5f22b5935f2848f216488ff01cdce7ea8ae7d6e2
[deliverable/binutils-gdb.git] / bfd / aoutf1.h
1 /* A.out "format 1" file handling code for BFD.
2 Copyright 1990, 1991, 1992 Free Software Foundation, Inc.
3 Written by Cygnus Support.
4
5 This file is part of BFD, the Binary File Descriptor library.
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
20
21 #include "bfd.h"
22 #include "sysdep.h"
23 #include "libbfd.h"
24
25 #include "aout/sun4.h"
26 #include "libaout.h" /* BFD a.out internal data structures */
27
28 #include "aout/aout64.h"
29 #include "aout/stab_gnu.h"
30 #include "aout/ar.h"
31
32 /*
33 The file @code{aoutf1.h} contains the code for BFD's
34 a.out back end. Control over the generated back end is given by these
35 two preprocessor names:
36 @table @code
37 @item ARCH_SIZE
38 This value should be either 32 or 64, depending upon the size of an
39 int in the target format. It changes the sizes of the structs which
40 perform the memory/disk mapping of structures.
41
42 The 64 bit backend may only be used if the host compiler supports 64
43 ints (eg long long with gcc), by defining the name @code{HOST_64_BIT} in @code{bfd.h}.
44 With this name defined, @emph{all} bfd operations are performed with 64bit
45 arithmetic, not just those to a 64bit target.
46
47 @item TARGETNAME
48 The name put into the target vector.
49 @item
50 @end table
51
52 */
53
54 void (*bfd_error_trap)();
55
56 /*SUPPRESS558*/
57 /*SUPPRESS529*/
58
59 void
60 DEFUN(NAME(sunos,set_arch_mach), (abfd, machtype),
61 bfd *abfd AND int machtype)
62 {
63 /* Determine the architecture and machine type of the object file. */
64 enum bfd_architecture arch;
65 long machine;
66 switch (machtype) {
67
68 case M_UNKNOWN:
69 /* Some Sun3s make magic numbers without cpu types in them, so
70 we'll default to the 68020. */
71 arch = bfd_arch_m68k;
72 machine = 68020;
73 break;
74
75 case M_68010:
76 case M_HP200:
77 arch = bfd_arch_m68k;
78 machine = 68010;
79 break;
80
81 case M_68020:
82 case M_HP300:
83 arch = bfd_arch_m68k;
84 machine = 68020;
85 break;
86
87 case M_SPARC:
88 arch = bfd_arch_sparc;
89 machine = 0;
90 break;
91
92 case M_386:
93 arch = bfd_arch_i386;
94 machine = 0;
95 break;
96
97 case M_29K:
98 arch = bfd_arch_a29k;
99 machine = 0;
100 break;
101
102 case M_HPUX:
103 arch = bfd_arch_m68k;
104 machine = 0;
105 break;
106
107 default:
108 arch = bfd_arch_obscure;
109 machine = 0;
110 break;
111 }
112 bfd_set_arch_mach(abfd, arch, machine);
113 }
114
115 #define SET_ARCH_MACH(ABFD, EXEC) \
116 NAME(sunos,set_arch_mach)(ABFD, N_MACHTYPE (EXEC)); \
117 choose_reloc_size(ABFD);
118
119 /* Determine the size of a relocation entry, based on the architecture */
120 static void
121 DEFUN(choose_reloc_size,(abfd),
122 bfd *abfd)
123 {
124 switch (bfd_get_arch(abfd)) {
125 case bfd_arch_sparc:
126 case bfd_arch_a29k:
127 obj_reloc_entry_size (abfd) = RELOC_EXT_SIZE;
128 break;
129 default:
130 obj_reloc_entry_size (abfd) = RELOC_STD_SIZE;
131 break;
132 }
133 }
134
135 /* Write an object file in SunOS format.
136 Section contents have already been written. We write the
137 file header, symbols, and relocation. */
138
139 static boolean
140 DEFUN(NAME(aout,sunos4_write_object_contents),
141 (abfd),
142 bfd *abfd)
143 {
144 struct external_exec exec_bytes;
145 struct internal_exec *execp = exec_hdr (abfd);
146
147 /* Magic number, maestro, please! */
148 switch (bfd_get_arch(abfd)) {
149 case bfd_arch_m68k:
150 switch (bfd_get_mach(abfd)) {
151 case 68010:
152 N_SET_MACHTYPE(*execp, M_68010);
153 break;
154 default:
155 case 68020:
156 N_SET_MACHTYPE(*execp, M_68020);
157 break;
158 }
159 break;
160 case bfd_arch_sparc:
161 N_SET_MACHTYPE(*execp, M_SPARC);
162 break;
163 case bfd_arch_i386:
164 N_SET_MACHTYPE(*execp, M_386);
165 break;
166 case bfd_arch_a29k:
167 N_SET_MACHTYPE(*execp, M_29K);
168 break;
169 default:
170 N_SET_MACHTYPE(*execp, M_UNKNOWN);
171 }
172
173 choose_reloc_size(abfd);
174
175 /* Some tools want this to be 0, some tools want this to be one.
176 Today, it seems that 0 is the most important setting (PR1927) */
177 N_SET_FLAGS (*execp, 0x0);
178
179 WRITE_HEADERS(abfd, execp);
180
181 return true;
182 }
183 \f
184 /* core files */
185
186 #define CORE_MAGIC 0x080456
187 #define CORE_NAMELEN 16
188
189 /* The core structure is taken from the Sun documentation.
190 Unfortunately, they don't document the FPA structure, or at least I
191 can't find it easily. Fortunately the core header contains its own
192 length. So this shouldn't cause problems, except for c_ucode, which
193 so far we don't use but is easy to find with a little arithmetic. */
194
195 /* But the reg structure can be gotten from the SPARC processor handbook.
196 This really should be in a GNU include file though so that gdb can use
197 the same info. */
198 struct regs {
199 int r_psr;
200 int r_pc;
201 int r_npc;
202 int r_y;
203 int r_g1;
204 int r_g2;
205 int r_g3;
206 int r_g4;
207 int r_g5;
208 int r_g6;
209 int r_g7;
210 int r_o0;
211 int r_o1;
212 int r_o2;
213 int r_o3;
214 int r_o4;
215 int r_o5;
216 int r_o6;
217 int r_o7;
218 };
219
220 /* Taken from Sun documentation: */
221
222 /* FIXME: It's worse than we expect. This struct contains TWO substructs
223 neither of whose size we know, WITH STUFF IN BETWEEN THEM! We can't
224 even portably access the stuff in between! */
225
226 struct external_sparc_core {
227 int c_magic; /* Corefile magic number */
228 int c_len; /* Sizeof (struct core) */
229 #define SPARC_CORE_LEN 432
230 int c_regs[19]; /* General purpose registers -- MACHDEP SIZE */
231 struct external_exec c_aouthdr; /* A.out header */
232 int c_signo; /* Killing signal, if any */
233 int c_tsize; /* Text size (bytes) */
234 int c_dsize; /* Data size (bytes) */
235 int c_ssize; /* Stack size (bytes) */
236 char c_cmdname[CORE_NAMELEN + 1]; /* Command name */
237 double fp_stuff[1]; /* external FPU state (size unknown by us) */
238 /* The type "double" is critical here, for alignment.
239 SunOS declares a struct here, but the struct's alignment
240 is double since it contains doubles. */
241 int c_ucode; /* Exception no. from u_code */
242 /* (this member is not accessible by name since we don't
243 portably know the size of fp_stuff.) */
244 };
245
246 struct external_sun3_core {
247 int c_magic; /* Corefile magic number */
248 int c_len; /* Sizeof (struct core) */
249 #define SUN3_CORE_LEN 826 /* As of SunOS 4.1.1 */
250 int c_regs[18]; /* General purpose registers -- MACHDEP SIZE */
251 struct external_exec c_aouthdr; /* A.out header */
252 int c_signo; /* Killing signal, if any */
253 int c_tsize; /* Text size (bytes) */
254 int c_dsize; /* Data size (bytes) */
255 int c_ssize; /* Stack size (bytes) */
256 char c_cmdname[CORE_NAMELEN + 1]; /* Command name */
257 double fp_stuff[1]; /* external FPU state (size unknown by us) */
258 /* The type "double" is critical here, for alignment.
259 SunOS declares a struct here, but the struct's alignment
260 is double since it contains doubles. */
261 int c_ucode; /* Exception no. from u_code */
262 /* (this member is not accessible by name since we don't
263 portably know the size of fp_stuff.) */
264 };
265
266 struct internal_sunos_core {
267 int c_magic; /* Corefile magic number */
268 int c_len; /* Sizeof (struct core) */
269 long c_regs_pos; /* file offset of General purpose registers */
270 int c_regs_size; /* size of General purpose registers */
271 struct internal_exec c_aouthdr; /* A.out header */
272 int c_signo; /* Killing signal, if any */
273 int c_tsize; /* Text size (bytes) */
274 int c_dsize; /* Data size (bytes) */
275 int c_ssize; /* Stack size (bytes) */
276 bfd_vma c_stacktop; /* Stack top (address) */
277 char c_cmdname[CORE_NAMELEN + 1]; /* Command name */
278 long fp_stuff_pos; /* file offset of external FPU state (regs) */
279 int fp_stuff_size; /* Size of it */
280 int c_ucode; /* Exception no. from u_code */
281 };
282
283 /* byte-swap in the Sun-3 core structure */
284 static void
285 DEFUN(swapcore_sun3,(abfd, ext, intcore),
286 bfd *abfd AND
287 char *ext AND
288 struct internal_sunos_core *intcore)
289 {
290 struct external_sun3_core *extcore = (struct external_sun3_core *)ext;
291
292 intcore->c_magic = bfd_h_get_32 (abfd, (unsigned char *)&extcore->c_magic);
293 intcore->c_len = bfd_h_get_32 (abfd, (unsigned char *)&extcore->c_len );
294 intcore->c_regs_pos = (long) (((struct external_sun3_core *)0)->c_regs);
295 intcore->c_regs_size = sizeof (extcore->c_regs);
296 NAME(aout,swap_exec_header_in)(abfd, &extcore->c_aouthdr,&intcore->c_aouthdr);
297 intcore->c_signo = bfd_h_get_32 (abfd, (unsigned char *)&extcore->c_signo);
298 intcore->c_tsize = bfd_h_get_32 (abfd, (unsigned char *)&extcore->c_tsize);
299 intcore->c_dsize = bfd_h_get_32 (abfd, (unsigned char *)&extcore->c_dsize);
300 intcore->c_ssize = bfd_h_get_32 (abfd, (unsigned char *)&extcore->c_ssize);
301 memcpy (intcore->c_cmdname, extcore->c_cmdname, sizeof (intcore->c_cmdname));
302 intcore->fp_stuff_pos = (long) (((struct external_sun3_core *)0)->fp_stuff);
303 /* FP stuff takes up whole rest of struct, except c_ucode. */
304 intcore->fp_stuff_size = intcore->c_len - (sizeof extcore->c_ucode) -
305 (file_ptr)(((struct external_sun3_core *)0)->fp_stuff);
306 /* Ucode is the last thing in the struct -- just before the end */
307 intcore->c_ucode =
308 bfd_h_get_32 (abfd,
309 intcore->c_len - sizeof (extcore->c_ucode) + (unsigned char *)extcore);
310 intcore->c_stacktop = 0x0E000000; /* By experimentation */
311 }
312
313
314 /* byte-swap in the Sparc core structure */
315 static void
316 DEFUN(swapcore_sparc,(abfd, ext, intcore),
317 bfd *abfd AND
318 char *ext AND
319 struct internal_sunos_core *intcore)
320 {
321 struct external_sparc_core *extcore = (struct external_sparc_core *)ext;
322
323 intcore->c_magic = bfd_h_get_32 (abfd, (unsigned char *)&extcore->c_magic);
324 intcore->c_len = bfd_h_get_32 (abfd, (unsigned char *)&extcore->c_len );
325 intcore->c_regs_pos = (long) (((struct external_sparc_core *)0)->c_regs);
326 intcore->c_regs_size = sizeof (extcore->c_regs);
327 NAME(aout,swap_exec_header_in)(abfd, &extcore->c_aouthdr,&intcore->c_aouthdr);
328 intcore->c_signo = bfd_h_get_32 (abfd, (unsigned char *)&extcore->c_signo);
329 intcore->c_tsize = bfd_h_get_32 (abfd, (unsigned char *)&extcore->c_tsize);
330 intcore->c_dsize = bfd_h_get_32 (abfd, (unsigned char *)&extcore->c_dsize);
331 intcore->c_ssize = bfd_h_get_32 (abfd, (unsigned char *)&extcore->c_ssize);
332 memcpy (intcore->c_cmdname, extcore->c_cmdname, sizeof (intcore->c_cmdname));
333 intcore->fp_stuff_pos = (long) (((struct external_sparc_core *)0)->fp_stuff);
334 /* FP stuff takes up whole rest of struct, except c_ucode. */
335 intcore->fp_stuff_size = intcore->c_len - (sizeof extcore->c_ucode) -
336 (file_ptr)(((struct external_sparc_core *)0)->fp_stuff);
337 /* Ucode is the last thing in the struct -- just before the end */
338 intcore->c_ucode =
339 bfd_h_get_32 (abfd,
340 intcore->c_len - sizeof (extcore->c_ucode) + (unsigned char *)extcore);
341
342 /* Supposedly the user stack grows downward from the bottom of kernel memory.
343 Presuming that this remains true, this definition will work. */
344 /* Now sun has provided us with another challenge. The value is different
345 for sparc2 and sparc10 (both running SunOS 4.1.3). We pick one or
346 the other based on the current value of the stack pointer. This
347 loses (a) if the stack pointer has been clobbered, or (b) if the stack
348 is larger than 128 megabytes.
349
350 It's times like these you're glad they're switching to ELF.
351
352 Note that using include files or nlist on /vmunix would be wrong,
353 because we want the value for this core file, no matter what kind of
354 machine we were compiled on or are running on. */
355 #define SPARC_USRSTACK_SPARC2 ((bfd_vma)0xf8000000)
356 #define SPARC_USRSTACK_SPARC10 ((bfd_vma)0xf0000000)
357 {
358 bfd_vma sp = bfd_h_get_32
359 (abfd, (unsigned char *)&((struct regs *)&extcore->c_regs[0])->r_o6);
360 if (sp < SPARC_USRSTACK_SPARC10)
361 intcore->c_stacktop = SPARC_USRSTACK_SPARC10;
362 else
363 intcore->c_stacktop = SPARC_USRSTACK_SPARC2;
364 }
365 }
366
367 /* need this cast because ptr is really void * */
368 #define core_hdr(bfd) ((bfd)->tdata.sun_core_data)
369 #define core_datasec(bfd) (core_hdr(bfd)->data_section)
370 #define core_stacksec(bfd) (core_hdr(bfd)->stack_section)
371 #define core_regsec(bfd) (core_hdr(bfd)->reg_section)
372 #define core_reg2sec(bfd) (core_hdr(bfd)->reg2_section)
373
374 /* These are stored in the bfd's tdata */
375 struct sun_core_struct {
376 struct internal_sunos_core *hdr; /* core file header */
377 asection *data_section;
378 asection *stack_section;
379 asection *reg_section;
380 asection *reg2_section;
381 };
382
383 static bfd_target *
384 DEFUN(sunos4_core_file_p,(abfd),
385 bfd *abfd)
386 {
387 unsigned char longbuf[4]; /* Raw bytes of various header fields */
388 int core_size;
389 int core_mag;
390 struct internal_sunos_core *core;
391 char *extcore;
392 struct mergem {
393 struct sun_core_struct suncoredata;
394 struct internal_sunos_core internal_sunos_core;
395 char external_core[1];
396 } *mergem;
397
398 bfd_error = system_call_error;
399
400 if (bfd_read ((PTR)longbuf, 1, sizeof (longbuf), abfd) !=
401 sizeof (longbuf))
402 return 0;
403 core_mag = bfd_h_get_32 (abfd, longbuf);
404
405 if (core_mag != CORE_MAGIC) return 0;
406
407 /* SunOS core headers can vary in length; second word is size; */
408 if (bfd_read ((PTR)longbuf, 1, sizeof (longbuf), abfd) !=
409 sizeof (longbuf))
410 return 0;
411 core_size = bfd_h_get_32 (abfd, longbuf);
412 /* Sanity check */
413 if (core_size > 20000)
414 return 0;
415
416 if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) < 0) return 0;
417
418 mergem = (struct mergem *)bfd_zalloc (abfd, core_size + sizeof (struct mergem));
419 if (mergem == NULL) {
420 bfd_error = no_memory;
421 return 0;
422 }
423
424 extcore = mergem->external_core;
425
426 if ((bfd_read ((PTR) extcore, 1, core_size, abfd)) != core_size) {
427 bfd_error = system_call_error;
428 bfd_release (abfd, (char *)mergem);
429 return 0;
430 }
431
432 /* Validate that it's a core file we know how to handle, due to sun
433 botching the positioning of registers and other fields in a machine
434 dependent way. */
435 core = &mergem->internal_sunos_core;
436 switch (core_size) {
437 case SPARC_CORE_LEN:
438 swapcore_sparc (abfd, extcore, core);
439 break;
440 case SUN3_CORE_LEN:
441 swapcore_sun3 (abfd, extcore, core);
442 break;
443 default:
444 bfd_error = system_call_error; /* FIXME */
445 bfd_release (abfd, (char *)mergem);
446 return 0;
447 }
448
449 abfd->tdata.sun_core_data = &mergem->suncoredata;
450 abfd->tdata.sun_core_data->hdr = core;
451
452 /* create the sections. This is raunchy, but bfd_close wants to reclaim
453 them */
454 core_stacksec (abfd) = (asection *) bfd_zalloc (abfd, sizeof (asection));
455 if (core_stacksec (abfd) == NULL) {
456 loser:
457 bfd_error = no_memory;
458 bfd_release (abfd, (char *)mergem);
459 return 0;
460 }
461 core_datasec (abfd) = (asection *) bfd_zalloc (abfd, sizeof (asection));
462 if (core_datasec (abfd) == NULL) {
463 loser1:
464 bfd_release (abfd, core_stacksec (abfd));
465 goto loser;
466 }
467 core_regsec (abfd) = (asection *) bfd_zalloc (abfd, sizeof (asection));
468 if (core_regsec (abfd) == NULL) {
469 loser2:
470 bfd_release (abfd, core_datasec (abfd));
471 goto loser1;
472 }
473 core_reg2sec (abfd) = (asection *) bfd_zalloc (abfd, sizeof (asection));
474 if (core_reg2sec (abfd) == NULL) {
475 bfd_release (abfd, core_regsec (abfd));
476 goto loser2;
477 }
478
479 core_stacksec (abfd)->name = ".stack";
480 core_datasec (abfd)->name = ".data";
481 core_regsec (abfd)->name = ".reg";
482 core_reg2sec (abfd)->name = ".reg2";
483
484 core_stacksec (abfd)->flags = SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS;
485 core_datasec (abfd)->flags = SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS;
486 core_regsec (abfd)->flags = SEC_ALLOC + SEC_HAS_CONTENTS;
487 core_reg2sec (abfd)->flags = SEC_ALLOC + SEC_HAS_CONTENTS;
488
489 core_stacksec (abfd)->_raw_size = core->c_ssize;
490 core_datasec (abfd)->_raw_size = core->c_dsize;
491 core_regsec (abfd)->_raw_size = core->c_regs_size;
492 core_reg2sec (abfd)->_raw_size = core->fp_stuff_size;
493
494 core_stacksec (abfd)->vma = (core->c_stacktop - core->c_ssize);
495 core_datasec (abfd)->vma = N_DATADDR(core->c_aouthdr);
496 core_regsec (abfd)->vma = 0;
497 core_reg2sec (abfd)->vma = 0;
498
499 core_stacksec (abfd)->filepos = core->c_len + core->c_dsize;
500 core_datasec (abfd)->filepos = core->c_len;
501 /* We'll access the regs afresh in the core file, like any section: */
502 core_regsec (abfd)->filepos = (file_ptr)core->c_regs_pos;
503 core_reg2sec (abfd)->filepos = (file_ptr)core->fp_stuff_pos;
504
505 /* Align to word at least */
506 core_stacksec (abfd)->alignment_power = 2;
507 core_datasec (abfd)->alignment_power = 2;
508 core_regsec (abfd)->alignment_power = 2;
509 core_reg2sec (abfd)->alignment_power = 2;
510
511 abfd->sections = core_stacksec (abfd);
512 core_stacksec (abfd)->next = core_datasec (abfd);
513 core_datasec (abfd)->next = core_regsec (abfd);
514 core_regsec (abfd)->next = core_reg2sec (abfd);
515
516 abfd->section_count = 4;
517
518 return abfd->xvec;
519 }
520
521 static char *sunos4_core_file_failing_command (abfd)
522 bfd *abfd;
523 {
524 return core_hdr (abfd)->hdr->c_cmdname;
525 }
526
527 static int
528 DEFUN(sunos4_core_file_failing_signal,(abfd),
529 bfd *abfd)
530 {
531 return core_hdr (abfd)->hdr->c_signo;
532 }
533
534 static boolean
535 DEFUN(sunos4_core_file_matches_executable_p, (core_bfd, exec_bfd),
536 bfd *core_bfd AND
537 bfd *exec_bfd)
538 {
539 if (core_bfd->xvec != exec_bfd->xvec) {
540 bfd_error = system_call_error;
541 return false;
542 }
543
544 return (memcmp ((char *)&((core_hdr (core_bfd)->hdr)->c_aouthdr),
545 (char *) exec_hdr (exec_bfd),
546 sizeof (struct internal_exec)) == 0) ? true : false;
547 }
548
549 #define MY_set_sizes sunos4_set_sizes
550 static boolean
551 DEFUN (sunos4_set_sizes, (abfd),
552 bfd *abfd)
553 {
554 switch (bfd_get_arch (abfd))
555 {
556 default:
557 return false;
558 case bfd_arch_sparc:
559 adata(abfd).page_size = 0x2000;
560 adata(abfd).segment_size = 0x2000;
561 adata(abfd).exec_bytes_size = EXEC_BYTES_SIZE;
562 return true;
563 case bfd_arch_m68k:
564 adata(abfd).page_size = 0x2000;
565 adata(abfd).segment_size = 0x20000;
566 adata(abfd).exec_bytes_size = EXEC_BYTES_SIZE;
567 return true;
568 }
569 }
570
571 static CONST struct aout_backend_data sunos4_aout_backend = {
572 0, 1, 0, sunos4_set_sizes, 0,
573 };
574 \f
575 #define MY_core_file_failing_command sunos4_core_file_failing_command
576 #define MY_core_file_failing_signal sunos4_core_file_failing_signal
577 #define MY_core_file_matches_executable_p sunos4_core_file_matches_executable_p
578
579 #define MY_bfd_debug_info_start bfd_void
580 #define MY_bfd_debug_info_end bfd_void
581 #define MY_bfd_debug_info_accumulate \
582 (void (*) PARAMS ((bfd *, struct sec *))) bfd_void
583 #define MY_core_file_p sunos4_core_file_p
584 #define MY_write_object_contents NAME(aout,sunos4_write_object_contents)
585 #define MY_backend_data &sunos4_aout_backend
586
587 #define TARGET_IS_BIG_ENDIAN_P
588
589 #include "aout-target.h"
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