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- /* BFD backend for local host's a.out binaries
- Copyright (C) 1990-1991 Free Software Foundation, Inc.
- Written by Cygnus Support. Probably John Gilmore's fault.
-
- 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. */
-
- #include <ansidecl.h>
- #include <sysdep.h>
- #include "bfd.h"
- #include "libbfd.h"
-
- #include <a.out.h>
- #include "libaout.h" /* BFD a.out internal data structures */
-
- #include "trad-core.h" /* Traditional Unix core files */
-
- /*======== This next section is stolen from ../include/a.out.gnu.h
- ======== for all the losing Unix systems that don't provide these
- ======== macros.
-
- When porting to a new system, you must supply:
-
- HOST_PAGE_SIZE
- HOST_SEGMENT_SIZE
- HOST_MACHINE_ARCH (optional)
- HOST_MACHINE_MACHINE (optional)
- HOST_TEXT_START_ADDR
- HOST_STACK_END_ADDR
-
- in the ../include/h-systemname.h file. */
-
- #define PAGE_SIZE HOST_PAGE_SIZE
- #define SEGMENT_SIZE HOST_SEGMENT_SIZE
- #define TEXT_START_ADDR HOST_TEXT_START_ADDR
- #define STACK_END_ADDR HOST_STACK_END_ADDR
-
- /*======== Stolen section begins below. =================================*/
-
- #define a_info a_magic /* Old traditional Unix */
-
- #define N_MAGIC(exec) ((exec).a_info & 0xffff)
- #define N_SET_MAGIC(exec, magic) \
- ((exec).a_info = (((exec).a_info & 0xffff0000) | ((magic) & 0xffff)))
-
- /* Virtual Address of text segment from the a.out file. For OMAGIC,
- (almost always "unlinked .o's" these days), should be zero.
- For linked files, should reflect reality if we know it. */
-
- #ifndef N_TXTADDR
- #define N_TXTADDR(x) (N_MAGIC(x)==OMAGIC? 0 : TEXT_START_ADDR)
- #endif
-
- #ifndef N_BADMAG
- #define N_BADMAG(x) (N_MAGIC(x) != OMAGIC \
- && N_MAGIC(x) != NMAGIC \
- && N_MAGIC(x) != ZMAGIC)
- #endif
-
- /* This complexity is for encapsulated COFF support */
- #ifndef _N_HDROFF
- #define _N_HDROFF(x) (SEGMENT_SIZE - sizeof (struct exec))
- #endif
-
- #ifndef N_TXTOFF
- #define N_TXTOFF(x) (N_MAGIC(x) == ZMAGIC ? \
- _N_HDROFF((x)) + sizeof (struct exec) : \
- sizeof (struct exec))
- #endif
-
-
- #ifndef N_DATOFF
- #define N_DATOFF(x) ( N_TXTOFF(x) + (x).a_text )
- #endif
-
- #ifndef N_TRELOFF
- #define N_TRELOFF(x) ( N_DATOFF(x) + (x).a_data )
- #endif
-
- #ifndef N_DRELOFF
- #define N_DRELOFF(x) ( N_TRELOFF(x) + (x).a_trsize )
- #endif
-
- #ifndef N_SYMOFF
- #define N_SYMOFF(x) ( N_DRELOFF(x) + (x).a_drsize )
- #endif
-
- #ifndef N_STROFF
- #define N_STROFF(x) ( N_SYMOFF(x) + (x).a_syms )
- #endif
-
- /* Address of text segment in memory after it is loaded. */
- #ifndef N_TXTADDR
- #define N_TXTADDR(x) 0
- #endif
-
- #ifndef N_DATADDR
- #define N_DATADDR(x) \
- (N_MAGIC(x)==OMAGIC? (N_TXTADDR(x)+(x).a_text) \
- : (SEGMENT_SIZE + ((N_TXTADDR(x)+(x).a_text-1) & ~(SEGMENT_SIZE-1))))
- #endif
-
- /* Address of bss segment in memory after it is loaded. */
- #define N_BSSADDR(x) (N_DATADDR(x) + (x).a_data)
-
-
- static bfd_target *NAME(host_aout,callback) ();
-
- /*SUPPRESS558*/
- /*SUPPRESS529*/
-
- bfd_target *
- DEFUN(NAME(host_aout,object_p), (abfd),
- bfd *abfd)
- {
- unsigned char magicbuf[4]; /* Raw bytes of magic number from file */
- unsigned long magic; /* Swapped magic number */
-
- bfd_error = system_call_error;
-
- if (bfd_read ((PTR)magicbuf, 1, sizeof (magicbuf), abfd) !=
- sizeof (magicbuf))
- return 0;
- magic = bfd_h_get_32 (abfd, magicbuf);
-
- if (N_BADMAG (*((struct exec *) &magic))) return 0;
-
- return NAME(aout,some_aout_object_p) (abfd, NAME(host_aout,callback));
- }
-
- /* Set parameters about this a.out file that are machine-dependent.
- This routine is called from NAME(some_aout_object_p) just before it returns.
- */
-
- static bfd_target *
- DEFUN(NAME(host_aout,callback), (abfd),
- bfd *abfd)
- {
- /* exec_hdr (abfd), a "struct internal_exec *", is just an abstraction,
- as far as the BFD a.out layer cares. We use it as a "struct exec *".
- This routine moves any data from the exec header,
- which is needed by the BFD code, out to places known to BFD. This
- allows the rest of the BFD code to not know or care about the structure
- of exec_hdr (abfd). */
- struct exec *execp = (struct exec *)exec_hdr (abfd);
-
- /* The virtual memory addresses of the sections */
- obj_datasec (abfd)->vma = N_DATADDR(*execp);
- obj_bsssec (abfd)->vma = N_BSSADDR(*execp);
- obj_textsec (abfd)->vma = N_TXTADDR(*execp);
-
- /* The file offsets of the sections */
- obj_textsec (abfd)->filepos = N_TXTOFF(*execp);
- obj_datasec (abfd)->filepos = N_DATOFF(*execp);
-
- /* The file offsets of the relocation info */
- obj_textsec (abfd)->rel_filepos = N_TRELOFF(*execp);
- obj_datasec (abfd)->rel_filepos = N_DRELOFF(*execp);
-
- /* The file offsets of the string table and symbol table. */
- obj_str_filepos (abfd) = N_STROFF (*execp);
- obj_sym_filepos (abfd) = N_SYMOFF (*execp);
-
- #ifdef HOST_MACHINE_ARCH
- abfd->obj_arch = HOST_MACHINE_ARCH;
- #endif
- #ifdef HOST_MACHINE_MACHINE
- abfd->obj_machine = HOST_MACHINE_MACHINE;
- #endif
-
- obj_reloc_entry_size (abfd) = sizeof (struct relocation_info);
- return abfd->xvec;
- }
-
-
- boolean
- DEFUN(NAME(host_aout,mkobject), (abfd),
- bfd *abfd)
- {
- /* This struct is just for allocating two things with one zalloc, so
- they will be freed together, without violating alignment constraints. */
- struct aout_exec {
- struct aoutdata aoutdata;
- struct exec exec;
- } *rawptr;
-
- bfd_error = system_call_error;
-
- /* Use an intermediate variable for clarity */
- rawptr = (struct aout_exec *)bfd_zalloc (abfd, sizeof (struct aout_exec));
-
- if (rawptr == NULL) {
- bfd_error = no_memory;
- return false;
- }
-
- set_tdata (abfd, &rawptr->aoutdata);
- /* exec_hdr (abfd), a "struct internal_exec *", is just an abstraction,
- as far as the BFD a.out layer cares. We use it as a "struct exec *". */
- exec_hdr (abfd) = (struct internal_exec *) &rawptr->exec;
-
- /* For simplicity's sake we just make all the sections right here. */
-
- obj_textsec (abfd) = (asection *)NULL;
- obj_datasec (abfd) = (asection *)NULL;
- obj_bsssec (abfd) = (asection *)NULL;
- bfd_make_section (abfd, ".text");
- bfd_make_section (abfd, ".data");
- bfd_make_section (abfd, ".bss");
-
- return true;
- }
-
- /* Write an object file in host a.out format.
- Section contents have already been written. We write the
- file header, symbols, and relocation. */
-
- boolean
- DEFUN(NAME(host_aout,write_object_contents), (abfd),
- bfd *abfd)
- {
- /* This works because we are on the host system */
- #define EXEC_BYTES_SIZE (sizeof (struct exec))
- #define EXTERNAL_LIST_SIZE (sizeof (struct nlist))
- size_t data_pad = 0;
- unsigned char exec_bytes[EXEC_BYTES_SIZE];
- struct exec *execp = (struct exec *)exec_hdr (abfd);
-
- execp->a_text = obj_textsec (abfd)->size;
-
- WRITE_HEADERS (abfd, execp);
- return true;
- }
-
- /* We use BFD generic archive files. */
- #define aout_32_openr_next_archived_file bfd_generic_openr_next_archived_file
- #define aout_32_generic_stat_arch_elt bfd_generic_stat_arch_elt
- #define aout_32_slurp_armap bfd_slurp_bsd_armap
- #define aout_32_slurp_extended_name_table bfd_true
- #define aout_32_write_armap bsd_write_armap
- #define aout_32_truncate_arname bfd_bsd_truncate_arname
- /* #define aout_32_machine_type sunos_machine_type */
-
- /* Traditional Unix core files with upage */
- #define aout_32_core_file_failing_command trad_unix_core_file_failing_command
- #define aout_32_core_file_failing_signal trad_unix_core_file_failing_signal
- #define aout_32_core_file_matches_executable_p trad_unix_core_file_matches_executable_p
-
-
- #define aout_64_openr_next_archived_file bfd_generic_openr_next_archived_file
- #define aout_64_generic_stat_arch_elt bfd_generic_stat_arch_elt
- #define aout_64_slurp_armap bfd_slurp_bsd_armap
- #define aout_64_slurp_extended_name_table bfd_true
- #define aout_64_write_armap bsd_write_armap
- #define aout_64_truncate_arname bfd_bsd_truncate_arname
- /* #define aout_64_machine_type sunos_machine_type */
-
- #define aout_64_core_file_failing_command trad_unix_core_file_failing_command
- #define aout_64_core_file_failing_signal trad_unix_core_file_failing_signal
- #define aout_64_core_file_matches_executable_p trad_unix_core_file_matches_executable_p
-
- #define aout_64_bfd_debug_info_start bfd_void
- #define aout_64_bfd_debug_info_end bfd_void
- #define aout_64_bfd_debug_info_accumulate bfd_void
-
- #define aout_32_bfd_debug_info_start bfd_void
- #define aout_32_bfd_debug_info_end bfd_void
- #define aout_32_bfd_debug_info_accumulate (PROTO(void,(*),(bfd*, struct sec *))) bfd_void
-
-
- /* We implement these routines ourselves, rather than using the generic
- a.out versions. */
- #define aout_write_object_contents host_write_object_contents
-
- bfd_target host_aout_big_vec =
- {
- "a.out-host-big",
- bfd_target_aout_flavour_enum,
- 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 */
- _do_getb64, _do_putb64, _do_getb32, _do_putb32, _do_getb16, _do_putb16, /* data */
- _do_getb64, _do_putb64, _do_getb32, _do_putb32, _do_getb16, _do_putb16, /* hdrs */
-
- {_bfd_dummy_target, NAME(host_aout,object_p),
- bfd_generic_archive_p, trad_unix_core_file_p},
- {bfd_false, NAME(host_aout,mkobject),
- _bfd_generic_mkarchive, bfd_false},
- {bfd_false, NAME(host_aout,write_object_contents), /* bfd_write_contents */
- _bfd_write_archive_contents, bfd_false},
-
- JUMP_TABLE(JNAME(aout))
- };
-
- bfd_target host_aout_little_vec =
- {
- "a.out-host-little",
- bfd_target_aout_flavour_enum,
- false, /* target byte order */
- false, /* 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 */
- _do_getb64, _do_putb64, _do_getb32, _do_putb32, _do_getb16, _do_putb16, /* data */
- _do_getb64, _do_putb64, _do_getb32, _do_putb32, _do_getb16, _do_putb16, /* hdrs */
-
- {_bfd_dummy_target, NAME(host_aout,object_p),
- bfd_generic_archive_p, trad_unix_core_file_p},
- {bfd_false, NAME(host_aout,mkobject),
- _bfd_generic_mkarchive, bfd_false},
- {bfd_false, NAME(host_aout,write_object_contents), /* bfd_write_contents */
- _bfd_write_archive_contents, bfd_false},
-
- JUMP_TABLE(JNAME(aout))
- };
-