This patch adds memory support functions which will later be used to implement section-specific protection handling in MCJIT.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@164249 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 0 insertions, 52 deletions

diff --git a/lib/Support/Memory.cpp b/lib/Support/Memory.cpp
index 3cc8f5ee7b..12f083822f 100644
--- a/lib/Support/Memory.cpp
+++ b/lib/Support/Memory.cpp
@@ -16,10 +16,6 @@
 #include "llvm/Support/Valgrind.h"
 #include "llvm/Config/config.h"
 
-namespace llvm {
-using namespace sys;
-}
-
 // Include the platform-specific parts of this class.
 #ifdef LLVM_ON_UNIX
 #include "Unix/Memory.inc"
@@ -27,51 +23,3 @@ using namespace sys;
 #ifdef LLVM_ON_WIN32
 #include "Windows/Memory.inc"
 #endif
-
-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(const_cast<void *>(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?
-  const char *Start = static_cast<const char *>(Addr);
-  const char *End = Start + Len;
-  __clear_cache(const_cast<char *>(Start), const_cast<char *>(End));
-#  elif defined(__mips__)
-  const char *Start = static_cast<const char *>(Addr);
-  cacheflush(const_cast<char *>(Start), Len, BCACHE);
-#  endif
-
-#endif  // end apple
-
-  ValgrindDiscardTranslations(Addr, Len);
-}