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bios_extract: Add support for BCPCMP-less Phoenix 4.0x

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This commit is contained in:
RichardG867
2023-11-30 11:08:56 -03:00
parent 71ebe01a55
commit d3a9f7fda6
1 changed files with 16 additions and 13 deletions
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29
bios_extract/src/phoenix.c
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@@ -986,20 +986,21 @@ PhoenixExtract(unsigned char *BIOSImage, int BIOSLength, int BIOSOffset,
/* BCPCMP parsing */
unsigned char *bcpcmp = memmem(BIOSImage, BIOSLength - 6, "BCPCMP", 6);
if (!bcpcmp) {
fprintf(stderr, "Error: Failed to locate BCPCMP offset.\n");
return FALSE;
struct bcpCompress *bcpComp = NULL;
if (bcpcmp) {
uint32_t bcpoff = bcpcmp - BIOSImage;
bcpComp = (struct bcpCompress *)(BIOSImage + bcpoff);
phx.compression = bcpComp->alg;
if ((bcpComp->head.major_revision == 0) && (bcpComp->head.minor_revision == 0))
phx.commonCharacterLZSS = bcpComp->alt.commonCharacterLZSS;
else
phx.commonCharacterLZSS = bcpComp->main.commonCharacterLZSS;
} else {
/* BCPCMP can be missing (Hitachi Flora 3100 - 4.04 for Corollary C-bus) */
phx.compression = 0;
phx.commonCharacterLZSS = ' ';
}
uint32_t bcpoff = bcpcmp - BIOSImage;
struct bcpCompress *bcpComp =
(struct bcpCompress *)(BIOSImage + bcpoff);
phx.compression = bcpComp->alg;
if ((bcpComp->head.major_revision == 0) && (bcpComp->head.minor_revision == 0))
phx.commonCharacterLZSS = bcpComp->alt.commonCharacterLZSS;
else
phx.commonCharacterLZSS = bcpComp->main.commonCharacterLZSS;
Offset = le32toh(*((uint32_t *) (((char *)SYS) + 0x77)));
Offset &= (BIOSLength - 1);
if (!Offset) {
@@ -1197,7 +1198,9 @@ PhoenixExtract(unsigned char *BIOSImage, int BIOSLength, int BIOSOffset,
Offset = 0;
Length = BIOSLength;
}
if ((bcpComp->head.major_revision == 0) && (bcpComp->head.minor_revision == 0)) {
if (!bcpComp) {
/* ignore */
} else if ((bcpComp->head.major_revision == 0) && (bcpComp->head.minor_revision == 0)) {
Offset += le16toh(bcpComp->alt.unc_start_offset);
Length -= le16toh(bcpComp->alt.unc_start_offset);
} else {