ich9deblob: fail if struct members are in wrong order in memory

1 files changed, 59 insertions, 2 deletions

diff --git a/resources/utilities/ich9deblob/ich9deblob.c b/resources/utilities/ich9deblob/ich9deblob.c
index 22c5787..216c8d0 100644
--- a/resources/utilities/ich9deblob/ich9deblob.c
+++ b/resources/utilities/ich9deblob/ich9deblob.c
@@ -63,6 +63,7 @@ struct DESCRIPTORREGIONRECORD deblobbedFromFactory(struct DESCRIPTORREGIONRECORD
 int structSizesIncorrect(struct DESCRIPTORREGIONRECORD descriptorDummy, struct GBEREGIONRECORD_8K gbe8kDummy);
 int systemIsBigEndian();
 int structBitfieldWrongOrder();
+int structMembersWrongOrder();
 
 int main(int argc, char *argv[])
 {
@@ -79,6 +80,7 @@ int main(int argc, char *argv[])
 	if (structSizesIncorrect(factoryDescriptorStruct, factoryGbeStruct8k)) return 1;
 	if (systemIsBigEndian()) return 1;
 	if (structBitfieldWrongOrder()) return 1;
+	if (structMembersWrongOrder()) return 1; 
 	
 	// -----------------------------------------------------------------------------------------------
 	
@@ -295,6 +297,61 @@ int systemIsBigEndian() {
 	return 0;
 }
 
+// fail if members are presented in the wrong order
+int structMembersWrongOrder() {
+	struct DESCRIPTORREGIONRECORD descriptorDummy;
+	
+	// These do not use bitfields. 
+	descriptorDummy.meVsccTable.jid0 = 0x01020304;  // unsigned int 32-bit
+	descriptorDummy.meVsccTable.vscc0 = 0x10203040; // unsigned int 32-bit
+	descriptorDummy.meVsccTable.jid1 = 0x11223344;  // unsigned int 32-bit
+	descriptorDummy.meVsccTable.vscc1 = 0x05060708; // unsigned int 32-bit
+	descriptorDummy.meVsccTable.jid2 = 0x50607080;  // unsigned int 32-bit
+	descriptorDummy.meVsccTable.vscc2 = 0x55667788; // unsigned int 32-bit
+	descriptorDummy.meVsccTable.padding[0] = 0xAA;  // unsigned char 8-bit
+	descriptorDummy.meVsccTable.padding[1] = 0xBB;  // unsigned char 8-bit
+	descriptorDummy.meVsccTable.padding[2] = 0xCC;  // unsigned char 8-bit
+	descriptorDummy.meVsccTable.padding[3] = 0xDD;  // unsigned char 8-bit
+	
+	// Look from the top down, and concatenate the unsigned ints but
+	// with each unsigned in little endian order. 
+	// Then, concatenate the unsigned chars in big endian order. (in the padding array)
+	
+	// combined, these should become:
+	// 01020304 10203040 11223344 05060708 50607080 55667788 AA BB CC DD (ignore this. big endian. just working it out manually:)
+	// 04030201 40302010 44332211 08070605 80706050 88776655 AA BB CC DD (ignore this. not byte-separated, just working it out:)
+	// 04 03 02 01 40 30 20 10 44 33 22 11 08 07 06 05 80 70 60 50 88 77 66 55 AA BB CC DD <-- it should match this
+	
+	unsigned char *meVsccTablePtr = (unsigned char*)&descriptorDummy.meVsccTable;
+	
+	printf("\nStruct member order check (descriptorDummy.meVsccTable) with junk/dummy data:");
+	printf("\nShould be: 04 03 02 01 40 30 20 10 44 33 22 11 08 07 06 05 80 70 60 50 88 77 66 55 aa bb cc dd ");
+	printf("\nAnd it is: ");
+	int i;
+	for (i = 0; i < 28; i++) {
+		printf("%02x ", *(meVsccTablePtr + i));	
+	}
+	printf("\n");
+	
+	if (
+			!
+			(
+				*meVsccTablePtr      == 0x04 && *(meVsccTablePtr+1)  == 0x03 && *(meVsccTablePtr+2)  == 0x02 && *(meVsccTablePtr+3)  == 0x01
+			&& *(meVsccTablePtr+4)  == 0x40 && *(meVsccTablePtr+5)  == 0x30 && *(meVsccTablePtr+6)  == 0x20 && *(meVsccTablePtr+7)  == 0x10
+			&& *(meVsccTablePtr+8)  == 0x44 && *(meVsccTablePtr+9)  == 0x33 && *(meVsccTablePtr+10) == 0x22 && *(meVsccTablePtr+11) == 0x11
+			&& *(meVsccTablePtr+12) == 0x08 && *(meVsccTablePtr+13) == 0x07 && *(meVsccTablePtr+14) == 0x06 && *(meVsccTablePtr+15) == 0x05
+			&& *(meVsccTablePtr+16) == 0x80 && *(meVsccTablePtr+17) == 0x70 && *(meVsccTablePtr+18) == 0x60 && *(meVsccTablePtr+19) == 0x50
+			&& *(meVsccTablePtr+20) == 0x88 && *(meVsccTablePtr+21) == 0x77 && *(meVsccTablePtr+22) == 0x66 && *(meVsccTablePtr+23) == 0x55
+			&& *(meVsccTablePtr+24) == 0xAA && *(meVsccTablePtr+25) == 0xBB && *(meVsccTablePtr+26) == 0xCC && *(meVsccTablePtr+27) == 0xDD
+	      )
+	   ) {
+		printf("Incorrect order.\n");
+		return 1;
+	}
+	printf("Correct order.\n");
+	return 0;
+}
+
 // fail if bit fields are presented in the wrong order
 int structBitfieldWrongOrder() {
 	struct DESCRIPTORREGIONRECORD descriptorDummy;
@@ -316,12 +373,12 @@ int structBitfieldWrongOrder() {
 	
 	unsigned char *flMap0Ptr = (unsigned char*)&descriptorDummy.flMaps.flMap0;
 	
-	printf("Bitfield order check (descriptorDummy.flMaps.flMaps0):");
+	printf("\nBitfield order check (descriptorDummy.flMaps.flMaps0) with junk/dummy data:");
 	printf("\nShould be: a2 e2 d2 e5 ");
 	printf("\nAnd it is: ");
 	int i;
 	for (i = 0; i < 4; i++) {
-		printf("%x ", *(flMap0Ptr + i));	
+		printf("%02x ", *(flMap0Ptr + i));	
 	}
 	printf("\n");