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 (C) 1988-2018 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 3 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., 51 Franklin Street - Fifth Floor, Boston,
  23    MA 02110-1301, USA.  */
  24
  25 #include "sysdep.h"
  26 #include "bfd.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 {
  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 const bfd_target *
  69 aix386_core_file_p (bfd *abfd)
  70 {
  71   int i, n;
  72   unsigned char longbuf[4];     /* Raw bytes of various header fields */
  73   bfd_size_type core_size = sizeof (struct corehdr);
  74   bfd_size_type amt;
  75   struct corehdr *core;
  76   struct mergem
  77   {
  78     struct trad_core_struct coredata;
  79     struct corehdr internal_core;
  80   } *mergem;
  81   flagword flags;
  82
  83   amt = sizeof (longbuf);
  84   if (bfd_bread (longbuf, amt, abfd) != amt)
  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))
  92     return 0;
  93
  94   if (bfd_seek (abfd, (file_ptr) 0, 0) != 0)
  95     return 0;
  96
  97   amt = sizeof (struct mergem);
  98   mergem = (struct mergem *) bfd_zalloc (abfd, amt);
  99   if (mergem == NULL)
 100     return 0;
 101
 102   core = &mergem->internal_core;
 103
 104   if ((bfd_bread (core, core_size, abfd)) != core_size)
 105     {
 106       if (bfd_get_error () != bfd_error_system_call)
 107         bfd_set_error (bfd_error_wrong_format);
 108     loser:
 109       bfd_release (abfd, (char *) mergem);
 110       abfd->tdata.any = NULL;
 111       bfd_section_list_clear (abfd);
 112       return 0;
 113     }
 114
 115   set_tdata (abfd, &mergem->coredata);
 116   core_hdr (abfd) = core;
 117
 118   /* Create the sections.  */
 119   flags = SEC_HAS_CONTENTS;
 120   core_regsec (abfd) = bfd_make_section_anyway_with_flags (abfd, ".reg",
 121                                                            flags);
 122   if (core_regsec (abfd) == NULL)
 123     goto loser;
 124
 125   core_regsec (abfd)->size = sizeof (core->cd_regs);
 126   core_regsec (abfd)->vma = (bfd_vma) -1;
 127
 128   /* We'll access the regs afresh in the core file, like any section.  */
 129   core_regsec (abfd)->filepos =
 130     (file_ptr) offsetof (struct corehdr, cd_regs[0]);
 131
 132   flags = SEC_HAS_CONTENTS;
 133   core_reg2sec (abfd) = bfd_make_section_anyway_with_flags (abfd, ".reg2",
 134                                                             flags);
 135   if (core_reg2sec (abfd) == NULL)
 136     /* bfd_release frees everything allocated after it's arg.  */
 137     goto loser;
 138
 139   core_reg2sec (abfd)->size = sizeof (core->cd_fpregs);
 140   core_reg2sec (abfd)->vma = (bfd_vma) -1;
 141   core_reg2sec (abfd)->filepos =
 142     (file_ptr) offsetof (struct corehdr, cd_fpregs);
 143
 144   for (i = 0, n = 0; (i < MAX_CORE_SEGS) && (core->cd_segs[i].cs_type); i++)
 145     {
 146       const char *sname;
 147       flagword flags;
 148
 149       if (core->cd_segs[i].cs_offset == 0)
 150         continue;
 151
 152       switch (core->cd_segs[i].cs_type)
 153         {
 154         case COR_TYPE_DATA:
 155           sname = ".data";
 156           flags = SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS;
 157           break;
 158         case COR_TYPE_STACK:
 159           sname = ".stack";
 160           flags = SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS;
 161           break;
 162         case COR_TYPE_LIBDATA:
 163           sname = ".libdata";
 164           flags = SEC_ALLOC + SEC_HAS_CONTENTS;
 165           break;
 166         case COR_TYPE_WRITE:
 167           sname = ".writeable";
 168           flags = SEC_ALLOC + SEC_HAS_CONTENTS;
 169           break;
 170         case COR_TYPE_MSC:
 171           sname = ".misc";
 172           flags = SEC_ALLOC + SEC_HAS_CONTENTS;
 173           break;
 174         default:
 175           sname = ".unknown";
 176           flags = SEC_ALLOC + SEC_HAS_CONTENTS;
 177           break;
 178         }
 179       core_section (abfd, n) = bfd_make_section_anyway_with_flags (abfd,
 180                                                                    sname,
 181                                                                    flags);
 182       if (core_section (abfd, n) == NULL)
 183         goto loser;
 184
 185       core_section (abfd, n)->size = core->cd_segs[i].cs_len;
 186       core_section (abfd, n)->vma       = core->cd_segs[i].cs_address;
 187       core_section (abfd, n)->filepos   = core->cd_segs[i].cs_offset;
 188       core_section (abfd, n)->alignment_power = 2;
 189       n++;
 190     }
 191
 192   return abfd->xvec;
 193 }
 194
 195 static char *
 196 aix386_core_file_failing_command (bfd *abfd)
 197 {
 198   return core_hdr (abfd)->cd_comm;
 199 }
 200
 201 static int
 202 aix386_core_file_failing_signal (bfd *abfd)
 203 {
 204   return core_hdr (abfd)->cd_cursig;
 205 }
 206
 207 #define aix386_core_file_matches_executable_p generic_core_file_matches_executable_p
 208
 209 #define aix386_core_file_pid _bfd_nocore_core_file_pid
 210
 211 /* If somebody calls any byte-swapping routines, shoot them.  */
 212
 213 static void
 214 swap_abort (void)
 215 {
 216   /* This way doesn't require any declaration for ANSI to fuck up.  */
 217   abort ();
 218 }
 219
 220 #define NO_GET ((bfd_vma (*) (const void *)) swap_abort)
 221 #define NO_PUT ((void (*) (bfd_vma, void *)) swap_abort)
 222 #define NO_GETS ((bfd_signed_vma (*) (const void *)) swap_abort)
 223 #define NO_GET64 ((bfd_uint64_t (*) (const void *)) swap_abort)
 224 #define NO_PUT64 ((void (*) (bfd_uint64_t, void *)) swap_abort)
 225 #define NO_GETS64 ((bfd_int64_t (*) (const void *)) swap_abort)
 226
 227 const bfd_target core_aix386_vec =
 228 {
 229   "aix386-core",
 230   bfd_target_unknown_flavour,
 231   BFD_ENDIAN_BIG,               /* target byte order */
 232   BFD_ENDIAN_BIG,               /* target headers byte order */
 233   (HAS_RELOC | EXEC_P |         /* object flags */
 234    HAS_LINENO | HAS_DEBUG |
 235    HAS_SYMS | HAS_LOCALS | WP_TEXT),
 236
 237   (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
 238   0,                            /* leading underscore */
 239   ' ',                          /* ar_pad_char */
 240   16,                           /* ar_max_namelen */
 241   0,                            /* match priority.  */
 242   NO_GET64, NO_GETS64, NO_PUT64,
 243   NO_GET, NO_GETS, NO_PUT,
 244   NO_GET, NO_GETS, NO_PUT,      /* data */
 245   NO_GET64, NO_GETS64, NO_PUT64,
 246   NO_GET, NO_GETS, NO_PUT,
 247   NO_GET, NO_GETS, NO_PUT,      /* hdrs */
 248
 249   {                             /* bfd_check_format */
 250     _bfd_dummy_target,
 251     _bfd_dummy_target,
 252     _bfd_dummy_target,
 253     aix386_core_file_p
 254   },
 255   {                             /* bfd_create_object */
 256     _bfd_bool_bfd_false_error,
 257     _bfd_bool_bfd_false_error,
 258     _bfd_bool_bfd_false_error,
 259     _bfd_bool_bfd_false_error
 260   },
 261   {                             /* bfd_write_contents */
 262     _bfd_bool_bfd_false_error,
 263     _bfd_bool_bfd_false_error,
 264     _bfd_bool_bfd_false_error,
 265     _bfd_bool_bfd_false_error
 266   },
 267
 268   BFD_JUMP_TABLE_GENERIC (_bfd_generic),
 269   BFD_JUMP_TABLE_COPY (_bfd_generic),
 270   BFD_JUMP_TABLE_CORE (aix386),
 271   BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive),
 272   BFD_JUMP_TABLE_SYMBOLS (_bfd_nosymbols),
 273   BFD_JUMP_TABLE_RELOCS (_bfd_norelocs),
 274   BFD_JUMP_TABLE_WRITE (_bfd_generic),
 275   BFD_JUMP_TABLE_LINK (_bfd_nolink),
 276   BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
 277
 278   NULL,
 279
 280   NULL
 281 };