OpenCores
URL https://opencores.org/ocsvn/openrisc_me/openrisc_me/trunk

Subversion Repositories openrisc_me

[/] [openrisc/] [trunk/] [gnu-src/] [gdb-6.8/] [bfd/] [coff-mips.c] - Blame information for rev 157

Go to most recent revision | Details | Compare with Previous | View Log

Line No. Rev Author Line
1 24 jeremybenn 
/* BFD back-end for MIPS Extended-Coff files.
2 
   Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
3 
   2000, 2001, 2002, 2003, 2004, 2007, 2008
4 
   Free Software Foundation, Inc.
5 
   Original version by Per Bothner.
6 
   Full support added by Ian Lance Taylor, ian@cygnus.com.
7 
 
8 
   This file is part of BFD, the Binary File Descriptor library.
9 
 
10 
   This program is free software; you can redistribute it and/or modify
11 
   it under the terms of the GNU General Public License as published by
12 
   the Free Software Foundation; either version 3 of the License, or
13 
   (at your option) any later version.
14 
 
15 
   This program is distributed in the hope that it will be useful,
16 
   but WITHOUT ANY WARRANTY; without even the implied warranty of
17 
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
18 
   GNU General Public License for more details.
19 
 
20 
   You should have received a copy of the GNU General Public License
21 
   along with this program; if not, write to the Free Software
22 
   Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
23 
   MA 02110-1301, USA.  */
24 
 
25 
#include "sysdep.h"
26 
#include "bfd.h"
27 
#include "bfdlink.h"
28 
#include "libbfd.h"
29 
#include "coff/internal.h"
30 
#include "coff/sym.h"
31 
#include "coff/symconst.h"
32 
#include "coff/ecoff.h"
33 
#include "coff/mips.h"
34 
#include "libcoff.h"
35 
#include "libecoff.h"
36 
 
37 
/* Prototypes for static functions.  */
38 
 
39 
static bfd_boolean mips_ecoff_bad_format_hook
40 
  PARAMS ((bfd *abfd, PTR filehdr));
41 
static void mips_ecoff_swap_reloc_in
42 
  PARAMS ((bfd *, PTR, struct internal_reloc *));
43 
static void mips_ecoff_swap_reloc_out
44 
  PARAMS ((bfd *, const struct internal_reloc *, PTR));
45 
static void mips_adjust_reloc_in
46 
  PARAMS ((bfd *, const struct internal_reloc *, arelent *));
47 
static void mips_adjust_reloc_out
48 
  PARAMS ((bfd *, const arelent *, struct internal_reloc *));
49 
static bfd_reloc_status_type mips_generic_reloc
50 
  PARAMS ((bfd *abfd, arelent *reloc, asymbol *symbol, PTR data,
51 
           asection *section, bfd *output_bfd, char **error));
52 
static bfd_reloc_status_type mips_refhi_reloc
53 
  PARAMS ((bfd *abfd, arelent *reloc, asymbol *symbol, PTR data,
54 
           asection *section, bfd *output_bfd, char **error));
55 
static bfd_reloc_status_type mips_reflo_reloc
56 
  PARAMS ((bfd *abfd, arelent *reloc, asymbol *symbol, PTR data,
57 
           asection *section, bfd *output_bfd, char **error));
58 
static bfd_reloc_status_type mips_gprel_reloc
59 
  PARAMS ((bfd *abfd, arelent *reloc, asymbol *symbol, PTR data,
60 
           asection *section, bfd *output_bfd, char **error));
61 
static void mips_relocate_hi
62 
  PARAMS ((struct internal_reloc *refhi, struct internal_reloc *reflo,
63 
           bfd *input_bfd, asection *input_section, bfd_byte *contents,
64 
           bfd_vma relocation));
65 
static bfd_boolean mips_relocate_section
66 
  PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, PTR));
67 
static reloc_howto_type *mips_bfd_reloc_type_lookup
68 
  PARAMS ((bfd *, bfd_reloc_code_real_type));
69 
 
70 
/* ECOFF has COFF sections, but the debugging information is stored in
71 
   a completely different format.  ECOFF targets use some of the
72 
   swapping routines from coffswap.h, and some of the generic COFF
73 
   routines in coffgen.c, but, unlike the real COFF targets, do not
74 
   use coffcode.h itself.
75 
 
76 
   Get the generic COFF swapping routines, except for the reloc,
77 
   symbol, and lineno ones.  Give them ECOFF names.  */
78 
#define MIPSECOFF
79 
#define NO_COFF_RELOCS
80 
#define NO_COFF_SYMBOLS
81 
#define NO_COFF_LINENOS
82 
#define coff_swap_filehdr_in mips_ecoff_swap_filehdr_in
83 
#define coff_swap_filehdr_out mips_ecoff_swap_filehdr_out
84 
#define coff_swap_aouthdr_in mips_ecoff_swap_aouthdr_in
85 
#define coff_swap_aouthdr_out mips_ecoff_swap_aouthdr_out
86 
#define coff_swap_scnhdr_in mips_ecoff_swap_scnhdr_in
87 
#define coff_swap_scnhdr_out mips_ecoff_swap_scnhdr_out
88 
#include "coffswap.h"
89 
 
90 
/* Get the ECOFF swapping routines.  */
91 
#define ECOFF_32
92 
#include "ecoffswap.h"
93 
 
94 
/* How to process the various relocs types.  */
95 
 
96 
static reloc_howto_type mips_howto_table[] =
97 
{
98 
  /* Reloc type 0 is ignored.  The reloc reading code ensures that
99 
     this is a reference to the .abs section, which will cause
100 
     bfd_perform_relocation to do nothing.  */
101 
  HOWTO (MIPS_R_IGNORE, /* type */
102 
         0,                      /* rightshift */
103 
         0,                      /* size (0 = byte, 1 = short, 2 = long) */
104 
         8,                     /* bitsize */
105 
         FALSE,                 /* pc_relative */
106 
         0,                      /* bitpos */
107 
         complain_overflow_dont, /* complain_on_overflow */
108 
         0,                      /* special_function */
109 
         "IGNORE",              /* name */
110 
         FALSE,                 /* partial_inplace */
111 
         0,                      /* src_mask */
112 
         0,                      /* dst_mask */
113 
         FALSE),                /* pcrel_offset */
114 
 
115 
  /* A 16 bit reference to a symbol, normally from a data section.  */
116 
  HOWTO (MIPS_R_REFHALF,        /* type */
117 
         0,                      /* rightshift */
118 
         1,                     /* size (0 = byte, 1 = short, 2 = long) */
119 
         16,                    /* bitsize */
120 
         FALSE,                 /* pc_relative */
121 
         0,                      /* bitpos */
122 
         complain_overflow_bitfield, /* complain_on_overflow */
123 
         mips_generic_reloc,    /* special_function */
124 
         "REFHALF",             /* name */
125 
         TRUE,                  /* partial_inplace */
126 
         0xffff,                /* src_mask */
127 
         0xffff,                /* dst_mask */
128 
         FALSE),                /* pcrel_offset */
129 
 
130 
  /* A 32 bit reference to a symbol, normally from a data section.  */
131 
  HOWTO (MIPS_R_REFWORD,        /* type */
132 
         0,                      /* rightshift */
133 
         2,                     /* size (0 = byte, 1 = short, 2 = long) */
134 
         32,                    /* bitsize */
135 
         FALSE,                 /* pc_relative */
136 
         0,                      /* bitpos */
137 
         complain_overflow_bitfield, /* complain_on_overflow */
138 
         mips_generic_reloc,    /* special_function */
139 
         "REFWORD",             /* name */
140 
         TRUE,                  /* partial_inplace */
141 
         0xffffffff,            /* src_mask */
142 
         0xffffffff,            /* dst_mask */
143 
         FALSE),                /* pcrel_offset */
144 
 
145 
  /* A 26 bit absolute jump address.  */
146 
  HOWTO (MIPS_R_JMPADDR,        /* type */
147 
         2,                     /* rightshift */
148 
         2,                     /* size (0 = byte, 1 = short, 2 = long) */
149 
         26,                    /* bitsize */
150 
         FALSE,                 /* pc_relative */
151 
         0,                      /* bitpos */
152 
         complain_overflow_dont, /* complain_on_overflow */
153 
                                /* This needs complex overflow
154 
                                   detection, because the upper four
155 
                                   bits must match the PC.  */
156 
         mips_generic_reloc,    /* special_function */
157 
         "JMPADDR",             /* name */
158 
         TRUE,                  /* partial_inplace */
159 
         0x3ffffff,             /* src_mask */
160 
         0x3ffffff,             /* dst_mask */
161 
         FALSE),                /* pcrel_offset */
162 
 
163 
  /* The high 16 bits of a symbol value.  Handled by the function
164 
     mips_refhi_reloc.  */
165 
  HOWTO (MIPS_R_REFHI,          /* type */
166 
         16,                    /* rightshift */
167 
         2,                     /* size (0 = byte, 1 = short, 2 = long) */
168 
         16,                    /* bitsize */
169 
         FALSE,                 /* pc_relative */
170 
         0,                      /* bitpos */
171 
         complain_overflow_bitfield, /* complain_on_overflow */
172 
         mips_refhi_reloc,      /* special_function */
173 
         "REFHI",               /* name */
174 
         TRUE,                  /* partial_inplace */
175 
         0xffff,                /* src_mask */
176 
         0xffff,                /* dst_mask */
177 
         FALSE),                /* pcrel_offset */
178 
 
179 
  /* The low 16 bits of a symbol value.  */
180 
  HOWTO (MIPS_R_REFLO,          /* type */
181 
         0,                      /* rightshift */
182 
         2,                     /* size (0 = byte, 1 = short, 2 = long) */
183 
         16,                    /* bitsize */
184 
         FALSE,                 /* pc_relative */
185 
         0,                      /* bitpos */
186 
         complain_overflow_dont, /* complain_on_overflow */
187 
         mips_reflo_reloc,      /* special_function */
188 
         "REFLO",               /* name */
189 
         TRUE,                  /* partial_inplace */
190 
         0xffff,                /* src_mask */
191 
         0xffff,                /* dst_mask */
192 
         FALSE),                /* pcrel_offset */
193 
 
194 
  /* A reference to an offset from the gp register.  Handled by the
195 
     function mips_gprel_reloc.  */
196 
  HOWTO (MIPS_R_GPREL,          /* type */
197 
         0,                      /* rightshift */
198 
         2,                     /* size (0 = byte, 1 = short, 2 = long) */
199 
         16,                    /* bitsize */
200 
         FALSE,                 /* pc_relative */
201 
         0,                      /* bitpos */
202 
         complain_overflow_signed, /* complain_on_overflow */
203 
         mips_gprel_reloc,      /* special_function */
204 
         "GPREL",               /* name */
205 
         TRUE,                  /* partial_inplace */
206 
         0xffff,                /* src_mask */
207 
         0xffff,                /* dst_mask */
208 
         FALSE),                /* pcrel_offset */
209 
 
210 
  /* A reference to a literal using an offset from the gp register.
211 
     Handled by the function mips_gprel_reloc.  */
212 
  HOWTO (MIPS_R_LITERAL,        /* type */
213 
         0,                      /* rightshift */
214 
         2,                     /* size (0 = byte, 1 = short, 2 = long) */
215 
         16,                    /* bitsize */
216 
         FALSE,                 /* pc_relative */
217 
         0,                      /* bitpos */
218 
         complain_overflow_signed, /* complain_on_overflow */
219 
         mips_gprel_reloc,      /* special_function */
220 
         "LITERAL",             /* name */
221 
         TRUE,                  /* partial_inplace */
222 
         0xffff,                /* src_mask */
223 
         0xffff,                /* dst_mask */
224 
         FALSE),                /* pcrel_offset */
225 
 
226 
  EMPTY_HOWTO (8),
227 
  EMPTY_HOWTO (9),
228 
  EMPTY_HOWTO (10),
229 
  EMPTY_HOWTO (11),
230 
 
231 
  /* FIXME: This relocation is used (internally only) to represent branches
232 
     when assembling.  It should never appear in output files, and
233 
     be removed.  (It used to be used for embedded-PIC support.)  */
234 
  HOWTO (MIPS_R_PCREL16,        /* type */
235 
         2,                     /* rightshift */
236 
         2,                     /* size (0 = byte, 1 = short, 2 = long) */
237 
         16,                    /* bitsize */
238 
         TRUE,                  /* pc_relative */
239 
         0,                      /* bitpos */
240 
         complain_overflow_signed, /* complain_on_overflow */
241 
         mips_generic_reloc,    /* special_function */
242 
         "PCREL16",             /* name */
243 
         TRUE,                  /* partial_inplace */
244 
         0xffff,                /* src_mask */
245 
         0xffff,                /* dst_mask */
246 
         TRUE),                 /* pcrel_offset */
247 
};
248 
 
249 
#define MIPS_HOWTO_COUNT \
250 
  (sizeof mips_howto_table / sizeof mips_howto_table[0])
251 
 
252 
/* See whether the magic number matches.  */
253 
 
254 
static bfd_boolean
255 
mips_ecoff_bad_format_hook (abfd, filehdr)
256 
     bfd *abfd;
257 
     PTR filehdr;
258 
{
259 
  struct internal_filehdr *internal_f = (struct internal_filehdr *) filehdr;
260 
 
261 
  switch (internal_f->f_magic)
262 
    {
263 
    case MIPS_MAGIC_1:
264 
      /* I don't know what endianness this implies.  */
265 
      return TRUE;
266 
 
267 
    case MIPS_MAGIC_BIG:
268 
    case MIPS_MAGIC_BIG2:
269 
    case MIPS_MAGIC_BIG3:
270 
      return bfd_big_endian (abfd);
271 
 
272 
    case MIPS_MAGIC_LITTLE:
273 
    case MIPS_MAGIC_LITTLE2:
274 
    case MIPS_MAGIC_LITTLE3:
275 
      return bfd_little_endian (abfd);
276 
 
277 
    default:
278 
      return FALSE;
279 
    }
280 
}
281 
 
282 
/* Reloc handling.  MIPS ECOFF relocs are packed into 8 bytes in
283 
   external form.  They use a bit which indicates whether the symbol
284 
   is external.  */
285 
 
286 
/* Swap a reloc in.  */
287 
 
288 
static void
289 
mips_ecoff_swap_reloc_in (abfd, ext_ptr, intern)
290 
     bfd *abfd;
291 
     PTR ext_ptr;
292 
     struct internal_reloc *intern;
293 
{
294 
  const RELOC *ext = (RELOC *) ext_ptr;
295 
 
296 
  intern->r_vaddr = H_GET_32 (abfd, ext->r_vaddr);
297 
  if (bfd_header_big_endian (abfd))
298 
    {
299 
      intern->r_symndx = (((int) ext->r_bits[0]
300 
                           << RELOC_BITS0_SYMNDX_SH_LEFT_BIG)
301 
                          | ((int) ext->r_bits[1]
302 
                             << RELOC_BITS1_SYMNDX_SH_LEFT_BIG)
303 
                          | ((int) ext->r_bits[2]
304 
                             << RELOC_BITS2_SYMNDX_SH_LEFT_BIG));
305 
      intern->r_type = ((ext->r_bits[3] & RELOC_BITS3_TYPE_BIG)
306 
                        >> RELOC_BITS3_TYPE_SH_BIG);
307 
      intern->r_extern = (ext->r_bits[3] & RELOC_BITS3_EXTERN_BIG) != 0;
308 
    }
309 
  else
310 
    {
311 
      intern->r_symndx = (((int) ext->r_bits[0]
312 
                           << RELOC_BITS0_SYMNDX_SH_LEFT_LITTLE)
313 
                          | ((int) ext->r_bits[1]
314 
                             << RELOC_BITS1_SYMNDX_SH_LEFT_LITTLE)
315 
                          | ((int) ext->r_bits[2]
316 
                             << RELOC_BITS2_SYMNDX_SH_LEFT_LITTLE));
317 
      intern->r_type = (((ext->r_bits[3] & RELOC_BITS3_TYPE_LITTLE)
318 
                         >> RELOC_BITS3_TYPE_SH_LITTLE)
319 
                        | ((ext->r_bits[3] & RELOC_BITS3_TYPEHI_LITTLE)
320 
                           << RELOC_BITS3_TYPEHI_SH_LITTLE));
321 
      intern->r_extern = (ext->r_bits[3] & RELOC_BITS3_EXTERN_LITTLE) != 0;
322 
    }
323 
}
324 
 
325 
/* Swap a reloc out.  */
326 
 
327 
static void
328 
mips_ecoff_swap_reloc_out (abfd, intern, dst)
329 
     bfd *abfd;
330 
     const struct internal_reloc *intern;
331 
     PTR dst;
332 
{
333 
  RELOC *ext = (RELOC *) dst;
334 
  long r_symndx;
335 
 
336 
  BFD_ASSERT (intern->r_extern
337 
              || (intern->r_symndx >= 0 && intern->r_symndx <= 12));
338 
 
339 
  r_symndx = intern->r_symndx;
340 
 
341 
  H_PUT_32 (abfd, intern->r_vaddr, ext->r_vaddr);
342 
  if (bfd_header_big_endian (abfd))
343 
    {
344 
      ext->r_bits[0] = r_symndx >> RELOC_BITS0_SYMNDX_SH_LEFT_BIG;
345 
      ext->r_bits[1] = r_symndx >> RELOC_BITS1_SYMNDX_SH_LEFT_BIG;
346 
      ext->r_bits[2] = r_symndx >> RELOC_BITS2_SYMNDX_SH_LEFT_BIG;
347 
      ext->r_bits[3] = (((intern->r_type << RELOC_BITS3_TYPE_SH_BIG)
348 
                         & RELOC_BITS3_TYPE_BIG)
349 
                        | (intern->r_extern ? RELOC_BITS3_EXTERN_BIG : 0));
350 
    }
351 
  else
352 
    {
353 
      ext->r_bits[0] = r_symndx >> RELOC_BITS0_SYMNDX_SH_LEFT_LITTLE;
354 
      ext->r_bits[1] = r_symndx >> RELOC_BITS1_SYMNDX_SH_LEFT_LITTLE;
355 
      ext->r_bits[2] = r_symndx >> RELOC_BITS2_SYMNDX_SH_LEFT_LITTLE;
356 
      ext->r_bits[3] = (((intern->r_type << RELOC_BITS3_TYPE_SH_LITTLE)
357 
                         & RELOC_BITS3_TYPE_LITTLE)
358 
                        | ((intern->r_type >> RELOC_BITS3_TYPEHI_SH_LITTLE
359 
                            & RELOC_BITS3_TYPEHI_LITTLE))
360 
                        | (intern->r_extern ? RELOC_BITS3_EXTERN_LITTLE : 0));
361 
    }
362 
}
363 
 
364 
/* Finish canonicalizing a reloc.  Part of this is generic to all
365 
   ECOFF targets, and that part is in ecoff.c.  The rest is done in
366 
   this backend routine.  It must fill in the howto field.  */
367 
 
368 
static void
369 
mips_adjust_reloc_in (abfd, intern, rptr)
370 
     bfd *abfd;
371 
     const struct internal_reloc *intern;
372 
     arelent *rptr;
373 
{
374 
  if (intern->r_type > MIPS_R_PCREL16)
375 
    abort ();
376 
 
377 
  if (! intern->r_extern
378 
      && (intern->r_type == MIPS_R_GPREL
379 
          || intern->r_type == MIPS_R_LITERAL))
380 
    rptr->addend += ecoff_data (abfd)->gp;
381 
 
382 
  /* If the type is MIPS_R_IGNORE, make sure this is a reference to
383 
     the absolute section so that the reloc is ignored.  */
384 
  if (intern->r_type == MIPS_R_IGNORE)
385 
    rptr->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr;
386 
 
387 
  rptr->howto = &mips_howto_table[intern->r_type];
388 
}
389 
 
390 
/* Make any adjustments needed to a reloc before writing it out.  None
391 
   are needed for MIPS.  */
392 
 
393 
static void
394 
mips_adjust_reloc_out (abfd, rel, intern)
395 
     bfd *abfd ATTRIBUTE_UNUSED;
396 
     const arelent *rel ATTRIBUTE_UNUSED;
397 
     struct internal_reloc *intern ATTRIBUTE_UNUSED;
398 
{
399 
}
400 
 
401 
/* ECOFF relocs are either against external symbols, or against
402 
   sections.  If we are producing relocatable output, and the reloc
403 
   is against an external symbol, and nothing has given us any
404 
   additional addend, the resulting reloc will also be against the
405 
   same symbol.  In such a case, we don't want to change anything
406 
   about the way the reloc is handled, since it will all be done at
407 
   final link time.  Rather than put special case code into
408 
   bfd_perform_relocation, all the reloc types use this howto
409 
   function.  It just short circuits the reloc if producing
410 
   relocatable output against an external symbol.  */
411 
 
412 
static bfd_reloc_status_type
413 
mips_generic_reloc (abfd,
414 
                    reloc_entry,
415 
                    symbol,
416 
                    data,
417 
                    input_section,
418 
                    output_bfd,
419 
                    error_message)
420 
     bfd *abfd ATTRIBUTE_UNUSED;
421 
     arelent *reloc_entry;
422 
     asymbol *symbol;
423 
     PTR data ATTRIBUTE_UNUSED;
424 
     asection *input_section;
425 
     bfd *output_bfd;
426 
     char **error_message ATTRIBUTE_UNUSED;
427 
{
428 
  if (output_bfd != (bfd *) NULL
429 
      && (symbol->flags & BSF_SECTION_SYM) == 0
430 
      && reloc_entry->addend == 0)
431 
    {
432 
      reloc_entry->address += input_section->output_offset;
433 
      return bfd_reloc_ok;
434 
    }
435 
 
436 
  return bfd_reloc_continue;
437 
}
438 
 
439 
/* Do a REFHI relocation.  This has to be done in combination with a
440 
   REFLO reloc, because there is a carry from the REFLO to the REFHI.
441 
   Here we just save the information we need; we do the actual
442 
   relocation when we see the REFLO.  MIPS ECOFF requires that the
443 
   REFLO immediately follow the REFHI.  As a GNU extension, we permit
444 
   an arbitrary number of HI relocs to be associated with a single LO
445 
   reloc.  This extension permits gcc to output the HI and LO relocs
446 
   itself.  */
447 
 
448 
struct mips_hi
449 
{
450 
  struct mips_hi *next;
451 
  bfd_byte *addr;
452 
  bfd_vma addend;
453 
};
454 
 
455 
/* FIXME: This should not be a static variable.  */
456 
 
457 
static struct mips_hi *mips_refhi_list;
458 
 
459 
static bfd_reloc_status_type
460 
mips_refhi_reloc (abfd,
461 
                  reloc_entry,
462 
                  symbol,
463 
                  data,
464 
                  input_section,
465 
                  output_bfd,
466 
                  error_message)
467 
     bfd *abfd ATTRIBUTE_UNUSED;
468 
     arelent *reloc_entry;
469 
     asymbol *symbol;
470 
     PTR data;
471 
     asection *input_section;
472 
     bfd *output_bfd;
473 
     char **error_message ATTRIBUTE_UNUSED;
474 
{
475 
  bfd_reloc_status_type ret;
476 
  bfd_vma relocation;
477 
  struct mips_hi *n;
478 
 
479 
  /* If we're relocating, and this an external symbol, we don't want
480 
     to change anything.  */
481 
  if (output_bfd != (bfd *) NULL
482 
      && (symbol->flags & BSF_SECTION_SYM) == 0
483 
      && reloc_entry->addend == 0)
484 
    {
485 
      reloc_entry->address += input_section->output_offset;
486 
      return bfd_reloc_ok;
487 
    }
488 
 
489 
  ret = bfd_reloc_ok;
490 
  if (bfd_is_und_section (symbol->section)
491 
      && output_bfd == (bfd *) NULL)
492 
    ret = bfd_reloc_undefined;
493 
 
494 
  if (bfd_is_com_section (symbol->section))
495 
    relocation = 0;
496 
  else
497 
    relocation = symbol->value;
498 
 
499 
  relocation += symbol->section->output_section->vma;
500 
  relocation += symbol->section->output_offset;
501 
  relocation += reloc_entry->addend;
502 
 
503 
  if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
504 
    return bfd_reloc_outofrange;
505 
 
506 
  /* Save the information, and let REFLO do the actual relocation.  */
507 
  n = (struct mips_hi *) bfd_malloc ((bfd_size_type) sizeof *n);
508 
  if (n == NULL)
509 
    return bfd_reloc_outofrange;
510 
  n->addr = (bfd_byte *) data + reloc_entry->address;
511 
  n->addend = relocation;
512 
  n->next = mips_refhi_list;
513 
  mips_refhi_list = n;
514 
 
515 
  if (output_bfd != (bfd *) NULL)
516 
    reloc_entry->address += input_section->output_offset;
517 
 
518 
  return ret;
519 
}
520 
 
521 
/* Do a REFLO relocation.  This is a straightforward 16 bit inplace
522 
   relocation; this function exists in order to do the REFHI
523 
   relocation described above.  */
524 
 
525 
static bfd_reloc_status_type
526 
mips_reflo_reloc (abfd,
527 
                  reloc_entry,
528 
                  symbol,
529 
                  data,
530 
                  input_section,
531 
                  output_bfd,
532 
                  error_message)
533 
     bfd *abfd;
534 
     arelent *reloc_entry;
535 
     asymbol *symbol;
536 
     PTR data;
537 
     asection *input_section;
538 
     bfd *output_bfd;
539 
     char **error_message;
540 
{
541 
  if (mips_refhi_list != NULL)
542 
    {
543 
      struct mips_hi *l;
544 
 
545 
      l = mips_refhi_list;
546 
      while (l != NULL)
547 
        {
548 
          unsigned long insn;
549 
          unsigned long val;
550 
          unsigned long vallo;
551 
          struct mips_hi *next;
552 
 
553 
          /* Do the REFHI relocation.  Note that we actually don't
554 
             need to know anything about the REFLO itself, except
555 
             where to find the low 16 bits of the addend needed by the
556 
             REFHI.  */
557 
          insn = bfd_get_32 (abfd, l->addr);
558 
          vallo = (bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address)
559 
                   & 0xffff);
560 
          val = ((insn & 0xffff) << 16) + vallo;
561 
          val += l->addend;
562 
 
563 
          /* The low order 16 bits are always treated as a signed
564 
             value.  Therefore, a negative value in the low order bits
565 
             requires an adjustment in the high order bits.  We need
566 
             to make this adjustment in two ways: once for the bits we
567 
             took from the data, and once for the bits we are putting
568 
             back in to the data.  */
569 
          if ((vallo & 0x8000) != 0)
570 
            val -= 0x10000;
571 
          if ((val & 0x8000) != 0)
572 
            val += 0x10000;
573 
 
574 
          insn = (insn &~ (unsigned) 0xffff) | ((val >> 16) & 0xffff);
575 
          bfd_put_32 (abfd, (bfd_vma) insn, l->addr);
576 
 
577 
          next = l->next;
578 
          free (l);
579 
          l = next;
580 
        }
581 
 
582 
      mips_refhi_list = NULL;
583 
    }
584 
 
585 
  /* Now do the REFLO reloc in the usual way.  */
586 
  return mips_generic_reloc (abfd, reloc_entry, symbol, data,
587 
                              input_section, output_bfd, error_message);
588 
}
589 
 
590 
/* Do a GPREL relocation.  This is a 16 bit value which must become
591 
   the offset from the gp register.  */
592 
 
593 
static bfd_reloc_status_type
594 
mips_gprel_reloc (abfd,
595 
                  reloc_entry,
596 
                  symbol,
597 
                  data,
598 
                  input_section,
599 
                  output_bfd,
600 
                  error_message)
601 
     bfd *abfd;
602 
     arelent *reloc_entry;
603 
     asymbol *symbol;
604 
     PTR data;
605 
     asection *input_section;
606 
     bfd *output_bfd;
607 
     char **error_message;
608 
{
609 
  bfd_boolean relocatable;
610 
  bfd_vma gp;
611 
  bfd_vma relocation;
612 
  unsigned long val;
613 
  unsigned long insn;
614 
 
615 
  /* If we're relocating, and this is an external symbol with no
616 
     addend, we don't want to change anything.  We will only have an
617 
     addend if this is a newly created reloc, not read from an ECOFF
618 
     file.  */
619 
  if (output_bfd != (bfd *) NULL
620 
      && (symbol->flags & BSF_SECTION_SYM) == 0
621 
      && reloc_entry->addend == 0)
622 
    {
623 
      reloc_entry->address += input_section->output_offset;
624 
      return bfd_reloc_ok;
625 
    }
626 
 
627 
  if (output_bfd != (bfd *) NULL)
628 
    relocatable = TRUE;
629 
  else
630 
    {
631 
      relocatable = FALSE;
632 
      output_bfd = symbol->section->output_section->owner;
633 
    }
634 
 
635 
  if (bfd_is_und_section (symbol->section) && ! relocatable)
636 
    return bfd_reloc_undefined;
637 
 
638 
  /* We have to figure out the gp value, so that we can adjust the
639 
     symbol value correctly.  We look up the symbol _gp in the output
640 
     BFD.  If we can't find it, we're stuck.  We cache it in the ECOFF
641 
     target data.  We don't need to adjust the symbol value for an
642 
     external symbol if we are producing relocatable output.  */
643 
  gp = _bfd_get_gp_value (output_bfd);
644 
  if (gp == 0
645 
      && (! relocatable
646 
          || (symbol->flags & BSF_SECTION_SYM) != 0))
647 
    {
648 
      if (relocatable)
649 
        {
650 
          /* Make up a value.  */
651 
          gp = symbol->section->output_section->vma + 0x4000;
652 
          _bfd_set_gp_value (output_bfd, gp);
653 
        }
654 
      else
655 
        {
656 
          unsigned int count;
657 
          asymbol **sym;
658 
          unsigned int i;
659 
 
660 
          count = bfd_get_symcount (output_bfd);
661 
          sym = bfd_get_outsymbols (output_bfd);
662 
 
663 
          if (sym == (asymbol **) NULL)
664 
            i = count;
665 
          else
666 
            {
667 
              for (i = 0; i < count; i++, sym++)
668 
                {
669 
                  register const char *name;
670 
 
671 
                  name = bfd_asymbol_name (*sym);
672 
                  if (*name == '_' && strcmp (name, "_gp") == 0)
673 
                    {
674 
                      gp = bfd_asymbol_value (*sym);
675 
                      _bfd_set_gp_value (output_bfd, gp);
676 
                      break;
677 
                    }
678 
                }
679 
            }
680 
 
681 
          if (i >= count)
682 
            {
683 
              /* Only get the error once.  */
684 
              gp = 4;
685 
              _bfd_set_gp_value (output_bfd, gp);
686 
              *error_message =
687 
                (char *) _("GP relative relocation when _gp not defined");
688 
              return bfd_reloc_dangerous;
689 
            }
690 
        }
691 
    }
692 
 
693 
  if (bfd_is_com_section (symbol->section))
694 
    relocation = 0;
695 
  else
696 
    relocation = symbol->value;
697 
 
698 
  relocation += symbol->section->output_section->vma;
699 
  relocation += symbol->section->output_offset;
700 
 
701 
  if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
702 
    return bfd_reloc_outofrange;
703 
 
704 
  insn = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address);
705 
 
706 
  /* Set val to the offset into the section or symbol.  */
707 
  val = ((insn & 0xffff) + reloc_entry->addend) & 0xffff;
708 
  if (val & 0x8000)
709 
    val -= 0x10000;
710 
 
711 
  /* Adjust val for the final section location and GP value.  If we
712 
     are producing relocatable output, we don't want to do this for
713 
     an external symbol.  */
714 
  if (! relocatable
715 
      || (symbol->flags & BSF_SECTION_SYM) != 0)
716 
    val += relocation - gp;
717 
 
718 
  insn = (insn &~ (unsigned) 0xffff) | (val & 0xffff);
719 
  bfd_put_32 (abfd, (bfd_vma) insn, (bfd_byte *) data + reloc_entry->address);
720 
 
721 
  if (relocatable)
722 
    reloc_entry->address += input_section->output_offset;
723 
 
724 
  /* Make sure it fit in 16 bits.  */
725 
  if ((long) val >= 0x8000 || (long) val < -0x8000)
726 
    return bfd_reloc_overflow;
727 
 
728 
  return bfd_reloc_ok;
729 
}
730 
 
731 
/* Get the howto structure for a generic reloc type.  */
732 
 
733 
static reloc_howto_type *
734 
mips_bfd_reloc_type_lookup (abfd, code)
735 
     bfd *abfd ATTRIBUTE_UNUSED;
736 
     bfd_reloc_code_real_type code;
737 
{
738 
  int mips_type;
739 
 
740 
  switch (code)
741 
    {
742 
    case BFD_RELOC_16:
743 
      mips_type = MIPS_R_REFHALF;
744 
      break;
745 
    case BFD_RELOC_32:
746 
    case BFD_RELOC_CTOR:
747 
      mips_type = MIPS_R_REFWORD;
748 
      break;
749 
    case BFD_RELOC_MIPS_JMP:
750 
      mips_type = MIPS_R_JMPADDR;
751 
      break;
752 
    case BFD_RELOC_HI16_S:
753 
      mips_type = MIPS_R_REFHI;
754 
      break;
755 
    case BFD_RELOC_LO16:
756 
      mips_type = MIPS_R_REFLO;
757 
      break;
758 
    case BFD_RELOC_GPREL16:
759 
      mips_type = MIPS_R_GPREL;
760 
      break;
761 
    case BFD_RELOC_MIPS_LITERAL:
762 
      mips_type = MIPS_R_LITERAL;
763 
      break;
764 
    case BFD_RELOC_16_PCREL_S2:
765 
      mips_type = MIPS_R_PCREL16;
766 
      break;
767 
    default:
768 
      return (reloc_howto_type *) NULL;
769 
    }
770 
 
771 
  return &mips_howto_table[mips_type];
772 
}
773 
 
774 
static reloc_howto_type *
775 
mips_bfd_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
776 
                            const char *r_name)
777 
{
778 
  unsigned int i;
779 
 
780 
  for (i = 0;
781 
       i < sizeof (mips_howto_table) / sizeof (mips_howto_table[0]);
782 
       i++)
783 
    if (mips_howto_table[i].name != NULL
784 
        && strcasecmp (mips_howto_table[i].name, r_name) == 0)
785 
      return &mips_howto_table[i];
786 
 
787 
  return NULL;
788 
}
789 
 
790 
/* A helper routine for mips_relocate_section which handles the REFHI
791 
   relocations.  The REFHI relocation must be followed by a REFLO
792 
   relocation, and the addend used is formed from the addends of both
793 
   instructions.  */
794 
 
795 
static void
796 
mips_relocate_hi (refhi, reflo, input_bfd, input_section, contents,
797 
                  relocation)
798 
     struct internal_reloc *refhi;
799 
     struct internal_reloc *reflo;
800 
     bfd *input_bfd;
801 
     asection *input_section;
802 
     bfd_byte *contents;
803 
     bfd_vma relocation;
804 
{
805 
  unsigned long insn;
806 
  unsigned long val;
807 
  unsigned long vallo;
808 
 
809 
  if (refhi == NULL)
810 
    return;
811 
 
812 
  insn = bfd_get_32 (input_bfd,
813 
                     contents + refhi->r_vaddr - input_section->vma);
814 
  if (reflo == NULL)
815 
    vallo = 0;
816 
  else
817 
    vallo = (bfd_get_32 (input_bfd,
818 
                         contents + reflo->r_vaddr - input_section->vma)
819 
             & 0xffff);
820 
 
821 
  val = ((insn & 0xffff) << 16) + vallo;
822 
  val += relocation;
823 
 
824 
  /* The low order 16 bits are always treated as a signed value.
825 
     Therefore, a negative value in the low order bits requires an
826 
     adjustment in the high order bits.  We need to make this
827 
     adjustment in two ways: once for the bits we took from the data,
828 
     and once for the bits we are putting back in to the data.  */
829 
  if ((vallo & 0x8000) != 0)
830 
    val -= 0x10000;
831 
 
832 
  if ((val & 0x8000) != 0)
833 
    val += 0x10000;
834 
 
835 
  insn = (insn &~ (unsigned) 0xffff) | ((val >> 16) & 0xffff);
836 
  bfd_put_32 (input_bfd, (bfd_vma) insn,
837 
              contents + refhi->r_vaddr - input_section->vma);
838 
}
839 
 
840 
/* Relocate a section while linking a MIPS ECOFF file.  */
841 
 
842 
static bfd_boolean
843 
mips_relocate_section (output_bfd, info, input_bfd, input_section,
844 
                       contents, external_relocs)
845 
     bfd *output_bfd;
846 
     struct bfd_link_info *info;
847 
     bfd *input_bfd;
848 
     asection *input_section;
849 
     bfd_byte *contents;
850 
     PTR external_relocs;
851 
{
852 
  asection **symndx_to_section;
853 
  struct ecoff_link_hash_entry **sym_hashes;
854 
  bfd_vma gp;
855 
  bfd_boolean gp_undefined;
856 
  struct external_reloc *ext_rel;
857 
  struct external_reloc *ext_rel_end;
858 
  unsigned int i;
859 
  bfd_boolean got_lo;
860 
  struct internal_reloc lo_int_rel;
861 
  bfd_size_type amt;
862 
 
863 
  BFD_ASSERT (input_bfd->xvec->byteorder
864 
              == output_bfd->xvec->byteorder);
865 
 
866 
  /* We keep a table mapping the symndx found in an internal reloc to
867 
     the appropriate section.  This is faster than looking up the
868 
     section by name each time.  */
869 
  symndx_to_section = ecoff_data (input_bfd)->symndx_to_section;
870 
  if (symndx_to_section == (asection **) NULL)
871 
    {
872 
      amt = NUM_RELOC_SECTIONS * sizeof (asection *);
873 
      symndx_to_section = (asection **) bfd_alloc (input_bfd, amt);
874 
      if (!symndx_to_section)
875 
        return FALSE;
876 
 
877 
      symndx_to_section[RELOC_SECTION_NONE] = NULL;
878 
      symndx_to_section[RELOC_SECTION_TEXT] =
879 
        bfd_get_section_by_name (input_bfd, ".text");
880 
      symndx_to_section[RELOC_SECTION_RDATA] =
881 
        bfd_get_section_by_name (input_bfd, ".rdata");
882 
      symndx_to_section[RELOC_SECTION_DATA] =
883 
        bfd_get_section_by_name (input_bfd, ".data");
884 
      symndx_to_section[RELOC_SECTION_SDATA] =
885 
        bfd_get_section_by_name (input_bfd, ".sdata");
886 
      symndx_to_section[RELOC_SECTION_SBSS] =
887 
        bfd_get_section_by_name (input_bfd, ".sbss");
888 
      symndx_to_section[RELOC_SECTION_BSS] =
889 
        bfd_get_section_by_name (input_bfd, ".bss");
890 
      symndx_to_section[RELOC_SECTION_INIT] =
891 
        bfd_get_section_by_name (input_bfd, ".init");
892 
      symndx_to_section[RELOC_SECTION_LIT8] =
893 
        bfd_get_section_by_name (input_bfd, ".lit8");
894 
      symndx_to_section[RELOC_SECTION_LIT4] =
895 
        bfd_get_section_by_name (input_bfd, ".lit4");
896 
      symndx_to_section[RELOC_SECTION_XDATA] = NULL;
897 
      symndx_to_section[RELOC_SECTION_PDATA] = NULL;
898 
      symndx_to_section[RELOC_SECTION_FINI] =
899 
        bfd_get_section_by_name (input_bfd, ".fini");
900 
      symndx_to_section[RELOC_SECTION_LITA] = NULL;
901 
      symndx_to_section[RELOC_SECTION_ABS] = NULL;
902 
 
903 
      ecoff_data (input_bfd)->symndx_to_section = symndx_to_section;
904 
    }
905 
 
906 
  sym_hashes = ecoff_data (input_bfd)->sym_hashes;
907 
 
908 
  gp = _bfd_get_gp_value (output_bfd);
909 
  if (gp == 0)
910 
    gp_undefined = TRUE;
911 
  else
912 
    gp_undefined = FALSE;
913 
 
914 
  got_lo = FALSE;
915 
 
916 
  ext_rel = (struct external_reloc *) external_relocs;
917 
  ext_rel_end = ext_rel + input_section->reloc_count;
918 
  for (i = 0; ext_rel < ext_rel_end; ext_rel++, i++)
919 
    {
920 
      struct internal_reloc int_rel;
921 
      bfd_boolean use_lo = FALSE;
922 
      bfd_vma addend;
923 
      reloc_howto_type *howto;
924 
      struct ecoff_link_hash_entry *h = NULL;
925 
      asection *s = NULL;
926 
      bfd_vma relocation;
927 
      bfd_reloc_status_type r;
928 
 
929 
      if (! got_lo)
930 
        mips_ecoff_swap_reloc_in (input_bfd, (PTR) ext_rel, &int_rel);
931 
      else
932 
        {
933 
          int_rel = lo_int_rel;
934 
          got_lo = FALSE;
935 
        }
936 
 
937 
      BFD_ASSERT (int_rel.r_type
938 
                  < sizeof mips_howto_table / sizeof mips_howto_table[0]);
939 
 
940 
      /* The REFHI reloc requires special handling.  It must be followed
941 
         by a REFLO reloc, and the addend is formed from both relocs.  */
942 
      if (int_rel.r_type == MIPS_R_REFHI)
943 
        {
944 
          struct external_reloc *lo_ext_rel;
945 
 
946 
          /* As a GNU extension, permit an arbitrary number of REFHI
947 
             relocs before the REFLO reloc.  This permits gcc to emit
948 
             the HI and LO relocs itself.  */
949 
          for (lo_ext_rel = ext_rel + 1;
950 
               lo_ext_rel < ext_rel_end;
951 
               lo_ext_rel++)
952 
            {
953 
              mips_ecoff_swap_reloc_in (input_bfd, (PTR) lo_ext_rel,
954 
                                        &lo_int_rel);
955 
              if (lo_int_rel.r_type != int_rel.r_type)
956 
                break;
957 
            }
958 
 
959 
          if (lo_ext_rel < ext_rel_end
960 
              && lo_int_rel.r_type == MIPS_R_REFLO
961 
              && int_rel.r_extern == lo_int_rel.r_extern
962 
              && int_rel.r_symndx == lo_int_rel.r_symndx)
963 
            {
964 
              use_lo = TRUE;
965 
              if (lo_ext_rel == ext_rel + 1)
966 
                got_lo = TRUE;
967 
            }
968 
        }
969 
 
970 
      howto = &mips_howto_table[int_rel.r_type];
971 
 
972 
      if (int_rel.r_extern)
973 
        {
974 
          h = sym_hashes[int_rel.r_symndx];
975 
          /* If h is NULL, that means that there is a reloc against an
976 
             external symbol which we thought was just a debugging
977 
             symbol.  This should not happen.  */
978 
          if (h == (struct ecoff_link_hash_entry *) NULL)
979 
            abort ();
980 
        }
981 
      else
982 
        {
983 
          if (int_rel.r_symndx < 0 || int_rel.r_symndx >= NUM_RELOC_SECTIONS)
984 
            s = NULL;
985 
          else
986 
            s = symndx_to_section[int_rel.r_symndx];
987 
 
988 
          if (s == (asection *) NULL)
989 
            abort ();
990 
        }
991 
 
992 
      /* The GPREL reloc uses an addend: the difference in the GP
993 
         values.  */
994 
      if (int_rel.r_type != MIPS_R_GPREL
995 
          && int_rel.r_type != MIPS_R_LITERAL)
996 
        addend = 0;
997 
      else
998 
        {
999 
          if (gp_undefined)
1000 
            {
1001 
              if (! ((*info->callbacks->reloc_dangerous)
1002 
                     (info, _("GP relative relocation used when GP not defined"),
1003 
                      input_bfd, input_section,
1004 
                      int_rel.r_vaddr - input_section->vma)))
1005 
                return FALSE;
1006 
              /* Only give the error once per link.  */
1007 
              gp = 4;
1008 
              _bfd_set_gp_value (output_bfd, gp);
1009 
              gp_undefined = FALSE;
1010 
            }
1011 
          if (! int_rel.r_extern)
1012 
            {
1013 
              /* This is a relocation against a section.  The current
1014 
                 addend in the instruction is the difference between
1015 
                 INPUT_SECTION->vma and the GP value of INPUT_BFD.  We
1016 
                 must change this to be the difference between the
1017 
                 final definition (which will end up in RELOCATION)
1018 
                 and the GP value of OUTPUT_BFD (which is in GP).  */
1019 
              addend = ecoff_data (input_bfd)->gp - gp;
1020 
            }
1021 
          else if (! info->relocatable
1022 
                   || h->root.type == bfd_link_hash_defined
1023 
                   || h->root.type == bfd_link_hash_defweak)
1024 
            {
1025 
              /* This is a relocation against a defined symbol.  The
1026 
                 current addend in the instruction is simply the
1027 
                 desired offset into the symbol (normally zero).  We
1028 
                 are going to change this into a relocation against a
1029 
                 defined symbol, so we want the instruction to hold
1030 
                 the difference between the final definition of the
1031 
                 symbol (which will end up in RELOCATION) and the GP
1032 
                 value of OUTPUT_BFD (which is in GP).  */
1033 
              addend = - gp;
1034 
            }
1035 
          else
1036 
            {
1037 
              /* This is a relocation against an undefined or common
1038 
                 symbol.  The current addend in the instruction is
1039 
                 simply the desired offset into the symbol (normally
1040 
                 zero).  We are generating relocatable output, and we
1041 
                 aren't going to define this symbol, so we just leave
1042 
                 the instruction alone.  */
1043 
              addend = 0;
1044 
            }
1045 
        }
1046 
 
1047 
      if (info->relocatable)
1048 
        {
1049 
          /* We are generating relocatable output, and must convert
1050 
             the existing reloc.  */
1051 
          if (int_rel.r_extern)
1052 
            {
1053 
              if ((h->root.type == bfd_link_hash_defined
1054 
                   || h->root.type == bfd_link_hash_defweak)
1055 
                  && ! bfd_is_abs_section (h->root.u.def.section))
1056 
                {
1057 
                  const char *name;
1058 
 
1059 
                  /* This symbol is defined in the output.  Convert
1060 
                     the reloc from being against the symbol to being
1061 
                     against the section.  */
1062 
 
1063 
                  /* Clear the r_extern bit.  */
1064 
                  int_rel.r_extern = 0;
1065 
 
1066 
                  /* Compute a new r_symndx value.  */
1067 
                  s = h->root.u.def.section;
1068 
                  name = bfd_get_section_name (output_bfd,
1069 
                                               s->output_section);
1070 
 
1071 
                  int_rel.r_symndx = -1;
1072 
                  switch (name[1])
1073 
                    {
1074 
                    case 'b':
1075 
                      if (strcmp (name, ".bss") == 0)
1076 
                        int_rel.r_symndx = RELOC_SECTION_BSS;
1077 
                      break;
1078 
                    case 'd':
1079 
                      if (strcmp (name, ".data") == 0)
1080 
                        int_rel.r_symndx = RELOC_SECTION_DATA;
1081 
                      break;
1082 
                    case 'f':
1083 
                      if (strcmp (name, ".fini") == 0)
1084 
                        int_rel.r_symndx = RELOC_SECTION_FINI;
1085 
                      break;
1086 
                    case 'i':
1087 
                      if (strcmp (name, ".init") == 0)
1088 
                        int_rel.r_symndx = RELOC_SECTION_INIT;
1089 
                      break;
1090 
                    case 'l':
1091 
                      if (strcmp (name, ".lit8") == 0)
1092 
                        int_rel.r_symndx = RELOC_SECTION_LIT8;
1093 
                      else if (strcmp (name, ".lit4") == 0)
1094 
                        int_rel.r_symndx = RELOC_SECTION_LIT4;
1095 
                      break;
1096 
                    case 'r':
1097 
                      if (strcmp (name, ".rdata") == 0)
1098 
                        int_rel.r_symndx = RELOC_SECTION_RDATA;
1099 
                      break;
1100 
                    case 's':
1101 
                      if (strcmp (name, ".sdata") == 0)
1102 
                        int_rel.r_symndx = RELOC_SECTION_SDATA;
1103 
                      else if (strcmp (name, ".sbss") == 0)
1104 
                        int_rel.r_symndx = RELOC_SECTION_SBSS;
1105 
                      break;
1106 
                    case 't':
1107 
                      if (strcmp (name, ".text") == 0)
1108 
                        int_rel.r_symndx = RELOC_SECTION_TEXT;
1109 
                      break;
1110 
                    }
1111 
 
1112 
                  if (int_rel.r_symndx == -1)
1113 
                    abort ();
1114 
 
1115 
                  /* Add the section VMA and the symbol value.  */
1116 
                  relocation = (h->root.u.def.value
1117 
                                + s->output_section->vma
1118 
                                + s->output_offset);
1119 
 
1120 
                  /* For a PC relative relocation, the object file
1121 
                     currently holds just the addend.  We must adjust
1122 
                     by the address to get the right value.  */
1123 
                  if (howto->pc_relative)
1124 
                    relocation -= int_rel.r_vaddr - input_section->vma;
1125 
 
1126 
                  h = NULL;
1127 
                }
1128 
              else
1129 
                {
1130 
                  /* Change the symndx value to the right one for the
1131 
                     output BFD.  */
1132 
                  int_rel.r_symndx = h->indx;
1133 
                  if (int_rel.r_symndx == -1)
1134 
                    {
1135 
                      /* This symbol is not being written out.  */
1136 
                      if (! ((*info->callbacks->unattached_reloc)
1137 
                             (info, h->root.root.string, input_bfd,
1138 
                              input_section,
1139 
                              int_rel.r_vaddr - input_section->vma)))
1140 
                        return FALSE;
1141 
                      int_rel.r_symndx = 0;
1142 
                    }
1143 
                  relocation = 0;
1144 
                }
1145 
            }
1146 
          else
1147 
            {
1148 
              /* This is a relocation against a section.  Adjust the
1149 
                 value by the amount the section moved.  */
1150 
              relocation = (s->output_section->vma
1151 
                            + s->output_offset
1152 
                            - s->vma);
1153 
            }
1154 
 
1155 
          relocation += addend;
1156 
          addend = 0;
1157 
 
1158 
          /* Adjust a PC relative relocation by removing the reference
1159 
             to the original address in the section and including the
1160 
             reference to the new address.  */
1161 
          if (howto->pc_relative)
1162 
            relocation -= (input_section->output_section->vma
1163 
                           + input_section->output_offset
1164 
                           - input_section->vma);
1165 
 
1166 
          /* Adjust the contents.  */
1167 
          if (relocation == 0)
1168 
            r = bfd_reloc_ok;
1169 
          else
1170 
            {
1171 
              if (int_rel.r_type != MIPS_R_REFHI)
1172 
                r = _bfd_relocate_contents (howto, input_bfd, relocation,
1173 
                                            (contents
1174 
                                             + int_rel.r_vaddr
1175 
                                             - input_section->vma));
1176 
              else
1177 
                {
1178 
                  mips_relocate_hi (&int_rel,
1179 
                                    use_lo ? &lo_int_rel : NULL,
1180 
                                    input_bfd, input_section, contents,
1181 
                                    relocation);
1182 
                  r = bfd_reloc_ok;
1183 
                }
1184 
            }
1185 
 
1186 
          /* Adjust the reloc address.  */
1187 
          int_rel.r_vaddr += (input_section->output_section->vma
1188 
                              + input_section->output_offset
1189 
                              - input_section->vma);
1190 
 
1191 
          /* Save the changed reloc information.  */
1192 
          mips_ecoff_swap_reloc_out (input_bfd, &int_rel, (PTR) ext_rel);
1193 
        }
1194 
      else
1195 
        {
1196 
          /* We are producing a final executable.  */
1197 
          if (int_rel.r_extern)
1198 
            {
1199 
              /* This is a reloc against a symbol.  */
1200 
              if (h->root.type == bfd_link_hash_defined
1201 
                  || h->root.type == bfd_link_hash_defweak)
1202 
                {
1203 
                  asection *hsec;
1204 
 
1205 
                  hsec = h->root.u.def.section;
1206 
                  relocation = (h->root.u.def.value
1207 
                                + hsec->output_section->vma
1208 
                                + hsec->output_offset);
1209 
                }
1210 
              else
1211 
                {
1212 
                  if (! ((*info->callbacks->undefined_symbol)
1213 
                         (info, h->root.root.string, input_bfd,
1214 
                          input_section,
1215 
                          int_rel.r_vaddr - input_section->vma, TRUE)))
1216 
                    return FALSE;
1217 
                  relocation = 0;
1218 
                }
1219 
            }
1220 
          else
1221 
            {
1222 
              /* This is a reloc against a section.  */
1223 
              relocation = (s->output_section->vma
1224 
                            + s->output_offset
1225 
                            - s->vma);
1226 
 
1227 
              /* A PC relative reloc is already correct in the object
1228 
                 file.  Make it look like a pcrel_offset relocation by
1229 
                 adding in the start address.  */
1230 
              if (howto->pc_relative)
1231 
                relocation += int_rel.r_vaddr;
1232 
            }
1233 
 
1234 
          if (int_rel.r_type != MIPS_R_REFHI)
1235 
            r = _bfd_final_link_relocate (howto,
1236 
                                          input_bfd,
1237 
                                          input_section,
1238 
                                          contents,
1239 
                                          (int_rel.r_vaddr
1240 
                                           - input_section->vma),
1241 
                                          relocation,
1242 
                                          addend);
1243 
          else
1244 
            {
1245 
              mips_relocate_hi (&int_rel,
1246 
                                use_lo ? &lo_int_rel : NULL,
1247 
                                input_bfd, input_section, contents,
1248 
                                relocation);
1249 
              r = bfd_reloc_ok;
1250 
            }
1251 
        }
1252 
 
1253 
      /* MIPS_R_JMPADDR requires peculiar overflow detection.  The
1254 
         instruction provides a 28 bit address (the two lower bits are
1255 
         implicit zeroes) which is combined with the upper four bits
1256 
         of the instruction address.  */
1257 
      if (r == bfd_reloc_ok
1258 
          && int_rel.r_type == MIPS_R_JMPADDR
1259 
          && (((relocation
1260 
                + addend
1261 
                + (int_rel.r_extern ? 0 : s->vma))
1262 
               & 0xf0000000)
1263 
              != ((input_section->output_section->vma
1264 
                   + input_section->output_offset
1265 
                   + (int_rel.r_vaddr - input_section->vma))
1266 
                  & 0xf0000000)))
1267 
        r = bfd_reloc_overflow;
1268 
 
1269 
      if (r != bfd_reloc_ok)
1270 
        {
1271 
          switch (r)
1272 
            {
1273 
            default:
1274 
            case bfd_reloc_outofrange:
1275 
              abort ();
1276 
            case bfd_reloc_overflow:
1277 
              {
1278 
                const char *name;
1279 
 
1280 
                if (int_rel.r_extern)
1281 
                  name = NULL;
1282 
                else
1283 
                  name = bfd_section_name (input_bfd, s);
1284 
                if (! ((*info->callbacks->reloc_overflow)
1285 
                       (info, (h ? &h->root : NULL), name, howto->name,
1286 
                        (bfd_vma) 0, input_bfd, input_section,
1287 
                        int_rel.r_vaddr - input_section->vma)))
1288 
                  return FALSE;
1289 
              }
1290 
              break;
1291 
            }
1292 
        }
1293 
    }
1294 
 
1295 
  return TRUE;
1296 
}
1297 
 
1298 
/* This is the ECOFF backend structure.  The backend field of the
1299 
   target vector points to this.  */
1300 
 
1301 
static const struct ecoff_backend_data mips_ecoff_backend_data =
1302 
{
1303 
  /* COFF backend structure.  */
1304 
  {
1305 
    (void (*) PARAMS ((bfd *,PTR,int,int,int,int,PTR))) bfd_void, /* aux_in */
1306 
    (void (*) PARAMS ((bfd *,PTR,PTR))) bfd_void, /* sym_in */
1307 
    (void (*) PARAMS ((bfd *,PTR,PTR))) bfd_void, /* lineno_in */
1308 
    (unsigned (*) PARAMS ((bfd *,PTR,int,int,int,int,PTR)))bfd_void,/*aux_out*/
1309 
    (unsigned (*) PARAMS ((bfd *,PTR,PTR))) bfd_void, /* sym_out */
1310 
    (unsigned (*) PARAMS ((bfd *,PTR,PTR))) bfd_void, /* lineno_out */
1311 
    (unsigned (*) PARAMS ((bfd *,PTR,PTR))) bfd_void, /* reloc_out */
1312 
    mips_ecoff_swap_filehdr_out, mips_ecoff_swap_aouthdr_out,
1313 
    mips_ecoff_swap_scnhdr_out,
1314 
    FILHSZ, AOUTSZ, SCNHSZ, 0, 0, 0, 0, FILNMLEN, TRUE, FALSE, 4, FALSE, 2,
1315 
    mips_ecoff_swap_filehdr_in, mips_ecoff_swap_aouthdr_in,
1316 
    mips_ecoff_swap_scnhdr_in, NULL,
1317 
    mips_ecoff_bad_format_hook, _bfd_ecoff_set_arch_mach_hook,
1318 
    _bfd_ecoff_mkobject_hook, _bfd_ecoff_styp_to_sec_flags,
1319 
    _bfd_ecoff_set_alignment_hook, _bfd_ecoff_slurp_symbol_table,
1320 
    NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1321 
    NULL, NULL
1322 
  },
1323 
  /* Supported architecture.  */
1324 
  bfd_arch_mips,
1325 
  /* Initial portion of armap string.  */
1326 
  "__________",
1327 
  /* The page boundary used to align sections in a demand-paged
1328 
     executable file.  E.g., 0x1000.  */
1329 
  0x1000,
1330 
  /* TRUE if the .rdata section is part of the text segment, as on the
1331 
     Alpha.  FALSE if .rdata is part of the data segment, as on the
1332 
     MIPS.  */
1333 
  FALSE,
1334 
  /* Bitsize of constructor entries.  */
1335 
  32,
1336 
  /* Reloc to use for constructor entries.  */
1337 
  &mips_howto_table[MIPS_R_REFWORD],
1338 
  {
1339 
    /* Symbol table magic number.  */
1340 
    magicSym,
1341 
    /* Alignment of debugging information.  E.g., 4.  */
1342 
    4,
1343 
    /* Sizes of external symbolic information.  */
1344 
    sizeof (struct hdr_ext),
1345 
    sizeof (struct dnr_ext),
1346 
    sizeof (struct pdr_ext),
1347 
    sizeof (struct sym_ext),
1348 
    sizeof (struct opt_ext),
1349 
    sizeof (struct fdr_ext),
1350 
    sizeof (struct rfd_ext),
1351 
    sizeof (struct ext_ext),
1352 
    /* Functions to swap in external symbolic data.  */
1353 
    ecoff_swap_hdr_in,
1354 
    ecoff_swap_dnr_in,
1355 
    ecoff_swap_pdr_in,
1356 
    ecoff_swap_sym_in,
1357 
    ecoff_swap_opt_in,
1358 
    ecoff_swap_fdr_in,
1359 
    ecoff_swap_rfd_in,
1360 
    ecoff_swap_ext_in,
1361 
    _bfd_ecoff_swap_tir_in,
1362 
    _bfd_ecoff_swap_rndx_in,
1363 
    /* Functions to swap out external symbolic data.  */
1364 
    ecoff_swap_hdr_out,
1365 
    ecoff_swap_dnr_out,
1366 
    ecoff_swap_pdr_out,
1367 
    ecoff_swap_sym_out,
1368 
    ecoff_swap_opt_out,
1369 
    ecoff_swap_fdr_out,
1370 
    ecoff_swap_rfd_out,
1371 
    ecoff_swap_ext_out,
1372 
    _bfd_ecoff_swap_tir_out,
1373 
    _bfd_ecoff_swap_rndx_out,
1374 
    /* Function to read in symbolic data.  */
1375 
    _bfd_ecoff_slurp_symbolic_info
1376 
  },
1377 
  /* External reloc size.  */
1378 
  RELSZ,
1379 
  /* Reloc swapping functions.  */
1380 
  mips_ecoff_swap_reloc_in,
1381 
  mips_ecoff_swap_reloc_out,
1382 
  /* Backend reloc tweaking.  */
1383 
  mips_adjust_reloc_in,
1384 
  mips_adjust_reloc_out,
1385 
  /* Relocate section contents while linking.  */
1386 
  mips_relocate_section,
1387 
  /* Do final adjustments to filehdr and aouthdr.  */
1388 
  NULL,
1389 
  /* Read an element from an archive at a given file position.  */
1390 
  _bfd_get_elt_at_filepos
1391 
};
1392 
 
1393 
/* Looking up a reloc type is MIPS specific.  */
1394 
#define _bfd_ecoff_bfd_reloc_type_lookup mips_bfd_reloc_type_lookup
1395 
#define _bfd_ecoff_bfd_reloc_name_lookup mips_bfd_reloc_name_lookup
1396 
 
1397 
/* Getting relocated section contents is generic.  */
1398 
#define _bfd_ecoff_bfd_get_relocated_section_contents \
1399 
  bfd_generic_get_relocated_section_contents
1400 
 
1401 
/* Handling file windows is generic.  */
1402 
#define _bfd_ecoff_get_section_contents_in_window \
1403 
  _bfd_generic_get_section_contents_in_window
1404 
 
1405 
/* Relaxing sections is MIPS specific.  */
1406 
#define _bfd_ecoff_bfd_relax_section bfd_generic_relax_section
1407 
 
1408 
/* GC of sections is not done.  */
1409 
#define _bfd_ecoff_bfd_gc_sections bfd_generic_gc_sections
1410 
 
1411 
/* Merging of sections is not done.  */
1412 
#define _bfd_ecoff_bfd_merge_sections bfd_generic_merge_sections
1413 
 
1414 
#define _bfd_ecoff_bfd_is_group_section bfd_generic_is_group_section
1415 
#define _bfd_ecoff_bfd_discard_group bfd_generic_discard_group
1416 
#define _bfd_ecoff_section_already_linked \
1417 
  _bfd_generic_section_already_linked
1418 
 
1419 
extern const bfd_target ecoff_big_vec;
1420 
 
1421 
const bfd_target ecoff_little_vec =
1422 
{
1423 
  "ecoff-littlemips",           /* name */
1424 
  bfd_target_ecoff_flavour,
1425 
  BFD_ENDIAN_LITTLE,            /* data byte order is little */
1426 
  BFD_ENDIAN_LITTLE,            /* header byte order is little */
1427 
 
1428 
  (HAS_RELOC | EXEC_P |         /* object flags */
1429 
   HAS_LINENO | HAS_DEBUG |
1430 
   HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED),
1431 
 
1432 
  (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC | SEC_CODE | SEC_DATA),
1433 
  0,                             /* leading underscore */
1434 
  ' ',                          /* ar_pad_char */
1435 
  15,                           /* ar_max_namelen */
1436 
  bfd_getl64, bfd_getl_signed_64, bfd_putl64,
1437 
     bfd_getl32, bfd_getl_signed_32, bfd_putl32,
1438 
     bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* data */
1439 
  bfd_getl64, bfd_getl_signed_64, bfd_putl64,
1440 
     bfd_getl32, bfd_getl_signed_32, bfd_putl32,
1441 
     bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* hdrs */
1442 
 
1443 
  {_bfd_dummy_target, coff_object_p, /* bfd_check_format */
1444 
     bfd_generic_archive_p, _bfd_dummy_target},
1445 
  {bfd_false, _bfd_ecoff_mkobject,  /* bfd_set_format */
1446 
     _bfd_generic_mkarchive, bfd_false},
1447 
  {bfd_false, _bfd_ecoff_write_object_contents, /* bfd_write_contents */
1448 
     _bfd_write_archive_contents, bfd_false},
1449 
 
1450 
     BFD_JUMP_TABLE_GENERIC (_bfd_ecoff),
1451 
     BFD_JUMP_TABLE_COPY (_bfd_ecoff),
1452 
     BFD_JUMP_TABLE_CORE (_bfd_nocore),
1453 
     BFD_JUMP_TABLE_ARCHIVE (_bfd_ecoff),
1454 
     BFD_JUMP_TABLE_SYMBOLS (_bfd_ecoff),
1455 
     BFD_JUMP_TABLE_RELOCS (_bfd_ecoff),
1456 
     BFD_JUMP_TABLE_WRITE (_bfd_ecoff),
1457 
     BFD_JUMP_TABLE_LINK (_bfd_ecoff),
1458 
     BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
1459 
 
1460 
  & ecoff_big_vec,
1461 
 
1462 
  (PTR) &mips_ecoff_backend_data
1463 
};
1464 
 
1465 
const bfd_target ecoff_big_vec =
1466 
{
1467 
  "ecoff-bigmips",              /* name */
1468 
  bfd_target_ecoff_flavour,
1469 
  BFD_ENDIAN_BIG,               /* data byte order is big */
1470 
  BFD_ENDIAN_BIG,               /* header byte order is big */
1471 
 
1472 
  (HAS_RELOC | EXEC_P |         /* object flags */
1473 
   HAS_LINENO | HAS_DEBUG |
1474 
   HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED),
1475 
 
1476 
  (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC | SEC_CODE | SEC_DATA),
1477 
  0,                             /* leading underscore */
1478 
  ' ',                          /* ar_pad_char */
1479 
  15,                           /* ar_max_namelen */
1480 
  bfd_getb64, bfd_getb_signed_64, bfd_putb64,
1481 
     bfd_getb32, bfd_getb_signed_32, bfd_putb32,
1482 
     bfd_getb16, bfd_getb_signed_16, bfd_putb16,
1483 
  bfd_getb64, bfd_getb_signed_64, bfd_putb64,
1484 
     bfd_getb32, bfd_getb_signed_32, bfd_putb32,
1485 
     bfd_getb16, bfd_getb_signed_16, bfd_putb16,
1486 
 {_bfd_dummy_target, coff_object_p, /* bfd_check_format */
1487 
    bfd_generic_archive_p, _bfd_dummy_target},
1488 
 {bfd_false, _bfd_ecoff_mkobject, /* bfd_set_format */
1489 
    _bfd_generic_mkarchive, bfd_false},
1490 
 {bfd_false, _bfd_ecoff_write_object_contents, /* bfd_write_contents */
1491 
    _bfd_write_archive_contents, bfd_false},
1492 
 
1493 
     BFD_JUMP_TABLE_GENERIC (_bfd_ecoff),
1494 
     BFD_JUMP_TABLE_COPY (_bfd_ecoff),
1495 
     BFD_JUMP_TABLE_CORE (_bfd_nocore),
1496 
     BFD_JUMP_TABLE_ARCHIVE (_bfd_ecoff),
1497 
     BFD_JUMP_TABLE_SYMBOLS (_bfd_ecoff),
1498 
     BFD_JUMP_TABLE_RELOCS (_bfd_ecoff),
1499 
     BFD_JUMP_TABLE_WRITE (_bfd_ecoff),
1500 
     BFD_JUMP_TABLE_LINK (_bfd_ecoff),
1501 
     BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
1502 
 
1503 
  & ecoff_little_vec,
1504 
 
1505 
  (PTR) &mips_ecoff_backend_data
1506 
};
1507 
 
1508 
const bfd_target ecoff_biglittle_vec =
1509 
{
1510 
  "ecoff-biglittlemips",                /* name */
1511 
  bfd_target_ecoff_flavour,
1512 
  BFD_ENDIAN_LITTLE,            /* data byte order is little */
1513 
  BFD_ENDIAN_BIG,               /* header byte order is big */
1514 
 
1515 
  (HAS_RELOC | EXEC_P |         /* object flags */
1516 
   HAS_LINENO | HAS_DEBUG |
1517 
   HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED),
1518 
 
1519 
  (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC | SEC_CODE | SEC_DATA),
1520 
  0,                             /* leading underscore */
1521 
  ' ',                          /* ar_pad_char */
1522 
  15,                           /* ar_max_namelen */
1523 
  bfd_getl64, bfd_getl_signed_64, bfd_putl64,
1524 
     bfd_getl32, bfd_getl_signed_32, bfd_putl32,
1525 
     bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* data */
1526 
  bfd_getb64, bfd_getb_signed_64, bfd_putb64,
1527 
     bfd_getb32, bfd_getb_signed_32, bfd_putb32,
1528 
     bfd_getb16, bfd_getb_signed_16, bfd_putb16, /* hdrs */
1529 
 
1530 
  {_bfd_dummy_target, coff_object_p, /* bfd_check_format */
1531 
     bfd_generic_archive_p, _bfd_dummy_target},
1532 
  {bfd_false, _bfd_ecoff_mkobject,  /* bfd_set_format */
1533 
     _bfd_generic_mkarchive, bfd_false},
1534 
  {bfd_false, _bfd_ecoff_write_object_contents, /* bfd_write_contents */
1535 
     _bfd_write_archive_contents, bfd_false},
1536 
 
1537 
     BFD_JUMP_TABLE_GENERIC (_bfd_ecoff),
1538 
     BFD_JUMP_TABLE_COPY (_bfd_ecoff),
1539 
     BFD_JUMP_TABLE_CORE (_bfd_nocore),
1540 
     BFD_JUMP_TABLE_ARCHIVE (_bfd_ecoff),
1541 
     BFD_JUMP_TABLE_SYMBOLS (_bfd_ecoff),
1542 
     BFD_JUMP_TABLE_RELOCS (_bfd_ecoff),
1543 
     BFD_JUMP_TABLE_WRITE (_bfd_ecoff),
1544 
     BFD_JUMP_TABLE_LINK (_bfd_ecoff),
1545 
     BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
1546 
 
1547 
  NULL,
1548 
 
1549 
  (PTR) &mips_ecoff_backend_data
1550 
};

powered by: WebSVN 2.1.0

© copyright 1999-2024 OpenCores.org, equivalent to Oliscience, all rights reserved. OpenCores®, registered trademark.