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    2001
   6    Free Software Foundation, Inc.
   7    Written by Minh Tran-Le <TRANLE@INTELLICORP.COM>.
   8    Converted to back end form by Ian Lance Taylor <ian@cygnus.com>.
   9
  10 This file is part of BFD, the Binary File Descriptor library.
  11
  12 This program is free software; you can redistribute it and/or modify
  13 it under the terms of the GNU General Public License as published by
  14 the Free Software Foundation; either version 2 of the License, or
  15 (at your option) any later version.
  16
  17 This program is distributed in the hope that it will be useful,
  18 but WITHOUT ANY WARRANTY; without even the implied warranty of
  19 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20 GNU General Public License for more details.
  21
  22 You should have received a copy of the GNU General Public License
  23 along with this program; if not, write to the Free Software
  24 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  25
  26 #include "bfd.h"
  27 #include "sysdep.h"
  28 #include "libbfd.h"
  29 #include "coff/i386.h"
  30 #include "coff/internal.h"
  31 #include "libcoff.h"
  32
  33 #include <signal.h>
  34
  35 #if defined (_AIX) && defined (_I386)
  36 #define NOCHECKS                /* This is for coredump.h.  */
  37 #define _h_USER                 /* Avoid including user.h from coredump.h.  */
  38 #include <uinfo.h>
  39 #include <sys/i386/coredump.h>
  40 #endif /* _AIX && _I386 */
  41
  42 /* Maybe this could work on some other i386 but I have not tried it
  43  * mtranle@paris - Tue Sep 24 12:49:35 1991
  44  */
  45
  46 #ifndef COR_MAGIC
  47 # define COR_MAGIC "core"
  48 #endif
  49
  50 /* Need this cast because ptr is really void *.  */
  51 #define core_hdr(bfd) \
  52     (((bfd->tdata.trad_core_data))->hdr)
  53 #define core_section(bfd,n) \
  54     (((bfd)->tdata.trad_core_data)->sections[n])
  55 #define core_regsec(bfd) \
  56     (((bfd)->tdata.trad_core_data)->reg_section)
  57 #define core_reg2sec(bfd) \
  58     (((bfd)->tdata.trad_core_data)->reg2_section)
  59
  60 /* These are stored in the bfd's tdata.  */
  61 struct trad_core_struct {
  62   struct corehdr *hdr;          /* core file header */
  63   asection *reg_section;
  64   asection *reg2_section;
  65   asection *sections[MAX_CORE_SEGS];
  66 };
  67
  68 static void swap_abort PARAMS ((void));
  69
  70 static const bfd_target *
  71 aix386_core_file_p (abfd)
  72      bfd *abfd;
  73 {
  74   int i, n;
  75   unsigned char longbuf[4];     /* Raw bytes of various header fields */
  76   bfd_size_type core_size = sizeof (struct corehdr);
  77   bfd_size_type amt;
  78   struct corehdr *core;
  79   struct mergem {
  80     struct trad_core_struct coredata;
  81     struct corehdr internal_core;
  82   } *mergem;
  83
  84   amt = sizeof (longbuf);
  85   if (bfd_bread ((PTR) longbuf, amt, abfd) != amt)
  86     {
  87       if (bfd_get_error () != bfd_error_system_call)
  88         bfd_set_error (bfd_error_wrong_format);
  89       return 0;
  90     }
  91
  92   if (strncmp (longbuf, COR_MAGIC, 4))
  93     return 0;
  94
  95   if (bfd_seek (abfd, (file_ptr) 0, 0) != 0)
  96     return 0;
  97
  98   amt = sizeof (struct mergem);
  99   mergem = (struct mergem *) bfd_zalloc (abfd, amt);
 100   if (mergem == NULL)
 101     return 0;
 102
 103   core = &mergem->internal_core;
 104
 105   if ((bfd_bread ((PTR) core, core_size, abfd)) != core_size)
 106     {
 107       if (bfd_get_error () != bfd_error_system_call)
 108         bfd_set_error (bfd_error_wrong_format);
 109     loser:
 110       bfd_release (abfd, (char *) mergem);
 111       return 0;
 112     }
 113
 114   set_tdata (abfd, &mergem->coredata);
 115   core_hdr (abfd) = core;
 116
 117   /* Create the sections.  This is raunchy, but bfd_close wants to
 118      reclaim them.  */
 119   amt = sizeof (asection);
 120   core_regsec (abfd) = (asection *) bfd_zalloc (abfd, amt);
 121   if (core_regsec (abfd) == NULL)
 122     goto loser;
 123
 124   core_reg2sec (abfd) = (asection *) bfd_zalloc (abfd, amt);
 125   if (core_reg2sec (abfd) == NULL)
 126     /* bfd_release frees everything allocated after it's arg.  */
 127     goto loser;
 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) = (asection *) bfd_zalloc (abfd, amt);
 134       if (core_section (abfd, n) == NULL)
 135         goto loser;
 136
 137       switch (core->cd_segs[i].cs_type)
 138         {
 139         case COR_TYPE_DATA:
 140           core_section (abfd, n)->name = ".data";
 141           core_section (abfd, n)->flags = (SEC_ALLOC + SEC_LOAD +
 142                                            SEC_HAS_CONTENTS);
 143           break;
 144         case COR_TYPE_STACK:
 145           core_section (abfd, n)->name = ".stack";
 146           core_section (abfd, n)->flags = (SEC_ALLOC + SEC_LOAD +
 147                                            SEC_HAS_CONTENTS);
 148           break;
 149         case COR_TYPE_LIBDATA:
 150           core_section (abfd, n)->name = ".libdata";
 151           core_section (abfd, n)->flags = (SEC_ALLOC + SEC_HAS_CONTENTS);
 152           break;
 153         case COR_TYPE_WRITE:
 154           core_section (abfd, n)->name = ".writeable";
 155           core_section (abfd, n)->flags = (SEC_ALLOC + SEC_HAS_CONTENTS);
 156           break;
 157         case COR_TYPE_MSC:
 158           core_section (abfd, n)->name = ".misc";
 159           core_section (abfd, n)->flags = (SEC_ALLOC + SEC_HAS_CONTENTS);
 160           break;
 161         default:
 162           core_section (abfd, n)->name = ".unknown";
 163           core_section (abfd, n)->flags = (SEC_ALLOC + SEC_HAS_CONTENTS);
 164           break;
 165         }
 166       core_section (abfd, n)->_raw_size = core->cd_segs[i].cs_len;
 167       core_section (abfd, n)->vma       = core->cd_segs[i].cs_address;
 168       core_section (abfd, n)->filepos   = core->cd_segs[i].cs_offset;
 169       core_section (abfd, n)->alignment_power = 2;
 170       core_section (abfd, n)->next      = NULL;
 171       if (n > 0)
 172         core_section (abfd, (n - 1))->next = core_section (abfd, n);
 173
 174       abfd->section_count = ++n;
 175     }
 176
 177   core_regsec (abfd)->name = ".reg";
 178   core_reg2sec (abfd)->name = ".reg2";
 179
 180   core_regsec (abfd)->flags = SEC_HAS_CONTENTS;
 181   core_reg2sec (abfd)->flags = SEC_HAS_CONTENTS;
 182
 183   core_regsec (abfd)->_raw_size = sizeof (core->cd_regs);
 184   core_reg2sec (abfd)->_raw_size = sizeof (core->cd_fpregs);
 185
 186   core_regsec (abfd)->vma = (bfd_vma) -1;
 187   core_reg2sec (abfd)->vma = (bfd_vma) -1;
 188
 189   /* We'll access the regs afresh in the core file, like any section.  */
 190   core_regsec (abfd)->filepos =
 191     (file_ptr) offsetof (struct corehdr, cd_regs[0]);
 192   core_reg2sec (abfd)->filepos =
 193     (file_ptr) offsetof (struct corehdr, cd_fpregs);
 194
 195   /* Add the 2 reg fake sections to abfd.  */
 196   abfd->section_count += 2;
 197   abfd->sections = core_regsec (abfd);
 198   core_regsec (abfd)->next = core_reg2sec (abfd);
 199   core_reg2sec (abfd)->next = core_section (abfd, 0);
 200
 201   return abfd->xvec;
 202 }
 203
 204 static char *
 205 aix386_core_file_failing_command (abfd)
 206      bfd *abfd;
 207 {
 208   return core_hdr (abfd)->cd_comm;
 209 }
 210
 211 static int
 212 aix386_core_file_failing_signal (abfd)
 213      bfd *abfd;
 214 {
 215   return core_hdr (abfd)->cd_cursig;
 216 }
 217
 218 static boolean
 219 aix386_core_file_matches_executable_p (core_bfd, exec_bfd)
 220      bfd *core_bfd;
 221      bfd *exec_bfd;
 222 {
 223   /* FIXME: We have no way of telling at this point.  */
 224   return true;
 225 }
 226
 227 /* If somebody calls any byte-swapping routines, shoot them.  */
 228
 229 static void
 230 swap_abort ()
 231 {
 232   /* This way doesn't require any declaration for ANSI to fuck up.  */
 233   abort ();
 234 }
 235
 236 #define NO_GET  ((bfd_vma (*) PARAMS ((const bfd_byte *))) swap_abort)
 237 #define NO_GETS ((bfd_signed_vma (*) PARAMS ((const bfd_byte *))) swap_abort)
 238 #define NO_PUT  ((void (*) PARAMS ((bfd_vma, bfd_byte *))) swap_abort)
 239
 240 const bfd_target aix386_core_vec = {
 241   "aix386-core",
 242   bfd_target_unknown_flavour,
 243   BFD_ENDIAN_BIG,               /* target byte order */
 244   BFD_ENDIAN_BIG,               /* target headers byte order */
 245   (HAS_RELOC | EXEC_P |         /* object flags */
 246    HAS_LINENO | HAS_DEBUG |
 247    HAS_SYMS | HAS_LOCALS | WP_TEXT),
 248
 249   (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
 250   0,                            /* leading underscore */
 251   ' ',                          /* ar_pad_char */
 252   16,                           /* ar_max_namelen */
 253   NO_GET, NO_GETS, NO_PUT,
 254   NO_GET, NO_GETS, NO_PUT,
 255   NO_GET, NO_GETS, NO_PUT,      /* data */
 256   NO_GET, NO_GETS, NO_PUT,
 257   NO_GET, NO_GETS, NO_PUT,
 258   NO_GET, NO_GETS, NO_PUT,      /* hdrs */
 259
 260   {_bfd_dummy_target, _bfd_dummy_target,
 261    _bfd_dummy_target, aix386_core_file_p},
 262   {bfd_false, bfd_false,        /* bfd_create_object */
 263    bfd_false, bfd_false},
 264   {bfd_false, bfd_false,        /* bfd_write_contents */
 265    bfd_false, bfd_false},
 266
 267   BFD_JUMP_TABLE_GENERIC (_bfd_generic),
 268   BFD_JUMP_TABLE_COPY (_bfd_generic),
 269   BFD_JUMP_TABLE_CORE (aix386),
 270   BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive),
 271   BFD_JUMP_TABLE_SYMBOLS (_bfd_nosymbols),
 272   BFD_JUMP_TABLE_RELOCS (_bfd_norelocs),
 273   BFD_JUMP_TABLE_WRITE (_bfd_generic),
 274   BFD_JUMP_TABLE_LINK (_bfd_nolink),
 275   BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
 276
 277   NULL,
 278
 279   (PTR) 0
 280 };