#include "X86Relocations.h"
#include "X86Subtarget.h"
#include "llvm/Function.h"
-#include "llvm/CodeGen/MachineCodeEmitter.h"
#include "llvm/Config/alloca.h"
#include "llvm/Support/Compiler.h"
+#include "llvm/Support/ErrorHandling.h"
#include <cstdlib>
#include <cstring>
using namespace llvm;
#define ASMCALLSUFFIX
#endif
+// For ELF targets, use a .size and .type directive, to let tools
+// know the extent of functions defined in assembler.
+#if defined(__ELF__)
+# define SIZE(sym) ".size " #sym ", . - " #sym "\n"
+# define TYPE_FUNCTION(sym) ".type " #sym ", @function\n"
+#else
+# define SIZE(sym)
+# define TYPE_FUNCTION(sym)
+#endif
+
// Provide a convenient way for disabling usage of CFI directives.
// This is needed for old/broken assemblers (for example, gas on
// Darwin is pretty old and doesn't support these directives)
".text\n"
".align 8\n"
".globl " ASMPREFIX "X86CompilationCallback\n"
+ TYPE_FUNCTION(X86CompilationCallback)
ASMPREFIX "X86CompilationCallback:\n"
CFI(".cfi_startproc\n")
// Save RBP
CFI(".cfi_restore %rbp\n")
"ret\n"
CFI(".cfi_endproc\n")
+ SIZE(X86CompilationCallback)
);
# else
// No inline assembler support on this platform. The routine is in external
asm(
".text\n"
".align 8\n"
- ".globl " ASMPREFIX "X86CompilationCallback\n"
+ ".globl " ASMPREFIX "X86CompilationCallback\n"
+ TYPE_FUNCTION(X86CompilationCallback)
ASMPREFIX "X86CompilationCallback:\n"
CFI(".cfi_startproc\n")
"pushl %ebp\n"
CFI(".cfi_restore %ebp\n")
"ret\n"
CFI(".cfi_endproc\n")
+ SIZE(X86CompilationCallback)
);
// Same as X86CompilationCallback but also saves XMM argument registers.
asm(
".text\n"
".align 8\n"
- ".globl " ASMPREFIX "X86CompilationCallback_SSE\n"
+ ".globl " ASMPREFIX "X86CompilationCallback_SSE\n"
+ TYPE_FUNCTION(X86CompilationCallback_SSE)
ASMPREFIX "X86CompilationCallback_SSE:\n"
CFI(".cfi_startproc\n")
"pushl %ebp\n"
CFI(".cfi_restore %ebp\n")
"ret\n"
CFI(".cfi_endproc\n")
+ SIZE(X86CompilationCallback_SSE)
);
# else
void X86CompilationCallback2(intptr_t *StackPtr, intptr_t RetAddr);
#else // Not an i386 host
void X86CompilationCallback() {
- assert(0 && "Cannot call X86CompilationCallback() on a non-x86 arch!\n");
- abort();
+ LLVM_UNREACHABLE("Cannot call X86CompilationCallback() on a non-x86 arch!");
}
#endif
}
-/// X86CompilationCallback - This is the target-specific function invoked by the
+/// X86CompilationCallback2 - 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.
}
void *X86JITInfo::emitGlobalValueIndirectSym(const GlobalValue* GV, void *ptr,
- MachineCodeEmitter &MCE) {
+ JITCodeEmitter &JCE) {
#if defined (X86_64_JIT)
- MCE.startGVStub(GV, 8, 8);
- MCE.emitWordLE((unsigned)(intptr_t)ptr);
- MCE.emitWordLE((unsigned)(((intptr_t)ptr) >> 32));
+ JCE.startGVStub(GV, 8, 8);
+ JCE.emitWordLE((unsigned)(intptr_t)ptr);
+ JCE.emitWordLE((unsigned)(((intptr_t)ptr) >> 32));
#else
- MCE.startGVStub(GV, 4, 4);
- MCE.emitWordLE((intptr_t)ptr);
+ JCE.startGVStub(GV, 4, 4);
+ JCE.emitWordLE((intptr_t)ptr);
#endif
- return MCE.finishGVStub(GV);
+ return JCE.finishGVStub(GV);
}
void *X86JITInfo::emitFunctionStub(const Function* F, void *Fn,
- MachineCodeEmitter &MCE) {
+ JITCodeEmitter &JCE) {
// Note, we cast to intptr_t here to silence a -pedantic warning that
// complains about casting a function pointer to a normal pointer.
#if defined (X86_32_JIT) && !defined (_MSC_VER)
#endif
if (NotCC) {
#if defined (X86_64_JIT)
- MCE.startGVStub(F, 13, 4);
- MCE.emitByte(0x49); // REX prefix
- MCE.emitByte(0xB8+2); // movabsq r10
- MCE.emitWordLE((unsigned)(intptr_t)Fn);
- MCE.emitWordLE((unsigned)(((intptr_t)Fn) >> 32));
- MCE.emitByte(0x41); // REX prefix
- MCE.emitByte(0xFF); // jmpq *r10
- MCE.emitByte(2 | (4 << 3) | (3 << 6));
+ JCE.startGVStub(F, 13, 4);
+ JCE.emitByte(0x49); // REX prefix
+ JCE.emitByte(0xB8+2); // movabsq r10
+ JCE.emitWordLE((unsigned)(intptr_t)Fn);
+ JCE.emitWordLE((unsigned)(((intptr_t)Fn) >> 32));
+ JCE.emitByte(0x41); // REX prefix
+ JCE.emitByte(0xFF); // jmpq *r10
+ JCE.emitByte(2 | (4 << 3) | (3 << 6));
#else
- MCE.startGVStub(F, 5, 4);
- MCE.emitByte(0xE9);
- MCE.emitWordLE((intptr_t)Fn-MCE.getCurrentPCValue()-4);
+ JCE.startGVStub(F, 5, 4);
+ JCE.emitByte(0xE9);
+ JCE.emitWordLE((intptr_t)Fn-JCE.getCurrentPCValue()-4);
#endif
- return MCE.finishGVStub(F);
+ return JCE.finishGVStub(F);
}
#if defined (X86_64_JIT)
- MCE.startGVStub(F, 14, 4);
- MCE.emitByte(0x49); // REX prefix
- MCE.emitByte(0xB8+2); // movabsq r10
- MCE.emitWordLE((unsigned)(intptr_t)Fn);
- MCE.emitWordLE((unsigned)(((intptr_t)Fn) >> 32));
- MCE.emitByte(0x41); // REX prefix
- MCE.emitByte(0xFF); // callq *r10
- MCE.emitByte(2 | (2 << 3) | (3 << 6));
+ JCE.startGVStub(F, 14, 4);
+ JCE.emitByte(0x49); // REX prefix
+ JCE.emitByte(0xB8+2); // movabsq r10
+ JCE.emitWordLE((unsigned)(intptr_t)Fn);
+ JCE.emitWordLE((unsigned)(((intptr_t)Fn) >> 32));
+ JCE.emitByte(0x41); // REX prefix
+ JCE.emitByte(0xFF); // callq *r10
+ JCE.emitByte(2 | (2 << 3) | (3 << 6));
#else
- MCE.startGVStub(F, 6, 4);
- MCE.emitByte(0xE8); // Call with 32 bit pc-rel destination...
+ JCE.startGVStub(F, 6, 4);
+ JCE.emitByte(0xE8); // Call with 32 bit pc-rel destination...
- MCE.emitWordLE((intptr_t)Fn-MCE.getCurrentPCValue()-4);
+ JCE.emitWordLE((intptr_t)Fn-JCE.getCurrentPCValue()-4);
#endif
- MCE.emitByte(0xCD); // Interrupt - Just a marker identifying the stub!
- return MCE.finishGVStub(F);
+ JCE.emitByte(0xCD); // Interrupt - Just a marker identifying the stub!
+ return JCE.finishGVStub(F);
+}
+
+void X86JITInfo::emitFunctionStubAtAddr(const Function* F, void *Fn, void *Stub,
+ JITCodeEmitter &JCE) {
+ // Note, we cast to intptr_t here to silence a -pedantic warning that
+ // complains about casting a function pointer to a normal pointer.
+ JCE.startGVStub(F, Stub, 5);
+ JCE.emitByte(0xE9);
+#if defined (X86_64_JIT)
+ assert(((((intptr_t)Fn-JCE.getCurrentPCValue()-5) << 32) >> 32) ==
+ ((intptr_t)Fn-JCE.getCurrentPCValue()-5)
+ && "PIC displacement does not fit in displacement field!");
+#endif
+ JCE.emitWordLE((intptr_t)Fn-JCE.getCurrentPCValue()-4);
+ JCE.finishGVStub(F);
}
/// getPICJumpTableEntry - Returns the value of the jumptable entry for the
TLSOffset -= size;
return TLSOffset;
#else
- assert(0 && "Cannot allocate thread local storage on this arch!\n");
+ LLVM_UNREACHABLE("Cannot allocate thread local storage on this arch!");
return 0;
#endif
}
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