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, 89, 91, 92, 93, 94, 95, 96, 97, 1998
   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)) return 0;
  90
  91   if (bfd_seek (abfd, 0L, false) < 0) return 0;
  92
  93   mergem = (struct mergem *)bfd_zalloc (abfd, sizeof (struct mergem));
  94   if (mergem == NULL)
  95     return 0;
  96
  97   core = &mergem->internal_core;
  98
  99   if ((bfd_read ((PTR) core, 1, core_size, abfd)) != core_size)
 100     {
 101       if (bfd_get_error () != bfd_error_system_call)
 102         bfd_set_error (bfd_error_wrong_format);
 103       bfd_release (abfd, (char *)mergem);
 104       return 0;
 105     }
 106
 107   set_tdata (abfd, &mergem->coredata);
 108   core_hdr (abfd) = core;
 109
 110   /* create the sections.  This is raunchy, but bfd_close wants to reclaim
 111      them */
 112   core_regsec (abfd) = (asection *) bfd_zalloc (abfd, sizeof (asection));
 113   if (core_regsec (abfd) == NULL)
 114     {
 115     loser:
 116       bfd_release (abfd, (char *)mergem);
 117       return 0;
 118     }
 119   core_reg2sec (abfd) = (asection *) bfd_zalloc (abfd, sizeof (asection));
 120   if (core_reg2sec (abfd) == NULL)
 121     {
 122     loser1:
 123      bfd_release (abfd, core_regsec (abfd));
 124       goto loser;
 125     }
 126
 127   for (i=0, n=0 ; (i < MAX_CORE_SEGS) && (core->cd_segs[i].cs_type) ; i++)
 128     {
 129       if (core->cd_segs[i].cs_offset == 0)
 130         continue;
 131       core_section (abfd,n) =
 132         (asection *) bfd_zalloc (abfd, sizeof (asection));
 133       if (core_section (abfd,n) == NULL)
 134         {
 135           int j;
 136           if (n > 0)
 137             {
 138               for (j=0; j < n; j++)
 139                 bfd_release (abfd, core_section(abfd, j));
 140             }
 141           bfd_release (abfd, (char *)mergem);
 142           goto loser1;
 143         }
 144
 145       switch (core->cd_segs[i].cs_type)
 146         {
 147         case COR_TYPE_DATA:
 148           core_section (abfd, n)->name = ".data";
 149           core_section (abfd, n)->flags = (SEC_ALLOC + SEC_LOAD +
 150                                            SEC_HAS_CONTENTS);
 151           break;
 152         case COR_TYPE_STACK:
 153           core_section (abfd, n)->name = ".stack";
 154           core_section (abfd, n)->flags = (SEC_ALLOC + SEC_LOAD +
 155                                            SEC_HAS_CONTENTS);
 156           break;
 157         case COR_TYPE_LIBDATA:
 158           core_section (abfd, n)->name = ".libdata";
 159           core_section (abfd, n)->flags = (SEC_ALLOC + SEC_HAS_CONTENTS);
 160           break;
 161         case COR_TYPE_WRITE:
 162           core_section (abfd, n)->name = ".writeable";
 163           core_section (abfd, n)->flags = (SEC_ALLOC + SEC_HAS_CONTENTS);
 164           break;
 165         case COR_TYPE_MSC:
 166           core_section (abfd, n)->name = ".misc";
 167           core_section (abfd, n)->flags = (SEC_ALLOC + SEC_HAS_CONTENTS);
 168           break;
 169         default:
 170           core_section (abfd, n)->name = ".unknown";
 171           core_section (abfd, n)->flags = (SEC_ALLOC + SEC_HAS_CONTENTS);
 172           break;
 173         }
 174       core_section (abfd, n)->_raw_size = core->cd_segs[i].cs_len;
 175       core_section (abfd, n)->vma       = core->cd_segs[i].cs_address;
 176       core_section (abfd, n)->filepos   = core->cd_segs[i].cs_offset;
 177       core_section (abfd, n)->alignment_power = 2;
 178       core_section (abfd, n)->next      = NULL;
 179       if (n > 0)
 180         core_section (abfd, (n-1))->next = core_section (abfd, n);
 181
 182       abfd->section_count = ++n;
 183     }
 184
 185   core_regsec (abfd)->name = ".reg";
 186   core_reg2sec (abfd)->name = ".reg2";
 187
 188   core_regsec (abfd)->flags = SEC_HAS_CONTENTS;
 189   core_reg2sec (abfd)->flags = SEC_HAS_CONTENTS;
 190
 191   core_regsec (abfd)->_raw_size = sizeof(core->cd_regs);
 192   core_reg2sec (abfd)->_raw_size = sizeof(core->cd_fpregs);
 193
 194   core_regsec (abfd)->vma = -1;
 195   core_reg2sec (abfd)->vma = -1;
 196
 197   /* We'll access the regs afresh in the core file, like any section: */
 198   core_regsec (abfd)->filepos = (file_ptr)offsetof(struct corehdr,cd_regs[0]);
 199   core_reg2sec (abfd)->filepos = (file_ptr)offsetof(struct corehdr,
 200                                                     cd_fpregs);
 201
 202   /* add the 2 reg fake sections to abfd */
 203   abfd->section_count += 2;
 204   abfd->sections = core_regsec (abfd);
 205   core_regsec (abfd)->next = core_reg2sec (abfd);
 206   core_reg2sec (abfd)->next = core_section (abfd, 0);
 207
 208   return abfd->xvec;
 209 }
 210
 211 static char *
 212 aix386_core_file_failing_command (abfd)
 213      bfd *abfd;
 214 {
 215   return core_hdr (abfd)->cd_comm;
 216 }
 217
 218 static int
 219 aix386_core_file_failing_signal (abfd)
 220      bfd *abfd;
 221 {
 222   return core_hdr (abfd)->cd_cursig;
 223 }
 224
 225 static boolean
 226 aix386_core_file_matches_executable_p (core_bfd, exec_bfd)
 227      bfd *core_bfd;
 228      bfd *exec_bfd;
 229 {
 230   return true;                  /* FIXME, We have no way of telling at this
 231                                    point */
 232 }
 233
 234 /* If somebody calls any byte-swapping routines, shoot them.  */
 235 static void
 236 swap_abort()
 237 {
 238   abort(); /* This way doesn't require any declaration for ANSI to fuck up */
 239 }
 240 #define NO_GET  ((PROTO(bfd_vma, (*), (       const bfd_byte *))) swap_abort )
 241 #define NO_GETS ((PROTO(bfd_signed_vma, (*), (const bfd_byte *))) swap_abort )
 242 #define NO_PUT  ((PROTO(void,        (*), (bfd_vma, bfd_byte *))) swap_abort )
 243
 244 const bfd_target aix386_core_vec =
 245   {
 246     "aix386-core",
 247     bfd_target_unknown_flavour,
 248     BFD_ENDIAN_BIG,             /* target byte order */
 249     BFD_ENDIANG_BIG,            /* target headers byte order */
 250   (HAS_RELOC | EXEC_P |         /* object flags */
 251    HAS_LINENO | HAS_DEBUG |
 252    HAS_SYMS | HAS_LOCALS | WP_TEXT),
 253
 254   (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
 255     0,                                          /* leading underscore */
 256     ' ',                                        /* ar_pad_char */
 257     16,                                         /* ar_max_namelen */
 258     NO_GET, NO_GETS, NO_PUT,
 259     NO_GET, NO_GETS, NO_PUT,
 260     NO_GET, NO_GETS, NO_PUT, /* data */
 261     NO_GET, NO_GETS, NO_PUT,
 262     NO_GET, NO_GETS, NO_PUT,
 263     NO_GET, NO_GETS, NO_PUT, /* hdrs */
 264
 265     {_bfd_dummy_target, _bfd_dummy_target,
 266      _bfd_dummy_target, aix386_core_file_p},
 267     {bfd_false, bfd_false,      /* bfd_create_object */
 268      bfd_false, bfd_false},
 269     {bfd_false, bfd_false,      /* bfd_write_contents */
 270      bfd_false, bfd_false},
 271
 272      BFD_JUMP_TABLE_GENERIC (_bfd_generic),
 273      BFD_JUMP_TABLE_COPY (_bfd_generic),
 274      BFD_JUMP_TABLE_CORE (aix386),
 275      BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive),
 276      BFD_JUMP_TABLE_SYMBOLS (_bfd_nosymbols),
 277      BFD_JUMP_TABLE_RELOCS (_bfd_norelocs),
 278      BFD_JUMP_TABLE_WRITE (_bfd_generic),
 279      BFD_JUMP_TABLE_LINK (_bfd_nolink),
 280      BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
 281
 282     NULL,
 283
 284     (PTR) 0
 285 };