| 1 | /* BFD back-end for HPPA BSD core files. |
| 2 | Copyright (C) 1993-2020 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 | |
| 56 | struct 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 | |
| 72 | static asection * |
| 73 | make_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 | |
| 93 | static const bfd_target * |
| 94 | hppabsd_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 | |
| 193 | static char * |
| 194 | hppabsd_core_core_file_failing_command (bfd *abfd) |
| 195 | { |
| 196 | return core_command (abfd); |
| 197 | } |
| 198 | |
| 199 | static int |
| 200 | hppabsd_core_core_file_failing_signal (bfd *abfd) |
| 201 | { |
| 202 | return core_signal (abfd); |
| 203 | } |
| 204 | \f |
| 205 | /* If somebody calls any byte-swapping routines, shoot them. */ |
| 206 | static void |
| 207 | swap_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 | |
| 220 | const 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_bool_bfd_false_error, |
| 248 | _bfd_bool_bfd_false_error, |
| 249 | _bfd_bool_bfd_false_error, |
| 250 | _bfd_bool_bfd_false_error |
| 251 | }, |
| 252 | { /* bfd_write_contents */ |
| 253 | _bfd_bool_bfd_false_error, |
| 254 | _bfd_bool_bfd_false_error, |
| 255 | _bfd_bool_bfd_false_error, |
| 256 | _bfd_bool_bfd_false_error |
| 257 | }, |
| 258 | |
| 259 | BFD_JUMP_TABLE_GENERIC (_bfd_generic), |
| 260 | BFD_JUMP_TABLE_COPY (_bfd_generic), |
| 261 | BFD_JUMP_TABLE_CORE (hppabsd_core), |
| 262 | BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive), |
| 263 | BFD_JUMP_TABLE_SYMBOLS (_bfd_nosymbols), |
| 264 | BFD_JUMP_TABLE_RELOCS (_bfd_norelocs), |
| 265 | BFD_JUMP_TABLE_WRITE (_bfd_generic), |
| 266 | BFD_JUMP_TABLE_LINK (_bfd_nolink), |
| 267 | BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic), |
| 268 | |
| 269 | NULL, |
| 270 | |
| 271 | NULL /* backend_data */ |
| 272 | }; |
| 273 | #endif |