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" |
1327fb29 | 24 | #include "libbfd.h" |
8fa0d3a0 | 25 | #include "seclet.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 ILT |
36 | static boolean mips_ecoff_bad_format_hook PARAMS ((bfd *abfd, PTR filehdr)); |
37 | static PTR mips_ecoff_mkobject_hook PARAMS ((bfd *abfd, PTR filehdr, | |
38 | PTR aouthdr)); | |
39 | static void mips_ecoff_swap_reloc_in PARAMS ((bfd *, PTR, | |
40 | struct internal_reloc *)); | |
41 | static void mips_ecoff_swap_reloc_out PARAMS ((bfd *, | |
42 | const struct internal_reloc *, | |
43 | PTR)); | |
23f44e6f ILT |
44 | static bfd_reloc_status_type mips_generic_reloc PARAMS ((bfd *abfd, |
45 | arelent *reloc, | |
46 | asymbol *symbol, | |
47 | PTR data, | |
48 | asection *section, | |
49 | bfd *output_bfd)); | |
50 | static bfd_reloc_status_type mips_refhi_reloc PARAMS ((bfd *abfd, | |
51 | arelent *reloc, | |
52 | asymbol *symbol, | |
53 | PTR data, | |
54 | asection *section, | |
55 | bfd *output_bfd)); | |
56 | static bfd_reloc_status_type mips_reflo_reloc PARAMS ((bfd *abfd, | |
57 | arelent *reloc, | |
58 | asymbol *symbol, | |
59 | PTR data, | |
60 | asection *section, | |
61 | bfd *output_bfd)); | |
62 | static bfd_reloc_status_type mips_gprel_reloc PARAMS ((bfd *abfd, | |
63 | arelent *reloc, | |
64 | asymbol *symbol, | |
65 | PTR data, | |
66 | asection *section, | |
67 | bfd *output_bfd)); | |
dae31cf5 | 68 | \f |
dae31cf5 ILT |
69 | /* ECOFF has COFF sections, but the debugging information is stored in |
70 | a completely different format. ECOFF targets use some of the | |
71 | swapping routines from coffswap.h, and some of the generic COFF | |
72 | routines in coffgen.c, but, unlike the real COFF targets, do not | |
73 | use coffcode.h itself. | |
8fa0d3a0 | 74 | |
dae31cf5 | 75 | Get the generic COFF swapping routines, except for the reloc, |
23f44e6f | 76 | symbol, and lineno ones. Give them ECOFF names. */ |
dae31cf5 ILT |
77 | #define MIPSECOFF |
78 | #define NO_COFF_RELOCS | |
79 | #define NO_COFF_SYMBOLS | |
80 | #define NO_COFF_LINENOS | |
81 | #define coff_swap_filehdr_in mips_ecoff_swap_filehdr_in | |
82 | #define coff_swap_filehdr_out mips_ecoff_swap_filehdr_out | |
83 | #define coff_swap_aouthdr_in mips_ecoff_swap_aouthdr_in | |
84 | #define coff_swap_aouthdr_out mips_ecoff_swap_aouthdr_out | |
85 | #define coff_swap_scnhdr_in mips_ecoff_swap_scnhdr_in | |
86 | #define coff_swap_scnhdr_out mips_ecoff_swap_scnhdr_out | |
87 | #include "coffswap.h" | |
8fa0d3a0 | 88 | |
dae31cf5 ILT |
89 | /* Get the ECOFF swapping routines. */ |
90 | #define ECOFF_32 | |
91 | #include "ecoffswap.h" | |
92 | \f | |
23f44e6f | 93 | /* How to process the various relocs types. */ |
dae31cf5 | 94 | |
23f44e6f | 95 | static reloc_howto_type mips_howto_table[] = |
dae31cf5 | 96 | { |
23f44e6f ILT |
97 | /* Reloc type 0 is ignored. The reloc reading code ensures that |
98 | this is a reference to the .abs section, which will cause | |
99 | bfd_perform_relocation to do nothing. */ | |
100 | HOWTO (MIPS_R_IGNORE, /* type */ | |
101 | 0, /* rightshift */ | |
102 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
103 | 8, /* bitsize */ | |
104 | false, /* pc_relative */ | |
105 | 0, /* bitpos */ | |
106 | complain_overflow_dont, /* complain_on_overflow */ | |
107 | 0, /* special_function */ | |
108 | "IGNORE", /* name */ | |
109 | false, /* partial_inplace */ | |
110 | 0, /* src_mask */ | |
111 | 0, /* dst_mask */ | |
112 | false), /* pcrel_offset */ | |
113 | ||
114 | /* A 16 bit reference to a symbol, normally from a data section. */ | |
115 | HOWTO (MIPS_R_REFHALF, /* type */ | |
116 | 0, /* rightshift */ | |
117 | 1, /* size (0 = byte, 1 = short, 2 = long) */ | |
118 | 16, /* bitsize */ | |
119 | false, /* pc_relative */ | |
120 | 0, /* bitpos */ | |
121 | complain_overflow_bitfield, /* complain_on_overflow */ | |
122 | mips_generic_reloc, /* special_function */ | |
123 | "REFHALF", /* name */ | |
124 | true, /* partial_inplace */ | |
125 | 0xffff, /* src_mask */ | |
126 | 0xffff, /* dst_mask */ | |
127 | false), /* pcrel_offset */ | |
128 | ||
129 | /* A 32 bit reference to a symbol, normally from a data section. */ | |
130 | HOWTO (MIPS_R_REFWORD, /* type */ | |
131 | 0, /* rightshift */ | |
132 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
133 | 32, /* bitsize */ | |
134 | false, /* pc_relative */ | |
135 | 0, /* bitpos */ | |
136 | complain_overflow_bitfield, /* complain_on_overflow */ | |
137 | mips_generic_reloc, /* special_function */ | |
138 | "REFWORD", /* name */ | |
139 | true, /* partial_inplace */ | |
140 | 0xffffffff, /* src_mask */ | |
141 | 0xffffffff, /* dst_mask */ | |
142 | false), /* pcrel_offset */ | |
143 | ||
144 | /* A 26 bit absolute jump address. */ | |
145 | HOWTO (MIPS_R_JMPADDR, /* type */ | |
146 | 2, /* rightshift */ | |
147 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
148 | 26, /* bitsize */ | |
149 | false, /* pc_relative */ | |
150 | 0, /* bitpos */ | |
151 | complain_overflow_bitfield, /* complain_on_overflow */ | |
152 | mips_generic_reloc, /* special_function */ | |
153 | "JMPADDR", /* name */ | |
154 | true, /* partial_inplace */ | |
155 | 0x3ffffff, /* src_mask */ | |
156 | 0x3ffffff, /* dst_mask */ | |
157 | false), /* pcrel_offset */ | |
158 | ||
159 | /* The high 16 bits of a symbol value. Handled by the function | |
160 | mips_refhi_reloc. */ | |
161 | HOWTO (MIPS_R_REFHI, /* type */ | |
162 | 16, /* rightshift */ | |
163 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
164 | 16, /* bitsize */ | |
165 | false, /* pc_relative */ | |
166 | 0, /* bitpos */ | |
167 | complain_overflow_bitfield, /* complain_on_overflow */ | |
168 | mips_refhi_reloc, /* special_function */ | |
169 | "REFHI", /* name */ | |
170 | true, /* partial_inplace */ | |
171 | 0xffff, /* src_mask */ | |
172 | 0xffff, /* dst_mask */ | |
173 | false), /* pcrel_offset */ | |
174 | ||
175 | /* The low 16 bits of a symbol value. */ | |
176 | HOWTO (MIPS_R_REFLO, /* type */ | |
177 | 0, /* rightshift */ | |
178 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
179 | 16, /* bitsize */ | |
180 | false, /* pc_relative */ | |
181 | 0, /* bitpos */ | |
182 | complain_overflow_dont, /* complain_on_overflow */ | |
183 | mips_reflo_reloc, /* special_function */ | |
184 | "REFLO", /* name */ | |
185 | true, /* partial_inplace */ | |
186 | 0xffff, /* src_mask */ | |
187 | 0xffff, /* dst_mask */ | |
188 | false), /* pcrel_offset */ | |
189 | ||
190 | /* A reference to an offset from the gp register. Handled by the | |
191 | function mips_gprel_reloc. */ | |
192 | HOWTO (MIPS_R_GPREL, /* type */ | |
193 | 0, /* rightshift */ | |
194 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
195 | 16, /* bitsize */ | |
196 | false, /* pc_relative */ | |
197 | 0, /* bitpos */ | |
198 | complain_overflow_signed, /* complain_on_overflow */ | |
199 | mips_gprel_reloc, /* special_function */ | |
200 | "GPREL", /* name */ | |
201 | true, /* partial_inplace */ | |
202 | 0xffff, /* src_mask */ | |
203 | 0xffff, /* dst_mask */ | |
204 | false), /* pcrel_offset */ | |
205 | ||
206 | /* A reference to a literal using an offset from the gp register. | |
207 | Handled by the function mips_gprel_reloc. */ | |
208 | HOWTO (MIPS_R_LITERAL, /* type */ | |
209 | 0, /* rightshift */ | |
210 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
211 | 16, /* bitsize */ | |
212 | false, /* pc_relative */ | |
213 | 0, /* bitpos */ | |
214 | complain_overflow_signed, /* complain_on_overflow */ | |
215 | mips_gprel_reloc, /* special_function */ | |
216 | "LITERAL", /* name */ | |
217 | true, /* partial_inplace */ | |
218 | 0xffff, /* src_mask */ | |
219 | 0xffff, /* dst_mask */ | |
220 | false) /* pcrel_offset */ | |
dae31cf5 | 221 | }; |
23f44e6f ILT |
222 | |
223 | #define MIPS_HOWTO_COUNT \ | |
224 | (sizeof mips_howto_table / sizeof mips_howto_table[0]) | |
dae31cf5 ILT |
225 | \f |
226 | /* See whether the magic number matches. */ | |
8fa0d3a0 | 227 | |
dae31cf5 ILT |
228 | static boolean |
229 | mips_ecoff_bad_format_hook (abfd, filehdr) | |
230 | bfd *abfd; | |
231 | PTR filehdr; | |
232 | { | |
233 | struct internal_filehdr *internal_f = (struct internal_filehdr *) filehdr; | |
8fa0d3a0 | 234 | |
dae31cf5 | 235 | if (MIPS_ECOFF_BADMAG (*internal_f)) |
8fa0d3a0 ILT |
236 | return false; |
237 | ||
8fa0d3a0 ILT |
238 | return true; |
239 | } | |
c3fe0c41 | 240 | |
dae31cf5 | 241 | /* Create the MIPS ECOFF backend specific information. */ |
c3fe0c41 | 242 | |
dae31cf5 ILT |
243 | static PTR |
244 | mips_ecoff_mkobject_hook (abfd, filehdr, aouthdr) | |
f6409552 | 245 | bfd *abfd; |
dae31cf5 ILT |
246 | PTR filehdr; |
247 | PTR aouthdr; | |
c3fe0c41 | 248 | { |
dae31cf5 ILT |
249 | struct internal_filehdr *internal_f = (struct internal_filehdr *) filehdr; |
250 | struct internal_aouthdr *internal_a = (struct internal_aouthdr *) aouthdr; | |
251 | ecoff_data_type *ecoff; | |
c3fe0c41 | 252 | |
23f44e6f | 253 | if (ecoff_mkobject (abfd) == false) |
dae31cf5 | 254 | return NULL; |
c3fe0c41 | 255 | |
dae31cf5 ILT |
256 | ecoff = ecoff_data (abfd); |
257 | ecoff->gp_size = 8; | |
258 | ecoff->sym_filepos = internal_f->f_symptr; | |
23ba15b7 | 259 | |
dae31cf5 | 260 | if (internal_a != (struct internal_aouthdr *) NULL) |
c3fe0c41 | 261 | { |
dae31cf5 | 262 | int i; |
23ba15b7 | 263 | |
dae31cf5 ILT |
264 | ecoff->text_start = internal_a->text_start; |
265 | ecoff->text_end = internal_a->text_start + internal_a->tsize; | |
266 | ecoff->gp = internal_a->gp_value; | |
267 | ecoff->gprmask = internal_a->gprmask; | |
268 | for (i = 0; i < 4; i++) | |
269 | ecoff->cprmask[i] = internal_a->cprmask[i]; | |
270 | if (internal_a->magic == ECOFF_AOUT_ZMAGIC) | |
271 | abfd->flags |= D_PAGED; | |
c3fe0c41 ILT |
272 | } |
273 | ||
dae31cf5 ILT |
274 | return (PTR) ecoff; |
275 | } | |
276 | \f | |
277 | /* Reloc handling. MIPS ECOFF relocs are packed into 8 bytes in | |
278 | external form. They use a bit which indicates whether the symbol | |
279 | is external. */ | |
23ba15b7 | 280 | |
dae31cf5 | 281 | /* Swap a reloc in. */ |
23ba15b7 | 282 | |
dae31cf5 ILT |
283 | static void |
284 | mips_ecoff_swap_reloc_in (abfd, ext_ptr, intern) | |
285 | bfd *abfd; | |
286 | PTR ext_ptr; | |
287 | struct internal_reloc *intern; | |
288 | { | |
289 | const RELOC *ext = (RELOC *) ext_ptr; | |
23ba15b7 | 290 | |
dae31cf5 ILT |
291 | intern->r_vaddr = bfd_h_get_32 (abfd, (bfd_byte *) ext->r_vaddr); |
292 | if (abfd->xvec->header_byteorder_big_p != false) | |
293 | { | |
294 | intern->r_symndx = (((int) ext->r_bits[0] | |
295 | << RELOC_BITS0_SYMNDX_SH_LEFT_BIG) | |
296 | | ((int) ext->r_bits[1] | |
297 | << RELOC_BITS1_SYMNDX_SH_LEFT_BIG) | |
298 | | ((int) ext->r_bits[2] | |
299 | << RELOC_BITS2_SYMNDX_SH_LEFT_BIG)); | |
300 | intern->r_type = ((ext->r_bits[3] & RELOC_BITS3_TYPE_BIG) | |
301 | >> RELOC_BITS3_TYPE_SH_BIG); | |
302 | intern->r_extern = (ext->r_bits[3] & RELOC_BITS3_EXTERN_BIG) != 0; | |
23ba15b7 | 303 | } |
dae31cf5 | 304 | else |
23ba15b7 | 305 | { |
dae31cf5 ILT |
306 | intern->r_symndx = (((int) ext->r_bits[0] |
307 | << RELOC_BITS0_SYMNDX_SH_LEFT_LITTLE) | |
308 | | ((int) ext->r_bits[1] | |
309 | << RELOC_BITS1_SYMNDX_SH_LEFT_LITTLE) | |
310 | | ((int) ext->r_bits[2] | |
311 | << RELOC_BITS2_SYMNDX_SH_LEFT_LITTLE)); | |
312 | intern->r_type = ((ext->r_bits[3] & RELOC_BITS3_TYPE_LITTLE) | |
313 | >> RELOC_BITS3_TYPE_SH_LITTLE); | |
314 | intern->r_extern = (ext->r_bits[3] & RELOC_BITS3_EXTERN_LITTLE) != 0; | |
23ba15b7 | 315 | } |
c3fe0c41 ILT |
316 | } |
317 | ||
dae31cf5 | 318 | /* Swap a reloc out. */ |
c3fe0c41 | 319 | |
dae31cf5 ILT |
320 | static void |
321 | mips_ecoff_swap_reloc_out (abfd, intern, dst) | |
f6409552 | 322 | bfd *abfd; |
dae31cf5 ILT |
323 | const struct internal_reloc *intern; |
324 | PTR dst; | |
c3fe0c41 | 325 | { |
dae31cf5 | 326 | RELOC *ext = (RELOC *) dst; |
c3fe0c41 | 327 | |
dae31cf5 ILT |
328 | bfd_h_put_32 (abfd, intern->r_vaddr, (bfd_byte *) ext->r_vaddr); |
329 | if (abfd->xvec->header_byteorder_big_p != false) | |
c3fe0c41 | 330 | { |
dae31cf5 ILT |
331 | ext->r_bits[0] = intern->r_symndx >> RELOC_BITS0_SYMNDX_SH_LEFT_BIG; |
332 | ext->r_bits[1] = intern->r_symndx >> RELOC_BITS1_SYMNDX_SH_LEFT_BIG; | |
333 | ext->r_bits[2] = intern->r_symndx >> RELOC_BITS2_SYMNDX_SH_LEFT_BIG; | |
334 | ext->r_bits[3] = (((intern->r_type << RELOC_BITS3_TYPE_SH_BIG) | |
335 | & RELOC_BITS3_TYPE_BIG) | |
336 | | (intern->r_extern ? RELOC_BITS3_EXTERN_BIG : 0)); | |
c3fe0c41 | 337 | } |
dae31cf5 | 338 | else |
c3fe0c41 | 339 | { |
dae31cf5 ILT |
340 | ext->r_bits[0] = intern->r_symndx >> RELOC_BITS0_SYMNDX_SH_LEFT_LITTLE; |
341 | ext->r_bits[1] = intern->r_symndx >> RELOC_BITS1_SYMNDX_SH_LEFT_LITTLE; | |
342 | ext->r_bits[2] = intern->r_symndx >> RELOC_BITS2_SYMNDX_SH_LEFT_LITTLE; | |
343 | ext->r_bits[3] = (((intern->r_type << RELOC_BITS3_TYPE_SH_LITTLE) | |
344 | & RELOC_BITS3_TYPE_LITTLE) | |
345 | | (intern->r_extern ? RELOC_BITS3_EXTERN_LITTLE : 0)); | |
c3fe0c41 | 346 | } |
c3fe0c41 | 347 | } |
23f44e6f ILT |
348 | |
349 | /* Finish canonicalizing a reloc. Part of this is generic to all | |
350 | ECOFF targets, and that part is in ecoff.c. The rest is done in | |
351 | this backend routine. It must fill in the howto field. */ | |
352 | ||
353 | static void | |
354 | mips_finish_reloc (abfd, intern, rptr) | |
355 | bfd *abfd; | |
356 | struct internal_reloc *intern; | |
357 | arelent *rptr; | |
358 | { | |
359 | if (intern->r_type > MIPS_R_LITERAL) | |
360 | abort (); | |
361 | ||
362 | if (! intern->r_extern | |
363 | && (intern->r_type == MIPS_R_GPREL | |
364 | || intern->r_type == MIPS_R_LITERAL)) | |
365 | rptr->addend += ecoff_data (abfd)->gp; | |
366 | ||
367 | /* If the type is MIPS_R_IGNORE, make sure this is a reference to | |
368 | the absolute section so that the reloc is ignored. */ | |
369 | if (intern->r_type == MIPS_R_IGNORE) | |
370 | rptr->sym_ptr_ptr = bfd_abs_section.symbol_ptr_ptr; | |
371 | ||
372 | rptr->howto = &mips_howto_table[intern->r_type]; | |
373 | } | |
374 | ||
375 | /* ECOFF relocs are either against external symbols, or against | |
376 | sections. If we are producing relocateable output, and the reloc | |
377 | is against an external symbol, and nothing has given us any | |
378 | additional addend, the resulting reloc will also be against the | |
379 | same symbol. In such a case, we don't want to change anything | |
380 | about the way the reloc is handled, since it will all be done at | |
381 | final link time. Rather than put special case code into | |
382 | bfd_perform_relocation, all the reloc types use this howto | |
383 | function. It just short circuits the reloc if producing | |
384 | relocateable output against an external symbol. */ | |
385 | ||
386 | static bfd_reloc_status_type | |
387 | mips_generic_reloc (abfd, | |
388 | reloc_entry, | |
389 | symbol, | |
390 | data, | |
391 | input_section, | |
392 | output_bfd) | |
393 | bfd *abfd; | |
394 | arelent *reloc_entry; | |
395 | asymbol *symbol; | |
396 | PTR data; | |
397 | asection *input_section; | |
398 | bfd *output_bfd; | |
399 | { | |
400 | if (output_bfd != (bfd *) NULL | |
401 | && (symbol->flags & BSF_SECTION_SYM) == 0 | |
402 | && reloc_entry->addend == 0) | |
403 | { | |
404 | reloc_entry->address += input_section->output_offset; | |
405 | return bfd_reloc_ok; | |
406 | } | |
407 | ||
408 | return bfd_reloc_continue; | |
409 | } | |
410 | ||
411 | /* Do a REFHI relocation. This has to be done in combination with a | |
412 | REFLO reloc, because there is a carry from the REFLO to the REFHI. | |
413 | Here we just save the information we need; we do the actual | |
414 | relocation when we see the REFLO. MIPS ECOFF requires that the | |
415 | REFLO immediately follow the REFHI, so this ought to work. */ | |
416 | ||
417 | static bfd_byte *mips_refhi_addr; | |
418 | static bfd_vma mips_refhi_addend; | |
419 | ||
420 | static bfd_reloc_status_type | |
421 | mips_refhi_reloc (abfd, | |
422 | reloc_entry, | |
423 | symbol, | |
424 | data, | |
425 | input_section, | |
426 | output_bfd) | |
427 | bfd *abfd; | |
428 | arelent *reloc_entry; | |
429 | asymbol *symbol; | |
430 | PTR data; | |
431 | asection *input_section; | |
432 | bfd *output_bfd; | |
433 | { | |
434 | bfd_reloc_status_type ret; | |
435 | bfd_vma relocation; | |
436 | ||
437 | /* If we're relocating, and this an external symbol, we don't want | |
438 | to change anything. */ | |
439 | if (output_bfd != (bfd *) NULL | |
440 | && (symbol->flags & BSF_SECTION_SYM) == 0 | |
441 | && reloc_entry->addend == 0) | |
442 | { | |
443 | reloc_entry->address += input_section->output_offset; | |
444 | return bfd_reloc_ok; | |
445 | } | |
446 | ||
447 | ret = bfd_reloc_ok; | |
448 | if (symbol->section == &bfd_und_section | |
449 | && output_bfd == (bfd *) NULL) | |
450 | ret = bfd_reloc_undefined; | |
451 | ||
452 | if (bfd_is_com_section (symbol->section)) | |
453 | relocation = 0; | |
454 | else | |
455 | relocation = symbol->value; | |
456 | ||
457 | relocation += symbol->section->output_section->vma; | |
458 | relocation += symbol->section->output_offset; | |
459 | relocation += reloc_entry->addend; | |
460 | ||
461 | if (reloc_entry->address > input_section->_cooked_size) | |
462 | return bfd_reloc_outofrange; | |
463 | ||
464 | /* Save the information, and let REFLO do the actual relocation. */ | |
465 | mips_refhi_addr = (bfd_byte *) data + reloc_entry->address; | |
466 | mips_refhi_addend = relocation; | |
467 | ||
468 | if (output_bfd != (bfd *) NULL) | |
469 | reloc_entry->address += input_section->output_offset; | |
470 | ||
471 | return ret; | |
472 | } | |
473 | ||
474 | /* Do a REFLO relocation. This is a straightforward 16 bit inplace | |
475 | relocation; this function exists in order to do the REFHI | |
476 | relocation described above. */ | |
477 | ||
478 | static bfd_reloc_status_type | |
479 | mips_reflo_reloc (abfd, | |
480 | reloc_entry, | |
481 | symbol, | |
482 | data, | |
483 | input_section, | |
484 | output_bfd) | |
485 | bfd *abfd; | |
486 | arelent *reloc_entry; | |
487 | asymbol *symbol; | |
488 | PTR data; | |
489 | asection *input_section; | |
490 | bfd *output_bfd; | |
491 | { | |
492 | if (mips_refhi_addr != (bfd_byte *) NULL) | |
493 | { | |
494 | unsigned long insn; | |
495 | unsigned long val; | |
496 | unsigned long vallo; | |
497 | ||
498 | /* Do the REFHI relocation. Note that we actually don't need to | |
499 | know anything about the REFLO itself, except where to find | |
500 | the low 16 bits of the addend needed by the REFHI. */ | |
501 | insn = bfd_get_32 (abfd, mips_refhi_addr); | |
502 | vallo = (bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address) | |
503 | & 0xffff); | |
504 | val = ((insn & 0xffff) << 16) + vallo; | |
505 | val += mips_refhi_addend; | |
506 | ||
507 | /* The low order 16 bits are always treated as a signed value. | |
508 | Therefore, a negative value in the low order bits requires an | |
509 | adjustment in the high order bits. We need to make this | |
510 | adjustment in two ways: once for the bits we took from the | |
511 | data, and once for the bits we are putting back in to the | |
512 | data. */ | |
513 | if ((vallo & 0x8000) != 0) | |
514 | val -= 0x10000; | |
515 | if ((val & 0x8000) != 0) | |
516 | val += 0x10000; | |
517 | ||
518 | insn = (insn &~ 0xffff) | ((val >> 16) & 0xffff); | |
519 | bfd_put_32 (abfd, insn, mips_refhi_addr); | |
520 | ||
521 | mips_refhi_addr = (bfd_byte *) NULL; | |
522 | } | |
523 | ||
524 | /* Now do the REFLO reloc in the usual way. */ | |
525 | return mips_generic_reloc (abfd, reloc_entry, symbol, data, | |
526 | input_section, output_bfd); | |
527 | } | |
528 | ||
529 | /* Do a GPREL relocation. This is a 16 bit value which must become | |
530 | the offset from the gp register. */ | |
531 | ||
532 | static bfd_reloc_status_type | |
533 | mips_gprel_reloc (abfd, | |
534 | reloc_entry, | |
535 | symbol, | |
536 | data, | |
537 | input_section, | |
538 | output_bfd) | |
539 | bfd *abfd; | |
540 | arelent *reloc_entry; | |
541 | asymbol *symbol; | |
542 | PTR data; | |
543 | asection *input_section; | |
544 | bfd *output_bfd; | |
545 | { | |
546 | boolean relocateable; | |
547 | bfd_vma relocation; | |
548 | unsigned long val; | |
549 | unsigned long insn; | |
550 | ||
551 | /* If we're relocating, and this is an external symbol with no | |
552 | addend, we don't want to change anything. We will only have an | |
553 | addend if this is a newly created reloc, not read from an ECOFF | |
554 | file. */ | |
555 | if (output_bfd != (bfd *) NULL | |
556 | && (symbol->flags & BSF_SECTION_SYM) == 0 | |
557 | && reloc_entry->addend == 0) | |
558 | { | |
559 | reloc_entry->address += input_section->output_offset; | |
560 | return bfd_reloc_ok; | |
561 | } | |
562 | ||
563 | if (output_bfd != (bfd *) NULL) | |
564 | relocateable = true; | |
565 | else | |
566 | { | |
567 | relocateable = false; | |
568 | output_bfd = symbol->section->output_section->owner; | |
569 | } | |
570 | ||
571 | if (symbol->section == &bfd_und_section | |
572 | && relocateable == false) | |
573 | return bfd_reloc_undefined; | |
574 | ||
575 | /* We have to figure out the gp value, so that we can adjust the | |
576 | symbol value correctly. We look up the symbol _gp in the output | |
577 | BFD. If we can't find it, we're stuck. We cache it in the ECOFF | |
578 | target data. We don't need to adjust the symbol value for an | |
579 | external symbol if we are producing relocateable output. */ | |
580 | if (ecoff_data (output_bfd)->gp == 0 | |
581 | && (relocateable == false | |
582 | || (symbol->flags & BSF_SECTION_SYM) != 0)) | |
583 | { | |
584 | if (relocateable != false) | |
585 | { | |
586 | /* Make up a value. */ | |
587 | ecoff_data (output_bfd)->gp = | |
588 | symbol->section->output_section->vma + 0x4000; | |
589 | } | |
590 | else | |
591 | { | |
592 | unsigned int count; | |
593 | asymbol **sym; | |
594 | unsigned int i; | |
595 | ||
596 | count = bfd_get_symcount (output_bfd); | |
597 | sym = bfd_get_outsymbols (output_bfd); | |
598 | ||
599 | if (sym == (asymbol **) NULL) | |
600 | i = count; | |
601 | else | |
602 | { | |
603 | for (i = 0; i < count; i++, sym++) | |
604 | { | |
605 | register CONST char *name; | |
606 | ||
607 | name = bfd_asymbol_name (*sym); | |
608 | if (*name == '_' && strcmp (name, "_gp") == 0) | |
609 | { | |
610 | ecoff_data (output_bfd)->gp = bfd_asymbol_value (*sym); | |
611 | break; | |
612 | } | |
613 | } | |
614 | } | |
615 | ||
616 | if (i >= count) | |
617 | { | |
618 | /* Only get the error once. */ | |
619 | ecoff_data (output_bfd)->gp = 4; | |
620 | /* FIXME: How can we get the program name here? */ | |
621 | fprintf (stderr, | |
622 | "GP relative relocation when _gp not defined\n"); | |
623 | return bfd_reloc_dangerous; | |
624 | } | |
625 | } | |
626 | } | |
627 | ||
628 | if (bfd_is_com_section (symbol->section)) | |
629 | relocation = 0; | |
630 | else | |
631 | relocation = symbol->value; | |
632 | ||
633 | relocation += symbol->section->output_section->vma; | |
634 | relocation += symbol->section->output_offset; | |
635 | ||
636 | if (reloc_entry->address > input_section->_cooked_size) | |
637 | return bfd_reloc_outofrange; | |
638 | ||
639 | insn = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address); | |
640 | ||
641 | /* Set val to the offset into the section or symbol. */ | |
642 | val = ((insn & 0xffff) + reloc_entry->addend) & 0xffff; | |
643 | if (val & 0x8000) | |
644 | val -= 0x10000; | |
645 | ||
646 | /* Adjust val for the final section location and GP value. If we | |
647 | are producing relocateable output, we don't want to do this for | |
648 | an external symbol. */ | |
649 | if (relocateable == false | |
650 | || (symbol->flags & BSF_SECTION_SYM) != 0) | |
651 | val += relocation - ecoff_data (output_bfd)->gp; | |
652 | ||
653 | insn = (insn &~ 0xffff) | (val & 0xffff); | |
654 | bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address); | |
655 | ||
656 | if (relocateable != false) | |
657 | reloc_entry->address += input_section->output_offset; | |
658 | ||
659 | /* Make sure it fit in 16 bits. */ | |
660 | if (val >= 0x8000 && val < 0xffff8000) | |
661 | return bfd_reloc_outofrange; | |
662 | ||
663 | return bfd_reloc_ok; | |
664 | } | |
665 | ||
666 | /* Get the howto structure for a generic reloc type. */ | |
667 | ||
668 | static CONST struct reloc_howto_struct * | |
669 | mips_bfd_reloc_type_lookup (abfd, code) | |
670 | bfd *abfd; | |
671 | bfd_reloc_code_real_type code; | |
672 | { | |
673 | int mips_type; | |
674 | ||
675 | switch (code) | |
676 | { | |
677 | case BFD_RELOC_16: | |
678 | mips_type = MIPS_R_REFHALF; | |
679 | break; | |
680 | case BFD_RELOC_32: | |
681 | mips_type = MIPS_R_REFWORD; | |
682 | break; | |
683 | case BFD_RELOC_MIPS_JMP: | |
684 | mips_type = MIPS_R_JMPADDR; | |
685 | break; | |
686 | case BFD_RELOC_HI16_S: | |
687 | mips_type = MIPS_R_REFHI; | |
688 | break; | |
689 | case BFD_RELOC_LO16: | |
690 | mips_type = MIPS_R_REFLO; | |
691 | break; | |
692 | case BFD_RELOC_MIPS_GPREL: | |
693 | mips_type = MIPS_R_GPREL; | |
694 | break; | |
695 | default: | |
696 | return (CONST struct reloc_howto_struct *) NULL; | |
697 | } | |
698 | ||
699 | return &mips_howto_table[mips_type]; | |
700 | } | |
c3fe0c41 | 701 | \f |
de17306e ILT |
702 | #ifdef HOST_IRIX4 |
703 | ||
704 | #include <core.out.h> | |
705 | ||
706 | struct sgi_core_struct | |
707 | { | |
708 | int sig; | |
709 | char cmd[CORE_NAMESIZE]; | |
710 | }; | |
711 | ||
712 | #define core_hdr(bfd) ((bfd)->tdata.sgi_core_data) | |
713 | #define core_signal(bfd) (core_hdr(bfd)->sig) | |
714 | #define core_command(bfd) (core_hdr(bfd)->cmd) | |
715 | ||
716 | static asection * | |
717 | make_bfd_asection (abfd, name, flags, _raw_size, vma, filepos) | |
718 | bfd *abfd; | |
719 | CONST char *name; | |
720 | flagword flags; | |
721 | bfd_size_type _raw_size; | |
722 | bfd_vma vma; | |
723 | file_ptr filepos; | |
724 | { | |
725 | asection *asect; | |
726 | ||
727 | asect = bfd_make_section (abfd, name); | |
728 | if (!asect) | |
729 | return NULL; | |
730 | ||
731 | asect->flags = flags; | |
732 | asect->_raw_size = _raw_size; | |
733 | asect->vma = vma; | |
734 | asect->filepos = filepos; | |
735 | asect->alignment_power = 4; | |
736 | ||
737 | return asect; | |
738 | } | |
739 | ||
740 | static bfd_target * | |
741 | ecoff_core_file_p (abfd) | |
742 | bfd *abfd; | |
743 | { | |
744 | int val; | |
745 | int i; | |
746 | char *secname; | |
747 | struct coreout coreout; | |
748 | struct idesc *idg, *idf, *ids; | |
749 | ||
750 | val = bfd_read ((PTR)&coreout, 1, sizeof coreout, abfd); | |
751 | if (val != sizeof coreout) | |
752 | return 0; | |
753 | ||
754 | if (coreout.c_magic != CORE_MAGIC | |
755 | || coreout.c_version != CORE_VERSION1) | |
756 | return 0; | |
757 | ||
758 | core_hdr (abfd) = (struct sgi_core_struct *) bfd_zalloc (abfd, sizeof (struct sgi_core_struct)); | |
759 | if (!core_hdr (abfd)) | |
760 | return NULL; | |
761 | ||
762 | strncpy (core_command (abfd), coreout.c_name, CORE_NAMESIZE); | |
763 | core_signal (abfd) = coreout.c_sigcause; | |
764 | ||
765 | bfd_seek (abfd, coreout.c_vmapoffset, SEEK_SET); | |
766 | ||
767 | for (i = 0; i < coreout.c_nvmap; i++) | |
768 | { | |
769 | struct vmap vmap; | |
770 | ||
771 | val = bfd_read ((PTR)&vmap, 1, sizeof vmap, abfd); | |
772 | if (val != sizeof vmap) | |
773 | break; | |
774 | ||
775 | switch (vmap.v_type) | |
776 | { | |
777 | case VDATA: | |
778 | secname = ".data"; | |
779 | break; | |
780 | case VSTACK: | |
781 | secname = ".stack"; | |
782 | break; | |
783 | default: | |
784 | continue; | |
785 | } | |
786 | ||
787 | if (!make_bfd_asection (abfd, secname, | |
788 | SEC_ALLOC+SEC_LOAD+SEC_HAS_CONTENTS, | |
789 | vmap.v_len, | |
790 | vmap.v_vaddr, | |
791 | vmap.v_offset, | |
792 | 2)) | |
793 | return NULL; | |
794 | } | |
795 | ||
796 | /* Make sure that the regs are contiguous within the core file. */ | |
797 | ||
798 | idg = &coreout.c_idesc[I_GPREGS]; | |
799 | idf = &coreout.c_idesc[I_FPREGS]; | |
800 | ids = &coreout.c_idesc[I_SPECREGS]; | |
801 | ||
802 | if (idg->i_offset + idg->i_len != idf->i_offset | |
803 | || idf->i_offset + idf->i_len != ids->i_offset) | |
804 | return 0; /* Can't deal with non-contig regs */ | |
805 | ||
806 | bfd_seek (abfd, idg->i_offset, SEEK_SET); | |
807 | ||
808 | make_bfd_asection (abfd, ".reg", | |
809 | SEC_ALLOC+SEC_HAS_CONTENTS, | |
810 | idg->i_len + idf->i_len + ids->i_len, | |
811 | 0, | |
812 | idg->i_offset); | |
813 | ||
814 | /* OK, we believe you. You're a core file (sure, sure). */ | |
815 | ||
816 | return abfd->xvec; | |
817 | } | |
818 | ||
819 | static char * | |
820 | ecoff_core_file_failing_command (abfd) | |
821 | bfd *abfd; | |
822 | { | |
823 | return core_command (abfd); | |
824 | } | |
825 | ||
826 | static int | |
827 | ecoff_core_file_failing_signal (abfd) | |
828 | bfd *abfd; | |
829 | { | |
830 | return core_signal (abfd); | |
831 | } | |
832 | ||
833 | static boolean | |
834 | ecoff_core_file_matches_executable_p (core_bfd, exec_bfd) | |
835 | bfd *core_bfd, *exec_bfd; | |
836 | { | |
837 | return true; /* XXX - FIXME */ | |
838 | } | |
839 | #else /* not def HOST_IRIX4 */ | |
840 | #define ecoff_core_file_p _bfd_dummy_target | |
841 | #define ecoff_core_file_failing_command _bfd_dummy_core_file_failing_command | |
842 | #define ecoff_core_file_failing_signal _bfd_dummy_core_file_failing_signal | |
843 | #define ecoff_core_file_matches_executable_p \ | |
844 | _bfd_dummy_core_file_matches_executable_p | |
845 | #endif | |
846 | \f | |
23f44e6f ILT |
847 | /* This is the ECOFF backend structure. The backend field of the |
848 | target vector points to this. */ | |
849 | ||
850 | static const struct ecoff_backend_data mips_ecoff_backend_data = | |
851 | { | |
852 | /* COFF backend structure. */ | |
853 | { | |
854 | (void (*) PARAMS ((bfd *,PTR,int,int,PTR))) bfd_void, /* aux_in */ | |
855 | (void (*) PARAMS ((bfd *,PTR,PTR))) bfd_void, /* sym_in */ | |
856 | (void (*) PARAMS ((bfd *,PTR,PTR))) bfd_void, /* lineno_in */ | |
857 | (unsigned (*) PARAMS ((bfd *,PTR,int,int,PTR))) bfd_void, /* aux_out */ | |
858 | (unsigned (*) PARAMS ((bfd *,PTR,PTR))) bfd_void, /* sym_out */ | |
859 | (unsigned (*) PARAMS ((bfd *,PTR,PTR))) bfd_void, /* lineno_out */ | |
860 | (unsigned (*) PARAMS ((bfd *,PTR,PTR))) bfd_void, /* reloc_out */ | |
861 | mips_ecoff_swap_filehdr_out, mips_ecoff_swap_aouthdr_out, | |
862 | mips_ecoff_swap_scnhdr_out, | |
863 | FILHSZ, AOUTSZ, SCNHSZ, 0, 0, 0, true, | |
864 | mips_ecoff_swap_filehdr_in, mips_ecoff_swap_aouthdr_in, | |
865 | mips_ecoff_swap_scnhdr_in, mips_ecoff_bad_format_hook, | |
866 | ecoff_set_arch_mach_hook, mips_ecoff_mkobject_hook, | |
867 | ecoff_styp_to_sec_flags, ecoff_make_section_hook, ecoff_set_alignment_hook, | |
868 | ecoff_slurp_symbol_table, NULL, NULL | |
869 | }, | |
870 | /* Supported architecture. */ | |
871 | bfd_arch_mips, | |
872 | /* Big endian magic number. */ | |
873 | MIPS_MAGIC_BIG, | |
874 | /* Little endian magic number. */ | |
875 | MIPS_MAGIC_LITTLE, | |
876 | /* Symbol table magic number. */ | |
877 | magicSym, | |
878 | /* Initial portion of armap string. */ | |
879 | "__________", | |
880 | /* Alignment of debugging information. E.g., 4. */ | |
881 | 4, | |
882 | /* The page boundary used to align sections in a demand-paged | |
883 | executable file. E.g., 0x1000. */ | |
884 | 0x1000, | |
885 | /* Bitsize of constructor entries. */ | |
886 | 32, | |
887 | /* Reloc to use for constructor entries. */ | |
888 | &mips_howto_table[MIPS_R_REFWORD], | |
889 | /* Sizes of external symbolic information. */ | |
890 | sizeof (struct hdr_ext), | |
891 | sizeof (struct dnr_ext), | |
892 | sizeof (struct pdr_ext), | |
893 | sizeof (struct sym_ext), | |
894 | sizeof (struct opt_ext), | |
895 | sizeof (struct fdr_ext), | |
896 | sizeof (struct rfd_ext), | |
897 | sizeof (struct ext_ext), | |
898 | /* Functions to swap in external symbolic data. */ | |
899 | ecoff_swap_hdr_in, | |
900 | ecoff_swap_dnr_in, | |
901 | ecoff_swap_pdr_in, | |
902 | ecoff_swap_sym_in, | |
903 | ecoff_swap_opt_in, | |
904 | ecoff_swap_fdr_in, | |
905 | ecoff_swap_rfd_in, | |
906 | ecoff_swap_ext_in, | |
907 | /* Functions to swap out external symbolic data. */ | |
908 | ecoff_swap_hdr_out, | |
909 | ecoff_swap_dnr_out, | |
910 | ecoff_swap_pdr_out, | |
911 | ecoff_swap_sym_out, | |
912 | ecoff_swap_opt_out, | |
913 | ecoff_swap_fdr_out, | |
914 | ecoff_swap_rfd_out, | |
915 | ecoff_swap_ext_out, | |
916 | /* External reloc size. */ | |
917 | RELSZ, | |
918 | /* Reloc swapping functions. */ | |
919 | mips_ecoff_swap_reloc_in, | |
920 | mips_ecoff_swap_reloc_out, | |
921 | /* Backend reloc tweaking. */ | |
922 | mips_finish_reloc | |
515c4292 ILT |
923 | }; |
924 | ||
23f44e6f ILT |
925 | /* Looking up a reloc type is MIPS specific. */ |
926 | #define ecoff_bfd_reloc_type_lookup mips_bfd_reloc_type_lookup | |
927 | ||
1327fb29 | 928 | bfd_target ecoff_little_vec = |
294eaca4 SC |
929 | { |
930 | "ecoff-littlemips", /* name */ | |
515c4292 | 931 | bfd_target_ecoff_flavour, |
294eaca4 SC |
932 | false, /* data byte order is little */ |
933 | false, /* header byte order is little */ | |
934 | ||
935 | (HAS_RELOC | EXEC_P | /* object flags */ | |
936 | HAS_LINENO | HAS_DEBUG | | |
de17306e | 937 | HAS_SYMS | HAS_LOCALS | DYNAMIC | WP_TEXT | D_PAGED), |
294eaca4 SC |
938 | |
939 | (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* sect | |
940 | flags */ | |
941 | 0, /* leading underscore */ | |
de17306e | 942 | ' ', /* ar_pad_char */ |
294eaca4 | 943 | 15, /* ar_max_namelen */ |
de17306e | 944 | 4, /* minimum alignment power */ |
23f44e6f ILT |
945 | bfd_getl64, bfd_getl_signed_64, bfd_putl64, |
946 | bfd_getl32, bfd_getl_signed_32, bfd_putl32, | |
947 | bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* data */ | |
948 | bfd_getl64, bfd_getl_signed_64, bfd_putl64, | |
949 | bfd_getl32, bfd_getl_signed_32, bfd_putl32, | |
950 | bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* hdrs */ | |
294eaca4 | 951 | |
515c4292 | 952 | {_bfd_dummy_target, coff_object_p, /* bfd_check_format */ |
c3fe0c41 | 953 | ecoff_archive_p, _bfd_dummy_target}, |
23f44e6f | 954 | {bfd_false, ecoff_mkobject, /* bfd_set_format */ |
dae31cf5 | 955 | _bfd_generic_mkarchive, bfd_false}, |
c3fe0c41 ILT |
956 | {bfd_false, ecoff_write_object_contents, /* bfd_write_contents */ |
957 | _bfd_write_archive_contents, bfd_false}, | |
515c4292 | 958 | JUMP_TABLE (ecoff), |
23f44e6f | 959 | (PTR) &mips_ecoff_backend_data |
515c4292 | 960 | }; |
1327fb29 SC |
961 | |
962 | bfd_target ecoff_big_vec = | |
294eaca4 SC |
963 | { |
964 | "ecoff-bigmips", /* name */ | |
515c4292 | 965 | bfd_target_ecoff_flavour, |
294eaca4 SC |
966 | true, /* data byte order is big */ |
967 | true, /* header byte order is big */ | |
968 | ||
969 | (HAS_RELOC | EXEC_P | /* object flags */ | |
970 | HAS_LINENO | HAS_DEBUG | | |
de17306e | 971 | HAS_SYMS | HAS_LOCALS | DYNAMIC | WP_TEXT | D_PAGED), |
294eaca4 SC |
972 | |
973 | (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* sect flags */ | |
974 | 0, /* leading underscore */ | |
975 | ' ', /* ar_pad_char */ | |
de17306e ILT |
976 | 15, /* ar_max_namelen */ |
977 | 4, /* minimum alignment power */ | |
23f44e6f ILT |
978 | bfd_getb64, bfd_getb_signed_64, bfd_putb64, |
979 | bfd_getb32, bfd_getb_signed_32, bfd_putb32, | |
980 | bfd_getb16, bfd_getb_signed_16, bfd_putb16, | |
981 | bfd_getb64, bfd_getb_signed_64, bfd_putb64, | |
982 | bfd_getb32, bfd_getb_signed_32, bfd_putb32, | |
983 | bfd_getb16, bfd_getb_signed_16, bfd_putb16, | |
294eaca4 | 984 | {_bfd_dummy_target, coff_object_p, /* bfd_check_format */ |
de17306e | 985 | ecoff_archive_p, ecoff_core_file_p}, |
23f44e6f | 986 | {bfd_false, ecoff_mkobject, /* bfd_set_format */ |
dae31cf5 | 987 | _bfd_generic_mkarchive, bfd_false}, |
515c4292 | 988 | {bfd_false, ecoff_write_object_contents, /* bfd_write_contents */ |
c3fe0c41 | 989 | _bfd_write_archive_contents, bfd_false}, |
515c4292 | 990 | JUMP_TABLE(ecoff), |
23f44e6f | 991 | (PTR) &mips_ecoff_backend_data |
515c4292 ILT |
992 | /* Note that there is another bfd_target just above this one. If |
993 | you are adding initializers here, you should be adding them there | |
994 | as well. */ | |
995 | }; |