| 1 | /* BFD back end for traditional Unix core files (U-area and raw sections) |
| 2 | Copyright (C) 1988, 1989, 1991 Free Software Foundation, Inc. |
| 3 | Written by John Gilmore of Cygnus Support. |
| 4 | |
| 5 | This file is part of BFD, the Binary File Descriptor library. |
| 6 | |
| 7 | This program is free software; you can redistribute it and/or modify |
| 8 | it under the terms of the GNU General Public License as published by |
| 9 | the Free Software Foundation; either version 2 of the License, or |
| 10 | (at your option) any later version. |
| 11 | |
| 12 | This program is distributed in the hope that it will be useful, |
| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | GNU General Public License for more details. |
| 16 | |
| 17 | You should have received a copy of the GNU General Public License |
| 18 | along with this program; if not, write to the Free Software |
| 19 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ |
| 20 | |
| 21 | /* To use this file on a particular host, configure the host with these |
| 22 | parameters in the config/h-HOST file: |
| 23 | |
| 24 | HDEFINES=-DTRAD_CORE |
| 25 | HDEPFILES=trad-core.o |
| 26 | |
| 27 | */ |
| 28 | |
| 29 | #include "bfd.h" |
| 30 | #include "sysdep.h" |
| 31 | #include "libbfd.h" |
| 32 | #include "libaout.h" /* BFD a.out internal data structures */ |
| 33 | |
| 34 | #include <stdio.h> |
| 35 | #include <sys/types.h> |
| 36 | #include <sys/param.h> |
| 37 | #include <sys/dir.h> |
| 38 | #include <signal.h> |
| 39 | #include <machine/reg.h> |
| 40 | |
| 41 | #include <sys/user.h> /* After a.out.h */ |
| 42 | #include <sys/file.h> |
| 43 | |
| 44 | #include <errno.h> |
| 45 | |
| 46 | /* These are stored in the bfd's tdata */ |
| 47 | struct core_data { |
| 48 | struct user *upage; /* core file header */ |
| 49 | asection *data_section; |
| 50 | asection *stack_section; |
| 51 | asection *reg_section; |
| 52 | }; |
| 53 | |
| 54 | #define core_hdr(bfd) (((struct core_data *) (bfd->tdata))->hdr) |
| 55 | #define core_upage(bfd) (((struct core_data *) ((bfd)->tdata))->upage) |
| 56 | #define core_datasec(bfd) (((struct core_data *) ((bfd)->tdata))->data_section) |
| 57 | #define core_stacksec(bfd) (((struct core_data*)((bfd)->tdata))->stack_section) |
| 58 | #define core_regsec(bfd) (((struct core_data *) ((bfd)->tdata))->reg_section) |
| 59 | |
| 60 | /* Handle 4.2-style (and perhaps also sysV-style) core dump file. */ |
| 61 | |
| 62 | /* ARGSUSED */ |
| 63 | bfd_target * |
| 64 | trad_unix_core_file_p (abfd) |
| 65 | bfd *abfd; |
| 66 | { |
| 67 | int val; |
| 68 | struct user u; |
| 69 | unsigned int reg_offset, fp_reg_offset; |
| 70 | /* This struct is just for allocating two things with one zalloc, so |
| 71 | they will be freed together, without violating alignment constraints. */ |
| 72 | struct core_user { |
| 73 | struct core_data coredata; |
| 74 | struct user u; |
| 75 | } *rawptr; |
| 76 | |
| 77 | val = bfd_read ((void *)&u, 1, sizeof u, abfd); |
| 78 | if (val != sizeof u) |
| 79 | return 0; /* Too small to be a core file */ |
| 80 | |
| 81 | /* Sanity check perhaps??? */ |
| 82 | if (u.u_dsize > 0x1000000) /* Remember, it's in pages... */ |
| 83 | return 0; |
| 84 | if (u.u_ssize > 0x1000000) |
| 85 | return 0; |
| 86 | /* Check that the size claimed is no greater than the file size. FIXME. */ |
| 87 | |
| 88 | /* OK, we believe you. You're a core file (sure, sure). */ |
| 89 | |
| 90 | /* Allocate both the upage and the struct core_data at once, so |
| 91 | a single free() will free them both. */ |
| 92 | rawptr = (struct core_user *)bfd_zalloc (abfd, sizeof (struct core_user)); |
| 93 | if (rawptr == NULL) { |
| 94 | bfd_error = no_memory; |
| 95 | return 0; |
| 96 | } |
| 97 | |
| 98 | set_tdata (abfd, &rawptr->coredata); |
| 99 | core_upage (abfd) = &rawptr->u; |
| 100 | *core_upage (abfd) = u; /* Save that upage! */ |
| 101 | |
| 102 | /* Create the sections. This is raunchy, but bfd_close wants to free |
| 103 | them separately. */ |
| 104 | core_stacksec (abfd) = (asection *) zalloc (sizeof (asection)); |
| 105 | if (core_stacksec (abfd) == NULL) { |
| 106 | loser: |
| 107 | bfd_error = no_memory; |
| 108 | free ((void *)rawptr); |
| 109 | return 0; |
| 110 | } |
| 111 | core_datasec (abfd) = (asection *) zalloc (sizeof (asection)); |
| 112 | if (core_datasec (abfd) == NULL) { |
| 113 | loser1: |
| 114 | free ((void *)core_stacksec (abfd)); |
| 115 | goto loser; |
| 116 | } |
| 117 | core_regsec (abfd) = (asection *) zalloc (sizeof (asection)); |
| 118 | if (core_regsec (abfd) == NULL) { |
| 119 | loser2: |
| 120 | free ((void *)core_datasec (abfd)); |
| 121 | goto loser1; |
| 122 | } |
| 123 | |
| 124 | core_stacksec (abfd)->name = ".stack"; |
| 125 | core_datasec (abfd)->name = ".data"; |
| 126 | core_regsec (abfd)->name = ".reg"; |
| 127 | |
| 128 | core_stacksec (abfd)->flags = SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS; |
| 129 | core_datasec (abfd)->flags = SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS; |
| 130 | core_regsec (abfd)->flags = SEC_ALLOC + SEC_HAS_CONTENTS; |
| 131 | |
| 132 | core_datasec (abfd)->size = NBPG * u.u_dsize; |
| 133 | core_stacksec (abfd)->size = NBPG * u.u_ssize; |
| 134 | core_regsec (abfd)->size = NBPG * UPAGES; /* Larger than sizeof struct u */ |
| 135 | |
| 136 | /* What a hack... we'd like to steal it from the exec file, |
| 137 | since the upage does not seem to provide it. FIXME. */ |
| 138 | #ifdef HOST_DATA_START_ADDR |
| 139 | core_datasec (abfd)->vma = HOST_DATA_START_ADDR; |
| 140 | #else |
| 141 | core_datasec (abfd)->vma = HOST_TEXT_START_ADDR + (NBPG * u.u_tsize); |
| 142 | #endif |
| 143 | core_stacksec (abfd)->vma = HOST_STACK_END_ADDR - (NBPG * u.u_ssize); |
| 144 | /* This is tricky. As the "register section", we give them the entire |
| 145 | upage and stack. u.u_ar0 points to where "register 0" is stored. |
| 146 | There are two tricks with this, though. One is that the rest of the |
| 147 | registers might be at positive or negative (or both) displacements |
| 148 | from *u_ar0. The other is that u_ar0 is sometimes an absolute address |
| 149 | in kernel memory, and on other systems it is an offset from the beginning |
| 150 | of the `struct user'. |
| 151 | |
| 152 | As a practical matter, we don't know where the registers actually are, |
| 153 | so we have to pass the whole area to GDB. We encode the value of u_ar0 |
| 154 | by setting the .regs section up so that its virtual memory address |
| 155 | 0 is at the place pointed to by u_ar0 (by setting the vma of the start |
| 156 | of the section to -u_ar0). GDB uses this info to locate the regs, |
| 157 | using minor trickery to get around the offset-or-absolute-addr problem. */ |
| 158 | core_regsec (abfd)->vma = 0 - (int) u.u_ar0; |
| 159 | |
| 160 | core_datasec (abfd)->filepos = NBPG * UPAGES; |
| 161 | core_stacksec (abfd)->filepos = (NBPG * UPAGES) + NBPG * u.u_dsize; |
| 162 | core_regsec (abfd)->filepos = 0; /* Register segment is the upage */ |
| 163 | |
| 164 | /* Align to word at least */ |
| 165 | core_stacksec (abfd)->alignment_power = 2; |
| 166 | core_datasec (abfd)->alignment_power = 2; |
| 167 | core_regsec (abfd)->alignment_power = 2; |
| 168 | |
| 169 | abfd->sections = core_stacksec (abfd); |
| 170 | core_stacksec (abfd)->next = core_datasec (abfd); |
| 171 | core_datasec (abfd)->next = core_regsec (abfd); |
| 172 | abfd->section_count = 3; |
| 173 | |
| 174 | return abfd->xvec; |
| 175 | } |
| 176 | |
| 177 | char * |
| 178 | trad_unix_core_file_failing_command (abfd) |
| 179 | bfd *abfd; |
| 180 | { |
| 181 | if (*core_upage (abfd)->u_comm) |
| 182 | return core_upage (abfd)->u_comm; |
| 183 | else |
| 184 | return 0; |
| 185 | } |
| 186 | |
| 187 | /* ARGSUSED */ |
| 188 | int |
| 189 | trad_unix_core_file_failing_signal (ignore_abfd) |
| 190 | bfd *ignore_abfd; |
| 191 | { |
| 192 | return -1; /* FIXME, where is it? */ |
| 193 | } |
| 194 | |
| 195 | /* ARGSUSED */ |
| 196 | boolean |
| 197 | trad_unix_core_file_matches_executable_p (core_bfd, exec_bfd) |
| 198 | bfd *core_bfd, *exec_bfd; |
| 199 | { |
| 200 | return true; /* FIXME, We have no way of telling at this point */ |
| 201 | } |
| 202 | \f |
| 203 | /* No archive file support via this BFD */ |
| 204 | #define trad_unix_openr_next_archived_file bfd_generic_openr_next_archived_file |
| 205 | #define trad_unix_generic_stat_arch_elt bfd_generic_stat_arch_elt |
| 206 | #define trad_unix_slurp_armap bfd_false |
| 207 | #define trad_unix_slurp_extended_name_table bfd_true |
| 208 | #define trad_unix_write_armap (PROTO (boolean, (*), \ |
| 209 | (bfd *arch, unsigned int elength, struct orl *map, int orl_count, \ |
| 210 | int stridx))) bfd_false |
| 211 | #define trad_unix_truncate_arname bfd_dont_truncate_arname |
| 212 | #define aout_32_openr_next_archived_file bfd_generic_openr_next_archived_file |
| 213 | |
| 214 | #define trad_unix_close_and_cleanup bfd_generic_close_and_cleanup |
| 215 | #define trad_unix_set_section_contents (PROTO(boolean, (*), \ |
| 216 | (bfd *abfd, asection *section, PTR data, file_ptr offset, \ |
| 217 | bfd_size_type count))) bfd_false |
| 218 | #define trad_unix_get_section_contents bfd_generic_get_section_contents |
| 219 | #define trad_unix_new_section_hook (PROTO (boolean, (*), \ |
| 220 | (bfd *, sec_ptr))) bfd_true |
| 221 | #define trad_unix_get_symtab_upper_bound bfd_0u |
| 222 | #define trad_unix_get_symtab (PROTO (unsigned int, (*), \ |
| 223 | (bfd *, struct symbol_cache_entry **))) bfd_0u |
| 224 | #define trad_unix_get_reloc_upper_bound (PROTO (unsigned int, (*), \ |
| 225 | (bfd *, sec_ptr))) bfd_0u |
| 226 | #define trad_unix_canonicalize_reloc (PROTO (unsigned int, (*), \ |
| 227 | (bfd *, sec_ptr, arelent **, struct symbol_cache_entry**))) bfd_0u |
| 228 | #define trad_unix_make_empty_symbol (PROTO ( \ |
| 229 | struct symbol_cache_entry *, (*), (bfd *))) bfd_false |
| 230 | #define trad_unix_print_symbol (PROTO (void, (*), \ |
| 231 | (bfd *, PTR, struct symbol_cache_entry *, \ |
| 232 | bfd_print_symbol_type))) bfd_false |
| 233 | #define trad_unix_get_lineno (PROTO (alent *, (*), \ |
| 234 | (bfd *, struct symbol_cache_entry *))) bfd_nullvoidptr |
| 235 | #define trad_unix_set_arch_mach (PROTO (boolean, (*), \ |
| 236 | (bfd *, enum bfd_architecture, unsigned long))) bfd_false |
| 237 | #define trad_unix_find_nearest_line (PROTO (boolean, (*), \ |
| 238 | (bfd *abfd, struct sec *section, \ |
| 239 | struct symbol_cache_entry **symbols,bfd_vma offset, \ |
| 240 | CONST char **file, CONST char **func, unsigned int *line))) bfd_false |
| 241 | #define trad_unix_sizeof_headers (PROTO (int, (*), \ |
| 242 | (bfd *, boolean))) bfd_0 |
| 243 | |
| 244 | #define trad_unix_bfd_debug_info_start bfd_void |
| 245 | #define trad_unix_bfd_debug_info_end bfd_void |
| 246 | #define trad_unix_bfd_debug_info_accumulate (PROTO (void, (*), \ |
| 247 | (bfd *, struct sec *))) bfd_void |
| 248 | |
| 249 | /* If somebody calls any byte-swapping routines, shoot them. */ |
| 250 | void |
| 251 | swap_abort() |
| 252 | { |
| 253 | abort(); /* This way doesn't require any declaration for ANSI to fuck up */ |
| 254 | } |
| 255 | #define NO_GET ((PROTO(bfd_vma, (*), ( bfd_byte *))) swap_abort ) |
| 256 | #define NO_PUT ((PROTO(void, (*), (bfd_vma, bfd_byte *))) swap_abort ) |
| 257 | |
| 258 | bfd_target trad_core_vec = |
| 259 | { |
| 260 | "trad-core", |
| 261 | bfd_target_unknown_flavour, |
| 262 | true, /* target byte order */ |
| 263 | true, /* target headers byte order */ |
| 264 | (HAS_RELOC | EXEC_P | /* object flags */ |
| 265 | HAS_LINENO | HAS_DEBUG | |
| 266 | HAS_SYMS | HAS_LOCALS | DYNAMIC | WP_TEXT | D_PAGED), |
| 267 | (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */ |
| 268 | ' ', /* ar_pad_char */ |
| 269 | 16, /* ar_max_namelen */ |
| 270 | 3, /* minimum alignment power */ |
| 271 | NO_GET, NO_PUT, NO_GET, NO_PUT, NO_GET, NO_PUT, /* data */ |
| 272 | NO_GET, NO_PUT, NO_GET, NO_PUT, NO_GET, NO_PUT, /* hdrs */ |
| 273 | |
| 274 | {_bfd_dummy_target, _bfd_dummy_target, |
| 275 | _bfd_dummy_target, trad_unix_core_file_p}, |
| 276 | {bfd_false, bfd_false, /* bfd_create_object */ |
| 277 | bfd_false, bfd_false}, |
| 278 | {bfd_false, bfd_false, /* bfd_write_contents */ |
| 279 | bfd_false, bfd_false}, |
| 280 | |
| 281 | JUMP_TABLE(trad_unix) |
| 282 | }; |