X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=lib%2FSystem%2FMemory.cpp;h=ef23b8d12aabdbe38d65fe878b0f8bf7acfdd44a;hb=87e0697a46ad214be0d8fce0955494f4085de95a;hp=2ec5666cedfcde8b6c0883b05f34cb3473e2d8bf;hpb=f976c856fcc5055f3fc7d9f070d72c2d027c1d9d;p=oota-llvm.git

diff --git a/lib/System/Memory.cpp b/lib/System/Memory.cpp
index 2ec5666cedf..ef23b8d12aa 100644
--- a/lib/System/Memory.cpp
+++ b/lib/System/Memory.cpp
@@ -2,8 +2,8 @@
 //
 //                     The LLVM Compiler Infrastructure
 //
-// This file was developed by Reid Spencer and is distributed under the
-// University of Illinois Open Source License. See LICENSE.TXT for details.
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 //
@@ -13,16 +13,11 @@
 //===----------------------------------------------------------------------===//
 
 #include "llvm/System/Memory.h"
+#include "llvm/System/Valgrind.h"
 #include "llvm/Config/config.h"
 
 namespace llvm {
 using namespace sys;
-
-//===----------------------------------------------------------------------===//
-//=== WARNING: Implementation here must contain only TRULY operating system
-//===          independent code.
-//===----------------------------------------------------------------------===//
-
 }
 
 // Include the platform-specific parts of this class.
@@ -33,4 +28,47 @@ using namespace sys;
 #include "Win32/Memory.inc"
 #endif
 
-// vim: sw=2 smartindent smarttab tw=80 autoindent expandtab
+extern "C" void sys_icache_invalidate(const void *Addr, size_t len);
+
+/// InvalidateInstructionCache - Before the JIT can run a block of code
+/// that has been emitted it must invalidate the instruction cache on some
+/// platforms.
+void llvm::sys::Memory::InvalidateInstructionCache(const void *Addr,
+                                                   size_t Len) {
+  
+// icache invalidation for PPC and ARM.
+#if defined(__APPLE__)
+
+#  if (defined(__POWERPC__) || defined (__ppc__) || \
+     defined(_POWER) || defined(_ARCH_PPC)) || defined(__arm__)
+  sys_icache_invalidate(Addr, Len);
+#  endif
+
+#else
+
+#  if (defined(__POWERPC__) || defined (__ppc__) || \
+       defined(_POWER) || defined(_ARCH_PPC)) && defined(__GNUC__)
+  const size_t LineSize = 32;
+
+  const intptr_t Mask = ~(LineSize - 1);
+  const intptr_t StartLine = ((intptr_t) Addr) & Mask;
+  const intptr_t EndLine = ((intptr_t) Addr + Len + LineSize - 1) & Mask;
+
+  for (intptr_t Line = StartLine; Line < EndLine; Line += LineSize)
+    asm volatile("dcbf 0, %0" : : "r"(Line));
+  asm volatile("sync");
+
+  for (intptr_t Line = StartLine; Line < EndLine; Line += LineSize)
+    asm volatile("icbi 0, %0" : : "r"(Line));
+  asm volatile("isync");
+#  elif defined(__arm__) && defined(__GNUC__)
+  // FIXME: Can we safely always call this for __GNUC__ everywhere?
+  char *Start = (char*) Addr;
+  char *End = Start + Len;
+  __clear_cache(Start, End);
+#  endif
+
+#endif  // end apple
+
+  ValgrindDiscardTranslations(Addr, Len);
+}