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[/] [openrisc/] [trunk/] [gnu-stable/] [gdb-7.2/] [bfd/] [elf32-msp430.c] - Blame information for rev 835

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1 330 jeremybenn 
/*  MSP430-specific support for 32-bit ELF
2 
    Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2010
3 
    Free Software Foundation, Inc.
4 
    Contributed by Dmitry Diky <diwil@mail.ru>
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 "libiberty.h"
26 
#include "libbfd.h"
27 
#include "elf-bfd.h"
28 
#include "elf/msp430.h"
29 
 
30 
/* Use RELA instead of REL.  */
31 
#undef USE_REL
32 
 
33 
static reloc_howto_type elf_msp430_howto_table[] =
34 
{
35 
  HOWTO (R_MSP430_NONE,         /* type */
36 
         0,                      /* rightshift */
37 
         2,                     /* size (0 = byte, 1 = short, 2 = long) */
38 
         32,                    /* bitsize */
39 
         FALSE,                 /* pc_relative */
40 
         0,                      /* bitpos */
41 
         complain_overflow_bitfield,/* complain_on_overflow */
42 
         bfd_elf_generic_reloc, /* special_function */
43 
         "R_MSP430_NONE",       /* name */
44 
         FALSE,                 /* partial_inplace */
45 
         0,                      /* src_mask */
46 
         0,                      /* dst_mask */
47 
         FALSE),                /* pcrel_offset */
48 
 
49 
  HOWTO (R_MSP430_32,           /* type */
50 
         0,                      /* rightshift */
51 
         2,                     /* size (0 = byte, 1 = short, 2 = long) */
52 
         32,                    /* bitsize */
53 
         FALSE,                 /* pc_relative */
54 
         0,                      /* bitpos */
55 
         complain_overflow_bitfield,/* complain_on_overflow */
56 
         bfd_elf_generic_reloc, /* special_function */
57 
         "R_MSP430_32",         /* name */
58 
         FALSE,                 /* partial_inplace */
59 
         0xffffffff,            /* src_mask */
60 
         0xffffffff,            /* dst_mask */
61 
         FALSE),                /* pcrel_offset */
62 
 
63 
  /* A 13 bit PC relative relocation.  */
64 
  HOWTO (R_MSP430_10_PCREL,     /* type */
65 
         1,                     /* rightshift */
66 
         1,                     /* size (0 = byte, 1 = short, 2 = long) */
67 
         10,                    /* bitsize */
68 
         TRUE,                  /* pc_relative */
69 
         0,                      /* bitpos */
70 
         complain_overflow_bitfield,/* complain_on_overflow */
71 
         bfd_elf_generic_reloc, /* special_function */
72 
         "R_MSP430_13_PCREL",   /* name */
73 
         FALSE,                 /* partial_inplace */
74 
         0xfff,                 /* src_mask */
75 
         0xfff,                 /* dst_mask */
76 
         TRUE),                 /* pcrel_offset */
77 
 
78 
  /* A 16 bit absolute relocation.  */
79 
  HOWTO (R_MSP430_16,           /* type */
80 
         0,                      /* rightshift */
81 
         1,                     /* size (0 = byte, 1 = short, 2 = long) */
82 
         16,                    /* bitsize */
83 
         FALSE,                 /* pc_relative */
84 
         0,                      /* bitpos */
85 
         complain_overflow_dont,/* complain_on_overflow */
86 
         bfd_elf_generic_reloc, /* special_function */
87 
         "R_MSP430_16",         /* name */
88 
         FALSE,                 /* partial_inplace */
89 
         0,                      /* src_mask */
90 
         0xffff,                /* dst_mask */
91 
         FALSE),                /* pcrel_offset */
92 
 
93 
  /* A 16 bit absolute relocation for command address.  */
94 
  HOWTO (R_MSP430_16_PCREL,     /* type */
95 
         1,                     /* rightshift */
96 
         1,                     /* size (0 = byte, 1 = short, 2 = long) */
97 
         16,                    /* bitsize */
98 
         TRUE,                  /* pc_relative */
99 
         0,                      /* bitpos */
100 
         complain_overflow_dont,/* complain_on_overflow */
101 
         bfd_elf_generic_reloc, /* special_function */
102 
         "R_MSP430_16_PCREL",   /* name */
103 
         FALSE,                 /* partial_inplace */
104 
         0,                      /* src_mask */
105 
         0xffff,                /* dst_mask */
106 
         TRUE),                 /* pcrel_offset */
107 
 
108 
  /* A 16 bit absolute relocation, byte operations.  */
109 
  HOWTO (R_MSP430_16_BYTE,      /* type */
110 
         0,                      /* rightshift */
111 
         1,                     /* size (0 = byte, 1 = short, 2 = long) */
112 
         16,                    /* bitsize */
113 
         FALSE,                 /* pc_relative */
114 
         0,                      /* bitpos */
115 
         complain_overflow_dont,/* complain_on_overflow */
116 
         bfd_elf_generic_reloc, /* special_function */
117 
         "R_MSP430_16_BYTE",    /* name */
118 
         FALSE,                 /* partial_inplace */
119 
         0xffff,                /* src_mask */
120 
         0xffff,                /* dst_mask */
121 
         FALSE),                /* pcrel_offset */
122 
 
123 
  /* A 16 bit absolute relocation for command address.  */
124 
  HOWTO (R_MSP430_16_PCREL_BYTE,/* type */
125 
         1,                     /* rightshift */
126 
         1,                     /* size (0 = byte, 1 = short, 2 = long) */
127 
         16,                    /* bitsize */
128 
         TRUE,                  /* pc_relative */
129 
         0,                      /* bitpos */
130 
         complain_overflow_dont,/* complain_on_overflow */
131 
         bfd_elf_generic_reloc, /* special_function */
132 
         "R_MSP430_16_PCREL_BYTE",/* name */
133 
         FALSE,                 /* partial_inplace */
134 
         0xffff,                /* src_mask */
135 
         0xffff,                /* dst_mask */
136 
         TRUE),                 /* pcrel_offset */
137 
 
138 
  /* A 13 bit PC relative relocation for complicated polymorphs.  */
139 
  HOWTO (R_MSP430_2X_PCREL,     /* type */
140 
         1,                     /* rightshift */
141 
         2,                     /* size (0 = byte, 1 = short, 2 = long) */
142 
         10,                    /* bitsize */
143 
         TRUE,                  /* pc_relative */
144 
         0,                      /* bitpos */
145 
         complain_overflow_bitfield,/* complain_on_overflow */
146 
         bfd_elf_generic_reloc, /* special_function */
147 
         "R_MSP430_2X_PCREL",   /* name */
148 
         FALSE,                 /* partial_inplace */
149 
         0xfff,                 /* src_mask */
150 
         0xfff,                 /* dst_mask */
151 
         TRUE),                 /* pcrel_offset */
152 
 
153 
  /* A 16 bit relaxable relocation for command address.  */
154 
  HOWTO (R_MSP430_RL_PCREL,     /* type */
155 
         1,                     /* rightshift */
156 
         1,                     /* size (0 = byte, 1 = short, 2 = long) */
157 
         16,                    /* bitsize */
158 
         TRUE,                  /* pc_relative */
159 
         0,                      /* bitpos */
160 
         complain_overflow_dont,/* complain_on_overflow */
161 
         bfd_elf_generic_reloc, /* special_function */
162 
         "R_MSP430_RL_PCREL",   /* name */
163 
         FALSE,                 /* partial_inplace */
164 
         0,                      /* src_mask */
165 
         0xffff,                /* dst_mask */
166 
         TRUE)                  /* pcrel_offset */
167 
};
168 
 
169 
/* Map BFD reloc types to MSP430 ELF reloc types.  */
170 
 
171 
struct msp430_reloc_map
172 
{
173 
  bfd_reloc_code_real_type bfd_reloc_val;
174 
  unsigned int elf_reloc_val;
175 
};
176 
 
177 
static const struct msp430_reloc_map msp430_reloc_map[] =
178 
  {
179 
    {BFD_RELOC_NONE,                 R_MSP430_NONE},
180 
    {BFD_RELOC_32,                   R_MSP430_32},
181 
    {BFD_RELOC_MSP430_10_PCREL,      R_MSP430_10_PCREL},
182 
    {BFD_RELOC_16,                   R_MSP430_16_BYTE},
183 
    {BFD_RELOC_MSP430_16_PCREL,      R_MSP430_16_PCREL},
184 
    {BFD_RELOC_MSP430_16,            R_MSP430_16},
185 
    {BFD_RELOC_MSP430_16_PCREL_BYTE, R_MSP430_16_PCREL_BYTE},
186 
    {BFD_RELOC_MSP430_16_BYTE,       R_MSP430_16_BYTE},
187 
    {BFD_RELOC_MSP430_2X_PCREL,      R_MSP430_2X_PCREL},
188 
    {BFD_RELOC_MSP430_RL_PCREL,      R_MSP430_RL_PCREL}
189 
  };
190 
 
191 
static reloc_howto_type *
192 
bfd_elf32_bfd_reloc_type_lookup (bfd * abfd ATTRIBUTE_UNUSED,
193 
                                 bfd_reloc_code_real_type code)
194 
{
195 
  unsigned int i;
196 
 
197 
  for (i = 0; i < ARRAY_SIZE (msp430_reloc_map); i++)
198 
    if (msp430_reloc_map[i].bfd_reloc_val == code)
199 
      return &elf_msp430_howto_table[msp430_reloc_map[i].elf_reloc_val];
200 
 
201 
  return NULL;
202 
}
203 
 
204 
static reloc_howto_type *
205 
bfd_elf32_bfd_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
206 
                                 const char *r_name)
207 
{
208 
  unsigned int i;
209 
 
210 
  for (i = 0;
211 
       i < (sizeof (elf_msp430_howto_table)
212 
            / sizeof (elf_msp430_howto_table[0]));
213 
       i++)
214 
    if (elf_msp430_howto_table[i].name != NULL
215 
        && strcasecmp (elf_msp430_howto_table[i].name, r_name) == 0)
216 
      return &elf_msp430_howto_table[i];
217 
 
218 
  return NULL;
219 
}
220 
 
221 
/* Set the howto pointer for an MSP430 ELF reloc.  */
222 
 
223 
static void
224 
msp430_info_to_howto_rela (bfd * abfd ATTRIBUTE_UNUSED,
225 
                           arelent * cache_ptr,
226 
                           Elf_Internal_Rela * dst)
227 
{
228 
  unsigned int r_type;
229 
 
230 
  r_type = ELF32_R_TYPE (dst->r_info);
231 
  BFD_ASSERT (r_type < (unsigned int) R_MSP430_max);
232 
  cache_ptr->howto = &elf_msp430_howto_table[r_type];
233 
}
234 
 
235 
/* Look through the relocs for a section during the first phase.
236 
   Since we don't do .gots or .plts, we just need to consider the
237 
   virtual table relocs for gc.  */
238 
 
239 
static bfd_boolean
240 
elf32_msp430_check_relocs (bfd * abfd, struct bfd_link_info * info,
241 
                           asection * sec, const Elf_Internal_Rela * relocs)
242 
{
243 
  Elf_Internal_Shdr *symtab_hdr;
244 
  struct elf_link_hash_entry **sym_hashes;
245 
  const Elf_Internal_Rela *rel;
246 
  const Elf_Internal_Rela *rel_end;
247 
 
248 
  if (info->relocatable)
249 
    return TRUE;
250 
 
251 
  symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
252 
  sym_hashes = elf_sym_hashes (abfd);
253 
 
254 
  rel_end = relocs + sec->reloc_count;
255 
  for (rel = relocs; rel < rel_end; rel++)
256 
    {
257 
      struct elf_link_hash_entry *h;
258 
      unsigned long r_symndx;
259 
 
260 
      r_symndx = ELF32_R_SYM (rel->r_info);
261 
      if (r_symndx < symtab_hdr->sh_info)
262 
        h = NULL;
263 
      else
264 
        {
265 
          h = sym_hashes[r_symndx - symtab_hdr->sh_info];
266 
          while (h->root.type == bfd_link_hash_indirect
267 
                 || h->root.type == bfd_link_hash_warning)
268 
            h = (struct elf_link_hash_entry *) h->root.u.i.link;
269 
        }
270 
    }
271 
 
272 
  return TRUE;
273 
}
274 
 
275 
/* Perform a single relocation.  By default we use the standard BFD
276 
   routines, but a few relocs, we have to do them ourselves.  */
277 
 
278 
static bfd_reloc_status_type
279 
msp430_final_link_relocate (reloc_howto_type * howto, bfd * input_bfd,
280 
                            asection * input_section, bfd_byte * contents,
281 
                            Elf_Internal_Rela * rel, bfd_vma relocation)
282 
{
283 
  bfd_reloc_status_type r = bfd_reloc_ok;
284 
  bfd_vma x;
285 
  bfd_signed_vma srel;
286 
 
287 
  switch (howto->type)
288 
    {
289 
    case R_MSP430_10_PCREL:
290 
      contents += rel->r_offset;
291 
      srel = (bfd_signed_vma) relocation;
292 
      srel += rel->r_addend;
293 
      srel -= rel->r_offset;
294 
      srel -= 2;                /* Branch instructions add 2 to the PC...  */
295 
      srel -= (input_section->output_section->vma +
296 
               input_section->output_offset);
297 
 
298 
      if (srel & 1)
299 
        return bfd_reloc_outofrange;
300 
 
301 
      /* MSP430 addresses commands as words.  */
302 
      srel >>= 1;
303 
 
304 
      /* Check for an overflow.  */
305 
      if (srel < -512 || srel > 511)
306 
        return bfd_reloc_overflow;
307 
 
308 
      x = bfd_get_16 (input_bfd, contents);
309 
      x = (x & 0xfc00) | (srel & 0x3ff);
310 
      bfd_put_16 (input_bfd, x, contents);
311 
      break;
312 
 
313 
    case R_MSP430_2X_PCREL:
314 
      contents += rel->r_offset;
315 
      srel = (bfd_signed_vma) relocation;
316 
      srel += rel->r_addend;
317 
      srel -= rel->r_offset;
318 
      srel -= 2;                /* Branch instructions add 2 to the PC...  */
319 
      srel -= (input_section->output_section->vma +
320 
               input_section->output_offset);
321 
 
322 
      if (srel & 1)
323 
        return bfd_reloc_outofrange;
324 
 
325 
      /* MSP430 addresses commands as words.  */
326 
      srel >>= 1;
327 
 
328 
      /* Check for an overflow.  */
329 
      if (srel < -512 || srel > 511)
330 
        return bfd_reloc_overflow;
331 
 
332 
      x = bfd_get_16 (input_bfd, contents);
333 
      x = (x & 0xfc00) | (srel & 0x3ff);
334 
      bfd_put_16 (input_bfd, x, contents);
335 
      /* Handle second jump instruction.  */
336 
      x = bfd_get_16 (input_bfd, contents - 2);
337 
      srel += 1;
338 
      x = (x & 0xfc00) | (srel & 0x3ff);
339 
      bfd_put_16 (input_bfd, x, contents - 2);
340 
      break;
341 
 
342 
    case R_MSP430_16_PCREL:
343 
    case R_MSP430_RL_PCREL:
344 
      contents += rel->r_offset;
345 
      srel = (bfd_signed_vma) relocation;
346 
      srel += rel->r_addend;
347 
      srel -= rel->r_offset;
348 
      /* Only branch instructions add 2 to the PC...  */
349 
      srel -= (input_section->output_section->vma +
350 
               input_section->output_offset);
351 
 
352 
      if (srel & 1)
353 
        return bfd_reloc_outofrange;
354 
 
355 
      bfd_put_16 (input_bfd, srel & 0xffff, contents);
356 
      break;
357 
 
358 
    case R_MSP430_16_PCREL_BYTE:
359 
      contents += rel->r_offset;
360 
      srel = (bfd_signed_vma) relocation;
361 
      srel += rel->r_addend;
362 
      srel -= rel->r_offset;
363 
      /* Only branch instructions add 2 to the PC...  */
364 
      srel -= (input_section->output_section->vma +
365 
               input_section->output_offset);
366 
 
367 
      bfd_put_16 (input_bfd, srel & 0xffff, contents);
368 
      break;
369 
 
370 
    case R_MSP430_16_BYTE:
371 
      contents += rel->r_offset;
372 
      srel = (bfd_signed_vma) relocation;
373 
      srel += rel->r_addend;
374 
      bfd_put_16 (input_bfd, srel & 0xffff, contents);
375 
      break;
376 
 
377 
    case R_MSP430_16:
378 
      contents += rel->r_offset;
379 
      srel = (bfd_signed_vma) relocation;
380 
      srel += rel->r_addend;
381 
 
382 
      if (srel & 1)
383 
        return bfd_reloc_notsupported;
384 
 
385 
      bfd_put_16 (input_bfd, srel & 0xffff, contents);
386 
      break;
387 
 
388 
    default:
389 
      r = _bfd_final_link_relocate (howto, input_bfd, input_section,
390 
                                    contents, rel->r_offset,
391 
                                    relocation, rel->r_addend);
392 
    }
393 
 
394 
  return r;
395 
}
396 
 
397 
/* Relocate an MSP430 ELF section.  */
398 
 
399 
static bfd_boolean
400 
elf32_msp430_relocate_section (bfd * output_bfd ATTRIBUTE_UNUSED,
401 
                               struct bfd_link_info * info,
402 
                               bfd * input_bfd,
403 
                               asection * input_section,
404 
                               bfd_byte * contents,
405 
                               Elf_Internal_Rela * relocs,
406 
                               Elf_Internal_Sym * local_syms,
407 
                               asection ** local_sections)
408 
{
409 
  Elf_Internal_Shdr *symtab_hdr;
410 
  struct elf_link_hash_entry **sym_hashes;
411 
  Elf_Internal_Rela *rel;
412 
  Elf_Internal_Rela *relend;
413 
 
414 
  symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
415 
  sym_hashes = elf_sym_hashes (input_bfd);
416 
  relend = relocs + input_section->reloc_count;
417 
 
418 
  for (rel = relocs; rel < relend; rel++)
419 
    {
420 
      reloc_howto_type *howto;
421 
      unsigned long r_symndx;
422 
      Elf_Internal_Sym *sym;
423 
      asection *sec;
424 
      struct elf_link_hash_entry *h;
425 
      bfd_vma relocation;
426 
      bfd_reloc_status_type r;
427 
      const char *name = NULL;
428 
      int r_type;
429 
 
430 
      r_type = ELF32_R_TYPE (rel->r_info);
431 
      r_symndx = ELF32_R_SYM (rel->r_info);
432 
      howto = elf_msp430_howto_table + r_type;
433 
      h = NULL;
434 
      sym = NULL;
435 
      sec = NULL;
436 
 
437 
      if (r_symndx < symtab_hdr->sh_info)
438 
        {
439 
          sym = local_syms + r_symndx;
440 
          sec = local_sections[r_symndx];
441 
          relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
442 
 
443 
          name = bfd_elf_string_from_elf_section
444 
              (input_bfd, symtab_hdr->sh_link, sym->st_name);
445 
          name = (name == NULL) ? bfd_section_name (input_bfd, sec) : name;
446 
        }
447 
      else
448 
        {
449 
          bfd_boolean unresolved_reloc, warned;
450 
 
451 
          RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
452 
                                   r_symndx, symtab_hdr, sym_hashes,
453 
                                   h, sec, relocation,
454 
                                   unresolved_reloc, warned);
455 
        }
456 
 
457 
      if (sec != NULL && elf_discarded_section (sec))
458 
        {
459 
          /* For relocs against symbols from removed linkonce sections,
460 
             or sections discarded by a linker script, we just want the
461 
             section contents zeroed.  Avoid any special processing.  */
462 
          _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset);
463 
          rel->r_info = 0;
464 
          rel->r_addend = 0;
465 
          continue;
466 
        }
467 
 
468 
      if (info->relocatable)
469 
        continue;
470 
 
471 
      r = msp430_final_link_relocate (howto, input_bfd, input_section,
472 
                                      contents, rel, relocation);
473 
 
474 
      if (r != bfd_reloc_ok)
475 
        {
476 
          const char *msg = (const char *) NULL;
477 
 
478 
          switch (r)
479 
            {
480 
            case bfd_reloc_overflow:
481 
              r = info->callbacks->reloc_overflow
482 
                  (info, (h ? &h->root : NULL), name, howto->name,
483 
                   (bfd_vma) 0, input_bfd, input_section,
484 
                   rel->r_offset);
485 
              break;
486 
 
487 
            case bfd_reloc_undefined:
488 
              r = info->callbacks->undefined_symbol
489 
                  (info, name, input_bfd, input_section, rel->r_offset, TRUE);
490 
              break;
491 
 
492 
            case bfd_reloc_outofrange:
493 
              msg = _("internal error: out of range error");
494 
              break;
495 
 
496 
            case bfd_reloc_notsupported:
497 
              msg = _("internal error: unsupported relocation error");
498 
              break;
499 
 
500 
            case bfd_reloc_dangerous:
501 
              msg = _("internal error: dangerous relocation");
502 
              break;
503 
 
504 
            default:
505 
              msg = _("internal error: unknown error");
506 
              break;
507 
            }
508 
 
509 
          if (msg)
510 
            r = info->callbacks->warning
511 
                (info, msg, name, input_bfd, input_section, rel->r_offset);
512 
 
513 
          if (!r)
514 
            return FALSE;
515 
        }
516 
 
517 
    }
518 
 
519 
  return TRUE;
520 
}
521 
 
522 
/* The final processing done just before writing out a MSP430 ELF object
523 
   file.  This gets the MSP430 architecture right based on the machine
524 
   number.  */
525 
 
526 
static void
527 
bfd_elf_msp430_final_write_processing (bfd * abfd,
528 
                                       bfd_boolean linker ATTRIBUTE_UNUSED)
529 
{
530 
  unsigned long val;
531 
 
532 
  switch (bfd_get_mach (abfd))
533 
    {
534 
    default:
535 
    case bfd_mach_msp110:
536 
      val = E_MSP430_MACH_MSP430x11x1;
537 
      break;
538 
 
539 
    case bfd_mach_msp11:
540 
      val = E_MSP430_MACH_MSP430x11;
541 
      break;
542 
 
543 
    case bfd_mach_msp12:
544 
      val = E_MSP430_MACH_MSP430x12;
545 
      break;
546 
 
547 
    case bfd_mach_msp13:
548 
      val = E_MSP430_MACH_MSP430x13;
549 
      break;
550 
 
551 
    case bfd_mach_msp14:
552 
      val = E_MSP430_MACH_MSP430x14;
553 
      break;
554 
 
555 
    case bfd_mach_msp15:
556 
      val = E_MSP430_MACH_MSP430x15;
557 
      break;
558 
 
559 
    case bfd_mach_msp16:
560 
      val = E_MSP430_MACH_MSP430x16;
561 
      break;
562 
 
563 
    case bfd_mach_msp31:
564 
      val = E_MSP430_MACH_MSP430x31;
565 
      break;
566 
 
567 
    case bfd_mach_msp32:
568 
      val = E_MSP430_MACH_MSP430x32;
569 
      break;
570 
 
571 
    case bfd_mach_msp33:
572 
      val = E_MSP430_MACH_MSP430x33;
573 
      break;
574 
 
575 
    case bfd_mach_msp41:
576 
      val = E_MSP430_MACH_MSP430x41;
577 
      break;
578 
 
579 
    case bfd_mach_msp42:
580 
      val = E_MSP430_MACH_MSP430x42;
581 
      break;
582 
 
583 
    case bfd_mach_msp43:
584 
      val = E_MSP430_MACH_MSP430x43;
585 
      break;
586 
 
587 
    case bfd_mach_msp44:
588 
      val = E_MSP430_MACH_MSP430x44;
589 
      break;
590 
    }
591 
 
592 
  elf_elfheader (abfd)->e_machine = EM_MSP430;
593 
  elf_elfheader (abfd)->e_flags &= ~EF_MSP430_MACH;
594 
  elf_elfheader (abfd)->e_flags |= val;
595 
}
596 
 
597 
/* Set the right machine number.  */
598 
 
599 
static bfd_boolean
600 
elf32_msp430_object_p (bfd * abfd)
601 
{
602 
  int e_set = bfd_mach_msp14;
603 
 
604 
  if (elf_elfheader (abfd)->e_machine == EM_MSP430
605 
      || elf_elfheader (abfd)->e_machine == EM_MSP430_OLD)
606 
    {
607 
      int e_mach = elf_elfheader (abfd)->e_flags & EF_MSP430_MACH;
608 
 
609 
      switch (e_mach)
610 
        {
611 
        default:
612 
        case E_MSP430_MACH_MSP430x11:
613 
          e_set = bfd_mach_msp11;
614 
          break;
615 
 
616 
        case E_MSP430_MACH_MSP430x11x1:
617 
          e_set = bfd_mach_msp110;
618 
          break;
619 
 
620 
        case E_MSP430_MACH_MSP430x12:
621 
          e_set = bfd_mach_msp12;
622 
          break;
623 
 
624 
        case E_MSP430_MACH_MSP430x13:
625 
          e_set = bfd_mach_msp13;
626 
          break;
627 
 
628 
        case E_MSP430_MACH_MSP430x14:
629 
          e_set = bfd_mach_msp14;
630 
          break;
631 
 
632 
        case E_MSP430_MACH_MSP430x15:
633 
          e_set = bfd_mach_msp15;
634 
          break;
635 
 
636 
        case E_MSP430_MACH_MSP430x16:
637 
          e_set = bfd_mach_msp16;
638 
          break;
639 
 
640 
        case E_MSP430_MACH_MSP430x31:
641 
          e_set = bfd_mach_msp31;
642 
          break;
643 
 
644 
        case E_MSP430_MACH_MSP430x32:
645 
          e_set = bfd_mach_msp32;
646 
          break;
647 
 
648 
        case E_MSP430_MACH_MSP430x33:
649 
          e_set = bfd_mach_msp33;
650 
          break;
651 
 
652 
        case E_MSP430_MACH_MSP430x41:
653 
          e_set = bfd_mach_msp41;
654 
          break;
655 
 
656 
        case E_MSP430_MACH_MSP430x42:
657 
          e_set = bfd_mach_msp42;
658 
          break;
659 
 
660 
        case E_MSP430_MACH_MSP430x43:
661 
          e_set = bfd_mach_msp43;
662 
          break;
663 
 
664 
        case E_MSP430_MACH_MSP430x44:
665 
          e_set = bfd_mach_msp44;
666 
          break;
667 
        }
668 
    }
669 
 
670 
  return bfd_default_set_arch_mach (abfd, bfd_arch_msp430, e_set);
671 
}
672 
 
673 
/* These functions handle relaxing for the msp430.
674 
   Relaxation required only in two cases:
675 
    - Bad hand coding like jumps from one section to another or
676 
      from file to file.
677 
    - Sibling calls. This will affect onlu 'jump label' polymorph. Without
678 
      relaxing this enlarges code by 2 bytes. Sibcalls implemented but
679 
      do not work in gcc's port by the reason I do not know.
680 
   Anyway, if a relaxation required, user should pass -relax option to the
681 
   linker.
682 
 
683 
   There are quite a few relaxing opportunities available on the msp430:
684 
 
685 
   ================================================================
686 
 
687 
   1. 3 words -> 1 word
688 
 
689 
   eq      ==      jeq label                    jne +4; br lab
690 
   ne      !=      jne label                    jeq +4; br lab
691 
   lt      <       jl  label                    jge +4; br lab
692 
   ltu     <       jlo label                    lhs +4; br lab
693 
   ge      >=      jge label                    jl  +4; br lab
694 
   geu     >=      jhs label                    jlo +4; br lab
695 
 
696 
   2. 4 words -> 1 word
697 
 
698 
   ltn     <       jn                      jn  +2; jmp +4; br lab
699 
 
700 
   3. 4 words -> 2 words
701 
 
702 
   gt      >       jeq +2; jge label       jeq +6; jl  +4; br label
703 
   gtu     >       jeq +2; jhs label       jeq +6; jlo +4; br label
704 
 
705 
   4. 4 words -> 2 words and 2 labels
706 
 
707 
   leu     <=      jeq label; jlo label    jeq +2; jhs +4; br label
708 
   le      <=      jeq label; jl  label    jeq +2; jge +4; br label
709 
   =================================================================
710 
 
711 
   codemap for first cases is (labels masked ):
712 
              eq:       0x2002,0x4010,0x0000 -> 0x2400
713 
              ne:       0x2402,0x4010,0x0000 -> 0x2000
714 
              lt:       0x3402,0x4010,0x0000 -> 0x3800
715 
              ltu:      0x2c02,0x4010,0x0000 -> 0x2800
716 
              ge:       0x3802,0x4010,0x0000 -> 0x3400
717 
              geu:      0x2802,0x4010,0x0000 -> 0x2c00
718 
 
719 
  second case:
720 
              ltn:      0x3001,0x3c02,0x4010,0x0000 -> 0x3000
721 
 
722 
  third case:
723 
              gt:       0x2403,0x3802,0x4010,0x0000 -> 0x2401,0x3400
724 
              gtu:      0x2403,0x2802,0x4010,0x0000 -> 0x2401,0x2c00
725 
 
726 
  fourth case:
727 
              leu:      0x2401,0x2c02,0x4010,0x0000 -> 0x2400,0x2800
728 
              le:       0x2401,0x3402,0x4010,0x0000 -> 0x2400,0x3800
729 
 
730 
  Unspecified case :)
731 
              jump:     0x4010,0x0000 -> 0x3c00.  */
732 
 
733 
#define NUMB_RELAX_CODES        12
734 
static struct rcodes_s
735 
{
736 
  int f0, f1;                   /* From code.  */
737 
  int t0, t1;                   /* To code.  */
738 
  int labels;                   /* Position of labels: 1 - one label at first
739 
                                   word, 2 - one at second word, 3 - two
740 
                                   labels at both.  */
741 
  int cdx;                      /* Words to match.  */
742 
  int bs;                       /* Shrink bytes.  */
743 
  int off;                      /* Offset from old label for new code.  */
744 
  int ncl;                      /* New code length.  */
745 
} rcode[] =
746 
{/*                               lab,cdx,bs,off,ncl */
747 
  { 0x0000, 0x0000, 0x3c00, 0x0000, 1, 0, 2, 2,   2},    /* jump */
748 
  { 0x0000, 0x2002, 0x2400, 0x0000, 1, 1, 4, 4,  2},    /* eq */
749 
  { 0x0000, 0x2402, 0x2000, 0x0000, 1, 1, 4, 4,  2},    /* ne */
750 
  { 0x0000, 0x3402, 0x3800, 0x0000, 1, 1, 4, 4,  2},    /* lt */
751 
  { 0x0000, 0x2c02, 0x2800, 0x0000, 1, 1, 4, 4,  2},    /* ltu */
752 
  { 0x0000, 0x3802, 0x3400, 0x0000, 1, 1, 4, 4,  2},    /* ge */
753 
  { 0x0000, 0x2802, 0x2c00, 0x0000, 1, 1, 4, 4,  2},    /* geu */
754 
  { 0x3001, 0x3c02, 0x3000, 0x0000, 1, 2, 6, 6,  2},    /* ltn */
755 
  { 0x2403, 0x3802, 0x2401, 0x3400, 2, 2, 4, 6,  4},    /* gt */
756 
  { 0x2403, 0x2802, 0x2401, 0x2c00, 2, 2, 4, 6,  4},    /* gtu */
757 
  { 0x2401, 0x2c02, 0x2400, 0x2800, 3, 2, 4, 6,  4},    /* leu , 2 labels */
758 
  { 0x2401, 0x2c02, 0x2400, 0x2800, 3, 2, 4, 6,  4},    /* le  , 2 labels */
759 
  { 0,       0,       0,       0,       0, 0, 0, 0,  0}
760 
};
761 
 
762 
/* Return TRUE if a symbol exists at the given address.  */
763 
 
764 
static bfd_boolean
765 
msp430_elf_symbol_address_p (bfd * abfd,
766 
                             asection * sec,
767 
                             Elf_Internal_Sym * isym,
768 
                             bfd_vma addr)
769 
{
770 
  Elf_Internal_Shdr *symtab_hdr;
771 
  unsigned int sec_shndx;
772 
  Elf_Internal_Sym *isymend;
773 
  struct elf_link_hash_entry **sym_hashes;
774 
  struct elf_link_hash_entry **end_hashes;
775 
  unsigned int symcount;
776 
 
777 
  sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
778 
 
779 
  /* Examine all the local symbols.  */
780 
  symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
781 
  for (isymend = isym + symtab_hdr->sh_info; isym < isymend; isym++)
782 
    if (isym->st_shndx == sec_shndx && isym->st_value == addr)
783 
      return TRUE;
784 
 
785 
  symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym)
786 
              - symtab_hdr->sh_info);
787 
  sym_hashes = elf_sym_hashes (abfd);
788 
  end_hashes = sym_hashes + symcount;
789 
  for (; sym_hashes < end_hashes; sym_hashes++)
790 
    {
791 
      struct elf_link_hash_entry *sym_hash = *sym_hashes;
792 
 
793 
      if ((sym_hash->root.type == bfd_link_hash_defined
794 
           || sym_hash->root.type == bfd_link_hash_defweak)
795 
          && sym_hash->root.u.def.section == sec
796 
          && sym_hash->root.u.def.value == addr)
797 
        return TRUE;
798 
    }
799 
 
800 
  return FALSE;
801 
}
802 
 
803 
/* Adjust all local symbols defined as '.section + 0xXXXX' (.section has sec_shndx)
804 
    referenced from current and other sections */
805 
static bfd_boolean
806 
msp430_elf_relax_adjust_locals(bfd * abfd, asection * sec, bfd_vma addr,
807 
    int count, unsigned int sec_shndx, bfd_vma toaddr)
808 
{
809 
  Elf_Internal_Shdr *symtab_hdr;
810 
  Elf_Internal_Rela *irel;
811 
  Elf_Internal_Rela *irelend;
812 
  Elf_Internal_Sym *isym;
813 
 
814 
  irel = elf_section_data (sec)->relocs;
815 
  irelend = irel + sec->reloc_count;
816 
  symtab_hdr = & elf_tdata (abfd)->symtab_hdr;
817 
  isym = (Elf_Internal_Sym *) symtab_hdr->contents;
818 
 
819 
  for (irel = elf_section_data (sec)->relocs; irel < irelend; irel++)
820 
    {
821 
      int sidx = ELF32_R_SYM(irel->r_info);
822 
      Elf_Internal_Sym *lsym = isym + sidx;
823 
 
824 
      /* Adjust symbols referenced by .sec+0xXX */
825 
      if (irel->r_addend > addr && irel->r_addend < toaddr
826 
          && lsym->st_shndx == sec_shndx)
827 
        irel->r_addend -= count;
828 
    }
829 
 
830 
  return TRUE;
831 
}
832 
 
833 
/* Delete some bytes from a section while relaxing.  */
834 
 
835 
static bfd_boolean
836 
msp430_elf_relax_delete_bytes (bfd * abfd, asection * sec, bfd_vma addr,
837 
                               int count)
838 
{
839 
  Elf_Internal_Shdr *symtab_hdr;
840 
  unsigned int sec_shndx;
841 
  bfd_byte *contents;
842 
  Elf_Internal_Rela *irel;
843 
  Elf_Internal_Rela *irelend;
844 
  bfd_vma toaddr;
845 
  Elf_Internal_Sym *isym;
846 
  Elf_Internal_Sym *isymend;
847 
  struct elf_link_hash_entry **sym_hashes;
848 
  struct elf_link_hash_entry **end_hashes;
849 
  unsigned int symcount;
850 
  asection *p;
851 
 
852 
  sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
853 
 
854 
  contents = elf_section_data (sec)->this_hdr.contents;
855 
 
856 
  toaddr = sec->size;
857 
 
858 
  irel = elf_section_data (sec)->relocs;
859 
  irelend = irel + sec->reloc_count;
860 
 
861 
  /* Actually delete the bytes.  */
862 
  memmove (contents + addr, contents + addr + count,
863 
           (size_t) (toaddr - addr - count));
864 
  sec->size -= count;
865 
 
866 
  /* Adjust all the relocs.  */
867 
  symtab_hdr = & elf_tdata (abfd)->symtab_hdr;
868 
  isym = (Elf_Internal_Sym *) symtab_hdr->contents;
869 
  for (irel = elf_section_data (sec)->relocs; irel < irelend; irel++)
870 
    {
871 
      /* Get the new reloc address.  */
872 
      if ((irel->r_offset > addr && irel->r_offset < toaddr))
873 
        irel->r_offset -= count;
874 
    }
875 
 
876 
  for (p = abfd->sections; p != NULL; p = p->next)
877 
    msp430_elf_relax_adjust_locals(abfd,p,addr,count,sec_shndx,toaddr);
878 
 
879 
  /* Adjust the local symbols defined in this section.  */
880 
  symtab_hdr = & elf_tdata (abfd)->symtab_hdr;
881 
  isym = (Elf_Internal_Sym *) symtab_hdr->contents;
882 
  for (isymend = isym + symtab_hdr->sh_info; isym < isymend; isym++)
883 
    if (isym->st_shndx == sec_shndx
884 
        && isym->st_value > addr && isym->st_value < toaddr)
885 
      isym->st_value -= count;
886 
 
887 
  /* Now adjust the global symbols defined in this section.  */
888 
  symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym)
889 
              - symtab_hdr->sh_info);
890 
  sym_hashes = elf_sym_hashes (abfd);
891 
  end_hashes = sym_hashes + symcount;
892 
  for (; sym_hashes < end_hashes; sym_hashes++)
893 
    {
894 
      struct elf_link_hash_entry *sym_hash = *sym_hashes;
895 
 
896 
      if ((sym_hash->root.type == bfd_link_hash_defined
897 
           || sym_hash->root.type == bfd_link_hash_defweak)
898 
          && sym_hash->root.u.def.section == sec
899 
          && sym_hash->root.u.def.value > addr
900 
          && sym_hash->root.u.def.value < toaddr)
901 
        sym_hash->root.u.def.value -= count;
902 
    }
903 
 
904 
  return TRUE;
905 
}
906 
 
907 
 
908 
static bfd_boolean
909 
msp430_elf_relax_section (bfd * abfd, asection * sec,
910 
                          struct bfd_link_info * link_info,
911 
                          bfd_boolean * again)
912 
{
913 
  Elf_Internal_Shdr * symtab_hdr;
914 
  Elf_Internal_Rela * internal_relocs;
915 
  Elf_Internal_Rela * irel;
916 
  Elf_Internal_Rela * irelend;
917 
  bfd_byte *          contents = NULL;
918 
  Elf_Internal_Sym *  isymbuf = NULL;
919 
 
920 
  /* Assume nothing changes.  */
921 
  *again = FALSE;
922 
 
923 
  /* We don't have to do anything for a relocatable link, if
924 
     this section does not have relocs, or if this is not a
925 
     code section.  */
926 
  if (link_info->relocatable
927 
      || (sec->flags & SEC_RELOC) == 0
928 
      || sec->reloc_count == 0 || (sec->flags & SEC_CODE) == 0)
929 
    return TRUE;
930 
 
931 
  symtab_hdr = & elf_tdata (abfd)->symtab_hdr;
932 
 
933 
  /* Get a copy of the native relocations.  */
934 
  internal_relocs =
935 
    _bfd_elf_link_read_relocs (abfd, sec, NULL, NULL, link_info->keep_memory);
936 
  if (internal_relocs == NULL)
937 
    goto error_return;
938 
 
939 
  /* Walk through them looking for relaxing opportunities.  */
940 
  irelend = internal_relocs + sec->reloc_count;
941 
  for (irel = internal_relocs; irel < irelend; irel++)
942 
    {
943 
      bfd_vma symval;
944 
 
945 
      /* If this isn't something that can be relaxed, then ignore
946 
         this reloc.  */
947 
      if (ELF32_R_TYPE (irel->r_info) != (int) R_MSP430_RL_PCREL)
948 
        continue;
949 
 
950 
      /* Get the section contents if we haven't done so already.  */
951 
      if (contents == NULL)
952 
        {
953 
          /* Get cached copy if it exists.  */
954 
          if (elf_section_data (sec)->this_hdr.contents != NULL)
955 
            contents = elf_section_data (sec)->this_hdr.contents;
956 
          else if (! bfd_malloc_and_get_section (abfd, sec, &contents))
957 
            goto error_return;
958 
        }
959 
 
960 
      /* Read this BFD's local symbols if we haven't done so already.  */
961 
      if (isymbuf == NULL && symtab_hdr->sh_info != 0)
962 
        {
963 
          isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
964 
          if (isymbuf == NULL)
965 
            isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
966 
                                            symtab_hdr->sh_info, 0,
967 
                                            NULL, NULL, NULL);
968 
          if (isymbuf == NULL)
969 
            goto error_return;
970 
        }
971 
 
972 
      /* Get the value of the symbol referred to by the reloc.  */
973 
      if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
974 
        {
975 
          /* A local symbol.  */
976 
          Elf_Internal_Sym *isym;
977 
          asection *sym_sec;
978 
 
979 
          isym = isymbuf + ELF32_R_SYM (irel->r_info);
980 
          if (isym->st_shndx == SHN_UNDEF)
981 
            sym_sec = bfd_und_section_ptr;
982 
          else if (isym->st_shndx == SHN_ABS)
983 
            sym_sec = bfd_abs_section_ptr;
984 
          else if (isym->st_shndx == SHN_COMMON)
985 
            sym_sec = bfd_com_section_ptr;
986 
          else
987 
            sym_sec = bfd_section_from_elf_index (abfd, isym->st_shndx);
988 
          symval = (isym->st_value
989 
                    + sym_sec->output_section->vma + sym_sec->output_offset);
990 
        }
991 
      else
992 
        {
993 
          unsigned long indx;
994 
          struct elf_link_hash_entry *h;
995 
 
996 
          /* An external symbol.  */
997 
          indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
998 
          h = elf_sym_hashes (abfd)[indx];
999 
          BFD_ASSERT (h != NULL);
1000 
 
1001 
          if (h->root.type != bfd_link_hash_defined
1002 
              && h->root.type != bfd_link_hash_defweak)
1003 
            /* This appears to be a reference to an undefined
1004 
               symbol.  Just ignore it--it will be caught by the
1005 
               regular reloc processing.  */
1006 
            continue;
1007 
 
1008 
          symval = (h->root.u.def.value
1009 
                    + h->root.u.def.section->output_section->vma
1010 
                    + h->root.u.def.section->output_offset);
1011 
        }
1012 
 
1013 
      /* For simplicity of coding, we are going to modify the section
1014 
         contents, the section relocs, and the BFD symbol table.  We
1015 
         must tell the rest of the code not to free up this
1016 
         information.  It would be possible to instead create a table
1017 
         of changes which have to be made, as is done in coff-mips.c;
1018 
         that would be more work, but would require less memory when
1019 
         the linker is run.  */
1020 
 
1021 
      /* Try to turn a 16bit pc-relative branch into a 10bit pc-relative
1022 
         branch.  */
1023 
      /* Paranoia? paranoia...  */
1024 
      if (ELF32_R_TYPE (irel->r_info) == (int) R_MSP430_RL_PCREL)
1025 
        {
1026 
          bfd_vma value = symval;
1027 
 
1028 
          /* Deal with pc-relative gunk.  */
1029 
          value -= (sec->output_section->vma + sec->output_offset);
1030 
          value -= irel->r_offset;
1031 
          value += irel->r_addend;
1032 
 
1033 
          /* See if the value will fit in 10 bits, note the high value is
1034 
             1016 as the target will be two bytes closer if we are
1035 
             able to relax. */
1036 
          if ((long) value < 1016 && (long) value > -1016)
1037 
            {
1038 
              int code0 = 0, code1 = 0, code2 = 0;
1039 
              int i;
1040 
              struct rcodes_s *rx;
1041 
 
1042 
              /* Get the opcode.  */
1043 
              if (irel->r_offset >= 6)
1044 
                code0 = bfd_get_16 (abfd, contents + irel->r_offset - 6);
1045 
 
1046 
              if (irel->r_offset >= 4)
1047 
                code1 = bfd_get_16 (abfd, contents + irel->r_offset - 4);
1048 
 
1049 
              code2 = bfd_get_16 (abfd, contents + irel->r_offset - 2);
1050 
 
1051 
              if (code2 != 0x4010)
1052 
                continue;
1053 
 
1054 
              /* Check r4 and r3.  */
1055 
              for (i = NUMB_RELAX_CODES - 1; i >= 0; i--)
1056 
                {
1057 
                  rx = &rcode[i];
1058 
                  if (rx->cdx == 2 && rx->f0 == code0 && rx->f1 == code1)
1059 
                    break;
1060 
                  else if (rx->cdx == 1 && rx->f1 == code1)
1061 
                    break;
1062 
                  else if (rx->cdx == 0) /* This is an unconditional jump.  */
1063 
                    break;
1064 
                }
1065 
 
1066 
              /* Check labels:
1067 
                   .Label0:       ; we do not care about this label
1068 
                      jeq    +6
1069 
                   .Label1:       ; make sure there is no label here
1070 
                      jl     +4
1071 
                   .Label2:       ; make sure there is no label here
1072 
                      br .Label_dst
1073 
 
1074 
                 So, if there is .Label1 or .Label2 we cannot relax this code.
1075 
                 This actually should not happen, cause for relaxable
1076 
                 instructions we use RL_PCREL reloc instead of 16_PCREL.
1077 
                 Will change this in the future. */
1078 
 
1079 
              if (rx->cdx > 0
1080 
                  && msp430_elf_symbol_address_p (abfd, sec, isymbuf,
1081 
                                                  irel->r_offset - 2))
1082 
                continue;
1083 
              if (rx->cdx > 1
1084 
                  && msp430_elf_symbol_address_p (abfd, sec, isymbuf,
1085 
                                                  irel->r_offset - 4))
1086 
                continue;
1087 
 
1088 
              /* Note that we've changed the relocs, section contents, etc.  */
1089 
              elf_section_data (sec)->relocs = internal_relocs;
1090 
              elf_section_data (sec)->this_hdr.contents = contents;
1091 
              symtab_hdr->contents = (unsigned char *) isymbuf;
1092 
 
1093 
              /* Fix the relocation's type.  */
1094 
              if (rx->labels == 3)      /* Handle special cases.  */
1095 
                irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
1096 
                                           R_MSP430_2X_PCREL);
1097 
              else
1098 
                irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
1099 
                                           R_MSP430_10_PCREL);
1100 
 
1101 
              /* Fix the opcode right way.  */
1102 
              bfd_put_16 (abfd, rx->t0, contents + irel->r_offset - rx->off);
1103 
              if (rx->t1)
1104 
                bfd_put_16 (abfd, rx->t1,
1105 
                            contents + irel->r_offset - rx->off + 2);
1106 
 
1107 
              /* Delete bytes. */
1108 
              if (!msp430_elf_relax_delete_bytes (abfd, sec,
1109 
                                                  irel->r_offset - rx->off +
1110 
                                                  rx->ncl, rx->bs))
1111 
                goto error_return;
1112 
 
1113 
              /* Handle unconditional jumps.  */
1114 
              if (rx->cdx == 0)
1115 
                irel->r_offset -= 2;
1116 
 
1117 
              /* That will change things, so, we should relax again.
1118 
                 Note that this is not required, and it may be slow.  */
1119 
              *again = TRUE;
1120 
            }
1121 
        }
1122 
    }
1123 
 
1124 
  if (isymbuf != NULL && symtab_hdr->contents != (unsigned char *) isymbuf)
1125 
    {
1126 
      if (!link_info->keep_memory)
1127 
        free (isymbuf);
1128 
      else
1129 
        {
1130 
          /* Cache the symbols for elf_link_input_bfd.  */
1131 
          symtab_hdr->contents = (unsigned char *) isymbuf;
1132 
        }
1133 
    }
1134 
 
1135 
  if (contents != NULL
1136 
      && elf_section_data (sec)->this_hdr.contents != contents)
1137 
    {
1138 
      if (!link_info->keep_memory)
1139 
        free (contents);
1140 
      else
1141 
        {
1142 
          /* Cache the section contents for elf_link_input_bfd.  */
1143 
          elf_section_data (sec)->this_hdr.contents = contents;
1144 
        }
1145 
    }
1146 
 
1147 
  if (internal_relocs != NULL
1148 
      && elf_section_data (sec)->relocs != internal_relocs)
1149 
    free (internal_relocs);
1150 
 
1151 
  return TRUE;
1152 
 
1153 
error_return:
1154 
  if (isymbuf != NULL && symtab_hdr->contents != (unsigned char *) isymbuf)
1155 
    free (isymbuf);
1156 
  if (contents != NULL
1157 
      && elf_section_data (sec)->this_hdr.contents != contents)
1158 
    free (contents);
1159 
  if (internal_relocs != NULL
1160 
      && elf_section_data (sec)->relocs != internal_relocs)
1161 
    free (internal_relocs);
1162 
 
1163 
  return FALSE;
1164 
}
1165 
 
1166 
 
1167 
#define ELF_ARCH                bfd_arch_msp430
1168 
#define ELF_MACHINE_CODE        EM_MSP430
1169 
#define ELF_MACHINE_ALT1        EM_MSP430_OLD
1170 
#define ELF_MAXPAGESIZE         1
1171 
#define ELF_OSABI               ELFOSABI_STANDALONE
1172 
 
1173 
#define TARGET_LITTLE_SYM       bfd_elf32_msp430_vec
1174 
#define TARGET_LITTLE_NAME      "elf32-msp430"
1175 
 
1176 
#define elf_info_to_howto                    msp430_info_to_howto_rela
1177 
#define elf_info_to_howto_rel                NULL
1178 
#define elf_backend_relocate_section         elf32_msp430_relocate_section
1179 
#define elf_backend_check_relocs             elf32_msp430_check_relocs
1180 
#define elf_backend_can_gc_sections          1
1181 
#define elf_backend_final_write_processing   bfd_elf_msp430_final_write_processing
1182 
#define elf_backend_object_p                 elf32_msp430_object_p
1183 
#define elf_backend_post_process_headers     _bfd_elf_set_osabi
1184 
#define bfd_elf32_bfd_relax_section          msp430_elf_relax_section
1185 
 
1186 
#include "elf32-target.h"

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