1 /* BFD back end for Lynx core files 2 Copyright (C) 1993-2014 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 const bfd_target * 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 bfd_size_type 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 /* Allocate space for the thread contexts */ 130 131 threadp = (core_st_t *) bfd_alloc (abfd, tcontext_size); 132 if (!threadp) 133 goto fail; 134 135 /* Save thread contexts */ 136 137 if (bfd_seek (abfd, (file_ptr) pagesize, SEEK_SET) != 0) 138 goto fail; 139 140 if (bfd_bread ((void *) threadp, tcontext_size, abfd) != tcontext_size) 141 { 142 /* Probably too small to be a core file */ 143 if (bfd_get_error () != bfd_error_system_call) 144 bfd_set_error (bfd_error_wrong_format); 145 goto fail; 146 } 147 148 core_signal (abfd) = threadp->currsig; 149 150 newsect = make_bfd_asection (abfd, ".stack", 151 SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS, 152 pss.ssize, 153 pss.slimit, 154 pagesize + tcontext_size); 155 if (!newsect) 156 goto fail; 157 158 newsect = make_bfd_asection (abfd, ".data", 159 SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS, 160 pss.data_len + pss.bss_len, 161 pss.data_start, 162 pagesize + tcontext_size + pss.ssize 163 #if defined (SPARC) || defined (__SPARC__) 164 /* SPARC Lynx seems to start dumping 165 the .data section at a page 166 boundary. It's OK to check a 167 #define like SPARC here because this 168 file can only be compiled on a Lynx 169 host. */ 170 + pss.data_start % pagesize 171 #endif 172 ); 173 if (!newsect) 174 goto fail; 175 176 /* And, now for the .reg/XXX pseudo sections. Each thread has it's own 177 .reg/XXX section, where XXX is the thread id (without leading zeros). The 178 currently running thread (at the time of the core dump) also has an alias 179 called `.reg' (just to keep GDB happy). Note that we use `.reg/XXX' as 180 opposed to `.regXXX' because GDB expects that .reg2 will be the floating- 181 point registers. */ 182 183 newsect = make_bfd_asection (abfd, ".reg", 184 SEC_HAS_CONTENTS, 185 sizeof (core_st_t), 186 0, 187 pagesize); 188 if (!newsect) 189 goto fail; 190 191 for (secnum = 0; secnum < pss.threadcnt; secnum++) 192 { 193 char secname[100]; 194 195 sprintf (secname, ".reg/%d", BUILDPID (0, threadp[secnum].tid)); 196 newsect = make_bfd_asection (abfd, secname, 197 SEC_HAS_CONTENTS, 198 sizeof (core_st_t), 199 0, 200 pagesize + secnum * sizeof (core_st_t)); 201 if (!newsect) 202 goto fail; 203 } 204 205 return abfd->xvec; 206 207 fail: 208 bfd_release (abfd, core_hdr (abfd)); 209 core_hdr (abfd) = NULL; 210 bfd_section_list_clear (abfd); 211 return NULL; 212 } 213 214 char * 215 lynx_core_file_failing_command (bfd *abfd) 216 { 217 return core_command (abfd); 218 } 219 220 int 221 lynx_core_file_failing_signal (bfd *abfd) 222 { 223 return core_signal (abfd); 224 } 225 226 #endif /* LYNX_CORE */ 227
