//
// The LLVM Compiler Infrastructure
//
-// This file was developed by the LLVM research group and is distributed under
-// the University of Illinois Open Source License. See LICENSE.TXT for details.
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
#include "llvm/CodeGen/MachineCodeEmitter.h"
#include "llvm/Config/alloca.h"
#include <cstdlib>
+#include <cstring>
using namespace llvm;
#ifdef _MSC_VER
#define GETASMPREFIX(X) GETASMPREFIX2(X)
#define ASMPREFIX GETASMPREFIX(__USER_LABEL_PREFIX__)
+// 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)
+#if defined(__APPLE__)
+# define CFI(x)
+#else
+// FIXME: Disable this until we really want to use it. Also, we will
+// need to add some workarounds for compilers, which support
+// only subset of these directives.
+# define CFI(x)
+#endif
+
// Provide a wrapper for X86CompilationCallback2 that saves non-traditional
// callee saved registers, for the fastcc calling convention.
extern "C" {
".align 8\n"
".globl " ASMPREFIX "X86CompilationCallback\n"
ASMPREFIX "X86CompilationCallback:\n"
+ CFI(".cfi_startproc\n")
// Save RBP
"pushq %rbp\n"
+ CFI(".cfi_def_cfa_offset 16\n")
+ CFI(".cfi_offset %rbp, -16\n")
// Save RSP
"movq %rsp, %rbp\n"
+ CFI(".cfi_def_cfa_register %rbp\n")
// Save all int arg registers
"pushq %rdi\n"
+ CFI(".cfi_rel_offset %rdi, 0\n")
"pushq %rsi\n"
+ CFI(".cfi_rel_offset %rsi, 8\n")
"pushq %rdx\n"
+ CFI(".cfi_rel_offset %rdx, 16\n")
"pushq %rcx\n"
+ CFI(".cfi_rel_offset %rcx, 24\n")
"pushq %r8\n"
+ CFI(".cfi_rel_offset %r8, 32\n")
"pushq %r9\n"
+ CFI(".cfi_rel_offset %r9, 40\n")
// Align stack on 16-byte boundary. ESP might not be properly aligned
// (8 byte) if this is called from an indirect stub.
"andq $-16, %rsp\n"
"movaps (%rsp), %xmm0\n"
// Restore RSP
"movq %rbp, %rsp\n"
+ CFI(".cfi_def_cfa_register %rsp\n")
// Restore all int arg registers
"subq $48, %rsp\n"
+ CFI(".cfi_adjust_cfa_offset 48\n")
"popq %r9\n"
+ CFI(".cfi_adjust_cfa_offset -8\n")
+ CFI(".cfi_restore %r9\n")
"popq %r8\n"
+ CFI(".cfi_adjust_cfa_offset -8\n")
+ CFI(".cfi_restore %r8\n")
"popq %rcx\n"
+ CFI(".cfi_adjust_cfa_offset -8\n")
+ CFI(".cfi_restore %rcx\n")
"popq %rdx\n"
+ CFI(".cfi_adjust_cfa_offset -8\n")
+ CFI(".cfi_restore %rdx\n")
"popq %rsi\n"
+ CFI(".cfi_adjust_cfa_offset -8\n")
+ CFI(".cfi_restore %rsi\n")
"popq %rdi\n"
+ CFI(".cfi_adjust_cfa_offset -8\n")
+ CFI(".cfi_restore %rdi\n")
// Restore RBP
"popq %rbp\n"
- "ret\n");
+ CFI(".cfi_adjust_cfa_offset -8\n")
+ CFI(".cfi_restore %rbp\n")
+ "ret\n"
+ CFI(".cfi_endproc\n")
+ );
#elif defined(__i386__) || defined(i386) || defined(_M_IX86)
#ifndef _MSC_VER
void X86CompilationCallback(void);
".align 8\n"
".globl " ASMPREFIX "X86CompilationCallback\n"
ASMPREFIX "X86CompilationCallback:\n"
- ".cfi_startproc\n"
+ CFI(".cfi_startproc\n")
"pushl %ebp\n"
- ".cfi_def_cfa_offset 8\n"
- ".cfi_offset ebp, -8\n"
+ CFI(".cfi_def_cfa_offset 8\n")
+ CFI(".cfi_offset %ebp, -8\n")
"movl %esp, %ebp\n" // Standard prologue
- ".cfi_def_cfa_register ebp\n"
+ CFI(".cfi_def_cfa_register %ebp\n")
"pushl %eax\n"
- ".cfi_rel_offset eax, 0\n"
+ CFI(".cfi_rel_offset %eax, 0\n")
"pushl %edx\n" // Save EAX/EDX/ECX
- ".cfi_rel_offset edx, 4\n"
+ CFI(".cfi_rel_offset %edx, 4\n")
"pushl %ecx\n"
- ".cfi_rel_offset ecx, 8\n"
+ CFI(".cfi_rel_offset %ecx, 8\n")
#if defined(__APPLE__)
"andl $-16, %esp\n" // Align ESP on 16-byte boundary
#endif
"movl %ebp, (%esp)\n"
"call " ASMPREFIX "X86CompilationCallback2\n"
"movl %ebp, %esp\n" // Restore ESP
- ".cfi_def_cfa_register esp\n"
+ CFI(".cfi_def_cfa_register %esp\n")
"subl $12, %esp\n"
- ".cfi_adjust_cfa_offset 12\n"
+ CFI(".cfi_adjust_cfa_offset 12\n")
"popl %ecx\n"
- ".cfi_adjust_cfa_offset -4\n"
- ".cfi_restore ecx\n"
+ CFI(".cfi_adjust_cfa_offset -4\n")
+ CFI(".cfi_restore %ecx\n")
"popl %edx\n"
- ".cfi_adjust_cfa_offset -4\n"
- ".cfi_restore edx\n"
+ CFI(".cfi_adjust_cfa_offset -4\n")
+ CFI(".cfi_restore %edx\n")
"popl %eax\n"
- ".cfi_adjust_cfa_offset -4\n"
- ".cfi_restore eax\n"
+ CFI(".cfi_adjust_cfa_offset -4\n")
+ CFI(".cfi_restore %eax\n")
"popl %ebp\n"
- ".cfi_adjust_cfa_offset -4\n"
- ".cfi_restore ebp\n"
+ CFI(".cfi_adjust_cfa_offset -4\n")
+ CFI(".cfi_restore %ebp\n")
"ret\n"
- ".cfi_endproc\n");
+ CFI(".cfi_endproc\n")
+ );
// Same as X86CompilationCallback but also saves XMM argument registers.
void X86CompilationCallback_SSE(void);
".align 8\n"
".globl " ASMPREFIX "X86CompilationCallback_SSE\n"
ASMPREFIX "X86CompilationCallback_SSE:\n"
- ".cfi_startproc\n"
+ CFI(".cfi_startproc\n")
"pushl %ebp\n"
- ".cfi_def_cfa_offset 8\n"
- ".cfi_offset ebp, -8\n"
+ CFI(".cfi_def_cfa_offset 8\n")
+ CFI(".cfi_offset %ebp, -8\n")
"movl %esp, %ebp\n" // Standard prologue
- ".cfi_def_cfa_register ebp\n"
+ CFI(".cfi_def_cfa_register %ebp\n")
"pushl %eax\n"
- ".cfi_rel_offset eax, 0\n"
+ CFI(".cfi_rel_offset %eax, 0\n")
"pushl %edx\n" // Save EAX/EDX/ECX
- ".cfi_rel_offset edx, 4\n"
+ CFI(".cfi_rel_offset %edx, 4\n")
"pushl %ecx\n"
- ".cfi_rel_offset ecx, 8\n"
+ CFI(".cfi_rel_offset %ecx, 8\n")
"andl $-16, %esp\n" // Align ESP on 16-byte boundary
// Save all XMM arg registers
"subl $64, %esp\n"
"call " ASMPREFIX "X86CompilationCallback2\n"
"addl $16, %esp\n"
"movaps 48(%esp), %xmm3\n"
- ".cfi_restore xmm3\n"
+ CFI(".cfi_restore %xmm3\n")
"movaps 32(%esp), %xmm2\n"
- ".cfi_restore xmm2\n"
+ CFI(".cfi_restore %xmm2\n")
"movaps 16(%esp), %xmm1\n"
- ".cfi_restore xmm1\n"
+ CFI(".cfi_restore %xmm1\n")
"movaps (%esp), %xmm0\n"
- ".cfi_restore xmm0\n"
+ CFI(".cfi_restore %xmm0\n")
"movl %ebp, %esp\n" // Restore ESP
- ".cfi_def_cfa_register esp\n"
+ CFI(".cfi_def_cfa_register esp\n")
"subl $12, %esp\n"
- ".cfi_adjust_cfa_offset 12\n"
+ CFI(".cfi_adjust_cfa_offset 12\n")
"popl %ecx\n"
- ".cfi_adjust_cfa_offset -4\n"
- ".cfi_restore ecx\n"
+ CFI(".cfi_adjust_cfa_offset -4\n")
+ CFI(".cfi_restore %ecx\n")
"popl %edx\n"
- ".cfi_adjust_cfa_offset -4\n"
- ".cfi_restore edx\n"
+ CFI(".cfi_adjust_cfa_offset -4\n")
+ CFI(".cfi_restore %edx\n")
"popl %eax\n"
- ".cfi_adjust_cfa_offset -4\n"
- ".cfi_restore eax\n"
+ CFI(".cfi_adjust_cfa_offset -4\n")
+ CFI(".cfi_restore %eax\n")
"popl %ebp\n"
- ".cfi_adjust_cfa_offset -4\n"
- ".cfi_restore ebp\n"
+ CFI(".cfi_adjust_cfa_offset -4\n")
+ CFI(".cfi_restore %ebp\n")
"ret\n"
- ".cfi_endproc\n");
+ CFI(".cfi_endproc\n")
+ );
#else
void X86CompilationCallback2(void);
return X86CompilationCallback;
}
+void *X86JITInfo::emitGlobalValueLazyPtr(void *GV, MachineCodeEmitter &MCE) {
+#ifdef __x86_64__
+ MCE.startFunctionStub(8, 8);
+ MCE.emitWordLE(((unsigned *)&GV)[0]);
+ MCE.emitWordLE(((unsigned *)&GV)[1]);
+#else
+ MCE.startFunctionStub(4, 4);
+ MCE.emitWordLE((intptr_t)GV);
+#endif
+ return MCE.finishFunctionStub(0);
+}
+
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.
return MCE.finishFunctionStub(0);
}
+/// getPICJumpTableEntry - Returns the value of the jumptable entry for the
+/// specific basic block.
+intptr_t X86JITInfo::getPICJumpTableEntry(intptr_t BB, intptr_t Entry) {
+ return BB - PICBase;
+}
+
/// relocate - Before the JIT can run a block of code that has been emitted,
/// it must rewrite the code to contain the actual addresses of any
/// referenced global symbols.
case X86::reloc_pcrel_word: {
// PC relative relocation, add the relocated value to the value already in
// memory, after we adjust it for where the PC is.
- ResultPtr = ResultPtr-(intptr_t)RelocPos-4-MR->getConstantVal();
+ ResultPtr = ResultPtr -(intptr_t)RelocPos - 4 - MR->getConstantVal();
+ *((unsigned*)RelocPos) += (unsigned)ResultPtr;
+ break;
+ }
+ case X86::reloc_picrel_word: {
+ // PIC base relative relocation, add the relocated value to the value
+ // already in memory, after we adjust it for where the PIC base is.
+ ResultPtr = ResultPtr - ((intptr_t)Function + MR->getConstantVal());
*((unsigned*)RelocPos) += (unsigned)ResultPtr;
break;
}
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