1//===- Memory.cpp - Memory Handling Support ---------------------*- C++ -*-===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9// 10// This file defines some helpful functions for allocating memory and dealing 11// with memory mapped files 12// 13//===----------------------------------------------------------------------===// 14 15#include "llvm/Support/Memory.h" 16#include "llvm/Support/Valgrind.h" 17#include "llvm/Config/config.h" 18 19#if defined(__mips__) 20#include <sys/cachectl.h> 21#endif 22 23namespace llvm { 24using namespace sys; 25} 26 27// Include the platform-specific parts of this class. 28#ifdef LLVM_ON_UNIX 29#include "Unix/Memory.inc" 30#endif 31#ifdef LLVM_ON_WIN32 32#include "Windows/Memory.inc" 33#endif 34 35extern "C" void sys_icache_invalidate(const void *Addr, size_t len); 36 37/// InvalidateInstructionCache - Before the JIT can run a block of code 38/// that has been emitted it must invalidate the instruction cache on some 39/// platforms. 40void llvm::sys::Memory::InvalidateInstructionCache(const void *Addr, 41 size_t Len) { 42 43// icache invalidation for PPC and ARM. 44#if defined(__APPLE__) 45 46# if (defined(__POWERPC__) || defined (__ppc__) || \ 47 defined(_POWER) || defined(_ARCH_PPC)) || defined(__arm__) 48 sys_icache_invalidate(const_cast<void *>(Addr), Len); 49# endif 50 51#else 52 53# if (defined(__POWERPC__) || defined (__ppc__) || \ 54 defined(_POWER) || defined(_ARCH_PPC)) && defined(__GNUC__) 55 const size_t LineSize = 32; 56 57 const intptr_t Mask = ~(LineSize - 1); 58 const intptr_t StartLine = ((intptr_t) Addr) & Mask; 59 const intptr_t EndLine = ((intptr_t) Addr + Len + LineSize - 1) & Mask; 60 61 for (intptr_t Line = StartLine; Line < EndLine; Line += LineSize) 62 asm volatile("dcbf 0, %0" : : "r"(Line)); 63 asm volatile("sync"); 64 65 for (intptr_t Line = StartLine; Line < EndLine; Line += LineSize) 66 asm volatile("icbi 0, %0" : : "r"(Line)); 67 asm volatile("isync"); 68# elif defined(__arm__) && defined(__GNUC__) 69 // FIXME: Can we safely always call this for __GNUC__ everywhere? 70 const char *Start = static_cast<const char *>(Addr); 71 const char *End = Start + Len; 72 __clear_cache(const_cast<char *>(Start), const_cast<char *>(End)); 73# elif defined(__mips__) && defined(ANDROID) 74 // NOTE: The declaration of "cacheflush" in bionic: 75 // extern int cacheflush(long start, long end, long flags); 76 cacheflush((long)Addr, (long)(Addr+Len), BCACHE); 77# elif defined(__mips__) 78 const char *Start = static_cast<const char *>(Addr); 79 cacheflush(const_cast<char *>(Start), Len, BCACHE); 80# endif 81 82#endif // end apple 83 84 ValgrindDiscardTranslations(Addr, Len); 85} 86