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 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., 675 Mass Ave, Cambridge, MA 02139, USA.  */
  23
  24 /* To use this file on a particular host, configure the host with these
  25    parameters in the config/h-HOST file:
  26
  27         HDEFINES=-DAIX386_CORE=1
  28         HDEPFILES=aix386-core.o
  29  */
  30
  31 #include "bfd.h"
  32 #include "sysdep.h"
  33 #include "libbfd.h"
  34 #include "obstack.h"
  35 #include "coff/i386.h"
  36 #include "coff/internal.h"
  37 #include "libcoff.h"
  38
  39 #include <stdio.h>
  40 #include <stddef.h>
  41 #include <signal.h>
  42
  43 #include <errno.h>
  44
  45 #if defined (_AIX) && defined (_I386)
  46 #define NOCHECKS                /* this is for coredump.h */
  47 #define _h_USER                 /* avoid including user.h from coredump.h */
  48 #include <uinfo.h>
  49 #include <sys/i386/coredump.h>
  50 #endif /* _AIX && _I386 */
  51
  52 /* maybe this could work on some other i386 but I have not tried it
  53  * mtranle@paris - Tue Sep 24 12:49:35 1991
  54  */
  55
  56 #ifndef COR_MAGIC
  57 # define COR_MAGIC "core"
  58 #endif
  59
  60 /* need this cast because ptr is really void * */
  61 #define core_hdr(bfd) \
  62     (((bfd->tdata.trad_core_data))->hdr)
  63 #define core_section(bfd,n) \
  64     (((bfd)->tdata.trad_core_data)->sections[n])
  65 #define core_regsec(bfd) \
  66     (((bfd)->tdata.trad_core_data)->reg_section)
  67 #define core_reg2sec(bfd) \
  68     (((bfd)->tdata.trad_core_data)->reg2_section)
  69
  70 /* These are stored in the bfd's tdata */
  71 struct trad_core_struct {
  72   struct corehdr *hdr;          /* core file header */
  73   asection *reg_section;
  74   asection *reg2_section;
  75   asection *sections[MAX_CORE_SEGS];
  76 };
  77
  78 static bfd_target *
  79 aix386_core_file_p (abfd)
  80      bfd *abfd;
  81 {
  82   int i,n;
  83   unsigned char longbuf[4];     /* Raw bytes of various header fields */
  84   int core_size = sizeof (struct corehdr);
  85   struct corehdr *core;
  86   struct mergem {
  87     struct trad_core_struct coredata;
  88     struct corehdr internal_core;
  89   } *mergem;
  90
  91   if (bfd_read ((PTR)longbuf, 1, sizeof (longbuf), abfd) != sizeof (longbuf))
  92     {
  93       if (bfd_get_error () != bfd_error_system_call)
  94         bfd_set_error (bfd_error_wrong_format);
  95       return 0;
  96     }
  97
  98   if (strncmp(longbuf,COR_MAGIC,4)) return 0;
  99
 100   if (bfd_seek (abfd, 0L, false) < 0) return 0;
 101
 102   mergem = (struct mergem *)bfd_zalloc (abfd, sizeof (struct mergem));
 103   if (mergem == NULL)
 104     {
 105       bfd_set_error (bfd_error_no_memory);
 106       return 0;
 107     }
 108
 109   core = &mergem->internal_core;
 110
 111   if ((bfd_read ((PTR) core, 1, core_size, abfd)) != core_size)
 112     {
 113       if (bfd_get_error () != bfd_error_system_call)
 114         bfd_set_error (bfd_error_wrong_format);
 115       bfd_release (abfd, (char *)mergem);
 116       return 0;
 117     }
 118
 119   set_tdata (abfd, &mergem->coredata);
 120   core_hdr (abfd) = core;
 121
 122   /* create the sections.  This is raunchy, but bfd_close wants to reclaim
 123      them */
 124   core_regsec (abfd) = (asection *) bfd_zalloc (abfd, sizeof (asection));
 125   if (core_regsec (abfd) == NULL)
 126     {
 127     loser:
 128       bfd_set_error (bfd_error_no_memory);
 129       bfd_release (abfd, (char *)mergem);
 130       return 0;
 131     }
 132   core_reg2sec (abfd) = (asection *) bfd_zalloc (abfd, sizeof (asection));
 133   if (core_reg2sec (abfd) == NULL)
 134     {
 135     loser1:
 136      bfd_release (abfd, core_regsec (abfd));
 137       goto loser;
 138     }
 139
 140   for (i=0, n=0 ; (i < MAX_CORE_SEGS) && (core->cd_segs[i].cs_type) ; i++)
 141     {
 142       if (core->cd_segs[i].cs_offset == 0)
 143         continue;
 144       core_section (abfd,n) =
 145         (asection *) bfd_zalloc (abfd, sizeof (asection));
 146       if (core_section (abfd,n) == NULL)
 147         {
 148           int j;
 149           if (n > 0)
 150             {
 151               for (j=0; j < n; j++)
 152                 bfd_release (abfd, core_section(abfd, j));
 153             }
 154           bfd_release (abfd, (char *)mergem);
 155           goto loser1;
 156         }
 157
 158       switch (core->cd_segs[i].cs_type)
 159         {
 160         case COR_TYPE_DATA:
 161           core_section (abfd, n)->name = ".data";
 162           core_section (abfd, n)->flags = (SEC_ALLOC + SEC_LOAD +
 163                                            SEC_HAS_CONTENTS);
 164           break;
 165         case COR_TYPE_STACK:
 166           core_section (abfd, n)->name = ".stack";
 167           core_section (abfd, n)->flags = (SEC_ALLOC + SEC_LOAD +
 168                                            SEC_HAS_CONTENTS);
 169           break;
 170         case COR_TYPE_LIBDATA:
 171           core_section (abfd, n)->name = ".libdata";
 172           core_section (abfd, n)->flags = (SEC_ALLOC + SEC_HAS_CONTENTS);
 173           break;
 174         case COR_TYPE_WRITE:
 175           core_section (abfd, n)->name = ".writeable";
 176           core_section (abfd, n)->flags = (SEC_ALLOC + SEC_HAS_CONTENTS);
 177           break;
 178         case COR_TYPE_MSC:
 179           core_section (abfd, n)->name = ".misc";
 180           core_section (abfd, n)->flags = (SEC_ALLOC + SEC_HAS_CONTENTS);
 181           break;
 182         default:
 183           core_section (abfd, n)->name = ".unknown";
 184           core_section (abfd, n)->flags = (SEC_ALLOC + SEC_HAS_CONTENTS);
 185           break;
 186         }
 187       core_section (abfd, n)->_raw_size = core->cd_segs[i].cs_len;
 188       core_section (abfd, n)->vma       = core->cd_segs[i].cs_address;
 189       core_section (abfd, n)->filepos   = core->cd_segs[i].cs_offset;
 190       core_section (abfd, n)->alignment_power = 2;
 191       core_section (abfd, n)->next      = NULL;
 192       if (n > 0)
 193         core_section (abfd, (n-1))->next = core_section (abfd, n);
 194
 195       abfd->section_count = ++n;
 196     }
 197
 198   core_regsec (abfd)->name = ".reg";
 199   core_reg2sec (abfd)->name = ".reg2";
 200
 201   core_regsec (abfd)->flags = SEC_ALLOC + SEC_HAS_CONTENTS;
 202   core_reg2sec (abfd)->flags = SEC_ALLOC + SEC_HAS_CONTENTS;
 203
 204   core_regsec (abfd)->_raw_size = sizeof(core->cd_regs);
 205   core_reg2sec (abfd)->_raw_size = sizeof(core->cd_fpregs);
 206
 207   core_regsec (abfd)->vma = -1;
 208   core_reg2sec (abfd)->vma = -1;
 209
 210   /* We'll access the regs afresh in the core file, like any section: */
 211   core_regsec (abfd)->filepos = (file_ptr)offsetof(struct corehdr,cd_regs[0]);
 212   core_reg2sec (abfd)->filepos = (file_ptr)offsetof(struct corehdr,
 213                                                     cd_fpregs);
 214
 215   /* add the 2 reg fake sections to abfd */
 216   abfd->section_count += 2;
 217   abfd->sections = core_regsec (abfd);
 218   core_regsec (abfd)->next = core_reg2sec (abfd);
 219   core_reg2sec (abfd)->next = core_section (abfd, 0);
 220
 221   return abfd->xvec;
 222 }
 223
 224 static char *
 225 aix386_core_file_failing_command (abfd)
 226      bfd *abfd;
 227 {
 228   return core_hdr (abfd)->cd_comm;
 229 }
 230
 231 static int
 232 aix386_core_file_failing_signal (abfd)
 233      bfd *abfd;
 234 {
 235   return core_hdr (abfd)->cd_cursig;
 236 }
 237
 238 static boolean
 239 aix386_core_file_matches_executable_p (core_bfd, exec_bfd)
 240      bfd *core_bfd;
 241      bfd *exec_bfd;
 242 {
 243   return true;                  /* FIXME, We have no way of telling at this
 244                                    point */
 245 }
 246
 247 /* If somebody calls any byte-swapping routines, shoot them.  */
 248 void
 249 swap_abort()
 250 {
 251   abort(); /* This way doesn't require any declaration for ANSI to fuck up */
 252 }
 253 #define NO_GET  ((PROTO(bfd_vma, (*), (       const bfd_byte *))) swap_abort )
 254 #define NO_GETS ((PROTO(bfd_signed_vma, (*), (const bfd_byte *))) swap_abort )
 255 #define NO_PUT  ((PROTO(void,        (*), (bfd_vma, bfd_byte *))) swap_abort )
 256
 257 bfd_target aix386_core_vec =
 258   {
 259     "aix386-core",
 260     bfd_target_unknown_flavour,
 261     true,                       /* target byte order */
 262     true,                       /* target headers byte order */
 263   (HAS_RELOC | EXEC_P |         /* object flags */
 264    HAS_LINENO | HAS_DEBUG |
 265    HAS_SYMS | HAS_LOCALS | WP_TEXT),
 266
 267   (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
 268     0,                                          /* leading underscore */
 269     ' ',                                        /* ar_pad_char */
 270     16,                                         /* ar_max_namelen */
 271     3,                                          /* minimum alignment power */
 272     NO_GET, NO_GETS, NO_PUT,
 273     NO_GET, NO_GETS, NO_PUT,
 274     NO_GET, NO_GETS, NO_PUT, /* data */
 275     NO_GET, NO_GETS, NO_PUT,
 276     NO_GET, NO_GETS, NO_PUT,
 277     NO_GET, NO_GETS, NO_PUT, /* hdrs */
 278
 279     {_bfd_dummy_target, _bfd_dummy_target,
 280      _bfd_dummy_target, aix386_core_file_p},
 281     {bfd_false, bfd_false,      /* bfd_create_object */
 282      bfd_false, bfd_false},
 283     {bfd_false, bfd_false,      /* bfd_write_contents */
 284      bfd_false, bfd_false},
 285
 286      BFD_JUMP_TABLE_GENERIC (_bfd_generic),
 287      BFD_JUMP_TABLE_COPY (_bfd_generic),
 288      BFD_JUMP_TABLE_CORE (aix386),
 289      BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive),
 290      BFD_JUMP_TABLE_SYMBOLS (_bfd_nosymbols),
 291      BFD_JUMP_TABLE_RELOCS (_bfd_norelocs),
 292      BFD_JUMP_TABLE_WRITE (_bfd_generic),
 293      BFD_JUMP_TABLE_LINK (_bfd_nolink),
 294
 295     (PTR) 0
 296 };