OcGuardLib: Avoid undefined reference to 64-bit mul builtin on IA-32

hoangnova · Nov 6, 2020 · 1b280f8 · 1b280f8
1 parent 59825b3
commit 1b280f8
Showing 1 changed file with 6 additions and 2 deletions.
diff --git a/Library/OcGuardLib/BitOverflow.c b/Library/OcGuardLib/BitOverflow.c
@@ -319,9 +319,13 @@ OcOverflowMulS64 (
   INT64  *Result
   )
 {
-#if defined(OC_HAS_TYPE_GENERIC_BUILTINS)
+  //
+  // Intel 32-bit architectures do not have hardware signed 64-bit
+  // multiplication with overflow.
+  //
+#if defined(OC_HAS_TYPE_GENERIC_BUILTINS) && !defined(MDE_CPU_IA32)
   return __builtin_mul_overflow(A, B, Result);
-#elif defined(OC_HAS_TYPE_SPECIFIC_BUILTINS)
+#elif defined(OC_HAS_TYPE_SPECIFIC_BUILTINS) && !defined(MDE_CPU_IA32)
   return __builtin_smulll_overflow(A, B, Result);
 #else
   UINT64  AU;