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binutils-gdb/bfd/aoutx.h
John Gilmore fb3be09b66 Lint (saber actually).
1991-09-26 22:28:46 +00:00

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/* BFD semi-generic back-end for a.out binaries
Copyright (C) 1990-1991 Free Software Foundation, Inc.
Written by 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. */
/*doc*
@section a.out backends
BFD supports a number of different flavours of a.out format, though
the major differences are only the sizes of the structures on disk,
and the shape of the relocation information.
The support is split into a basic support file @code{aoutx.h} and
other files which derive functions from the base. One derivation file
is @code{aoutf1.h} (for a.out flavour 1), and adds to the basic a.out
functions support for sun3, sun4, 386 and 29k a.out files, to create a
target jump vector for a specific target.
This information is further split out into more specific files for each
machine, including @code{sunos.c} - for sun3 and sun4 and
@code{demo64} for a demonstration of a 64 bit a.out format.
The base file @code{aoutx.h} defines general mechanisms for reading
and writing records to and from disk, and various other methods which
BFD requires. It is included by @code{aout32.c} and @code{aout64.c} to
form the names aout_32_swap_exec_header_in,
aout_64_swap_exec_header_in, etc.
As an example, this is what goes on to make the back end for a sun4, from aout32.c
@example
#define ARCH_SIZE 32
#include "aoutx.h"
@end example
Which exports names:
@example
...
aout_32_canonicalize_reloc
aout_32_find_nearest_line
aout_32_get_lineno
aout_32_get_reloc_upper_bound
...
@end example
from sunos.c
@example
#define ARCH 32
#define TARGET_NAME "a.out-sunos-big"
#define VECNAME sunos_big_vec
#include "aoutf1.h"
@end example
requires all the names from aout32.c, and produces the jump vector
@example
sunos_big_vec
@end example
The file host-aout.c is a special case. It is for a large set of hosts
that use ``more or less standard'' a.out files, and for which cross-debugging
is not interesting. It uses the standard 32-bit a.out support routines,
but determines the file offsets and addresses of the text, data,
and BSS sections, the machine architecture and machine type,
and the entry point address, in a host-dependent manner. Once these
values have been determined, generic code is used to handle the
object file.
When porting it to run on 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 file ../include/sys/h-XXX.h (for your host). These values, plus
the structures and macros defined in <a.out.h> on your host system, will
produce a BFD target that will access ordinary a.out files on your host.
To configure a new machine to use host-aout.c, specify:
TDEFINES = -DDEFAULT_VECTOR=host_aout_big_vec
TDEPFILES= host-aout.o trad-core.o
in the config/t-XXX file, and modify configure.in to use the
t-XXX file (by setting "bfd_target=XXX") when your configuration is
selected.
*/
#define KEEPIT flags
#define KEEPITTYPE int
#include "bfd.h"
#include <sysdep.h>
#include <ansidecl.h>
#include "libaout.h"
#include "libbfd.h"
#include "aout64.h"
#include "stab.gnu.h"
#include "ar.h"
void (*bfd_error_trap)();
/*doc*
@subsection relocations
The file @code{aoutx.h} caters for both the @emph{standard} and
@emph{extended} forms of a.out relocation records.
The standard records are characterised by containing only an address,
a symbol index and a type field. The extended records (used on 29ks
and sparcs) also have a full integer for an addend.
*/
#define CTOR_TABLE_RELOC_IDX 2
/* start-sanitize-v9 */
/* Provided the symbol, returns the value reffed */
static bfd_vma
DEFUN(get_symbol_value,(symbol, input_section),
asymbol *symbol AND
asection *input_section)
{
bfd_vma relocation = 0;
if (symbol != (asymbol *)NULL) {
if (symbol->flags & BSF_FORT_COMM) {
relocation = 0;
} else {
relocation = symbol->value;
}
if (symbol->section != (asection *)NULL) {
relocation += symbol->section->output_section->vma +
symbol->section->output_offset;
}
}
else {
/* No symbol, so use the input section value */
relocation = input_section->output_section->vma + input_section->output_offset;
}
return relocation;
}
static bfd_reloc_status_enum_type
DEFUN(reloc64,(abfd, reloc_entry, symbol_in, data, input_section),
bfd *abfd AND
arelent *reloc_entry AND
asymbol *symbol_in AND
unsigned char *data AND
asection *input_section)
{
bfd_vma sym_value = get_symbol_value(symbol_in, input_section);
bfd_vma value = bfd_get_64(abfd, (bfd_byte *)data + reloc_entry->address);
value += sym_value + reloc_entry->addend;
bfd_put_64(abfd, value, (bfd_byte *)data+reloc_entry->address);
return bfd_reloc_ok;
}
static bfd_reloc_status_enum_type
DEFUN(disp64,(abfd, reloc_entry, symbol_in, data, input_section),
bfd *abfd AND
arelent *reloc_entry AND
asymbol *symbol_in AND
unsigned char *data AND
asection *input_section)
{
bfd_vma sym_value = get_symbol_value(symbol_in, input_section);
/* bfd_get_64(abfd, (bfd_byte *)data + reloc_entry->address);*/
bfd_vma value = 0;
value += sym_value + reloc_entry->addend;
/* Subtract from the calculated value the pc */
value -= reloc_entry->address + input_section->output_section->vma;
bfd_put_64(abfd, value, (bfd_byte *)data+reloc_entry->address);
return bfd_reloc_ok;
}
/* High 22 bits of high half of a 64-bit value, in the low bits of the
target address. If we only have 32-bit values, this is always zeroes. */
static bfd_reloc_status_enum_type
DEFUN(hhi22,(abfd, reloc_entry, symbol_in, data, input_section),
bfd *abfd AND
arelent *reloc_entry AND
asymbol *symbol_in AND
unsigned char *data AND
asection *input_section)
{
bfd_vma sym_value = get_symbol_value(symbol_in, input_section);
bfd_vma value = bfd_get_32(abfd, (bfd_byte *)data + reloc_entry->address);
value &= ~0x3fffff;
value |= 0x3fffff & (((sym_value + reloc_entry->addend) >> 31) >> 11);
/* C does not define what happens if we shift it by >32 bits on a 32-bit
machine, but a shift of 31 and then 11 is well defined to give zero. */
bfd_put_32(abfd, value, (bfd_byte *)data+reloc_entry->address);
return bfd_reloc_ok;
}
/* Low 10 bits of high half of a 64-bit value, in the low bits of the
target address. If we only have 32-bit values, this is always zeroes. */
static bfd_reloc_status_enum_type
DEFUN(hlo10,(abfd, reloc_entry, symbol_in, data, input_section),
bfd *abfd AND
arelent *reloc_entry AND
asymbol *symbol_in AND
unsigned char *data AND
asection *input_section)
{
bfd_vma sym_value = get_symbol_value(symbol_in, input_section);
bfd_vma value = bfd_get_32(abfd, (bfd_byte *)data + reloc_entry->address);
value &= ~0x3ff;
value |= 0x3ff & (((sym_value + reloc_entry->addend) >> 31) >> 1);
/* C does not define what happens if we shift it by >32 bits on a 32-bit
machine, but a shift of 31 and then 1 is well defined to give zero. */
bfd_put_32(abfd, value, (bfd_byte *)data+reloc_entry->address);
return bfd_reloc_ok;
}
static bfd_reloc_status_enum_type
r64()
{
abort();
return bfd_reloc_notsupported;
}
/* end-sanitize-v9 */
static reloc_howto_type howto_table_ext[] =
{
HOWTO(RELOC_8, 0, 0, 8, false, 0, true, true,0,"8", false, 0,0x000000ff, false),
HOWTO(RELOC_16, 0, 1, 16, false, 0, true, true,0,"16", false, 0,0x0000ffff, false),
HOWTO(RELOC_32, 0, 2, 32, false, 0, true, true,0,"32", false, 0,0xffffffff, false),
HOWTO(RELOC_DISP8, 0, 0, 8, true, 0, false, true,0,"DISP8", false, 0,0x000000ff, false),
HOWTO(RELOC_DISP16, 0, 1, 16, true, 0, false, true,0,"DISP16", false, 0,0x0000ffff, false),
HOWTO(RELOC_DISP32, 0, 2, 32, true, 0, false, true,0,"DISP32", false, 0,0xffffffff, false),
HOWTO(RELOC_WDISP30,2, 2, 30, true, 0, false, true,0,"WDISP30", false, 0,0x3fffffff, false),
HOWTO(RELOC_WDISP22,2, 2, 22, true, 0, false, true,0,"WDISP22", false, 0,0x003fffff, false),
HOWTO(RELOC_HI22, 10, 2, 22, false, 0, false, true,0,"HI22", false, 0,0x003fffff, false),
HOWTO(RELOC_22, 0, 2, 22, false, 0, false, true,0,"22", false, 0,0x003fffff, false),
HOWTO(RELOC_13, 0, 2, 13, false, 0, false, true,0,"13", false, 0,0x00001fff, false),
HOWTO(RELOC_LO10, 0, 2, 10, false, 0, false, true,0,"LO10", false, 0,0x000003ff, false),
HOWTO(RELOC_SFA_BASE,0, 2, 32, false, 0, false, true,0,"SFA_BASE", false, 0,0xffffffff, false),
HOWTO(RELOC_SFA_OFF13,0,2, 32, false, 0, false, true,0,"SFA_OFF13",false, 0,0xffffffff, false),
HOWTO(RELOC_BASE10, 0, 2, 16, false, 0, false, true,0,"BASE10", false, 0,0x0000ffff, false),
HOWTO(RELOC_BASE13, 0, 2, 13, false, 0, false, true,0,"BASE13", false, 0,0x00001fff, false),
HOWTO(RELOC_BASE22, 0, 2, 0, false, 0, false, true,0,"BASE22", false, 0,0x00000000, false),
HOWTO(RELOC_PC10, 0, 2, 10, false, 0, false, true,0,"PC10", false, 0,0x000003ff, false),
HOWTO(RELOC_PC22, 0, 2, 22, false, 0, false, true,0,"PC22", false, 0,0x003fffff, false),
HOWTO(RELOC_JMP_TBL,0, 2, 32, false, 0, false, true,0,"JMP_TBL", false, 0,0xffffffff, false),
HOWTO(RELOC_SEGOFF16,0, 2, 0, false, 0, false, true,0,"SEGOFF16", false, 0,0x00000000, false),
HOWTO(RELOC_GLOB_DAT,0, 2, 0, false, 0, false, true,0,"GLOB_DAT", false, 0,0x00000000, false),
HOWTO(RELOC_JMP_SLOT,0, 2, 0, false, 0, false, true,0,"JMP_SLOT", false, 0,0x00000000, false),
HOWTO(RELOC_RELATIVE,0, 2, 0, false, 0, false, true,0,"RELATIVE", false, 0,0x00000000, false),
/* start-sanitize-v9 */
HOWTO(RELOC_11, 0, 2, 21, true, 0, false, true,r64,"11", false, 0,/*0x00000000001fffff*/0, false),
HOWTO(RELOC_WDISP2_14, 0, 2, 21, true, 0, false, true,r64,"DISP2_14",false, 0,/*0x00000000001fffff*/0, false),
HOWTO(RELOC_WDISP19, 0, 3, 64, true, 0, false, true,r64,"DISP19", false, 0,/*0xffffffffffffffff*/0, false),
HOWTO(RELOC_HHI22, 42, 3, 22, false, 0, false, true,hhi22,"HHI22",false, 0,/*0x003fffff00000000*/0, false),
HOWTO(RELOC_HLO10, 32, 3, 10, false, 0, false, true,hlo10,"HLO10", false, 0,/*0x000003ff00000000*/0, false),
HOWTO(RELOC_JUMPTARG,2, 13, 16, true, 0, false, true,0,"JUMPTARG", false, 0,0x0000ffff, false),
HOWTO(RELOC_CONST, 0, 13, 16, false, 0, false, true,0,"CONST", false, 0,0x0000ffff, false),
HOWTO(RELOC_CONSTH, 16, 13, 16, false, 0, false, true,0,"CONSTH", false, 0,0x0000ffff, false),
HOWTO(RELOC_64, 0, 3, 64, false, 0, true, true,reloc64,"64", false, 0,/*0xffffffffffffffff*/0, false),
HOWTO(RELOC_DISP64, 0, 3, 64, true, 0, false, true,disp64,"DISP64", false, 0,/*0xffffffffffffffff*/0, false),
HOWTO(RELOC_WDISP21,2, 2, 21, true, 0, false, true,r64,"WDISP21",false, 0,/*0x00000000001fffff*/0, false),
HOWTO(RELOC_DISP21, 0, 2, 21, true, 0, false, true,r64,"DISP21", false, 0,/*0x00000000001fffff*/0, false),
HOWTO(RELOC_DISP14, 0, 2, 14, true, 0, false, true,r64,"DISP21", false, 0,/*0x0000000000003fff*/0, false),
/* end-sanitize-v9 */
};
/* Convert standard reloc records to "arelent" format (incl byte swap). */
static reloc_howto_type howto_table_std[] = {
/* type rs size bsz pcrel bitpos abs ovrf sf name part_inpl readmask setmask pcdone */
HOWTO( 0, 0, 0, 8, false, 0, true, true,0,"8", true, 0x000000ff,0x000000ff, false),
HOWTO( 1, 0, 1, 16, false, 0, true, true,0,"16", true, 0x0000ffff,0x0000ffff, false),
HOWTO( 2, 0, 2, 32, false, 0, true, true,0,"32", true, 0xffffffff,0xffffffff, false),
HOWTO( 3, 0, 3, 64, false, 0, true, true,0,"64", true, 0xdeaddead,0xdeaddead, false),
HOWTO( 4, 0, 0, 8, true, 0, false, true,0,"DISP8", true, 0x000000ff,0x000000ff, false),
HOWTO( 5, 0, 1, 16, true, 0, false, true,0,"DISP16", true, 0x0000ffff,0x0000ffff, false),
HOWTO( 6, 0, 2, 32, true, 0, false, true,0,"DISP32", true, 0xffffffff,0xffffffff, false),
HOWTO( 7, 0, 3, 64, true, 0, false, true,0,"DISP64", true, 0xfeedface,0xfeedface, false),
};
bfd_error_vector_type bfd_error_vector;
/*doc*
@subsection Internal Entry Points
@code{aoutx.h} exports several routines for accessing the contents of
an a.out file, which are gathered and exported in turn by various
format specific files (eg sunos.c).
*/
/*doc*
*i aout_<size>_swap_exec_header_in
Swaps the information in an executable header taken from a raw byte stream memory image,
into the internal exec_header structure.
*; PROTO(void, aout_<size>_swap_exec_header_in,
(bfd *abfd,
struct external_exec *raw_bytes,
struct internal_exec *execp));
*/
void
DEFUN(NAME(aout,swap_exec_header_in),(abfd, raw_bytes, execp),
bfd *abfd AND
struct external_exec *raw_bytes AND
struct internal_exec *execp)
{
struct external_exec *bytes = (struct external_exec *)raw_bytes;
/* Now fill in fields in the execp, from the bytes in the raw data. */
execp->a_info = bfd_h_get_32 (abfd, bytes->e_info);
execp->a_text = GET_WORD (abfd, bytes->e_text);
execp->a_data = GET_WORD (abfd, bytes->e_data);
execp->a_bss = GET_WORD (abfd, bytes->e_bss);
execp->a_syms = GET_WORD (abfd, bytes->e_syms);
execp->a_entry = GET_WORD (abfd, bytes->e_entry);
execp->a_trsize = GET_WORD (abfd, bytes->e_trsize);
execp->a_drsize = GET_WORD (abfd, bytes->e_drsize);
}
/*doc*
*i aout_<size>_swap_exec_header_out
Swaps the information in an internal exec header structure into the
supplied buffer ready for writing to disk.
*; PROTO(void, aout_<size>_swap_exec_header_out,
(bfd *abfd,
struct internal_exec *execp,
struct external_exec *raw_bytes));
*/
void
DEFUN(NAME(aout,swap_exec_header_out),(abfd, execp, raw_bytes),
bfd *abfd AND
struct internal_exec *execp AND
struct external_exec *raw_bytes)
{
struct external_exec *bytes = (struct external_exec *)raw_bytes;
/* Now fill in fields in the raw data, from the fields in the exec struct. */
bfd_h_put_32 (abfd, execp->a_info , bytes->e_info);
PUT_WORD (abfd, execp->a_text , bytes->e_text);
PUT_WORD (abfd, execp->a_data , bytes->e_data);
PUT_WORD (abfd, execp->a_bss , bytes->e_bss);
PUT_WORD (abfd, execp->a_syms , bytes->e_syms);
PUT_WORD (abfd, execp->a_entry , bytes->e_entry);
PUT_WORD (abfd, execp->a_trsize, bytes->e_trsize);
PUT_WORD (abfd, execp->a_drsize, bytes->e_drsize);
}
struct container {
struct aoutdata a;
struct internal_exec e;
};
/*doc*
*i aout_<size>_some_aout_object_p
Some A.OUT variant thinks that the file whose format we're checking
is an a.out file. Do some more checking, and set up for access if
it really is. Call back to the calling environments "finish up"
function just before returning, to handle any last-minute setup.
*; PROTO(bfd_target *, aout_<size>_some_aout_object_p,
(bfd *abfd,
bfd_target *(*callback_to_real_object_p)()));
*/
bfd_target *
DEFUN(NAME(aout,some_aout_object_p),(abfd, callback_to_real_object_p),
bfd *abfd AND
bfd_target *(*callback_to_real_object_p) ())
{
struct external_exec exec_bytes;
struct internal_exec *execp;
struct container *rawptr;
if (bfd_seek (abfd, 0L, false) < 0) {
bfd_error = system_call_error;
return 0;
}
if (bfd_read ((PTR) &exec_bytes, 1, EXEC_BYTES_SIZE, abfd)
!= EXEC_BYTES_SIZE) {
bfd_error = wrong_format;
return 0;
}
/* Use an intermediate variable for clarity */
rawptr = (struct container *) bfd_zalloc (abfd, sizeof (struct container));
if (rawptr == NULL) {
bfd_error = no_memory;
return 0;
}
set_tdata (abfd, rawptr);
exec_hdr (abfd) = execp = &(rawptr->e);
NAME(aout,swap_exec_header_in)(abfd, &exec_bytes, execp);
/* Set the file flags */
abfd->flags = NO_FLAGS;
if (execp->a_drsize || execp->a_trsize)
abfd->flags |= HAS_RELOC;
if (execp->a_entry)
abfd->flags |= EXEC_P;
if (execp->a_syms)
abfd->flags |= HAS_LINENO | HAS_DEBUG | HAS_SYMS | HAS_LOCALS;
if (N_MAGIC (*execp) == ZMAGIC) abfd->flags |= D_PAGED;
if (N_MAGIC (*execp) == NMAGIC) abfd->flags |= WP_TEXT;
bfd_get_start_address (abfd) = execp->a_entry;
obj_aout_symbols (abfd) = (aout_symbol_type *)NULL;
bfd_get_symcount (abfd) = execp->a_syms / sizeof (struct external_nlist);
/* Set the default architecture and machine type. These can be
overridden in the callback routine. */
abfd->obj_arch = bfd_arch_unknown;
abfd->obj_machine = 0;
/* The default relocation entry size is that of traditional V7 Unix. */
obj_reloc_entry_size (abfd) = RELOC_STD_SIZE;
/* create the sections. This is raunchy, but bfd_close wants to reclaim
them */
obj_textsec (abfd) = (asection *)NULL;
obj_datasec (abfd) = (asection *)NULL;
obj_bsssec (abfd) = (asection *)NULL;
(void)bfd_make_section(abfd, ".text");
(void)bfd_make_section(abfd, ".data");
(void)bfd_make_section(abfd, ".bss");
abfd->sections = obj_textsec (abfd);
obj_textsec (abfd)->next = obj_datasec (abfd);
obj_datasec (abfd)->next = obj_bsssec (abfd);
obj_datasec (abfd)->size = execp->a_data;
obj_bsssec (abfd)->size = execp->a_bss;
obj_textsec (abfd)->size = execp->a_text;
if (abfd->flags & D_PAGED) {
obj_textsec (abfd)->size -= EXEC_BYTES_SIZE;
}
obj_textsec (abfd)->flags = (execp->a_trsize != 0 ?
(SEC_ALLOC | SEC_LOAD | SEC_RELOC | SEC_HAS_CONTENTS) :
(SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS));
obj_datasec (abfd)->flags = (execp->a_drsize != 0 ?
(SEC_ALLOC | SEC_LOAD | SEC_RELOC | SEC_HAS_CONTENTS) :
(SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS));
obj_bsssec (abfd)->flags = SEC_ALLOC;
#ifdef THIS_IS_ONLY_DOCUMENTATION
/* Call back to the format-dependent code to fill in the rest of the
fields and do any further cleanup. Things that should be filled
in by the callback: */
struct exec *execp = 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);
/* This common code can't fill in those things because they depend
on either the start address of the text segment, the rounding
up of virtual addersses between segments, or the starting file
position of the text segment -- all of which varies among different
versions of a.out. */
/* Determine the architecture and machine type of the object file. */
switch (N_MACHTYPE (*exec_hdr (abfd))) {
default:
abfd->obj_arch = bfd_arch_obscure;
break;
}
/* Determine the size of a relocation entry */
switch (abfd->obj_arch) {
case bfd_arch_sparc:
case bfd_arch_a29k:
obj_reloc_entry_size (abfd) = RELOC_EXT_SIZE;
default:
obj_reloc_entry_size (abfd) = RELOC_STD_SIZE;
}
return abfd->xvec;
/* The architecture is encoded in various ways in various a.out variants,
or is not encoded at all in some of them. The relocation size depends
on the architecture and the a.out variant. Finally, the return value
is the bfd_target vector in use. If an error occurs, return zero and
set bfd_error to the appropriate error code.
Formats such as b.out, which have additional fields in the a.out
header, should cope with them in this callback as well. */
#endif /* DOCUMENTATION */
return (*callback_to_real_object_p)(abfd);
}
/*doc*
*i aout_<size>_mkobject
This routine initializes a BFD for use with a.out files.
*; PROTO(boolean, aout_<size>_mkobject, (bfd *));
*/
boolean
DEFUN(NAME(aout,mkobject),(abfd),
bfd *abfd)
{
struct container *rawptr;
bfd_error = system_call_error;
/* Use an intermediate variable for clarity */
rawptr = (struct container *)bfd_zalloc (abfd, sizeof (struct container));
if (rawptr == NULL) {
bfd_error = no_memory;
return false;
}
set_tdata (abfd, rawptr);
exec_hdr (abfd) = &(rawptr->e);
/* 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;
}
/*doc*
*i aout_<size>_machine_type
Keep track of machine architecture and machine type for a.out's.
Return the machine_type for a particular arch&machine, or M_UNKNOWN
if that exact arch&machine can't be represented in a.out format.
If the architecture is understood, machine type 0 (default) should
always be understood.
*; PROTO(enum machine_type, aout_<size>_machine_type,
(enum bfd_architecture arch,
unsigned long machine));
*/
enum machine_type
DEFUN(NAME(aout,machine_type),(arch, machine),
enum bfd_architecture arch AND
unsigned long machine)
{
enum machine_type arch_flags;
arch_flags = M_UNKNOWN;
switch (arch) {
case bfd_arch_sparc:
if (machine == 0) arch_flags = M_SPARC;
break;
case bfd_arch_m68k:
switch (machine) {
case 0: arch_flags = M_68010; break;
case 68000: arch_flags = M_UNKNOWN; break;
case 68010: arch_flags = M_68010; break;
case 68020: arch_flags = M_68020; break;
default: arch_flags = M_UNKNOWN; break;
}
break;
case bfd_arch_i386:
if (machine == 0) arch_flags = M_386;
break;
case bfd_arch_a29k:
if (machine == 0) arch_flags = M_29K;
break;
default:
arch_flags = M_UNKNOWN;
break;
}
return arch_flags;
}
/*doc*
*i aout_<size>_set_arch_mach
Sets the architecture and the machine of the BFD to those values
supplied. Verifies that the format can support the architecture
required.
*; PROTO(boolean, aout_<size>_set_arch_mach,
(bfd *,
enum bfd_architecture,
unsigned long machine));
*/
boolean
DEFUN(NAME(aout,set_arch_mach),(abfd, arch, machine),
bfd *abfd AND
enum bfd_architecture arch AND
unsigned long machine)
{
abfd->obj_arch = arch;
abfd->obj_machine = machine;
if (arch != bfd_arch_unknown &&
NAME(aout,machine_type) (arch, machine) == M_UNKNOWN)
return false; /* We can't represent this type */
return true; /* We're easy ... */
}
/*doc*
*i aout_<size>new_section_hook
Called by the BFD in response to a @code{bfd_make_section} request.
*; PROTO(boolean, aout_<size>_new_section_hook,
(bfd *abfd,
asection *newsect));
*/
boolean
DEFUN(NAME(aout,new_section_hook),(abfd, newsect),
bfd *abfd AND
asection *newsect)
{
/* align to double at least */
newsect->alignment_power = 3;
if (bfd_get_format (abfd) == bfd_object) {
if (obj_textsec(abfd) == NULL && !strcmp(newsect->name, ".text")) {
obj_textsec(abfd)= newsect;
return true;
}
if (obj_datasec(abfd) == NULL && !strcmp(newsect->name, ".data")) {
obj_datasec(abfd) = newsect;
return true;
}
if (obj_bsssec(abfd) == NULL && !strcmp(newsect->name, ".bss")) {
obj_bsssec(abfd) = newsect;
return true;
}
}
/* We allow more than three sections internally */
return true;
}
boolean
DEFUN(NAME(aout,set_section_contents),(abfd, section, location, offset, count),
bfd *abfd AND
sec_ptr section AND
PTR location AND
file_ptr offset AND
bfd_size_type count)
{
if (abfd->output_has_begun == false)
{ /* set by bfd.c handler */
switch (abfd->direction)
{
case read_direction:
case no_direction:
bfd_error = invalid_operation;
return false;
case both_direction:
break;
case write_direction:
if ((obj_textsec (abfd) == NULL) || (obj_datasec (abfd) == NULL))
{
bfd_error = invalid_operation;
return false;
}
/*if (abfd->flags & D_PAGED) {
obj_textsec(abfd)->filepos = 0;
}
else*/ {
obj_textsec(abfd)->filepos = EXEC_BYTES_SIZE;
}
obj_textsec(abfd)->size = align_power(obj_textsec(abfd)->size,
obj_textsec(abfd)->alignment_power);
obj_datasec(abfd)->filepos = obj_textsec (abfd)->size + EXEC_BYTES_SIZE;
obj_datasec(abfd)->size = align_power(obj_datasec(abfd)->size,
obj_datasec(abfd)->alignment_power);
}
}
/* regardless, once we know what we're doing, we might as well get going */
if (section != obj_bsssec(abfd))
{
bfd_seek (abfd, section->filepos + offset, SEEK_SET);
if (count) {
return (bfd_write ((PTR)location, 1, count, abfd) == count) ?
true : false;
}
return false;
}
return true;
}
/* Classify stabs symbols */
#define sym_in_text_section(sym) \
(((sym)->type & (N_ABS | N_TEXT | N_DATA | N_BSS))== N_TEXT)
#define sym_in_data_section(sym) \
(((sym)->type & (N_ABS | N_TEXT | N_DATA | N_BSS))== N_DATA)
#define sym_in_bss_section(sym) \
(((sym)->type & (N_ABS | N_TEXT | N_DATA | N_BSS))== N_BSS)
/* Symbol is undefined if type is N_UNDF|N_EXT and if it has
zero in the "value" field. Nonzeroes there are fortrancommon
symbols. */
#define sym_is_undefined(sym) \
((sym)->type == (N_UNDF | N_EXT) && (sym)->symbol.value == 0)
/* Symbol is a global definition if N_EXT is on and if it has
a nonzero type field. */
#define sym_is_global_defn(sym) \
(((sym)->type & N_EXT) && (sym)->type & N_TYPE)
/* Symbol is debugger info if any bits outside N_TYPE or N_EXT
are on. */
#define sym_is_debugger_info(sym) \
((sym)->type & ~(N_EXT | N_TYPE))
#define sym_is_fortrancommon(sym) \
(((sym)->type == (N_EXT)) && (sym)->symbol.value != 0)
/* Symbol is absolute if it has N_ABS set */
#define sym_is_absolute(sym) \
(((sym)->type & N_TYPE)== N_ABS)
#define sym_is_indirect(sym) \
(((sym)->type & N_ABS)== N_ABS)
/* Only in their own functions for ease of debugging; when sym flags have
stabilised these should be inlined into their (single) caller */
static void
DEFUN(translate_from_native_sym_flags,(sym_pointer, cache_ptr, abfd),
struct external_nlist *sym_pointer AND
aout_symbol_type *cache_ptr AND
bfd *abfd)
{
switch (cache_ptr->type & N_TYPE) {
case N_SETA:
case N_SETT:
case N_SETD:
case N_SETB:
{
char *copy = bfd_alloc(abfd, strlen(cache_ptr->symbol.name)+1);
asection *section ;
arelent_chain *reloc = (arelent_chain *)bfd_alloc(abfd, sizeof(arelent_chain));
strcpy(copy, cache_ptr->symbol.name);
section = bfd_make_section(abfd,copy);
switch ( (cache_ptr->type & N_TYPE) ) {
case N_SETA:
section->flags = SEC_CONSTRUCTOR;
reloc->relent.section = (asection *)NULL;
cache_ptr->symbol.section = (asection *)NULL;
break;
case N_SETT:
section->flags = SEC_CONSTRUCTOR_TEXT;
reloc->relent.section = (asection *)obj_textsec(abfd);
cache_ptr->symbol.value -= reloc->relent.section->vma;
break;
case N_SETD:
section->flags = SEC_CONSTRUCTOR_DATA;
reloc->relent.section = (asection *)obj_datasec(abfd);
cache_ptr->symbol.value -= reloc->relent.section->vma;
break;
case N_SETB:
section->flags = SEC_CONSTRUCTOR_BSS;
reloc->relent.section = (asection *)obj_bsssec(abfd);
cache_ptr->symbol.value -= reloc->relent.section->vma;
break;
}
cache_ptr->symbol.section = reloc->relent.section;
reloc->relent.addend = cache_ptr->symbol.value ;
/* We modify the symbol to belong to a section depending upon the
name of the symbol - probably __CTOR__ or __DTOR__ but we don't
really care, and add to the size of the section to contain a
pointer to the symbol. Build a reloc entry to relocate to this
symbol attached to this section. */
section->reloc_count++;
section->alignment_power = 2;
reloc->relent.sym_ptr_ptr = (asymbol **)NULL;
reloc->next = section->constructor_chain;
section->constructor_chain = reloc;
reloc->relent.address = section->size;
section->size += sizeof(int *);
reloc->relent.howto = howto_table_ext +CTOR_TABLE_RELOC_IDX;
cache_ptr->symbol.flags |= BSF_DEBUGGING | BSF_CONSTRUCTOR;
}
break;
default:
if (cache_ptr->type == N_WARNING)
{
/* This symbol is the text of a warning message, the next symbol
is the symbol to associate the warning with */
cache_ptr->symbol.flags = BSF_DEBUGGING | BSF_WARNING;
cache_ptr->symbol.value = (bfd_vma)((cache_ptr+1));
/* We furgle with the next symbol in place. We don't want it to be undefined, we'll trample the type */
(sym_pointer+1)->e_type[0] = 0xff;
break;
}
if ((cache_ptr->type | N_EXT) == (N_INDR | N_EXT)) {
/* Two symbols in a row for an INDR message. The first symbol
contains the name we will match, the second symbol contains the
name the first name is translated into. It is supplied to us
undefined. This is good, since we want to pull in any files which
define it */
cache_ptr->symbol.flags = BSF_DEBUGGING | BSF_INDIRECT;
cache_ptr->symbol.value = (bfd_vma)((cache_ptr+1));
break;
}
if (sym_is_debugger_info (cache_ptr)) {
cache_ptr->symbol.flags = BSF_DEBUGGING ;
/* Work out the section correct for this symbol */
switch (cache_ptr->type & N_TYPE)
{
case N_TEXT:
case N_FN:
cache_ptr->symbol.section = obj_textsec (abfd);
cache_ptr->symbol.value -= obj_textsec(abfd)->vma;
break;
case N_DATA:
cache_ptr->symbol.value -= obj_datasec(abfd)->vma;
cache_ptr->symbol.section = obj_datasec (abfd);
break;
case N_BSS :
cache_ptr->symbol.section = obj_bsssec (abfd);
cache_ptr->symbol.value -= obj_bsssec(abfd)->vma;
break;
case N_ABS:
default:
cache_ptr->symbol.section = 0;
break;
}
}
else {
if (sym_is_fortrancommon (cache_ptr))
{
cache_ptr->symbol.flags = BSF_FORT_COMM;
cache_ptr->symbol.section = (asection *)NULL;
}
else {
if (sym_is_undefined (cache_ptr)) {
cache_ptr->symbol.flags = BSF_UNDEFINED;
}
else if (sym_is_global_defn (cache_ptr)) {
cache_ptr->symbol.flags = BSF_GLOBAL | BSF_EXPORT;
}
else if (sym_is_absolute (cache_ptr)) {
cache_ptr->symbol.flags = BSF_ABSOLUTE;
}
else {
cache_ptr->symbol.flags = BSF_LOCAL;
}
/* In a.out, the value of a symbol is always relative to the
* start of the file, if this is a data symbol we'll subtract
* the size of the text section to get the section relative
* value. If this is a bss symbol (which would be strange)
* we'll subtract the size of the previous two sections
* to find the section relative address.
*/
if (sym_in_text_section (cache_ptr)) {
cache_ptr->symbol.value -= obj_textsec(abfd)->vma;
cache_ptr->symbol.section = obj_textsec (abfd);
}
else if (sym_in_data_section (cache_ptr)){
cache_ptr->symbol.value -= obj_datasec(abfd)->vma;
cache_ptr->symbol.section = obj_datasec (abfd);
}
else if (sym_in_bss_section(cache_ptr)) {
cache_ptr->symbol.section = obj_bsssec (abfd);
cache_ptr->symbol.value -= obj_bsssec(abfd)->vma;
}
else {
cache_ptr->symbol.section = (asection *)NULL;
cache_ptr->symbol.flags |= BSF_ABSOLUTE;
}
}
}
}
}
static void
DEFUN(translate_to_native_sym_flags,(sym_pointer, cache_ptr, abfd),
struct external_nlist *sym_pointer AND
asymbol *cache_ptr AND
bfd *abfd)
{
bfd_vma value = cache_ptr->value;
if (bfd_get_section(cache_ptr)) {
if (bfd_get_output_section(cache_ptr) == obj_bsssec (abfd)) {
sym_pointer->e_type[0] |= N_BSS;
}
else if (bfd_get_output_section(cache_ptr) == obj_datasec (abfd)) {
sym_pointer->e_type[0] |= N_DATA;
}
else if (bfd_get_output_section(cache_ptr) == obj_textsec (abfd)) {
sym_pointer->e_type[0] |= N_TEXT;
}
else {
bfd_error_vector.nonrepresentable_section(abfd,
bfd_get_output_section(cache_ptr)->name);
}
/* Turn the symbol from section relative to absolute again */
value +=
cache_ptr->section->output_section->vma
+ cache_ptr->section->output_offset ;
}
else {
sym_pointer->e_type[0] |= N_ABS;
}
if (cache_ptr->flags & (BSF_WARNING)) {
(sym_pointer+1)->e_type[0] = 1;
}
if (cache_ptr->flags & (BSF_FORT_COMM | BSF_UNDEFINED)) {
sym_pointer->e_type[0] = (N_UNDF | N_EXT);
}
else {
if (cache_ptr->flags & BSF_ABSOLUTE) {
sym_pointer->e_type[0] |= N_ABS;
}
if (cache_ptr->flags & (BSF_GLOBAL | BSF_EXPORT)) {
sym_pointer->e_type[0] |= N_EXT;
}
if (cache_ptr->flags & BSF_DEBUGGING) {
sym_pointer->e_type [0]= ((aout_symbol_type *)cache_ptr)->type;
}
}
PUT_WORD(abfd, value, sym_pointer->e_value);
}
/* Native-level interface to symbols. */
/* We read the symbols into a buffer, which is discarded when this
function exits. We read the strings into a buffer large enough to
hold them all plus all the cached symbol entries. */
asymbol *
DEFUN(NAME(aout,make_empty_symbol),(abfd),
bfd *abfd)
{
aout_symbol_type *new =
(aout_symbol_type *)bfd_zalloc (abfd, sizeof (aout_symbol_type));
new->symbol.the_bfd = abfd;
return &new->symbol;
}
boolean
DEFUN(NAME(aout,slurp_symbol_table),(abfd),
bfd *abfd)
{
bfd_size_type symbol_size;
bfd_size_type string_size;
unsigned char string_chars[BYTES_IN_WORD];
struct external_nlist *syms;
char *strings;
aout_symbol_type *cached;
/* If there's no work to be done, don't do any */
if (obj_aout_symbols (abfd) != (aout_symbol_type *)NULL) return true;
symbol_size = exec_hdr(abfd)->a_syms;
if (symbol_size == 0) {
bfd_error = no_symbols;
return false;
}
bfd_seek (abfd, obj_str_filepos (abfd), SEEK_SET);
if (bfd_read ((PTR)string_chars, BYTES_IN_WORD, 1, abfd) != BYTES_IN_WORD)
return false;
string_size = GET_WORD (abfd, string_chars);
strings =(char *) bfd_alloc(abfd, string_size + 1);
cached = (aout_symbol_type *)
bfd_zalloc(abfd, (bfd_size_type)(bfd_get_symcount (abfd) * sizeof(aout_symbol_type)));
/* malloc this, so we can free it if simply. The symbol caching
might want to allocate onto the bfd's obstack */
syms = (struct external_nlist *) malloc(symbol_size);
bfd_seek (abfd, obj_sym_filepos (abfd), SEEK_SET);
if (bfd_read ((PTR)syms, 1, symbol_size, abfd) != symbol_size) {
bailout:
if (syms) free (syms);
if (cached) bfd_release (abfd, cached);
if (strings)bfd_release (abfd, strings);
return false;
}
bfd_seek (abfd, obj_str_filepos (abfd), SEEK_SET);
if (bfd_read ((PTR)strings, 1, string_size, abfd) != string_size) {
goto bailout;
}
/* OK, now walk the new symtable, cacheing symbol properties */
{
register struct external_nlist *sym_pointer;
register struct external_nlist *sym_end = syms + bfd_get_symcount (abfd);
register aout_symbol_type *cache_ptr = cached;
/* Run through table and copy values */
for (sym_pointer = syms, cache_ptr = cached;
sym_pointer < sym_end; sym_pointer++, cache_ptr++)
{
bfd_vma x = GET_WORD(abfd, sym_pointer->e_strx);
cache_ptr->symbol.the_bfd = abfd;
if (x)
cache_ptr->symbol.name = x + strings;
else
cache_ptr->symbol.name = (char *)NULL;
cache_ptr->symbol.value = GET_SWORD(abfd, sym_pointer->e_value);
cache_ptr->desc = bfd_get_16(abfd, sym_pointer->e_desc);
cache_ptr->other =bfd_get_8(abfd, sym_pointer->e_other);
cache_ptr->type = bfd_get_8(abfd, sym_pointer->e_type);
cache_ptr->symbol.udata = 0;
translate_from_native_sym_flags (sym_pointer, cache_ptr, abfd);
}
}
obj_aout_symbols (abfd) = cached;
free((PTR)syms);
return true;
}
void
DEFUN(NAME(aout,write_syms),(abfd),
bfd *abfd)
{
unsigned int count ;
asymbol **generic = bfd_get_outsymbols (abfd);
bfd_size_type stindex = BYTES_IN_WORD; /* initial string length */
for (count = 0; count < bfd_get_symcount (abfd); count++) {
asymbol *g = generic[count];
struct external_nlist nsp;
if (g->name) {
unsigned int length = strlen(g->name) +1;
PUT_WORD (abfd, stindex, (unsigned char *)nsp.e_strx);
stindex += length;
}
else {
PUT_WORD (abfd, 0, (unsigned char *)nsp.e_strx);
}
if (g->the_bfd->xvec->flavour == abfd->xvec->flavour)
{
bfd_h_put_16(abfd, aout_symbol(g)->desc, nsp.e_desc);
bfd_h_put_8(abfd, aout_symbol(g)->other, nsp.e_other);
bfd_h_put_8(abfd, aout_symbol(g)->type, nsp.e_type);
}
else
{
bfd_h_put_16(abfd,0, nsp.e_desc);
bfd_h_put_8(abfd, 0, nsp.e_other);
bfd_h_put_8(abfd, 0, nsp.e_type);
}
translate_to_native_sym_flags (&nsp, g, abfd);
bfd_write((PTR)&nsp,1,EXTERNAL_LIST_SIZE, abfd);
}
/* Now output the strings. Be sure to put string length into correct
* byte ordering before writing it.
*/
{
char buffer[BYTES_IN_WORD];
PUT_WORD (abfd, stindex, (unsigned char *)buffer);
bfd_write((PTR)buffer, 1, BYTES_IN_WORD, abfd);
}
generic = bfd_get_outsymbols(abfd);
for (count = 0; count < bfd_get_symcount(abfd); count++)
{
asymbol *g = *(generic++);
if (g->name)
{
size_t length = strlen(g->name)+1;
bfd_write((PTR)g->name, 1, length, abfd);
}
if ((g->flags & BSF_FAKE)==0) {
g->KEEPIT = (KEEPITTYPE) count;
}
}
}
unsigned int
DEFUN(NAME(aout,get_symtab),(abfd, location),
bfd *abfd AND
asymbol **location)
{
unsigned int counter = 0;
aout_symbol_type *symbase;
if (!NAME(aout,slurp_symbol_table)(abfd)) return 0;
for (symbase = obj_aout_symbols(abfd); counter++ < bfd_get_symcount (abfd);)
*(location++) = (asymbol *)( symbase++);
*location++ =0;
return bfd_get_symcount(abfd);
}
/* Standard reloc stuff */
/* Output standard relocation information to a file in target byte order. */
void
DEFUN(NAME(aout,swap_std_reloc_out),(abfd, g, natptr),
bfd *abfd AND
arelent *g AND
struct reloc_std_external *natptr)
{
int r_index;
int r_extern;
unsigned int r_length;
int r_pcrel;
int r_baserel, r_jmptable, r_relative;
unsigned int r_addend;
PUT_WORD(abfd, g->address, natptr->r_address);
r_length = g->howto->size ; /* Size as a power of two */
r_pcrel = (int) g->howto->pc_relative; /* Relative to PC? */
/* r_baserel, r_jmptable, r_relative??? FIXME-soon */
r_baserel = 0;
r_jmptable = 0;
r_relative = 0;
r_addend = g->addend; /* Start here, see how it goes */
/* name was clobbered by aout_write_syms to be symbol index */
if (g->sym_ptr_ptr != NULL)
{
if ((*(g->sym_ptr_ptr))->section) {
/* put the section offset into the addend for output */
r_addend += (*(g->sym_ptr_ptr))->section->vma;
}
r_index = ((*(g->sym_ptr_ptr))->KEEPIT);
r_extern = 1;
}
else {
r_extern = 0;
if (g->section == NULL) {
/* It is possible to have a reloc with nothing, we generate an
abs + 0 */
r_addend = 0;
r_index = N_ABS | N_EXT;
}
else if(g->section->output_section == obj_textsec(abfd)) {
r_index = N_TEXT | N_EXT;
r_addend += g->section->output_section->vma;
}
else if (g->section->output_section == obj_datasec(abfd)) {
r_index = N_DATA | N_EXT;
r_addend += g->section->output_section->vma;
}
else if (g->section->output_section == obj_bsssec(abfd)) {
r_index = N_BSS | N_EXT ;
r_addend += g->section->output_section->vma;
}
else {
BFD_ASSERT(0);
r_index = N_ABS | N_EXT;
}
}
/* now the fun stuff */
if (abfd->xvec->header_byteorder_big_p != false) {
natptr->r_index[0] = r_index >> 16;
natptr->r_index[1] = r_index >> 8;
natptr->r_index[2] = r_index;
natptr->r_type[0] =
(r_extern? RELOC_STD_BITS_EXTERN_BIG: 0)
| (r_pcrel? RELOC_STD_BITS_PCREL_BIG: 0)
| (r_baserel? RELOC_STD_BITS_BASEREL_BIG: 0)
| (r_jmptable? RELOC_STD_BITS_JMPTABLE_BIG: 0)
| (r_relative? RELOC_STD_BITS_RELATIVE_BIG: 0)
| (r_length << RELOC_STD_BITS_LENGTH_SH_BIG);
} else {
natptr->r_index[2] = r_index >> 16;
natptr->r_index[1] = r_index >> 8;
natptr->r_index[0] = r_index;
natptr->r_type[0] =
(r_extern? RELOC_STD_BITS_EXTERN_LITTLE: 0)
| (r_pcrel? RELOC_STD_BITS_PCREL_LITTLE: 0)
| (r_baserel? RELOC_STD_BITS_BASEREL_LITTLE: 0)
| (r_jmptable? RELOC_STD_BITS_JMPTABLE_LITTLE: 0)
| (r_relative? RELOC_STD_BITS_RELATIVE_LITTLE: 0)
| (r_length << RELOC_STD_BITS_LENGTH_SH_LITTLE);
}
}
/* Extended stuff */
/* Output extended relocation information to a file in target byte order. */
void
DEFUN(NAME(aout,swap_ext_reloc_out),(abfd, g, natptr),
bfd *abfd AND
arelent *g AND
register struct reloc_ext_external *natptr)
{
int r_index;
int r_extern;
unsigned int r_type;
unsigned int r_addend;
PUT_WORD (abfd, g->address, natptr->r_address);
/* Find a type in the output format which matches the input howto -
at the moment we assume input format == output format FIXME!! */
r_type = (enum reloc_type) g->howto->type;
r_addend = g->addend; /* Start here, see how it goes */
/* name was clobbered by aout_write_syms to be symbol index*/
if (g->sym_ptr_ptr != NULL)
{
if ((*(g->sym_ptr_ptr))->section) {
/* put the section offset into the addend for output */
r_addend += (*(g->sym_ptr_ptr))->section->vma;
}
r_index = stoi((*(g->sym_ptr_ptr))->KEEPIT);
r_extern = 1;
}
else {
r_extern = 0;
if (g->section == NULL) {
BFD_ASSERT(0);
r_index = N_ABS | N_EXT;
}
else if(g->section->output_section == obj_textsec(abfd)) {
r_index = N_TEXT | N_EXT;
r_addend += g->section->output_section->vma;
}
else if (g->section->output_section == obj_datasec(abfd)) {
r_index = N_DATA | N_EXT;
r_addend += g->section->output_section->vma;
}
else if (g->section->output_section == obj_bsssec(abfd)) {
r_index = N_BSS | N_EXT ;
r_addend += g->section->output_section->vma;
}
else {
BFD_ASSERT(0);
r_index = N_ABS | N_EXT;
}
}
/* now the fun stuff */
if (abfd->xvec->header_byteorder_big_p != false) {
natptr->r_index[0] = r_index >> 16;
natptr->r_index[1] = r_index >> 8;
natptr->r_index[2] = r_index;
natptr->r_type[0] =
(r_extern? RELOC_EXT_BITS_EXTERN_BIG: 0)
| (r_type << RELOC_EXT_BITS_TYPE_SH_BIG);
} else {
natptr->r_index[2] = r_index >> 16;
natptr->r_index[1] = r_index >> 8;
natptr->r_index[0] = r_index;
natptr->r_type[0] =
(r_extern? RELOC_EXT_BITS_EXTERN_LITTLE: 0)
| (r_type << RELOC_EXT_BITS_TYPE_SH_LITTLE);
}
PUT_WORD (abfd, r_addend, natptr->r_addend);
}
#define MOVE_ADDRESS(ad) \
if (r_extern) { \
cache_ptr->sym_ptr_ptr = symbols + r_index; \
cache_ptr->section = (asection *)NULL; \
cache_ptr->addend = ad; \
} else { \
cache_ptr->sym_ptr_ptr = (asymbol **)NULL; \
switch (r_index) { \
case N_TEXT: \
case N_TEXT | N_EXT: \
cache_ptr->section = obj_textsec(abfd); \
cache_ptr->addend = ad - su->textsec->vma; \
break; \
case N_DATA: \
case N_DATA | N_EXT: \
cache_ptr->section = obj_datasec(abfd); \
cache_ptr->addend = ad - su->datasec->vma; \
break; \
case N_BSS: \
case N_BSS | N_EXT: \
cache_ptr->section = obj_bsssec(abfd); \
cache_ptr->addend = ad - su->bsssec->vma; \
break; \
case N_ABS: \
case N_ABS | N_EXT: \
cache_ptr->section = NULL; /* No section */ \
cache_ptr->addend = ad; /* FIXME, is this right? */ \
BFD_ASSERT(1); \
break; \
default: \
cache_ptr->section = NULL; /* No section */ \
cache_ptr->addend = ad; /* FIXME, is this right? */ \
BFD_ASSERT(1); \
break; \
} \
} \
void
DEFUN(NAME(aout,swap_ext_reloc_in), (abfd, bytes, cache_ptr, symbols),
bfd *abfd AND
struct reloc_ext_external *bytes AND
arelent *cache_ptr AND
asymbol **symbols)
{
int r_index;
int r_extern;
unsigned int r_type;
struct aoutdata *su = (struct aoutdata *)(abfd->tdata);
cache_ptr->address = (GET_SWORD (abfd, bytes->r_address));
/* now the fun stuff */
if (abfd->xvec->header_byteorder_big_p != false) {
r_index = (bytes->r_index[0] << 16)
| (bytes->r_index[1] << 8)
| bytes->r_index[2];
r_extern = (0 != (bytes->r_type[0] & RELOC_EXT_BITS_EXTERN_BIG));
r_type = (bytes->r_type[0] & RELOC_EXT_BITS_TYPE_BIG)
>> RELOC_EXT_BITS_TYPE_SH_BIG;
} else {
r_index = (bytes->r_index[2] << 16)
| (bytes->r_index[1] << 8)
| bytes->r_index[0];
r_extern = (0 != (bytes->r_type[0] & RELOC_EXT_BITS_EXTERN_LITTLE));
r_type = (bytes->r_type[0] & RELOC_EXT_BITS_TYPE_LITTLE)
>> RELOC_EXT_BITS_TYPE_SH_LITTLE;
}
cache_ptr->howto = howto_table_ext + r_type;
MOVE_ADDRESS(GET_SWORD(abfd,bytes->r_addend));
}
void
DEFUN(NAME(aout,swap_std_reloc_in), (abfd, bytes, cache_ptr, symbols),
bfd *abfd AND
struct reloc_std_external *bytes AND
arelent *cache_ptr AND
asymbol **symbols)
{
int r_index;
int r_extern;
unsigned int r_length;
int r_pcrel;
int r_baserel, r_jmptable, r_relative;
struct aoutdata *su = (struct aoutdata *)(abfd->tdata);
cache_ptr->address = (int32_type)(bfd_h_get_32 (abfd, bytes->r_address));
/* now the fun stuff */
if (abfd->xvec->header_byteorder_big_p != false) {
r_index = (bytes->r_index[0] << 16)
| (bytes->r_index[1] << 8)
| bytes->r_index[2];
r_extern = (0 != (bytes->r_type[0] & RELOC_STD_BITS_EXTERN_BIG));
r_pcrel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_PCREL_BIG));
r_baserel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_BASEREL_BIG));
r_jmptable= (0 != (bytes->r_type[0] & RELOC_STD_BITS_JMPTABLE_BIG));
r_relative= (0 != (bytes->r_type[0] & RELOC_STD_BITS_RELATIVE_BIG));
r_length = (bytes->r_type[0] & RELOC_STD_BITS_LENGTH_BIG)
>> RELOC_STD_BITS_LENGTH_SH_BIG;
} else {
r_index = (bytes->r_index[2] << 16)
| (bytes->r_index[1] << 8)
| bytes->r_index[0];
r_extern = (0 != (bytes->r_type[0] & RELOC_STD_BITS_EXTERN_LITTLE));
r_pcrel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_PCREL_LITTLE));
r_baserel = (0 != (bytes->r_type[0] & RELOC_STD_BITS_BASEREL_LITTLE));
r_jmptable= (0 != (bytes->r_type[0] & RELOC_STD_BITS_JMPTABLE_LITTLE));
r_relative= (0 != (bytes->r_type[0] & RELOC_STD_BITS_RELATIVE_LITTLE));
r_length = (bytes->r_type[0] & RELOC_STD_BITS_LENGTH_LITTLE)
>> RELOC_STD_BITS_LENGTH_SH_LITTLE;
}
cache_ptr->howto = howto_table_std + r_length + 4 * r_pcrel;
/* FIXME-soon: Roll baserel, jmptable, relative bits into howto setting */
MOVE_ADDRESS(0);
}
/* Reloc hackery */
boolean
DEFUN(NAME(aout,slurp_reloc_table),(abfd, asect, symbols),
bfd *abfd AND
sec_ptr asect AND
asymbol **symbols)
{
unsigned int count;
bfd_size_type reloc_size;
PTR relocs;
arelent *reloc_cache;
size_t each_size;
if (asect->relocation) return true;
if (asect->flags & SEC_CONSTRUCTOR) return true;
if (asect == obj_datasec (abfd)) {
reloc_size = exec_hdr(abfd)->a_drsize;
goto doit;
}
if (asect == obj_textsec (abfd)) {
reloc_size = exec_hdr(abfd)->a_trsize;
goto doit;
}
bfd_error = invalid_operation;
return false;
doit:
bfd_seek (abfd, asect->rel_filepos, SEEK_SET);
each_size = obj_reloc_entry_size (abfd);
count = reloc_size / each_size;
reloc_cache = (arelent *) bfd_zalloc (abfd, (size_t)(count * sizeof
(arelent)));
if (!reloc_cache) {
nomem:
bfd_error = no_memory;
return false;
}
relocs = (PTR) bfd_alloc (abfd, reloc_size);
if (!relocs) {
bfd_release (abfd, reloc_cache);
goto nomem;
}
if (bfd_read (relocs, 1, reloc_size, abfd) != reloc_size) {
bfd_release (abfd, relocs);
bfd_release (abfd, reloc_cache);
bfd_error = system_call_error;
return false;
}
if (each_size == RELOC_EXT_SIZE) {
register struct reloc_ext_external *rptr = (struct reloc_ext_external *) relocs;
unsigned int counter = 0;
arelent *cache_ptr = reloc_cache;
for (; counter < count; counter++, rptr++, cache_ptr++) {
NAME(aout,swap_ext_reloc_in)(abfd, rptr, cache_ptr, symbols);
}
} else {
register struct reloc_std_external *rptr = (struct reloc_std_external*) relocs;
unsigned int counter = 0;
arelent *cache_ptr = reloc_cache;
for (; counter < count; counter++, rptr++, cache_ptr++) {
NAME(aout,swap_std_reloc_in)(abfd, rptr, cache_ptr, symbols);
}
}
bfd_release (abfd,relocs);
asect->relocation = reloc_cache;
asect->reloc_count = count;
return true;
}
/* Write out a relocation section into an object file. */
boolean
DEFUN(NAME(aout,squirt_out_relocs),(abfd, section),
bfd *abfd AND
asection *section)
{
arelent **generic;
unsigned char *native, *natptr;
size_t each_size;
unsigned int count = section->reloc_count;
size_t natsize;
if (count == 0) return true;
each_size = obj_reloc_entry_size (abfd);
natsize = each_size * count;
native = (unsigned char *) bfd_zalloc (abfd, natsize);
if (!native) {
bfd_error = no_memory;
return false;
}
generic = section->orelocation;
if (each_size == RELOC_EXT_SIZE)
{
for (natptr = native;
count != 0;
--count, natptr += each_size, ++generic)
NAME(aout,swap_ext_reloc_out) (abfd, *generic, (struct reloc_ext_external *)natptr);
}
else
{
for (natptr = native;
count != 0;
--count, natptr += each_size, ++generic)
NAME(aout,swap_std_reloc_out)(abfd, *generic, (struct reloc_std_external *)natptr);
}
if ( bfd_write ((PTR) native, 1, natsize, abfd) != natsize) {
bfd_release(abfd, native);
return false;
}
bfd_release (abfd, native);
return true;
}
/* This is stupid. This function should be a boolean predicate */
unsigned int
DEFUN(NAME(aout,canonicalize_reloc),(abfd, section, relptr, symbols),
bfd *abfd AND
sec_ptr section AND
arelent **relptr AND
asymbol **symbols)
{
arelent *tblptr = section->relocation;
unsigned int count;
if (!(tblptr || NAME(aout,slurp_reloc_table)(abfd, section, symbols)))
return 0;
if (section->flags & SEC_CONSTRUCTOR) {
arelent_chain *chain = section->constructor_chain;
for (count = 0; count < section->reloc_count; count ++) {
*relptr ++ = &chain->relent;
chain = chain->next;
}
}
else {
tblptr = section->relocation;
if (!tblptr) return 0;
for (count = 0; count++ < section->reloc_count;)
{
*relptr++ = tblptr++;
}
}
*relptr = 0;
return section->reloc_count;
}
unsigned int
DEFUN(NAME(aout,get_reloc_upper_bound),(abfd, asect),
bfd *abfd AND
sec_ptr asect)
{
if (bfd_get_format (abfd) != bfd_object) {
bfd_error = invalid_operation;
return 0;
}
if (asect->flags & SEC_CONSTRUCTOR) {
return (sizeof (arelent *) * (asect->reloc_count+1));
}
if (asect == obj_datasec (abfd))
return (sizeof (arelent *) *
((exec_hdr(abfd)->a_drsize / obj_reloc_entry_size (abfd))
+1));
if (asect == obj_textsec (abfd))
return (sizeof (arelent *) *
((exec_hdr(abfd)->a_trsize / obj_reloc_entry_size (abfd))
+1));
bfd_error = invalid_operation;
return 0;
}
unsigned int
DEFUN(NAME(aout,get_symtab_upper_bound),(abfd),
bfd *abfd)
{
if (!NAME(aout,slurp_symbol_table)(abfd)) return 0;
return (bfd_get_symcount (abfd)+1) * (sizeof (aout_symbol_type *));
}
alent *
DEFUN(NAME(aout,get_lineno),(ignore_abfd, ignore_symbol),
bfd *ignore_abfd AND
asymbol *ignore_symbol)
{
return (alent *)NULL;
}
void
DEFUN(NAME(aout,print_symbol),(ignore_abfd, afile, symbol, how),
bfd *ignore_abfd AND
PTR afile AND
asymbol *symbol AND
bfd_print_symbol_enum_type how)
{
FILE *file = (FILE *)afile;
switch (how) {
case bfd_print_symbol_name_enum:
if (symbol->name)
fprintf(file,"%s", symbol->name);
break;
case bfd_print_symbol_type_enum:
fprintf(file,"%4x %2x %2x",(unsigned)(aout_symbol(symbol)->desc & 0xffff),
(unsigned)(aout_symbol(symbol)->other & 0xff),
(unsigned)(aout_symbol(symbol)->type));
break;
case bfd_print_symbol_all_enum:
{
CONST char *section_name = symbol->section == (asection *)NULL ?
"*abs" : symbol->section->name;
bfd_print_symbol_vandf((PTR)file,symbol);
fprintf(file," %-5s %04x %02x %02x",
section_name,
(unsigned)(aout_symbol(symbol)->desc & 0xffff),
(unsigned)(aout_symbol(symbol)->other & 0xff),
(unsigned)(aout_symbol(symbol)->type & 0xff),
symbol->name);
if (symbol->name)
fprintf(file," %s", symbol->name);
}
break;
}
}
/*
provided a BFD, a section and an offset into the section, calculate
and return the name of the source file and the line nearest to the
wanted location.
*/
boolean
DEFUN(NAME(aout,find_nearest_line),(abfd,
section,
symbols,
offset,
filename_ptr,
functionname_ptr,
line_ptr),
bfd *abfd AND
asection *section AND
asymbol **symbols AND
bfd_vma offset AND
CONST char **filename_ptr AND
CONST char **functionname_ptr AND
unsigned int *line_ptr)
{
/* Run down the file looking for the filename, function and linenumber */
asymbol **p;
static char buffer[100];
bfd_vma high_line_vma = ~0;
bfd_vma low_func_vma = 0;
asymbol *func = 0;
*filename_ptr = abfd->filename;
*functionname_ptr = 0;
*line_ptr = 0;
if (symbols != (asymbol **)NULL) {
for (p = symbols; *p; p++) {
aout_symbol_type *q = (aout_symbol_type *)(*p);
switch (q->type){
case N_SO:
*filename_ptr = q->symbol.name;
if (obj_textsec(abfd) != section) {
return true;
}
break;
case N_SLINE:
case N_DSLINE:
case N_BSLINE:
/* We'll keep this if it resolves nearer than the one we have already */
if (q->symbol.value >= offset &&
q->symbol.value < high_line_vma) {
*line_ptr = q->desc;
high_line_vma = q->symbol.value;
}
break;
case N_FUN:
{
/* We'll keep this if it is nearer than the one we have already */
if (q->symbol.value >= low_func_vma &&
q->symbol.value <= offset) {
low_func_vma = q->symbol.value;
func = (asymbol *)q;
}
if (*line_ptr && func) {
CONST char *function = func->name;
char *p;
strncpy(buffer, function, sizeof(buffer)-1);
buffer[sizeof(buffer)-1] = 0;
/* Have to remove : stuff */
p = strchr(buffer,':');
if (p != NULL) { *p = NULL; }
*functionname_ptr = buffer;
return true;
}
}
break;
}
}
}
return true;
}
int
DEFUN(NAME(aout,sizeof_headers),(ignore_abfd, ignore),
bfd *ignore_abfd AND
boolean ignore)
{
return EXEC_BYTES_SIZE;
}
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