Commit 4bcdf152 authored by Steven Rostedt (Red Hat)'s avatar Steven Rostedt (Red Hat) Committed by Steven Rostedt
Browse files

ftrace/x86: Move MCOUNT_SAVE_FRAME out of header file 

Linus pointed out that MCOUNT_SAVE_FRAME is used in only a single file
and that there's no reason that it should be in a header file.
Move the macro to the code that uses it.

Link: http://lkml.kernel.org/r/CA+55aFwF+qCGSKdGaEgW4p6N65GZ5_XTV=1NbtWDvxnd5yYLiw@mail.gmail.com
Link: http://lkml.kernel.org/r/alpine.DEB.2.11.1411262304010.3961@nanos



Reviewed-by: default avatarThomas Gleixner <tglx@linutronix.de>
Signed-off-by: default avatarSteven Rostedt <rostedt@goodmis.org>
parent 76c2f13c

arch/x86/include/asm/ftrace.h

+0 −33
Original line number Diff line number Diff line 
#ifndef _ASM_X86_FTRACE_H

#define _ASM_X86_FTRACE_H



#ifdef __ASSEMBLY__



	/* skip is set if the stack was already partially adjusted */

	.macro MCOUNT_SAVE_FRAME skip=0

	 /*

	  * We add enough stack to save all regs.

	  */

	subq $(SS+8-\skip), %rsp

	movq %rax, RAX(%rsp)

	movq %rcx, RCX(%rsp)

	movq %rdx, RDX(%rsp)

	movq %rsi, RSI(%rsp)

	movq %rdi, RDI(%rsp)

	movq %r8, R8(%rsp)

	movq %r9, R9(%rsp)

	 /* Move RIP to its proper location */

	movq SS+8(%rsp), %rdx

	movq %rdx, RIP(%rsp)

	.endm



	.macro MCOUNT_RESTORE_FRAME skip=0

	movq R9(%rsp), %r9

	movq R8(%rsp), %r8

	movq RDI(%rsp), %rdi

	movq RSI(%rsp), %rsi

	movq RDX(%rsp), %rdx

	movq RCX(%rsp), %rcx

	movq RAX(%rsp), %rax

	addq $(SS+8-\skip), %rsp

	.endm



#endif



#ifdef CONFIG_FUNCTION_TRACER

#ifdef CC_USING_FENTRY

# define MCOUNT_ADDR		((long)(__fentry__))

arch/x86/kernel/mcount_64.S

+29 −0
Original line number Diff line number Diff line
@@ -21,6 +21,35 @@ 
# define function_hook	mcount

#endif



/* skip is set if the stack was already partially adjusted */

.macro MCOUNT_SAVE_FRAME skip=0

	 /*

	  * We add enough stack to save all regs.

	  */

	subq $(SS+8-\skip), %rsp

	movq %rax, RAX(%rsp)

	movq %rcx, RCX(%rsp)

	movq %rdx, RDX(%rsp)

	movq %rsi, RSI(%rsp)

	movq %rdi, RDI(%rsp)

	movq %r8, R8(%rsp)

	movq %r9, R9(%rsp)

	 /* Move RIP to its proper location */

	movq SS+8(%rsp), %rdx

	movq %rdx, RIP(%rsp)

	.endm



.macro MCOUNT_RESTORE_FRAME skip=0

	movq R9(%rsp), %r9

	movq R8(%rsp), %r8

	movq RDI(%rsp), %rdi

	movq RSI(%rsp), %rsi

	movq RDX(%rsp), %rdx

	movq RCX(%rsp), %rcx

	movq RAX(%rsp), %rax

	addq $(SS+8-\skip), %rsp

	.endm



/* skip is set if stack has been adjusted */

.macro ftrace_caller_setup trace_label skip=0

	MCOUNT_SAVE_FRAME \skip

CRA Git | Maintained and supported by SUSTech CRA and CCSE