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 #define core_hdr(bfd) ((CoreHdr *) bfd->tdata.any)
76 /* AIX 4.1 changed the names and locations of a few items in the core file.
77 AIX 4.3 defined an entirely new structure, core_dumpx, but kept support for
78 the previous 4.1 structure, core_dump.
80 AIX_CORE_DUMPX_CORE is defined (by configure) on AIX 4.3+, and
81 CORE_VERSION_1 is defined (by AIX core.h) as 2 on AIX 4.3+ and as 1 on AIX
82 4.1 and 4.2. AIX pre-4.1 (aka 3.x) either doesn't define CORE_VERSION_1
83 or else defines it as 0. */
85 #if defined(CORE_VERSION_1) && !CORE_VERSION_1
86 # undef CORE_VERSION_1
89 /* The following union and macros allow this module to compile on all AIX
90 versions and to handle both core_dumpx and core_dump on 4.3+. CNEW_*()
91 and COLD_*() macros respectively retrieve core_dumpx and core_dump
94 /* Union of 32-bit and 64-bit versions of ld_info. */
98 struct __ld_info32 l32;
99 struct __ld_info64 l64;
106 /* Union of old and new core dump structures. */
109 #ifdef AIX_CORE_DUMPX_CORE
110 struct core_dumpx new; /* new AIX 4.3+ core dump */
112 struct core_dump new; /* for simpler coding */
114 struct core_dump old; /* old AIX 4.2- core dump, still used on
115 4.3+ with appropriate SMIT config */
118 /* Union of old and new vm_info structures. */
120 #ifdef CORE_VERSION_1
122 #ifdef AIX_CORE_DUMPX_CORE
131 /* Return whether CoreHdr C is in new or old format. */
133 #ifdef AIX_CORE_DUMPX_CORE
134 # define CORE_NEW(c) (!(c).old.c_entries)
136 # define CORE_NEW(c) 0
139 /* Return the c_stackorg field from struct core_dumpx C. */
141 #ifdef AIX_CORE_DUMPX_CORE
142 # define CNEW_STACKORG(c) (c).c_stackorg
144 # define CNEW_STACKORG(c) 0
147 /* Return the offset to the loader region from struct core_dump C. */
149 #ifdef AIX_CORE_DUMPX_CORE
150 # define CNEW_LOADER(c) (c).c_loader
152 # define CNEW_LOADER(c) 0
155 /* Return the offset to the loader region from struct core_dump C. */
157 #define COLD_LOADER(c) (c).c_tab
159 /* Return the c_lsize field from struct core_dumpx C. */
161 #ifdef AIX_CORE_DUMPX_CORE
162 # define CNEW_LSIZE(c) (c).c_lsize
164 # define CNEW_LSIZE(c) 0
167 /* Return the c_dataorg field from struct core_dumpx C. */
169 #ifdef AIX_CORE_DUMPX_CORE
170 # define CNEW_DATAORG(c) (c).c_dataorg
172 # define CNEW_DATAORG(c) 0
175 /* Return the c_datasize field from struct core_dumpx C. */
177 #ifdef AIX_CORE_DUMPX_CORE
178 # define CNEW_DATASIZE(c) (c).c_datasize
180 # define CNEW_DATASIZE(c) 0
183 /* Return the c_impl field from struct core_dumpx C. */
185 #if defined (HAVE_ST_C_IMPL) || defined (AIX_5_CORE)
186 # define CNEW_IMPL(c) (c).c_impl
188 # define CNEW_IMPL(c) 0
191 /* Return the command string from struct core_dumpx C. */
193 #ifdef AIX_CORE_DUMPX_CORE
194 # define CNEW_COMM(c) (c).c_u.U_proc.pi_comm
196 # define CNEW_COMM(c) 0
199 /* Return the command string from struct core_dump C. */
201 #ifdef CORE_VERSION_1
202 # define COLD_COMM(c) (c).c_u.U_comm
204 # define COLD_COMM(c) (c).c_u.u_comm
207 /* Return the struct __context64 pointer from struct core_dumpx C. */
209 #ifdef AIX_CORE_DUMPX_CORE
210 # define CNEW_CONTEXT64(c) (c).c_flt.hctx.r64
212 # define CNEW_CONTEXT64(c) c
215 /* Return the struct mstsave pointer from struct core_dumpx C. */
217 #ifdef AIX_CORE_DUMPX_CORE
218 # define CNEW_MSTSAVE(c) (c).c_flt.hctx.r32
220 # define CNEW_MSTSAVE(c) c
223 /* Return the struct mstsave pointer from struct core_dump C. */
225 #ifdef CORE_VERSION_1
226 # define COLD_MSTSAVE(c) (c).c_mst
228 # define COLD_MSTSAVE(c) (c).c_u.u_save
231 /* Return whether struct core_dumpx is from a 64-bit process. */
233 #ifdef AIX_CORE_DUMPX_CORE
234 # define CNEW_PROC64(c) IS_PROC64(&(c).c_u.U_proc)
236 # define CNEW_PROC64(c) 0
239 /* Magic end-of-stack addresses for old core dumps. This is _very_ fragile,
240 but I don't see any easy way to get that info right now. */
242 #ifdef CORE_VERSION_1
243 # define COLD_STACKEND 0x2ff23000
245 # define COLD_STACKEND 0x2ff80000
248 /* Size of the leading portion that old and new core dump structures have in
250 #define CORE_COMMONSZ ((int) &((struct core_dump *) 0)->c_entries \
251 + sizeof (((struct core_dump *) 0)->c_entries))
253 /* Try to read into CORE the header from the core file associated with ABFD.
257 read_hdr (bfd *abfd, CoreHdr *core)
261 if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0)
264 /* Read the leading portion that old and new core dump structures have in
266 size = CORE_COMMONSZ;
267 if (bfd_bread (core, size, abfd) != size)
270 /* Read the trailing portion of the structure. */
271 if (CORE_NEW (*core))
272 size = sizeof (core->new);
274 size = sizeof (core->old);
275 size -= CORE_COMMONSZ;
276 return bfd_bread ((char *) core + CORE_COMMONSZ, size, abfd) == size;
280 make_bfd_asection (abfd, name, flags, size, vma, filepos)
290 asect = bfd_make_section_anyway (abfd, name);
294 asect->flags = flags;
297 asect->filepos = filepos;
298 asect->alignment_power = 8;
303 /* Decide if a given bfd represents a `core' file or not. There really is no
304 magic number or anything like, in rs6000coff. */
307 rs6000coff_core_p (abfd)
315 /* Values from new and old core structures. */
317 file_ptr c_stack, c_regoff, c_loader;
318 bfd_size_type c_size, c_regsize, c_lsize;
323 if (!read_hdr (abfd, &core))
325 if (bfd_get_error () != bfd_error_system_call)
326 bfd_set_error (bfd_error_wrong_format);
330 /* Copy fields from new or old core structure. */
333 c_flag = core.new.c_flag;
334 c_stack = (file_ptr) core.new.c_stack;
335 c_size = core.new.c_size;
336 c_stackend = CNEW_STACKORG (core.new) + c_size;
337 c_lsize = CNEW_LSIZE (core.new);
338 c_loader = CNEW_LOADER (core.new);
339 proc64 = CNEW_PROC64 (core.new);
343 c_flag = core.old.c_flag;
344 c_stack = (file_ptr) core.old.c_stack;
345 c_size = core.old.c_size;
346 c_stackend = COLD_STACKEND;
348 c_loader = (file_ptr) COLD_LOADER (core.old);
354 c_regsize = sizeof (CNEW_CONTEXT64 (core.new));
355 c_regptr = &CNEW_CONTEXT64 (core.new);
357 else if (CORE_NEW (core))
359 c_regsize = sizeof (CNEW_MSTSAVE (core.new));
360 c_regptr = &CNEW_MSTSAVE (core.new);
364 c_regsize = sizeof (COLD_MSTSAVE (core.old));
365 c_regptr = &COLD_MSTSAVE (core.old);
367 c_regoff = (char *) c_regptr - (char *) &core;
369 if (bfd_stat (abfd, &statbuf) < 0)
371 bfd_set_error (bfd_error_system_call);
375 /* If the core file ulimit is too small, the system will first
376 omit the data segment, then omit the stack, then decline to
377 dump core altogether (as far as I know UBLOCK_VALID and LE_VALID
378 are always set) (this is based on experimentation on AIX 3.2).
379 Now, the thing is that GDB users will be surprised
380 if segments just silently don't appear (well, maybe they would
381 think to check "info files", I don't know).
383 For the data segment, we have no choice but to keep going if it's
384 not there, since the default behavior is not to dump it (regardless
385 of the ulimit, it's based on SA_FULLDUMP). But for the stack segment,
386 if it's not there, we refuse to have anything to do with this core
387 file. The usefulness of a core dump without a stack segment is pretty
390 if (!(c_flag & UBLOCK_VALID)
391 || !(c_flag & LE_VALID))
393 bfd_set_error (bfd_error_wrong_format);
397 if (!(c_flag & USTACK_VALID))
399 bfd_set_error (bfd_error_file_truncated);
403 /* Don't check the core file size for a full core, AIX 4.1 includes
404 additional shared library sections in a full core. */
405 if (!(c_flag & (FULL_CORE | CORE_TRUNC)))
407 /* If the size is wrong, it means we're misinterpreting something. */
408 if (c_stack + (file_ptr) c_size != statbuf.st_size)
410 bfd_set_error (bfd_error_wrong_format);
415 /* Sanity check on the c_tab field. */
416 if (!CORE_NEW (core) && (c_loader < (file_ptr) sizeof core.old ||
417 c_loader >= statbuf.st_size ||
418 c_loader >= c_stack))
420 bfd_set_error (bfd_error_wrong_format);
424 /* Issue warning if the core file was truncated during writing. */
425 if (c_flag & CORE_TRUNC)
426 (*_bfd_error_handler) (_("%s: warning core file truncated"),
427 bfd_get_filename (abfd));
429 /* Allocate core file header. */
430 size = CORE_NEW (core) ? sizeof (core.new) : sizeof (core.old);
431 tmpptr = (char *) bfd_zalloc (abfd, (bfd_size_type) size);
435 /* Copy core file header. */
436 memcpy (tmpptr, &core, size);
437 set_tdata (abfd, tmpptr);
439 /* Set architecture. */
442 enum bfd_architecture arch;
445 switch (CNEW_IMPL (core.new))
450 arch = bfd_arch_rs6000;
451 mach = bfd_mach_rs6k;
454 arch = bfd_arch_powerpc;
458 bfd_default_set_arch_mach (abfd, arch, mach);
461 /* .stack section. */
462 if (!make_bfd_asection (abfd, ".stack",
463 SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS,
464 c_size, c_stackend - c_size, c_stack))
467 /* .reg section for all registers. */
468 if (!make_bfd_asection (abfd, ".reg",
470 c_regsize, (bfd_vma) 0, c_regoff))
474 To actually find out how long this section is in this particular
475 core dump would require going down the whole list of struct ld_info's.
476 See if we can just fake it. */
477 if (!make_bfd_asection (abfd, ".ldinfo",
479 c_lsize, (bfd_vma) 0, c_loader))
482 #ifndef CORE_VERSION_1
483 /* .data section if present.
484 AIX 3 dumps the complete data section and sets FULL_CORE if the
485 ulimit is large enough, otherwise the data section is omitted.
486 AIX 4 sets FULL_CORE even if the core file is truncated, we have
487 to examine core.c_datasize below to find out the actual size of
488 the .data section. */
489 if (c_flag & FULL_CORE)
491 if (!make_bfd_asection (abfd, ".data",
492 SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS,
493 (bfd_size_type) core.old.c_u.u_dsize,
495 CDATA_ADDR (core.old.c_u.u_dsize),
501 #ifdef CORE_VERSION_1
502 /* AIX 4 adds data sections from loaded objects to the core file,
503 which can be found by examining ldinfo, and anonymously mmapped
507 bfd_size_type ldi_datasize;
512 /* Fields from new and old core structures. */
513 bfd_size_type c_datasize, c_vmregions;
514 file_ptr c_data, c_vmm;
518 c_datasize = CNEW_DATASIZE (core.new);
519 c_data = (file_ptr) core.new.c_data;
520 c_vmregions = core.new.c_vmregions;
521 c_vmm = (file_ptr) core.new.c_vmm;
525 c_datasize = core.old.c_datasize;
526 c_data = (file_ptr) core.old.c_data;
527 c_vmregions = core.old.c_vmregions;
528 c_vmm = (file_ptr) core.old.c_vmm;
531 /* .data section from executable. */
534 if (!make_bfd_asection (abfd, ".data",
535 SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS,
537 (bfd_vma) CDATA_ADDR (c_datasize),
542 /* .data sections from loaded objects. */
544 size = (int) ((LdInfo *) 0)->l64.ldinfo_filename;
546 size = (int) ((LdInfo *) 0)->l32.ldinfo_filename;
550 if (bfd_seek (abfd, c_loader, SEEK_SET) != 0)
552 if (bfd_bread (&ldinfo, size, abfd) != size)
557 ldi_core = ldinfo.l64.ldinfo_core;
558 ldi_datasize = ldinfo.l64.ldinfo_datasize;
559 ldi_dataorg = (bfd_vma) ldinfo.l64.ldinfo_dataorg;
560 ldi_next = ldinfo.l64.ldinfo_next;
564 ldi_core = ldinfo.l32.ldinfo_core;
565 ldi_datasize = ldinfo.l32.ldinfo_datasize;
566 ldi_dataorg = (bfd_vma) (long) ldinfo.l32.ldinfo_dataorg;
567 ldi_next = ldinfo.l32.ldinfo_next;
571 if (!make_bfd_asection (abfd, ".data",
572 SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS,
573 ldi_datasize, ldi_dataorg, ldi_core))
578 c_loader += ldi_next;
581 /* .vmdata sections from anonymously mmapped regions. */
586 if (bfd_seek (abfd, c_vmm, SEEK_SET) != 0)
589 for (i = 0; i < c_vmregions; i++)
592 bfd_size_type vminfo_size;
593 file_ptr vminfo_offset;
596 size = CORE_NEW (core) ? sizeof (vminfo.new) : sizeof (vminfo.old);
597 if (bfd_bread (&vminfo, size, abfd) != size)
602 vminfo_addr = (bfd_vma) vminfo.new.vminfo_addr;
603 vminfo_size = vminfo.new.vminfo_size;
604 vminfo_offset = vminfo.new.vminfo_offset;
608 vminfo_addr = (bfd_vma) (long) vminfo.old.vminfo_addr;
609 vminfo_size = vminfo.old.vminfo_size;
610 vminfo_offset = vminfo.old.vminfo_offset;
614 if (!make_bfd_asection (abfd, ".vmdata",
615 SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS,
616 vminfo_size, vminfo_addr,
624 return abfd->xvec; /* This is garbage for now. */
627 bfd_release (abfd, abfd->tdata.any);
628 abfd->tdata.any = NULL;
629 bfd_section_list_clear (abfd);
633 /* Return `TRUE' if given core is from the given executable. */
636 rs6000coff_core_file_matches_executable_p (core_bfd, exec_bfd)
644 const char *str1, *str2;
648 if (!read_hdr (core_bfd, &core))
652 c_loader = CNEW_LOADER (core.new);
654 c_loader = (file_ptr) COLD_LOADER (core.old);
656 if (CORE_NEW (core) && CNEW_PROC64 (core.new))
657 size = (int) ((LdInfo *) 0)->l64.ldinfo_filename;
659 size = (int) ((LdInfo *) 0)->l32.ldinfo_filename;
661 if (bfd_seek (core_bfd, c_loader + size, SEEK_SET) != 0)
665 path = bfd_malloc ((bfd_size_type) alloc);
672 if (bfd_bread (s, (bfd_size_type) 1, core_bfd) != 1)
680 if (s == path + alloc)
685 n = bfd_realloc (path, (bfd_size_type) alloc);
696 str1 = strrchr (path, '/');
697 str2 = strrchr (exec_bfd->filename, '/');
699 /* step over character '/' */
700 str1 = str1 != NULL ? str1 + 1 : path;
701 str2 = str2 != NULL ? str2 + 1 : exec_bfd->filename;
703 if (strcmp (str1, str2) == 0)
714 rs6000coff_core_file_failing_command (abfd)
717 CoreHdr *core = core_hdr (abfd);
718 char *com = CORE_NEW (*core) ?
719 CNEW_COMM (core->new) : COLD_COMM (core->old);
728 rs6000coff_core_file_failing_signal (abfd)
731 CoreHdr *core = core_hdr (abfd);
732 return CORE_NEW (*core) ? core->new.c_signo : core->old.c_signo;
735 #endif /* AIX_CORE */