Commit | Line | Data |
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1f29e30b | 1 | /* BFD back-end for MIPS Extended-Coff files. |
f6409552 | 2 | Copyright 1990, 1991, 1992, 1993 Free Software Foundation, Inc. |
8fa0d3a0 | 3 | Original version by Per Bothner. |
f6409552 | 4 | Full support added by Ian Lance Taylor, ian@cygnus.com. |
1327fb29 | 5 | |
68b70212 | 6 | This file is part of BFD, the Binary File Descriptor library. |
23b0b558 | 7 | |
68b70212 | 8 | This program is free software; you can redistribute it and/or modify |
23b0b558 | 9 | it under the terms of the GNU General Public License as published by |
68b70212 JG |
10 | the Free Software Foundation; either version 2 of the License, or |
11 | (at your option) any later version. | |
23b0b558 | 12 | |
68b70212 | 13 | This program is distributed in the hope that it will be useful, |
23b0b558 JG |
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 | |
68b70212 JG |
19 | along with this program; if not, write to the Free Software |
20 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
1327fb29 | 21 | |
23b0b558 | 22 | #include "bfd.h" |
dd4646ca | 23 | #include "sysdep.h" |
4991ebb9 | 24 | #include "bfdlink.h" |
1327fb29 | 25 | #include "libbfd.h" |
dae31cf5 ILT |
26 | #include "coff/internal.h" |
27 | #include "coff/sym.h" | |
28 | #include "coff/symconst.h" | |
29 | #include "coff/ecoff.h" | |
30 | #include "coff/mips.h" | |
31 | #include "libcoff.h" | |
32 | #include "libecoff.h" | |
33 | \f | |
34 | /* Prototypes for static functions. */ | |
c3fe0c41 | 35 | |
dae31cf5 | 36 | static boolean mips_ecoff_bad_format_hook PARAMS ((bfd *abfd, PTR filehdr)); |
dae31cf5 ILT |
37 | static void mips_ecoff_swap_reloc_in PARAMS ((bfd *, PTR, |
38 | struct internal_reloc *)); | |
39 | static void mips_ecoff_swap_reloc_out PARAMS ((bfd *, | |
40 | const struct internal_reloc *, | |
41 | PTR)); | |
5fa2aaa2 ILT |
42 | static void mips_adjust_reloc_in PARAMS ((bfd *, |
43 | const struct internal_reloc *, | |
44 | arelent *)); | |
45 | static void mips_adjust_reloc_out PARAMS ((bfd *, const arelent *, | |
46 | struct internal_reloc *)); | |
23f44e6f ILT |
47 | static bfd_reloc_status_type mips_generic_reloc PARAMS ((bfd *abfd, |
48 | arelent *reloc, | |
49 | asymbol *symbol, | |
50 | PTR data, | |
51 | asection *section, | |
4991ebb9 ILT |
52 | bfd *output_bfd, |
53 | char **error)); | |
23f44e6f ILT |
54 | static bfd_reloc_status_type mips_refhi_reloc PARAMS ((bfd *abfd, |
55 | arelent *reloc, | |
56 | asymbol *symbol, | |
57 | PTR data, | |
58 | asection *section, | |
4991ebb9 ILT |
59 | bfd *output_bfd, |
60 | char **error)); | |
23f44e6f ILT |
61 | static bfd_reloc_status_type mips_reflo_reloc PARAMS ((bfd *abfd, |
62 | arelent *reloc, | |
63 | asymbol *symbol, | |
64 | PTR data, | |
65 | asection *section, | |
4991ebb9 ILT |
66 | bfd *output_bfd, |
67 | char **error)); | |
23f44e6f ILT |
68 | static bfd_reloc_status_type mips_gprel_reloc PARAMS ((bfd *abfd, |
69 | arelent *reloc, | |
70 | asymbol *symbol, | |
71 | PTR data, | |
72 | asection *section, | |
4991ebb9 ILT |
73 | bfd *output_bfd, |
74 | char **error)); | |
75 | static void mips_relocate_refhi PARAMS ((struct internal_reloc *refhi, | |
76 | struct internal_reloc *reflo, | |
77 | bfd *input_bfd, | |
78 | asection *input_section, | |
79 | bfd_byte *contents, | |
80 | bfd_vma relocation)); | |
81 | static boolean mips_relocate_section PARAMS ((bfd *, struct bfd_link_info *, | |
82 | bfd *, asection *, | |
83 | bfd_byte *, PTR)); | |
dae31cf5 | 84 | \f |
dae31cf5 ILT |
85 | /* ECOFF has COFF sections, but the debugging information is stored in |
86 | a completely different format. ECOFF targets use some of the | |
87 | swapping routines from coffswap.h, and some of the generic COFF | |
88 | routines in coffgen.c, but, unlike the real COFF targets, do not | |
89 | use coffcode.h itself. | |
8fa0d3a0 | 90 | |
dae31cf5 | 91 | Get the generic COFF swapping routines, except for the reloc, |
23f44e6f | 92 | symbol, and lineno ones. Give them ECOFF names. */ |
dae31cf5 ILT |
93 | #define MIPSECOFF |
94 | #define NO_COFF_RELOCS | |
95 | #define NO_COFF_SYMBOLS | |
96 | #define NO_COFF_LINENOS | |
97 | #define coff_swap_filehdr_in mips_ecoff_swap_filehdr_in | |
98 | #define coff_swap_filehdr_out mips_ecoff_swap_filehdr_out | |
99 | #define coff_swap_aouthdr_in mips_ecoff_swap_aouthdr_in | |
100 | #define coff_swap_aouthdr_out mips_ecoff_swap_aouthdr_out | |
101 | #define coff_swap_scnhdr_in mips_ecoff_swap_scnhdr_in | |
102 | #define coff_swap_scnhdr_out mips_ecoff_swap_scnhdr_out | |
103 | #include "coffswap.h" | |
8fa0d3a0 | 104 | |
dae31cf5 ILT |
105 | /* Get the ECOFF swapping routines. */ |
106 | #define ECOFF_32 | |
107 | #include "ecoffswap.h" | |
108 | \f | |
23f44e6f | 109 | /* How to process the various relocs types. */ |
dae31cf5 | 110 | |
23f44e6f | 111 | static reloc_howto_type mips_howto_table[] = |
dae31cf5 | 112 | { |
23f44e6f ILT |
113 | /* Reloc type 0 is ignored. The reloc reading code ensures that |
114 | this is a reference to the .abs section, which will cause | |
115 | bfd_perform_relocation to do nothing. */ | |
116 | HOWTO (MIPS_R_IGNORE, /* type */ | |
117 | 0, /* rightshift */ | |
118 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
119 | 8, /* bitsize */ | |
120 | false, /* pc_relative */ | |
121 | 0, /* bitpos */ | |
122 | complain_overflow_dont, /* complain_on_overflow */ | |
123 | 0, /* special_function */ | |
124 | "IGNORE", /* name */ | |
125 | false, /* partial_inplace */ | |
126 | 0, /* src_mask */ | |
127 | 0, /* dst_mask */ | |
128 | false), /* pcrel_offset */ | |
129 | ||
130 | /* A 16 bit reference to a symbol, normally from a data section. */ | |
131 | HOWTO (MIPS_R_REFHALF, /* type */ | |
132 | 0, /* rightshift */ | |
133 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
134 | 16, /* bitsize */ | |
135 | false, /* pc_relative */ | |
136 | 0, /* bitpos */ | |
137 | complain_overflow_bitfield, /* complain_on_overflow */ | |
138 | mips_generic_reloc, /* special_function */ | |
139 | "REFHALF", /* name */ | |
140 | true, /* partial_inplace */ | |
141 | 0xffff, /* src_mask */ | |
142 | 0xffff, /* dst_mask */ | |
143 | false), /* pcrel_offset */ | |
144 | ||
145 | /* A 32 bit reference to a symbol, normally from a data section. */ | |
146 | HOWTO (MIPS_R_REFWORD, /* type */ | |
147 | 0, /* rightshift */ | |
148 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
149 | 32, /* bitsize */ | |
150 | false, /* pc_relative */ | |
151 | 0, /* bitpos */ | |
152 | complain_overflow_bitfield, /* complain_on_overflow */ | |
153 | mips_generic_reloc, /* special_function */ | |
154 | "REFWORD", /* name */ | |
155 | true, /* partial_inplace */ | |
156 | 0xffffffff, /* src_mask */ | |
157 | 0xffffffff, /* dst_mask */ | |
158 | false), /* pcrel_offset */ | |
159 | ||
160 | /* A 26 bit absolute jump address. */ | |
161 | HOWTO (MIPS_R_JMPADDR, /* type */ | |
162 | 2, /* rightshift */ | |
163 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
164 | 26, /* bitsize */ | |
165 | false, /* pc_relative */ | |
166 | 0, /* bitpos */ | |
5fa2aaa2 ILT |
167 | complain_overflow_dont, /* complain_on_overflow */ |
168 | /* This needs complex overflow | |
169 | detection, because the upper four | |
170 | bits must match the PC. */ | |
23f44e6f ILT |
171 | mips_generic_reloc, /* special_function */ |
172 | "JMPADDR", /* name */ | |
173 | true, /* partial_inplace */ | |
174 | 0x3ffffff, /* src_mask */ | |
175 | 0x3ffffff, /* dst_mask */ | |
176 | false), /* pcrel_offset */ | |
177 | ||
178 | /* The high 16 bits of a symbol value. Handled by the function | |
179 | mips_refhi_reloc. */ | |
180 | HOWTO (MIPS_R_REFHI, /* type */ | |
181 | 16, /* rightshift */ | |
182 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
183 | 16, /* bitsize */ | |
184 | false, /* pc_relative */ | |
185 | 0, /* bitpos */ | |
186 | complain_overflow_bitfield, /* complain_on_overflow */ | |
187 | mips_refhi_reloc, /* special_function */ | |
188 | "REFHI", /* name */ | |
189 | true, /* partial_inplace */ | |
190 | 0xffff, /* src_mask */ | |
191 | 0xffff, /* dst_mask */ | |
192 | false), /* pcrel_offset */ | |
193 | ||
194 | /* The low 16 bits of a symbol value. */ | |
195 | HOWTO (MIPS_R_REFLO, /* type */ | |
196 | 0, /* rightshift */ | |
197 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
198 | 16, /* bitsize */ | |
199 | false, /* pc_relative */ | |
200 | 0, /* bitpos */ | |
201 | complain_overflow_dont, /* complain_on_overflow */ | |
202 | mips_reflo_reloc, /* special_function */ | |
203 | "REFLO", /* name */ | |
204 | true, /* partial_inplace */ | |
205 | 0xffff, /* src_mask */ | |
206 | 0xffff, /* dst_mask */ | |
207 | false), /* pcrel_offset */ | |
208 | ||
209 | /* A reference to an offset from the gp register. Handled by the | |
210 | function mips_gprel_reloc. */ | |
211 | HOWTO (MIPS_R_GPREL, /* type */ | |
212 | 0, /* rightshift */ | |
213 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
214 | 16, /* bitsize */ | |
215 | false, /* pc_relative */ | |
216 | 0, /* bitpos */ | |
217 | complain_overflow_signed, /* complain_on_overflow */ | |
218 | mips_gprel_reloc, /* special_function */ | |
219 | "GPREL", /* name */ | |
220 | true, /* partial_inplace */ | |
221 | 0xffff, /* src_mask */ | |
222 | 0xffff, /* dst_mask */ | |
223 | false), /* pcrel_offset */ | |
224 | ||
225 | /* A reference to a literal using an offset from the gp register. | |
226 | Handled by the function mips_gprel_reloc. */ | |
227 | HOWTO (MIPS_R_LITERAL, /* type */ | |
228 | 0, /* rightshift */ | |
229 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
230 | 16, /* bitsize */ | |
231 | false, /* pc_relative */ | |
232 | 0, /* bitpos */ | |
233 | complain_overflow_signed, /* complain_on_overflow */ | |
234 | mips_gprel_reloc, /* special_function */ | |
235 | "LITERAL", /* name */ | |
236 | true, /* partial_inplace */ | |
237 | 0xffff, /* src_mask */ | |
238 | 0xffff, /* dst_mask */ | |
239 | false) /* pcrel_offset */ | |
dae31cf5 | 240 | }; |
23f44e6f ILT |
241 | |
242 | #define MIPS_HOWTO_COUNT \ | |
243 | (sizeof mips_howto_table / sizeof mips_howto_table[0]) | |
dae31cf5 ILT |
244 | \f |
245 | /* See whether the magic number matches. */ | |
8fa0d3a0 | 246 | |
dae31cf5 ILT |
247 | static boolean |
248 | mips_ecoff_bad_format_hook (abfd, filehdr) | |
249 | bfd *abfd; | |
250 | PTR filehdr; | |
251 | { | |
252 | struct internal_filehdr *internal_f = (struct internal_filehdr *) filehdr; | |
8fa0d3a0 | 253 | |
5fa2aaa2 ILT |
254 | switch (internal_f->f_magic) |
255 | { | |
256 | case MIPS_MAGIC_1: | |
257 | /* I don't know what endianness this implies. */ | |
258 | return true; | |
c3fe0c41 | 259 | |
5fa2aaa2 ILT |
260 | case MIPS_MAGIC_BIG: |
261 | case MIPS_MAGIC_BIG2: | |
262 | case MIPS_MAGIC_BIG3: | |
263 | return abfd->xvec->byteorder_big_p; | |
c3fe0c41 | 264 | |
5fa2aaa2 ILT |
265 | case MIPS_MAGIC_LITTLE: |
266 | case MIPS_MAGIC_LITTLE2: | |
267 | case MIPS_MAGIC_LITTLE3: | |
268 | return abfd->xvec->byteorder_big_p == false; | |
23ba15b7 | 269 | |
5fa2aaa2 ILT |
270 | default: |
271 | return false; | |
c3fe0c41 | 272 | } |
dae31cf5 ILT |
273 | } |
274 | \f | |
275 | /* Reloc handling. MIPS ECOFF relocs are packed into 8 bytes in | |
276 | external form. They use a bit which indicates whether the symbol | |
277 | is external. */ | |
23ba15b7 | 278 | |
dae31cf5 | 279 | /* Swap a reloc in. */ |
23ba15b7 | 280 | |
dae31cf5 ILT |
281 | static void |
282 | mips_ecoff_swap_reloc_in (abfd, ext_ptr, intern) | |
283 | bfd *abfd; | |
284 | PTR ext_ptr; | |
285 | struct internal_reloc *intern; | |
286 | { | |
287 | const RELOC *ext = (RELOC *) ext_ptr; | |
23ba15b7 | 288 | |
dae31cf5 ILT |
289 | intern->r_vaddr = bfd_h_get_32 (abfd, (bfd_byte *) ext->r_vaddr); |
290 | if (abfd->xvec->header_byteorder_big_p != false) | |
291 | { | |
292 | intern->r_symndx = (((int) ext->r_bits[0] | |
293 | << RELOC_BITS0_SYMNDX_SH_LEFT_BIG) | |
294 | | ((int) ext->r_bits[1] | |
295 | << RELOC_BITS1_SYMNDX_SH_LEFT_BIG) | |
296 | | ((int) ext->r_bits[2] | |
297 | << RELOC_BITS2_SYMNDX_SH_LEFT_BIG)); | |
298 | intern->r_type = ((ext->r_bits[3] & RELOC_BITS3_TYPE_BIG) | |
299 | >> RELOC_BITS3_TYPE_SH_BIG); | |
300 | intern->r_extern = (ext->r_bits[3] & RELOC_BITS3_EXTERN_BIG) != 0; | |
23ba15b7 | 301 | } |
dae31cf5 | 302 | else |
23ba15b7 | 303 | { |
dae31cf5 ILT |
304 | intern->r_symndx = (((int) ext->r_bits[0] |
305 | << RELOC_BITS0_SYMNDX_SH_LEFT_LITTLE) | |
306 | | ((int) ext->r_bits[1] | |
307 | << RELOC_BITS1_SYMNDX_SH_LEFT_LITTLE) | |
308 | | ((int) ext->r_bits[2] | |
309 | << RELOC_BITS2_SYMNDX_SH_LEFT_LITTLE)); | |
310 | intern->r_type = ((ext->r_bits[3] & RELOC_BITS3_TYPE_LITTLE) | |
311 | >> RELOC_BITS3_TYPE_SH_LITTLE); | |
312 | intern->r_extern = (ext->r_bits[3] & RELOC_BITS3_EXTERN_LITTLE) != 0; | |
23ba15b7 | 313 | } |
c3fe0c41 ILT |
314 | } |
315 | ||
dae31cf5 | 316 | /* Swap a reloc out. */ |
c3fe0c41 | 317 | |
dae31cf5 ILT |
318 | static void |
319 | mips_ecoff_swap_reloc_out (abfd, intern, dst) | |
f6409552 | 320 | bfd *abfd; |
dae31cf5 ILT |
321 | const struct internal_reloc *intern; |
322 | PTR dst; | |
c3fe0c41 | 323 | { |
dae31cf5 | 324 | RELOC *ext = (RELOC *) dst; |
c3fe0c41 | 325 | |
5fa2aaa2 ILT |
326 | BFD_ASSERT (intern->r_extern |
327 | || (intern->r_symndx >= 0 && intern->r_symndx <= 12)); | |
328 | ||
dae31cf5 ILT |
329 | bfd_h_put_32 (abfd, intern->r_vaddr, (bfd_byte *) ext->r_vaddr); |
330 | if (abfd->xvec->header_byteorder_big_p != false) | |
c3fe0c41 | 331 | { |
dae31cf5 ILT |
332 | ext->r_bits[0] = intern->r_symndx >> RELOC_BITS0_SYMNDX_SH_LEFT_BIG; |
333 | ext->r_bits[1] = intern->r_symndx >> RELOC_BITS1_SYMNDX_SH_LEFT_BIG; | |
334 | ext->r_bits[2] = intern->r_symndx >> RELOC_BITS2_SYMNDX_SH_LEFT_BIG; | |
335 | ext->r_bits[3] = (((intern->r_type << RELOC_BITS3_TYPE_SH_BIG) | |
336 | & RELOC_BITS3_TYPE_BIG) | |
337 | | (intern->r_extern ? RELOC_BITS3_EXTERN_BIG : 0)); | |
c3fe0c41 | 338 | } |
dae31cf5 | 339 | else |
c3fe0c41 | 340 | { |
dae31cf5 ILT |
341 | ext->r_bits[0] = intern->r_symndx >> RELOC_BITS0_SYMNDX_SH_LEFT_LITTLE; |
342 | ext->r_bits[1] = intern->r_symndx >> RELOC_BITS1_SYMNDX_SH_LEFT_LITTLE; | |
343 | ext->r_bits[2] = intern->r_symndx >> RELOC_BITS2_SYMNDX_SH_LEFT_LITTLE; | |
344 | ext->r_bits[3] = (((intern->r_type << RELOC_BITS3_TYPE_SH_LITTLE) | |
345 | & RELOC_BITS3_TYPE_LITTLE) | |
346 | | (intern->r_extern ? RELOC_BITS3_EXTERN_LITTLE : 0)); | |
c3fe0c41 | 347 | } |
c3fe0c41 | 348 | } |
23f44e6f ILT |
349 | |
350 | /* Finish canonicalizing a reloc. Part of this is generic to all | |
351 | ECOFF targets, and that part is in ecoff.c. The rest is done in | |
352 | this backend routine. It must fill in the howto field. */ | |
353 | ||
354 | static void | |
5fa2aaa2 | 355 | mips_adjust_reloc_in (abfd, intern, rptr) |
23f44e6f | 356 | bfd *abfd; |
5fa2aaa2 | 357 | const struct internal_reloc *intern; |
23f44e6f ILT |
358 | arelent *rptr; |
359 | { | |
360 | if (intern->r_type > MIPS_R_LITERAL) | |
361 | abort (); | |
362 | ||
363 | if (! intern->r_extern | |
364 | && (intern->r_type == MIPS_R_GPREL | |
365 | || intern->r_type == MIPS_R_LITERAL)) | |
366 | rptr->addend += ecoff_data (abfd)->gp; | |
367 | ||
368 | /* If the type is MIPS_R_IGNORE, make sure this is a reference to | |
369 | the absolute section so that the reloc is ignored. */ | |
370 | if (intern->r_type == MIPS_R_IGNORE) | |
371 | rptr->sym_ptr_ptr = bfd_abs_section.symbol_ptr_ptr; | |
372 | ||
373 | rptr->howto = &mips_howto_table[intern->r_type]; | |
374 | } | |
375 | ||
5fa2aaa2 ILT |
376 | /* Make any adjustments needed to a reloc before writing it out. None |
377 | are needed for MIPS. */ | |
378 | ||
379 | static void | |
4991ebb9 | 380 | mips_adjust_reloc_out (abfd, rel, intern) |
5fa2aaa2 ILT |
381 | bfd *abfd; |
382 | const arelent *rel; | |
383 | struct internal_reloc *intern; | |
384 | { | |
385 | } | |
386 | ||
23f44e6f ILT |
387 | /* ECOFF relocs are either against external symbols, or against |
388 | sections. If we are producing relocateable output, and the reloc | |
389 | is against an external symbol, and nothing has given us any | |
390 | additional addend, the resulting reloc will also be against the | |
391 | same symbol. In such a case, we don't want to change anything | |
392 | about the way the reloc is handled, since it will all be done at | |
393 | final link time. Rather than put special case code into | |
394 | bfd_perform_relocation, all the reloc types use this howto | |
395 | function. It just short circuits the reloc if producing | |
396 | relocateable output against an external symbol. */ | |
397 | ||
398 | static bfd_reloc_status_type | |
399 | mips_generic_reloc (abfd, | |
400 | reloc_entry, | |
401 | symbol, | |
402 | data, | |
403 | input_section, | |
4991ebb9 ILT |
404 | output_bfd, |
405 | error_message) | |
23f44e6f ILT |
406 | bfd *abfd; |
407 | arelent *reloc_entry; | |
408 | asymbol *symbol; | |
409 | PTR data; | |
410 | asection *input_section; | |
411 | bfd *output_bfd; | |
4991ebb9 | 412 | char **error_message; |
23f44e6f ILT |
413 | { |
414 | if (output_bfd != (bfd *) NULL | |
415 | && (symbol->flags & BSF_SECTION_SYM) == 0 | |
416 | && reloc_entry->addend == 0) | |
417 | { | |
418 | reloc_entry->address += input_section->output_offset; | |
419 | return bfd_reloc_ok; | |
420 | } | |
421 | ||
422 | return bfd_reloc_continue; | |
423 | } | |
424 | ||
425 | /* Do a REFHI relocation. This has to be done in combination with a | |
426 | REFLO reloc, because there is a carry from the REFLO to the REFHI. | |
427 | Here we just save the information we need; we do the actual | |
428 | relocation when we see the REFLO. MIPS ECOFF requires that the | |
429 | REFLO immediately follow the REFHI, so this ought to work. */ | |
430 | ||
431 | static bfd_byte *mips_refhi_addr; | |
432 | static bfd_vma mips_refhi_addend; | |
433 | ||
434 | static bfd_reloc_status_type | |
435 | mips_refhi_reloc (abfd, | |
436 | reloc_entry, | |
437 | symbol, | |
438 | data, | |
439 | input_section, | |
4991ebb9 ILT |
440 | output_bfd, |
441 | error_message) | |
23f44e6f ILT |
442 | bfd *abfd; |
443 | arelent *reloc_entry; | |
444 | asymbol *symbol; | |
445 | PTR data; | |
446 | asection *input_section; | |
447 | bfd *output_bfd; | |
4991ebb9 | 448 | char **error_message; |
23f44e6f ILT |
449 | { |
450 | bfd_reloc_status_type ret; | |
451 | bfd_vma relocation; | |
452 | ||
453 | /* If we're relocating, and this an external symbol, we don't want | |
454 | to change anything. */ | |
455 | if (output_bfd != (bfd *) NULL | |
456 | && (symbol->flags & BSF_SECTION_SYM) == 0 | |
457 | && reloc_entry->addend == 0) | |
458 | { | |
459 | reloc_entry->address += input_section->output_offset; | |
460 | return bfd_reloc_ok; | |
461 | } | |
462 | ||
463 | ret = bfd_reloc_ok; | |
464 | if (symbol->section == &bfd_und_section | |
465 | && output_bfd == (bfd *) NULL) | |
466 | ret = bfd_reloc_undefined; | |
467 | ||
468 | if (bfd_is_com_section (symbol->section)) | |
469 | relocation = 0; | |
470 | else | |
471 | relocation = symbol->value; | |
472 | ||
473 | relocation += symbol->section->output_section->vma; | |
474 | relocation += symbol->section->output_offset; | |
475 | relocation += reloc_entry->addend; | |
476 | ||
477 | if (reloc_entry->address > input_section->_cooked_size) | |
478 | return bfd_reloc_outofrange; | |
479 | ||
480 | /* Save the information, and let REFLO do the actual relocation. */ | |
481 | mips_refhi_addr = (bfd_byte *) data + reloc_entry->address; | |
482 | mips_refhi_addend = relocation; | |
483 | ||
484 | if (output_bfd != (bfd *) NULL) | |
485 | reloc_entry->address += input_section->output_offset; | |
486 | ||
487 | return ret; | |
488 | } | |
489 | ||
490 | /* Do a REFLO relocation. This is a straightforward 16 bit inplace | |
491 | relocation; this function exists in order to do the REFHI | |
492 | relocation described above. */ | |
493 | ||
494 | static bfd_reloc_status_type | |
495 | mips_reflo_reloc (abfd, | |
496 | reloc_entry, | |
497 | symbol, | |
498 | data, | |
499 | input_section, | |
4991ebb9 ILT |
500 | output_bfd, |
501 | error_message) | |
23f44e6f ILT |
502 | bfd *abfd; |
503 | arelent *reloc_entry; | |
504 | asymbol *symbol; | |
505 | PTR data; | |
506 | asection *input_section; | |
507 | bfd *output_bfd; | |
4991ebb9 | 508 | char **error_message; |
23f44e6f ILT |
509 | { |
510 | if (mips_refhi_addr != (bfd_byte *) NULL) | |
511 | { | |
512 | unsigned long insn; | |
513 | unsigned long val; | |
514 | unsigned long vallo; | |
515 | ||
516 | /* Do the REFHI relocation. Note that we actually don't need to | |
517 | know anything about the REFLO itself, except where to find | |
518 | the low 16 bits of the addend needed by the REFHI. */ | |
519 | insn = bfd_get_32 (abfd, mips_refhi_addr); | |
520 | vallo = (bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address) | |
521 | & 0xffff); | |
522 | val = ((insn & 0xffff) << 16) + vallo; | |
523 | val += mips_refhi_addend; | |
524 | ||
525 | /* The low order 16 bits are always treated as a signed value. | |
526 | Therefore, a negative value in the low order bits requires an | |
527 | adjustment in the high order bits. We need to make this | |
528 | adjustment in two ways: once for the bits we took from the | |
529 | data, and once for the bits we are putting back in to the | |
530 | data. */ | |
531 | if ((vallo & 0x8000) != 0) | |
532 | val -= 0x10000; | |
533 | if ((val & 0x8000) != 0) | |
534 | val += 0x10000; | |
535 | ||
536 | insn = (insn &~ 0xffff) | ((val >> 16) & 0xffff); | |
537 | bfd_put_32 (abfd, insn, mips_refhi_addr); | |
538 | ||
539 | mips_refhi_addr = (bfd_byte *) NULL; | |
540 | } | |
541 | ||
542 | /* Now do the REFLO reloc in the usual way. */ | |
543 | return mips_generic_reloc (abfd, reloc_entry, symbol, data, | |
4991ebb9 | 544 | input_section, output_bfd, error_message); |
23f44e6f ILT |
545 | } |
546 | ||
547 | /* Do a GPREL relocation. This is a 16 bit value which must become | |
548 | the offset from the gp register. */ | |
549 | ||
550 | static bfd_reloc_status_type | |
551 | mips_gprel_reloc (abfd, | |
4991ebb9 ILT |
552 | reloc_entry, |
553 | symbol, | |
554 | data, | |
555 | input_section, | |
556 | output_bfd, | |
557 | error_message) | |
23f44e6f ILT |
558 | bfd *abfd; |
559 | arelent *reloc_entry; | |
560 | asymbol *symbol; | |
561 | PTR data; | |
562 | asection *input_section; | |
563 | bfd *output_bfd; | |
4991ebb9 | 564 | char **error_message; |
23f44e6f ILT |
565 | { |
566 | boolean relocateable; | |
567 | bfd_vma relocation; | |
568 | unsigned long val; | |
569 | unsigned long insn; | |
570 | ||
571 | /* If we're relocating, and this is an external symbol with no | |
572 | addend, we don't want to change anything. We will only have an | |
573 | addend if this is a newly created reloc, not read from an ECOFF | |
574 | file. */ | |
575 | if (output_bfd != (bfd *) NULL | |
576 | && (symbol->flags & BSF_SECTION_SYM) == 0 | |
577 | && reloc_entry->addend == 0) | |
578 | { | |
579 | reloc_entry->address += input_section->output_offset; | |
580 | return bfd_reloc_ok; | |
581 | } | |
582 | ||
583 | if (output_bfd != (bfd *) NULL) | |
584 | relocateable = true; | |
585 | else | |
586 | { | |
587 | relocateable = false; | |
588 | output_bfd = symbol->section->output_section->owner; | |
589 | } | |
590 | ||
591 | if (symbol->section == &bfd_und_section | |
592 | && relocateable == false) | |
593 | return bfd_reloc_undefined; | |
594 | ||
595 | /* We have to figure out the gp value, so that we can adjust the | |
596 | symbol value correctly. We look up the symbol _gp in the output | |
597 | BFD. If we can't find it, we're stuck. We cache it in the ECOFF | |
598 | target data. We don't need to adjust the symbol value for an | |
599 | external symbol if we are producing relocateable output. */ | |
600 | if (ecoff_data (output_bfd)->gp == 0 | |
601 | && (relocateable == false | |
602 | || (symbol->flags & BSF_SECTION_SYM) != 0)) | |
603 | { | |
604 | if (relocateable != false) | |
605 | { | |
606 | /* Make up a value. */ | |
607 | ecoff_data (output_bfd)->gp = | |
608 | symbol->section->output_section->vma + 0x4000; | |
609 | } | |
610 | else | |
611 | { | |
612 | unsigned int count; | |
613 | asymbol **sym; | |
614 | unsigned int i; | |
615 | ||
616 | count = bfd_get_symcount (output_bfd); | |
617 | sym = bfd_get_outsymbols (output_bfd); | |
618 | ||
619 | if (sym == (asymbol **) NULL) | |
620 | i = count; | |
621 | else | |
622 | { | |
623 | for (i = 0; i < count; i++, sym++) | |
624 | { | |
625 | register CONST char *name; | |
626 | ||
627 | name = bfd_asymbol_name (*sym); | |
628 | if (*name == '_' && strcmp (name, "_gp") == 0) | |
629 | { | |
630 | ecoff_data (output_bfd)->gp = bfd_asymbol_value (*sym); | |
631 | break; | |
632 | } | |
633 | } | |
634 | } | |
635 | ||
636 | if (i >= count) | |
637 | { | |
638 | /* Only get the error once. */ | |
639 | ecoff_data (output_bfd)->gp = 4; | |
4991ebb9 ILT |
640 | *error_message = |
641 | (char *) "GP relative relocation when _gp not defined"; | |
23f44e6f ILT |
642 | return bfd_reloc_dangerous; |
643 | } | |
644 | } | |
645 | } | |
646 | ||
647 | if (bfd_is_com_section (symbol->section)) | |
648 | relocation = 0; | |
649 | else | |
650 | relocation = symbol->value; | |
651 | ||
652 | relocation += symbol->section->output_section->vma; | |
653 | relocation += symbol->section->output_offset; | |
654 | ||
655 | if (reloc_entry->address > input_section->_cooked_size) | |
656 | return bfd_reloc_outofrange; | |
657 | ||
658 | insn = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address); | |
659 | ||
660 | /* Set val to the offset into the section or symbol. */ | |
661 | val = ((insn & 0xffff) + reloc_entry->addend) & 0xffff; | |
662 | if (val & 0x8000) | |
663 | val -= 0x10000; | |
664 | ||
665 | /* Adjust val for the final section location and GP value. If we | |
666 | are producing relocateable output, we don't want to do this for | |
667 | an external symbol. */ | |
668 | if (relocateable == false | |
669 | || (symbol->flags & BSF_SECTION_SYM) != 0) | |
670 | val += relocation - ecoff_data (output_bfd)->gp; | |
671 | ||
672 | insn = (insn &~ 0xffff) | (val & 0xffff); | |
673 | bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address); | |
674 | ||
675 | if (relocateable != false) | |
676 | reloc_entry->address += input_section->output_offset; | |
677 | ||
678 | /* Make sure it fit in 16 bits. */ | |
679 | if (val >= 0x8000 && val < 0xffff8000) | |
4991ebb9 | 680 | return bfd_reloc_overflow; |
23f44e6f ILT |
681 | |
682 | return bfd_reloc_ok; | |
683 | } | |
684 | ||
685 | /* Get the howto structure for a generic reloc type. */ | |
686 | ||
687 | static CONST struct reloc_howto_struct * | |
688 | mips_bfd_reloc_type_lookup (abfd, code) | |
689 | bfd *abfd; | |
690 | bfd_reloc_code_real_type code; | |
691 | { | |
692 | int mips_type; | |
693 | ||
694 | switch (code) | |
695 | { | |
696 | case BFD_RELOC_16: | |
697 | mips_type = MIPS_R_REFHALF; | |
698 | break; | |
699 | case BFD_RELOC_32: | |
700 | mips_type = MIPS_R_REFWORD; | |
701 | break; | |
702 | case BFD_RELOC_MIPS_JMP: | |
703 | mips_type = MIPS_R_JMPADDR; | |
704 | break; | |
705 | case BFD_RELOC_HI16_S: | |
706 | mips_type = MIPS_R_REFHI; | |
707 | break; | |
708 | case BFD_RELOC_LO16: | |
709 | mips_type = MIPS_R_REFLO; | |
710 | break; | |
711 | case BFD_RELOC_MIPS_GPREL: | |
712 | mips_type = MIPS_R_GPREL; | |
713 | break; | |
4991ebb9 ILT |
714 | case BFD_RELOC_MIPS_LITERAL: |
715 | mips_type = MIPS_R_LITERAL; | |
716 | break; | |
23f44e6f ILT |
717 | default: |
718 | return (CONST struct reloc_howto_struct *) NULL; | |
719 | } | |
720 | ||
721 | return &mips_howto_table[mips_type]; | |
722 | } | |
c3fe0c41 | 723 | \f |
4991ebb9 ILT |
724 | /* A helper routine for mips_relocate_section which handles the REFHI |
725 | relocation. The REFHI relocation must be followed by a REFLO | |
726 | relocation, and the addend used is formed from the addends of both | |
727 | instructions. */ | |
de17306e | 728 | |
4991ebb9 ILT |
729 | static void |
730 | mips_relocate_refhi (refhi, reflo, input_bfd, input_section, contents, | |
731 | relocation) | |
732 | struct internal_reloc *refhi; | |
733 | struct internal_reloc *reflo; | |
734 | bfd *input_bfd; | |
735 | asection *input_section; | |
736 | bfd_byte *contents; | |
737 | bfd_vma relocation; | |
de17306e | 738 | { |
4991ebb9 ILT |
739 | unsigned long insn; |
740 | unsigned long val; | |
741 | unsigned long vallo; | |
742 | ||
743 | insn = bfd_get_32 (input_bfd, | |
744 | contents + refhi->r_vaddr - input_section->vma); | |
745 | vallo = (bfd_get_32 (input_bfd, | |
746 | contents + reflo->r_vaddr - input_section->vma) | |
747 | & 0xffff); | |
748 | val = ((insn & 0xffff) << 16) + vallo; | |
749 | val += relocation; | |
750 | ||
751 | /* The low order 16 bits are always treated as a signed value. | |
752 | Therefore, a negative value in the low order bits requires an | |
753 | adjustment in the high order bits. We need to make this | |
754 | adjustment in two ways: once for the bits we took from the data, | |
755 | and once for the bits we are putting back in to the data. */ | |
756 | if ((vallo & 0x8000) != 0) | |
757 | val -= 0x10000; | |
758 | if ((val & 0x8000) != 0) | |
759 | val += 0x10000; | |
de17306e | 760 | |
4991ebb9 ILT |
761 | insn = (insn &~ 0xffff) | ((val >> 16) & 0xffff); |
762 | bfd_put_32 (input_bfd, (bfd_vma) insn, | |
763 | contents + refhi->r_vaddr - input_section->vma); | |
764 | } | |
de17306e | 765 | |
4991ebb9 | 766 | /* Relocate a section while linking a MIPS ECOFF file. */ |
de17306e | 767 | |
4991ebb9 ILT |
768 | static boolean |
769 | mips_relocate_section (output_bfd, info, input_bfd, input_section, | |
770 | contents, external_relocs) | |
771 | bfd *output_bfd; | |
772 | struct bfd_link_info *info; | |
773 | bfd *input_bfd; | |
774 | asection *input_section; | |
775 | bfd_byte *contents; | |
776 | PTR external_relocs; | |
777 | { | |
778 | asection **symndx_to_section; | |
779 | struct ecoff_link_hash_entry **sym_hashes; | |
780 | bfd_vma gp; | |
781 | boolean gp_undefined; | |
782 | struct external_reloc *ext_rel; | |
783 | struct external_reloc *ext_rel_end; | |
784 | boolean got_reflo; | |
785 | ||
786 | BFD_ASSERT (input_bfd->xvec->header_byteorder_big_p | |
787 | == output_bfd->xvec->header_byteorder_big_p); | |
788 | ||
789 | /* We keep a table mapping the symndx found in an internal reloc to | |
790 | the appropriate section. This is faster than looking up the | |
791 | section by name each time. */ | |
792 | symndx_to_section = ecoff_data (input_bfd)->symndx_to_section; | |
793 | if (symndx_to_section == (asection **) NULL) | |
794 | { | |
795 | symndx_to_section = ((asection **) | |
796 | bfd_alloc (input_bfd, | |
797 | (NUM_RELOC_SECTIONS | |
798 | * sizeof (asection *)))); | |
799 | ||
800 | symndx_to_section[RELOC_SECTION_NONE] = NULL; | |
801 | symndx_to_section[RELOC_SECTION_TEXT] = | |
802 | bfd_get_section_by_name (input_bfd, ".text"); | |
803 | symndx_to_section[RELOC_SECTION_RDATA] = | |
804 | bfd_get_section_by_name (input_bfd, ".rdata"); | |
805 | symndx_to_section[RELOC_SECTION_DATA] = | |
806 | bfd_get_section_by_name (input_bfd, ".data"); | |
807 | symndx_to_section[RELOC_SECTION_SDATA] = | |
808 | bfd_get_section_by_name (input_bfd, ".sdata"); | |
809 | symndx_to_section[RELOC_SECTION_SBSS] = | |
810 | bfd_get_section_by_name (input_bfd, ".sbss"); | |
811 | symndx_to_section[RELOC_SECTION_BSS] = | |
812 | bfd_get_section_by_name (input_bfd, ".bss"); | |
813 | symndx_to_section[RELOC_SECTION_INIT] = | |
814 | bfd_get_section_by_name (input_bfd, ".init"); | |
815 | symndx_to_section[RELOC_SECTION_LIT8] = | |
816 | bfd_get_section_by_name (input_bfd, ".lit8"); | |
817 | symndx_to_section[RELOC_SECTION_LIT4] = | |
818 | bfd_get_section_by_name (input_bfd, ".lit4"); | |
819 | symndx_to_section[RELOC_SECTION_XDATA] = NULL; | |
820 | symndx_to_section[RELOC_SECTION_PDATA] = NULL; | |
821 | symndx_to_section[RELOC_SECTION_FINI] = | |
822 | bfd_get_section_by_name (input_bfd, ".fini"); | |
823 | symndx_to_section[RELOC_SECTION_LITA] = NULL; | |
824 | symndx_to_section[RELOC_SECTION_ABS] = NULL; | |
825 | ||
826 | ecoff_data (input_bfd)->symndx_to_section = symndx_to_section; | |
827 | } | |
de17306e | 828 | |
4991ebb9 | 829 | sym_hashes = ecoff_data (input_bfd)->sym_hashes; |
de17306e | 830 | |
4991ebb9 ILT |
831 | gp = ecoff_data (output_bfd)->gp; |
832 | if (gp == 0) | |
833 | gp_undefined = true; | |
834 | else | |
835 | gp_undefined = false; | |
de17306e | 836 | |
4991ebb9 | 837 | got_reflo = false; |
de17306e | 838 | |
4991ebb9 ILT |
839 | ext_rel = (struct external_reloc *) external_relocs; |
840 | ext_rel_end = ext_rel + input_section->reloc_count; | |
841 | for (; ext_rel < ext_rel_end; ext_rel++) | |
842 | { | |
843 | struct internal_reloc int_rel; | |
844 | struct internal_reloc reflo_int_rel; | |
845 | bfd_vma addend; | |
846 | reloc_howto_type *howto; | |
847 | struct ecoff_link_hash_entry *h = NULL; | |
848 | asection *s = NULL; | |
849 | bfd_vma relocation; | |
850 | bfd_reloc_status_type r; | |
851 | ||
852 | if (! got_reflo) | |
853 | mips_ecoff_swap_reloc_in (input_bfd, (PTR) ext_rel, &int_rel); | |
854 | else | |
855 | { | |
856 | int_rel = reflo_int_rel; | |
857 | got_reflo = false; | |
858 | } | |
de17306e | 859 | |
4991ebb9 ILT |
860 | BFD_ASSERT (int_rel.r_type |
861 | < sizeof mips_howto_table / sizeof mips_howto_table[0]); | |
de17306e | 862 | |
4991ebb9 ILT |
863 | /* The REFHI reloc requires special handling. It must be |
864 | followed by a REFLO reloc, and the addend is formed from both | |
865 | fields. */ | |
866 | if (int_rel.r_type == MIPS_R_REFHI) | |
867 | { | |
868 | BFD_ASSERT ((ext_rel + 1) < ext_rel_end); | |
869 | mips_ecoff_swap_reloc_in (input_bfd, (PTR) (ext_rel + 1), | |
870 | &reflo_int_rel); | |
871 | BFD_ASSERT (reflo_int_rel.r_type == MIPS_R_REFLO | |
872 | && int_rel.r_extern == reflo_int_rel.r_extern | |
873 | && int_rel.r_symndx == reflo_int_rel.r_symndx); | |
874 | got_reflo = true; | |
875 | } | |
de17306e | 876 | |
4991ebb9 | 877 | howto = &mips_howto_table[int_rel.r_type]; |
de17306e | 878 | |
4991ebb9 ILT |
879 | if (int_rel.r_extern) |
880 | { | |
881 | h = sym_hashes[int_rel.r_symndx]; | |
882 | /* If h is NULL, that means that there is a reloc against an | |
883 | external symbol which we thought was just a debugging | |
884 | symbol. This should not happen. */ | |
885 | if (h == (struct ecoff_link_hash_entry *) NULL) | |
886 | abort (); | |
887 | } | |
888 | else | |
889 | { | |
890 | if (int_rel.r_symndx < 0 || int_rel.r_symndx >= NUM_RELOC_SECTIONS) | |
891 | s = NULL; | |
892 | else | |
893 | s = symndx_to_section[int_rel.r_symndx]; | |
de17306e | 894 | |
4991ebb9 ILT |
895 | if (s == (asection *) NULL) |
896 | abort (); | |
897 | } | |
de17306e | 898 | |
4991ebb9 ILT |
899 | /* The GPREL reloc uses an addend: the difference in the GP |
900 | values. */ | |
901 | if (int_rel.r_type != MIPS_R_GPREL) | |
902 | addend = 0; | |
903 | else | |
de17306e | 904 | { |
4991ebb9 ILT |
905 | if (gp_undefined) |
906 | { | |
907 | if (! ((*info->callbacks->reloc_dangerous) | |
908 | (info, "GP relative relocation when GP not defined", | |
909 | input_bfd, input_section, | |
910 | int_rel.r_vaddr - input_section->vma))) | |
911 | return false; | |
912 | /* Only give the error once per link. */ | |
913 | ecoff_data (output_bfd)->gp = gp = 4; | |
914 | gp_undefined = false; | |
915 | } | |
916 | if (! int_rel.r_extern) | |
917 | { | |
918 | /* This is a relocation against a section. The current | |
919 | addend in the instruction is the difference between | |
920 | INPUT_SECTION->vma and the GP value of INPUT_BFD. We | |
921 | must change this to be the difference between the | |
922 | final definition (which will end up in RELOCATION) | |
923 | and the GP value of OUTPUT_BFD (which is in GP). */ | |
924 | addend = ecoff_data (input_bfd)->gp - gp; | |
925 | } | |
926 | else if (! info->relocateable | |
927 | || h->root.type == bfd_link_hash_defined) | |
928 | { | |
929 | /* This is a relocation against an undefined or common | |
930 | symbol. The current addend in the instruction is | |
931 | simply the desired offset into the symbol (normally | |
932 | zero). We are going to change this into a relocation | |
933 | against a defined symbol, so we want the instruction | |
934 | to hold the difference between the final definition | |
935 | of the symbol (which will end up in RELOCATION) and | |
936 | the GP value of OUTPUT_BFD (which is in GP). */ | |
937 | addend = - gp; | |
938 | } | |
939 | else | |
940 | { | |
941 | /* This is a relocation against an undefined or common | |
942 | symbol. The current addend in the instruction is | |
943 | simply the desired offset into the symbol (normally | |
944 | zero). We are generating relocateable output, and we | |
945 | aren't going to define this symbol, so we just leave | |
946 | the instruction alone. */ | |
947 | addend = 0; | |
948 | } | |
de17306e ILT |
949 | } |
950 | ||
4991ebb9 ILT |
951 | if (info->relocateable) |
952 | { | |
953 | /* We are generating relocateable output, and must convert | |
954 | the existing reloc. */ | |
955 | if (int_rel.r_extern) | |
956 | { | |
957 | if (h->root.type == bfd_link_hash_defined) | |
958 | { | |
959 | asection *hsec; | |
960 | const char *name; | |
de17306e | 961 | |
4991ebb9 ILT |
962 | /* This symbol is defined in the output. Convert |
963 | the reloc from being against the symbol to being | |
964 | against the section. */ | |
de17306e | 965 | |
4991ebb9 ILT |
966 | /* Clear the r_extern bit. */ |
967 | int_rel.r_extern = 0; | |
de17306e | 968 | |
4991ebb9 ILT |
969 | /* Compute a new r_symndx value. */ |
970 | hsec = h->root.u.def.section; | |
971 | name = bfd_get_section_name (output_bfd, | |
972 | hsec->output_section); | |
de17306e | 973 | |
4991ebb9 ILT |
974 | int_rel.r_symndx = -1; |
975 | switch (name[1]) | |
976 | { | |
977 | case 'b': | |
978 | if (strcmp (name, ".bss") == 0) | |
979 | int_rel.r_symndx = RELOC_SECTION_BSS; | |
980 | break; | |
981 | case 'd': | |
982 | if (strcmp (name, ".data") == 0) | |
983 | int_rel.r_symndx = RELOC_SECTION_DATA; | |
984 | break; | |
985 | case 'f': | |
986 | if (strcmp (name, ".fini") == 0) | |
987 | int_rel.r_symndx = RELOC_SECTION_FINI; | |
988 | break; | |
989 | case 'i': | |
990 | if (strcmp (name, ".init") == 0) | |
991 | int_rel.r_symndx = RELOC_SECTION_INIT; | |
992 | break; | |
993 | case 'l': | |
994 | if (strcmp (name, ".lit8") == 0) | |
995 | int_rel.r_symndx = RELOC_SECTION_LIT8; | |
996 | else if (strcmp (name, ".lit4") == 0) | |
997 | int_rel.r_symndx = RELOC_SECTION_LIT4; | |
998 | break; | |
999 | case 'r': | |
1000 | if (strcmp (name, ".rdata") == 0) | |
1001 | int_rel.r_symndx = RELOC_SECTION_RDATA; | |
1002 | break; | |
1003 | case 's': | |
1004 | if (strcmp (name, ".sdata") == 0) | |
1005 | int_rel.r_symndx = RELOC_SECTION_SDATA; | |
1006 | else if (strcmp (name, ".sbss") == 0) | |
1007 | int_rel.r_symndx = RELOC_SECTION_SBSS; | |
1008 | break; | |
1009 | case 't': | |
1010 | if (strcmp (name, ".text") == 0) | |
1011 | int_rel.r_symndx = RELOC_SECTION_TEXT; | |
1012 | break; | |
1013 | } | |
1014 | ||
1015 | if (int_rel.r_symndx == -1) | |
1016 | abort (); | |
1017 | ||
1018 | /* Add the section VMA and the symbol value. */ | |
1019 | relocation = (h->root.u.def.value | |
1020 | + hsec->output_section->vma | |
1021 | + hsec->output_offset); | |
1022 | } | |
1023 | else | |
1024 | { | |
1025 | /* Change the symndx value to the right one for the | |
1026 | output BFD. */ | |
1027 | int_rel.r_symndx = h->indx; | |
1028 | if (int_rel.r_symndx == -1) | |
1029 | { | |
1030 | /* This symbol is not being written out. */ | |
1031 | if (! ((*info->callbacks->unattached_reloc) | |
1032 | (info, h->root.root.string, input_bfd, | |
1033 | input_section, | |
1034 | int_rel.r_vaddr - input_section->vma))) | |
1035 | return false; | |
1036 | int_rel.r_symndx = 0; | |
1037 | } | |
1038 | relocation = 0; | |
1039 | } | |
1040 | } | |
1041 | else | |
1042 | { | |
1043 | /* This is a relocation against a section. Adjust the | |
1044 | value by the amount the section moved. */ | |
1045 | relocation = (s->output_section->vma | |
1046 | + s->output_offset | |
1047 | - s->vma); | |
1048 | } | |
de17306e | 1049 | |
4991ebb9 | 1050 | relocation += addend; |
de17306e | 1051 | |
4991ebb9 ILT |
1052 | /* Adjust the contents. */ |
1053 | if (relocation == 0) | |
1054 | r = bfd_reloc_ok; | |
1055 | else | |
1056 | { | |
1057 | if (int_rel.r_type != MIPS_R_REFHI) | |
1058 | r = _bfd_relocate_contents (howto, input_bfd, relocation, | |
1059 | (contents | |
1060 | + int_rel.r_vaddr | |
1061 | - input_section->vma)); | |
1062 | else | |
1063 | { | |
1064 | mips_relocate_refhi (&int_rel, &reflo_int_rel, | |
1065 | input_bfd, input_section, contents, | |
1066 | relocation); | |
1067 | r = bfd_reloc_ok; | |
1068 | } | |
1069 | } | |
de17306e | 1070 | |
4991ebb9 ILT |
1071 | /* Adjust the reloc address. */ |
1072 | int_rel.r_vaddr += (input_section->output_section->vma | |
1073 | + input_section->output_offset | |
1074 | - input_section->vma); | |
de17306e | 1075 | |
4991ebb9 ILT |
1076 | /* Save the changed reloc information. */ |
1077 | mips_ecoff_swap_reloc_out (input_bfd, &int_rel, (PTR) ext_rel); | |
1078 | } | |
1079 | else | |
1080 | { | |
1081 | /* We are producing a final executable. */ | |
1082 | if (int_rel.r_extern) | |
1083 | { | |
1084 | /* This is a reloc against a symbol. */ | |
1085 | if (h->root.type == bfd_link_hash_defined) | |
1086 | { | |
1087 | asection *hsec; | |
de17306e | 1088 | |
4991ebb9 ILT |
1089 | hsec = h->root.u.def.section; |
1090 | relocation = (h->root.u.def.value | |
1091 | + hsec->output_section->vma | |
1092 | + hsec->output_offset); | |
1093 | } | |
1094 | else | |
1095 | { | |
1096 | if (! ((*info->callbacks->undefined_symbol) | |
1097 | (info, h->root.root.string, input_bfd, | |
1098 | input_section, | |
1099 | int_rel.r_vaddr - input_section->vma))) | |
1100 | return false; | |
1101 | relocation = 0; | |
1102 | } | |
1103 | } | |
1104 | else | |
1105 | { | |
1106 | /* This is a reloc against a section. */ | |
1107 | relocation = (s->output_section->vma | |
1108 | + s->output_offset | |
1109 | - s->vma); | |
1110 | ||
1111 | /* Adjust a PC relative relocation by removing the | |
1112 | reference to the original source section. */ | |
1113 | if (howto->pc_relative) | |
1114 | relocation += input_section->vma; | |
1115 | } | |
de17306e | 1116 | |
4991ebb9 ILT |
1117 | if (int_rel.r_type != MIPS_R_REFHI) |
1118 | r = _bfd_final_link_relocate (howto, | |
1119 | input_bfd, | |
1120 | input_section, | |
1121 | contents, | |
1122 | int_rel.r_vaddr - input_section->vma, | |
1123 | relocation, | |
1124 | addend); | |
1125 | else | |
1126 | { | |
1127 | mips_relocate_refhi (&int_rel, &reflo_int_rel, input_bfd, | |
1128 | input_section, contents, relocation); | |
1129 | r = bfd_reloc_ok; | |
1130 | } | |
1131 | } | |
1132 | ||
1133 | if (r != bfd_reloc_ok) | |
1134 | { | |
1135 | switch (r) | |
1136 | { | |
1137 | default: | |
1138 | case bfd_reloc_outofrange: | |
1139 | abort (); | |
1140 | case bfd_reloc_overflow: | |
1141 | { | |
1142 | const char *name; | |
1143 | ||
1144 | if (int_rel.r_extern) | |
1145 | name = h->root.root.string; | |
1146 | else | |
1147 | name = bfd_section_name (input_bfd, s); | |
1148 | if (! ((*info->callbacks->reloc_overflow) | |
1149 | (info, name, howto->name, (bfd_vma) 0, | |
1150 | input_bfd, input_section, | |
1151 | int_rel.r_vaddr - input_section->vma))) | |
1152 | return false; | |
1153 | } | |
1154 | break; | |
1155 | } | |
1156 | } | |
1157 | } | |
1158 | ||
1159 | return true; | |
de17306e | 1160 | } |
de17306e | 1161 | \f |
23f44e6f ILT |
1162 | /* This is the ECOFF backend structure. The backend field of the |
1163 | target vector points to this. */ | |
1164 | ||
1165 | static const struct ecoff_backend_data mips_ecoff_backend_data = | |
1166 | { | |
1167 | /* COFF backend structure. */ | |
1168 | { | |
1169 | (void (*) PARAMS ((bfd *,PTR,int,int,PTR))) bfd_void, /* aux_in */ | |
1170 | (void (*) PARAMS ((bfd *,PTR,PTR))) bfd_void, /* sym_in */ | |
1171 | (void (*) PARAMS ((bfd *,PTR,PTR))) bfd_void, /* lineno_in */ | |
1172 | (unsigned (*) PARAMS ((bfd *,PTR,int,int,PTR))) bfd_void, /* aux_out */ | |
1173 | (unsigned (*) PARAMS ((bfd *,PTR,PTR))) bfd_void, /* sym_out */ | |
1174 | (unsigned (*) PARAMS ((bfd *,PTR,PTR))) bfd_void, /* lineno_out */ | |
1175 | (unsigned (*) PARAMS ((bfd *,PTR,PTR))) bfd_void, /* reloc_out */ | |
1176 | mips_ecoff_swap_filehdr_out, mips_ecoff_swap_aouthdr_out, | |
1177 | mips_ecoff_swap_scnhdr_out, | |
1178 | FILHSZ, AOUTSZ, SCNHSZ, 0, 0, 0, true, | |
1179 | mips_ecoff_swap_filehdr_in, mips_ecoff_swap_aouthdr_in, | |
1180 | mips_ecoff_swap_scnhdr_in, mips_ecoff_bad_format_hook, | |
5fa2aaa2 | 1181 | ecoff_set_arch_mach_hook, ecoff_mkobject_hook, |
23f44e6f ILT |
1182 | ecoff_styp_to_sec_flags, ecoff_make_section_hook, ecoff_set_alignment_hook, |
1183 | ecoff_slurp_symbol_table, NULL, NULL | |
1184 | }, | |
1185 | /* Supported architecture. */ | |
1186 | bfd_arch_mips, | |
23f44e6f ILT |
1187 | /* Initial portion of armap string. */ |
1188 | "__________", | |
23f44e6f ILT |
1189 | /* The page boundary used to align sections in a demand-paged |
1190 | executable file. E.g., 0x1000. */ | |
1191 | 0x1000, | |
5fa2aaa2 ILT |
1192 | /* True if the .rdata section is part of the text segment, as on the |
1193 | Alpha. False if .rdata is part of the data segment, as on the | |
1194 | MIPS. */ | |
1195 | false, | |
23f44e6f ILT |
1196 | /* Bitsize of constructor entries. */ |
1197 | 32, | |
1198 | /* Reloc to use for constructor entries. */ | |
1199 | &mips_howto_table[MIPS_R_REFWORD], | |
4991ebb9 ILT |
1200 | { |
1201 | /* Symbol table magic number. */ | |
1202 | magicSym, | |
1203 | /* Alignment of debugging information. E.g., 4. */ | |
1204 | 4, | |
1205 | /* Sizes of external symbolic information. */ | |
1206 | sizeof (struct hdr_ext), | |
1207 | sizeof (struct dnr_ext), | |
1208 | sizeof (struct pdr_ext), | |
1209 | sizeof (struct sym_ext), | |
1210 | sizeof (struct opt_ext), | |
1211 | sizeof (struct fdr_ext), | |
1212 | sizeof (struct rfd_ext), | |
1213 | sizeof (struct ext_ext), | |
1214 | /* Functions to swap in external symbolic data. */ | |
1215 | ecoff_swap_hdr_in, | |
1216 | ecoff_swap_dnr_in, | |
1217 | ecoff_swap_pdr_in, | |
1218 | ecoff_swap_sym_in, | |
1219 | ecoff_swap_opt_in, | |
1220 | ecoff_swap_fdr_in, | |
1221 | ecoff_swap_rfd_in, | |
1222 | ecoff_swap_ext_in, | |
1223 | /* Functions to swap out external symbolic data. */ | |
1224 | ecoff_swap_hdr_out, | |
1225 | ecoff_swap_dnr_out, | |
1226 | ecoff_swap_pdr_out, | |
1227 | ecoff_swap_sym_out, | |
1228 | ecoff_swap_opt_out, | |
1229 | ecoff_swap_fdr_out, | |
1230 | ecoff_swap_rfd_out, | |
1231 | ecoff_swap_ext_out | |
1232 | }, | |
23f44e6f ILT |
1233 | /* External reloc size. */ |
1234 | RELSZ, | |
1235 | /* Reloc swapping functions. */ | |
1236 | mips_ecoff_swap_reloc_in, | |
1237 | mips_ecoff_swap_reloc_out, | |
1238 | /* Backend reloc tweaking. */ | |
5fa2aaa2 | 1239 | mips_adjust_reloc_in, |
4991ebb9 ILT |
1240 | mips_adjust_reloc_out, |
1241 | /* Relocate section contents while linking. */ | |
1242 | mips_relocate_section | |
515c4292 ILT |
1243 | }; |
1244 | ||
23f44e6f ILT |
1245 | /* Looking up a reloc type is MIPS specific. */ |
1246 | #define ecoff_bfd_reloc_type_lookup mips_bfd_reloc_type_lookup | |
1247 | ||
5fa2aaa2 ILT |
1248 | /* Getting relocated section contents is generic. */ |
1249 | #define ecoff_bfd_get_relocated_section_contents \ | |
1250 | bfd_generic_get_relocated_section_contents | |
1251 | ||
4991ebb9 ILT |
1252 | /* Core file support is usually traditional (but note that Irix uses |
1253 | irix-core.c). */ | |
1254 | #define ecoff_core_file_p _bfd_dummy_target | |
1255 | #define ecoff_core_file_failing_command _bfd_dummy_core_file_failing_command | |
1256 | #define ecoff_core_file_failing_signal _bfd_dummy_core_file_failing_signal | |
1257 | #define ecoff_core_file_matches_executable_p \ | |
1258 | _bfd_dummy_core_file_matches_executable_p | |
1259 | ||
1327fb29 | 1260 | bfd_target ecoff_little_vec = |
294eaca4 SC |
1261 | { |
1262 | "ecoff-littlemips", /* name */ | |
515c4292 | 1263 | bfd_target_ecoff_flavour, |
294eaca4 SC |
1264 | false, /* data byte order is little */ |
1265 | false, /* header byte order is little */ | |
1266 | ||
1267 | (HAS_RELOC | EXEC_P | /* object flags */ | |
1268 | HAS_LINENO | HAS_DEBUG | | |
4991ebb9 | 1269 | HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED), |
294eaca4 SC |
1270 | |
1271 | (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* sect | |
1272 | flags */ | |
1273 | 0, /* leading underscore */ | |
de17306e | 1274 | ' ', /* ar_pad_char */ |
294eaca4 | 1275 | 15, /* ar_max_namelen */ |
de17306e | 1276 | 4, /* minimum alignment power */ |
23f44e6f ILT |
1277 | bfd_getl64, bfd_getl_signed_64, bfd_putl64, |
1278 | bfd_getl32, bfd_getl_signed_32, bfd_putl32, | |
1279 | bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* data */ | |
1280 | bfd_getl64, bfd_getl_signed_64, bfd_putl64, | |
1281 | bfd_getl32, bfd_getl_signed_32, bfd_putl32, | |
1282 | bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* hdrs */ | |
294eaca4 | 1283 | |
515c4292 | 1284 | {_bfd_dummy_target, coff_object_p, /* bfd_check_format */ |
c3fe0c41 | 1285 | ecoff_archive_p, _bfd_dummy_target}, |
23f44e6f | 1286 | {bfd_false, ecoff_mkobject, /* bfd_set_format */ |
dae31cf5 | 1287 | _bfd_generic_mkarchive, bfd_false}, |
c3fe0c41 ILT |
1288 | {bfd_false, ecoff_write_object_contents, /* bfd_write_contents */ |
1289 | _bfd_write_archive_contents, bfd_false}, | |
515c4292 | 1290 | JUMP_TABLE (ecoff), |
23f44e6f | 1291 | (PTR) &mips_ecoff_backend_data |
515c4292 | 1292 | }; |
1327fb29 SC |
1293 | |
1294 | bfd_target ecoff_big_vec = | |
294eaca4 SC |
1295 | { |
1296 | "ecoff-bigmips", /* name */ | |
515c4292 | 1297 | bfd_target_ecoff_flavour, |
294eaca4 SC |
1298 | true, /* data byte order is big */ |
1299 | true, /* header byte order is big */ | |
1300 | ||
1301 | (HAS_RELOC | EXEC_P | /* object flags */ | |
1302 | HAS_LINENO | HAS_DEBUG | | |
4991ebb9 | 1303 | HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED), |
294eaca4 SC |
1304 | |
1305 | (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* sect flags */ | |
1306 | 0, /* leading underscore */ | |
1307 | ' ', /* ar_pad_char */ | |
de17306e ILT |
1308 | 15, /* ar_max_namelen */ |
1309 | 4, /* minimum alignment power */ | |
23f44e6f ILT |
1310 | bfd_getb64, bfd_getb_signed_64, bfd_putb64, |
1311 | bfd_getb32, bfd_getb_signed_32, bfd_putb32, | |
1312 | bfd_getb16, bfd_getb_signed_16, bfd_putb16, | |
1313 | bfd_getb64, bfd_getb_signed_64, bfd_putb64, | |
1314 | bfd_getb32, bfd_getb_signed_32, bfd_putb32, | |
1315 | bfd_getb16, bfd_getb_signed_16, bfd_putb16, | |
294eaca4 | 1316 | {_bfd_dummy_target, coff_object_p, /* bfd_check_format */ |
de17306e | 1317 | ecoff_archive_p, ecoff_core_file_p}, |
23f44e6f | 1318 | {bfd_false, ecoff_mkobject, /* bfd_set_format */ |
dae31cf5 | 1319 | _bfd_generic_mkarchive, bfd_false}, |
515c4292 | 1320 | {bfd_false, ecoff_write_object_contents, /* bfd_write_contents */ |
c3fe0c41 | 1321 | _bfd_write_archive_contents, bfd_false}, |
515c4292 | 1322 | JUMP_TABLE(ecoff), |
23f44e6f | 1323 | (PTR) &mips_ecoff_backend_data |
515c4292 ILT |
1324 | /* Note that there is another bfd_target just above this one. If |
1325 | you are adding initializers here, you should be adding them there | |
1326 | as well. */ | |
1327 | }; |