,                 /* partial_inplace */
206 
         0x0,                   /* src_mask */
207 
         0x3fffff,              /* dst_mask */
208 
         FALSE),                /* pcrel_offset */
209 
 
210 
  HOWTO (R_CRX_REGREL28,        /* type */
211 
         0,                      /* rightshift */
212 
         2,                     /* size */
213 
         28,                    /* bitsize */
214 
         FALSE,                 /* pc_relative */
215 
         0,                      /* bitpos */
216 
         complain_overflow_bitfield,/* complain_on_overflow */
217 
         bfd_elf_generic_reloc, /* special_function */
218 
         "R_CRX_REGREL28",      /* name */
219 
         FALSE,                 /* partial_inplace */
220 
         0x0,                   /* src_mask */
221 
         0xfffffff,             /* dst_mask */
222 
         FALSE),                /* pcrel_offset */
223 
 
224 
  HOWTO (R_CRX_REGREL32,        /* type */
225 
         0,                      /* rightshift */
226 
         2,                     /* size */
227 
         32,                    /* bitsize */
228 
         FALSE,                 /* pc_relative */
229 
         0,                      /* bitpos */
230 
         complain_overflow_bitfield,/* complain_on_overflow */
231 
         bfd_elf_generic_reloc, /* special_function */
232 
         "R_CRX_REGREL32",      /* name */
233 
         FALSE,                 /* partial_inplace */
234 
         0x0,                   /* src_mask */
235 
         0xffffffff,            /* dst_mask */
236 
         FALSE),                /* pcrel_offset */
237 
 
238 
  HOWTO (R_CRX_ABS16,           /* type */
239 
         0,                      /* rightshift */
240 
         1,                     /* size */
241 
         16,                    /* bitsize */
242 
         FALSE,                 /* pc_relative */
243 
         0,                      /* bitpos */
244 
         complain_overflow_bitfield,/* complain_on_overflow */
245 
         bfd_elf_generic_reloc, /* special_function */
246 
         "R_CRX_ABS16",         /* name */
247 
         FALSE,                 /* partial_inplace */
248 
         0x0,                   /* src_mask */
249 
         0xffff,                /* dst_mask */
250 
         FALSE),                /* pcrel_offset */
251 
 
252 
  HOWTO (R_CRX_ABS32,           /* type */
253 
         0,                      /* rightshift */
254 
         2,                     /* size */
255 
         32,                    /* bitsize */
256 
         FALSE,                 /* pc_relative */
257 
         0,                      /* bitpos */
258 
         complain_overflow_bitfield,/* complain_on_overflow */
259 
         bfd_elf_generic_reloc, /* special_function */
260 
         "R_CRX_ABS32",         /* name */
261 
         FALSE,                 /* partial_inplace */
262 
         0x0,                   /* src_mask */
263 
         0xffffffff,            /* dst_mask */
264 
         FALSE),                /* pcrel_offset */
265 
 
266 
  HOWTO (R_CRX_NUM8,            /* type */
267 
         0,                      /* rightshift */
268 
         0,                      /* size */
269 
         8,                     /* bitsize */
270 
         FALSE,                 /* pc_relative */
271 
         0,                      /* bitpos */
272 
         complain_overflow_bitfield,/* complain_on_overflow */
273 
         bfd_elf_generic_reloc, /* special_function */
274 
         "R_CRX_NUM8",          /* name */
275 
         FALSE,                 /* partial_inplace */
276 
         0x0,                   /* src_mask */
277 
         0xff,                  /* dst_mask */
278 
         FALSE),                /* pcrel_offset */
279 
 
280 
  HOWTO (R_CRX_NUM16,           /* type */
281 
         0,                      /* rightshift */
282 
         1,                     /* size */
283 
         16,                    /* bitsize */
284 
         FALSE,                 /* pc_relative */
285 
         0,                      /* bitpos */
286 
         complain_overflow_bitfield,/* complain_on_overflow */
287 
         bfd_elf_generic_reloc, /* special_function */
288 
         "R_CRX_NUM16",         /* name */
289 
         FALSE,                 /* partial_inplace */
290 
         0x0,                   /* src_mask */
291 
         0xffff,                /* dst_mask */
292 
         FALSE),                /* pcrel_offset */
293 
 
294 
  HOWTO (R_CRX_NUM32,           /* type */
295 
         0,                      /* rightshift */
296 
         2,                     /* size */
297 
         32,                    /* bitsize */
298 
         FALSE,                 /* pc_relative */
299 
         0,                      /* bitpos */
300 
         complain_overflow_bitfield,/* complain_on_overflow */
301 
         bfd_elf_generic_reloc, /* special_function */
302 
         "R_CRX_NUM32",         /* name */
303 
         FALSE,                 /* partial_inplace */
304 
         0x0,                   /* src_mask */
305 
         0xffffffff,            /* dst_mask */
306 
         FALSE),                /* pcrel_offset */
307 
 
308 
  HOWTO (R_CRX_IMM16,           /* type */
309 
         0,                      /* rightshift */
310 
         1,                     /* size */
311 
         16,                    /* bitsize */
312 
         FALSE,                 /* pc_relative */
313 
         0,                      /* bitpos */
314 
         complain_overflow_bitfield,/* complain_on_overflow */
315 
         bfd_elf_generic_reloc, /* special_function */
316 
         "R_CRX_IMM16",         /* name */
317 
         FALSE,                 /* partial_inplace */
318 
         0x0,                   /* src_mask */
319 
         0xffff,                /* dst_mask */
320 
         FALSE),                /* pcrel_offset */
321 
 
322 
  HOWTO (R_CRX_IMM32,           /* type */
323 
         0,                      /* rightshift */
324 
         2,                     /* size */
325 
         32,                    /* bitsize */
326 
         FALSE,                 /* pc_relative */
327 
         0,                      /* bitpos */
328 
         complain_overflow_bitfield,/* complain_on_overflow */
329 
         bfd_elf_generic_reloc, /* special_function */
330 
         "R_CRX_IMM32",         /* name */
331 
         FALSE,                 /* partial_inplace */
332 
         0x0,                   /* src_mask */
333 
         0xffffffff,            /* dst_mask */
334 
         FALSE),                /* pcrel_offset */
335 
 
336 
  /* An 8 bit switch table entry.  This is generated for an expression
337 
     such as ``.byte L1 - L2''.  The offset holds the difference
338 
     between the reloc address and L2.  */
339 
  HOWTO (R_CRX_SWITCH8,         /* type */
340 
         0,                      /* rightshift */
341 
         0,                      /* size (0 = byte, 1 = short, 2 = long) */
342 
         8,                     /* bitsize */
343 
         FALSE,                 /* pc_relative */
344 
         0,                      /* bitpos */
345 
         complain_overflow_unsigned, /* complain_on_overflow */
346 
         bfd_elf_generic_reloc, /* special_function */
347 
         "R_CRX_SWITCH8",       /* name */
348 
         FALSE,                 /* partial_inplace */
349 
         0x0,                   /* src_mask */
350 
         0xff,                  /* dst_mask */
351 
         TRUE),                 /* pcrel_offset */
352 
 
353 
  /* A 16 bit switch table entry.  This is generated for an expression
354 
     such as ``.word L1 - L2''.  The offset holds the difference
355 
     between the reloc address and L2.  */
356 
  HOWTO (R_CRX_SWITCH16,        /* type */
357 
         0,                      /* rightshift */
358 
         1,                     /* size (0 = byte, 1 = short, 2 = long) */
359 
         16,                    /* bitsize */
360 
         FALSE,                 /* pc_relative */
361 
         0,                      /* bitpos */
362 
         complain_overflow_unsigned, /* complain_on_overflow */
363 
         bfd_elf_generic_reloc, /* special_function */
364 
         "R_CRX_SWITCH16",      /* name */
365 
         FALSE,                 /* partial_inplace */
366 
         0x0,                   /* src_mask */
367 
         0xffff,                /* dst_mask */
368 
         TRUE),                 /* pcrel_offset */
369 
 
370 
  /* A 32 bit switch table entry.  This is generated for an expression
371 
     such as ``.long L1 - L2''.  The offset holds the difference
372 
     between the reloc address and L2.  */
373 
  HOWTO (R_CRX_SWITCH32,        /* type */
374 
         0,                      /* rightshift */
375 
         2,                     /* size (0 = byte, 1 = short, 2 = long) */
376 
         32,                    /* bitsize */
377 
         FALSE,                 /* pc_relative */
378 
         0,                      /* bitpos */
379 
         complain_overflow_unsigned, /* complain_on_overflow */
380 
         bfd_elf_generic_reloc, /* special_function */
381 
         "R_CRX_SWITCH32",      /* name */
382 
         FALSE,                 /* partial_inplace */
383 
         0x0,                   /* src_mask */
384 
         0xffffffff,            /* dst_mask */
385 
         TRUE)                  /* pcrel_offset */
386 
};
387 
 
388 
/* Retrieve a howto ptr using a BFD reloc_code.  */
389 
 
390 
static reloc_howto_type *
391 
elf_crx_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
392 
                           bfd_reloc_code_real_type code)
393 
{
394 
  unsigned int i;
395 
 
396 
  for (i = 0; i < R_CRX_MAX; i++)
397 
    if (code == crx_reloc_map[i].bfd_reloc_enum)
398 
      return &crx_elf_howto_table[crx_reloc_map[i].crx_reloc_type];
399 
 
400 
  printf ("This relocation Type is not supported -0x%x\n", code);
401 
  return 0;
402 
}
403 
 
404 
static reloc_howto_type *
405 
elf_crx_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
406 
                           const char *r_name)
407 
{
408 
  unsigned int i;
409 
 
410 
  for (i = 0;
411 
       i < sizeof (crx_elf_howto_table) / sizeof (crx_elf_howto_table[0]);
412 
       i++)
413 
    if (crx_elf_howto_table[i].name != NULL
414 
        && strcasecmp (crx_elf_howto_table[i].name, r_name) == 0)
415 
      return &crx_elf_howto_table[i];
416 
 
417 
  return NULL;
418 
}
419 
 
420 
/* Retrieve a howto ptr using an internal relocation entry.  */
421 
 
422 
static void
423 
elf_crx_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr,
424 
                       Elf_Internal_Rela *dst)
425 
{
426 
  unsigned int r_type = ELF32_R_TYPE (dst->r_info);
427 
  BFD_ASSERT (r_type < (unsigned int) R_CRX_MAX);
428 
  cache_ptr->howto = &crx_elf_howto_table[r_type];
429 
}
430 
 
431 
/* Perform a relocation as part of a final link.  */
432 
 
433 
static bfd_reloc_status_type
434 
crx_elf_final_link_relocate (reloc_howto_type *howto, bfd *input_bfd,
435 
                             bfd *output_bfd ATTRIBUTE_UNUSED,
436 
                             asection *input_section, bfd_byte *contents,
437 
                             bfd_vma offset, bfd_vma Rvalue, bfd_vma addend,
438 
                             struct bfd_link_info *info ATTRIBUTE_UNUSED,
439 
                             asection *sec ATTRIBUTE_UNUSED,
440 
                             int is_local ATTRIBUTE_UNUSED)
441 
{
442 
  unsigned short r_type = howto->type;
443 
  bfd_byte *hit_data = contents + offset;
444 
  bfd_vma reloc_bits, check;
445 
 
446 
  switch (r_type)
447 
    {
448 
     case R_CRX_IMM16:
449 
     case R_CRX_IMM32:
450 
     case R_CRX_ABS16:
451 
     case R_CRX_ABS32:
452 
     case R_CRX_REL8_CMP:
453 
     case R_CRX_REL16:
454 
     case R_CRX_REL24:
455 
     case R_CRX_REL32:
456 
     case R_CRX_REGREL12:
457 
     case R_CRX_REGREL22:
458 
     case R_CRX_REGREL28:
459 
     case R_CRX_REGREL32:
460 
       /* 'hit_data' is relative to the start of the instruction, not the
461 
          relocation offset. Advance it to account for the exact offset.  */
462 
       hit_data += 2;
463 
       break;
464 
 
465 
     case R_CRX_REL4:
466 
       /* This relocation type is used only in 'Branch if Equal to 0'
467 
          instructions and requires special handling.  */
468 
       Rvalue -= 1;
469 
       break;
470 
 
471 
     case R_CRX_NONE:
472 
       return bfd_reloc_ok;
473 
       break;
474 
 
475 
     case R_CRX_SWITCH8:
476 
     case R_CRX_SWITCH16:
477 
     case R_CRX_SWITCH32:
478 
       /* We only care about the addend, where the difference between
479 
          expressions is kept.  */
480 
       Rvalue = 0;
481 
 
482 
     default:
483 
       break;
484 
    }
485 
 
486 
  if (howto->pc_relative)
487 
    {
488 
      /* Subtract the address of the section containing the location.  */
489 
      Rvalue -= (input_section->output_section->vma
490 
                 + input_section->output_offset);
491 
      /* Subtract the position of the location within the section.  */
492 
      Rvalue -= offset;
493 
    }
494 
 
495 
  /* Add in supplied addend.  */
496 
  Rvalue += addend;
497 
 
498 
  /* Complain if the bitfield overflows, whether it is considered
499 
     as signed or unsigned.  */
500 
  check = Rvalue >> howto->rightshift;
501 
 
502 
  /* Assumes two's complement.  This expression avoids
503 
     overflow if howto->bitsize is the number of bits in
504 
     bfd_vma.  */
505 
  reloc_bits = (((1 << (howto->bitsize - 1)) - 1) << 1) | 1;
506 
 
507 
  if (((bfd_vma) check & ~reloc_bits) != 0
508 
      && (((bfd_vma) check & ~reloc_bits)
509 
          != (-(bfd_vma) 1 & ~reloc_bits)))
510 
    {
511 
      /* The above right shift is incorrect for a signed
512 
         value.  See if turning on the upper bits fixes the
513 
         overflow.  */
514 
      if (howto->rightshift && (bfd_signed_vma) Rvalue < 0)
515 
        {
516 
          check |= ((bfd_vma) - 1
517 
                    & ~((bfd_vma) - 1
518 
                        >> howto->rightshift));
519 
          if (((bfd_vma) check & ~reloc_bits)
520 
              != (-(bfd_vma) 1 & ~reloc_bits))
521 
            return bfd_reloc_overflow;
522 
        }
523 
      else
524 
        return bfd_reloc_overflow;
525 
    }
526 
 
527 
  /* Drop unwanted bits from the value we are relocating to.  */
528 
  Rvalue >>= (bfd_vma) howto->rightshift;
529 
 
530 
  /* Apply dst_mask to select only relocatable part of the insn.  */
531 
  Rvalue &= howto->dst_mask;
532 
 
533 
  switch (howto->size)
534 
    {
535 
     case 0:
536 
       if (r_type == R_CRX_REL4)
537 
         {
538 
           Rvalue <<= 4;
539 
           Rvalue |= (bfd_get_8 (input_bfd, hit_data) & 0x0f);
540 
         }
541 
 
542 
       bfd_put_8 (input_bfd, (unsigned char) Rvalue, hit_data);
543 
       break;
544 
 
545 
     case 1:
546 
       if (r_type == R_CRX_REGREL12)
547 
         Rvalue |= (bfd_get_16 (input_bfd, hit_data) & 0xf000);
548 
 
549 
       bfd_put_16 (input_bfd, Rvalue, hit_data);
550 
       break;
551 
 
552 
     case 2:
553 
       if (r_type == R_CRX_REL24
554 
           || r_type == R_CRX_REGREL22
555 
           || r_type == R_CRX_REGREL28)
556 
         Rvalue |= (((bfd_get_16 (input_bfd, hit_data) << 16) |
557 
                      bfd_get_16 (input_bfd, hit_data + 2)) & ~howto->dst_mask);
558 
 
559 
       if (r_type == R_CRX_NUM32 || r_type == R_CRX_SWITCH32)
560 
         /* Relocation on DATA is purely little-endian, that is, for a
561 
            multi-byte datum, the lowest address in memory contains the
562 
            little end of the datum, that is, the least significant byte.
563 
            Therefore we use BFD's byte Putting functions.  */
564 
         bfd_put_32 (input_bfd, Rvalue, hit_data);
565 
       else
566 
         /* Relocation on INSTRUCTIONS is different : Instructions are
567 
            word-addressable, that is, each word itself is arranged according
568 
            to little-endian convention, whereas the words are arranged with
569 
            respect to one another in BIG ENDIAN fashion.
570 
            When there is an immediate value that spans a word boundary, it is
571 
            split in a big-endian way with respect to the words.  */
572 
         {
573 
           bfd_put_16 (input_bfd, (Rvalue >> 16) & 0xffff, hit_data);
574 
           bfd_put_16 (input_bfd, Rvalue & 0xffff, hit_data + 2);
575 
         }
576 
     break;
577 
 
578 
     default:
579 
       return bfd_reloc_notsupported;
580 
    }
581 
 
582 
  return bfd_reloc_ok;
583 
}
584 
 
585 
/* Delete some bytes from a section while relaxing.  */
586 
 
587 
static bfd_boolean
588 
elf32_crx_relax_delete_bytes (struct bfd_link_info *link_info, bfd *abfd,
589 
                              asection *sec, bfd_vma addr, int count)
590 
{
591 
  Elf_Internal_Shdr *symtab_hdr;
592 
  unsigned int sec_shndx;
593 
  bfd_byte *contents;
594 
  Elf_Internal_Rela *irel, *irelend;
595 
  bfd_vma toaddr;
596 
  Elf_Internal_Sym *isym;
597 
  Elf_Internal_Sym *isymend;
598 
  struct elf_link_hash_entry **sym_hashes;
599 
  struct elf_link_hash_entry **end_hashes;
600 
  struct elf_link_hash_entry **start_hashes;
601 
  unsigned int symcount;
602 
 
603 
  sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
604 
 
605 
  contents = elf_section_data (sec)->this_hdr.contents;
606 
 
607 
  toaddr = sec->size;
608 
 
609 
  irel = elf_section_data (sec)->relocs;
610 
  irelend = irel + sec->reloc_count;
611 
 
612 
  /* Actually delete the bytes.  */
613 
  memmove (contents + addr, contents + addr + count,
614 
           (size_t) (toaddr - addr - count));
615 
  sec->size -= count;
616 
 
617 
  /* Adjust all the relocs.  */
618 
  for (irel = elf_section_data (sec)->relocs; irel < irelend; irel++)
619 
    {
620 
      /* Get the new reloc address.  */
621 
      if ((irel->r_offset > addr
622 
           && irel->r_offset < toaddr))
623 
        irel->r_offset -= count;
624 
    }
625 
 
626 
  /* Adjust the local symbols defined in this section.  */
627 
  symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
628 
  isym = (Elf_Internal_Sym *) symtab_hdr->contents;
629 
  for (isymend = isym + symtab_hdr->sh_info; isym < isymend; isym++)
630 
    {
631 
      if (isym->st_shndx == sec_shndx
632 
          && isym->st_value > addr
633 
          && isym->st_value < toaddr)
634 
        {
635 
          /* Adjust the addend of SWITCH relocations in this section,
636 
             which reference this local symbol.  */
637 
          for (irel = elf_section_data (sec)->relocs; irel < irelend; irel++)
638 
            {
639 
              unsigned long r_symndx;
640 
              Elf_Internal_Sym *rsym;
641 
              bfd_vma addsym, subsym;
642 
 
643 
              /* Skip if not a SWITCH relocation.  */
644 
              if (ELF32_R_TYPE (irel->r_info) != (int) R_CRX_SWITCH8
645 
                  && ELF32_R_TYPE (irel->r_info) != (int) R_CRX_SWITCH16
646 
                  && ELF32_R_TYPE (irel->r_info) != (int) R_CRX_SWITCH32)
647 
                  continue;
648 
 
649 
              r_symndx = ELF32_R_SYM (irel->r_info);
650 
              rsym = (Elf_Internal_Sym *) symtab_hdr->contents + r_symndx;
651 
 
652 
              /* Skip if not the local adjusted symbol.  */
653 
              if (rsym != isym)
654 
                continue;
655 
 
656 
              addsym = isym->st_value;
657 
              subsym = addsym - irel->r_addend;
658 
 
659 
              /* Fix the addend only when -->> (addsym > addr >= subsym).  */
660 
              if (subsym <= addr)
661 
                irel->r_addend -= count;
662 
              else
663 
                continue;
664 
            }
665 
 
666 
          isym->st_value -= count;
667 
        }
668 
    }
669 
 
670 
  /* Now adjust the global symbols defined in this section.  */
671 
  symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym)
672 
              - symtab_hdr->sh_info);
673 
  sym_hashes = start_hashes = elf_sym_hashes (abfd);
674 
  end_hashes = sym_hashes + symcount;
675 
 
676 
  for (; sym_hashes < end_hashes; sym_hashes++)
677 
    {
678 
      struct elf_link_hash_entry *sym_hash = *sym_hashes;
679 
 
680 
      /* The '--wrap SYMBOL' option is causing a pain when the object file,
681 
         containing the definition of __wrap_SYMBOL, includes a direct
682 
         call to SYMBOL as well. Since both __wrap_SYMBOL and SYMBOL reference
683 
         the same symbol (which is __wrap_SYMBOL), but still exist as two
684 
         different symbols in 'sym_hashes', we don't want to adjust
685 
         the global symbol __wrap_SYMBOL twice.
686 
         This check is only relevant when symbols are being wrapped.  */
687 
      if (link_info->wrap_hash != NULL)
688 
        {
689 
          struct elf_link_hash_entry **cur_sym_hashes;
690 
 
691 
          /* Loop only over the symbols whom been already checked.  */
692 
          for (cur_sym_hashes = start_hashes; cur_sym_hashes < sym_hashes;
693 
               cur_sym_hashes++)
694 
            {
695 
              /* If the current symbol is identical to 'sym_hash', that means
696 
                 the symbol was already adjusted (or at least checked).  */
697 
              if (*cur_sym_hashes == sym_hash)
698 
                break;
699 
            }
700 
          /* Don't adjust the symbol again.  */
701 
          if (cur_sym_hashes < sym_hashes)
702 
            continue;
703 
        }
704 
 
705 
      if ((sym_hash->root.type == bfd_link_hash_defined
706 
           || sym_hash->root.type == bfd_link_hash_defweak)
707 
          && sym_hash->root.u.def.section == sec
708 
          && sym_hash->root.u.def.value > addr
709 
          && sym_hash->root.u.def.value < toaddr)
710 
        sym_hash->root.u.def.value -= count;
711 
    }
712 
 
713 
  return TRUE;
714 
}
715 
 
716 
/* This is a version of bfd_generic_get_relocated_section_contents
717 
   which uses elf32_crx_relocate_section.  */
718 
 
719 
static bfd_byte *
720 
elf32_crx_get_relocated_section_contents (bfd *output_bfd,
721 
                                          struct bfd_link_info *link_info,
722 
                                          struct bfd_link_order *link_order,
723 
                                          bfd_byte *data,
724 
                                          bfd_boolean relocatable,
725 
                                          asymbol **symbols)
726 
{
727 
  Elf_Internal_Shdr *symtab_hdr;
728 
  asection *input_section = link_order->u.indirect.section;
729 
  bfd *input_bfd = input_section->owner;
730 
  asection **sections = NULL;
731 
  Elf_Internal_Rela *internal_relocs = NULL;
732 
  Elf_Internal_Sym *isymbuf = NULL;
733 
 
734 
  /* We only need to handle the case of relaxing, or of having a
735 
     particular set of section contents, specially.  */
736 
  if (relocatable
737 
      || elf_section_data (input_section)->this_hdr.contents == NULL)
738 
    return bfd_generic_get_relocated_section_contents (output_bfd, link_info,
739 
                                                       link_order, data,
740 
                                                       relocatable,
741 
                                                       symbols);
742 
 
743 
  symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
744 
 
745 
  memcpy (data, elf_section_data (input_section)->this_hdr.contents,
746 
          (size_t) input_section->size);
747 
 
748 
  if ((input_section->flags & SEC_RELOC) != 0
749 
      && input_section->reloc_count > 0)
750 
    {
751 
      Elf_Internal_Sym *isym;
752 
      Elf_Internal_Sym *isymend;
753 
      asection **secpp;
754 
      bfd_size_type amt;
755 
 
756 
      internal_relocs = (_bfd_elf_link_read_relocs
757 
                         (input_bfd, input_section, (PTR) NULL,
758 
                          (Elf_Internal_Rela *) NULL, FALSE));
759 
      if (internal_relocs == NULL)
760 
        goto error_return;
761 
 
762 
      if (symtab_hdr->sh_info != 0)
763 
        {
764 
          isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
765 
          if (isymbuf == NULL)
766 
            isymbuf = bfd_elf_get_elf_syms (input_bfd, symtab_hdr,
767 
                                            symtab_hdr->sh_info, 0,
768 
                                            NULL, NULL, NULL);
769 
          if (isymbuf == NULL)
770 
            goto error_return;
771 
        }
772 
 
773 
      amt = symtab_hdr->sh_info;
774 
      amt *= sizeof (asection *);
775 
      sections = bfd_malloc (amt);
776 
      if (sections == NULL && amt != 0)
777 
        goto error_return;
778 
 
779 
      isymend = isymbuf + symtab_hdr->sh_info;
780 
      for (isym = isymbuf, secpp = sections; isym < isymend; ++isym, ++secpp)
781 
        {
782 
          asection *isec;
783 
 
784 
          if (isym->st_shndx == SHN_UNDEF)
785 
            isec = bfd_und_section_ptr;
786 
          else if (isym->st_shndx == SHN_ABS)
787 
            isec = bfd_abs_section_ptr;
788 
          else if (isym->st_shndx == SHN_COMMON)
789 
            isec = bfd_com_section_ptr;
790 
          else
791 
            isec = bfd_section_from_elf_index (input_bfd, isym->st_shndx);
792 
 
793 
          *secpp = isec;
794 
        }
795 
 
796 
      if (! elf32_crx_relocate_section (output_bfd, link_info, input_bfd,
797 
                                     input_section, data, internal_relocs,
798 
                                     isymbuf, sections))
799 
        goto error_return;
800 
 
801 
      if (sections != NULL)
802 
        free (sections);
803 
      if (isymbuf != NULL
804 
          && symtab_hdr->contents != (unsigned char *) isymbuf)
805 
        free (isymbuf);
806 
      if (elf_section_data (input_section)->relocs != internal_relocs)
807 
        free (internal_relocs);
808 
    }
809 
 
810 
  return data;
811 
 
812 
 error_return:
813 
  if (sections != NULL)
814 
    free (sections);
815 
  if (isymbuf != NULL
816 
      && symtab_hdr->contents != (unsigned char *) isymbuf)
817 
    free (isymbuf);
818 
  if (internal_relocs != NULL
819 
      && elf_section_data (input_section)->relocs != internal_relocs)
820 
    free (internal_relocs);
821 
  return NULL;
822 
}
823 
 
824 
/* Relocate a CRX ELF section.  */
825 
 
826 
static bfd_boolean
827 
elf32_crx_relocate_section (bfd *output_bfd, struct bfd_link_info *info,
828 
                            bfd *input_bfd, asection *input_section,
829 
                            bfd_byte *contents, Elf_Internal_Rela *relocs,
830 
                            Elf_Internal_Sym *local_syms,
831 
                            asection **local_sections)
832 
{
833 
  Elf_Internal_Shdr *symtab_hdr;
834 
  struct elf_link_hash_entry **sym_hashes;
835 
  Elf_Internal_Rela *rel, *relend;
836 
 
837 
  symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
838 
  sym_hashes = elf_sym_hashes (input_bfd);
839 
 
840 
  rel = relocs;
841 
  relend = relocs + input_section->reloc_count;
842 
  for (; rel < relend; rel++)
843 
    {
844 
      int r_type;
845 
      reloc_howto_type *howto;
846 
      unsigned long r_symndx;
847 
      Elf_Internal_Sym *sym;
848 
      asection *sec;
849 
      struct elf_link_hash_entry *h;
850 
      bfd_vma relocation;
851 
      bfd_reloc_status_type r;
852 
 
853 
      r_symndx = ELF32_R_SYM (rel->r_info);
854 
      r_type = ELF32_R_TYPE (rel->r_info);
855 
      howto = crx_elf_howto_table + (r_type);
856 
 
857 
      h = NULL;
858 
      sym = NULL;
859 
      sec = NULL;
860 
      if (r_symndx < symtab_hdr->sh_info)
861 
        {
862 
          sym = local_syms + r_symndx;
863 
          sec = local_sections[r_symndx];
864 
          relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
865 
        }
866 
      else
867 
        {
868 
          bfd_boolean unresolved_reloc, warned;
869 
 
870 
          RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
871 
                                   r_symndx, symtab_hdr, sym_hashes,
872 
                                   h, sec, relocation,
873 
                                   unresolved_reloc, warned);
874 
        }
875 
 
876 
      if (sec != NULL && elf_discarded_section (sec))
877 
        RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
878 
                                         rel, relend, howto, contents);
879 
 
880 
      if (info->relocatable)
881 
        continue;
882 
 
883 
      r = crx_elf_final_link_relocate (howto, input_bfd, output_bfd,
884 
                                        input_section,
885 
                                        contents, rel->r_offset,
886 
                                        relocation, rel->r_addend,
887 
                                        info, sec, h == NULL);
888 
 
889 
      if (r != bfd_reloc_ok)
890 
        {
891 
          const char *name;
892 
          const char *msg = (const char *) 0;
893 
 
894 
          if (h != NULL)
895 
            name = h->root.root.string;
896 
          else
897 
            {
898 
              name = (bfd_elf_string_from_elf_section
899 
                      (input_bfd, symtab_hdr->sh_link, sym->st_name));
900 
              if (name == NULL || *name == '\0')
901 
                name = bfd_section_name (input_bfd, sec);
902 
            }
903 
 
904 
          switch (r)
905 
            {
906 
             case bfd_reloc_overflow:
907 
               if (!((*info->callbacks->reloc_overflow)
908 
                     (info, (h ? &h->root : NULL), name, howto->name,
909 
                      (bfd_vma) 0, input_bfd, input_section,
910 
                      rel->r_offset)))
911 
                 return FALSE;
912 
               break;
913 
 
914 
             case bfd_reloc_undefined:
915 
               if (!((*info->callbacks->undefined_symbol)
916 
                     (info, name, input_bfd, input_section,
917 
                      rel->r_offset, TRUE)))
918 
                 return FALSE;
919 
               break;
920 
 
921 
             case bfd_reloc_outofrange:
922 
               msg = _("internal error: out of range error");
923 
               goto common_error;
924 
 
925 
             case bfd_reloc_notsupported:
926 
               msg = _("internal error: unsupported relocation error");
927 
               goto common_error;
928 
 
929 
             case bfd_reloc_dangerous:
930 
               msg = _("internal error: dangerous error");
931 
               goto common_error;
932 
 
933 
             default:
934 
               msg = _("internal error: unknown error");
935 
               /* Fall through.  */
936 
 
937 
             common_error:
938 
               if (!((*info->callbacks->warning)
939 
                     (info, msg, name, input_bfd, input_section,
940 
                      rel->r_offset)))
941 
                 return FALSE;
942 
               break;
943 
            }
944 
        }
945 
    }
946 
 
947 
  return TRUE;
948 
}
949 
 
950 
/* This function handles relaxing for the CRX.
951 
 
952 
   There's quite a few relaxing opportunites available on the CRX:
953 
 
954 
        * bal/bcond:32 -> bal/bcond:16                             2 bytes
955 
        * bcond:16 -> bcond:8                                      2 bytes
956 
        * cmpbcond:24 -> cmpbcond:8                                2 bytes
957 
        * arithmetic imm32 -> arithmetic imm16                     2 bytes
958 
 
959 
   Symbol- and reloc-reading infrastructure copied from elf-m10200.c.  */
960 
 
961 
static bfd_boolean
962 
elf32_crx_relax_section (bfd *abfd, asection *sec,
963 
                         struct bfd_link_info *link_info, bfd_boolean *again)
964 
{
965 
  Elf_Internal_Shdr *symtab_hdr;
966 
  Elf_Internal_Rela *internal_relocs;
967 
  Elf_Internal_Rela *irel, *irelend;
968 
  bfd_byte *contents = NULL;
969 
  Elf_Internal_Sym *isymbuf = NULL;
970 
 
971 
  /* Assume nothing changes.  */
972 
  *again = FALSE;
973 
 
974 
  /* We don't have to do anything for a relocatable link, if
975 
     this section does not have relocs, or if this is not a
976 
     code section.  */
977 
  if (link_info->relocatable
978 
      || (sec->flags & SEC_RELOC) == 0
979 
      || sec->reloc_count == 0
980 
      || (sec->flags & SEC_CODE) == 0)
981 
    return TRUE;
982 
 
983 
  symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
984 
 
985 
  /* Get a copy of the native relocations.  */
986 
  internal_relocs = (_bfd_elf_link_read_relocs
987 
                     (abfd, sec, (PTR) NULL, (Elf_Internal_Rela *) NULL,
988 
                      link_info->keep_memory));
989 
  if (internal_relocs == NULL)
990 
    goto error_return;
991 
 
992 
  /* Walk through them looking for relaxing opportunities.  */
993 
  irelend = internal_relocs + sec->reloc_count;
994 
  for (irel = internal_relocs; irel < irelend; irel++)
995 
    {
996 
      bfd_vma symval;
997 
 
998 
      /* If this isn't something that can be relaxed, then ignore
999 
         this reloc.  */
1000 
      if (ELF32_R_TYPE (irel->r_info) != (int) R_CRX_REL32
1001 
          && ELF32_R_TYPE (irel->r_info) != (int) R_CRX_REL16
1002 
          && ELF32_R_TYPE (irel->r_info) != (int) R_CRX_REL24
1003 
          && ELF32_R_TYPE (irel->r_info) != (int) R_CRX_IMM32)
1004 
        continue;
1005 
 
1006 
      /* Get the section contents if we haven't done so already.  */
1007 
      if (contents == NULL)
1008 
        {
1009 
          /* Get cached copy if it exists.  */
1010 
          if (elf_section_data (sec)->this_hdr.contents != NULL)
1011 
            contents = elf_section_data (sec)->this_hdr.contents;
1012 
          /* Go get them off disk.  */
1013 
          else if (!bfd_malloc_and_get_section (abfd, sec, &contents))
1014 
            goto error_return;
1015 
        }
1016 
 
1017 
      /* Read this BFD's local symbols if we haven't done so already.  */
1018 
      if (isymbuf == NULL && symtab_hdr->sh_info != 0)
1019 
        {
1020 
          isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
1021 
          if (isymbuf == NULL)
1022 
            isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
1023 
                                            symtab_hdr->sh_info, 0,
1024 
                                            NULL, NULL, NULL);
1025 
          if (isymbuf == NULL)
1026 
            goto error_return;
1027 
        }
1028 
 
1029 
      /* Get the value of the symbol referred to by the reloc.  */
1030 
      if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
1031 
        {
1032 
          /* A local symbol.  */
1033 
          Elf_Internal_Sym *isym;
1034 
          asection *sym_sec;
1035 
 
1036 
          isym = isymbuf + ELF32_R_SYM (irel->r_info);
1037 
          if (isym->st_shndx == SHN_UNDEF)
1038 
            sym_sec = bfd_und_section_ptr;
1039 
          else if (isym->st_shndx == SHN_ABS)
1040 
            sym_sec = bfd_abs_section_ptr;
1041 
          else if (isym->st_shndx == SHN_COMMON)
1042 
            sym_sec = bfd_com_section_ptr;
1043 
          else
1044 
            sym_sec = bfd_section_from_elf_index (abfd, isym->st_shndx);
1045 
          symval = (isym->st_value
1046 
                    + sym_sec->output_section->vma
1047 
                    + sym_sec->output_offset);
1048 
        }
1049 
      else
1050 
        {
1051 
          unsigned long indx;
1052 
          struct elf_link_hash_entry *h;
1053 
 
1054 
          /* An external symbol.  */
1055 
          indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
1056 
          h = elf_sym_hashes (abfd)[indx];
1057 
          BFD_ASSERT (h != NULL);
1058 
 
1059 
          if (h->root.type != bfd_link_hash_defined
1060 
              && h->root.type != bfd_link_hash_defweak)
1061 
            /* This appears to be a reference to an undefined
1062 
               symbol.  Just ignore it--it will be caught by the
1063 
               regular reloc processing.  */
1064 
            continue;
1065 
 
1066 
          symval = (h->root.u.def.value
1067 
                    + h->root.u.def.section->output_section->vma
1068 
                    + h->root.u.def.section->output_offset);
1069 
        }
1070 
 
1071 
      /* For simplicity of coding, we are going to modify the section
1072 
         contents, the section relocs, and the BFD symbol table.  We
1073 
         must tell the rest of the code not to free up this
1074 
         information.  It would be possible to instead create a table
1075 
         of changes which have to be made, as is done in coff-mips.c;
1076 
         that would be more work, but would require less memory when
1077 
         the linker is run.  */
1078 
 
1079 
      /* Try to turn a 32bit pc-relative branch/call into
1080 
         a 16bit pc-relative branch/call.  */
1081 
      if (ELF32_R_TYPE (irel->r_info) == (int) R_CRX_REL32)
1082 
        {
1083 
          bfd_vma value = symval;
1084 
 
1085 
          /* Deal with pc-relative gunk.  */
1086 
          value -= (sec->output_section->vma + sec->output_offset);
1087 
          value -= irel->r_offset;
1088 
          value += irel->r_addend;
1089 
 
1090 
          /* See if the value will fit in 16 bits, note the high value is
1091 
             0xfffe + 2 as the target will be two bytes closer if we are
1092 
             able to relax.  */
1093 
          if ((long) value < 0x10000 && (long) value > -0x10002)
1094 
            {
1095 
              unsigned short code;
1096 
 
1097 
              /* Get the opcode.  */
1098 
              code = (unsigned short) bfd_get_16 (abfd, contents + irel->r_offset);
1099 
 
1100 
              /* Verify it's a 'bal'/'bcond' and fix the opcode.  */
1101 
              if ((code & 0xfff0) == 0x3170)
1102 
                bfd_put_8 (abfd, 0x30, contents + irel->r_offset + 1);
1103 
              else if ((code & 0xf0ff) == 0x707f)
1104 
                bfd_put_8 (abfd, 0x7e, contents + irel->r_offset);
1105 
              else
1106 
                continue;
1107 
 
1108 
              /* Note that we've changed the relocs, section contents, etc.  */
1109 
              elf_section_data (sec)->relocs = internal_relocs;
1110 
              elf_section_data (sec)->this_hdr.contents = contents;
1111 
              symtab_hdr->contents = (unsigned char *) isymbuf;
1112 
 
1113 
              /* Fix the relocation's type.  */
1114 
              irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
1115 
                                           R_CRX_REL16);
1116 
 
1117 
              /* Delete two bytes of data.  */
1118 
              if (!elf32_crx_relax_delete_bytes (link_info, abfd, sec,
1119 
                                                   irel->r_offset + 2, 2))
1120 
                goto error_return;
1121 
 
1122 
              /* That will change things, so, we should relax again.
1123 
                 Note that this is not required, and it may be slow.  */
1124 
              *again = TRUE;
1125 
            }
1126 
        }
1127 
 
1128 
      /* Try to turn a 16bit pc-relative branch into an
1129 
         8bit pc-relative branch.  */
1130 
      if (ELF32_R_TYPE (irel->r_info) == (int) R_CRX_REL16)
1131 
        {
1132 
          bfd_vma value = symval;
1133 
 
1134 
          /* Deal with pc-relative gunk.  */
1135 
          value -= (sec->output_section->vma + sec->output_offset);
1136 
          value -= irel->r_offset;
1137 
          value += irel->r_addend;
1138 
 
1139 
          /* See if the value will fit in 8 bits, note the high value is
1140 
             0xfc + 2 as the target will be two bytes closer if we are
1141 
             able to relax.  */
1142 
          if ((long) value < 0xfe && (long) value > -0x100)
1143 
            {
1144 
              unsigned short code;
1145 
 
1146 
              /* Get the opcode.  */
1147 
              code = (unsigned short) bfd_get_16 (abfd, contents + irel->r_offset);
1148 
 
1149 
              /* Verify it's a 'bcond' opcode.  */
1150 
              if ((code & 0xf0ff) != 0x707e)
1151 
                continue;
1152 
 
1153 
              /* Note that we've changed the relocs, section contents, etc.  */
1154 
              elf_section_data (sec)->relocs = internal_relocs;
1155 
              elf_section_data (sec)->this_hdr.contents = contents;
1156 
              symtab_hdr->contents = (unsigned char *) isymbuf;
1157 
 
1158 
              /* Fix the relocation's type.  */
1159 
              irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
1160 
                                           R_CRX_REL8);
1161 
 
1162 
              /* Delete two bytes of data.  */
1163 
              if (!elf32_crx_relax_delete_bytes (link_info, abfd, sec,
1164 
                                                   irel->r_offset + 2, 2))
1165 
                goto error_return;
1166 
 
1167 
              /* That will change things, so, we should relax again.
1168 
                 Note that this is not required, and it may be slow.  */
1169 
              *again = TRUE;
1170 
            }
1171 
        }
1172 
 
1173 
      /* Try to turn a 24bit pc-relative cmp&branch into
1174 
         an 8bit pc-relative cmp&branch.  */
1175 
      if (ELF32_R_TYPE (irel->r_info) == (int) R_CRX_REL24)
1176 
        {
1177 
          bfd_vma value = symval;
1178 
 
1179 
          /* Deal with pc-relative gunk.  */
1180 
          value -= (sec->output_section->vma + sec->output_offset);
1181 
          value -= irel->r_offset;
1182 
          value += irel->r_addend;
1183 
 
1184 
          /* See if the value will fit in 8 bits, note the high value is
1185 
             0x7e + 2 as the target will be two bytes closer if we are
1186 
             able to relax.  */
1187 
          if ((long) value < 0x100 && (long) value > -0x100)
1188 
            {
1189 
              unsigned short code;
1190 
 
1191 
              /* Get the opcode.  */
1192 
              code = (unsigned short) bfd_get_16 (abfd, contents + irel->r_offset);
1193 
 
1194 
              /* Verify it's a 'cmp&branch' opcode.  */
1195 
              if ((code & 0xfff0) != 0x3180 && (code & 0xfff0) != 0x3190
1196 
               && (code & 0xfff0) != 0x31a0 && (code & 0xfff0) != 0x31c0
1197 
               && (code & 0xfff0) != 0x31d0 && (code & 0xfff0) != 0x31e0
1198 
               /* Or a Co-processor branch ('bcop').  */
1199 
               && (code & 0xfff0) != 0x3010 && (code & 0xfff0) != 0x3110)
1200 
                continue;
1201 
 
1202 
              /* Note that we've changed the relocs, section contents, etc.  */
1203 
              elf_section_data (sec)->relocs = internal_relocs;
1204 
              elf_section_data (sec)->this_hdr.contents = contents;
1205 
              symtab_hdr->contents = (unsigned char *) isymbuf;
1206 
 
1207 
              /* Fix the opcode.  */
1208 
              bfd_put_8 (abfd, 0x30, contents + irel->r_offset + 1);
1209 
 
1210 
              /* Fix the relocation's type.  */
1211 
              irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
1212 
                                           R_CRX_REL8_CMP);
1213 
 
1214 
              /* Delete two bytes of data.  */
1215 
              if (!elf32_crx_relax_delete_bytes (link_info, abfd, sec,
1216 
                                                   irel->r_offset + 4, 2))
1217 
                goto error_return;
1218 
 
1219 
              /* That will change things, so, we should relax again.
1220 
                 Note that this is not required, and it may be slow.  */
1221 
              *again = TRUE;
1222 
            }
1223 
        }
1224 
 
1225 
      /* Try to turn a 32bit immediate address into
1226 
         a 16bit immediate address.  */
1227 
      if (ELF32_R_TYPE (irel->r_info) == (int) R_CRX_IMM32)
1228 
        {
1229 
          bfd_vma value = symval;
1230 
 
1231 
          /* See if the value will fit in 16 bits.  */
1232 
          if ((long) value < 0x7fff && (long) value > -0x8000)
1233 
            {
1234 
              unsigned short code;
1235 
 
1236 
              /* Get the opcode.  */
1237 
              code = (unsigned short) bfd_get_16 (abfd, contents + irel->r_offset);
1238 
 
1239 
              /* Verify it's a 'arithmetic double'.  */
1240 
              if ((code & 0xf0f0) != 0x20f0)
1241 
                continue;
1242 
 
1243 
              /* Note that we've changed the relocs, section contents, etc.  */
1244 
              elf_section_data (sec)->relocs = internal_relocs;
1245 
              elf_section_data (sec)->this_hdr.contents = contents;
1246 
              symtab_hdr->contents = (unsigned char *) isymbuf;
1247 
 
1248 
              /* Fix the opcode.  */
1249 
              bfd_put_8 (abfd, (code & 0xff) - 0x10, contents + irel->r_offset);
1250 
 
1251 
              /* Fix the relocation's type.  */
1252 
              irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
1253 
                                           R_CRX_IMM16);
1254 
 
1255 
              /* Delete two bytes of data.  */
1256 
              if (!elf32_crx_relax_delete_bytes (link_info, abfd, sec,
1257 
                                                   irel->r_offset + 2, 2))
1258 
                goto error_return;
1259 
 
1260 
              /* That will change things, so, we should relax again.
1261 
                 Note that this is not required, and it may be slow.  */
1262 
              *again = TRUE;
1263 
            }
1264 
        }
1265 
    }
1266 
 
1267 
  if (isymbuf != NULL
1268 
      && symtab_hdr->contents != (unsigned char *) isymbuf)
1269 
    {
1270 
      if (! link_info->keep_memory)
1271 
        free (isymbuf);
1272 
      else
1273 
        {
1274 
          /* Cache the symbols for elf_link_input_bfd.  */
1275 
          symtab_hdr->contents = (unsigned char *) isymbuf;
1276 
        }
1277 
    }
1278 
 
1279 
  if (contents != NULL
1280 
      && elf_section_data (sec)->this_hdr.contents != contents)
1281 
    {
1282 
      if (! link_info->keep_memory)
1283 
        free (contents);
1284 
      else
1285 
        {
1286 
          /* Cache the section contents for elf_link_input_bfd.  */
1287 
          elf_section_data (sec)->this_hdr.contents = contents;
1288 
        }
1289 
    }
1290 
 
1291 
  if (internal_relocs != NULL
1292 
      && elf_section_data (sec)->relocs != internal_relocs)
1293 
    free (internal_relocs);
1294 
 
1295 
  return TRUE;
1296 
 
1297 
 error_return:
1298 
  if (isymbuf != NULL
1299 
      && symtab_hdr->contents != (unsigned char *) isymbuf)
1300 
    free (isymbuf);
1301 
  if (contents != NULL
1302 
      && elf_section_data (sec)->this_hdr.contents != contents)
1303 
    free (contents);
1304 
  if (internal_relocs != NULL
1305 
      && elf_section_data (sec)->relocs != internal_relocs)
1306 
    free (internal_relocs);
1307 
 
1308 
  return FALSE;
1309 
}
1310 
 
1311 
/* Definitions for setting CRX target vector.  */
1312 
#define TARGET_LITTLE_SYM               bfd_elf32_crx_vec
1313 
#define TARGET_LITTLE_NAME              "elf32-crx"
1314 
#define ELF_ARCH                        bfd_arch_crx
1315 
#define ELF_MACHINE_CODE                EM_CRX
1316 
#define ELF_MAXPAGESIZE                 0x1
1317 
#define elf_symbol_leading_char         '_'
1318 
 
1319 
#define bfd_elf32_bfd_reloc_type_lookup elf_crx_reloc_type_lookup
1320 
#define bfd_elf32_bfd_reloc_name_lookup \
1321 
                                        elf_crx_reloc_name_lookup
1322 
#define elf_info_to_howto               elf_crx_info_to_howto
1323 
#define elf_info_to_howto_rel           0
1324 
#define elf_backend_relocate_section    elf32_crx_relocate_section
1325 
#define bfd_elf32_bfd_relax_section     elf32_crx_relax_section
1326 
#define bfd_elf32_bfd_get_relocated_section_contents \
1327 
                                elf32_crx_get_relocated_section_contents
1328 
#define elf_backend_can_gc_sections     1
1329 
#define elf_backend_rela_normal         1
1330 
 
1331 
#include "elf32-target.h"

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