Bug 1447742: Understand movups in 32-bit DLL interceptor. r=handyman

xpcom/build/nsWindowsDllInterceptor.h

@@ -777,6 +777,18 @@ protected:
           return;
         }
         nOrigBytes += len;
+      } else if (origBytes[nOrigBytes] == 0x0f &&
+                 (origBytes[nOrigBytes + 1] == 0x10 ||
+                  origBytes[nOrigBytes + 1] == 0x11)) {
+        // SSE: movups xmm, xmm/m128
+        //      movups xmm/m128, xmm
+        nOrigBytes += 2;
+        int len = CountModRmSib(origBytes + nOrigBytes);
+        if (len < 0) {
+          MOZ_ASSERT_UNREACHABLE("Unrecognized MOV opcode sequence");
+          return;
+        }
+        nOrigBytes += len;
       } else if (origBytes[nOrigBytes] == 0xA1) {
         // MOV eax, [seg:offset]
         nOrigBytes += 5;
@@ -1262,14 +1274,14 @@ protected:
                  (origBytes[nOrigBytes + 1] & 0xf8) == 0x60) {
         // and [r+d], imm8
         COPY_CODES(5);
-      } else if (origBytes[nOrigBytes] == 0xc6) {
-        // mov [r+d], imm8
-        int len = CountModRmSib(&origBytes[nOrigBytes + 1]);
-        if (len < 0) {
-          // RIP-relative not yet supported
-          MOZ_ASSERT_UNREACHABLE("Unrecognized opcode sequence");
-          return;
-        }
+      } else if (origBytes[nOrigBytes] == 0xc6) {
+        // mov [r+d], imm8
+        int len = CountModRmSib(&origBytes[nOrigBytes + 1]);
+        if (len < 0) {
+          // RIP-relative not yet supported
+          MOZ_ASSERT_UNREACHABLE("Unrecognized opcode sequence");
+          return;
+        }
         COPY_CODES(len + 1);
       } else {
         MOZ_ASSERT_UNREACHABLE("Unrecognized opcode sequence");