RTDyldMemoryManager.cpp [plain text]
#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__
#ifdef HAVE_SYS_STAT_H
#include <sys/stat.h>
#endif
#include <fcntl.h>
#include <unistd.h>
#endif
namespace llvm {
RTDyldMemoryManager::~RTDyldMemoryManager() {}
#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
#endif
#if HAVE_EHTABLE_SUPPORT
extern "C" void __register_frame(void *);
extern "C" void __deregister_frame(void *);
#else
void __register_frame(void *p) {
static bool Searched = false;
static void((*rf)(void *)) = 0;
if (!Searched) {
Searched = true;
*(void **)&rf =
llvm::sys::DynamicLibrary::SearchForAddressOfSymbol("__register_frame");
}
if (rf)
rf(p);
}
void __deregister_frame(void *p) {
static bool Searched = false;
static void((*df)(void *)) = 0;
if (!Searched) {
Searched = true;
*(void **)&df = llvm::sys::DynamicLibrary::SearchForAddressOfSymbol(
"__deregister_frame");
}
if (df)
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) {
if (isDeregister)
__deregister_frame(const_cast<char *>(Entry));
else
__register_frame(const_cast<char *>(Entry));
}
return P + Length;
}
void RTDyldMemoryManager::registerEHFramesInProcess(uint8_t *Addr,
size_t Size) {
const char *P = (const char *)Addr;
const char *End = P + Size;
do {
P = processFDE(P, false);
} while(P != End);
}
void RTDyldMemoryManager::deregisterEHFramesInProcess(uint8_t *Addr,
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::registerEHFramesInProcess(uint8_t *Addr,
size_t Size) {
__register_frame(Addr);
}
void RTDyldMemoryManager::deregisterEHFramesInProcess(uint8_t *Addr,
size_t Size) {
__deregister_frame(Addr);
}
#endif
static int jit_noop() {
return 0;
}
#if defined(__BIONIC__) && defined(__arm__)
#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)
#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) {
#if defined(__linux__) && defined(__GLIBC__)
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__)
if (&__morestack && Name == "__morestack")
return (uint64_t)&__morestack;
#endif
#endif // __linux__ && __GLIBC__
#if defined(__BIONIC__) && defined(__arm__)
if (Name.compare(0, 8, "__aeabi_") == 0) {
#define ARM_MATH_CHECK(fn) if (Name == #fn) return (uint64_t)&fn;
ARM_MATH_IMPORTS(ARM_MATH_CHECK)
#undef ARM_MATH_CHECK
}
#endif
if (Name == "__main") return (uint64_t)&jit_noop;
const char *NameStr = Name.c_str();
#ifdef __APPLE__
if (NameStr[0] == '_')
++NameStr;
#endif
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 (void*)Addr;
}
}