diff options
Diffstat (limited to 'binutils-2.25/bfd/trad-core.c')
| -rw-r--r-- | binutils-2.25/bfd/trad-core.c | 319 |
1 files changed, 319 insertions, 0 deletions
diff --git a/binutils-2.25/bfd/trad-core.c b/binutils-2.25/bfd/trad-core.c new file mode 100644 index 00000000..da52c310 --- /dev/null +++ b/binutils-2.25/bfd/trad-core.c @@ -0,0 +1,319 @@ +/* BFD back end for traditional Unix core files (U-area and raw sections) + Copyright 1988, 1989, 1991, 1992, 1993, 1994, 1995, 1996, 1998, 1999, + 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2011, 2012 + 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 3 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., 51 Franklin Street - Fifth Floor, Boston, + MA 02110-1301, USA. */ + +#include "sysdep.h" +#include "bfd.h" +#include "libbfd.h" +#include "libaout.h" /* BFD a.out internal data structures */ + +#include <sys/param.h> +#ifdef HAVE_DIRENT_H +# include <dirent.h> +#else +# ifdef HAVE_SYS_NDIR_H +# include <sys/ndir.h> +# endif +# ifdef HAVE_SYS_DIR_H +# include <sys/dir.h> +# endif +# ifdef HAVE_NDIR_H +# include <ndir.h> +# endif +#endif +#include <signal.h> + +#include <sys/user.h> /* After a.out.h */ + +#ifdef TRAD_HEADER +#include TRAD_HEADER +#endif + +#ifndef NBPG +# define NBPG getpagesize() +#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 */ + +#define trad_unix_core_file_matches_executable_p generic_core_file_matches_executable_p +#define trad_unix_core_file_pid _bfd_nocore_core_file_pid + + +/* Handle 4.2-style (and perhaps also sysV-style) core dump file. */ + +static const bfd_target * +trad_unix_core_file_p (bfd *abfd) +{ + int val; + struct user u; + struct trad_core_struct *rawptr; + bfd_size_type amt; + flagword flags; + +#ifdef TRAD_CORE_USER_OFFSET + /* If defined, this macro is the file position of the user struct. */ + if (bfd_seek (abfd, (file_ptr) TRAD_CORE_USER_OFFSET, SEEK_SET) != 0) + return 0; +#endif + + val = bfd_bread ((void *) &u, (bfd_size_type) 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. */ + { + struct stat statbuf; + + if (bfd_stat (abfd, &statbuf) < 0) + return 0; + + if ((ufile_ptr) NBPG * (UPAGES + u.u_dsize +#ifdef TRAD_CORE_DSIZE_INCLUDES_TSIZE + - u.u_tsize +#endif + + u.u_ssize) + > (ufile_ptr) statbuf.st_size) + { + bfd_set_error (bfd_error_wrong_format); + return 0; + } +#ifndef TRAD_CORE_ALLOW_ANY_EXTRA_SIZE + if (((ufile_ptr) 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 + ) + < (ufile_ptr) 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. */ + amt = sizeof (struct trad_core_struct); + rawptr = (struct trad_core_struct *) bfd_zmalloc (amt); + 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. */ + + flags = SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS; + core_stacksec(abfd) = bfd_make_section_anyway_with_flags (abfd, ".stack", + flags); + if (core_stacksec (abfd) == NULL) + goto fail; + core_datasec (abfd) = bfd_make_section_anyway_with_flags (abfd, ".data", + flags); + if (core_datasec (abfd) == NULL) + goto fail; + core_regsec (abfd) = bfd_make_section_anyway_with_flags (abfd, ".reg", + SEC_HAS_CONTENTS); + if (core_regsec (abfd) == NULL) + goto fail; + + core_datasec (abfd)->size = NBPG * u.u_dsize +#ifdef TRAD_CORE_DSIZE_INCLUDES_TSIZE + - NBPG * u.u_tsize +#endif + ; + core_stacksec (abfd)->size = NBPG * u.u_ssize; + core_regsec (abfd)->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 = - (bfd_vma) (unsigned long) 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; + + return abfd->xvec; + + fail: + bfd_release (abfd, abfd->tdata.any); + abfd->tdata.any = NULL; + bfd_section_list_clear (abfd); + return NULL; +} + +static char * +trad_unix_core_file_failing_command (bfd *abfd) +{ +#ifndef NO_CORE_COMMAND + char *com = abfd->tdata.trad_core_data->u.u_comm; + if (*com) + return com; + else +#endif + return 0; +} + +static int +trad_unix_core_file_failing_signal (bfd *ignore_abfd ATTRIBUTE_UNUSED) +{ +#ifdef TRAD_UNIX_CORE_FILE_FAILING_SIGNAL + return TRAD_UNIX_CORE_FILE_FAILING_SIGNAL(ignore_abfd); +#else + return -1; /* FIXME, where is it? */ +#endif +} + +/* If somebody calls any byte-swapping routines, shoot them. */ +static void +swap_abort (void) +{ + abort (); /* This way doesn't require any declaration for ANSI to fuck up */ +} + +#define NO_GET ((bfd_vma (*) (const void *)) swap_abort) +#define NO_PUT ((void (*) (bfd_vma, void *)) swap_abort) +#define NO_GETS ((bfd_signed_vma (*) (const void *)) swap_abort) +#define NO_GET64 ((bfd_uint64_t (*) (const void *)) swap_abort) +#define NO_PUT64 ((void (*) (bfd_uint64_t, void *)) swap_abort) +#define NO_GETS64 ((bfd_int64_t (*) (const void *)) 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 */ + 0, /* match priority. */ + NO_GET64, NO_GETS64, NO_PUT64, /* 64 bit data */ + NO_GET, NO_GETS, NO_PUT, /* 32 bit data */ + NO_GET, NO_GETS, NO_PUT, /* 16 bit data */ + NO_GET64, NO_GETS64, NO_PUT64, /* 64 bit hdrs */ + NO_GET, NO_GETS, NO_PUT, /* 32 bit hdrs */ + NO_GET, NO_GETS, 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), + + NULL, + + NULL /* backend_data */ + }; |