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 DEFUN(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   bfd_error = system_call_error;
  92
  93   if (bfd_read ((PTR)longbuf, 1, sizeof (longbuf), abfd) != sizeof (longbuf))
  94     return 0;
  95
  96   if (strncmp(longbuf,COR_MAGIC,4)) return 0;
  97
  98   if (bfd_seek (abfd, 0L, false) < 0) return 0;
  99
 100   mergem = (struct mergem *)bfd_zalloc (abfd, sizeof (struct mergem));
 101   if (mergem == NULL)
 102     {
 103       bfd_error = no_memory;
 104       return 0;
 105     }
 106
 107   core = &mergem->internal_core;
 108
 109   if ((bfd_read ((PTR) core, 1, core_size, abfd)) != core_size)
 110     {
 111       bfd_error = system_call_error;
 112       bfd_release (abfd, (char *)mergem);
 113       return 0;
 114     }
 115
 116   set_tdata (abfd, &mergem->coredata);
 117   core_hdr (abfd) = core;
 118
 119   /* create the sections.  This is raunchy, but bfd_close wants to reclaim
 120      them */
 121   core_regsec (abfd) = (asection *) bfd_zalloc (abfd, sizeof (asection));
 122   if (core_regsec (abfd) == NULL)
 123     {
 124     loser:
 125       bfd_error = no_memory;
 126       bfd_release (abfd, (char *)mergem);
 127       return 0;
 128     }
 129   core_reg2sec (abfd) = (asection *) bfd_zalloc (abfd, sizeof (asection));
 130   if (core_reg2sec (abfd) == NULL)
 131     {
 132     loser1:
 133      bfd_release (abfd, core_regsec (abfd));
 134       goto loser;
 135     }
 136
 137   for (i=0, n=0 ; (i < MAX_CORE_SEGS) && (core->cd_segs[i].cs_type) ; i++)
 138     {
 139       if (core->cd_segs[i].cs_offset == 0)
 140         continue;
 141       core_section (abfd,n) =
 142         (asection *) bfd_zalloc (abfd, sizeof (asection));
 143       if (core_section (abfd,n) == NULL)
 144         {
 145           int j;
 146           if (n > 0)
 147             {
 148               for (j=0; j < n; j++)
 149                 bfd_release (abfd, core_section(abfd, j));
 150             }
 151           bfd_release (abfd, (char *)mergem);
 152           goto loser1;
 153         }
 154
 155       switch (core->cd_segs[i].cs_type)
 156         {
 157         case COR_TYPE_DATA:
 158           core_section (abfd, n)->name = ".data";
 159           core_section (abfd, n)->flags = (SEC_ALLOC + SEC_LOAD +
 160                                            SEC_HAS_CONTENTS);
 161           break;
 162         case COR_TYPE_STACK:
 163           core_section (abfd, n)->name = ".stack";
 164           core_section (abfd, n)->flags = (SEC_ALLOC + SEC_LOAD +
 165                                            SEC_HAS_CONTENTS);
 166           break;
 167         case COR_TYPE_LIBDATA:
 168           core_section (abfd, n)->name = ".libdata";
 169           core_section (abfd, n)->flags = (SEC_ALLOC + SEC_HAS_CONTENTS);
 170           break;
 171         case COR_TYPE_WRITE:
 172           core_section (abfd, n)->name = ".writeable";
 173           core_section (abfd, n)->flags = (SEC_ALLOC + SEC_HAS_CONTENTS);
 174           break;
 175         case COR_TYPE_MSC:
 176           core_section (abfd, n)->name = ".misc";
 177           core_section (abfd, n)->flags = (SEC_ALLOC + SEC_HAS_CONTENTS);
 178           break;
 179         default:
 180           core_section (abfd, n)->name = ".unknown";
 181           core_section (abfd, n)->flags = (SEC_ALLOC + SEC_HAS_CONTENTS);
 182           break;
 183         }
 184       core_section (abfd, n)->_raw_size = core->cd_segs[i].cs_len;
 185       core_section (abfd, n)->vma       = core->cd_segs[i].cs_address;
 186       core_section (abfd, n)->filepos   = core->cd_segs[i].cs_offset;
 187       core_section (abfd, n)->alignment_power = 2;
 188       core_section (abfd, n)->next      = NULL;
 189       if (n > 0)
 190         core_section (abfd, (n-1))->next = core_section (abfd, n);
 191
 192       abfd->section_count = ++n;
 193     }
 194
 195   core_regsec (abfd)->name = ".reg";
 196   core_reg2sec (abfd)->name = ".reg2";
 197
 198   core_regsec (abfd)->flags = SEC_ALLOC + SEC_HAS_CONTENTS;
 199   core_reg2sec (abfd)->flags = SEC_ALLOC + SEC_HAS_CONTENTS;
 200
 201   core_regsec (abfd)->_raw_size = sizeof(core->cd_regs);
 202   core_reg2sec (abfd)->_raw_size = sizeof(core->cd_fpregs);
 203
 204   core_regsec (abfd)->vma = -1;
 205   core_reg2sec (abfd)->vma = -1;
 206
 207   /* We'll access the regs afresh in the core file, like any section: */
 208   core_regsec (abfd)->filepos = (file_ptr)offsetof(struct corehdr,cd_regs[0]);
 209   core_reg2sec (abfd)->filepos = (file_ptr)offsetof(struct corehdr,
 210                                                     cd_fpregs);
 211
 212   /* add the 2 reg fake sections to abfd */
 213   abfd->section_count += 2;
 214   abfd->sections = core_regsec (abfd);
 215   core_regsec (abfd)->next = core_reg2sec (abfd);
 216   core_reg2sec (abfd)->next = core_section (abfd, 0);
 217
 218   return abfd->xvec;
 219 }
 220
 221 static char *
 222 DEFUN(aix386_core_file_failing_command,(abfd),
 223       bfd *abfd)
 224 {
 225   return core_hdr (abfd)->cd_comm;
 226 }
 227
 228 static int
 229 DEFUN(aix386_core_file_failing_signal,(abfd),
 230       bfd *abfd)
 231 {
 232   return core_hdr (abfd)->cd_cursig;
 233 }
 234
 235 static boolean
 236 DEFUN(aix386_core_file_matches_executable_p, (core_bfd, exec_bfd),
 237       bfd *core_bfd AND
 238       bfd *exec_bfd)
 239 {
 240   return true;                  /* FIXME, We have no way of telling at this
 241                                    point */
 242 }
 243
 244 /* No archive file support via this BFD */
 245 #define aix386_openr_next_archived_file bfd_generic_openr_next_archived_file
 246 #define aix386_generic_stat_arch_elt    bfd_generic_stat_arch_elt
 247 #define aix386_slurp_armap                      bfd_false
 248 #define aix386_slurp_extended_name_table        bfd_true
 249 #define aix386_write_armap                      (PROTO (boolean, (*),   \
 250      (bfd *arch, unsigned int elength, struct orl *map, \
 251       unsigned int orl_count, int stridx))) bfd_false
 252 #define aix386_truncate_arname          bfd_dont_truncate_arname
 253
 254 #define aix386_close_and_cleanup                bfd_generic_close_and_cleanup
 255 #define aix386_set_section_contents             (PROTO(boolean, (*),    \
 256          (bfd *abfd, asection *section, PTR data, file_ptr offset,      \
 257          bfd_size_type count))) bfd_false
 258 #define aix386_get_section_contents             bfd_generic_get_section_contents
 259 #define aix386_new_section_hook         (PROTO (boolean, (*),   \
 260         (bfd *, sec_ptr))) bfd_true
 261 #define aix386_get_symtab_upper_bound   bfd_0u
 262 #define aix386_get_symtab                       (PROTO (unsigned int, (*), \
 263         (bfd *, struct symbol_cache_entry **))) bfd_0u
 264 #define aix386_get_reloc_upper_bound            (PROTO (unsigned int, (*), \
 265         (bfd *, sec_ptr))) bfd_0u
 266 #define aix386_canonicalize_reloc               (PROTO (unsigned int, (*), \
 267         (bfd *, sec_ptr, arelent **, struct symbol_cache_entry**))) bfd_0u
 268 #define aix386_make_empty_symbol                (PROTO (                \
 269         struct symbol_cache_entry *, (*), (bfd *))) bfd_false
 270 #define aix386_print_symbol                     (PROTO (void, (*),      \
 271         (bfd *, PTR, struct symbol_cache_entry  *,                      \
 272          bfd_print_symbol_type))) bfd_false
 273 #define aix386_get_symbol_info                  (PROTO (void, (*),      \
 274         (bfd *, struct symbol_cache_entry  *,                   \
 275          symbol_info *))) bfd_false
 276 #define aix386_get_lineno                       (PROTO (alent *, (*),   \
 277         (bfd *, struct symbol_cache_entry *))) bfd_nullvoidptr
 278 #define aix386_set_arch_mach                    (PROTO (boolean, (*),   \
 279         (bfd *, enum bfd_architecture, unsigned long))) bfd_false
 280 #define aix386_find_nearest_line                (PROTO (boolean, (*),   \
 281         (bfd *abfd, struct sec  *section,                               \
 282          struct symbol_cache_entry  **symbols,bfd_vma offset,           \
 283          CONST char **file, CONST char **func, unsigned int *line))) bfd_false
 284 #define aix386_sizeof_headers           (PROTO (int, (*),       \
 285         (bfd *, boolean))) bfd_0
 286
 287 #define aix386_bfd_debug_info_start             bfd_void
 288 #define aix386_bfd_debug_info_end               bfd_void
 289 #define aix386_bfd_debug_info_accumulate        (PROTO (void, (*),      \
 290         (bfd *, struct sec *))) bfd_void
 291 #define aix386_bfd_get_relocated_section_contents bfd_generic_get_relocated_section_contents
 292 #define aix386_bfd_relax_section bfd_generic_relax_section
 293 #define aix386_bfd_seclet_link \
 294   ((boolean (*) PARAMS ((bfd *, PTR, boolean))) bfd_false)
 295 #define aix386_bfd_reloc_type_lookup \
 296   ((CONST struct reloc_howto_struct *(*) PARAMS ((bfd *, bfd_reloc_code_real_type))) bfd_nullvoidptr)
 297 #define aix386_bfd_make_debug_symbol \
 298   ((asymbol *(*) PARAMS ((bfd *, void *, unsigned long))) bfd_nullvoidptr)
 299
 300 /* If somebody calls any byte-swapping routines, shoot them.  */
 301 void
 302 swap_abort()
 303 {
 304   abort(); /* This way doesn't require any declaration for ANSI to fuck up */
 305 }
 306 #define NO_GET  ((PROTO(bfd_vma, (*), (         bfd_byte *))) swap_abort )
 307 #define NO_GETS ((PROTO(bfd_signed_vma, (*), (  bfd_byte *))) swap_abort )
 308 #define NO_PUT  ((PROTO(void,    (*), (bfd_vma, bfd_byte *))) swap_abort )
 309
 310 bfd_target aix386_core_vec =
 311   {
 312     "aix386-core",
 313     bfd_target_unknown_flavour,
 314     true,                       /* target byte order */
 315     true,                       /* target headers byte order */
 316   (HAS_RELOC | EXEC_P |         /* object flags */
 317    HAS_LINENO | HAS_DEBUG |
 318    HAS_SYMS | HAS_LOCALS | WP_TEXT),
 319
 320   (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
 321     0,                                          /* leading underscore */
 322     ' ',                                        /* ar_pad_char */
 323     16,                                         /* ar_max_namelen */
 324     3,                                          /* minimum alignment power */
 325     NO_GET, NO_GETS, NO_PUT,
 326     NO_GET, NO_GETS, NO_PUT,
 327     NO_GET, NO_GETS, NO_PUT, /* data */
 328     NO_GET, NO_GETS, NO_PUT,
 329     NO_GET, NO_GETS, NO_PUT,
 330     NO_GET, NO_GETS, NO_PUT, /* hdrs */
 331
 332     {_bfd_dummy_target, _bfd_dummy_target,
 333      _bfd_dummy_target, aix386_core_file_p},
 334     {bfd_false, bfd_false,      /* bfd_create_object */
 335      bfd_false, bfd_false},
 336     {bfd_false, bfd_false,      /* bfd_write_contents */
 337      bfd_false, bfd_false},
 338
 339     JUMP_TABLE(aix386),
 340     (PTR) 0
 341 };