/* Copyright (C) 1990, 1991 Free Software Foundation, Inc. This file is part of BFD, the Binary File Diddler. BFD 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 1, or (at your option) any later version. BFD 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 BFD; see the file COPYING. If not, write to the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ /* bfd backend for srecord objects. Srecords cannot hold anything but addresses and data, so that's all that we impliment. The only interesting thing is that srecords may come out of order and there is no header, so an initial scan is required to discover the minimum and maximum addresses used to create the vma and size of the only section we create. We arbitarily call this section ".text". When bfd_get_section_contents is called the file is read again, and this time the data is placed into a bfd_alloc'd area. Any number of sections may be created for output, we just output them in the order provided to bfd_set_section_contents. Steve Chamberlain steve@cygnus.com */ #include #include "bfd.h" #include "libbfd.h" static char digs[] = "0123456789ABCDEF"; /* Macros for converting between hex and binary */ #define NIBBLE(x) ((x >= '0' && x <= '9') ? (x - '0') : (x - 'A' + 10)) #define HEX(buffer) ((NIBBLE((buffer)->high) <<4) + NIBBLE((buffer)->low)) #define TOHEX(d,x) \ ((d)->low = digs[(x) & 0xf], (d)->high = digs[((x)>>4)&0xf], x) typedef struct { char high; char low; } byte_as_two_char_type; /* The maximum number of bytes on a line is FF */ #define MAXCHUNK 0xff /* The number of bytes we fit onto a line on output */ #define CHUNK 16 /* The shape of an srecord .. */ typedef struct { char S; char type; byte_as_two_char_type size; union { struct { byte_as_two_char_type address[4]; byte_as_two_char_type data[MAXCHUNK]; /* If there isn't MAXCHUNK bytes of data then the checksum will appear earlier */ byte_as_two_char_type checksum; char nl; } type_3; struct { byte_as_two_char_type address[4]; byte_as_two_char_type data[MAXCHUNK]; byte_as_two_char_type checksum; char nl; } type_6; struct { byte_as_two_char_type address[3]; byte_as_two_char_type data[MAXCHUNK]; byte_as_two_char_type checksum; char nl; } type_2; struct { byte_as_two_char_type address[2]; byte_as_two_char_type data[MAXCHUNK]; byte_as_two_char_type checksum; char nl; } type_1; byte_as_two_char_type data[MAXCHUNK]; } u; } srec_type; #define enda(x) (x->vma + x->size) /* called once per input srecord, used to work out vma and size of data. */ static bfd_vma low,high; static void size_srec(abfd, section, address, raw, length) bfd *abfd; asection *section; bfd_vma address; byte_as_two_char_type *raw; unsigned int length; { if (address < low) low = address; if (address + length > high) high = address + length; } /* called once per input srecord, copies data from input into bfd_alloc'd area */ static void fillup(abfd, section, address, raw, length) bfd *abfd; asection *section; bfd_vma address; byte_as_two_char_type *raw; unsigned int length; { unsigned int i; bfd_byte *dst = (bfd_byte *)(section->used_by_bfd) + address - section->vma; for (i = 0; i < length; i++) { *dst = HEX(raw); dst++; raw++; } } /* pass over an srecord file calling one of the above functions on each record */ static void pass_over(abfd, func, section) bfd *abfd; void (*func)(); asection *section; { unsigned int bytes_on_line; boolean eof = false; bfd_vma address; /* To the front of the file */ bfd_seek(abfd, (file_ptr)0, SEEK_SET); while (eof == false) { srec_type buffer; /* Find first 'S' */ eof = bfd_read(&buffer.S, 1, 1, abfd) != 1; while (buffer.S != 'S' && !eof) { eof = bfd_read(&buffer.S, 1, 1, abfd) != 1; } if (eof) break; bfd_read(&buffer.type, 1, 3, abfd); bytes_on_line = HEX(&buffer.size); bfd_read((PTR)buffer.u.data, 1 , bytes_on_line * 2, abfd); switch (buffer.type) { case '6': /* Prologue - ignore */ break; case '3': address = (HEX(buffer.u.type_3.address+0) << 24) + (HEX(buffer.u.type_3.address+1) << 16) + (HEX(buffer.u.type_3.address+2) << 8) + (HEX(buffer.u.type_3.address+3)); func(abfd,section, address, buffer.u.type_3.data, bytes_on_line -1); break; case '2': address = (HEX(buffer.u.type_2.address+0) << 16)+ (HEX(buffer.u.type_2.address+1) << 8) + (HEX(buffer.u.type_2.address+2)); func(abfd,section, address, buffer.u.type_2.data, bytes_on_line -1); break; case '1': address = (HEX(buffer.u.type_1.address+0) << 8) + (HEX(buffer.u.type_1.address+1)); func(abfd, section, address, buffer.u.type_1.data, bytes_on_line -1); break; } } } bfd_target * srec_object_p (abfd) bfd *abfd; { char b; asection *section; bfd_seek(abfd, (file_ptr)0, SEEK_SET); bfd_read(&b, 1,1,abfd); if (b != 'S') return (bfd_target*)NULL; /* We create one section called data for all the contents, and allocate enough room for the entire file */ section = bfd_make_section(abfd, ".text"); section->size = 0; section->vma = 0xffffffff; low = 0xffffffff; high = 0; pass_over(abfd, size_srec, section); section->size = high - low; section->vma = low; return abfd->xvec; } static boolean srec_get_section_contents (abfd, section, location, offset, count) bfd *abfd; sec_ptr section; void *location; file_ptr offset; unsigned int count; { if (section->used_by_bfd == (PTR)NULL) { section->used_by_bfd = (PTR)bfd_alloc (abfd, section->size); pass_over(abfd, fillup, section); } (void) memcpy(location, (bfd_byte *)(section->used_by_bfd) + offset, count); return true; } boolean srec_set_arch_mach (abfd, arch, machine) bfd *abfd; enum bfd_architecture arch; unsigned long machine; { abfd->obj_arch = arch; abfd->obj_machine = machine; return true; } boolean srec_set_section_contents (abfd, section, location, offset, bytes_to_do) bfd *abfd; sec_ptr section; unsigned char *location; file_ptr offset; int bytes_to_do; { bfd_vma address; int bytes_written; int type; unsigned int i; srec_type buffer; bytes_written = 0; if (section->vma <= 0xffff) type = 1; else if (section->vma <= 0xffffff) type = 2; else type = 3; buffer.S = 'S'; buffer.type = '0' + type; while (bytes_written < bytes_to_do) { unsigned int size; unsigned int check_sum; byte_as_two_char_type *data; unsigned int bytes_this_chunk = bytes_to_do - bytes_written; if (bytes_this_chunk > CHUNK) { bytes_this_chunk = CHUNK; } address = section->vma + offset + bytes_written; switch (type) { case 3: check_sum = TOHEX(buffer.u.type_3.address, address >> 24); check_sum += TOHEX(buffer.u.type_3.address+1, address >> 16); check_sum += TOHEX(buffer.u.type_3.address+2, address >> 8); check_sum += TOHEX(buffer.u.type_3.address+3, address >> 0); size = bytes_this_chunk + 5; data = buffer.u.type_3.data; break; case 2: check_sum = TOHEX(buffer.u.type_3.address, address >> 16); check_sum += TOHEX(buffer.u.type_3.address+1, address >> 8); check_sum += TOHEX(buffer.u.type_3.address+2, address >> 0); size = bytes_this_chunk + 4; data = buffer.u.type_2.data; break; case 1: check_sum = TOHEX(buffer.u.type_3.address+0, address >> 8); check_sum += TOHEX(buffer.u.type_3.address+1, address >> 0); size = bytes_this_chunk + 3; data = buffer.u.type_1.data; break; } for (i = 0; i < bytes_this_chunk; i++) { check_sum += TOHEX(data, (location[i])); data++; } check_sum += TOHEX(&(buffer.size), size ); (void) TOHEX(data, ~check_sum); data++; * ( (char *)(data)) = '\n'; bfd_write((PTR)&buffer, 1, (char *)data - (char *)&buffer + 1 , abfd); bytes_written += bytes_this_chunk; location += bytes_this_chunk; } return true; } boolean srec_write_object_contents (abfd) bfd *abfd; { bfd_write("S9030000FC\n", 1,11,abfd); return true; } static int DEFUN(srec_sizeof_headers,(abfd, exec), bfd *abfd AND boolean exec) { return 0; } static asymbol * DEFUN(srec_make_empty_symbol, (abfd), bfd*abfd) { asymbol *new= (asymbol *)bfd_zalloc (abfd, sizeof (asymbol)); new->the_bfd = abfd; return new; } #define FOO PROTO #define srec_new_section_hook (FOO(boolean, (*), (bfd *, asection *)))bfd_true #define srec_get_symtab_upper_bound bfd_false #define srec_get_symtab (FOO(unsigned int, (*), (bfd *, asymbol **)))bfd_0 #define srec_get_reloc_upper_bound (FOO(unsigned int, (*),(bfd*, asection *)))bfd_false #define srec_canonicalize_reloc (FOO(unsigned int, (*),(bfd*,asection *, arelent **, asymbol **))) bfd_0 #define srec_print_symbol (FOO(void,(*),(bfd *, PTR, asymbol *, bfd_print_symbol_enum_type))) bfd_void #define srec_openr_next_archived_file (FOO(bfd *, (*), (bfd*,bfd*))) bfd_nullvoidptr #define srec_find_nearest_line (FOO(boolean, (*),(bfd*,asection*,asymbol**,bfd_vma, CONST char**, CONST char**, unsigned int *))) bfd_false #define srec_generic_stat_arch_elt (FOO(int, (*), (bfd *,struct stat *))) bfd_0 #define srec_core_file_failing_command (char *(*)())(bfd_nullvoidptr) #define srec_core_file_failing_signal (int (*)())bfd_0 #define srec_core_file_matches_executable_p (FOO(boolean, (*),(bfd*, bfd*)))bfd_false #define srec_slurp_armap bfd_true #define srec_slurp_extended_name_table bfd_true #define srec_truncate_arname (void (*)())bfd_nullvoidptr #define srec_write_armap (FOO( boolean, (*),(bfd *, unsigned int, struct orl *, int, int))) bfd_nullvoidptr #define srec_get_lineno (struct lineno_cache_entry *(*)())bfd_nullvoidptr #define srec_close_and_cleanup bfd_generic_close_and_cleanup #define srec_bfd_debug_info_start bfd_void #define srec_bfd_debug_info_end bfd_void #define srec_bfd_debug_info_accumulate (FOO(void, (*), (bfd *, asection *))) bfd_void bfd_target srec_vec = { "srec", /* name */ bfd_target_srec_flavour_enum, true, /* target byte order */ true, /* target headers byte order */ (HAS_RELOC | EXEC_P | /* object flags */ HAS_LINENO | HAS_DEBUG | HAS_SYMS | HAS_LOCALS | DYNAMIC | WP_TEXT | D_PAGED), (SEC_CODE|SEC_DATA|SEC_ROM|SEC_HAS_CONTENTS |SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */ ' ', /* ar_pad_char */ 16, /* ar_max_namelen */ 1, /* minimum alignment */ _do_getb64, _do_putb64, _do_getb32, _do_putb32, _do_getb16, _do_putb16, /* data */ _do_getb64, _do_putb64, _do_getb32, _do_putb32, _do_getb16, _do_putb16, /* hdrs */ {_bfd_dummy_target, srec_object_p, /* bfd_check_format */ (struct bfd_target *(*)()) bfd_nullvoidptr, (struct bfd_target *(*)()) bfd_nullvoidptr, }, { bfd_false, bfd_true, /* mkobject */ _bfd_generic_mkarchive, bfd_false, }, { /* bfd_write_contents */ bfd_false, srec_write_object_contents, _bfd_write_archive_contents, bfd_false, }, JUMP_TABLE(srec) };