[msan] Implement __sanitizer_unaligned_*.

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@183221 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 25 insertions, 0 deletions

diff --git a/lib/msan/msan.cc b/lib/msan/msan.cc
index 667090a4..95b9110b 100644
--- a/lib/msan/msan.cc
+++ b/lib/msan/msan.cc
@@ -459,6 +459,31 @@ u32 __msan_get_umr_origin() {
   return __msan_origin_tls;
 }
 
+u16 __sanitizer_unaligned_load16(const void *p) {
+  __msan_retval_tls[0] = *(u16 *)MEM_TO_SHADOW((uptr)p);
+  return *(u16 *)p;
+}
+u32 __sanitizer_unaligned_load32(const void *p) {
+  __msan_retval_tls[0] = *(u32 *)MEM_TO_SHADOW((uptr)p);
+  return *(u32 *)p;
+}
+u64 __sanitizer_unaligned_load64(const void *p) {
+  __msan_retval_tls[0] = *(u64 *)MEM_TO_SHADOW((uptr)p);
+  return *(u64 *)p;
+}
+void __sanitizer_unaligned_store16(void *p, u16 x) {
+  *(u16 *)MEM_TO_SHADOW((uptr)p) = __msan_param_tls[1];
+  *(u16 *)p = x;
+}
+void __sanitizer_unaligned_store32(void *p, u32 x) {
+  *(u32 *)MEM_TO_SHADOW((uptr)p) = __msan_param_tls[1];
+  *(u32 *)p = x;
+}
+void __sanitizer_unaligned_store64(void *p, u64 x) {
+  *(u64 *)MEM_TO_SHADOW((uptr)p) = __msan_param_tls[1];
+  *(u64 *)p = x;
+}
+
 #if !SANITIZER_SUPPORTS_WEAK_HOOKS
 extern "C" {
 SANITIZER_WEAK_ATTRIBUTE SANITIZER_INTERFACE_ATTRIBUTE