rdramPatch.c
1.57 KB
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#include <stdio.h>
#include <stdlib.h>
#include <verify.h>
#define LIST_ADDR (VERIFY_INFO_PHYSADDR + RDPLIST_ADDR_OFFSET)
#define COUNT_ADDR (VERIFY_INFO_PHYSADDR + RDPLISTSIZE_OFFSET)
main (int argc, char *argv[])
{
FILE *fp;
unsigned int newCount[2], temp;
int count;
unsigned long long int lcount;
int startaddr;
if (argc != 2) {
fprintf(stderr, "Usage: %s memory_file\n", argv[0]);
exit(1);
}
if ( (fp = fopen(argv[1], "r+")) == NULL) {
fprintf(stderr, "Could not open %s\n", argv[1]);
exit(1);
}
fseek(fp, LIST_ADDR, SEEK_SET);
fread(&startaddr, sizeof (startaddr), 1, fp);
fseek(fp, COUNT_ADDR, SEEK_SET);
fread(&lcount, sizeof (lcount), 1, fp);
count = (int) lcount;
fprintf(stderr, "start 0x%x, original count 0x%x\n", startaddr, count);
fseek(fp, COUNT_ADDR, SEEK_SET);
fread(&newCount, sizeof (unsigned int), 2, fp);
fprintf(stderr, "\tnewCount[0] = 0x%x, newCount[1] = 0x%x\n",
newCount[0], newCount[1]);
/*
* Swap 'em.
*/
temp = newCount[0];
newCount[0] = newCount[1];
newCount[1] = temp;
fprintf(stderr, "\tnewCount[0] now = 0x%x, newCount[1] now = 0x%x\n",
newCount[0], newCount[1]);
fseek(fp, COUNT_ADDR, SEEK_SET);
fwrite(&newCount, sizeof (unsigned int), 2, fp);
fseek(fp, LIST_ADDR, SEEK_SET);
fread(&startaddr, sizeof (startaddr), 1, fp);
fseek(fp, COUNT_ADDR, SEEK_SET);
fread(&lcount, sizeof (lcount), 1, fp);
count = (int) lcount;
fprintf(stderr, "start 0x%x, patched count 0x%x\n\n", startaddr, count);
}