diff options
Diffstat (limited to 'bfd/srec.c')
| -rw-r--r-- | bfd/srec.c | 129 |
1 files changed, 59 insertions, 70 deletions
@@ -1,45 +1,36 @@ -/* Copyright (C) 1990, 1991 Free Software Foundation, Inc. +/* BFD backend for s-record objects. + Copyright (C) 1990-1991 Free Software Foundation, Inc. + Written by Steve Chamberlain of Cygnus Support <steve@cygnus.com>. -This file is part of BFD, the Binary File Diddler. +This file is part of BFD, the Binary File Descriptor library. -BFD is free software; you can redistribute it and/or modify +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 1, or (at your option) -any later version. +the Free Software Foundation; either version 2 of the License, or +(at your option) any later version. -BFD is distributed in the hope that it will be useful, +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 BFD; see the file COPYING. If not, write to -the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ +along with this program; if not, write to the Free Software +Foundation, Inc., 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 - - */ +/* S-records cannot hold anything but addresses and data, so that's all + that we implement. + + The only interesting thing is that s-records 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 arbitrarily 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. */ #include <sysdep.h> #include "bfd.h" @@ -50,10 +41,11 @@ static char digs[] = "0123456789ABCDEF"; /* Macros for converting between hex and binary */ -#define NIBBLE(x) ((x >= '0' && x <= '9') ? (x - '0') : (x - 'A' + 10)) +#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) + ((d)->low = digs[(x) & 0xf], (d)->high = digs[((x)>>4)&0xf], (x)) +#define ISHEX(x) (((x) >= '0' && (x) <= '9') || ((x) >= 'A' && (x) <= 'F')) typedef struct { char high; @@ -65,7 +57,7 @@ typedef struct { /* The number of bytes we fit onto a line on output */ #define CHUNK 16 -/* The shape of an srecord .. */ +/* The shape of an s-record .. */ typedef struct { char S; @@ -106,7 +98,7 @@ typedef struct #define enda(x) (x->vma + x->size) /* - called once per input srecord, used to work out vma and size of data. + called once per input s-record, used to work out vma and size of data. */ static bfd_vma low,high; @@ -126,7 +118,7 @@ unsigned int length; /* - called once per input srecord, copies data from input into bfd_alloc'd area + called once per input s-record, copies data from input into bfd_alloc'd area */ static void @@ -146,15 +138,14 @@ unsigned int length; } } -/* - pass over an srecord file calling one of the above functions on each - record - */ +/* Pass over an s-record file, calling one of the above functions on each + record. */ + static void pass_over(abfd, func, section) -bfd *abfd; -void (*func)(); -asection *section; + bfd *abfd; + void (*func)(); + asection *section; { unsigned int bytes_on_line; boolean eof = false; @@ -174,7 +165,11 @@ asection *section; bfd_read(&buffer.type, 1, 3, abfd); + if (!ISHEX (buffer.size.high) || !ISHEX (buffer.size.low)) + break; bytes_on_line = HEX(&buffer.size); + if (bytes_on_line > MAXCHUNK/2) + break; bfd_read((PTR)buffer.u.data, 1 , bytes_on_line * 2, abfd); @@ -182,31 +177,33 @@ asection *section; 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)); + + (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)); + 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)); + 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; + default: + goto end_of_file; } } + end_of_file: ; } @@ -214,17 +211,15 @@ bfd_target * srec_object_p (abfd) bfd *abfd; { - char b; + char b[4]; 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 - */ - + bfd_read(b, 1, 4, abfd); + if (b[0] != 'S' || !ISHEX(b[1]) || !ISHEX(b[2]) || !ISHEX(b[3])) + return (bfd_target*) NULL; + + /* We create one section called .text for all the contents, + and allocate enough room for the entire file. */ section = bfd_make_section(abfd, ".text"); section->size = 0; @@ -238,12 +233,6 @@ bfd *abfd; } - - - - - - static boolean srec_get_section_contents (abfd, section, location, offset, count) bfd *abfd; @@ -256,7 +245,7 @@ unsigned int count; 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); + (void) memcpy((PTR)location, (PTR)((char *)(section->used_by_bfd) + offset), count); return true; } @@ -383,7 +372,7 @@ DEFUN(srec_make_empty_symbol, (abfd), } #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_upper_bound (PROTO(unsigned int, (*),(bfd *)))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 |