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 23 namespace llvm { 24 using 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 35 extern "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. 40 void 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(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 char *Start = (char*) Addr; 71 char *End = Start + Len; 72 __builtin___clear_cache(Start, End); 73 # elif defined(__mips__) 74 cacheflush((char*)Addr, Len, BCACHE); 75 # endif 76 77 #endif // end apple 78 79 ValgrindDiscardTranslations(Addr, Len); 80 } 81
