From 252b5132c753830d5fd56823373aed85f2a0db63 Mon Sep 17 00:00:00 2001 From: Richard Henderson Date: Mon, 3 May 1999 07:29:11 +0000 Subject: 19990502 sourceware import --- bfd/trad-core.c | 316 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 316 insertions(+) create mode 100644 bfd/trad-core.c (limited to 'bfd/trad-core.c') diff --git a/bfd/trad-core.c b/bfd/trad-core.c new file mode 100644 index 00000000000..21d920b0e87 --- /dev/null +++ b/bfd/trad-core.c @@ -0,0 +1,316 @@ +/* BFD back end for traditional Unix core files (U-area and raw sections) + Copyright 1988, 89, 91, 92, 93, 94, 95, 96, 1998 + Free Software Foundation, Inc. + Written by John Gilmore of Cygnus Support. + +This file is part of BFD, the Binary File Descriptor library. + +This program is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2 of the License, or +(at your option) any later version. + +This program is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with this program; if not, write to the Free Software +Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ + +#include "bfd.h" +#include "sysdep.h" +#include "libbfd.h" +#include "libaout.h" /* BFD a.out internal data structures */ + +#include +#include +#include + +#include /* After a.out.h */ + +#ifdef TRAD_HEADER +#include TRAD_HEADER +#endif + + struct trad_core_struct + { + asection *data_section; + asection *stack_section; + asection *reg_section; + struct user u; + }; + +#define core_upage(bfd) (&((bfd)->tdata.trad_core_data->u)) +#define core_datasec(bfd) ((bfd)->tdata.trad_core_data->data_section) +#define core_stacksec(bfd) ((bfd)->tdata.trad_core_data->stack_section) +#define core_regsec(bfd) ((bfd)->tdata.trad_core_data->reg_section) + +/* forward declarations */ + +const bfd_target *trad_unix_core_file_p PARAMS ((bfd *abfd)); +char * trad_unix_core_file_failing_command PARAMS ((bfd *abfd)); +int trad_unix_core_file_failing_signal PARAMS ((bfd *abfd)); +boolean trad_unix_core_file_matches_executable_p + PARAMS ((bfd *core_bfd, bfd *exec_bfd)); +static void swap_abort PARAMS ((void)); + +/* Handle 4.2-style (and perhaps also sysV-style) core dump file. */ + +/* ARGSUSED */ +const bfd_target * +trad_unix_core_file_p (abfd) + bfd *abfd; + +{ + int val; + struct user u; + struct trad_core_struct *rawptr; + +#ifdef TRAD_CORE_USER_OFFSET + /* If defined, this macro is the file position of the user struct. */ + if (bfd_seek (abfd, TRAD_CORE_USER_OFFSET, SEEK_SET) != 0) + return 0; +#endif + + val = bfd_read ((void *)&u, 1, sizeof u, abfd); + if (val != sizeof u) + { + /* Too small to be a core file */ + bfd_set_error (bfd_error_wrong_format); + return 0; + } + + /* Sanity check perhaps??? */ + if (u.u_dsize > 0x1000000) /* Remember, it's in pages... */ + { + bfd_set_error (bfd_error_wrong_format); + return 0; + } + if (u.u_ssize > 0x1000000) + { + bfd_set_error (bfd_error_wrong_format); + return 0; + } + + /* Check that the size claimed is no greater than the file size. */ + { + FILE *stream = bfd_cache_lookup (abfd); + struct stat statbuf; + if (stream == NULL) + return 0; + if (fstat (fileno (stream), &statbuf) < 0) + { + bfd_set_error (bfd_error_system_call); + return 0; + } + if (NBPG * (UPAGES + u.u_dsize +#ifdef TRAD_CORE_DSIZE_INCLUDES_TSIZE + - u.u_tsize +#endif + + u.u_ssize) > statbuf.st_size) + { + bfd_set_error (bfd_error_file_truncated); + return 0; + } +#ifndef TRAD_CORE_ALLOW_ANY_EXTRA_SIZE + if (NBPG * (UPAGES + u.u_dsize + u.u_ssize) +#ifdef TRAD_CORE_EXTRA_SIZE_ALLOWED + /* Some systems write the file too big. */ + + TRAD_CORE_EXTRA_SIZE_ALLOWED +#endif + < statbuf.st_size) + { + /* The file is too big. Maybe it's not a core file + or we otherwise have bad values for u_dsize and u_ssize). */ + bfd_set_error (bfd_error_wrong_format); + return 0; + } +#endif + } + + /* OK, we believe you. You're a core file (sure, sure). */ + + /* Allocate both the upage and the struct core_data at once, so + a single free() will free them both. */ + rawptr = (struct trad_core_struct *) + bfd_zmalloc (sizeof (struct trad_core_struct)); + if (rawptr == NULL) + return 0; + + abfd->tdata.trad_core_data = rawptr; + + rawptr->u = u; /*Copy the uarea into the tdata part of the bfd */ + + /* Create the sections. This is raunchy, but bfd_close wants to free + them separately. */ + + core_stacksec(abfd) = (asection *) bfd_zalloc (abfd, sizeof (asection)); + if (core_stacksec (abfd) == NULL) + return NULL; + core_datasec (abfd) = (asection *) bfd_zalloc (abfd, sizeof (asection)); + if (core_datasec (abfd) == NULL) + return NULL; + core_regsec (abfd) = (asection *) bfd_zalloc (abfd, sizeof (asection)); + if (core_regsec (abfd) == NULL) + return NULL; + + core_stacksec (abfd)->name = ".stack"; + core_datasec (abfd)->name = ".data"; + core_regsec (abfd)->name = ".reg"; + + core_stacksec (abfd)->flags = SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS; + core_datasec (abfd)->flags = SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS; + core_regsec (abfd)->flags = SEC_HAS_CONTENTS; + + core_datasec (abfd)->_raw_size = NBPG * u.u_dsize +#ifdef TRAD_CORE_DSIZE_INCLUDES_TSIZE + - NBPG * u.u_tsize +#endif + ; + core_stacksec (abfd)->_raw_size = NBPG * u.u_ssize; + core_regsec (abfd)->_raw_size = NBPG * UPAGES; /* Larger than sizeof struct u */ + + /* What a hack... we'd like to steal it from the exec file, + since the upage does not seem to provide it. FIXME. */ +#ifdef HOST_DATA_START_ADDR + core_datasec (abfd)->vma = HOST_DATA_START_ADDR; +#else + core_datasec (abfd)->vma = HOST_TEXT_START_ADDR + (NBPG * u.u_tsize); +#endif + +#ifdef HOST_STACK_START_ADDR + core_stacksec (abfd)->vma = HOST_STACK_START_ADDR; +#else + core_stacksec (abfd)->vma = HOST_STACK_END_ADDR - (NBPG * u.u_ssize); +#endif + + /* This is tricky. As the "register section", we give them the entire + upage and stack. u.u_ar0 points to where "register 0" is stored. + There are two tricks with this, though. One is that the rest of the + registers might be at positive or negative (or both) displacements + from *u_ar0. The other is that u_ar0 is sometimes an absolute address + in kernel memory, and on other systems it is an offset from the beginning + of the `struct user'. + + As a practical matter, we don't know where the registers actually are, + so we have to pass the whole area to GDB. We encode the value of u_ar0 + by setting the .regs section up so that its virtual memory address + 0 is at the place pointed to by u_ar0 (by setting the vma of the start + of the section to -u_ar0). GDB uses this info to locate the regs, + using minor trickery to get around the offset-or-absolute-addr problem. */ + core_regsec (abfd)->vma = 0 - (bfd_vma) u.u_ar0; + + core_datasec (abfd)->filepos = NBPG * UPAGES; + core_stacksec (abfd)->filepos = (NBPG * UPAGES) + NBPG * u.u_dsize +#ifdef TRAD_CORE_DSIZE_INCLUDES_TSIZE + - NBPG * u.u_tsize +#endif + ; + core_regsec (abfd)->filepos = 0; /* Register segment is the upage */ + + /* Align to word at least */ + core_stacksec (abfd)->alignment_power = 2; + core_datasec (abfd)->alignment_power = 2; + core_regsec (abfd)->alignment_power = 2; + + abfd->sections = core_stacksec (abfd); + core_stacksec (abfd)->next = core_datasec (abfd); + core_datasec (abfd)->next = core_regsec (abfd); + abfd->section_count = 3; + + return abfd->xvec; +} + +char * +trad_unix_core_file_failing_command (abfd) + bfd *abfd; +{ +#ifndef NO_CORE_COMMAND + char *com = abfd->tdata.trad_core_data->u.u_comm; + if (*com) + return com; + else +#endif + return 0; +} + +/* ARGSUSED */ +int +trad_unix_core_file_failing_signal (ignore_abfd) + bfd *ignore_abfd; +{ +#ifdef TRAD_UNIX_CORE_FILE_FAILING_SIGNAL + return TRAD_UNIX_CORE_FILE_FAILING_SIGNAL(ignore_abfd); +#else + return -1; /* FIXME, where is it? */ +#endif +} + +/* ARGSUSED */ +boolean +trad_unix_core_file_matches_executable_p (core_bfd, exec_bfd) + bfd *core_bfd, *exec_bfd; +{ + return true; /* FIXME, We have no way of telling at this point */ +} + +/* If somebody calls any byte-swapping routines, shoot them. */ +static void +swap_abort() +{ + abort(); /* This way doesn't require any declaration for ANSI to fuck up */ +} +#define NO_GET ((bfd_vma (*) PARAMS (( const bfd_byte *))) swap_abort ) +#define NO_PUT ((void (*) PARAMS ((bfd_vma, bfd_byte *))) swap_abort ) +#define NO_SIGNED_GET \ + ((bfd_signed_vma (*) PARAMS ((const bfd_byte *))) swap_abort ) + +const bfd_target trad_core_vec = + { + "trad-core", + bfd_target_unknown_flavour, + BFD_ENDIAN_UNKNOWN, /* target byte order */ + BFD_ENDIAN_UNKNOWN, /* target headers byte order */ + (HAS_RELOC | EXEC_P | /* object flags */ + HAS_LINENO | HAS_DEBUG | + HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED), + (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */ + 0, /* symbol prefix */ + ' ', /* ar_pad_char */ + 16, /* ar_max_namelen */ + NO_GET, NO_SIGNED_GET, NO_PUT, /* 64 bit data */ + NO_GET, NO_SIGNED_GET, NO_PUT, /* 32 bit data */ + NO_GET, NO_SIGNED_GET, NO_PUT, /* 16 bit data */ + NO_GET, NO_SIGNED_GET, NO_PUT, /* 64 bit hdrs */ + NO_GET, NO_SIGNED_GET, NO_PUT, /* 32 bit hdrs */ + NO_GET, NO_SIGNED_GET, NO_PUT, /* 16 bit hdrs */ + + { /* bfd_check_format */ + _bfd_dummy_target, /* unknown format */ + _bfd_dummy_target, /* object file */ + _bfd_dummy_target, /* archive */ + trad_unix_core_file_p /* a core file */ + }, + { /* bfd_set_format */ + bfd_false, bfd_false, + bfd_false, bfd_false + }, + { /* bfd_write_contents */ + bfd_false, bfd_false, + bfd_false, bfd_false + }, + + BFD_JUMP_TABLE_GENERIC (_bfd_generic), + BFD_JUMP_TABLE_COPY (_bfd_generic), + BFD_JUMP_TABLE_CORE (trad_unix), + BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive), + BFD_JUMP_TABLE_SYMBOLS (_bfd_nosymbols), + BFD_JUMP_TABLE_RELOCS (_bfd_norelocs), + BFD_JUMP_TABLE_WRITE (_bfd_generic), + BFD_JUMP_TABLE_LINK (_bfd_nolink), + BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic), + + (PTR) 0 /* backend_data */ +}; -- cgit v1.2.1