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Add Mac OS X compatible JIT callback routine.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55625 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng 2008-09-02 07:49:03 +00:00
parent 7602e11c32
commit 95ce1178e4
1 changed files with 29 additions and 5 deletions
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34
lib/Target/ARM/ARMJITInfo.cpp
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@ -29,6 +29,14 @@ void ARMJITInfo::replaceMachineCodeForFunction(void *Old, void *New) {
/// compile a function lazily. /// compile a function lazily.
static TargetJITInfo::JITCompilerFn JITCompilerFunction; static TargetJITInfo::JITCompilerFn JITCompilerFunction;
// Get the ASMPREFIX for the current host. This is often '_'.
#ifndef __USER_LABEL_PREFIX__
#define __USER_LABEL_PREFIX__
#endif
#define GETASMPREFIX2(X) #X
#define GETASMPREFIX(X) GETASMPREFIX2(X)
#define ASMPREFIX GETASMPREFIX(__USER_LABEL_PREFIX__)
// CompilationCallback stub - We can't use a C function with inline assembly in // 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. Instead, // it, because we the prolog/epilog inserted by GCC won't work for us. Instead,
// write our own wrapper, which does things our way, so we have complete control // write our own wrapper, which does things our way, so we have complete control
@ -39,21 +47,37 @@ extern "C" {
asm( asm(
".text\n" ".text\n"
".align 2\n" ".align 2\n"
".globl ARMCompilationCallback\n" ".globl " ASMPREFIX "ARMCompilationCallback\n"
"ARMCompilationCallback:\n" ASMPREFIX "ARMCompilationCallback:\n"
// save main registers // save main registers
#if defined(__APPLE__)
"stmfd sp!, {r4, r5, r6, r7, lr}\n"
"mov r0, r7\n" // stub's frame
"stmfd sp!, {r8, r10, r11}\n"
#else
"mov ip, sp\n" "mov ip, sp\n"
"stmfd sp!, {fp, ip, lr, pc}\n" "stmfd sp!, {fp, ip, lr, pc}\n"
"sub fp, ip, #4\n" "sub fp, ip, #4\n"
#endif // __APPLE__
// arguments to Compilation Callback // arguments to Compilation Callback
// r0 - our lr (address of the call instruction in stub plus 4) // r0 - our lr (address of the call instruction in stub plus 4)
// r1 - stub's lr (address of instruction that called the stub plus 4) // r1 - stub's lr (address of instruction that called the stub plus 4)
#if defined(__APPLE__)
"mov r0, r7\n" // stub's frame
#else
"mov r0, fp\n" // stub's frame "mov r0, fp\n" // stub's frame
#endif // __APPLE__
"mov r1, lr\n" // stub's lr "mov r1, lr\n" // stub's lr
"bl ARMCompilationCallbackC\n" "bl " ASMPREFIX "ARMCompilationCallbackC\n"
// restore main registers // restore main registers
"ldmfd sp, {fp, sp, pc}\n"); #if defined(__APPLE__)
#else // Not an ARM host "ldmfd sp!, {r8, r10, r11}\n"
"ldmfd sp!, {r4, r5, r6, r7, pc}\n"
#else
"ldmfd sp, {fp, sp, pc}\n"
#endif // __APPLE__
);
#else // Not an ARM host
void ARMCompilationCallback() { void ARMCompilationCallback() {
assert(0 && "Cannot call ARMCompilationCallback() on a non-ARM arch!\n"); assert(0 && "Cannot call ARMCompilationCallback() on a non-ARM arch!\n");
abort(); abort();