1 /* BFD back-end for HPPA BSD core files. 2 Copyright 1993, 1994, 1995, 1998, 1999, 2001 3 Free Software Foundation, Inc. 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. 20 21 Written by the Center for Software Science at the University of Utah 22 and by Cygnus Support. 23 24 The core file structure for the Utah 4.3BSD and OSF1 ports on the 25 PA is a mix between traditional cores and hpux cores -- just 26 different enough that supporting this format would tend to add 27 gross hacks to trad-core.c or hpux-core.c. So instead we keep any 28 gross hacks isolated to this file. */ 29 30 /* This file can only be compiled on systems which use HPPA-BSD style 31 core files. 32 33 I would not expect this to be of use to any other host/target, but 34 you never know. */ 35 36 #include "bfd.h" 37 #include "sysdep.h" 38 #include "libbfd.h" 39 40 #if defined (HOST_HPPABSD) 41 42 #include "machine/vmparam.h" 43 44 #include <sys/param.h> 45 #include <sys/dir.h> 46 #include <signal.h> 47 #include <machine/reg.h> 48 #include <sys/user.h> /* After a.out.h */ 49 #include <sys/file.h> 50 51 static asection *make_bfd_asection PARAMS ((bfd *, CONST char *, 52 flagword, bfd_size_type, 53 file_ptr, unsigned int)); 54 static asymbol *hppabsd_core_make_empty_symbol PARAMS ((bfd *)); 55 static const bfd_target *hppabsd_core_core_file_p PARAMS ((bfd *)); 56 static char *hppabsd_core_core_file_failing_command PARAMS ((bfd *)); 57 static int hppabsd_core_core_file_failing_signal PARAMS ((bfd *)); 58 static boolean hppabsd_core_core_file_matches_executable_p 59 PARAMS ((bfd *, bfd *)); 60 static void swap_abort PARAMS ((void)); 61 62 /* These are stored in the bfd's tdata. */ 63 64 struct hppabsd_core_struct 65 { 66 int sig; 67 char cmd[MAXCOMLEN + 1]; 68 asection *data_section; 69 asection *stack_section; 70 asection *reg_section; 71 }; 72 73 #define core_hdr(bfd) ((bfd)->tdata.hppabsd_core_data) 74 #define core_signal(bfd) (core_hdr(bfd)->sig) 75 #define core_command(bfd) (core_hdr(bfd)->cmd) 76 #define core_datasec(bfd) (core_hdr(bfd)->data_section) 77 #define core_stacksec(bfd) (core_hdr(bfd)->stack_section) 78 #define core_regsec(bfd) (core_hdr(bfd)->reg_section) 79 80 static asection * 81 make_bfd_asection (abfd, name, flags, _raw_size, offset, alignment_power) 82 bfd *abfd; 83 CONST char *name; 84 flagword flags; 85 bfd_size_type _raw_size; 86 file_ptr offset; 87 unsigned int alignment_power; 88 { 89 asection *asect; 90 91 asect = bfd_make_section (abfd, name); 92 if (!asect) 93 return NULL; 94 95 asect->flags = flags; 96 asect->_raw_size = _raw_size; 97 asect->filepos = offset; 98 asect->alignment_power = alignment_power; 99 100 return asect; 101 } 102 103 static asymbol * 104 hppabsd_core_make_empty_symbol (abfd) 105 bfd *abfd; 106 { 107 asymbol *new = (asymbol *) bfd_zalloc (abfd, sizeof (asymbol)); 108 if (new) 109 new->the_bfd = abfd; 110 return new; 111 } 112 113 static const bfd_target * 114 hppabsd_core_core_file_p (abfd) 115 bfd *abfd; 116 { 117 int val; 118 struct user u; 119 struct hppabsd_core_struct *coredata; 120 int clicksz; 121 122 /* Try to read in the u-area. We will need information from this 123 to know how to grok the rest of the core structures. */ 124 val = bfd_read ((void *) &u, 1, sizeof u, abfd); 125 if (val != sizeof u) 126 { 127 if (bfd_get_error () != bfd_error_system_call) 128 bfd_set_error (bfd_error_wrong_format); 129 return NULL; 130 } 131 132 /* Get the page size out of the u structure. This will be different 133 for PA 1.0 machines and PA 1.1 machines. Yuk! */ 134 clicksz = u.u_pcb.pcb_pgsz; 135 136 /* clicksz must be a power of two >= 2k. */ 137 if (clicksz < 0x800 138 || clicksz != (clicksz & -clicksz)) 139 { 140 bfd_set_error (bfd_error_wrong_format); 141 return NULL; 142 } 143 144 /* Sanity checks. Make sure the size of the core file matches the 145 the size computed from information within the core itself. */ 146 { 147 FILE *stream = bfd_cache_lookup (abfd); 148 struct stat statbuf; 149 if (stream == NULL || fstat (fileno (stream), &statbuf) < 0) 150 { 151 bfd_set_error (bfd_error_system_call); 152 return NULL; 153 } 154 if (NBPG * (UPAGES + u.u_dsize + u.u_ssize) > statbuf.st_size) 155 { 156 bfd_set_error (bfd_error_file_truncated); 157 return NULL; 158 } 159 if (clicksz * (UPAGES + u.u_dsize + u.u_ssize) < statbuf.st_size) 160 { 161 /* The file is too big. Maybe it's not a core file 162 or we otherwise have bad values for u_dsize and u_ssize). */ 163 bfd_set_error (bfd_error_wrong_format); 164 return NULL; 165 } 166 } 167 168 /* OK, we believe you. You're a core file (sure, sure). */ 169 170 coredata = (struct hppabsd_core_struct *) 171 bfd_zalloc (abfd, sizeof (struct hppabsd_core_struct)); 172 if (!coredata) 173 return NULL; 174 175 /* Make the core data and available via the tdata part of the BFD. */ 176 abfd->tdata.hppabsd_core_data = coredata; 177 178 /* Create the sections. */ 179 core_stacksec (abfd) = make_bfd_asection (abfd, ".stack", 180 SEC_ALLOC + SEC_HAS_CONTENTS, 181 clicksz * u.u_ssize, 182 NBPG * (USIZE + KSTAKSIZE) 183 + clicksz * u.u_dsize, 2); 184 core_stacksec (abfd)->vma = USRSTACK; 185 186 core_datasec (abfd) = make_bfd_asection (abfd, ".data", 187 SEC_ALLOC + SEC_LOAD 188 + SEC_HAS_CONTENTS, 189 clicksz * u.u_dsize, 190 NBPG * (USIZE + KSTAKSIZE), 2); 191 core_datasec (abfd)->vma = UDATASEG; 192 193 core_regsec (abfd) = make_bfd_asection (abfd, ".reg", 194 SEC_HAS_CONTENTS, 195 KSTAKSIZE * NBPG, 196 NBPG * USIZE, 2); 197 core_regsec (abfd)->vma = 0; 198 199 strncpy (core_command (abfd), u.u_comm, MAXCOMLEN + 1); 200 core_signal (abfd) = u.u_code; 201 return abfd->xvec; 202 } 203 204 static char * 205 hppabsd_core_core_file_failing_command (abfd) 206 bfd *abfd; 207 { 208 return core_command (abfd); 209 } 210 211 /* ARGSUSED */ 212 static int 213 hppabsd_core_core_file_failing_signal (abfd) 214 bfd *abfd; 215 { 216 return core_signal (abfd); 217 } 218 219 /* ARGSUSED */ 220 static boolean 221 hppabsd_core_core_file_matches_executable_p (core_bfd, exec_bfd) 222 bfd *core_bfd, *exec_bfd; 223 { 224 /* There's no way to know this... */ 225 return true; 226 } 227 228 #define hppabsd_core_get_symtab_upper_bound \ 229 _bfd_nosymbols_get_symtab_upper_bound 230 #define hppabsd_core_get_symtab _bfd_nosymbols_get_symtab 231 #define hppabsd_core_print_symbol _bfd_nosymbols_print_symbol 232 #define hppabsd_core_get_symbol_info _bfd_nosymbols_get_symbol_info 233 #define hppabsd_core_bfd_is_local_label_name \ 234 _bfd_nosymbols_bfd_is_local_label_name 235 #define hppabsd_core_get_lineno _bfd_nosymbols_get_lineno 236 #define hppabsd_core_find_nearest_line _bfd_nosymbols_find_nearest_line 237 #define hppabsd_core_bfd_make_debug_symbol _bfd_nosymbols_bfd_make_debug_symbol 238 #define hppabsd_core_read_minisymbols _bfd_nosymbols_read_minisymbols 239 #define hppabsd_core_minisymbol_to_symbol _bfd_nosymbols_minisymbol_to_symbol 240 241 /* If somebody calls any byte-swapping routines, shoot them. */ 242 static void 243 swap_abort () 244 { 245 /* This way doesn't require any declaration for ANSI to fuck up. */ 246 abort (); 247 } 248 249 #define NO_GET ((bfd_vma (*) PARAMS (( const bfd_byte *))) swap_abort ) 250 #define NO_PUT ((void (*) PARAMS ((bfd_vma, bfd_byte *))) swap_abort ) 251 #define NO_SIGNED_GET \ 252 ((bfd_signed_vma (*) PARAMS ((const bfd_byte *))) swap_abort ) 253 254 const bfd_target hppabsd_core_vec = 255 { 256 "hppabsd-core", 257 bfd_target_unknown_flavour, 258 BFD_ENDIAN_BIG, /* target byte order */ 259 BFD_ENDIAN_BIG, /* target headers byte order */ 260 (HAS_RELOC | EXEC_P | /* object flags */ 261 HAS_LINENO | HAS_DEBUG | 262 HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED), 263 (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */ 264 0, /* symbol prefix */ 265 ' ', /* ar_pad_char */ 266 16, /* ar_max_namelen */ 267 NO_GET, NO_SIGNED_GET, NO_PUT, /* 64 bit data */ 268 NO_GET, NO_SIGNED_GET, NO_PUT, /* 32 bit data */ 269 NO_GET, NO_SIGNED_GET, NO_PUT, /* 16 bit data */ 270 NO_GET, NO_SIGNED_GET, NO_PUT, /* 64 bit hdrs */ 271 NO_GET, NO_SIGNED_GET, NO_PUT, /* 32 bit hdrs */ 272 NO_GET, NO_SIGNED_GET, NO_PUT, /* 16 bit hdrs */ 273 274 { /* bfd_check_format */ 275 _bfd_dummy_target, /* unknown format */ 276 _bfd_dummy_target, /* object file */ 277 _bfd_dummy_target, /* archive */ 278 hppabsd_core_core_file_p /* a core file */ 279 }, 280 { /* bfd_set_format */ 281 bfd_false, bfd_false, 282 bfd_false, bfd_false 283 }, 284 { /* bfd_write_contents */ 285 bfd_false, bfd_false, 286 bfd_false, bfd_false 287 }, 288 289 BFD_JUMP_TABLE_GENERIC (_bfd_generic), 290 BFD_JUMP_TABLE_COPY (_bfd_generic), 291 BFD_JUMP_TABLE_CORE (hppabsd_core), 292 BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive), 293 BFD_JUMP_TABLE_SYMBOLS (hppabsd_core), 294 BFD_JUMP_TABLE_RELOCS (_bfd_norelocs), 295 BFD_JUMP_TABLE_WRITE (_bfd_generic), 296 BFD_JUMP_TABLE_LINK (_bfd_nolink), 297 BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic), 298 299 NULL, 300 301 (PTR) 0 /* backend_data */ 302 }; 303 #endif 304