diff options
Diffstat (limited to '')
| -rw-r--r-- | tools/build/binpatch.c | 168 |
1 files changed, 168 insertions, 0 deletions
diff --git a/tools/build/binpatch.c b/tools/build/binpatch.c new file mode 100644 index 0000000000..ab0900702a --- /dev/null +++ b/tools/build/binpatch.c @@ -0,0 +1,168 @@ +/* + * $Id$ + */ + + +#include <stdio.h> +#include <stdlib.h> + +/* + * This function will patch binary file + */ + + +static char buf[512]; + +static void +usage(void) +{ + printf("usage: binpatch [-h] <ofile> <ifile> <reloc> <off> <byte0> " + "[<byte1> [<byte2> [<byte3>]]]\n"); + printf("this function patches binary file at specified offset with\n"); + printf("up to 4 bytes provided on command line \n"); + printf("-h - prints this message\n\n"); + printf("<ofile> - output file\n"); + printf("<ifile> - input ifile\n"); + printf("<reloc> - relocation address of image\n"); + printf("<off> - offset of patch, offset in file is at off - reloc\n"); + printf("<byte0> - byte 0 of patch\n"); + printf("<byte1> - byte 1 of patch\n"); + printf("<byte2> - byte 1 of patch\n"); + printf("<byte3> - byte 1 of patch\n"); + + return; +} + +int +main(int argc, char **argv) +{ + int c; + FILE *ofp, *ifp; + char patch[4], *end; + int patchLen, tmp, i, off, cnt, patched, len, reloc; + + + /* parse command line options */ + while ((c = getopt(argc, argv, "h")) >= 0) + { + switch (c) + { + case 'h': + usage(); + return 0; + default: + usage(); + return 1; + } + } + + if(argc < 6) + { + usage(); + return 1; + } + + /* Let us get offset in file */ + reloc = strtol(argv[3], &end, 0); + if(end == argv[3] || off < 0) + { + fprintf(stderr, "bad reloc value %s\n", argv[3]); + return 1; + } + + off = strtol(argv[4], &end, 0); + if(end == argv[4] || off < 0 || off < reloc) + { + fprintf(stderr, "bad offset value %s\n", argv[4]); + return 1; + } + + off -= reloc; + + /* Let us get patch */ + patchLen = argc - 5; + + for(i=0; i<patchLen; i++) + { + tmp = strtol(argv[5+i], &end, 0); + + if(end == argv[4+i] || tmp < 0 || tmp > 0xff) + { + fprintf(stderr, "bad byte value %s\n", argv[5+i]); + return 1; + } + patch[i] = tmp; + } + + ifp = fopen(argv[2], "r"); + if(ifp == NULL) + { + fprintf(stderr, "unable to open file %s\n", argv[2]); + return 1; + } + + ofp = fopen(argv[1], "w"); + if(ofp == NULL) + { + fprintf(stderr, "unable to open file %s\n", argv[1]); + return 1; + } + + cnt = 0; + patched = 0; + for(;;) + { + len = fread(buf, 1, sizeof(buf), ifp); + + if(len == 0) + { + break; + } + + if(cnt <= off && (cnt + len) > off) + { + /* Perform patch */ + for(i=0; i<patchLen && (off+i)<(cnt+len); i++) + { + buf[off-cnt+i] = patch[i]; + } + patched = 1; + } + else if(cnt > off && cnt < (off + patchLen)) + { + /* Perform patch */ + for(i=cnt-off; i<patchLen; i++) + { + buf[off-cnt+i] = patch[i]; + } + patched = 1; + } + + fwrite(buf, 1, len, ofp); + + cnt += len; + } + + fclose(ifp); + fclose(ofp); + + if(!patched) + { + fprintf(stderr, "warning: offset is beyond input file length\n"); + fprintf(stderr, " no patch is performed\n"); + } + + return 0; +} + + + + + + + + + + + + |