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Decrease Intel bruteforce interval from 16 KB (previous commit message was wrong) to 4 KB, fixes AP450GX

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RichardG867
2022-04-18 19:00:42 -03:00
parent 461ac762bf
commit 736c8f968d
1 changed files with 9 additions and 5 deletions
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14
bios_extract/src/bios_extract.c
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@@ -284,9 +284,9 @@ int main(int argc, char *argv[])
/* Bruteforce Intel AMI Color fork LH5. */
Offset2 = 1;
for (Offset1 = 0; Offset1 < (FileLength - 10); Offset1 += 0x4000) {
for (Offset1 = 0; Offset1 < (FileLength - 10); Offset1 += 0x1000) {
BIOSOffset = Offset1;
CopyrightOffset:if ((LH5Decode(BIOSImage + BIOSOffset, FileLength - BIOSOffset, IntelAMI, 13) > -1) &&
retry: if (((fd = LH5Decode(BIOSImage + BIOSOffset, FileLength - BIOSOffset, IntelAMI, 13)) > -1) &&
(!memcmp(IntelAMI, "AMIBIOS(C)AMI", 13) || ((IntelAMI[0] == 0x55) && (IntelAMI[1] == 0xaa)))) {
if (Offset2 == 1) {
printf("Found potential Intel AMIBIOS.\n");
@@ -303,7 +303,7 @@ CopyrightOffset:if ((LH5Decode(BIOSImage + BIOSOffset, FileLength - BIOSOffset,
Offset2 = 0; /* main body found, all good */
}
Buffer = MMapOutputFile((char *) IntelAMI, len);
save: Buffer = MMapOutputFile((char *) IntelAMI, len);
if (!Buffer)
return 1;
@@ -319,8 +319,12 @@ CopyrightOffset:if ((LH5Decode(BIOSImage + BIOSOffset, FileLength - BIOSOffset,
munmap(Buffer, len);
} else if (!(BIOSOffset & 0xff)) {
BIOSOffset += 0x44;
goto CopyrightOffset;
BIOSOffset += 0x44; /* skip "Copyright Notice: Copyright Intel..." */
goto retry;
} else if ((fd > -1) && !memcmp(BIOSImage + Offset1, "Copyright Notice: Copyright Intel", 33)) {
len = 65536;
sprintf((char *) IntelAMI, "intelunk_%05X.rom", BIOSOffset);
goto save;
}
}