X-Git-Url: http://git.efficios.com/?a=blobdiff_plain;f=bfd%2Ftrad-core.c;h=2473a319b132c7976500f4558601c67accfa4c64;hb=75bf2c9cf7dc7dad5e99f337a5d4f677e71dadc9;hp=a4f13e36685fd42352820e7907b2a852a7c2fbaf;hpb=7307c104b356373188b1caf03c9925b60381d07d;p=deliverable%2Fbinutils-gdb.git diff --git a/bfd/trad-core.c b/bfd/trad-core.c index a4f13e3668..2473a319b1 100644 --- a/bfd/trad-core.c +++ b/bfd/trad-core.c @@ -1,131 +1,169 @@ /* BFD back end for traditional Unix core files (U-area and raw sections) - Copyright (C) 1988, 1989, 1991 Free Software Foundation, Inc. + Copyright (C) 1988-2021 Free Software Foundation, Inc. Written by John Gilmore of Cygnus Support. -This file is part of BFD, the Binary File Descriptor library. + 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 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. + 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., 675 Mass Ave, Cambridge, MA 02139, USA. */ + 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. */ -/* This file does not define a particular back-end, but it defines routines - that can be used by other back-ends. */ -#include +#include "sysdep.h" #include "bfd.h" -#include #include "libbfd.h" +#include "libaout.h" /* BFD a.out internal data structures */ -#include "libaout.h" /* BFD a.out internal data structures */ - -#include #include -#include +#include #include -#include #include /* After a.out.h */ -#include -#include +#ifdef TRAD_HEADER +#include TRAD_HEADER +#endif -/* need this cast b/c ptr is really void * */ -#define core_hdr(bfd) (((struct core_data *) (bfd->tdata))->hdr) -#define core_datasec(bfd) (((struct core_data *) ((bfd)->tdata))->data_section) -#define core_stacksec(bfd) (((struct core_data*)((bfd)->tdata))->stack_section) -#define core_regsec(bfd) (((struct core_data *) ((bfd)->tdata))->reg_section) -#define core_upage(bfd) (((struct core_data *) ((bfd)->tdata))->upage) +#ifndef NBPG +# define NBPG getpagesize() +#endif -/* These are stored in the bfd's tdata */ -struct core_data { - struct user *upage; /* core file header */ +struct trad_core_struct +{ asection *data_section; asection *stack_section; asection *reg_section; + struct user u; }; -/* ARGSUSED */ -bfd_target * -trad_unix_core_file_p (abfd) - bfd *abfd; +#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 bfd_cleanup +trad_unix_core_file_p (bfd *abfd) { -#if HOST_SYS == SUN4_SYS - return 0; -#else int val; - char *rawptr; struct user u; - unsigned int reg_offset, fp_reg_offset; + struct trad_core_struct *rawptr; + size_t amt; + flagword flags; - /* 4.2-style (and perhaps also sysV-style) core dump file. */ +#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_read ((void *)&u, 1, sizeof u, abfd); + val = bfd_bread ((void *) &u, (bfd_size_type) sizeof u, abfd); if (val != sizeof u) - return 0; /* Too small to be a core file */ + { + /* 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... */ - return 0; + if (u.u_dsize > 0x1000000) /* Remember, it's in pages... */ + { + bfd_set_error (bfd_error_wrong_format); + return 0; + } if (u.u_ssize > 0x1000000) - return 0; - /* Check that the size claimed is no greater than the file size. FIXME. */ + { + 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. */ - rawptr = (char *)zalloc (sizeof (u) + sizeof (struct core_data)); - if (rawptr == NULL) { - bfd_error = no_memory; - return 0; - } - - set_tdata (abfd, (struct core_data *)rawptr); - core_upage (abfd) = (struct user *)(rawptr + sizeof (struct core_data)); - *core_upage (abfd) = u; /* Save that upage! */ - - /* create the sections. This is raunchy, but bfd_close wants to reclaim - them */ - core_stacksec (abfd) = (asection *) zalloc (sizeof (asection)); - if (core_stacksec (abfd) == NULL) { -loser: - bfd_error = no_memory; - free ((void *)rawptr); + amt = sizeof (struct trad_core_struct); + rawptr = (struct trad_core_struct *) bfd_zmalloc (amt); + if (rawptr == NULL) return 0; - } - core_datasec (abfd) = (asection *) zalloc (sizeof (asection)); - if (core_datasec (abfd) == NULL) { -loser1: - free ((void *)core_stacksec (abfd)); - goto loser; - } - core_regsec (abfd) = (asection *) zalloc (sizeof (asection)); - if (core_regsec (abfd) == NULL) { -loser2: - free ((void *)core_datasec (abfd)); - goto loser1; - } - core_stacksec (abfd)->name = ".stack"; - core_datasec (abfd)->name = ".data"; - core_regsec (abfd)->name = ".reg"; + abfd->tdata.trad_core_data = rawptr; - core_stacksec (abfd)->flags = SEC_ALLOC + SEC_LOAD; - core_datasec (abfd)->flags = SEC_ALLOC + SEC_LOAD; - core_regsec (abfd)->flags = SEC_ALLOC; + rawptr->u = u; /*Copy the uarea into the tdata part of the bfd */ - core_datasec (abfd)->size = NBPG * u.u_dsize; + /* 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 */ + 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. */ @@ -134,49 +172,139 @@ loser2: #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); - core_regsec (abfd)->vma = -1; +#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; - core_regsec (abfd)->filepos = 0; /* Register segment is the upage */ + 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 _bfd_no_cleanup; - return abfd->xvec; -#endif + fail: + bfd_release (abfd, abfd->tdata.any); + abfd->tdata.any = NULL; + bfd_section_list_clear (abfd); + return NULL; } -char * -trad_unix_core_file_failing_command (abfd) - bfd *abfd; +static char * +trad_unix_core_file_failing_command (bfd *abfd) { - if (*core_upage (abfd)->u_comm) - return core_upage (abfd)->u_comm; +#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; +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 } - -/* ARGSUSED */ -boolean -trad_unix_core_file_matches_executable_p (core_bfd, exec_bfd) - bfd *core_bfd, *exec_bfd; + +/* If somebody calls any byte-swapping routines, shoot them. */ +static void +swap_abort (void) { - return true; /* FIXME, We have no way of telling at this point */ + 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 core_trad_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. */ + TARGET_KEEP_UNUSED_SECTION_SYMBOLS, /* keep unused section symbols. */ + 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_bool_bfd_false_error, + _bfd_bool_bfd_false_error, + _bfd_bool_bfd_false_error, + _bfd_bool_bfd_false_error + }, + { /* bfd_write_contents */ + _bfd_bool_bfd_false_error, + _bfd_bool_bfd_false_error, + _bfd_bool_bfd_false_error, + _bfd_bool_bfd_false_error + }, + + 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 */ + };