| 1 | /* BFD back end for Lynx core files |
| 2 | Copyright (C) 1993-2020 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 3 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., 51 Franklin Street - Fifth Floor, Boston, |
| 20 | MA 02110-1301, USA. */ |
| 21 | |
| 22 | #include "sysdep.h" |
| 23 | #include "bfd.h" |
| 24 | #include "libbfd.h" |
| 25 | |
| 26 | #ifdef LYNX_CORE |
| 27 | |
| 28 | #include <sys/conf.h> |
| 29 | #include <sys/kernel.h> |
| 30 | /* sys/kernel.h should define this, but doesn't always, sigh. */ |
| 31 | #ifndef __LYNXOS |
| 32 | #define __LYNXOS |
| 33 | #endif |
| 34 | #include <sys/mem.h> |
| 35 | #include <sys/signal.h> |
| 36 | #include <sys/time.h> |
| 37 | #include <sys/resource.h> |
| 38 | #include <sys/itimer.h> |
| 39 | #include <sys/file.h> |
| 40 | #include <sys/proc.h> |
| 41 | |
| 42 | /* These are stored in the bfd's tdata */ |
| 43 | |
| 44 | struct lynx_core_struct |
| 45 | { |
| 46 | int sig; |
| 47 | char cmd[PNMLEN + 1]; |
| 48 | }; |
| 49 | |
| 50 | #define core_hdr(bfd) ((bfd)->tdata.lynx_core_data) |
| 51 | #define core_signal(bfd) (core_hdr(bfd)->sig) |
| 52 | #define core_command(bfd) (core_hdr(bfd)->cmd) |
| 53 | |
| 54 | #define lynx_core_file_matches_executable_p generic_core_file_matches_executable_p |
| 55 | #define lynx_core_file_pid _bfd_nocore_core_file_pid |
| 56 | |
| 57 | /* Handle Lynx core dump file. */ |
| 58 | |
| 59 | static asection * |
| 60 | make_bfd_asection (bfd *abfd, |
| 61 | const char *name, |
| 62 | flagword flags, |
| 63 | bfd_size_type size, |
| 64 | bfd_vma vma, |
| 65 | file_ptr filepos) |
| 66 | { |
| 67 | asection *asect; |
| 68 | char *newname; |
| 69 | |
| 70 | newname = bfd_alloc (abfd, (bfd_size_type) strlen (name) + 1); |
| 71 | if (!newname) |
| 72 | return NULL; |
| 73 | |
| 74 | strcpy (newname, name); |
| 75 | |
| 76 | asect = bfd_make_section_with_flags (abfd, newname, flags); |
| 77 | if (!asect) |
| 78 | return NULL; |
| 79 | |
| 80 | asect->size = size; |
| 81 | asect->vma = vma; |
| 82 | asect->filepos = filepos; |
| 83 | asect->alignment_power = 2; |
| 84 | |
| 85 | return asect; |
| 86 | } |
| 87 | |
| 88 | bfd_cleanup |
| 89 | lynx_core_file_p (bfd *abfd) |
| 90 | { |
| 91 | int secnum; |
| 92 | struct pssentry pss; |
| 93 | bfd_size_type tcontext_size; |
| 94 | core_st_t *threadp; |
| 95 | int pagesize; |
| 96 | asection *newsect; |
| 97 | size_t amt; |
| 98 | |
| 99 | pagesize = getpagesize (); /* Serious cross-target issue here... This |
| 100 | really needs to come from a system-specific |
| 101 | header file. */ |
| 102 | |
| 103 | /* Get the pss entry from the core file */ |
| 104 | |
| 105 | if (bfd_seek (abfd, (file_ptr) 0, SEEK_SET) != 0) |
| 106 | return NULL; |
| 107 | |
| 108 | amt = sizeof pss; |
| 109 | if (bfd_bread ((void *) &pss, amt, abfd) != amt) |
| 110 | { |
| 111 | /* Too small to be a core file */ |
| 112 | if (bfd_get_error () != bfd_error_system_call) |
| 113 | bfd_set_error (bfd_error_wrong_format); |
| 114 | return NULL; |
| 115 | } |
| 116 | |
| 117 | amt = sizeof (struct lynx_core_struct); |
| 118 | core_hdr (abfd) = (struct lynx_core_struct *) bfd_zalloc (abfd, amt); |
| 119 | |
| 120 | if (!core_hdr (abfd)) |
| 121 | return NULL; |
| 122 | |
| 123 | strncpy (core_command (abfd), pss.pname, PNMLEN + 1); |
| 124 | |
| 125 | /* Compute the size of the thread contexts */ |
| 126 | |
| 127 | tcontext_size = pss.threadcnt * sizeof (core_st_t); |
| 128 | |
| 129 | /* Save thread contexts */ |
| 130 | if (bfd_seek (abfd, pagesize, SEEK_SET) != 0) |
| 131 | goto fail; |
| 132 | threadp = (core_st_t *) _bfd_alloc_and_read (abfd, tcontext_size, |
| 133 | tcontext_size); |
| 134 | if (!threadp) |
| 135 | goto fail; |
| 136 | |
| 137 | core_signal (abfd) = threadp->currsig; |
| 138 | |
| 139 | newsect = make_bfd_asection (abfd, ".stack", |
| 140 | SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS, |
| 141 | pss.ssize, |
| 142 | pss.slimit, |
| 143 | pagesize + tcontext_size); |
| 144 | if (!newsect) |
| 145 | goto fail; |
| 146 | |
| 147 | newsect = make_bfd_asection (abfd, ".data", |
| 148 | SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS, |
| 149 | pss.data_len + pss.bss_len, |
| 150 | pss.data_start, |
| 151 | pagesize + tcontext_size + pss.ssize |
| 152 | #if defined (SPARC) || defined (__SPARC__) |
| 153 | /* SPARC Lynx seems to start dumping |
| 154 | the .data section at a page |
| 155 | boundary. It's OK to check a |
| 156 | #define like SPARC here because this |
| 157 | file can only be compiled on a Lynx |
| 158 | host. */ |
| 159 | + pss.data_start % pagesize |
| 160 | #endif |
| 161 | ); |
| 162 | if (!newsect) |
| 163 | goto fail; |
| 164 | |
| 165 | /* And, now for the .reg/XXX pseudo sections. Each thread has it's own |
| 166 | .reg/XXX section, where XXX is the thread id (without leading zeros). The |
| 167 | currently running thread (at the time of the core dump) also has an alias |
| 168 | called `.reg' (just to keep GDB happy). Note that we use `.reg/XXX' as |
| 169 | opposed to `.regXXX' because GDB expects that .reg2 will be the floating- |
| 170 | point registers. */ |
| 171 | |
| 172 | newsect = make_bfd_asection (abfd, ".reg", |
| 173 | SEC_HAS_CONTENTS, |
| 174 | sizeof (core_st_t), |
| 175 | 0, |
| 176 | pagesize); |
| 177 | if (!newsect) |
| 178 | goto fail; |
| 179 | |
| 180 | for (secnum = 0; secnum < pss.threadcnt; secnum++) |
| 181 | { |
| 182 | char secname[100]; |
| 183 | |
| 184 | sprintf (secname, ".reg/%d", BUILDPID (0, threadp[secnum].tid)); |
| 185 | newsect = make_bfd_asection (abfd, secname, |
| 186 | SEC_HAS_CONTENTS, |
| 187 | sizeof (core_st_t), |
| 188 | 0, |
| 189 | pagesize + secnum * sizeof (core_st_t)); |
| 190 | if (!newsect) |
| 191 | goto fail; |
| 192 | } |
| 193 | |
| 194 | return _bfd_no_cleanup; |
| 195 | |
| 196 | fail: |
| 197 | bfd_release (abfd, core_hdr (abfd)); |
| 198 | core_hdr (abfd) = NULL; |
| 199 | bfd_section_list_clear (abfd); |
| 200 | return NULL; |
| 201 | } |
| 202 | |
| 203 | char * |
| 204 | lynx_core_file_failing_command (bfd *abfd) |
| 205 | { |
| 206 | return core_command (abfd); |
| 207 | } |
| 208 | |
| 209 | int |
| 210 | lynx_core_file_failing_signal (bfd *abfd) |
| 211 | { |
| 212 | return core_signal (abfd); |
| 213 | } |
| 214 | |
| 215 | #endif /* LYNX_CORE */ |