472 lines
12 KiB
C
472 lines
12 KiB
C
/* Copyright (C) 1990, 1991 Free Software Foundation, Inc.
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This file is part of BFD, the Binary File Diddler.
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BFD is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 1, or (at your option)
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any later version.
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BFD is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with BFD; see the file COPYING. If not, write to
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the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
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/*
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bfd backend for srecord objects.
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Srecords cannot hold anything but addresses and data, so that's all
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that we impliment.
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The only interesting thing is that srecords may come out of order and
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there is no header, so an initial scan is required to discover the
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minimum and maximum addresses used to create the vma and size of the
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only section we create. We arbitarily call this section ".text".
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When bfd_get_section_contents is called the file is read again, and
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this time the data is placed into a malloced area.
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Any number of sections may be created for output, we just output them
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in the order provided to bfd_set_section_contents.
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Steve Chamberlain steve@cygnus.com
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*/
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/* $Id$
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* $Log$
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* Revision 1.2 1991/04/03 22:10:51 steve
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* Fixed typo
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*
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* Revision 1.1.1.1 1991/03/21 21:11:22 gumby
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* Back from Intel with Steve
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*
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* Revision 1.1 1991/03/21 21:11:20 gumby
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* Initial revision
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*
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* Revision 1.1 1991/03/13 00:22:29 chrisb
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* Initial revision
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*
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* Revision 1.3 1991/03/10 19:11:40 rich
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* Modified Files:
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* bfd.c coff-code.h libbfd.c libbfd.h srec.c sunos.c
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*
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* Working bugs out of coff support.
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*
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* Revision 1.2 1991/03/07 02:26:18 sac
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* Tidied up xfer table
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*
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* Revision 1.1 1991/03/05 16:28:12 sac
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* Initial revision
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*
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*/
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#include "sysdep.h"
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#include "bfd.h"
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#include "libbfd.h"
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static char digs[] = "0123456789ABCDEF";
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/* Macros for converting between hex and binary */
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#define NIBBLE(x) ((x >= '0' && x <= '9') ? (x - '0') : (x - 'A' + 10))
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#define HEX(buffer) ((NIBBLE((buffer)->high) <<4) + NIBBLE((buffer)->low))
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#define TOHEX(d,x) \
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((d)->low = digs[(x) & 0xf], (d)->high = digs[((x)>>4)&0xf], x)
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typedef struct {
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char high;
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char low;
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} byte_as_two_char_type;
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/* The maximum number of bytes on a line is FF */
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#define MAXCHUNK 0xff
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/* The number of bytes we fit onto a line on output */
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#define CHUNK 16
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/* The shape of an srecord .. */
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typedef struct
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{
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char S;
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char type;
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byte_as_two_char_type size;
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union {
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struct {
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byte_as_two_char_type address[4];
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byte_as_two_char_type data[MAXCHUNK];
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/* If there isn't MAXCHUNK bytes of data then the checksum will
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appear earlier */
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byte_as_two_char_type checksum;
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char nl;
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} type_3;
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struct {
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byte_as_two_char_type address[4];
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byte_as_two_char_type data[MAXCHUNK];
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byte_as_two_char_type checksum;
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char nl;
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} type_6;
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struct {
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byte_as_two_char_type address[3];
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byte_as_two_char_type data[MAXCHUNK];
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byte_as_two_char_type checksum;
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char nl;
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} type_2;
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struct {
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byte_as_two_char_type address[2];
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byte_as_two_char_type data[MAXCHUNK];
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byte_as_two_char_type checksum;
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char nl;
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} type_1;
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byte_as_two_char_type data[MAXCHUNK];
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} u;
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} srec_type;
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/*
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called once per input srecord, used to work out vma and size of data.
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*/
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static void
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size_srec(abfd, section, address, raw, length)
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bfd *abfd;
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asection *section;
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bfd_vma address;
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byte_as_two_char_type *raw;
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unsigned int length;
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{
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if (address < section->vma)
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section->vma = address;
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if (address + length > section->vma + section->size)
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section->size = (address+length) - section->vma;
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}
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/*
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called once per input srecord, copies data from input into malloced area
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*/
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static void
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fillup(abfd, section, address, raw, length)
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bfd *abfd;
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asection *section;
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bfd_vma address;
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byte_as_two_char_type *raw;
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unsigned int length;
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{
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unsigned int i;
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bfd_byte *dst = (bfd_byte *)(section->used_by_bfd) + address - section->vma;
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for (i = 0; i < length; i++) {
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*dst = HEX(raw);
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dst++;
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raw++;
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}
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}
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/*
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pass over an srecord file calling one of the above functions on each
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record
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*/
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static void
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pass_over(abfd, func, section)
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bfd *abfd;
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void (*func)();
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asection *section;
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{
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unsigned int bytes_on_line;
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boolean eof = false;
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bfd_vma address;
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/* To the front of the file */
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bfd_seek(abfd, (file_ptr)0, SEEK_SET);
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while (eof == false)
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{
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srec_type buffer;
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/* Find first 'S' */
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eof = bfd_read(&buffer.S, 1, 1, abfd) != 1;
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while (buffer.S != 'S' && !eof) {
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eof = bfd_read(&buffer.S, 1, 1, abfd) != 1;
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}
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if (eof) break;
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bfd_read(&buffer.type, 1, 3, abfd);
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bytes_on_line = HEX(&buffer.size);
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bfd_read(buffer.u.data, 1 , bytes_on_line * 2, abfd);
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switch (buffer.type) {
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case '6':
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/* Prologue - ignore */
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break;
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case '3':
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address = (HEX(buffer.u.type_3.address+0) << 24)
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+ (HEX(buffer.u.type_3.address+1) << 16)
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+ (HEX(buffer.u.type_3.address+2) << 8)
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+ (HEX(buffer.u.type_3.address+3));
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func(abfd,section, address, buffer.u.type_2.data, bytes_on_line -1);
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break;
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case '2':
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address = (HEX(buffer.u.type_2.address+0) << 16)+
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(HEX(buffer.u.type_2.address+1) << 8) +
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(HEX(buffer.u.type_2.address+2));
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func(abfd,section, address, buffer.u.type_2.data, bytes_on_line -1);
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break;
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case '1':
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address =
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(HEX(buffer.u.type_1.address+0) << 8)
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+ (HEX(buffer.u.type_1.address+1));
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func(abfd, section, address, buffer.u.type_1.data, bytes_on_line -1);
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break;
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}
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}
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}
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bfd_target *
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srec_object_p (abfd)
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bfd *abfd;
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{
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char b;
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asection *section;
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bfd_seek(abfd, (file_ptr)0, SEEK_SET);
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bfd_read(&b, 1,1,abfd);
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if (b != 'S') return (bfd_target*)NULL;
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/*
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We create one section called data for all the contents,
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and allocate enough room for the entire file
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*/
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section = bfd_make_section(abfd, ".text");
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section->size = 0;
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section->vma = 0xffffffff;
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pass_over(abfd, size_srec, section);
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return abfd->xvec;
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}
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static boolean
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srec_get_section_contents (abfd, section, location, offset, count)
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bfd *abfd;
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sec_ptr section;
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void *location;
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file_ptr offset;
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unsigned int count;
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{
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if (section->used_by_bfd == (bfd_byte *)NULL) {
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section->used_by_bfd = (bfd_byte *)malloc(section->size);
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pass_over(abfd, fillup, section);
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}
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(void) memcpy(location, (bfd_byte *)(section->used_by_bfd) + offset, count);
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return true;
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}
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boolean
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srec_set_arch_mach (abfd, arch, machine)
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bfd *abfd;
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enum bfd_architecture arch;
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unsigned long machine;
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{
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abfd->obj_arch = arch;
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abfd->obj_machine = machine;
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return true;
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}
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boolean
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srec_set_section_contents (abfd, section, location, offset, bytes_to_do)
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bfd *abfd;
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sec_ptr section;
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unsigned char *location;
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file_ptr offset;
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int bytes_to_do;
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{
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bfd_vma address;
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int bytes_written;
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int type;
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unsigned int i;
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srec_type buffer;
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bytes_written = 0;
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if (section->size <= 0xffff)
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type = 1;
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else if (section->size <= 0xffffff)
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type = 2;
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else
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type = 3;
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buffer.S = 'S';
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buffer.type = '0' + type;
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while (bytes_written < bytes_to_do) {
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unsigned int size;
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unsigned int check_sum;
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byte_as_two_char_type *data;
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unsigned int bytes_this_chunk = bytes_to_do - bytes_written;
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if (bytes_this_chunk > CHUNK) {
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bytes_this_chunk = CHUNK;
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}
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address = section->vma + offset + bytes_written;
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switch (type) {
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case 3:
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check_sum = TOHEX(buffer.u.type_3.address, address >> 24);
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check_sum += TOHEX(buffer.u.type_3.address+1, address >> 16);
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check_sum += TOHEX(buffer.u.type_3.address+2, address >> 8);
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check_sum += TOHEX(buffer.u.type_3.address+3, address >> 0);
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size = bytes_this_chunk + 5;
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data = buffer.u.type_3.data;
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case 2:
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check_sum = TOHEX(buffer.u.type_3.address, address >> 16);
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check_sum += TOHEX(buffer.u.type_3.address+1, address >> 8);
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check_sum += TOHEX(buffer.u.type_3.address+2, address >> 0);
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size = bytes_this_chunk + 4;
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data = buffer.u.type_2.data;
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break;
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case 1:
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check_sum = TOHEX(buffer.u.type_3.address+0, address >> 8);
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check_sum += TOHEX(buffer.u.type_3.address+1, address >> 0);
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size = bytes_this_chunk + 3;
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data = buffer.u.type_1.data;
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}
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for (i = 0; i < bytes_this_chunk; i++) {
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check_sum += TOHEX(data, (location[i]));
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data++;
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}
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check_sum += TOHEX(&(buffer.size), size );
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(void) TOHEX(data, ~check_sum);
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data++;
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* ( (char *)(data)) = '\n';
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bfd_write(&buffer, 1, (char *)data - (char *)&buffer + 1 , abfd);
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bytes_written += bytes_this_chunk;
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location += bytes_this_chunk;
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}
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return true;
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}
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boolean
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srec_close_and_cleanup (abfd)
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bfd *abfd;
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{
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asection *s;
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if (bfd_read_p (abfd) == false) {
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switch (abfd->format) {
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case bfd_archive:
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if (!_bfd_write_archive_contents (abfd)) {
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return false;
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}
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break;
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case bfd_object:
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bfd_write("S9030000FC\n", 1,11,abfd);
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break;
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default:
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bfd_error = invalid_operation;
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return false;
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}
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}
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for (s = abfd->sections; s != (asection *)NULL;s = s->next) {
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if (s->used_by_bfd != (void *)NULL) {
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free(s->used_by_bfd);
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}
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}
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return true;
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}
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/*SUPPRESS 460 */
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bfd_target srec_vec =
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{
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"srec", /* name */
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bfd_target_srec_flavour_enum,
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true, /* target byte order */
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true, /* target headers byte order */
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(HAS_RELOC | EXEC_P | /* object flags */
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HAS_LINENO | HAS_DEBUG |
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HAS_SYMS | HAS_LOCALS | DYNAMIC | WP_TEXT | D_PAGED),
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(SEC_CODE|SEC_DATA|SEC_ROM
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|SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
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0, /* valid reloc types */
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' ', /* ar_pad_char */
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16, /* ar_max_namelen */
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srec_close_and_cleanup, /* _close_and_cleanup */
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srec_set_section_contents, /* bfd_set_section_contents */
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srec_get_section_contents,
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bfd_true, /* new_section_hook */
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0, /* _core_file_failing_command */
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0, /* _core_file_failing_signal */
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0, /* _core_file_matches_ex...p */
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bfd_false, /* bfd_slurp_armap */
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bfd_false, /* bfd_slurp_extended_name_table */
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bfd_void, /* bfd_truncate_arname */
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bfd_0u, /* get_symtab_upper_bound */
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bfd_0u, /* canonicalize_symtab */
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bfd_void, /* bfd_reclaim_symbol_table */
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bfd_0u, /* get_reloc_upper_bound */
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bfd_0u, /* bfd_canonicalize_reloc */
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bfd_void, /* bfd_reclaim_reloc */
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bfd_0, /* bfd_get_symcount_upper_bound */
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(symindex (*)())bfd_0, /* bfd_get_first_symbol */
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(symindex (*)())bfd_0, /* bfd_get_next_symbol */
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bfd_false, /* bfd_classify_symbol */
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bfd_false, /* bfd_symbol_hasclass */
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(char* (*)())bfd_0, /* bfd_symbol_name */
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bfd_0, /* bfd_symbol_value */
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_do_getblong, _do_putblong, _do_getbshort, _do_putbshort, /* data */
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_do_getblong, _do_putblong, _do_getbshort, _do_putbshort, /* hdrs */
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{_bfd_dummy_target,
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srec_object_p, /* bfd_check_format */
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(struct bfd_target *(*)()) bfd_nullvoidptr,
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(struct bfd_target *(*)()) bfd_nullvoidptr,
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},
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{
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bfd_false,
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bfd_true, /* mkobject */
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_bfd_generic_mkarchive,
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bfd_false,
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},
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(asymbol * (*)()) bfd_nullvoidptr, /* bfd_make_empty_symbol */
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bfd_void, /* bfd_prit_symbol */
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(alent *(*)())bfd_nullvoidptr, /* srec_get_lineno,*/
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srec_set_arch_mach, /* bfd_set_arch_mach,*/
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bfd_false, /* write_armap*/
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(bfd *(*)())bfd_nullvoidptr, /* openr_next_archived_file */
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bfd_false, /* bfd_find_nearest_line */
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};
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