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 Free Software Foundation, Inc.
   5    Written by Minh Tran-Le <TRANLE@INTELLICORP.COM>.
   6    Converted to back end form by Ian Lance Taylor <ian@cygnus.com>.
   7
   8 This file is part of BFD, the Binary File Descriptor library.
   9
  10 This program is free software; you can redistribute it and/or modify
  11 it under the terms of the GNU General Public License as published by
  12 the Free Software Foundation; either version 2 of the License, or
  13 (at your option) any later version.
  14
  15 This program is distributed in the hope that it will be useful,
  16 but WITHOUT ANY WARRANTY; without even the implied warranty of
  17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18 GNU General Public License for more details.
  19
  20 You should have received a copy of the GNU General Public License
  21 along with this program; if not, write to the Free Software
  22 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  23
  24 #include "bfd.h"
  25 #include "sysdep.h"
  26 #include "libbfd.h"
  27 #include "obstack.h"
  28 #include "coff/i386.h"
  29 #include "coff/internal.h"
  30 #include "libcoff.h"
  31
  32 #include <stdio.h>
  33 #include <stddef.h>
  34 #include <signal.h>
  35
  36 #include <errno.h>
  37
  38 #if defined (_AIX) && defined (_I386)
  39 #define NOCHECKS                /* this is for coredump.h */
  40 #define _h_USER                 /* avoid including user.h from coredump.h */
  41 #include <uinfo.h>
  42 #include <sys/i386/coredump.h>
  43 #endif /* _AIX && _I386 */
  44
  45 /* maybe this could work on some other i386 but I have not tried it
  46  * mtranle@paris - Tue Sep 24 12:49:35 1991
  47  */
  48
  49 #ifndef COR_MAGIC
  50 # define COR_MAGIC "core"
  51 #endif
  52
  53 /* need this cast because ptr is really void * */
  54 #define core_hdr(bfd) \
  55     (((bfd->tdata.trad_core_data))->hdr)
  56 #define core_section(bfd,n) \
  57     (((bfd)->tdata.trad_core_data)->sections[n])
  58 #define core_regsec(bfd) \
  59     (((bfd)->tdata.trad_core_data)->reg_section)
  60 #define core_reg2sec(bfd) \
  61     (((bfd)->tdata.trad_core_data)->reg2_section)
  62
  63 /* These are stored in the bfd's tdata */
  64 struct trad_core_struct {
  65   struct corehdr *hdr;          /* core file header */
  66   asection *reg_section;
  67   asection *reg2_section;
  68   asection *sections[MAX_CORE_SEGS];
  69 };
  70
  71 static const bfd_target *
  72 aix386_core_file_p (abfd)
  73      bfd *abfd;
  74 {
  75   int i,n;
  76   unsigned char longbuf[4];     /* Raw bytes of various header fields */
  77   int core_size = sizeof (struct corehdr);
  78   struct corehdr *core;
  79   struct mergem {
  80     struct trad_core_struct coredata;
  81     struct corehdr internal_core;
  82   } *mergem;
  83
  84   if (bfd_read ((PTR)longbuf, 1, sizeof (longbuf), abfd) != sizeof (longbuf))
  85     {
  86       if (bfd_get_error () != bfd_error_system_call)
  87         bfd_set_error (bfd_error_wrong_format);
  88       return 0;
  89     }
  90
  91   if (strncmp(longbuf,COR_MAGIC,4)) return 0;
  92
  93   if (bfd_seek (abfd, 0L, false) < 0) 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 reclaim
 113      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 = (file_ptr)offsetof(struct corehdr,cd_regs[0]);
 201   core_reg2sec (abfd)->filepos = (file_ptr)offsetof(struct corehdr,
 202                                                     cd_fpregs);
 203
 204   /* add the 2 reg fake sections to abfd */
 205   abfd->section_count += 2;
 206   abfd->sections = core_regsec (abfd);
 207   core_regsec (abfd)->next = core_reg2sec (abfd);
 208   core_reg2sec (abfd)->next = core_section (abfd, 0);
 209
 210   return abfd->xvec;
 211 }
 212
 213 static char *
 214 aix386_core_file_failing_command (abfd)
 215      bfd *abfd;
 216 {
 217   return core_hdr (abfd)->cd_comm;
 218 }
 219
 220 static int
 221 aix386_core_file_failing_signal (abfd)
 222      bfd *abfd;
 223 {
 224   return core_hdr (abfd)->cd_cursig;
 225 }
 226
 227 static boolean
 228 aix386_core_file_matches_executable_p (core_bfd, exec_bfd)
 229      bfd *core_bfd;
 230      bfd *exec_bfd;
 231 {
 232   return true;                  /* FIXME, We have no way of telling at this
 233                                    point */
 234 }
 235
 236 /* If somebody calls any byte-swapping routines, shoot them.  */
 237 void
 238 swap_abort()
 239 {
 240   abort(); /* This way doesn't require any declaration for ANSI to fuck up */
 241 }
 242 #define NO_GET  ((PROTO(bfd_vma, (*), (       const bfd_byte *))) swap_abort )
 243 #define NO_GETS ((PROTO(bfd_signed_vma, (*), (const bfd_byte *))) swap_abort )
 244 #define NO_PUT  ((PROTO(void,        (*), (bfd_vma, bfd_byte *))) swap_abort )
 245
 246 const bfd_target aix386_core_vec =
 247   {
 248     "aix386-core",
 249     bfd_target_unknown_flavour,
 250     true,                       /* target byte order */
 251     true,                       /* target headers byte order */
 252   (HAS_RELOC | EXEC_P |         /* object flags */
 253    HAS_LINENO | HAS_DEBUG |
 254    HAS_SYMS | HAS_LOCALS | WP_TEXT),
 255
 256   (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
 257     0,                                          /* leading underscore */
 258     ' ',                                        /* ar_pad_char */
 259     16,                                         /* ar_max_namelen */
 260     NO_GET, NO_GETS, NO_PUT,
 261     NO_GET, NO_GETS, NO_PUT,
 262     NO_GET, NO_GETS, NO_PUT, /* data */
 263     NO_GET, NO_GETS, NO_PUT,
 264     NO_GET, NO_GETS, NO_PUT,
 265     NO_GET, NO_GETS, NO_PUT, /* hdrs */
 266
 267     {_bfd_dummy_target, _bfd_dummy_target,
 268      _bfd_dummy_target, aix386_core_file_p},
 269     {bfd_false, bfd_false,      /* bfd_create_object */
 270      bfd_false, bfd_false},
 271     {bfd_false, bfd_false,      /* bfd_write_contents */
 272      bfd_false, bfd_false},
 273
 274      BFD_JUMP_TABLE_GENERIC (_bfd_generic),
 275      BFD_JUMP_TABLE_COPY (_bfd_generic),
 276      BFD_JUMP_TABLE_CORE (aix386),
 277      BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive),
 278      BFD_JUMP_TABLE_SYMBOLS (_bfd_nosymbols),
 279      BFD_JUMP_TABLE_RELOCS (_bfd_norelocs),
 280      BFD_JUMP_TABLE_WRITE (_bfd_generic),
 281      BFD_JUMP_TABLE_LINK (_bfd_nolink),
 282      BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
 283
 284     (PTR) 0
 285 };