| 1 | /* BFD back end for Lynx core files |
| 2 | Copyright 1993 Free Software Foundation, Inc. |
| 3 | Written by Stu Grossman 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 | #include "bfd.h" |
| 22 | #include "sysdep.h" |
| 23 | #include "libbfd.h" |
| 24 | |
| 25 | #ifdef HOST_LYNX /* Core files only work locally for now */ |
| 26 | |
| 27 | /* These are stored in the bfd's tdata */ |
| 28 | |
| 29 | struct lynx_core_struct |
| 30 | { |
| 31 | int sig; |
| 32 | char cmd[PNMLEN + 1]; |
| 33 | }; |
| 34 | |
| 35 | #define core_hdr(bfd) ((bfd)->tdata.lynx_core_data) |
| 36 | #define core_signal(bfd) (core_hdr(bfd)->sig) |
| 37 | #define core_command(bfd) (core_hdr(bfd)->cmd) |
| 38 | |
| 39 | /* Handle Lynx core dump file. */ |
| 40 | |
| 41 | static asection * |
| 42 | make_bfd_asection (abfd, name, flags, _raw_size, vma, filepos) |
| 43 | bfd *abfd; |
| 44 | CONST char *name; |
| 45 | flagword flags; |
| 46 | bfd_size_type _raw_size; |
| 47 | bfd_vma vma; |
| 48 | file_ptr filepos; |
| 49 | { |
| 50 | asection *asect; |
| 51 | char *newname; |
| 52 | |
| 53 | newname = bfd_alloc (abfd, strlen (name) + 1); |
| 54 | if (!newname) |
| 55 | return NULL; |
| 56 | |
| 57 | strcpy (newname, name); |
| 58 | |
| 59 | asect = bfd_make_section (abfd, newname); |
| 60 | if (!asect) |
| 61 | return NULL; |
| 62 | |
| 63 | asect->flags = flags; |
| 64 | asect->_raw_size = _raw_size; |
| 65 | asect->vma = vma; |
| 66 | asect->filepos = filepos; |
| 67 | asect->alignment_power = 2; |
| 68 | |
| 69 | return asect; |
| 70 | } |
| 71 | |
| 72 | /* ARGSUSED */ |
| 73 | bfd_target * |
| 74 | lynx_core_file_p (abfd) |
| 75 | bfd *abfd; |
| 76 | { |
| 77 | int val; |
| 78 | int secnum; |
| 79 | struct pssentry pss; |
| 80 | size_t tcontext_size; |
| 81 | core_st_t *threadp; |
| 82 | int pagesize; |
| 83 | asection *newsect; |
| 84 | |
| 85 | pagesize = getpagesize (); /* Serious cross-target issue here... This |
| 86 | really needs to come from a system-specific |
| 87 | header file. */ |
| 88 | |
| 89 | /* Get the pss entry from the core file */ |
| 90 | |
| 91 | bfd_seek (abfd, 0, SEEK_SET); |
| 92 | |
| 93 | val = bfd_read ((void *)&pss, 1, sizeof pss, abfd); |
| 94 | if (val != sizeof pss) |
| 95 | { |
| 96 | /* Too small to be a core file */ |
| 97 | bfd_error = wrong_format; |
| 98 | return NULL; |
| 99 | } |
| 100 | |
| 101 | core_hdr (abfd) = (struct lynx_core_struct *) |
| 102 | bfd_zalloc (abfd, sizeof (struct lynx_core_struct)); |
| 103 | |
| 104 | if (!core_hdr (abfd)) |
| 105 | { |
| 106 | bfd_error = no_memory; |
| 107 | return NULL; |
| 108 | } |
| 109 | |
| 110 | strncpy (core_command (abfd), pss.pname, PNMLEN + 1); |
| 111 | |
| 112 | /* Compute the size of the thread contexts */ |
| 113 | |
| 114 | tcontext_size = pss.threadcnt * sizeof (core_st_t); |
| 115 | |
| 116 | /* Allocate space for the thread contexts */ |
| 117 | |
| 118 | threadp = (core_st_t *)bfd_zalloc (abfd, tcontext_size); |
| 119 | if (!threadp) |
| 120 | { |
| 121 | bfd_error = no_memory; |
| 122 | return NULL; |
| 123 | } |
| 124 | |
| 125 | /* Save thread contexts */ |
| 126 | |
| 127 | bfd_seek (abfd, pagesize, SEEK_SET); |
| 128 | |
| 129 | val = bfd_read ((void *)threadp, pss.threadcnt, sizeof (core_st_t), abfd); |
| 130 | |
| 131 | if (val != tcontext_size) |
| 132 | { |
| 133 | /* Probably too small to be a core file */ |
| 134 | bfd_error = wrong_format; |
| 135 | return NULL; |
| 136 | } |
| 137 | |
| 138 | core_signal (abfd) = threadp->currsig; |
| 139 | |
| 140 | newsect = make_bfd_asection (abfd, ".stack", |
| 141 | SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS, |
| 142 | pss.ssize, |
| 143 | pss.slimit, |
| 144 | pagesize + tcontext_size); |
| 145 | if (!newsect) |
| 146 | { |
| 147 | bfd_error = no_memory; |
| 148 | return NULL; |
| 149 | } |
| 150 | |
| 151 | newsect = make_bfd_asection (abfd, ".data", |
| 152 | SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS, |
| 153 | pss.data_len + pss.bss_len, |
| 154 | pss.data_start, |
| 155 | pagesize + tcontext_size + pss.ssize); |
| 156 | if (!newsect) |
| 157 | { |
| 158 | bfd_error = no_memory; |
| 159 | return NULL; |
| 160 | } |
| 161 | |
| 162 | for (secnum = 0; secnum < pss.threadcnt; secnum++) |
| 163 | { |
| 164 | char secname[100]; |
| 165 | |
| 166 | sprintf (secname, ".reg%d", threadp[secnum].tid); |
| 167 | newsect = make_bfd_asection (abfd, secname, |
| 168 | SEC_ALLOC + SEC_HAS_CONTENTS, |
| 169 | sizeof (core_st_t), |
| 170 | 0, |
| 171 | pagesize + secnum * sizeof (core_st_t)); |
| 172 | if (!newsect) |
| 173 | { |
| 174 | bfd_error = no_memory; |
| 175 | return NULL; |
| 176 | } |
| 177 | } |
| 178 | |
| 179 | return abfd->xvec; |
| 180 | } |
| 181 | |
| 182 | char * |
| 183 | lynx_core_file_failing_command (abfd) |
| 184 | bfd *abfd; |
| 185 | { |
| 186 | return core_command (abfd); |
| 187 | } |
| 188 | |
| 189 | /* ARGSUSED */ |
| 190 | int |
| 191 | lynx_core_file_failing_signal (abfd) |
| 192 | bfd *abfd; |
| 193 | { |
| 194 | return core_signal (abfd); |
| 195 | } |
| 196 | |
| 197 | /* ARGSUSED */ |
| 198 | boolean |
| 199 | lynx_core_file_matches_executable_p (core_bfd, exec_bfd) |
| 200 | bfd *core_bfd, *exec_bfd; |
| 201 | { |
| 202 | return true; /* FIXME, We have no way of telling at this point */ |
| 203 | } |
| 204 | |
| 205 | #endif /* HOST_LYNX */ |