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Code cleanup. Provide generic way of selecting JIT pointer bitwidth regardless

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of compiler used.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48702 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Anton Korobeynikov 2008-03-23 13:40:45 +00:00
parent 6aeedfd0f5
commit fd9d976d74
1 changed files with 30 additions and 22 deletions
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52
lib/Target/X86/X86JITInfo.cpp
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@ -21,9 +21,11 @@
#include <cstring>
using namespace llvm;
#ifdef _MSC_VER
extern "C" void *_AddressOfReturnAddress(void);
#pragma intrinsic(_AddressOfReturnAddress)
// Determine the platform we're running on
#if defined (__x86_64__) || defined (_M_AMD64)
# define X86_64_JIT
#elif defined(__i386__) || defined(i386) || defined(_M_IX86)
# define X86_32_JIT
#endif
void X86JITInfo::replaceMachineCodeForFunction(void *Old, void *New) {
@ -63,7 +65,8 @@ static TargetJITInfo::JITCompilerFn JITCompilerFunction;
// Provide a wrapper for X86CompilationCallback2 that saves non-traditional
// callee saved registers, for the fastcc calling convention.
extern "C" {
#if defined(__x86_64__)
#if defined(X86_64_JIT)
# ifndef _MSC_VER
// No need to save EAX/EDX for X86-64.
void X86CompilationCallback(void);
asm(
@ -149,8 +152,15 @@ extern "C" {
"ret\n"
CFI(".cfi_endproc\n")
);
#elif defined(__i386__) || defined(i386) || defined(_M_IX86)
#ifndef _MSC_VER
# else
// No inline assembler support on this platform
void X86CompilationCallback() {
assert(0 && "Cannot call X86CompilationCallback() on a non-x86 arch!\n");
abort();
}
# endif
#elif defined (X86_32_JIT)
# ifndef _MSC_VER
void X86CompilationCallback(void);
asm(
".text\n"
@ -169,9 +179,9 @@ extern "C" {
CFI(".cfi_rel_offset %edx, 4\n")
"pushl %ecx\n"
CFI(".cfi_rel_offset %ecx, 8\n")
#if defined(__APPLE__)
# if defined(__APPLE__)
"andl $-16, %esp\n" // Align ESP on 16-byte boundary
#endif
# endif
"subl $16, %esp\n"
"movl 4(%ebp), %eax\n" // Pass prev frame and return address
"movl %eax, 4(%esp)\n"
@ -259,7 +269,7 @@ extern "C" {
"ret\n"
CFI(".cfi_endproc\n")
);
#else
# else
void X86CompilationCallback2(intptr_t *StackPtr, intptr_t RetAddr);
_declspec(naked) void X86CompilationCallback(void) {
@ -284,7 +294,7 @@ extern "C" {
}
}
#endif // _MSC_VER
# endif // _MSC_VER
#else // Not an i386 host
void X86CompilationCallback() {
@ -307,7 +317,7 @@ extern "C" void X86CompilationCallback2(intptr_t *StackPtr, intptr_t RetAddr) {
bool isStub = ((unsigned char*)RetAddr)[0] == 0xCD;
// The call instruction should have pushed the return value onto the stack...
#ifdef __x86_64__
#if defined (X86_64_JIT)
RetAddr--; // Backtrack to the reference itself...
#else
RetAddr -= 4; // Backtrack to the reference itself...
@ -321,7 +331,7 @@ extern "C" void X86CompilationCallback2(intptr_t *StackPtr, intptr_t RetAddr) {
#endif
// Sanity check to make sure this really is a call instruction.
#ifdef __x86_64__
#if defined (X86_64_JIT)
assert(((unsigned char*)RetAddr)[-2] == 0x41 &&"Not a call instr!");
assert(((unsigned char*)RetAddr)[-1] == 0xFF &&"Not a call instr!");
#else
@ -332,7 +342,7 @@ extern "C" void X86CompilationCallback2(intptr_t *StackPtr, intptr_t RetAddr) {
// Rewrite the call target... so that we don't end up here every time we
// execute the call.
#ifdef __x86_64__
#if defined (X86_64_JIT)
*(intptr_t *)(RetAddr - 0xa) = NewVal;
#else
*(intptr_t *)RetAddr = (intptr_t)(NewVal-RetAddr-4);
@ -343,7 +353,7 @@ extern "C" void X86CompilationCallback2(intptr_t *StackPtr, intptr_t RetAddr) {
// instruction so that two return addresses are not pushed onto the stack
// when the requested function finally gets called. This also makes the
// 0xCD byte (interrupt) dead, so the marker doesn't effect anything.
#ifdef __x86_64__
#if defined (X86_64_JIT)
((unsigned char*)RetAddr)[0] = (2 | (4 << 3) | (3 << 6));
#else
((unsigned char*)RetAddr)[-1] = 0xE9;
@ -351,7 +361,7 @@ extern "C" void X86CompilationCallback2(intptr_t *StackPtr, intptr_t RetAddr) {
}
// Change the return address to reexecute the call instruction...
#ifdef __x86_64__
#if defined (X86_64_JIT)
*RetAddrLoc -= 0xd;
#else
*RetAddrLoc -= 5;
@ -362,8 +372,7 @@ TargetJITInfo::LazyResolverFn
X86JITInfo::getLazyResolverFunction(JITCompilerFn F) {
JITCompilerFunction = F;
#if (defined(__i386__) || defined(i386) || defined(_M_IX86)) && \
!defined(_MSC_VER) && !defined(__x86_64__)
#if defined (X86_32_JIT) && !defined (_MSC_VER)
unsigned EAX = 0, EBX = 0, ECX = 0, EDX = 0;
union {
unsigned u[3];
@ -384,7 +393,7 @@ X86JITInfo::getLazyResolverFunction(JITCompilerFn F) {
}
void *X86JITInfo::emitGlobalValueLazyPtr(void *GV, MachineCodeEmitter &MCE) {
#ifdef __x86_64__
#if defined (X86_64_JIT)
MCE.startFunctionStub(8, 8);
MCE.emitWordLE(((unsigned *)&GV)[0]);
MCE.emitWordLE(((unsigned *)&GV)[1]);
@ -398,15 +407,14 @@ void *X86JITInfo::emitGlobalValueLazyPtr(void *GV, MachineCodeEmitter &MCE) {
void *X86JITInfo::emitFunctionStub(void *Fn, MachineCodeEmitter &MCE) {
// 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(__i386__) || defined(i386) || defined(_M_IX86)) && \
!defined(_MSC_VER) && !defined(__x86_64__)
#if defined (X86_32_JIT) && !defined (_MSC_VER)
bool NotCC = (Fn != (void*)(intptr_t)X86CompilationCallback &&
Fn != (void*)(intptr_t)X86CompilationCallback_SSE);
#else
bool NotCC = Fn != (void*)(intptr_t)X86CompilationCallback;
#endif
if (NotCC) {
#ifdef __x86_64__
#if defined (X86_64_JIT)
MCE.startFunctionStub(13, 4);
MCE.emitByte(0x49); // REX prefix
MCE.emitByte(0xB8+2); // movabsq r10
@ -423,7 +431,7 @@ void *X86JITInfo::emitFunctionStub(void *Fn, MachineCodeEmitter &MCE) {
return MCE.finishFunctionStub(0);
}
#ifdef __x86_64__
#if defined (X86_64_JIT)
MCE.startFunctionStub(14, 4);
MCE.emitByte(0x49); // REX prefix
MCE.emitByte(0xB8+2); // movabsq r10