diff options
| author | Cyrill Gorcunov <gorcunov@gmail.com> | 2008-12-13 00:09:08 +0300 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-12-17 00:26:38 +0100 |
| commit | d680fe44775ed17a80035462d9898f5e77bfd7dd (patch) | |
| tree | dddee638e2a44d5008684c6a59b44edcae98ba8f /arch/x86/include | |
| parent | 66896a85cf2890b6bbbc4c9ccdcd296600ffbf89 (diff) | |
x86: entry_64 - introduce FTRACE_ frame macro v2
Impact: clean up
Itroduce MCOUNT_SAVE/RESTORE_FRAME which allow us to
save a number of lines on source level.
Also fix a comment in ftrace.h.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/include')
| -rw-r--r-- | arch/x86/include/asm/ftrace.h | 29 |
1 files changed, 28 insertions, 1 deletions
diff --git a/arch/x86/include/asm/ftrace.h b/arch/x86/include/asm/ftrace.h index 7e61b4ceb9a..b55b4a7fbef 100644 --- a/arch/x86/include/asm/ftrace.h +++ b/arch/x86/include/asm/ftrace.h @@ -1,6 +1,33 @@ #ifndef _ASM_X86_FTRACE_H #define _ASM_X86_FTRACE_H +#ifdef __ASSEMBLY__ + + .macro MCOUNT_SAVE_FRAME + /* taken from glibc */ + subq $0x38, %rsp + movq %rax, (%rsp) + movq %rcx, 8(%rsp) + movq %rdx, 16(%rsp) + movq %rsi, 24(%rsp) + movq %rdi, 32(%rsp) + movq %r8, 40(%rsp) + movq %r9, 48(%rsp) + .endm + + .macro MCOUNT_RESTORE_FRAME + movq 48(%rsp), %r9 + movq 40(%rsp), %r8 + movq 32(%rsp), %rdi + movq 24(%rsp), %rsi + movq 16(%rsp), %rdx + movq 8(%rsp), %rcx + movq (%rsp), %rax + addq $0x38, %rsp + .endm + +#endif + #ifdef CONFIG_FUNCTION_TRACER #define MCOUNT_ADDR ((long)(mcount)) #define MCOUNT_INSN_SIZE 5 /* sizeof mcount call */ @@ -46,7 +73,7 @@ struct ftrace_ret_stack { /* * Primary handler of a function return. * It relays on ftrace_return_to_handler. - * Defined in entry32.S + * Defined in entry_32/64.S */ extern void return_to_handler(void); |