ptrace-core.c revision 130561
1/* BFD backend for core files which use the ptrace_user structure 2 Copyright 1993, 1994, 1995, 1996, 1998, 1999, 2001, 2002, 2003, 2004 3 Free Software Foundation, Inc. 4 The structure of this file is based on trad-core.c written by John Gilmore 5 of Cygnus Support. 6 Modified to work with the ptrace_user structure by Kevin A. Buettner. 7 (Longterm it may be better to merge this file with trad-core.c) 8 9This file is part of BFD, the Binary File Descriptor library. 10 11This program is free software; you can redistribute it and/or modify 12it under the terms of the GNU General Public License as published by 13the Free Software Foundation; either version 2 of the License, or 14(at your option) any later version. 15 16This program is distributed in the hope that it will be useful, 17but WITHOUT ANY WARRANTY; without even the implied warranty of 18MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 19GNU General Public License for more details. 20 21You should have received a copy of the GNU General Public License 22along with this program; if not, write to the Free Software 23Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ 24 25#ifdef PTRACE_CORE 26 27#include "bfd.h" 28#include "sysdep.h" 29#include "libbfd.h" 30 31#include <sys/param.h> 32#include <sys/dir.h> 33#include <signal.h> 34#include <sys/ptrace.h> 35 36struct trad_core_struct 37 { 38 asection *data_section; 39 asection *stack_section; 40 asection *reg_section; 41 struct ptrace_user u; 42 }; 43 44#define core_upage(bfd) (&((bfd)->tdata.trad_core_data->u)) 45#define core_datasec(bfd) ((bfd)->tdata.trad_core_data->data_section) 46#define core_stacksec(bfd) ((bfd)->tdata.trad_core_data->stack_section) 47#define core_regsec(bfd) ((bfd)->tdata.trad_core_data->reg_section) 48 49/* forward declarations */ 50 51const bfd_target *ptrace_unix_core_file_p PARAMS ((bfd *abfd)); 52char * ptrace_unix_core_file_failing_command PARAMS ((bfd *abfd)); 53int ptrace_unix_core_file_failing_signal PARAMS ((bfd *abfd)); 54bfd_boolean ptrace_unix_core_file_matches_executable_p 55 PARAMS ((bfd *core_bfd, bfd *exec_bfd)); 56static void swap_abort PARAMS ((void)); 57 58const bfd_target * 59ptrace_unix_core_file_p (abfd) 60 bfd *abfd; 61 62{ 63 int val; 64 struct ptrace_user u; 65 struct trad_core_struct *rawptr; 66 bfd_size_type amt; 67 68 val = bfd_bread ((void *)&u, (bfd_size_type) sizeof u, abfd); 69 if (val != sizeof u || u.pt_magic != _BCS_PTRACE_MAGIC 70 || u.pt_rev != _BCS_PTRACE_REV) 71 { 72 /* Too small to be a core file */ 73 bfd_set_error (bfd_error_wrong_format); 74 return 0; 75 } 76 77 /* OK, we believe you. You're a core file (sure, sure). */ 78 79 /* Allocate both the upage and the struct core_data at once, so 80 a single free() will free them both. */ 81 amt = sizeof (struct trad_core_struct); 82 rawptr = (struct trad_core_struct *) bfd_zalloc (abfd, amt); 83 84 if (rawptr == NULL) 85 return 0; 86 87 abfd->tdata.trad_core_data = rawptr; 88 89 rawptr->u = u; /*Copy the uarea into the tdata part of the bfd */ 90 91 /* Create the sections. */ 92 93 core_stacksec (abfd) = bfd_make_section_anyway (abfd, ".stack"); 94 if (core_stacksec (abfd) == NULL) 95 goto fail; 96 core_datasec (abfd) = bfd_make_section_anyway (abfd, ".data"); 97 if (core_datasec (abfd) == NULL) 98 goto fail; 99 core_regsec (abfd) = bfd_make_section_anyway (abfd, ".reg"); 100 if (core_regsec (abfd) == NULL) 101 goto fail; 102 103 /* FIXME: Need to worry about shared memory, library data, and library 104 text. I don't think that any of these things are supported on the 105 system on which I am developing this for though. */ 106 107 core_stacksec (abfd)->flags = SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS; 108 core_datasec (abfd)->flags = SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS; 109 core_regsec (abfd)->flags = SEC_HAS_CONTENTS; 110 111 core_datasec (abfd)->_raw_size = u.pt_dsize; 112 core_stacksec (abfd)->_raw_size = u.pt_ssize; 113 core_regsec (abfd)->_raw_size = sizeof (u); 114 115 core_datasec (abfd)->vma = u.pt_o_data_start; 116 core_stacksec (abfd)->vma = USRSTACK - u.pt_ssize; 117 core_regsec (abfd)->vma = 0 - sizeof (u); /* see trad-core.c */ 118 119 core_datasec (abfd)->filepos = (int) u.pt_dataptr; 120 core_stacksec (abfd)->filepos = (int) (u.pt_dataptr + u.pt_dsize); 121 core_regsec (abfd)->filepos = 0; /* Register segment is ptrace_user */ 122 123 /* Align to word at least */ 124 core_stacksec (abfd)->alignment_power = 2; 125 core_datasec (abfd)->alignment_power = 2; 126 core_regsec (abfd)->alignment_power = 2; 127 128 return abfd->xvec; 129 130 fail: 131 bfd_release (abfd, abfd->tdata.any); 132 abfd->tdata.any = NULL; 133 bfd_section_list_clear (abfd); 134 return NULL; 135} 136 137char * 138ptrace_unix_core_file_failing_command (abfd) 139 bfd *abfd; 140{ 141 char *com = abfd->tdata.trad_core_data->u.pt_comm; 142 if (*com) 143 return com; 144 else 145 return 0; 146} 147 148int 149ptrace_unix_core_file_failing_signal (abfd) 150 bfd *abfd; 151{ 152 return abfd->tdata.trad_core_data->u.pt_sigframe.sig_num; 153} 154 155bfd_boolean 156ptrace_unix_core_file_matches_executable_p (core_bfd, exec_bfd) 157 bfd *core_bfd, *exec_bfd; 158{ 159 /* FIXME: Use pt_timdat field of the ptrace_user structure to match 160 the date of the executable */ 161 return TRUE; 162} 163 164/* If somebody calls any byte-swapping routines, shoot them. */ 165static void 166swap_abort () 167{ 168 abort (); /* This way doesn't require any declaration for ANSI to fuck up */ 169} 170 171#define NO_GET ((bfd_vma (*) (const void *)) swap_abort) 172#define NO_PUT ((void (*) (bfd_vma, void *)) swap_abort) 173#define NO_GETS ((bfd_signed_vma (*) (const void *)) swap_abort) 174#define NO_GET64 ((bfd_uint64_t (*) (const void *)) swap_abort) 175#define NO_PUT64 ((void (*) (bfd_uint64_t, void *)) swap_abort) 176#define NO_GETS64 ((bfd_int64_t (*) (const void *)) swap_abort) 177 178const bfd_target ptrace_core_vec = 179 { 180 "trad-core", 181 bfd_target_unknown_flavour, 182 BFD_ENDIAN_UNKNOWN, /* target byte order */ 183 BFD_ENDIAN_UNKNOWN, /* target headers byte order */ 184 (HAS_RELOC | EXEC_P | /* object flags */ 185 HAS_LINENO | HAS_DEBUG | 186 HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED), 187 (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */ 188 0, /* symbol prefix */ 189 ' ', /* ar_pad_char */ 190 16, /* ar_max_namelen */ 191 NO_GET64, NO_GETS64, NO_PUT64, /* 64 bit data */ 192 NO_GET, NO_GETS, NO_PUT, /* 32 bit data */ 193 NO_GET, NO_GETS, NO_PUT, /* 16 bit data */ 194 NO_GET64, NO_GETS64, NO_PUT64, /* 64 bit hdrs */ 195 NO_GET, NO_GETS, NO_PUT, /* 32 bit hdrs */ 196 NO_GET, NO_GETS, NO_PUT, /* 16 bit hdrs */ 197 198 { /* bfd_check_format */ 199 _bfd_dummy_target, /* unknown format */ 200 _bfd_dummy_target, /* object file */ 201 _bfd_dummy_target, /* archive */ 202 ptrace_unix_core_file_p /* a core file */ 203 }, 204 { /* bfd_set_format */ 205 bfd_false, bfd_false, 206 bfd_false, bfd_false 207 }, 208 { /* bfd_write_contents */ 209 bfd_false, bfd_false, 210 bfd_false, bfd_false 211 }, 212 213 BFD_JUMP_TABLE_GENERIC (_bfd_generic), 214 BFD_JUMP_TABLE_COPY (_bfd_generic), 215 BFD_JUMP_TABLE_CORE (ptrace_unix), 216 BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive), 217 BFD_JUMP_TABLE_SYMBOLS (_bfd_nosymbols), 218 BFD_JUMP_TABLE_RELOCS (_bfd_norelocs), 219 BFD_JUMP_TABLE_WRITE (_bfd_generic), 220 BFD_JUMP_TABLE_LINK (_bfd_nolink), 221 BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic), 222 223 NULL, 224 225 (PTR) 0 /* backend_data */ 226 }; 227 228#endif /* PTRACE_CORE */ 229