bfd/aix386-core.c

   1 /* BFD back-end for AIX on PS/2 core files.
   2    This was based on trad-core.c, which was written by John Gilmore of
   3         Cygnus Support.
   4    Copyright 1988, 1989, 1991, 1992, 1993, 1994, 1996, 1998, 1999, 2000
   5    Free Software Foundation, Inc.
   6    Written by Minh Tran-Le <TRANLE@INTELLICORP.COM>.
   7    Converted to back end form by Ian Lance Taylor <ian@cygnus.com>.
   8
   9 This file is part of BFD, the Binary File Descriptor library.
  10
  11 This program is free software; you can redistribute it and/or modify
  12 it under the terms of the GNU General Public License as published by
  13 the Free Software Foundation; either version 2 of the License, or
  14 (at your option) any later version.
  15
  16 This program is distributed in the hope that it will be useful,
  17 but WITHOUT ANY WARRANTY; without even the implied warranty of
  18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19 GNU General Public License for more details.
  20
  21 You should have received a copy of the GNU General Public License
  22 along with this program; if not, write to the Free Software
  23 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  24
  25 #include "bfd.h"
  26 #include "sysdep.h"
  27 #include "libbfd.h"
  28 #include "coff/i386.h"
  29 #include "coff/internal.h"
  30 #include "libcoff.h"
  31
  32 #include <signal.h>
  33
  34 #if defined (_AIX) && defined (_I386)
  35 #define NOCHECKS                /* This is for coredump.h.  */
  36 #define _h_USER                 /* Avoid including user.h from coredump.h.  */
  37 #include <uinfo.h>
  38 #include <sys/i386/coredump.h>
  39 #endif /* _AIX && _I386 */
  40
  41 /* Maybe this could work on some other i386 but I have not tried it
  42  * mtranle@paris - Tue Sep 24 12:49:35 1991
  43  */
  44
  45 #ifndef COR_MAGIC
  46 # define COR_MAGIC "core"
  47 #endif
  48
  49 /* Need this cast because ptr is really void *.  */
  50 #define core_hdr(bfd) \
  51     (((bfd->tdata.trad_core_data))->hdr)
  52 #define core_section(bfd,n) \
  53     (((bfd)->tdata.trad_core_data)->sections[n])
  54 #define core_regsec(bfd) \
  55     (((bfd)->tdata.trad_core_data)->reg_section)
  56 #define core_reg2sec(bfd) \
  57     (((bfd)->tdata.trad_core_data)->reg2_section)
  58
  59 /* These are stored in the bfd's tdata.  */
  60 struct trad_core_struct {
  61   struct corehdr *hdr;          /* core file header */
  62   asection *reg_section;
  63   asection *reg2_section;
  64   asection *sections[MAX_CORE_SEGS];
  65 };
  66
  67 static void swap_abort PARAMS ((void));
  68
  69 static const bfd_target *
  70 aix386_core_file_p (abfd)
  71      bfd *abfd;
  72 {
  73   int i, n;
  74   unsigned char longbuf[4];     /* Raw bytes of various header fields */
  75   int core_size = sizeof (struct corehdr);
  76   struct corehdr *core;
  77   struct mergem {
  78     struct trad_core_struct coredata;
  79     struct corehdr internal_core;
  80   } *mergem;
  81
  82   if (bfd_read ((PTR) longbuf, 1, sizeof (longbuf), abfd) != sizeof (longbuf))
  83     {
  84       if (bfd_get_error () != bfd_error_system_call)
  85         bfd_set_error (bfd_error_wrong_format);
  86       return 0;
  87     }
  88
  89   if (strncmp (longbuf, COR_MAGIC, 4))
  90     return 0;
  91
  92   if (bfd_seek (abfd, 0L, false) < 0)
  93     return 0;
  94
  95   mergem = (struct mergem *) bfd_zalloc (abfd, sizeof (struct mergem));
  96   if (mergem == NULL)
  97     return 0;
  98
  99   core = &mergem->internal_core;
 100
 101   if ((bfd_read ((PTR) core, 1, core_size, abfd)) != core_size)
 102     {
 103       if (bfd_get_error () != bfd_error_system_call)
 104         bfd_set_error (bfd_error_wrong_format);
 105       bfd_release (abfd, (char *) mergem);
 106       return 0;
 107     }
 108
 109   set_tdata (abfd, &mergem->coredata);
 110   core_hdr (abfd) = core;
 111
 112   /* Create the sections.  This is raunchy, but bfd_close wants to
 113      reclaim them.  */
 114   core_regsec (abfd) = (asection *) bfd_zalloc (abfd, sizeof (asection));
 115   if (core_regsec (abfd) == NULL)
 116     {
 117     loser:
 118       bfd_release (abfd, (char *) mergem);
 119       return 0;
 120     }
 121   core_reg2sec (abfd) = (asection *) bfd_zalloc (abfd, sizeof (asection));
 122   if (core_reg2sec (abfd) == NULL)
 123     {
 124     loser1:
 125       bfd_release (abfd, core_regsec (abfd));
 126       goto loser;
 127     }
 128
 129   for (i = 0, n = 0; (i < MAX_CORE_SEGS) && (core->cd_segs[i].cs_type); i++)
 130     {
 131       if (core->cd_segs[i].cs_offset == 0)
 132         continue;
 133       core_section (abfd, n) =
 134         (asection *) bfd_zalloc (abfd, sizeof (asection));
 135       if (core_section (abfd, n) == NULL)
 136         {
 137           int j;
 138           if (n > 0)
 139             {
 140               for (j = 0; j < n; j++)
 141                 bfd_release (abfd, core_section (abfd, j));
 142             }
 143           bfd_release (abfd, (char *) mergem);
 144           goto loser1;
 145         }
 146
 147       switch (core->cd_segs[i].cs_type)
 148         {
 149         case COR_TYPE_DATA:
 150           core_section (abfd, n)->name = ".data";
 151           core_section (abfd, n)->flags = (SEC_ALLOC + SEC_LOAD +
 152                                            SEC_HAS_CONTENTS);
 153           break;
 154         case COR_TYPE_STACK:
 155           core_section (abfd, n)->name = ".stack";
 156           core_section (abfd, n)->flags = (SEC_ALLOC + SEC_LOAD +
 157                                            SEC_HAS_CONTENTS);
 158           break;
 159         case COR_TYPE_LIBDATA:
 160           core_section (abfd, n)->name = ".libdata";
 161           core_section (abfd, n)->flags = (SEC_ALLOC + SEC_HAS_CONTENTS);
 162           break;
 163         case COR_TYPE_WRITE:
 164           core_section (abfd, n)->name = ".writeable";
 165           core_section (abfd, n)->flags = (SEC_ALLOC + SEC_HAS_CONTENTS);
 166           break;
 167         case COR_TYPE_MSC:
 168           core_section (abfd, n)->name = ".misc";
 169           core_section (abfd, n)->flags = (SEC_ALLOC + SEC_HAS_CONTENTS);
 170           break;
 171         default:
 172           core_section (abfd, n)->name = ".unknown";
 173           core_section (abfd, n)->flags = (SEC_ALLOC + SEC_HAS_CONTENTS);
 174           break;
 175         }
 176       core_section (abfd, n)->_raw_size = core->cd_segs[i].cs_len;
 177       core_section (abfd, n)->vma       = core->cd_segs[i].cs_address;
 178       core_section (abfd, n)->filepos   = core->cd_segs[i].cs_offset;
 179       core_section (abfd, n)->alignment_power = 2;
 180       core_section (abfd, n)->next      = NULL;
 181       if (n > 0)
 182         core_section (abfd, (n - 1))->next = core_section (abfd, n);
 183
 184       abfd->section_count = ++n;
 185     }
 186
 187   core_regsec (abfd)->name = ".reg";
 188   core_reg2sec (abfd)->name = ".reg2";
 189
 190   core_regsec (abfd)->flags = SEC_HAS_CONTENTS;
 191   core_reg2sec (abfd)->flags = SEC_HAS_CONTENTS;
 192
 193   core_regsec (abfd)->_raw_size = sizeof (core->cd_regs);
 194   core_reg2sec (abfd)->_raw_size = sizeof (core->cd_fpregs);
 195
 196   core_regsec (abfd)->vma = -1;
 197   core_reg2sec (abfd)->vma = -1;
 198
 199   /* We'll access the regs afresh in the core file, like any section.  */
 200   core_regsec (abfd)->filepos =
 201     (file_ptr) offsetof (struct corehdr, cd_regs[0]);
 202   core_reg2sec (abfd)->filepos =
 203     (file_ptr) offsetof (struct corehdr, cd_fpregs);
 204
 205   /* Add the 2 reg fake sections to abfd.  */
 206   abfd->section_count += 2;
 207   abfd->sections = core_regsec (abfd);
 208   core_regsec (abfd)->next = core_reg2sec (abfd);
 209   core_reg2sec (abfd)->next = core_section (abfd, 0);
 210
 211   return abfd->xvec;
 212 }
 213
 214 static char *
 215 aix386_core_file_failing_command (abfd)
 216      bfd *abfd;
 217 {
 218   return core_hdr (abfd)->cd_comm;
 219 }
 220
 221 static int
 222 aix386_core_file_failing_signal (abfd)
 223      bfd *abfd;
 224 {
 225   return core_hdr (abfd)->cd_cursig;
 226 }
 227
 228 static boolean
 229 aix386_core_file_matches_executable_p (core_bfd, exec_bfd)
 230      bfd *core_bfd;
 231      bfd *exec_bfd;
 232 {
 233   /* FIXME: We have no way of telling at this point.  */
 234   return true;
 235 }
 236
 237 /* If somebody calls any byte-swapping routines, shoot them.  */
 238
 239 static void
 240 swap_abort ()
 241 {
 242   /* This way doesn't require any declaration for ANSI to fuck up.  */
 243   abort ();
 244 }
 245
 246 #define NO_GET  ((PROTO(bfd_vma, (*), (       const bfd_byte *))) swap_abort )
 247 #define NO_GETS ((PROTO(bfd_signed_vma, (*), (const bfd_byte *))) swap_abort )
 248 #define NO_PUT  ((PROTO(void,        (*), (bfd_vma, bfd_byte *))) swap_abort )
 249
 250 const bfd_target aix386_core_vec = {
 251   "aix386-core",
 252   bfd_target_unknown_flavour,
 253   BFD_ENDIAN_BIG,               /* target byte order */
 254   BFD_ENDIANG_BIG,              /* target headers byte order */
 255   (HAS_RELOC | EXEC_P |         /* object flags */
 256    HAS_LINENO | HAS_DEBUG |
 257    HAS_SYMS | HAS_LOCALS | WP_TEXT),
 258
 259   (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
 260   0,                            /* leading underscore */
 261   ' ',                          /* ar_pad_char */
 262   16,                           /* ar_max_namelen */
 263   NO_GET, NO_GETS, NO_PUT,
 264   NO_GET, NO_GETS, NO_PUT,
 265   NO_GET, NO_GETS, NO_PUT,      /* data */
 266   NO_GET, NO_GETS, NO_PUT,
 267   NO_GET, NO_GETS, NO_PUT,
 268   NO_GET, NO_GETS, NO_PUT,      /* hdrs */
 269
 270   {_bfd_dummy_target, _bfd_dummy_target,
 271    _bfd_dummy_target, aix386_core_file_p},
 272   {bfd_false, bfd_false,        /* bfd_create_object */
 273    bfd_false, bfd_false},
 274   {bfd_false, bfd_false,        /* bfd_write_contents */
 275    bfd_false, bfd_false},
 276
 277   BFD_JUMP_TABLE_GENERIC (_bfd_generic),
 278   BFD_JUMP_TABLE_COPY (_bfd_generic),
 279   BFD_JUMP_TABLE_CORE (aix386),
 280   BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive),
 281   BFD_JUMP_TABLE_SYMBOLS (_bfd_nosymbols),
 282   BFD_JUMP_TABLE_RELOCS (_bfd_norelocs),
 283   BFD_JUMP_TABLE_WRITE (_bfd_generic),
 284   BFD_JUMP_TABLE_LINK (_bfd_nolink),
 285   BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
 286
 287   NULL,
 288
 289   (PTR) 0
 290 };