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Use .size and .type on ELF systems; this helps tools that map

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addresses to symbols.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@63962 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dan Gohman 2009-02-06 21:15:52 +00:00
parent 3f4c81de0a
commit 9036d80d7b
1 changed files with 19 additions and 3 deletions
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22
lib/Target/X86/X86JITInfo.cpp
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@ -59,6 +59,16 @@ static TargetJITInfo::JITCompilerFn JITCompilerFunction;
#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)
@ -82,6 +92,7 @@ extern "C" {
".text\n"
".align 8\n"
".globl " ASMPREFIX "X86CompilationCallback\n"
TYPE_FUNCTION(X86CompilationCallback)
ASMPREFIX "X86CompilationCallback:\n"
CFI(".cfi_startproc\n")
// Save RBP
@ -160,6 +171,7 @@ extern "C" {
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
@ -173,7 +185,8 @@ extern "C" {
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"
@ -213,6 +226,7 @@ extern "C" {
CFI(".cfi_restore %ebp\n")
"ret\n"
CFI(".cfi_endproc\n")
SIZE(X86CompilationCallback)
);
// Same as X86CompilationCallback but also saves XMM argument registers.
@ -220,7 +234,8 @@ extern "C" {
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"
@ -276,6 +291,7 @@ extern "C" {
CFI(".cfi_restore %ebp\n")
"ret\n"
CFI(".cfi_endproc\n")
SIZE(X86CompilationCallback_SSE)
);
# else
void X86CompilationCallback2(intptr_t *StackPtr, intptr_t RetAddr);
@ -312,7 +328,7 @@ extern "C" {
#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.