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- /* BFD back end for traditional Unix core files (U-area and raw sections)
- Copyright (C) 1988, 1989, 1991 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., 675 Mass Ave, Cambridge, MA 02139, USA. */
-
- /* To use this file on a particular host, configure the host with these
- parameters in the config/h-HOST file:
-
- HDEFINES=-DTRAD_CORE
- HDEPFILES=trad-core.o
-
- */
-
- #include "bfd.h"
- #include "sysdep.h"
- #include "libbfd.h"
- #include "libaout.h" /* BFD a.out internal data structures */
-
- #include <stdio.h>
- #include <sys/types.h>
- #include <sys/param.h>
- #include <sys/dir.h>
- #include <signal.h>
- #include <machine/reg.h>
-
- #include <sys/user.h> /* After a.out.h */
- #include <sys/file.h>
-
- #include <errno.h>
-
- struct trad_core_struct
- {
- asection *data_section;
- asection *stack_section;
- asection *reg_section;
-
- struct user u;
- } *rawptr;
-
-
- #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)
-
- /* Handle 4.2-style (and perhaps also sysV-style) core dump file. */
-
- /* ARGSUSED */
- bfd_target *
- trad_unix_core_file_p (abfd)
- bfd *abfd;
-
- {
- int val;
- struct user u;
- /* This struct is just for allocating two things with one zalloc, so
- they will be freed together, without violating alignment constraints. */
-
-
- val = bfd_read ((void *)&u, 1, sizeof u, abfd);
- if (val != sizeof u)
- return 0; /* Too small to be a core file */
-
- /* Sanity check perhaps??? */
- if (u.u_dsize > 0x1000000) /* Remember, it's in pages... */
- return 0;
- if (u.u_ssize > 0x1000000)
- return 0;
- /* Check that the size claimed is no greater than the file size. FIXME. */
-
- /* 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_zalloc (abfd, sizeof (struct trad_core_struct));
- if (rawptr == NULL) {
- bfd_error = no_memory;
- 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 *) zalloc (sizeof (asection));
- if (core_stacksec (abfd) == NULL) {
- loser:
- bfd_error = no_memory;
- free ((void *)rawptr);
- 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) {
- free ((void *)core_datasec (abfd));
- goto loser1;
- }
-
- 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_ALLOC + SEC_HAS_CONTENTS;
-
- core_datasec (abfd)->_raw_size = NBPG * u.u_dsize;
- 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
- core_stacksec (abfd)->vma = HOST_STACK_END_ADDR - (NBPG * u.u_ssize);
- /* 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 - (int) 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 */
-
- /* 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;
- {
- return -1; /* FIXME, where is it? */
- }
-
- /* 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 */
- }
-
- /* No archive file support via this BFD */
- #define trad_unix_openr_next_archived_file bfd_generic_openr_next_archived_file
- #define trad_unix_generic_stat_arch_elt bfd_generic_stat_arch_elt
- #define trad_unix_slurp_armap bfd_false
- #define trad_unix_slurp_extended_name_table bfd_true
- #define trad_unix_write_armap (PROTO (boolean, (*), \
- (bfd *arch, unsigned int elength, struct orl *map, \
- unsigned int orl_count, int stridx))) bfd_false
- #define trad_unix_truncate_arname bfd_dont_truncate_arname
- #define aout_32_openr_next_archived_file bfd_generic_openr_next_archived_file
-
- #define trad_unix_close_and_cleanup bfd_generic_close_and_cleanup
- #define trad_unix_set_section_contents (PROTO(boolean, (*), \
- (bfd *abfd, asection *section, PTR data, file_ptr offset, \
- bfd_size_type count))) bfd_false
- #define trad_unix_get_section_contents bfd_generic_get_section_contents
- #define trad_unix_new_section_hook (PROTO (boolean, (*), \
- (bfd *, sec_ptr))) bfd_true
- #define trad_unix_get_symtab_upper_bound bfd_0u
- #define trad_unix_get_symtab (PROTO (unsigned int, (*), \
- (bfd *, struct symbol_cache_entry **))) bfd_0u
- #define trad_unix_get_reloc_upper_bound (PROTO (unsigned int, (*), \
- (bfd *, sec_ptr))) bfd_0u
- #define trad_unix_canonicalize_reloc (PROTO (unsigned int, (*), \
- (bfd *, sec_ptr, arelent **, struct symbol_cache_entry**))) bfd_0u
- #define trad_unix_make_empty_symbol (PROTO ( \
- struct symbol_cache_entry *, (*), (bfd *))) bfd_false
- #define trad_unix_print_symbol (PROTO (void, (*), \
- (bfd *, PTR, struct symbol_cache_entry *, \
- bfd_print_symbol_type))) bfd_false
- #define trad_unix_get_lineno (PROTO (alent *, (*), \
- (bfd *, struct symbol_cache_entry *))) bfd_nullvoidptr
- #define trad_unix_set_arch_mach (PROTO (boolean, (*), \
- (bfd *, enum bfd_architecture, unsigned long))) bfd_false
- #define trad_unix_find_nearest_line (PROTO (boolean, (*), \
- (bfd *abfd, struct sec *section, \
- struct symbol_cache_entry **symbols,bfd_vma offset, \
- CONST char **file, CONST char **func, unsigned int *line))) bfd_false
- #define trad_unix_sizeof_headers (PROTO (int, (*), \
- (bfd *, boolean))) bfd_0
-
- #define trad_unix_bfd_debug_info_start bfd_void
- #define trad_unix_bfd_debug_info_end bfd_void
- #define trad_unix_bfd_debug_info_accumulate (PROTO (void, (*), \
- (bfd *, struct sec *))) bfd_void
- #define trad_unix_bfd_get_relocated_section_contents bfd_generic_get_relocated_section_contents
- #define trad_unix_bfd_relax_section bfd_generic_relax_section
- /* If somebody calls any byte-swapping routines, shoot them. */
- void
- swap_abort()
- {
- abort(); /* This way doesn't require any declaration for ANSI to fuck up */
- }
- #define NO_GET ((PROTO(bfd_vma, (*), ( bfd_byte *))) swap_abort )
- #define NO_PUT ((PROTO(void, (*), (bfd_vma, bfd_byte *))) swap_abort )
-
- bfd_target trad_core_vec =
- {
- "trad-core",
- bfd_target_unknown_flavour,
- true, /* target byte order */
- true, /* target headers byte order */
- (HAS_RELOC | EXEC_P | /* object flags */
- HAS_LINENO | HAS_DEBUG |
- HAS_SYMS | HAS_LOCALS | DYNAMIC | WP_TEXT | D_PAGED),
- (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
- ' ', /* ar_pad_char */
- 16, /* ar_max_namelen */
- 3, /* minimum alignment power */
- NO_GET, NO_PUT, NO_GET, NO_PUT, NO_GET, NO_PUT, /* data */
- NO_GET, NO_PUT, NO_GET, NO_PUT, NO_GET, NO_PUT, /* hdrs */
-
- {_bfd_dummy_target, _bfd_dummy_target,
- _bfd_dummy_target, trad_unix_core_file_p},
- {bfd_false, bfd_false, /* bfd_create_object */
- bfd_false, bfd_false},
- {bfd_false, bfd_false, /* bfd_write_contents */
- bfd_false, bfd_false},
-
- JUMP_TABLE(trad_unix)
- };
-