X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=lib%2FExecutionEngine%2FRTDyldMemoryManager.cpp;h=1646937e816cd72787e709cfd86cacb90b9d956f;hb=94ce368a5e01c8f135e66e9155f31aa331f22cbe;hp=de38b38d64ba2ad1030a477a0e1cde717820ab9d;hpb=8e9ec015348c5419b905c2ca6e39534429eda073;p=oota-llvm.git diff --git a/lib/ExecutionEngine/RTDyldMemoryManager.cpp b/lib/ExecutionEngine/RTDyldMemoryManager.cpp index de38b38d64b..1646937e816 100644 --- a/lib/ExecutionEngine/RTDyldMemoryManager.cpp +++ b/lib/ExecutionEngine/RTDyldMemoryManager.cpp @@ -15,7 +15,6 @@ #include "llvm/ExecutionEngine/RTDyldMemoryManager.h" #include "llvm/Support/DynamicLibrary.h" #include "llvm/Support/ErrorHandling.h" - #include #ifdef __linux__ @@ -34,7 +33,7 @@ RTDyldMemoryManager::~RTDyldMemoryManager() {} // Determine whether we can register EH tables. #if (defined(__GNUC__) && !defined(__ARM_EABI__) && !defined(__ia64__) && \ - !defined(__USING_SJLJ_EXCEPTIONS__)) + !defined(__SEH__) && !defined(__USING_SJLJ_EXCEPTIONS__)) #define HAVE_EHTABLE_SUPPORT 1 #else #define HAVE_EHTABLE_SUPPORT 0 @@ -42,37 +41,180 @@ RTDyldMemoryManager::~RTDyldMemoryManager() {} #if HAVE_EHTABLE_SUPPORT extern "C" void __register_frame(void*); +extern "C" void __deregister_frame(void*); +#else +// The building compiler does not have __(de)register_frame but +// it may be found at runtime in a dynamically-loaded library. +// For example, this happens when building LLVM with Visual C++ +// but using the MingW runtime. +void __register_frame(void *p) { + static bool Searched = false; + static void *rf = 0; + + if (!Searched) { + Searched = true; + rf = llvm::sys::DynamicLibrary::SearchForAddressOfSymbol( + "__register_frame"); + } + if (rf) + ((void (*)(void *))rf)(p); +} -static const char *processFDE(const char *Entry) { +void __deregister_frame(void *p) { + static bool Searched = false; + static void *df = 0; + + if (!Searched) { + Searched = true; + df = llvm::sys::DynamicLibrary::SearchForAddressOfSymbol( + "__deregister_frame"); + } + if (df) + ((void (*)(void *))df)(p); +} +#endif + +#ifdef __APPLE__ + +static const char *processFDE(const char *Entry, bool isDeregister) { const char *P = Entry; uint32_t Length = *((const uint32_t *)P); P += 4; uint32_t Offset = *((const uint32_t *)P); - if (Offset != 0) - __register_frame(const_cast(Entry)); + if (Offset != 0) { + if (isDeregister) + __deregister_frame(const_cast(Entry)); + else + __register_frame(const_cast(Entry)); + } return P + Length; } -#endif -void RTDyldMemoryManager::registerEHFrames(StringRef SectionData) { -#if HAVE_EHTABLE_SUPPORT - const char *P = SectionData.data(); - const char *End = SectionData.data() + SectionData.size(); +// This implementation handles frame registration for local targets. +// Memory managers for remote targets should re-implement this function +// and use the LoadAddr parameter. +void RTDyldMemoryManager::registerEHFrames(uint8_t *Addr, + uint64_t LoadAddr, + size_t Size) { + // On OS X OS X __register_frame takes a single FDE as an argument. + // See http://lists.cs.uiuc.edu/pipermail/llvmdev/2013-April/061768.html + const char *P = (const char *)Addr; + const char *End = P + Size; do { - P = processFDE(P); + P = processFDE(P, false); } while(P != End); -#endif } +void RTDyldMemoryManager::deregisterEHFrames(uint8_t *Addr, + uint64_t LoadAddr, + size_t Size) { + const char *P = (const char *)Addr; + const char *End = P + Size; + do { + P = processFDE(P, true); + } while(P != End); +} + +#else + +void RTDyldMemoryManager::registerEHFrames(uint8_t *Addr, + uint64_t LoadAddr, + size_t Size) { + // On Linux __register_frame takes a single argument: + // a pointer to the start of the .eh_frame section. + + // How can it find the end? Because crtendS.o is linked + // in and it has an .eh_frame section with four zero chars. + __register_frame(Addr); +} + +void RTDyldMemoryManager::deregisterEHFrames(uint8_t *Addr, + uint64_t LoadAddr, + size_t Size) { + __deregister_frame(Addr); +} + +#endif + static int jit_noop() { return 0; } +// ARM math functions are statically linked on Android from libgcc.a, but not +// available at runtime for dynamic linking. On Linux these are usually placed +// in libgcc_s.so so can be found by normal dynamic lookup. +#if defined(__BIONIC__) && defined(__arm__) +// List of functions which are statically linked on Android and can be generated +// by LLVM. This is done as a nested macro which is used once to declare the +// imported functions with ARM_MATH_DECL and once to compare them to the +// user-requested symbol in getSymbolAddress with ARM_MATH_CHECK. The test +// assumes that all functions start with __aeabi_ and getSymbolAddress must be +// modified if that changes. +#define ARM_MATH_IMPORTS(PP) \ + PP(__aeabi_d2f) \ + PP(__aeabi_d2iz) \ + PP(__aeabi_d2lz) \ + PP(__aeabi_d2uiz) \ + PP(__aeabi_d2ulz) \ + PP(__aeabi_dadd) \ + PP(__aeabi_dcmpeq) \ + PP(__aeabi_dcmpge) \ + PP(__aeabi_dcmpgt) \ + PP(__aeabi_dcmple) \ + PP(__aeabi_dcmplt) \ + PP(__aeabi_dcmpun) \ + PP(__aeabi_ddiv) \ + PP(__aeabi_dmul) \ + PP(__aeabi_dsub) \ + PP(__aeabi_f2d) \ + PP(__aeabi_f2iz) \ + PP(__aeabi_f2lz) \ + PP(__aeabi_f2uiz) \ + PP(__aeabi_f2ulz) \ + PP(__aeabi_fadd) \ + PP(__aeabi_fcmpeq) \ + PP(__aeabi_fcmpge) \ + PP(__aeabi_fcmpgt) \ + PP(__aeabi_fcmple) \ + PP(__aeabi_fcmplt) \ + PP(__aeabi_fcmpun) \ + PP(__aeabi_fdiv) \ + PP(__aeabi_fmul) \ + PP(__aeabi_fsub) \ + PP(__aeabi_i2d) \ + PP(__aeabi_i2f) \ + PP(__aeabi_idiv) \ + PP(__aeabi_idivmod) \ + PP(__aeabi_l2d) \ + PP(__aeabi_l2f) \ + PP(__aeabi_lasr) \ + PP(__aeabi_ldivmod) \ + PP(__aeabi_llsl) \ + PP(__aeabi_llsr) \ + PP(__aeabi_lmul) \ + PP(__aeabi_ui2d) \ + PP(__aeabi_ui2f) \ + PP(__aeabi_uidiv) \ + PP(__aeabi_uidivmod) \ + PP(__aeabi_ul2d) \ + PP(__aeabi_ul2f) \ + PP(__aeabi_uldivmod) + +// Declare statically linked math functions on ARM. The function declarations +// here do not have the correct prototypes for each function in +// ARM_MATH_IMPORTS, but it doesn't matter because only the symbol addresses are +// needed. In particular the __aeabi_*divmod functions do not have calling +// conventions which match any C prototype. +#define ARM_MATH_DECL(name) extern "C" void name(); +ARM_MATH_IMPORTS(ARM_MATH_DECL) +#undef ARM_MATH_DECL +#endif + uint64_t RTDyldMemoryManager::getSymbolAddress(const std::string &Name) { // This implementation assumes that the host program is the target. // Clients generating code for a remote target should implement their own // memory manager. -#if defined(__linux__) +#if defined(__linux__) && defined(__GLIBC__) //===--------------------------------------------------------------------===// // Function stubs that are invoked instead of certain library calls // @@ -90,7 +232,18 @@ uint64_t RTDyldMemoryManager::getSymbolAddress(const std::string &Name) { if (Name == "lstat64") return (uint64_t)&lstat64; if (Name == "atexit") return (uint64_t)&atexit; if (Name == "mknod") return (uint64_t)&mknod; -#endif // __linux__ +#endif // __linux__ && __GLIBC__ + + // See ARM_MATH_IMPORTS definition for explanation +#if defined(__BIONIC__) && defined(__arm__) + if (Name.compare(0, 8, "__aeabi_") == 0) { + // Check if the user has requested any of the functions listed in + // ARM_MATH_IMPORTS, and if so redirect to the statically linked symbol. +#define ARM_MATH_CHECK(fn) if (Name == #fn) return (uint64_t)&fn; + ARM_MATH_IMPORTS(ARM_MATH_CHECK) +#undef ARM_MATH_CHECK + } +#endif // We should not invoke parent's ctors/dtors from generated main()! // On Mingw and Cygwin, the symbol __main is resolved to