home *** CD-ROM | disk | FTP | other *** search
- /* BFD semi-generic back-end for a.out binaries.
- Copyright 1990, 1991, 1992, 1993 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. */
-
- /*
- SECTION
- a.out backends
-
-
- DESCRIPTION
-
- 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,
- @code{newsos3.c} for the Sony NEWS, and @code{demo64.c} 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
-
- | #define ARCH_SIZE 32
- | #include "aoutx.h"
-
- Which exports names:
-
- | ...
- | aout_32_canonicalize_reloc
- | aout_32_find_nearest_line
- | aout_32_get_lineno
- | aout_32_get_reloc_upper_bound
- | ...
-
- from sunos.c
-
- | #define ARCH 32
- | #define TARGET_NAME "a.out-sunos-big"
- | #define VECNAME sunos_big_vec
- | #include "aoutf1.h"
-
- requires all the names from aout32.c, and produces the jump vector
-
- | sunos_big_vec
-
- 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:
-
- | TDEFAULTS = -DDEFAULT_VECTOR=host_aout_big_vec
- | TDEPFILES= host-aout.o trad-core.o
-
- in the <<config/mt-XXX>> file, and modify configure.in to use the
- <<mt-XXX>> file (by setting "<<bfd_target=XXX>>") when your
- configuration is selected.
-
- */
-
- /* Some assumptions:
- * Any BFD with D_PAGED set is ZMAGIC, and vice versa.
- Doesn't matter what the setting of WP_TEXT is on output, but it'll
- get set on input.
- * Any BFD with D_PAGED clear and WP_TEXT set is NMAGIC.
- * Any BFD with both flags clear is OMAGIC.
- (Just want to make these explicit, so the conditions tested in this
- file make sense if you're more familiar with a.out than with BFD.) */
-
- #define KEEPIT flags
- #define KEEPITTYPE int
-
- #include <assert.h>
- #include <string.h> /* For strchr and friends */
- #include "bfd.h"
- #include <sysdep.h>
- #include <ansidecl.h>
-
- struct external_exec;
- #include "libaout.h"
- #include "libbfd.h"
- #include "aout/aout64.h"
- #include "aout/stab_gnu.h"
- #include "aout/ar.h"
-
- extern void (*bfd_error_trap)();
-
- /*
- SUBSECTION
- relocations
-
- DESCRIPTION
- 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
-
- #define howto_table_ext NAME(aout,ext_howto_table)
- #define howto_table_std NAME(aout,std_howto_table)
-
- 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),
- };
-
- /* Convert standard reloc records to "arelent" format (incl byte swap). */
-
- 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),
- };
-
- CONST struct reloc_howto_struct *
- DEFUN(NAME(aout,reloc_type_lookup),(abfd,code),
- bfd *abfd AND
- bfd_reloc_code_real_type code)
- {
- #define EXT(i,j) case i: return &howto_table_ext[j]
- #define STD(i,j) case i: return &howto_table_std[j]
- int ext = obj_reloc_entry_size (abfd) == RELOC_EXT_SIZE;
- if (code == BFD_RELOC_CTOR)
- switch (bfd_get_arch_info (abfd)->bits_per_address)
- {
- case 32:
- code = BFD_RELOC_32;
- break;
- }
- if (ext)
- switch (code)
- {
- EXT (BFD_RELOC_32, 2);
- EXT (BFD_RELOC_HI22, 8);
- EXT (BFD_RELOC_LO10, 11);
- EXT (BFD_RELOC_32_PCREL_S2, 6);
- default: return (CONST struct reloc_howto_struct *) 0;
- }
- else
- /* std relocs */
- switch (code)
- {
- STD (BFD_RELOC_16, 1);
- STD (BFD_RELOC_32, 2);
- STD (BFD_RELOC_8_PCREL, 4);
- STD (BFD_RELOC_16_PCREL, 5);
- STD (BFD_RELOC_32_PCREL, 6);
- default: return (CONST struct reloc_howto_struct *) 0;
- }
- }
-
- extern bfd_error_vector_type bfd_error_vector;
-
- /*
- SUBSECTION
- Internal Entry Points
-
- DESCRIPTION
- @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).
-
- */
-
- /*
- FUNCTION
- aout_<size>_swap_exec_header_in
-
- DESCRIPTION
- Swaps the information in an executable header taken from a raw
- byte stream memory image, into the internal exec_header
- structure.
-
- SYNOPSIS
- void aout_<size>_swap_exec_header_in,
- (bfd *abfd,
- struct external_exec *raw_bytes,
- struct internal_exec *execp);
- */
-
- #ifndef NAME_swap_exec_header_in
- 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;
-
- /* The internal_exec structure has some fields that are unused in this
- configuration (IE for i960), so ensure that all such uninitialized
- fields are zero'd out. There are places where two of these structs
- are memcmp'd, and thus the contents do matter. */
- memset (execp, 0, sizeof (struct internal_exec));
- /* 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);
- }
- #define NAME_swap_exec_header_in NAME(aout,swap_exec_header_in)
- #endif
-
- /*
- FUNCTION
- aout_<size>_swap_exec_header_out
-
- DESCRIPTION
- Swaps the information in an internal exec header structure
- into the supplied buffer ready for writing to disk.
-
- SYNOPSIS
- 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);
- }
-
-
-
- /*
- FUNCTION
- aout_<size>_some_aout_object_p
-
- DESCRIPTION
- 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.
-
- SYNOPSIS
- 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, execp, callback_to_real_object_p),
- bfd *abfd AND
- struct internal_exec *execp AND
- bfd_target *(*callback_to_real_object_p) PARAMS ((bfd *)))
- {
- struct aout_data_struct *rawptr, *oldrawptr;
- bfd_target *result;
-
- rawptr = (struct aout_data_struct *) bfd_zalloc (abfd, sizeof (struct aout_data_struct ));
- if (rawptr == NULL) {
- bfd_error = no_memory;
- return 0;
- }
-
- oldrawptr = abfd->tdata.aout_data;
- abfd->tdata.aout_data = rawptr;
- abfd->tdata.aout_data->a.hdr = &rawptr->e;
- *(abfd->tdata.aout_data->a.hdr) = *execp; /* Copy in the internal_exec struct */
- execp = abfd->tdata.aout_data->a.hdr;
-
- /* Set the file flags */
- abfd->flags = NO_FLAGS;
- if (execp->a_drsize || execp->a_trsize)
- abfd->flags |= HAS_RELOC;
- /* Setting of EXEC_P has been deferred to the bottom of this function */
- if (execp->a_syms)
- abfd->flags |= HAS_LINENO | HAS_DEBUG | HAS_SYMS | HAS_LOCALS;
-
- if (N_MAGIC (*execp) == ZMAGIC)
- {
- abfd->flags |= D_PAGED|WP_TEXT;
- adata(abfd).magic = z_magic;
- }
- else if (N_MAGIC (*execp) == NMAGIC)
- {
- abfd->flags |= WP_TEXT;
- adata(abfd).magic = n_magic;
- }
- else
- adata(abfd).magic = o_magic;
-
- 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);
-
- /* The default relocation entry size is that of traditional V7 Unix. */
- obj_reloc_entry_size (abfd) = RELOC_STD_SIZE;
-
- /* The default symbol entry size is that of traditional Unix. */
- obj_symbol_entry_size (abfd) = EXTERNAL_NLIST_SIZE;
-
- /* create the sections. This is raunchy, but bfd_close wants to reclaim
- them */
-
- obj_textsec (abfd) = bfd_make_section_old_way (abfd, ".text");
- obj_datasec (abfd) = bfd_make_section_old_way (abfd, ".data");
- obj_bsssec (abfd) = bfd_make_section_old_way (abfd, ".bss");
-
- #if 0
- (void)bfd_make_section (abfd, ".text");
- (void)bfd_make_section (abfd, ".data");
- (void)bfd_make_section (abfd, ".bss");
- #endif
-
- obj_datasec (abfd)->_raw_size = execp->a_data;
- obj_bsssec (abfd)->_raw_size = execp->a_bss;
-
- obj_textsec (abfd)->flags = (execp->a_trsize != 0 ?
- (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS | SEC_RELOC) :
- (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS));
- obj_datasec (abfd)->flags = (execp->a_drsize != 0 ?
- (SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_HAS_CONTENTS | SEC_RELOC) :
- (SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_HAS_CONTENTS));
- obj_bsssec (abfd)->flags = SEC_ALLOC;
-
- #ifdef THIS_IS_ONLY_DOCUMENTATION
- /* The common code can't fill in these 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. */
-
- /* 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);
-
- obj_textsec (abfd)->size = N_TXTSIZE(*execp);
- obj_textsec (abfd)->raw_size = N_TXTSIZE(*execp);
- /* data and bss are already filled in since they're so standard */
-
- /* The virtual memory addresses of the sections */
- obj_textsec (abfd)->vma = N_TXTADDR(*execp);
- obj_datasec (abfd)->vma = N_DATADDR(*execp);
- obj_bsssec (abfd)->vma = N_BSSADDR(*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);
-
- /* Determine the architecture and machine type of the object file. */
- switch (N_MACHTYPE (*exec_hdr (abfd))) {
- default:
- abfd->obj_arch = bfd_arch_obscure;
- break;
- }
-
- adata(abfd)->page_size = PAGE_SIZE;
- adata(abfd)->segment_size = SEGMENT_SIZE;
- adata(abfd)->exec_bytes_size = EXEC_BYTES_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 */
-
- result = (*callback_to_real_object_p)(abfd);
-
- /* Now that the segment addresses have been worked out, take a better
- guess at whether the file is executable. If the entry point
- is within the text segment, assume it is. (This makes files
- executable even if their entry point address is 0, as long as
- their text starts at zero.)
-
- At some point we should probably break down and stat the file and
- declare it executable if (one of) its 'x' bits are on... */
- if ((execp->a_entry >= obj_textsec(abfd)->vma) &&
- (execp->a_entry < obj_textsec(abfd)->vma + obj_textsec(abfd)->_raw_size))
- abfd->flags |= EXEC_P;
- if (result)
- {
- #if 0 /* These should be set correctly anyways. */
- abfd->sections = obj_textsec (abfd);
- obj_textsec (abfd)->next = obj_datasec (abfd);
- obj_datasec (abfd)->next = obj_bsssec (abfd);
- #endif
- }
- else
- {
- free (rawptr);
- abfd->tdata.aout_data = oldrawptr;
- }
- return result;
- }
-
- /*
- FUNCTION
- aout_<size>_mkobject
-
- DESCRIPTION
- This routine initializes a BFD for use with a.out files.
-
- SYNOPSIS
- boolean aout_<size>_mkobject, (bfd *);
- */
-
- boolean
- DEFUN(NAME(aout,mkobject),(abfd),
- bfd *abfd)
- {
- struct aout_data_struct *rawptr;
-
- bfd_error = system_call_error;
-
- /* Use an intermediate variable for clarity */
- rawptr = (struct aout_data_struct *)bfd_zalloc (abfd, sizeof (struct aout_data_struct ));
-
- if (rawptr == NULL) {
- bfd_error = no_memory;
- return false;
- }
-
- abfd->tdata.aout_data = 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");
- bfd_make_section (abfd, BFD_ABS_SECTION_NAME);
- bfd_make_section (abfd, BFD_UND_SECTION_NAME);
- bfd_make_section (abfd, BFD_COM_SECTION_NAME);
-
- return true;
- }
-
-
- /*
- FUNCTION
- aout_<size>_machine_type
-
- DESCRIPTION
- 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.
-
- SYNOPSIS
- 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;
-
- case bfd_arch_mips:
- switch (machine) {
- case 0:
- case 2000:
- case 3000: arch_flags = M_MIPS1; break;
- case 4000:
- case 4400:
- case 6000: arch_flags = M_MIPS2; break;
- default: arch_flags = M_UNKNOWN; break;
- }
- break;
-
- default:
- arch_flags = M_UNKNOWN;
- }
- return arch_flags;
- }
-
-
- /*
- FUNCTION
- aout_<size>_set_arch_mach
-
- DESCRIPTION
- Sets the architecture and the machine of the BFD to those
- values supplied. Verifies that the format can support the
- architecture required.
-
- SYNOPSIS
- 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)
- {
- bfd_default_set_arch_mach(abfd, arch, machine);
- if (arch != bfd_arch_unknown &&
- NAME(aout,machine_type) (arch, machine) == M_UNKNOWN)
- return false; /* We can't represent this type */
-
- /* Determine the size of a relocation entry */
- switch (arch) {
- case bfd_arch_sparc:
- case bfd_arch_a29k:
- case bfd_arch_mips:
- obj_reloc_entry_size (abfd) = RELOC_EXT_SIZE;
- break;
- default:
- obj_reloc_entry_size (abfd) = RELOC_STD_SIZE;
- break;
- }
-
- return (*aout_backend_info(abfd)->set_sizes) (abfd);
- }
-
- boolean
- DEFUN (NAME (aout,adjust_sizes_and_vmas), (abfd, text_size, text_end),
- bfd *abfd AND bfd_size_type *text_size AND file_ptr *text_end)
- {
- struct internal_exec *execp = exec_hdr (abfd);
- if ((obj_textsec (abfd) == NULL) || (obj_datasec (abfd) == NULL))
- {
- bfd_error = invalid_operation;
- return false;
- }
- if (adata(abfd).magic != undecided_magic) return true;
- obj_textsec(abfd)->_raw_size =
- align_power(obj_textsec(abfd)->_raw_size,
- obj_textsec(abfd)->alignment_power);
-
- *text_size = obj_textsec (abfd)->_raw_size;
- /* Rule (heuristic) for when to pad to a new page. Note that there
- * are (at least) two ways demand-paged (ZMAGIC) files have been
- * handled. Most Berkeley-based systems start the text segment at
- * (PAGE_SIZE). However, newer versions of SUNOS start the text
- * segment right after the exec header; the latter is counted in the
- * text segment size, and is paged in by the kernel with the rest of
- * the text. */
-
- /* This perhaps isn't the right way to do this, but made it simpler for me
- to understand enough to implement it. Better would probably be to go
- right from BFD flags to alignment/positioning characteristics. But the
- old code was sloppy enough about handling the flags, and had enough
- other magic, that it was a little hard for me to understand. I think
- I understand it better now, but I haven't time to do the cleanup this
- minute. */
- if (adata(abfd).magic == undecided_magic)
- {
- if (abfd->flags & D_PAGED)
- /* whether or not WP_TEXT is set */
- adata(abfd).magic = z_magic;
- else if (abfd->flags & WP_TEXT)
- adata(abfd).magic = n_magic;
- else
- adata(abfd).magic = o_magic;
- }
-
- #ifdef BFD_AOUT_DEBUG /* requires gcc2 */
- #if __GNUC__ >= 2
- fprintf (stderr, "%s text=<%x,%x,%x> data=<%x,%x,%x> bss=<%x,%x,%x>\n",
- ({ char *str;
- switch (adata(abfd).magic) {
- case n_magic: str = "NMAGIC"; break;
- case o_magic: str = "OMAGIC"; break;
- case z_magic: str = "ZMAGIC"; break;
- default: abort ();
- }
- str;
- }),
- obj_textsec(abfd)->vma, obj_textsec(abfd)->_raw_size, obj_textsec(abfd)->alignment_power,
- obj_datasec(abfd)->vma, obj_datasec(abfd)->_raw_size, obj_datasec(abfd)->alignment_power,
- obj_bsssec(abfd)->vma, obj_bsssec(abfd)->_raw_size, obj_bsssec(abfd)->alignment_power);
- #endif
- #endif
-
- switch (adata(abfd).magic)
- {
- case o_magic:
- {
- file_ptr pos = adata (abfd).exec_bytes_size;
- bfd_vma vma = 0;
- int pad = 0;
-
- obj_textsec(abfd)->filepos = pos;
- pos += obj_textsec(abfd)->_raw_size;
- vma += obj_textsec(abfd)->_raw_size;
- if (!obj_datasec(abfd)->user_set_vma)
- {
- #if 0 /* ?? Does alignment in the file image really matter? */
- pad = align_power (vma, obj_datasec(abfd)->alignment_power) - vma;
- #endif
- obj_textsec(abfd)->_raw_size += pad;
- pos += pad;
- vma += pad;
- obj_datasec(abfd)->vma = vma;
- }
- obj_datasec(abfd)->filepos = pos;
- pos += obj_datasec(abfd)->_raw_size;
- vma += obj_datasec(abfd)->_raw_size;
- if (!obj_bsssec(abfd)->user_set_vma)
- {
- #if 0
- pad = align_power (vma, obj_bsssec(abfd)->alignment_power) - vma;
- #endif
- obj_datasec(abfd)->_raw_size += pad;
- pos += pad;
- vma += pad;
- obj_bsssec(abfd)->vma = vma;
- }
- obj_bsssec(abfd)->filepos = pos;
- execp->a_text = obj_textsec(abfd)->_raw_size;
- execp->a_data = obj_datasec(abfd)->_raw_size;
- execp->a_bss = obj_bsssec(abfd)->_raw_size;
- N_SET_MAGIC (*execp, OMAGIC);
- }
- break;
- case z_magic:
- {
- bfd_size_type data_pad, text_pad;
- file_ptr text_end;
- CONST struct aout_backend_data *abdp;
- int ztih;
- bfd_vma data_vma;
-
- abdp = aout_backend_info (abfd);
- ztih = abdp && abdp->text_includes_header;
- obj_textsec(abfd)->filepos = (ztih
- ? adata(abfd).exec_bytes_size
- : adata(abfd).page_size);
- if (! obj_textsec(abfd)->user_set_vma)
- /* ?? Do we really need to check for relocs here? */
- obj_textsec(abfd)->vma = ((abfd->flags & HAS_RELOC)
- ? 0
- : (ztih
- ? (abdp->default_text_vma
- + adata(abfd).exec_bytes_size)
- : abdp->default_text_vma));
- /* Could take strange alignment of text section into account here? */
-
- /* Find start of data. */
- text_end = obj_textsec(abfd)->filepos + obj_textsec(abfd)->_raw_size;
- text_pad = BFD_ALIGN (text_end, adata(abfd).page_size) - text_end;
- obj_textsec(abfd)->_raw_size += text_pad;
- text_end += text_pad;
-
- if (!obj_datasec(abfd)->user_set_vma)
- {
- bfd_vma vma;
- vma = obj_textsec(abfd)->vma + obj_textsec(abfd)->_raw_size;
- obj_datasec(abfd)->vma = BFD_ALIGN (vma, adata(abfd).segment_size);
- }
- data_vma = obj_datasec(abfd)->vma;
- if (abdp && abdp->zmagic_mapped_contiguous)
- {
- text_pad = (obj_datasec(abfd)->vma
- - obj_textsec(abfd)->vma
- - obj_textsec(abfd)->_raw_size);
- obj_textsec(abfd)->_raw_size += text_pad;
- }
- obj_datasec(abfd)->filepos = (obj_textsec(abfd)->filepos
- + obj_textsec(abfd)->_raw_size);
-
- /* Fix up exec header while we're at it. */
- execp->a_text = obj_textsec(abfd)->_raw_size;
- if (ztih && (!abdp || (abdp && !abdp->exec_header_not_counted)))
- execp->a_text += adata(abfd).exec_bytes_size;
- N_SET_MAGIC (*execp, ZMAGIC);
- /* Spec says data section should be rounded up to page boundary. */
- /* If extra space in page is left after data section, fudge data
- in the header so that the bss section looks smaller by that
- amount. We'll start the bss section there, and lie to the OS. */
- obj_datasec(abfd)->_raw_size
- = align_power (obj_datasec(abfd)->_raw_size,
- obj_bsssec(abfd)->alignment_power);
- execp->a_data = BFD_ALIGN (obj_datasec(abfd)->_raw_size,
- adata(abfd).page_size);
- data_pad = execp->a_data - obj_datasec(abfd)->_raw_size;
-
- if (!obj_bsssec(abfd)->user_set_vma)
- obj_bsssec(abfd)->vma = (obj_datasec(abfd)->vma
- + obj_datasec(abfd)->_raw_size);
- if (data_pad > obj_bsssec(abfd)->_raw_size)
- execp->a_bss = 0;
- else
- execp->a_bss = obj_bsssec(abfd)->_raw_size - data_pad;
- }
- break;
- case n_magic:
- {
- file_ptr pos = adata(abfd).exec_bytes_size;
- bfd_vma vma = 0;
- int pad;
-
- obj_textsec(abfd)->filepos = pos;
- if (!obj_textsec(abfd)->user_set_vma)
- obj_textsec(abfd)->vma = vma;
- else
- vma = obj_textsec(abfd)->vma;
- pos += obj_textsec(abfd)->_raw_size;
- vma += obj_textsec(abfd)->_raw_size;
- obj_datasec(abfd)->filepos = pos;
- if (!obj_datasec(abfd)->user_set_vma)
- obj_datasec(abfd)->vma = BFD_ALIGN (vma, adata(abfd).segment_size);
- vma = obj_datasec(abfd)->vma;
-
- /* Since BSS follows data immediately, see if it needs alignment. */
- vma += obj_datasec(abfd)->_raw_size;
- pad = align_power (vma, obj_bsssec(abfd)->alignment_power) - vma;
- obj_datasec(abfd)->_raw_size += pad;
- pos += obj_datasec(abfd)->_raw_size;
-
- if (!obj_bsssec(abfd)->user_set_vma)
- obj_bsssec(abfd)->vma = vma;
- else
- vma = obj_bsssec(abfd)->vma;
- }
- execp->a_text = obj_textsec(abfd)->_raw_size;
- execp->a_data = obj_datasec(abfd)->_raw_size;
- execp->a_bss = obj_bsssec(abfd)->_raw_size;
- N_SET_MAGIC (*execp, NMAGIC);
- break;
- default:
- abort ();
- }
- #ifdef BFD_AOUT_DEBUG
- fprintf (stderr, " text=<%x,%x,%x> data=<%x,%x,%x> bss=<%x,%x>\n",
- obj_textsec(abfd)->vma, obj_textsec(abfd)->_raw_size, obj_textsec(abfd)->filepos,
- obj_datasec(abfd)->vma, obj_datasec(abfd)->_raw_size, obj_datasec(abfd)->filepos,
- obj_bsssec(abfd)->vma, obj_bsssec(abfd)->_raw_size);
- #endif
- return true;
- }
-
- /*
- FUNCTION
- aout_<size>_new_section_hook
-
- DESCRIPTION
- Called by the BFD in response to a @code{bfd_make_section}
- request.
-
- SYNOPSIS
- 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 = bfd_get_arch_info(abfd)->section_align_power;
-
-
- if (bfd_get_format (abfd) == bfd_object)
- {
- if (obj_textsec(abfd) == NULL && !strcmp(newsect->name, ".text")) {
- obj_textsec(abfd)= newsect;
- newsect->target_index = N_TEXT | N_EXT;
- return true;
- }
-
- if (obj_datasec(abfd) == NULL && !strcmp(newsect->name, ".data")) {
- obj_datasec(abfd) = newsect;
- newsect->target_index = N_DATA | N_EXT;
- return true;
- }
-
- if (obj_bsssec(abfd) == NULL && !strcmp(newsect->name, ".bss")) {
- obj_bsssec(abfd) = newsect;
- newsect->target_index = N_BSS | N_EXT;
- 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)
- {
- file_ptr text_end;
- bfd_size_type text_size;
-
- 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 write_direction:
- if (NAME(aout,adjust_sizes_and_vmas) (abfd,
- &text_size,
- &text_end) == false)
- return false;
- case both_direction:
- break;
- }
- }
-
- /* 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 true;
- }
- 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) \
- || ((((sym)->type) & N_TYPE) == N_SETV))
-
- #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, statep),
- struct external_nlist *sym_pointer AND
- aout_symbol_type * cache_ptr AND
- bfd * abfd AND
- int *statep)
- {
- cache_ptr->symbol.section = 0;
- if (*statep)
- {
- /* This is an indirect symbol */
- cache_ptr->symbol.flags = BSF_DEBUGGING;
- cache_ptr->symbol.section = &bfd_und_section;
- *statep = 0;
- }
- else
- {
- 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;
- asection *into_section;
-
- arelent_chain *reloc = (arelent_chain *) bfd_alloc (abfd, sizeof (arelent_chain));
- strcpy (copy, cache_ptr->symbol.name);
-
- /* Make sure that this bfd has a section with the right contructor
- name */
- section = bfd_get_section_by_name (abfd, copy);
- if (!section)
- section = bfd_make_section (abfd, copy);
-
- /* Build a relocation entry for the constructor */
- switch ((cache_ptr->type & N_TYPE))
- {
- case N_SETA:
- into_section = &bfd_abs_section;
- cache_ptr->type = N_ABS;
- break;
- case N_SETT:
- into_section = (asection *) obj_textsec (abfd);
- cache_ptr->type = N_TEXT;
- break;
- case N_SETD:
- into_section = (asection *) obj_datasec (abfd);
- cache_ptr->type = N_DATA;
- break;
- case N_SETB:
- into_section = (asection *) obj_bsssec (abfd);
- cache_ptr->type = N_BSS;
- break;
- default:
- abort ();
- }
-
- /* Build a relocation pointing into the constuctor section
- pointing at the symbol in the set vector specified */
-
- reloc->relent.addend = cache_ptr->symbol.value;
- cache_ptr->symbol.section = into_section->symbol->section;
- reloc->relent.sym_ptr_ptr = into_section->symbol_ptr_ptr;
-
-
- /* 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->flags = SEC_CONSTRUCTOR;
-
-
- section->reloc_count++;
- section->alignment_power = 2;
-
- reloc->next = section->constructor_chain;
- section->constructor_chain = reloc;
- reloc->relent.address = section->_raw_size;
- section->_raw_size += sizeof (int *);
-
- reloc->relent.howto
- = (obj_reloc_entry_size(abfd) == RELOC_EXT_SIZE
- ? howto_table_ext : howto_table_std)
- + 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));
- cache_ptr->symbol.section = &bfd_ind_section;
- *statep = 1;
- }
-
- else 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;
- default:
- case N_ABS:
-
- cache_ptr->symbol.section = &bfd_abs_section;
- break;
- }
- }
- else
- {
-
- if (sym_is_fortrancommon (cache_ptr))
- {
- cache_ptr->symbol.flags = 0;
- cache_ptr->symbol.section = &bfd_com_section;
- }
- else
- {
-
-
- }
-
- /* 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 if (sym_is_undefined (cache_ptr))
- {
- cache_ptr->symbol.flags = 0;
- cache_ptr->symbol.section = &bfd_und_section;
- }
- else if (sym_is_absolute (cache_ptr))
- {
- cache_ptr->symbol.section = &bfd_abs_section;
- }
-
- if (sym_is_global_defn (cache_ptr))
- {
- cache_ptr->symbol.flags = BSF_GLOBAL | BSF_EXPORT;
- }
- else
- {
- cache_ptr->symbol.flags = BSF_LOCAL;
- }
- }
- }
- }
- if (cache_ptr->symbol.section == 0)
- {
- abort ();
- }
- }
-
-
-
- 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;
-
- /* mask out any existing type bits in case copying from one section
- to another */
- sym_pointer->e_type[0] &= ~N_TYPE;
-
-
- 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 if (bfd_get_output_section(cache_ptr) == &bfd_abs_section)
- {
- sym_pointer->e_type[0] |= N_ABS;
- }
- else if (bfd_get_output_section(cache_ptr) == &bfd_und_section)
- {
- sym_pointer->e_type[0] = (N_UNDF | N_EXT);
- }
- else if (bfd_get_output_section(cache_ptr) == &bfd_ind_section)
- {
- sym_pointer->e_type[0] = N_INDR;
- }
- else if (bfd_is_com_section (bfd_get_output_section (cache_ptr))) {
- sym_pointer->e_type[0] = (N_UNDF | N_EXT);
- }
- else {
- if (cache_ptr->section->output_section)
- {
-
- bfd_error_vector.nonrepresentable_section(abfd,
- bfd_get_output_section(cache_ptr)->name);
- }
- else
- {
- bfd_error_vector.nonrepresentable_section(abfd,
- cache_ptr->section->name);
-
- }
-
- }
- /* Turn the symbol from section relative to absolute again */
-
- value += cache_ptr->section->output_section->vma + cache_ptr->section->output_offset ;
-
-
- if (cache_ptr->flags & (BSF_WARNING)) {
- (sym_pointer+1)->e_type[0] = 1;
- }
-
- 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 *) bfd_xmalloc(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;
- }
- strings[string_size] = 0; /* Just in case. */
-
- /* OK, now walk the new symtable, cacheing symbol properties */
- {
- register struct external_nlist *sym_pointer;
- int state = 0;
- 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++)
- {
- long x = GET_WORD(abfd, sym_pointer->e_strx);
- cache_ptr->symbol.the_bfd = abfd;
- if (x == 0)
- cache_ptr->symbol.name = "";
- else if (x >= 0 && x < string_size)
- cache_ptr->symbol.name = x + strings;
- else
- goto bailout;
-
- cache_ptr->symbol.value = GET_SWORD(abfd, sym_pointer->e_value);
- cache_ptr->desc = bfd_h_get_16(abfd, sym_pointer->e_desc);
- cache_ptr->other = bfd_h_get_8(abfd, sym_pointer->e_other);
- cache_ptr->type = bfd_h_get_8(abfd, sym_pointer->e_type);
- cache_ptr->symbol.udata = 0;
- translate_from_native_sym_flags (sym_pointer, cache_ptr,
- abfd, &state);
- }
- }
-
- obj_aout_symbols (abfd) = cached;
- free((PTR)syms);
-
- return true;
- }
-
-
- /* Possible improvements:
- + look for strings matching trailing substrings of other strings
- + better data structures? balanced trees?
- + smaller per-string or per-symbol data? re-use some of the symbol's
- data fields?
- + also look at reducing memory use elsewhere -- maybe if we didn't have to
- construct the entire symbol table at once, we could get by with smaller
- amounts of VM? (What effect does that have on the string table
- reductions?)
- + rip this out of here, put it into its own file in bfd or libiberty, so
- coff and elf can use it too. I'll work on this soon, but have more
- pressing tasks right now.
-
- A hash table might(?) be more efficient for handling exactly the cases that
- are handled now, but for trailing substring matches, I think we want to
- examine the `nearest' values (reverse-)lexically, not merely impose a strict
- order, nor look only for exact-match or not-match. I don't think a hash
- table would be very useful for that, and I don't feel like fleshing out two
- completely different implementations. [raeburn:930419.0331EDT] */
-
- #if __GNUC__ >= 2
- #define INLINE __inline__
- #else
- #define INLINE
- #endif
-
- struct stringtab_entry {
- /* Hash value for this string. Only useful so long as we aren't doing
- substring matches. */
- int hash;
-
- /* Next node to look at, depending on whether the hash value of the string
- being searched for is less than or greater than the hash value of the
- current node. For now, `equal to' is lumped in with `greater than', for
- space efficiency. It's not a common enough case to warrant another field
- to be used for all nodes. */
- struct stringtab_entry *less;
- struct stringtab_entry *greater;
-
- /* The string itself. */
- CONST char *string;
-
- /* The index allocated for this string. */
- bfd_size_type index;
-
- #ifdef GATHER_STATISTICS
- /* How many references have there been to this string? (Not currently used;
- could be dumped out for anaylsis, if anyone's interested.) */
- unsigned long count;
- #endif
-
- /* Next node in linked list, in suggested output order. */
- struct stringtab_entry *next_to_output;
- };
-
- struct stringtab_data {
- /* Tree of string table entries. */
- struct stringtab_entry *strings;
-
- /* Fudge factor used to center top node of tree. */
- int hash_zero;
-
- /* Next index value to issue. */
- bfd_size_type index;
-
- /* Index used for empty strings. Cached here because checking for them
- is really easy, and we can avoid searching the tree. */
- bfd_size_type empty_string_index;
-
- /* These fields indicate the two ends of a singly-linked list that indicates
- the order strings should be written out in. Use this order, and no
- seeking will need to be done, so output efficiency should be maximized. */
- struct stringtab_entry **end;
- struct stringtab_entry *output_order;
-
- #ifdef GATHER_STATISTICS
- /* Number of strings which duplicate strings already in the table. */
- unsigned long duplicates;
-
- /* Number of bytes saved by not having to write all the duplicate strings. */
- unsigned long bytes_saved;
-
- /* Number of zero-length strings. Currently, these all turn into
- references to the null byte at the end of the first string. In some
- cases (possibly not all? explore this...), it should be possible to
- simply write out a zero index value. */
- unsigned long empty_strings;
-
- /* Number of times the hash values matched but the strings were different.
- Note that this includes the number of times the other string(s) occurs, so
- there may only be two strings hashing to the same value, even if this
- number is very large. */
- unsigned long bad_hash_matches;
-
- /* Null strings aren't counted in this one.
- This will probably only be nonzero if we've got an input file
- which was produced by `ld -r' (i.e., it's already been processed
- through this code). Under some operating systems, native tools
- may make all empty strings have the same index; but the pointer
- check won't catch those, because to get to that stage we'd already
- have to compute the checksum, which requires reading the string,
- so we short-circuit that case with empty_string_index above. */
- unsigned long pointer_matches;
-
- /* Number of comparisons done. I figure with the algorithms in use below,
- the average number of comparisons done (per symbol) should be roughly
- log-base-2 of the number of unique strings. */
- unsigned long n_compares;
- #endif
- };
-
- /* Some utility functions for the string table code. */
-
- static INLINE int
- hash (string)
- char *string;
- {
- unsigned int sum = 0;
- while (*string)
- {
- #if 0
- /* This expression borrowed from some code in gnu make. */
- sum += *string++, sum = (sum << 7) + (sum >> 20);
- #endif
- /* This appears to get a better distribution, at least for my one
- test case. Do some analysis on this later, get a real hash
- algorithm. */
- sum ^= sum >> 20;
- sum ^= sum << 7;
- sum += *string++;
- }
- return sum;
- }
-
- static INLINE void
- stringtab_init (tab)
- struct stringtab_data *tab;
- {
- tab->strings = 0;
- tab->output_order = 0;
- tab->end = &tab->output_order;
-
- /* Initial string table length includes size of length field. */
- tab->index = BYTES_IN_WORD;
- tab->empty_string_index = -1;
- #ifdef GATHER_STATISTICS
- tab->duplicates = 0;
- tab->empty_strings = 0;
- tab->bad_hash_matches = 0;
- tab->pointer_matches = 0;
- tab->bytes_saved = 0;
- tab->n_compares = 0;
- #endif
- }
-
- static INLINE int
- compare (entry, str, hash)
- struct stringtab_entry *entry;
- CONST char *str;
- int hash;
- {
- if (hash == entry->hash)
- return 0;
- if (hash > entry->hash)
- return 1;
- if (hash < entry->hash)
- return -1;
- abort ();
- }
-
- #ifdef GATHER_STATISTICS
- /* Don't want to have to link in math library with all bfd applications... */
- static INLINE double
- log2 (num)
- int num;
- {
- double d = num;
- #if defined (__i386__) && __GNUC__ >= 2
- asm ("fyl2x" : "=t" (d) : "0" (d), "u" (1.0));
- return d;
- #else
- int n = 0;
- while (d >= 2.0)
- n++, d /= 2.0;
- return ((d > 1.41) ? 0.5 : 0) + n;
- #endif
- }
- #endif
-
- /* Main string table routines. */
- /* Returns index in string table. Whether or not this actually adds an
- entry into the string table should be irrelevant -- it just has to
- return a valid index. */
- static bfd_size_type
- add_to_stringtab (abfd, str, tab, check)
- bfd *abfd;
- CONST char *str;
- struct stringtab_data *tab;
- int check;
- {
- struct stringtab_entry **ep;
- struct stringtab_entry *entry;
- int hashval, len;
-
- if (str[0] == 0)
- {
- bfd_size_type index;
- CONST bfd_size_type minus_one = -1;
-
- #ifdef GATHER_STATISTICS
- tab->empty_strings++;
- #endif
- index = tab->empty_string_index;
- if (index != minus_one)
- {
- got_empty:
- #ifdef GATHER_STATISTICS
- tab->bytes_saved++;
- tab->duplicates++;
- #endif
- return index;
- }
-
- /* Need to find it. */
- entry = tab->strings;
- if (entry)
- {
- index = entry->index + strlen (entry->string);
- tab->empty_string_index = index;
- goto got_empty;
- }
- len = 0;
- }
- else
- len = strlen (str);
-
- /* The hash_zero value is chosen such that the first symbol gets a value of
- zero. With a balanced tree, this wouldn't be very useful, but without it,
- we might get a more even split at the top level, instead of skewing it
- badly should hash("/usr/lib/crt0.o") (or whatever) be far from zero. */
- hashval = hash (str) ^ tab->hash_zero;
- ep = &tab->strings;
- if (!*ep)
- {
- tab->hash_zero = hashval;
- hashval = 0;
- goto add_it;
- }
-
- while (*ep)
- {
- int cmp;
- entry = *ep;
- #ifdef GATHER_STATISTICS
- tab->n_compares++;
- #endif
- cmp = compare (entry, str, hashval);
- if (cmp == 0)
- {
- if (entry->string == str)
- {
- #ifdef GATHER_STATISTICS
- tab->pointer_matches++;
- #endif
- goto match;
- }
- if (!strcmp (entry->string, str))
- {
- match:
- #ifdef GATHER_STATISTICS
- entry->count++;
- tab->bytes_saved += len + 1;
- tab->duplicates++;
- #endif
- /* If we're in the linker, and the new string is from a new
- input file which might have already had these reductions
- run over it, we want to keep the new string pointer. I
- don't think we're likely to see any (or nearly as many,
- at least) cases where a later string is in the same location
- as an earlier one rather than this one. */
- entry->string = str;
- return entry->index;
- }
- #ifdef GATHER_STATISTICS
- tab->bad_hash_matches++;
- #endif
- ep = &entry->greater;
- }
- else if (cmp > 0)
- ep = &entry->greater;
- else
- /* cmp < 0 */
- ep = &entry->less;
- }
-
- /* If we get here, nothing that's in the table already matched.
- EP points to the `next' field at the end of the chain; stick a
- new entry on here. */
- add_it:
- entry = (struct stringtab_entry *) bfd_alloc_by_size_t (abfd,
- sizeof (struct stringtab_entry));
-
- entry->less = entry->greater = 0;
- entry->hash = hashval;
- entry->index = tab->index;
- entry->string = str;
- entry->next_to_output = 0;
- #ifdef GATHER_STATISTICS
- entry->count = 1;
- #endif
-
- assert (*tab->end == 0);
- *(tab->end) = entry;
- tab->end = &entry->next_to_output;
- assert (*tab->end == 0);
-
- {
- tab->index += len + 1;
- if (len == 0)
- tab->empty_string_index = entry->index;
- }
- assert (*ep == 0);
- *ep = entry;
- return entry->index;
- }
-
- static void
- emit_strtab (abfd, tab)
- bfd *abfd;
- struct stringtab_data *tab;
- {
- struct stringtab_entry *entry;
- #ifdef GATHER_STATISTICS
- int count = 0;
- #endif
-
- /* Be sure to put string length into correct byte ordering before writing
- it out. */
- char buffer[BYTES_IN_WORD];
-
- PUT_WORD (abfd, tab->index, (unsigned char *) buffer);
- bfd_write ((PTR) buffer, 1, BYTES_IN_WORD, abfd);
-
- for (entry = tab->output_order; entry; entry = entry->next_to_output)
- {
- bfd_write ((PTR) entry->string, 1, strlen (entry->string) + 1, abfd);
- #ifdef GATHER_STATISTICS
- count++;
- #endif
- }
-
- #ifdef GATHER_STATISTICS
- /* Short form only, for now.
- To do: Specify output file. Conditionalize on environment? Detailed
- analysis if desired. */
- {
- int n_syms = bfd_get_symcount (abfd);
-
- fprintf (stderr, "String table data for output file:\n");
- fprintf (stderr, " %8d symbols output\n", n_syms);
- fprintf (stderr, " %8d duplicate strings\n", tab->duplicates);
- fprintf (stderr, " %8d empty strings\n", tab->empty_strings);
- fprintf (stderr, " %8d unique strings output\n", count);
- fprintf (stderr, " %8d pointer matches\n", tab->pointer_matches);
- fprintf (stderr, " %8d bytes saved\n", tab->bytes_saved);
- fprintf (stderr, " %8d bad hash matches\n", tab->bad_hash_matches);
- fprintf (stderr, " %8d hash-val comparisons\n", tab->n_compares);
- if (n_syms)
- {
- double n_compares = tab->n_compares;
- double avg_compares = n_compares / n_syms;
- /* The second value here should usually be near one. */
- fprintf (stderr, "\t average %f per symbol (%f * log2 nstrings)\n",
- avg_compares, avg_compares / log2 (count));
- }
- }
- #endif
-
- /* Old code:
- unsigned int count;
- 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);
- }
- g->KEEPIT = (KEEPITTYPE) count;
- } */
- }
-
- void
- DEFUN(NAME(aout,write_syms),(abfd),
- bfd *abfd)
- {
- unsigned int count ;
- asymbol **generic = bfd_get_outsymbols (abfd);
- struct stringtab_data strtab;
-
- stringtab_init (&strtab);
-
- for (count = 0; count < bfd_get_symcount (abfd); count++)
- {
- asymbol *g = generic[count];
- struct external_nlist nsp;
-
- if (g->name)
- PUT_WORD (abfd, add_to_stringtab (abfd, g->name, &strtab),
- (unsigned char *) nsp.e_strx);
- else
- PUT_WORD (abfd, 0, (unsigned char *)nsp.e_strx);
-
- if (bfd_asymbol_flavour(g) == 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_NLIST_SIZE, abfd);
-
- /* NB: `KEEPIT' currently overlays `flags', so set this only
- here, at the end. */
- g->KEEPIT = count;
- }
-
- emit_strtab (abfd, &strtab);
- }
-
-
- 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;
- asymbol *sym = *(g->sym_ptr_ptr);
- int r_extern;
- unsigned int r_length;
- int r_pcrel;
- int r_baserel, r_jmptable, r_relative;
- unsigned int r_addend;
- asection *output_section = sym->section->output_section;
-
- 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 + (*(g->sym_ptr_ptr))->section->output_section->vma;
-
- /* name was clobbered by aout_write_syms to be symbol index */
-
- /* If this relocation is relative to a symbol then set the
- r_index to the symbols index, and the r_extern bit.
-
- Absolute symbols can come in in two ways, either as an offset
- from the abs section, or as a symbol which has an abs value.
- check for that here
- */
-
-
- if (bfd_is_com_section (output_section)
- || output_section == &bfd_abs_section
- || output_section == &bfd_und_section)
- {
- if (bfd_abs_section.symbol == sym)
- {
- /* Whoops, looked like an abs symbol, but is really an offset
- from the abs section */
- r_index = 0;
- r_extern = 0;
- }
- else
- {
- /* Fill in symbol */
- r_extern = 1;
- r_index = stoi((*(g->sym_ptr_ptr))->KEEPIT);
-
- }
- }
- else
- {
- /* Just an ordinary section */
- r_extern = 0;
- r_index = output_section->target_index;
- }
-
- /* 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;
- asymbol *sym = *(g->sym_ptr_ptr);
- asection *output_section = sym->section->output_section;
-
- PUT_WORD (abfd, g->address, natptr->r_address);
-
- r_type = (unsigned int) g->howto->type;
-
- r_addend = g->addend + (*(g->sym_ptr_ptr))->section->output_section->vma;
-
-
- /* If this relocation is relative to a symbol then set the
- r_index to the symbols index, and the r_extern bit.
-
- Absolute symbols can come in in two ways, either as an offset
- from the abs section, or as a symbol which has an abs value.
- check for that here
- */
-
- if (bfd_is_com_section (output_section)
- || output_section == &bfd_abs_section
- || output_section == &bfd_und_section)
- {
- if (bfd_abs_section.symbol == sym)
- {
- /* Whoops, looked like an abs symbol, but is really an offset
- from the abs section */
- r_index = 0;
- r_extern = 0;
- }
- else
- {
- r_extern = 1;
- r_index = stoi((*(g->sym_ptr_ptr))->KEEPIT);
- }
- }
- else
- {
- /* Just an ordinary section */
- r_extern = 0;
- r_index = output_section->target_index;
- }
-
-
- /* 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);
- }
-
- /* BFD deals internally with all things based from the section they're
- in. so, something in 10 bytes into a text section with a base of
- 50 would have a symbol (.text+10) and know .text vma was 50.
-
- Aout keeps all it's symbols based from zero, so the symbol would
- contain 60. This macro subs the base of each section from the value
- to give the true offset from the section */
-
-
- #define MOVE_ADDRESS(ad) \
- if (r_extern) { \
- /* undefined symbol */ \
- cache_ptr->sym_ptr_ptr = symbols + r_index; \
- cache_ptr->addend = ad; \
- } else { \
- /* defined, section relative. replace symbol with pointer to \
- symbol which points to section */ \
- switch (r_index) { \
- case N_TEXT: \
- case N_TEXT | N_EXT: \
- cache_ptr->sym_ptr_ptr = obj_textsec(abfd)->symbol_ptr_ptr; \
- cache_ptr->addend = ad - su->textsec->vma; \
- break; \
- case N_DATA: \
- case N_DATA | N_EXT: \
- cache_ptr->sym_ptr_ptr = obj_datasec(abfd)->symbol_ptr_ptr; \
- cache_ptr->addend = ad - su->datasec->vma; \
- break; \
- case N_BSS: \
- case N_BSS | N_EXT: \
- cache_ptr->sym_ptr_ptr = obj_bsssec(abfd)->symbol_ptr_ptr; \
- cache_ptr->addend = ad - su->bsssec->vma; \
- break; \
- default: \
- case N_ABS: \
- case N_ABS | N_EXT: \
- cache_ptr->sym_ptr_ptr = bfd_abs_section.symbol_ptr_ptr; \
- cache_ptr->addend = ad; \
- 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 = &(abfd->tdata.aout_data->a);
-
- 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 = &(abfd->tdata.aout_data->a);
-
- 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_type how)
- {
- FILE *file = (FILE *)afile;
-
- switch (how) {
- case bfd_print_symbol_name:
- if (symbol->name)
- fprintf(file,"%s", symbol->name);
- break;
- case bfd_print_symbol_more:
- 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:
- {
- CONST char *section_name = 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));
- if (symbol->name)
- fprintf(file," %s", symbol->name);
- }
- break;
- case bfd_print_symbol_nm:
- {
- int section_code = bfd_decode_symclass (symbol);
-
- if (section_code == 'U')
- fprintf(file, " ");
- else
- fprintf_vma(file, symbol->value+symbol->section->vma);
- if (section_code == '?')
- {
- int type_code = aout_symbol(symbol)->type & 0xff;
- CONST char *stab_name = aout_stab_name(type_code);
- char buf[10];
- if (stab_name == NULL)
- {
- sprintf(buf, "(%d)", type_code);
- stab_name = buf;
- }
- fprintf(file," - %02x %04x %5s",
- (unsigned)(aout_symbol(symbol)->other & 0xff),
- (unsigned)(aout_symbol(symbol)->desc & 0xffff),
- stab_name);
- }
- else
- fprintf(file," %c", section_code);
- 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];
- static char filename_buffer[200];
- CONST char *directory_name = NULL;
- CONST char *main_file_name = NULL;
- CONST char *current_file_name = NULL;
- CONST char *line_file_name = NULL; /* Value of current_file_name at line number. */
- 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);
- next:
- switch (q->type){
- case N_SO:
- main_file_name = current_file_name = q->symbol.name;
- /* Look ahead to next symbol to check if that too is an N_SO. */
- p++;
- if (*p == NULL)
- break;
- q = (aout_symbol_type *)(*p);
- if (q->type != (int)N_SO)
- goto next;
-
- /* Found a second N_SO First is directory; second is filename. */
- directory_name = current_file_name;
- main_file_name = current_file_name = q->symbol.name;
- if (obj_textsec(abfd) != section)
- goto done;
- break;
- case N_SOL:
- current_file_name = q->symbol.name;
- 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;
- line_file_name = current_file_name;
- }
- 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 = '\0'; }
- *functionname_ptr = buffer;
- goto done;
-
- }
- }
- break;
- }
- }
- }
-
- done:
- if (*line_ptr)
- main_file_name = line_file_name;
- if (main_file_name) {
- if (main_file_name[0] == '/' || directory_name == NULL)
- *filename_ptr = main_file_name;
- else {
- sprintf(filename_buffer, "%.140s%.50s",
- directory_name, main_file_name);
- *filename_ptr = filename_buffer;
- }
- }
- return true;
-
- }
-
- int
- DEFUN(NAME(aout,sizeof_headers),(abfd, execable),
- bfd *abfd AND
- boolean execable)
- {
- return adata(abfd).exec_bytes_size;
- }
-