164 lines
3.4 KiB
C
164 lines
3.4 KiB
C
/*
|
|
* Convert Intel microcode.dat into individual ucode files
|
|
* named: intel-ucode/$family-$model-$stepping
|
|
*
|
|
* The subdir intel-ucode/ is created in the current working
|
|
* directory. We get multiple ucodes in the same file, so they
|
|
* are appended to an existing file. Make sure the directory
|
|
* is empty before every run of the converter.
|
|
*
|
|
* Kay Sievers <kay.sievers@vrfy.org>
|
|
*/
|
|
|
|
|
|
#ifndef _GNU_SOURCE
|
|
# define _GNU_SOURCE 1
|
|
#endif
|
|
|
|
#include <stdio.h>
|
|
#include <unistd.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <time.h>
|
|
#include <limits.h>
|
|
#include <stdbool.h>
|
|
#include <inttypes.h>
|
|
#include <fcntl.h>
|
|
#include <errno.h>
|
|
#include <sys/stat.h>
|
|
|
|
struct microcode_header_intel {
|
|
unsigned int hdrver;
|
|
unsigned int rev;
|
|
unsigned int date;
|
|
unsigned int sig;
|
|
unsigned int cksum;
|
|
unsigned int ldrver;
|
|
unsigned int pf;
|
|
unsigned int datasize;
|
|
unsigned int totalsize;
|
|
unsigned int reserved[3];
|
|
};
|
|
|
|
union mcbuf {
|
|
struct microcode_header_intel hdr;
|
|
unsigned int i[0];
|
|
char c[0];
|
|
};
|
|
|
|
int main(int argc, char *argv[])
|
|
{
|
|
char *filename = "/lib/firmware/microcode.dat";
|
|
FILE *f;
|
|
char line[LINE_MAX];
|
|
char buf[4000000];
|
|
union mcbuf *mc;
|
|
size_t bufsize, count, start;
|
|
int rc = EXIT_SUCCESS;
|
|
|
|
if (argv[1] != NULL)
|
|
filename = argv[1];
|
|
|
|
count = 0;
|
|
mc = (union mcbuf *) buf;
|
|
f = fopen(filename, "re");
|
|
if (f == NULL) {
|
|
printf("open %s: %m\n", filename);
|
|
rc = EXIT_FAILURE;
|
|
goto out;
|
|
}
|
|
|
|
while (fgets(line, sizeof(line), f) != NULL) {
|
|
if (sscanf(line, "%x, %x, %x, %x",
|
|
&mc->i[count],
|
|
&mc->i[count + 1],
|
|
&mc->i[count + 2],
|
|
&mc->i[count + 3]) != 4)
|
|
continue;
|
|
count += 4;
|
|
}
|
|
fclose(f);
|
|
|
|
bufsize = count * sizeof(int);
|
|
printf("%s: %lu(%luk) bytes, %zu integers\n",
|
|
filename,
|
|
bufsize,
|
|
bufsize / 1024,
|
|
count);
|
|
|
|
if (bufsize < sizeof(struct microcode_header_intel))
|
|
goto out;
|
|
|
|
mkdir("intel-ucode", 0750);
|
|
|
|
start = 0;
|
|
for (;;) {
|
|
size_t size;
|
|
unsigned int family, model, stepping;
|
|
unsigned int year, month, day;
|
|
|
|
mc = (union mcbuf *) &buf[start];
|
|
|
|
if (mc->hdr.totalsize)
|
|
size = mc->hdr.totalsize;
|
|
else
|
|
size = 2000 + sizeof(struct microcode_header_intel);
|
|
|
|
if (mc->hdr.ldrver != 1 || mc->hdr.hdrver != 1) {
|
|
printf("unknown version/format:\n");
|
|
rc = EXIT_FAILURE;
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* 0- 3 stepping
|
|
* 4- 7 model
|
|
* 8-11 family
|
|
* 12-13 type
|
|
* 16-19 extended model
|
|
* 20-27 extended family
|
|
*/
|
|
family = (mc->hdr.sig >> 8) & 0xf;
|
|
if (family == 0xf)
|
|
family += (mc->hdr.sig >> 20) & 0xff;
|
|
model = (mc->hdr.sig >> 4) & 0x0f;
|
|
if (family == 0x06)
|
|
model += ((mc->hdr.sig >> 16) & 0x0f) << 4;
|
|
stepping = mc->hdr.sig & 0x0f;
|
|
|
|
year = mc->hdr.date & 0xffff;
|
|
month = mc->hdr.date >> 24;
|
|
day = (mc->hdr.date >> 16) & 0xff;
|
|
|
|
asprintf(&filename, "intel-ucode/%02x-%02x-%02x", family, model, stepping);
|
|
printf("\n");
|
|
printf("%s\n", filename);
|
|
printf("signature: 0x%02x\n", mc->hdr.sig);
|
|
printf("flags: 0x%02x\n", mc->hdr.pf);
|
|
printf("revision: 0x%02x\n", mc->hdr.rev);
|
|
printf("date: %04x-%02x-%02x\n", year, month, day);
|
|
printf("size: %zu\n", size);
|
|
|
|
f = fopen(filename, "ae");
|
|
if (f == NULL) {
|
|
printf("open %s: %m\n", filename);
|
|
rc = EXIT_FAILURE;
|
|
goto out;
|
|
}
|
|
if (fwrite(mc, size, 1, f) != 1) {
|
|
printf("write %s: %m\n", filename);
|
|
rc = EXIT_FAILURE;
|
|
goto out;
|
|
}
|
|
fclose(f);
|
|
free(filename);
|
|
|
|
start += size;
|
|
if (start >= bufsize)
|
|
break;
|
|
}
|
|
printf("\n");
|
|
out:
|
|
return rc;
|
|
}
|