1/* BFD back-end for HPPA BSD core files. 2 Copyright (C) 1993-2017 Free Software Foundation, Inc. 3 4 This file is part of BFD, the Binary File Descriptor library. 5 6 This program is free software; you can redistribute it and/or modify 7 it under the terms of the GNU General Public License as published by 8 the Free Software Foundation; either version 3 of the License, or 9 (at your option) any later version. 10 11 This program is distributed in the hope that it will be useful, 12 but WITHOUT ANY WARRANTY; without even the implied warranty of 13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 GNU General Public License for more details. 15 16 You should have received a copy of the GNU General Public License 17 along with this program; if not, write to the Free Software 18 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, 19 MA 02110-1301, 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 "sysdep.h" 37#include "bfd.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#define hppabsd_core_core_file_matches_executable_p generic_core_file_matches_executable_p 52#define hppabsd_core_core_file_pid _bfd_nocore_core_file_pid 53 54/* These are stored in the bfd's tdata. */ 55 56struct hppabsd_core_struct 57{ 58 int sig; 59 char cmd[MAXCOMLEN + 1]; 60 asection *data_section; 61 asection *stack_section; 62 asection *reg_section; 63}; 64 65#define core_hdr(bfd) ((bfd)->tdata.hppabsd_core_data) 66#define core_signal(bfd) (core_hdr(bfd)->sig) 67#define core_command(bfd) (core_hdr(bfd)->cmd) 68#define core_datasec(bfd) (core_hdr(bfd)->data_section) 69#define core_stacksec(bfd) (core_hdr(bfd)->stack_section) 70#define core_regsec(bfd) (core_hdr(bfd)->reg_section) 71 72static asection * 73make_bfd_asection (bfd *abfd, 74 const char *name, 75 flagword flags, 76 bfd_size_type size, 77 file_ptr offset, 78 unsigned int alignment_power) 79{ 80 asection *asect; 81 82 asect = bfd_make_section_with_flags (abfd, name, flags); 83 if (!asect) 84 return NULL; 85 86 asect->size = size; 87 asect->filepos = offset; 88 asect->alignment_power = alignment_power; 89 90 return asect; 91} 92 93static const bfd_target * 94hppabsd_core_core_file_p (bfd *abfd) 95{ 96 int val; 97 struct user u; 98 struct hppabsd_core_struct *coredata; 99 int clicksz; 100 101 /* Try to read in the u-area. We will need information from this 102 to know how to grok the rest of the core structures. */ 103 val = bfd_bread ((void *) &u, (bfd_size_type) sizeof u, abfd); 104 if (val != sizeof u) 105 { 106 if (bfd_get_error () != bfd_error_system_call) 107 bfd_set_error (bfd_error_wrong_format); 108 return NULL; 109 } 110 111 /* Get the page size out of the u structure. This will be different 112 for PA 1.0 machines and PA 1.1 machines. Yuk! */ 113 clicksz = u.u_pcb.pcb_pgsz; 114 115 /* clicksz must be a power of two >= 2k. */ 116 if (clicksz < 0x800 117 || clicksz != (clicksz & -clicksz)) 118 { 119 bfd_set_error (bfd_error_wrong_format); 120 return NULL; 121 } 122 123 /* Sanity checks. Make sure the size of the core file matches the 124 the size computed from information within the core itself. */ 125 { 126 struct stat statbuf; 127 128 if (bfd_stat (abfd, &statbuf) < 0) 129 return NULL; 130 131 if (NBPG * (UPAGES + u.u_dsize + u.u_ssize) > statbuf.st_size) 132 { 133 bfd_set_error (bfd_error_file_truncated); 134 return NULL; 135 } 136 if (clicksz * (UPAGES + u.u_dsize + u.u_ssize) < statbuf.st_size) 137 { 138 /* The file is too big. Maybe it's not a core file 139 or we otherwise have bad values for u_dsize and u_ssize). */ 140 bfd_set_error (bfd_error_wrong_format); 141 return NULL; 142 } 143 } 144 145 /* OK, we believe you. You're a core file (sure, sure). */ 146 147 coredata = (struct hppabsd_core_struct *) 148 bfd_zalloc (abfd, (bfd_size_type) sizeof (struct hppabsd_core_struct)); 149 if (!coredata) 150 return NULL; 151 152 /* Make the core data and available via the tdata part of the BFD. */ 153 abfd->tdata.hppabsd_core_data = coredata; 154 155 /* Create the sections. */ 156 core_stacksec (abfd) = make_bfd_asection (abfd, ".stack", 157 SEC_ALLOC + SEC_HAS_CONTENTS, 158 clicksz * u.u_ssize, 159 NBPG * (USIZE + KSTAKSIZE) 160 + clicksz * u.u_dsize, 2); 161 if (core_stacksec (abfd) == NULL) 162 goto fail; 163 core_stacksec (abfd)->vma = USRSTACK; 164 165 core_datasec (abfd) = make_bfd_asection (abfd, ".data", 166 SEC_ALLOC + SEC_LOAD 167 + SEC_HAS_CONTENTS, 168 clicksz * u.u_dsize, 169 NBPG * (USIZE + KSTAKSIZE), 2); 170 if (core_datasec (abfd) == NULL) 171 goto fail; 172 core_datasec (abfd)->vma = UDATASEG; 173 174 core_regsec (abfd) = make_bfd_asection (abfd, ".reg", 175 SEC_HAS_CONTENTS, 176 KSTAKSIZE * NBPG, 177 NBPG * USIZE, 2); 178 if (core_regsec (abfd) == NULL) 179 goto fail; 180 core_regsec (abfd)->vma = 0; 181 182 strncpy (core_command (abfd), u.u_comm, MAXCOMLEN + 1); 183 core_signal (abfd) = u.u_code; 184 return abfd->xvec; 185 186 fail: 187 bfd_release (abfd, abfd->tdata.any); 188 abfd->tdata.any = NULL; 189 bfd_section_list_clear (abfd); 190 return NULL; 191} 192 193static char * 194hppabsd_core_core_file_failing_command (bfd *abfd) 195{ 196 return core_command (abfd); 197} 198 199static int 200hppabsd_core_core_file_failing_signal (bfd *abfd) 201{ 202 return core_signal (abfd); 203} 204 205/* If somebody calls any byte-swapping routines, shoot them. */ 206static void 207swap_abort (void) 208{ 209 /* This way doesn't require any declaration for ANSI to fuck up. */ 210 abort (); 211} 212 213#define NO_GET ((bfd_vma (*) (const void *)) swap_abort) 214#define NO_PUT ((void (*) (bfd_vma, void *)) swap_abort) 215#define NO_GETS ((bfd_signed_vma (*) (const void *)) swap_abort) 216#define NO_GET64 ((bfd_uint64_t (*) (const void *)) swap_abort) 217#define NO_PUT64 ((void (*) (bfd_uint64_t, void *)) swap_abort) 218#define NO_GETS64 ((bfd_int64_t (*) (const void *)) swap_abort) 219 220const bfd_target core_hppabsd_vec = 221 { 222 "hppabsd-core", 223 bfd_target_unknown_flavour, 224 BFD_ENDIAN_BIG, /* target byte order */ 225 BFD_ENDIAN_BIG, /* target headers byte order */ 226 (HAS_RELOC | EXEC_P | /* object flags */ 227 HAS_LINENO | HAS_DEBUG | 228 HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED), 229 (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */ 230 0, /* symbol prefix */ 231 ' ', /* ar_pad_char */ 232 16, /* ar_max_namelen */ 233 NO_GET64, NO_GETS64, NO_PUT64, /* 64 bit data */ 234 NO_GET, NO_GETS, NO_PUT, /* 32 bit data */ 235 NO_GET, NO_GETS, NO_PUT, /* 16 bit data */ 236 NO_GET64, NO_GETS64, NO_PUT64, /* 64 bit hdrs */ 237 NO_GET, NO_GETS, NO_PUT, /* 32 bit hdrs */ 238 NO_GET, NO_GETS, NO_PUT, /* 16 bit hdrs */ 239 240 { /* bfd_check_format */ 241 _bfd_dummy_target, /* unknown format */ 242 _bfd_dummy_target, /* object file */ 243 _bfd_dummy_target, /* archive */ 244 hppabsd_core_core_file_p /* a core file */ 245 }, 246 { /* bfd_set_format */ 247 bfd_false, bfd_false, 248 bfd_false, bfd_false 249 }, 250 { /* bfd_write_contents */ 251 bfd_false, bfd_false, 252 bfd_false, bfd_false 253 }, 254 255 BFD_JUMP_TABLE_GENERIC (_bfd_generic), 256 BFD_JUMP_TABLE_COPY (_bfd_generic), 257 BFD_JUMP_TABLE_CORE (hppabsd_core), 258 BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive), 259 BFD_JUMP_TABLE_SYMBOLS (_bfd_nosymbols), 260 BFD_JUMP_TABLE_RELOCS (_bfd_norelocs), 261 BFD_JUMP_TABLE_WRITE (_bfd_generic), 262 BFD_JUMP_TABLE_LINK (_bfd_nolink), 263 BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic), 264 265 NULL, 266 267 NULL /* backend_data */ 268 }; 269#endif 270