1 /* IBM RS/6000 "XCOFF" back-end for BFD.
2 Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 2000,
4 Free Software Foundation, Inc.
5 FIXME: Can someone provide a transliteration of this name into ASCII?
6 Using the following chars caused a compiler warning on HIUX (so I replaced
7 them with octal escapes), and isn't useful without an understanding of what
9 Written by Metin G. Ozisik, Mimi Ph\373\364ng-Th\345o V\365,
11 Archive support from Damon A. Permezel.
12 Contributed by IBM Corporation and Cygnus Support.
14 This file is part of BFD, the Binary File Descriptor library.
16 This program is free software; you can redistribute it and/or modify
17 it under the terms of the GNU General Public License as published by
18 the Free Software Foundation; either version 2 of the License, or
19 (at your option) any later version.
21 This program is distributed in the hope that it will be useful,
22 but WITHOUT ANY WARRANTY; without even the implied warranty of
23 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
24 GNU General Public License for more details.
26 You should have received a copy of the GNU General Public License
27 along with this program; if not, write to the Free Software
28 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
30 /* This port currently only handles reading object files, except when
31 compiled on an RS/6000 host. -- no archive support, no core files.
32 In all cases, it does not support writing.
34 This is in a separate file from coff-rs6000.c, because it includes
35 system include files that conflict with coff/rs6000.h. */
37 /* Internalcoff.h and coffcode.h modify themselves based on this flag. */
38 #define RS6000COFF_C 1
40 /* The AIX 4.1 kernel is obviously compiled with -D_LONG_LONG, so
41 we have to define _LONG_LONG for older versions of gcc to get the
42 proper alignments in the user structure. */
43 #if defined(_AIX41) && !defined(_LONG_LONG)
53 /* AOUTHDR is defined by the above. We need another defn of it, from the
54 system include files. Punt the old one and get us a new name for the
55 typedef in the system include files. */
59 #define AOUTHDR second_AOUTHDR
63 /* ------------------------------------------------------------------------ */
64 /* Support for core file stuff.. */
65 /* ------------------------------------------------------------------------ */
68 #define __LDINFO_PTRACE32__ /* for __ld_info32 */
69 #define __LDINFO_PTRACE64__ /* for __ld_info64 */
72 #include <sys/systemcfg.h>
74 /* Borrowed from <sys/inttypes.h> on recent AIX versions. */
75 typedef unsigned long ptr_to_uint;
77 #define core_hdr(bfd) ((CoreHdr *) bfd->tdata.any)
79 /* AIX 4.1 changed the names and locations of a few items in the core file.
80 AIX 4.3 defined an entirely new structure, core_dumpx, but kept support for
81 the previous 4.1 structure, core_dump.
83 AIX_CORE_DUMPX_CORE is defined (by configure) on AIX 4.3+, and
84 CORE_VERSION_1 is defined (by AIX core.h) as 2 on AIX 4.3+ and as 1 on AIX
85 4.1 and 4.2. AIX pre-4.1 (aka 3.x) either doesn't define CORE_VERSION_1
86 or else defines it as 0. */
88 #if defined(CORE_VERSION_1) && !CORE_VERSION_1
89 # undef CORE_VERSION_1
92 /* The following union and macros allow this module to compile on all AIX
93 versions and to handle both core_dumpx and core_dump on 4.3+. CNEW_*()
94 and COLD_*() macros respectively retrieve core_dumpx and core_dump
97 /* Union of 32-bit and 64-bit versions of ld_info. */
101 struct __ld_info32 l32;
102 struct __ld_info64 l64;
109 /* Union of old and new core dump structures. */
112 #ifdef AIX_CORE_DUMPX_CORE
113 struct core_dumpx new; /* new AIX 4.3+ core dump */
115 struct core_dump new; /* for simpler coding */
117 struct core_dump old; /* old AIX 4.2- core dump, still used on
118 4.3+ with appropriate SMIT config */
121 /* Union of old and new vm_info structures. */
123 #ifdef CORE_VERSION_1
125 #ifdef AIX_CORE_DUMPX_CORE
134 /* Return whether CoreHdr C is in new or old format. */
136 #ifdef AIX_CORE_DUMPX_CORE
137 # define CORE_NEW(c) (!(c).old.c_entries)
139 # define CORE_NEW(c) 0
142 /* Return the c_stackorg field from struct core_dumpx C. */
144 #ifdef AIX_CORE_DUMPX_CORE
145 # define CNEW_STACKORG(c) (c).c_stackorg
147 # define CNEW_STACKORG(c) 0
150 /* Return the offset to the loader region from struct core_dump C. */
152 #ifdef AIX_CORE_DUMPX_CORE
153 # define CNEW_LOADER(c) (c).c_loader
155 # define CNEW_LOADER(c) 0
158 /* Return the offset to the loader region from struct core_dump C. */
160 #define COLD_LOADER(c) (c).c_tab
162 /* Return the c_lsize field from struct core_dumpx C. */
164 #ifdef AIX_CORE_DUMPX_CORE
165 # define CNEW_LSIZE(c) (c).c_lsize
167 # define CNEW_LSIZE(c) 0
170 /* Return the c_dataorg field from struct core_dumpx C. */
172 #ifdef AIX_CORE_DUMPX_CORE
173 # define CNEW_DATAORG(c) (c).c_dataorg
175 # define CNEW_DATAORG(c) 0
178 /* Return the c_datasize field from struct core_dumpx C. */
180 #ifdef AIX_CORE_DUMPX_CORE
181 # define CNEW_DATASIZE(c) (c).c_datasize
183 # define CNEW_DATASIZE(c) 0
186 /* Return the c_impl field from struct core_dumpx C. */
188 #if defined (HAVE_ST_C_IMPL) || defined (AIX_5_CORE)
189 # define CNEW_IMPL(c) (c).c_impl
191 # define CNEW_IMPL(c) 0
194 /* Return the command string from struct core_dumpx C. */
196 #ifdef AIX_CORE_DUMPX_CORE
197 # define CNEW_COMM(c) (c).c_u.U_proc.pi_comm
199 # define CNEW_COMM(c) 0
202 /* Return the command string from struct core_dump C. */
204 #ifdef CORE_VERSION_1
205 # define COLD_COMM(c) (c).c_u.U_comm
207 # define COLD_COMM(c) (c).c_u.u_comm
210 /* Return the struct __context64 pointer from struct core_dumpx C. */
212 #ifdef AIX_CORE_DUMPX_CORE
213 # define CNEW_CONTEXT64(c) (c).c_flt.hctx.r64
215 # define CNEW_CONTEXT64(c) c
218 /* Return the struct mstsave pointer from struct core_dumpx C. */
220 #ifdef AIX_CORE_DUMPX_CORE
221 # define CNEW_MSTSAVE(c) (c).c_flt.hctx.r32
223 # define CNEW_MSTSAVE(c) c
226 /* Return the struct mstsave pointer from struct core_dump C. */
228 #ifdef CORE_VERSION_1
229 # define COLD_MSTSAVE(c) (c).c_mst
231 # define COLD_MSTSAVE(c) (c).c_u.u_save
234 /* Return whether struct core_dumpx is from a 64-bit process. */
236 #ifdef AIX_CORE_DUMPX_CORE
237 # define CNEW_PROC64(c) IS_PROC64(&(c).c_u.U_proc)
239 # define CNEW_PROC64(c) 0
242 /* Magic end-of-stack addresses for old core dumps. This is _very_ fragile,
243 but I don't see any easy way to get that info right now. */
245 #ifdef CORE_VERSION_1
246 # define COLD_STACKEND 0x2ff23000
248 # define COLD_STACKEND 0x2ff80000
251 /* Size of the leading portion that old and new core dump structures have in
253 #define CORE_COMMONSZ ((int) &((struct core_dump *) 0)->c_entries \
254 + sizeof (((struct core_dump *) 0)->c_entries))
256 /* Define prototypes for certain functions, to avoid a compiler warning
257 saying that they are missing. */
259 const bfd_target * rs6000coff_core_p (bfd *abfd);
260 bfd_boolean rs6000coff_core_file_matches_executable_p (bfd *core_bfd,
262 char * rs6000coff_core_file_failing_command (bfd *abfd);
263 int rs6000coff_core_file_failing_signal (bfd *abfd);
265 /* Try to read into CORE the header from the core file associated with ABFD.
269 read_hdr (bfd *abfd, CoreHdr *core)
273 if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0)
276 /* Read the leading portion that old and new core dump structures have in
278 size = CORE_COMMONSZ;
279 if (bfd_bread (core, size, abfd) != size)
282 /* Read the trailing portion of the structure. */
283 if (CORE_NEW (*core))
284 size = sizeof (core->new);
286 size = sizeof (core->old);
287 size -= CORE_COMMONSZ;
288 return bfd_bread ((char *) core + CORE_COMMONSZ, size, abfd) == size;
292 make_bfd_asection (bfd *abfd, const char *name, flagword flags,
293 bfd_size_type size, bfd_vma vma, file_ptr filepos)
297 asect = bfd_make_section_anyway (abfd, name);
301 asect->flags = flags;
304 asect->filepos = filepos;
305 asect->alignment_power = 8;
310 /* Decide if a given bfd represents a `core' file or not. There really is no
311 magic number or anything like, in rs6000coff. */
314 rs6000coff_core_p (bfd *abfd)
321 /* Values from new and old core structures. */
323 file_ptr c_stack, c_regoff, c_loader;
324 bfd_size_type c_size, c_regsize, c_lsize;
329 if (!read_hdr (abfd, &core))
331 if (bfd_get_error () != bfd_error_system_call)
332 bfd_set_error (bfd_error_wrong_format);
336 /* Copy fields from new or old core structure. */
339 c_flag = core.new.c_flag;
340 c_stack = (file_ptr) core.new.c_stack;
341 c_size = core.new.c_size;
342 c_stackend = CNEW_STACKORG (core.new) + c_size;
343 c_lsize = CNEW_LSIZE (core.new);
344 c_loader = CNEW_LOADER (core.new);
345 proc64 = CNEW_PROC64 (core.new);
349 c_flag = core.old.c_flag;
350 c_stack = (file_ptr) (ptr_to_uint) core.old.c_stack;
351 c_size = core.old.c_size;
352 c_stackend = COLD_STACKEND;
354 c_loader = (file_ptr) (ptr_to_uint) COLD_LOADER (core.old);
360 c_regsize = sizeof (CNEW_CONTEXT64 (core.new));
361 c_regptr = &CNEW_CONTEXT64 (core.new);
363 else if (CORE_NEW (core))
365 c_regsize = sizeof (CNEW_MSTSAVE (core.new));
366 c_regptr = &CNEW_MSTSAVE (core.new);
370 c_regsize = sizeof (COLD_MSTSAVE (core.old));
371 c_regptr = &COLD_MSTSAVE (core.old);
373 c_regoff = (char *) c_regptr - (char *) &core;
375 if (bfd_stat (abfd, &statbuf) < 0)
377 bfd_set_error (bfd_error_system_call);
381 /* If the core file ulimit is too small, the system will first
382 omit the data segment, then omit the stack, then decline to
383 dump core altogether (as far as I know UBLOCK_VALID and LE_VALID
384 are always set) (this is based on experimentation on AIX 3.2).
385 Now, the thing is that GDB users will be surprised
386 if segments just silently don't appear (well, maybe they would
387 think to check "info files", I don't know).
389 For the data segment, we have no choice but to keep going if it's
390 not there, since the default behavior is not to dump it (regardless
391 of the ulimit, it's based on SA_FULLDUMP). But for the stack segment,
392 if it's not there, we refuse to have anything to do with this core
393 file. The usefulness of a core dump without a stack segment is pretty
396 if (!(c_flag & UBLOCK_VALID)
397 || !(c_flag & LE_VALID))
399 bfd_set_error (bfd_error_wrong_format);
403 if (!(c_flag & USTACK_VALID))
405 bfd_set_error (bfd_error_file_truncated);
409 /* Don't check the core file size for a full core, AIX 4.1 includes
410 additional shared library sections in a full core. */
411 if (!(c_flag & (FULL_CORE | CORE_TRUNC)))
413 /* If the size is wrong, it means we're misinterpreting something. */
414 if (c_stack + (file_ptr) c_size != statbuf.st_size)
416 bfd_set_error (bfd_error_wrong_format);
421 /* Sanity check on the c_tab field. */
422 if (!CORE_NEW (core) && (c_loader < (file_ptr) sizeof core.old ||
423 c_loader >= statbuf.st_size ||
424 c_loader >= c_stack))
426 bfd_set_error (bfd_error_wrong_format);
430 /* Issue warning if the core file was truncated during writing. */
431 if (c_flag & CORE_TRUNC)
432 (*_bfd_error_handler) (_("%s: warning core file truncated"),
433 bfd_get_filename (abfd));
435 /* Allocate core file header. */
436 size = CORE_NEW (core) ? sizeof (core.new) : sizeof (core.old);
437 tmpptr = (char *) bfd_zalloc (abfd, (bfd_size_type) size);
441 /* Copy core file header. */
442 memcpy (tmpptr, &core, size);
443 set_tdata (abfd, tmpptr);
445 /* Set architecture. */
448 enum bfd_architecture arch;
451 switch (CNEW_IMPL (core.new))
456 arch = bfd_arch_rs6000;
457 mach = bfd_mach_rs6k;
460 arch = bfd_arch_powerpc;
464 bfd_default_set_arch_mach (abfd, arch, mach);
467 /* .stack section. */
468 if (!make_bfd_asection (abfd, ".stack",
469 SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS,
470 c_size, c_stackend - c_size, c_stack))
473 /* .reg section for all registers. */
474 if (!make_bfd_asection (abfd, ".reg",
476 c_regsize, (bfd_vma) 0, c_regoff))
480 To actually find out how long this section is in this particular
481 core dump would require going down the whole list of struct ld_info's.
482 See if we can just fake it. */
483 if (!make_bfd_asection (abfd, ".ldinfo",
485 c_lsize, (bfd_vma) 0, c_loader))
488 #ifndef CORE_VERSION_1
489 /* .data section if present.
490 AIX 3 dumps the complete data section and sets FULL_CORE if the
491 ulimit is large enough, otherwise the data section is omitted.
492 AIX 4 sets FULL_CORE even if the core file is truncated, we have
493 to examine core.c_datasize below to find out the actual size of
494 the .data section. */
495 if (c_flag & FULL_CORE)
497 if (!make_bfd_asection (abfd, ".data",
498 SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS,
499 (bfd_size_type) core.old.c_u.u_dsize,
501 CDATA_ADDR (core.old.c_u.u_dsize),
507 #ifdef CORE_VERSION_1
508 /* AIX 4 adds data sections from loaded objects to the core file,
509 which can be found by examining ldinfo, and anonymously mmapped
513 bfd_size_type ldi_datasize;
518 /* Fields from new and old core structures. */
519 bfd_size_type c_datasize, c_vmregions;
520 file_ptr c_data, c_vmm;
524 c_datasize = CNEW_DATASIZE (core.new);
525 c_data = (file_ptr) core.new.c_data;
526 c_vmregions = core.new.c_vmregions;
527 c_vmm = (file_ptr) core.new.c_vmm;
531 c_datasize = core.old.c_datasize;
532 c_data = (file_ptr) (ptr_to_uint) core.old.c_data;
533 c_vmregions = core.old.c_vmregions;
534 c_vmm = (file_ptr) (ptr_to_uint) core.old.c_vmm;
537 /* .data section from executable. */
540 if (!make_bfd_asection (abfd, ".data",
541 SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS,
543 (bfd_vma) CDATA_ADDR (c_datasize),
548 /* .data sections from loaded objects. */
550 size = (int) ((LdInfo *) 0)->l64.ldinfo_filename;
552 size = (int) ((LdInfo *) 0)->l32.ldinfo_filename;
556 if (bfd_seek (abfd, c_loader, SEEK_SET) != 0)
558 if (bfd_bread (&ldinfo, size, abfd) != size)
563 ldi_core = ldinfo.l64.ldinfo_core;
564 ldi_datasize = ldinfo.l64.ldinfo_datasize;
565 ldi_dataorg = (bfd_vma) ldinfo.l64.ldinfo_dataorg;
566 ldi_next = ldinfo.l64.ldinfo_next;
570 ldi_core = ldinfo.l32.ldinfo_core;
571 ldi_datasize = ldinfo.l32.ldinfo_datasize;
572 ldi_dataorg = (bfd_vma) (long) ldinfo.l32.ldinfo_dataorg;
573 ldi_next = ldinfo.l32.ldinfo_next;
577 if (!make_bfd_asection (abfd, ".data",
578 SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS,
579 ldi_datasize, ldi_dataorg, ldi_core))
584 c_loader += ldi_next;
587 /* .vmdata sections from anonymously mmapped regions. */
592 if (bfd_seek (abfd, c_vmm, SEEK_SET) != 0)
595 for (i = 0; i < c_vmregions; i++)
598 bfd_size_type vminfo_size;
599 file_ptr vminfo_offset;
602 size = CORE_NEW (core) ? sizeof (vminfo.new) : sizeof (vminfo.old);
603 if (bfd_bread (&vminfo, size, abfd) != size)
608 vminfo_addr = (bfd_vma) vminfo.new.vminfo_addr;
609 vminfo_size = vminfo.new.vminfo_size;
610 vminfo_offset = vminfo.new.vminfo_offset;
614 vminfo_addr = (bfd_vma) (long) vminfo.old.vminfo_addr;
615 vminfo_size = vminfo.old.vminfo_size;
616 vminfo_offset = vminfo.old.vminfo_offset;
620 if (!make_bfd_asection (abfd, ".vmdata",
621 SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS,
622 vminfo_size, vminfo_addr,
630 return abfd->xvec; /* This is garbage for now. */
633 bfd_release (abfd, abfd->tdata.any);
634 abfd->tdata.any = NULL;
635 bfd_section_list_clear (abfd);
639 /* Return `TRUE' if given core is from the given executable. */
642 rs6000coff_core_file_matches_executable_p (bfd *core_bfd, bfd *exec_bfd)
648 const char *str1, *str2;
652 if (!read_hdr (core_bfd, &core))
656 c_loader = CNEW_LOADER (core.new);
658 c_loader = (file_ptr) (ptr_to_uint) COLD_LOADER (core.old);
660 if (CORE_NEW (core) && CNEW_PROC64 (core.new))
661 size = (int) ((LdInfo *) 0)->l64.ldinfo_filename;
663 size = (int) ((LdInfo *) 0)->l32.ldinfo_filename;
665 if (bfd_seek (core_bfd, c_loader + size, SEEK_SET) != 0)
669 path = bfd_malloc ((bfd_size_type) alloc);
676 if (bfd_bread (s, (bfd_size_type) 1, core_bfd) != 1)
684 if (s == path + alloc)
689 n = bfd_realloc (path, (bfd_size_type) alloc);
700 str1 = strrchr (path, '/');
701 str2 = strrchr (exec_bfd->filename, '/');
703 /* step over character '/' */
704 str1 = str1 != NULL ? str1 + 1 : path;
705 str2 = str2 != NULL ? str2 + 1 : exec_bfd->filename;
707 if (strcmp (str1, str2) == 0)
718 rs6000coff_core_file_failing_command (bfd *abfd)
720 CoreHdr *core = core_hdr (abfd);
721 char *com = CORE_NEW (*core) ?
722 CNEW_COMM (core->new) : COLD_COMM (core->old);
731 rs6000coff_core_file_failing_signal (bfd *abfd)
733 CoreHdr *core = core_hdr (abfd);
734 return CORE_NEW (*core) ? core->new.c_signo : core->old.c_signo;
737 #endif /* AIX_CORE */