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@ -5,6 +5,17 @@
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#include <string.h>
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#include <errno.h>
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#include <unistd.h>
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#if __BYTE_ORDER == __BIG_ENDIAN
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#define STORE32_LE(X) bswap_32(X)
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#define LOAD32_LE(X) bswap_32(X)
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#elif __BYTE_ORDER == __LITTLE_ENDIAN
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#define STORE32_LE(X) (X)
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#define LOAD32_LE(X) (X)
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#else
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#error unkown endianness!
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#endif
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/**********************************************************************/
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/* from trxhdr.h */
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@ -22,6 +33,12 @@ struct trx_header {
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};
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struct edimax_header {
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uint32_t sign; /* signature for header */
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uint32_t length; /* start address but doesn't seems to be used... */
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uint32_t start_addr; /* length of data, not used too ...*/
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};
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#define EDIMAX_PS16 0x36315350 /* "PS16" */
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#define EDIMAX_HDR_LEN 0xc
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@ -93,16 +110,13 @@ int main(int argc, char *argv[])
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{
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FILE *fpIn = NULL;
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FILE *fpOut = NULL;
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long nImgSize;
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uint32_t sign = EDIMAX_PS16; /* signature for header */
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uint32_t start_addr = 0x80500000; /* start address but doesn't seems to be used... */
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uint32_t length; /* length of data, not used too ...*/
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struct edimax_header eh;
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size_t res;
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int length;
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char *buf;
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struct trx_header *p;
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if (argc != 3) {
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printf("Usage: %s <input file> <output file>\n", argv[0]);
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return -1;
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@ -128,8 +142,8 @@ int main(int argc, char *argv[])
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res = fread(buf, 1, length, fpIn);
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p = (struct trx_header *)buf;
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if (p->magic != TRX_MAGIC) {
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fprintf(stderr, "Not a trx file...%x\n", p->magic);
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if (LOAD32_LE(p->magic) != TRX_MAGIC) {
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fprintf(stderr, "Not a trx file...%x\n", LOAD32_LE(p->magic));
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return EXIT_FAILURE;
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}
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@ -141,13 +155,16 @@ int main(int argc, char *argv[])
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return EXIT_FAILURE;
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}
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/* make the 3 partition beeing 12 bytes closer from the header */
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memcpy(buf + p->offsets[2] - EDIMAX_HDR_LEN, buf + p->offsets[2], length - p->offsets[2]);
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memcpy(buf + LOAD32_LE(p->offsets[2]) - EDIMAX_HDR_LEN, buf + LOAD32_LE(p->offsets[2]), length - LOAD32_LE(p->offsets[2]));
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/* recompute the crc32 check */
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p->crc32 = crc32buf((char *) &p->flag_version, length - offsetof(struct trx_header, flag_version));
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p->crc32 = STORE32_LE(crc32buf((char *) &(LOAD32_LE(p->flag_version)), length - offsetof(struct trx_header, flag_version)));
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eh.sign = STORE32_LE(EDIMAX_PS16);
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eh.length = STORE32_LE(length);
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eh.start_addr = STORE32_LE(0x80500000);
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/* write the modified file */
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fwrite(&sign, sizeof(uint32_t), 1, fpOut);
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fwrite(&length, sizeof(uint32_t), 1, fpOut);
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fwrite(&start_addr, sizeof(uint32_t), 1, fpOut);
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fwrite(&eh, sizeof(struct edimax_header), 1, fpOut);
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fwrite(buf, sizeof(char), length, fpOut);
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fclose(fpOut);
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}
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