#include "ARMSubtarget.h"
#include "llvm/Function.h"
#include "llvm/CodeGen/JITCodeEmitter.h"
-#include "llvm/Config/alloca.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/ErrorHandling.h"
-#include "llvm/Support/Streams.h"
+#include "llvm/Support/raw_ostream.h"
#include "llvm/System/Memory.h"
#include <cstdlib>
using namespace llvm;
// CompilationCallback stub - We can't use a C function with inline assembly in
// it, because we the prolog/epilog inserted by GCC won't work for us (we need
// to preserve more context and manipulate the stack directly). Instead,
-// write our own wrapper, which does things our way, so we have complete
+// write our own wrapper, which does things our way, so we have complete
// control over register saving and restoring.
extern "C" {
#if defined(__arm__)
- void ARMCompilationCallback(void);
+ void ARMCompilationCallback();
asm(
".text\n"
".align 2\n"
// order for the registers.
// +--------+
// 0 | LR | Original return address
- // +--------+
+ // +--------+
// 1 | LR | Stub address (start of stub)
// 2-5 | R3..R0 | Saved registers (we need to preserve all regs)
// 6-20 | D0..D7 | Saved VFP registers
- // +--------+
+ // +--------+
//
#ifndef __SOFTFP__
// Restore VFP caller-saved registers.
);
#else // Not an ARM host
void ARMCompilationCallback() {
- LLVM_UNREACHABLE("Cannot call ARMCompilationCallback() on a non-ARM arch!\n");
+ llvm_unreachable("Cannot call ARMCompilationCallback() on a non-ARM arch!");
}
#endif
}
-/// ARMCompilationCallbackC - This is the target-specific function invoked
-/// by the function stub when we did not know the real target of a call.
-/// This function must locate the start of the stub or call site and pass
+/// ARMCompilationCallbackC - This is the target-specific function invoked
+/// by the function stub when we did not know the real target of a call.
+/// This function must locate the start of the stub or call site and pass
/// it into the JIT compiler function.
extern "C" void ARMCompilationCallbackC(intptr_t StubAddr) {
// Get the address of the compiled code for this function.
// ldr pc, [pc,#-4]
// <addr>
if (!sys::Memory::setRangeWritable((void*)StubAddr, 8)) {
- llvm_report_error("ERROR: Unable to mark stub writable");
+ llvm_unreachable("ERROR: Unable to mark stub writable");
}
*(intptr_t *)StubAddr = 0xe51ff004; // ldr pc, [pc, #-4]
*(intptr_t *)(StubAddr+4) = NewVal;
if (!sys::Memory::setRangeExecutable((void*)StubAddr, 8)) {
- llvm_report_error("ERROR: Unable to mark stub executable");
+ llvm_unreachable("ERROR: Unable to mark stub executable");
}
}
void *ARMJITInfo::emitGlobalValueIndirectSym(const GlobalValue *GV, void *Ptr,
JITCodeEmitter &JCE) {
JCE.startGVStub(GV, 4, 4);
+ intptr_t Addr = (intptr_t)JCE.getCurrentPCValue();
+ if (!sys::Memory::setRangeWritable((void*)Addr, 4)) {
+ llvm_unreachable("ERROR: Unable to mark indirect symbol writable");
+ }
JCE.emitWordLE((intptr_t)Ptr);
+ if (!sys::Memory::setRangeExecutable((void*)Addr, 4)) {
+ llvm_unreachable("ERROR: Unable to mark indirect symbol executable");
+ }
void *PtrAddr = JCE.finishGVStub(GV);
addIndirectSymAddr(Ptr, (intptr_t)PtrAddr);
return PtrAddr;
if (!LazyPtr) {
// In PIC mode, the function stub is loading a lazy-ptr.
LazyPtr= (intptr_t)emitGlobalValueIndirectSym((GlobalValue*)F, Fn, JCE);
- if (F)
- DOUT << "JIT: Indirect symbol emitted at [" << LazyPtr << "] for GV '"
- << F->getName() << "'\n";
- else
- DOUT << "JIT: Stub emitted at [" << LazyPtr
- << "] for external function at '" << Fn << "'\n";
+ DEBUG(if (F)
+ errs() << "JIT: Indirect symbol emitted at [" << LazyPtr
+ << "] for GV '" << F->getName() << "'\n";
+ else
+ errs() << "JIT: Stub emitted at [" << LazyPtr
+ << "] for external function at '" << Fn << "'\n");
}
JCE.startGVStub(F, 16, 4);
intptr_t Addr = (intptr_t)JCE.getCurrentPCValue();
+ if (!sys::Memory::setRangeWritable((void*)Addr, 16)) {
+ llvm_unreachable("ERROR: Unable to mark stub writable");
+ }
JCE.emitWordLE(0xe59fc004); // ldr pc, [pc, #+4]
JCE.emitWordLE(0xe08fc00c); // L_func$scv: add ip, pc, ip
JCE.emitWordLE(0xe59cf000); // ldr pc, [ip]
JCE.emitWordLE(LazyPtr - (Addr+4+8)); // func - (L_func$scv+8)
sys::Memory::InvalidateInstructionCache((void*)Addr, 16);
+ if (!sys::Memory::setRangeExecutable((void*)Addr, 16)) {
+ llvm_unreachable("ERROR: Unable to mark stub executable");
+ }
} else {
// The stub is 8-byte size and 4-aligned.
JCE.startGVStub(F, 8, 4);
intptr_t Addr = (intptr_t)JCE.getCurrentPCValue();
+ if (!sys::Memory::setRangeWritable((void*)Addr, 8)) {
+ llvm_unreachable("ERROR: Unable to mark stub writable");
+ }
JCE.emitWordLE(0xe51ff004); // ldr pc, [pc, #-4]
JCE.emitWordLE((intptr_t)Fn); // addr of function
sys::Memory::InvalidateInstructionCache((void*)Addr, 8);
+ if (!sys::Memory::setRangeExecutable((void*)Addr, 8)) {
+ llvm_unreachable("ERROR: Unable to mark stub executable");
+ }
}
} else {
// The compilation callback will overwrite the first two words of this
- // stub with indirect branch instructions targeting the compiled code.
+ // stub with indirect branch instructions targeting the compiled code.
// This stub sets the return address to restart the stub, so that
// the new branch will be invoked when we come back.
//
// The stub is 16-byte size and 4-byte aligned.
JCE.startGVStub(F, 16, 4);
intptr_t Addr = (intptr_t)JCE.getCurrentPCValue();
+ if (!sys::Memory::setRangeWritable((void*)Addr, 16)) {
+ llvm_unreachable("ERROR: Unable to mark stub writable");
+ }
// Save LR so the callback can determine which stub called it.
// The compilation callback is responsible for popping this prior
// to returning.
// The address of the compilation callback.
JCE.emitWordLE((intptr_t)ARMCompilationCallback);
sys::Memory::InvalidateInstructionCache((void*)Addr, 16);
+ if (!sys::Memory::setRangeExecutable((void*)Addr, 16)) {
+ llvm_unreachable("ERROR: Unable to mark stub executable");
+ }
}
return JCE.finishGVStub(F);
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