//
//===----------------------------------------------------------------------===//
+#include "llvm/Config/config.h"
#include "llvm/ExecutionEngine/RTDyldMemoryManager.h"
+#include "llvm/Support/Compiler.h"
#include "llvm/Support/DynamicLibrary.h"
#include "llvm/Support/ErrorHandling.h"
+#include <cstdlib>
#ifdef __linux__
- // These includes used by SectionMemoryManager::getPointerToNamedFunction()
+ // These includes used by RTDyldMemoryManager::getPointerToNamedFunction()
// for Glibc trickery. See comments in this function for more information.
#ifdef HAVE_SYS_STAT_H
#include <sys/stat.h>
RTDyldMemoryManager::~RTDyldMemoryManager() {}
// Determine whether we can register EH tables.
-#if (defined(__GNUC__) && !defined(__ARM_EABI__) && \
- !defined(__USING_SJLJ_EXCEPTIONS__))
+#if (defined(__GNUC__) && !defined(__ARM_EABI__) && !defined(__ia64__) && \
+ !defined(__SEH__) && !defined(__USING_SJLJ_EXCEPTIONS__))
#define HAVE_EHTABLE_SUPPORT 1
#else
#define HAVE_EHTABLE_SUPPORT 0
#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);
+}
+
+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
-static const char *processFDE(const char *Entry) {
+#ifdef __APPLE__
+
+static const char *processFDE(const char *Entry, bool isDeregister) {
const char *P = Entry;
- uint32_t Length = *((uint32_t*)P);
+ uint32_t Length = *((const uint32_t *)P);
P += 4;
- uint32_t Offset = *((uint32_t*)P);
- if (Offset != 0)
- __register_frame((void*)Entry);
+ uint32_t Offset = *((const uint32_t *)P);
+ if (Offset != 0) {
+ if (isDeregister)
+ __deregister_frame(const_cast<char *>(Entry));
+ else
+ __register_frame(const_cast<char *>(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);
+}
+
+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);
-#endif
}
+#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;
}
-void *RTDyldMemoryManager::getPointerToNamedFunction(const std::string &Name,
- bool AbortOnFailure) {
-#if defined(__linux__)
+// 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
+
+#if defined(__linux__) && defined(__GLIBC__) && \
+ (defined(__i386__) || defined(__x86_64__))
+extern "C" LLVM_ATTRIBUTE_WEAK void __morestack();
+#endif
+
+uint64_t
+RTDyldMemoryManager::getSymbolAddressInProcess(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__) && defined(__GLIBC__)
//===--------------------------------------------------------------------===//
// Function stubs that are invoked instead of certain library calls
//
// not inlined, and hiding their real definitions in a separate archive file
// that the dynamic linker can't see. For more info, search for
// 'libc_nonshared.a' on Google, or read http://llvm.org/PR274.
- if (Name == "stat") return (void*)(intptr_t)&stat;
- if (Name == "fstat") return (void*)(intptr_t)&fstat;
- if (Name == "lstat") return (void*)(intptr_t)&lstat;
- if (Name == "stat64") return (void*)(intptr_t)&stat64;
- if (Name == "fstat64") return (void*)(intptr_t)&fstat64;
- if (Name == "lstat64") return (void*)(intptr_t)&lstat64;
- if (Name == "atexit") return (void*)(intptr_t)&atexit;
- if (Name == "mknod") return (void*)(intptr_t)&mknod;
-#endif // __linux__
+ if (Name == "stat") return (uint64_t)&stat;
+ if (Name == "fstat") return (uint64_t)&fstat;
+ if (Name == "lstat") return (uint64_t)&lstat;
+ if (Name == "stat64") return (uint64_t)&stat64;
+ if (Name == "fstat64") return (uint64_t)&fstat64;
+ if (Name == "lstat64") return (uint64_t)&lstat64;
+ if (Name == "atexit") return (uint64_t)&atexit;
+ if (Name == "mknod") return (uint64_t)&mknod;
+
+#if defined(__i386__) || defined(__x86_64__)
+ // __morestack lives in libgcc, a static library.
+ if (&__morestack && Name == "__morestack")
+ return (uint64_t)&__morestack;
+#endif
+#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
// (and register wrong callee's dtors with atexit(3)).
// We expect ExecutionEngine::runStaticConstructorsDestructors()
// is called before ExecutionEngine::runFunctionAsMain() is called.
- if (Name == "__main") return (void*)(intptr_t)&jit_noop;
+ if (Name == "__main") return (uint64_t)&jit_noop;
+
+ // Try to demangle Name before looking it up in the process, otherwise symbol
+ // '_<Name>' (if present) will shadow '<Name>', and there will be no way to
+ // refer to the latter.
const char *NameStr = Name.c_str();
- void *Ptr = sys::DynamicLibrary::SearchForAddressOfSymbol(NameStr);
- if (Ptr) return Ptr;
-
- // If it wasn't found and if it starts with an underscore ('_') character,
- // try again without the underscore.
- if (NameStr[0] == '_') {
- Ptr = sys::DynamicLibrary::SearchForAddressOfSymbol(NameStr+1);
- if (Ptr) return Ptr;
- }
- if (AbortOnFailure)
+ if (NameStr[0] == '_')
+ if (void *Ptr = sys::DynamicLibrary::SearchForAddressOfSymbol(NameStr + 1))
+ return (uint64_t)Ptr;
+
+ // If we Name did not require demangling, or we failed to find the demangled
+ // name, try again without demangling.
+ return (uint64_t)sys::DynamicLibrary::SearchForAddressOfSymbol(NameStr);
+}
+
+void *RTDyldMemoryManager::getPointerToNamedFunction(const std::string &Name,
+ bool AbortOnFailure) {
+ uint64_t Addr = getSymbolAddress(Name);
+
+ if (!Addr && AbortOnFailure)
report_fatal_error("Program used external function '" + Name +
"' which could not be resolved!");
- return 0;
+ return (void*)Addr;
}
} // namespace llvm
projects / oota-llvm.git / blobdiff