x86/cet: Use unsigned integer to unwind shadow stack

Message ID 20180423121050.GA63877@intel.com
State New
Headers show
Series
  • x86/cet: Use unsigned integer to unwind shadow stack
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Commit Message

H.J. Lu April 23, 2018, 12:10 p.m.
Use unsigned integer to unwind shadow stack by replacing jle with jbe and
jg with ja.

OK for trunk?

H.J.
---
	PR target/85489
	* config/x86/sjlj.S (GTM_longjmp): Replace jle/jg with jbe/ja.
---
 libitm/config/x86/sjlj.S | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

-- 
2.14.3

Patch

diff --git a/libitm/config/x86/sjlj.S b/libitm/config/x86/sjlj.S
index 3cac9099c9e..e5cdbab48a7 100644
--- a/libitm/config/x86/sjlj.S
+++ b/libitm/config/x86/sjlj.S
@@ -235,7 +235,7 @@  SYM(GTM_longjmp):
 	/* If # of frames is greater 255 then loop
 	   and adjust.  */
 	cmpq	$255, %rcx
-	jle	.L3
+	jbe	.L3
 	movl	$255, %edi
 	.p2align 4,,10
 	.p2align 3
@@ -243,7 +243,7 @@  SYM(GTM_longjmp):
 	incsspq	%rdi
 	subq	$255, %rcx
 	cmpq	$255, %rcx
-	jg	.L4
+	ja	.L4
 .L3:
 	incsspq	%rcx
 .L1:
@@ -273,7 +273,7 @@  SYM(GTM_longjmp):
 	/* If # of frames is greater 255 then loop
 	   and adjust.  */
 	cmpl	$255, %ecx
-	jle	.L3
+	jbe	.L3
 	pushl	%eax
 	movl	$255, %eax
 	.p2align 4,,10
@@ -282,7 +282,7 @@  SYM(GTM_longjmp):
 	incsspd	%eax
 	subl	$255, %ecx
 	cmpl	$255, %ecx
-	jg	.L4
+	ja	.L4
 	popl	%eax
 .L3:
 	incsspd	%ecx