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- /* Generic BFD library interface and support routines.
- 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. */
-
- /* $Id: bfd.c,v 1.30 1991/10/17 06:05:18 gnu Exp $ */
-
- /*proto*
- @section @code{typedef bfd}
-
- A BFD is has type @code{bfd}; objects of this type are the cornerstone
- of any application using @code{libbfd}. References though the BFD and
- to data in the BFD give the entire BFD functionality.
-
- Here is the struct used to define the type @code{bfd}. This contains
- the major data about the file, and contains pointers to the rest of
- the data.
-
- *+++
-
- $struct _bfd
- ${
- The filename the application opened the BFD with.
-
- $ CONST char *filename;
-
- A pointer to the target jump table.
-
- $ struct bfd_target *xvec;
-
-
- To avoid dragging too many header files into every file that
- includes @file{bfd.h}, IOSTREAM has been declared as a "char *", and MTIME
- as a "long". Their correct types, to which they are cast when used,
- are "FILE *" and "time_t".
-
- The iostream is the result of an fopen on the filename.
-
- $ char *iostream;
-
- Is the file being cached @xref{File Caching}.
-
- $ boolean cacheable;
-
- Marks whether there was a default target specified when the BFD was
- opened. This is used to select what matching algorithm to use to chose
- the back end.
-
- $ boolean target_defaulted;
-
- The caching routines use these to maintain a least-recently-used list of
- BFDs (@pxref{File Caching}).
-
- $ struct _bfd *lru_prev, *lru_next;
-
- When a file is closed by the caching routines, BFD retains state
- information on the file here:
-
- $ file_ptr where;
-
- and here:
-
- $ boolean opened_once;
-
- $ boolean mtime_set;
- File modified time
-
- $ long mtime;
-
- Reserved for an unimplemented file locking extension.
-
- $int ifd;
-
- The format which belongs to the BFD.
-
- $ bfd_format format;
-
- The direction the BFD was opened with
-
- $ enum bfd_direction {no_direction = 0,
- $ read_direction = 1,
- $ write_direction = 2,
- $ both_direction = 3} direction;
-
- Format_specific flags
-
- $ flagword flags;
-
- Currently my_archive is tested before adding origin to anything. I
- believe that this can become always an add of origin, with origin set
- to 0 for non archive files.
-
- $ file_ptr origin;
-
- Remember when output has begun, to stop strange things happening.
-
- $ boolean output_has_begun;
-
- Pointer to linked list of sections
-
- $ struct sec *sections;
-
- The number of sections
-
- $ unsigned int section_count;
-
- Stuff only useful for object files:
- The start address.
-
- $ bfd_vma start_address;
- Used for input and output
-
- $ unsigned int symcount;
- Symbol table for output BFD
-
- $ struct symbol_cache_entry **outsymbols;
-
- Pointer to structure which contains architecture information
-
- $ struct bfd_arch_info *arch_info;
-
- Stuff only useful for archives:
-
- $ PTR arelt_data;
- $ struct _bfd *my_archive;
- $ struct _bfd *next;
- $ struct _bfd *archive_head;
- $ boolean has_armap;
-
- Used by the back end to hold private data.
-
- $ PTR tdata;
-
- Used by the application to hold private data
-
- $ PTR usrdata;
-
- Where all the allocated stuff under this BFD goes (@pxref{Memory Usage}).
-
- $ struct obstack memory;
- $};
-
- *---
-
- */
- #include "bfd.h"
- #include "sysdep.h"
- #include "libbfd.h"
-
- #undef strerror
- extern char *strerror();
-
-
- short _bfd_host_big_endian = 0x0100;
- /* Accessing the above as (*(char*)&_bfd_host_big_endian), will
- return 1 if the host is big-endian, 0 otherwise.
- (assuming that a short is two bytes long!!! FIXME)
- (See HOST_IS_BIG_ENDIAN_P in bfd.h.) */
-
- /** Error handling
- o - Most functions return nonzero on success (check doc for
- precise semantics); 0 or NULL on error.
- o - Internal errors are documented by the value of bfd_error.
- If that is system_call_error then check errno.
- o - The easiest way to report this to the user is to use bfd_perror.
- */
-
- bfd_ec bfd_error = no_error;
-
- char *bfd_errmsgs[] = { "No error",
- "System call error",
- "Invalid target",
- "File in wrong format",
- "Invalid operation",
- "Memory exhausted",
- "No symbols",
- "No relocation info",
- "No more archived files",
- "Malformed archive",
- "Symbol not found",
- "File format not recognized",
- "File format is ambiguous",
- "Section has no contents",
- "Nonrepresentable section on output",
- "#<Invalid error code>"
- };
-
- static
- void
- DEFUN(bfd_nonrepresentable_section,(abfd, name),
- CONST bfd * CONST abfd AND
- CONST char * CONST name)
- {
- printf("bfd error writing file %s, format %s can't represent section %s\n",
- abfd->filename,
- abfd->xvec->name,
- name);
- exit(1);
- }
-
- bfd_error_vector_type bfd_error_vector =
- {
- bfd_nonrepresentable_section
- };
-
- char *
- bfd_errmsg (error_tag)
- bfd_ec error_tag;
- {
- #ifndef errno
- extern int errno;
- #endif
- if (error_tag == system_call_error)
- return strerror (errno);
-
- if ((((int)error_tag <(int) no_error) ||
- ((int)error_tag > (int)invalid_error_code)))
- error_tag = invalid_error_code;/* sanity check */
-
- return bfd_errmsgs [(int)error_tag];
- }
-
-
- void bfd_default_error_trap(error_tag)
- bfd_ec error_tag;
- {
- printf("bfd assert fail (%s)\n", bfd_errmsg(error_tag));
- }
-
- void (*bfd_error_trap)() = bfd_default_error_trap;
- void (*bfd_error_nonrepresentabltrap)() = bfd_default_error_trap;
-
- void
- DEFUN(bfd_perror,(message),
- CONST char *message)
- {
- if (bfd_error == system_call_error)
- perror((char *)message); /* must be system error then... */
- else {
- if (message == NULL || *message == '\0')
- fprintf (stderr, "%s\n", bfd_errmsg (bfd_error));
- else
- fprintf (stderr, "%s: %s\n", message, bfd_errmsg (bfd_error));
- }
- }
-
-
- /** Symbols */
-
- /* returns the number of octets of storage required */
-
- unsigned int
- get_reloc_upper_bound (abfd, asect)
- bfd *abfd;
- sec_ptr asect;
- {
- if (abfd->format != bfd_object) {
- bfd_error = invalid_operation;
- return 0;
- }
-
- return BFD_SEND (abfd, _get_reloc_upper_bound, (abfd, asect));
- }
-
- unsigned int
- bfd_canonicalize_reloc (abfd, asect, location, symbols)
- bfd *abfd;
- sec_ptr asect;
- arelent **location;
- asymbol **symbols;
- {
- if (abfd->format != bfd_object) {
- bfd_error = invalid_operation;
- return 0;
- }
-
- return BFD_SEND (abfd, _bfd_canonicalize_reloc, (abfd, asect, location, symbols));
- }
-
-
- boolean
- bfd_set_file_flags (abfd, flags)
- bfd *abfd;
- flagword flags;
- {
- if (abfd->format != bfd_object) {
- bfd_error = wrong_format;
- return false;
- }
-
- if (bfd_read_p (abfd)) {
- bfd_error = invalid_operation;
- return false;
- }
-
- if ((flags & bfd_applicable_file_flags (abfd)) != flags) {
- bfd_error = invalid_operation;
- return false;
- }
-
- bfd_get_file_flags (abfd) = flags;
- return true;
- }
-
-
- void
- bfd_set_reloc (ignore_abfd, asect, location, count)
- bfd *ignore_abfd;
- sec_ptr asect;
- arelent **location;
- unsigned int count;
- {
- asect->orelocation = location;
- asect->reloc_count = count;
- }
-
- void
- bfd_assert(file, line)
- char *file;
- int line;
- {
- printf("bfd assertion fail %s:%d\n",file,line);
- }
-
-
- /*proto* bfd_set_start_address
-
- Marks the entry point of an output BFD. Returns @code{true} on
- success, @code{false} otherwise.
-
- *; PROTO(boolean, bfd_set_start_address,(bfd *, bfd_vma));
- */
-
- boolean
- bfd_set_start_address(abfd, vma)
- bfd *abfd;
- bfd_vma vma;
- {
- abfd->start_address = vma;
- return true;
- }
-
-
- /*proto* bfd_get_mtime
-
- Return cached file modification time (e.g. as read from archive header
- for archive members, or from file system if we have been called
- before); else determine modify time, cache it, and return it.
-
- *; PROTO(long, bfd_get_mtime, (bfd *));
-
- */
-
- long
- bfd_get_mtime (abfd)
- bfd *abfd;
- {
- FILE *fp;
- struct stat buf;
-
- if (abfd->mtime_set)
- return abfd->mtime;
-
- fp = bfd_cache_lookup (abfd);
- if (0 != fstat (fileno (fp), &buf))
- return 0;
-
- abfd->mtime_set = true;
- abfd->mtime = buf.st_mtime;
- return abfd->mtime;
- }
-
- /*proto* stuff
-
- *+
-
- #define bfd_sizeof_headers(abfd, reloc) \
- BFD_SEND (abfd, _bfd_sizeof_headers, (abfd, reloc))
-
- #define bfd_find_nearest_line(abfd, section, symbols, offset, filename_ptr, func, line_ptr) \
- BFD_SEND (abfd, _bfd_find_nearest_line, (abfd, section, symbols, offset, filename_ptr, func, line_ptr))
-
- #define bfd_debug_info_start(abfd) \
- BFD_SEND (abfd, _bfd_debug_info_start, (abfd))
-
- #define bfd_debug_info_end(abfd) \
- BFD_SEND (abfd, _bfd_debug_info_end, (abfd))
-
- #define bfd_debug_info_accumulate(abfd, section) \
- BFD_SEND (abfd, _bfd_debug_info_accumulate, (abfd, section))
-
- #define bfd_stat_arch_elt(abfd, stat) \
- BFD_SEND (abfd, _bfd_stat_arch_elt,(abfd, stat))
-
- #define bfd_coff_swap_aux_in(a,e,t,c,i) \
- BFD_SEND (a, _bfd_coff_swap_aux_in, (a,e,t,c,i))
-
- #define bfd_coff_swap_sym_in(a,e,i) \
- BFD_SEND (a, _bfd_coff_swap_sym_in, (a,e,i))
-
- #define bfd_coff_swap_lineno_in(a,e,i) \
- BFD_SEND ( a, _bfd_coff_swap_lineno_in, (a,e,i))
-
- #define bfd_set_arch_mach(abfd, arch, mach)\
- BFD_SEND ( abfd, _bfd_set_arch_mach, (abfd, arch, mach))
-
- #define bfd_coff_swap_reloc_out(abfd, i, o) \
- BFD_SEND (abfd, _bfd_coff_swap_reloc_out, (abfd, i, o))
-
- #define bfd_coff_swap_lineno_out(abfd, i, o) \
- BFD_SEND (abfd, _bfd_coff_swap_lineno_out, (abfd, i, o))
-
- #define bfd_coff_swap_aux_out(abfd, i, t,c,o) \
- BFD_SEND (abfd, _bfd_coff_swap_aux_out, (abfd, i,t,c, o))
-
- #define bfd_coff_swap_sym_out(abfd, i,o) \
- BFD_SEND (abfd, _bfd_coff_swap_sym_out, (abfd, i, o))
-
- #define bfd_coff_swap_scnhdr_out(abfd, i,o) \
- BFD_SEND (abfd, _bfd_coff_swap_scnhdr_out, (abfd, i, o))
-
- #define bfd_coff_swap_filehdr_out(abfd, i,o) \
- BFD_SEND (abfd, _bfd_coff_swap_filehdr_out, (abfd, i, o))
-
- #define bfd_coff_swap_aouthdr_out(abfd, i,o) \
- BFD_SEND (abfd, _bfd_coff_swap_aouthdr_out, (abfd, i, o))
-
- *-
-
- */
-
-
-
-
-
-
-