From c44ef19d49c16064bed8964557f102fb58a336e7 Mon Sep 17 00:00:00 2001
From: Francis Rowe <info@gluglug.org.uk>
Date: Sun, 11 Jan 2015 00:08:24 -0500
Subject: ich9deblob/ich9gen: replace endianness checking function

---
(limited to 'resources')

diff --git a/resources/utilities/ich9deblob/src/common/x86compatibility.c b/resources/utilities/ich9deblob/src/common/x86compatibility.c
index aaf3173..f172d9a 100644
--- a/resources/utilities/ich9deblob/src/common/x86compatibility.c
+++ b/resources/utilities/ich9deblob/src/common/x86compatibility.c
@@ -48,19 +48,6 @@ int structSizesIncorrect(struct DESCRIPTORREGIONRECORD descriptorDummy, struct G
 	return 0;
 }
 
-/* endianness check. big endian forced to fail */
-int systemIsBigEndian() 
-{
-	uint16_t steak = 0xBEEF;
-	uint8_t *grill = (uint8_t*)&steak;
-	
-	if (*grill!=0xEF) {
-		printf("\nunsigned short 0xBEEF: first byte should be EF, but it's BE. Your system is big endian, and unsupported (only little endian is tested)\n");
-		return 1;
-	}
-	return 0; /* you got the good half of the steak */
-}
-
 /* fail if members are presented in the wrong order */
 int structMembersWrongOrder()
 {
@@ -164,7 +151,10 @@ int structBitfieldWrongOrder()
 int systemOrCompilerIncompatible(struct DESCRIPTORREGIONRECORD descriptorStruct, struct GBEREGIONRECORD_8K gbeStruct8k) 
 {
 	if (structSizesIncorrect(descriptorStruct, gbeStruct8k)) return 1;
-	if (systemIsBigEndian()) return 1;
+	if (IS_BIG_ENDIAN) {
+		printf("big endian not supported\n");
+		return 1;
+	}
 	if (structBitfieldWrongOrder()) return 1;
 	if (structMembersWrongOrder()) return 1; 
 	return 0;
diff --git a/resources/utilities/ich9deblob/src/common/x86compatibility.h b/resources/utilities/ich9deblob/src/common/x86compatibility.h
index e5f02be..9460b28 100644
--- a/resources/utilities/ich9deblob/src/common/x86compatibility.h
+++ b/resources/utilities/ich9deblob/src/common/x86compatibility.h
@@ -28,11 +28,13 @@
 #include <string.h>
 #include <stdint.h>
 
+/* http://esr.ibiblio.org/?p=5095 */
+#define IS_BIG_ENDIAN (*(uint16_t *)"\0\xff" < 0x100)
+
 #include "../descriptor/descriptor.h" /* structs describing what's in the descriptor region */
 #include "../gbe/gbe.h"               /* structs describing what's in the gbe region */
 
 int structSizesIncorrect(struct DESCRIPTORREGIONRECORD descriptorDummy, struct GBEREGIONRECORD_8K gbe8kDummy);
-int systemIsBigEndian();
 int structMembersWrongOrder();
 int structBitfieldWrongOrder();
 int systemOrCompilerIncompatible(struct DESCRIPTORREGIONRECORD descriptorStruct, struct GBEREGIONRECORD_8K gbeStruct8k);
--
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