From: H.J. Lu <hongjiu.lu@intel.com>
Date: Mon, 23 Apr 2018 12:29:00 +0000 (+0000)
Subject: x86/cet: Use unsigned integer to unwind shadow stack
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=0ef9f21d3c4de3a6af258338523d35ea6c4d492f;p=gcc.git

x86/cet: Use unsigned integer to unwind shadow stack

Use unsigned integer to unwind shadow stack by replacing jle with jbe and
jg with ja.

	PR target/85489
	* config/x86/sjlj.S (GTM_longjmp): Replace jle/jg with jbe/ja.

From-SVN: r259559
---

diff --git a/libitm/ChangeLog b/libitm/ChangeLog
index 53fe89749a9..7f6a24f1a60 100644
--- a/libitm/ChangeLog
+++ b/libitm/ChangeLog
@@ -1,3 +1,8 @@
+2018-04-23  H.J. Lu  <hongjiu.lu@intel.com>
+
+	PR target/85489
+	* config/x86/sjlj.S (GTM_longjmp): Replace jle/jg with jbe/ja.
+
 2018-04-19  Jakub Jelinek  <jakub@redhat.com>
 
 	* configure: Regenerated.
diff --git a/libitm/config/x86/sjlj.S b/libitm/config/x86/sjlj.S
index ee61451394a..2345b2f4ec4 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