x86/x86_64: getcontext: no need to restore %ecx or %rcx

2018-02-14 05:12:09 +00:00 · 2018-02-14 05:12:09 +00:00 · 556da6ce99
parent 0143bbac98
commit 556da6ce99
2 changed files with 0 additions and 6 deletions
--- a/arch/x86/getcontext.S
+++ b/arch/x86/getcontext.S
@ -42,9 +42,6 @@ __getcontext:
 	movw	%fs, %cx
 	movl	%ecx, OFFSET_REG_FS(%eax)

-	/* we need to restore %ecx because we clobbered it earlier */	
-	movl	OFFSET_REG_ECX(%eax), %ecx
-
 	/* we're all done here, return 0 */
 	xorl	%eax, %eax
 	ret
--- a/arch/x86_64/getcontext.S
+++ b/arch/x86_64/getcontext.S
@ -39,9 +39,6 @@ __getcontext:
 	leaq	8(%rsp), %rcx
 	movq	%rcx, 160(%rdi)

-	/* we need to restore %rcx because we clobbered it earlier */	
-	movq	152(%rdi), %rcx
-
 	/* we're all done here, return 0 */
 	xorl	%eax, %eax
 	ret