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* [glibc/arm/morello/main] aarch64: fix extension header write in getcontext and swapcontext
@ 2022-10-26 15:10 Szabolcs Nagy
  0 siblings, 0 replies; 2+ messages in thread
From: Szabolcs Nagy @ 2022-10-26 15:10 UTC (permalink / raw)
  To: glibc-cvs

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=e9ec6c08e294e607fcc782f194c47c60cde06d91

commit e9ec6c08e294e607fcc782f194c47c60cde06d91
Author: Szabolcs Nagy <szabolcs.nagy@arm.com>
Date:   Fri Jul 29 08:00:06 2022 +0100

    aarch64: fix extension header write in getcontext and swapcontext
    
    The extension header is two 32bit words and in the last header both
    should be 0. There is plenty space in the __reserved area, but it's
    better not to write more than we mean to.

Diff:
---
 sysdeps/unix/sysv/linux/aarch64/getcontext.S  | 4 ++--
 sysdeps/unix/sysv/linux/aarch64/swapcontext.S | 4 ++--
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/sysdeps/unix/sysv/linux/aarch64/getcontext.S b/sysdeps/unix/sysv/linux/aarch64/getcontext.S
index 15fbd2d1a0..3109cbd99a 100644
--- a/sysdeps/unix/sysv/linux/aarch64/getcontext.S
+++ b/sysdeps/unix/sysv/linux/aarch64/getcontext.S
@@ -86,8 +86,8 @@ ENTRY(__getcontext)
 	/* Write the termination context extension header.  */
 	add	x2, x2, #FPSIMD_CONTEXT_SIZE
 
-	str	xzr, [x2, #oHEAD + oMAGIC]
-	str	xzr, [x2, #oHEAD + oSIZE]
+	str	wzr, [x2, #oHEAD + oMAGIC]
+	str	wzr, [x2, #oHEAD + oSIZE]
 
 	/* Grab the signal mask */
 	/* rt_sigprocmask (SIG_BLOCK, NULL, &ucp->uc_sigmask, _NSIG8) */
diff --git a/sysdeps/unix/sysv/linux/aarch64/swapcontext.S b/sysdeps/unix/sysv/linux/aarch64/swapcontext.S
index 1ee2e40272..e3ec9da35d 100644
--- a/sysdeps/unix/sysv/linux/aarch64/swapcontext.S
+++ b/sysdeps/unix/sysv/linux/aarch64/swapcontext.S
@@ -75,8 +75,8 @@ ENTRY(__swapcontext)
 	/* Write the termination context extension header.  */
 	add	x2, x2, #FPSIMD_CONTEXT_SIZE
 
-	str	xzr, [x2, #oHEAD + oMAGIC]
-	str	xzr, [x2, #oHEAD + oSIZE]
+	str	wzr, [x2, #oHEAD + oMAGIC]
+	str	wzr, [x2, #oHEAD + oSIZE]
 
 	/* Preserve ucp.  */
 	mov	x21, x1

^ permalink raw reply	[flat|nested] 2+ messages in thread
* [glibc/arm/morello/main] aarch64: fix extension header write in getcontext and swapcontext
@ 2022-08-05 19:29 Szabolcs Nagy
  0 siblings, 0 replies; 2+ messages in thread
From: Szabolcs Nagy @ 2022-08-05 19:29 UTC (permalink / raw)
  To: glibc-cvs

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=2f90599f895576e5b0d7d91155182dd77300a8c3

commit 2f90599f895576e5b0d7d91155182dd77300a8c3
Author: Szabolcs Nagy <szabolcs.nagy@arm.com>
Date:   Fri Jul 29 08:00:06 2022 +0100

    aarch64: fix extension header write in getcontext and swapcontext
    
    The extension header is two 32bit words and in the last header both
    should be 0. There is plenty space in the __reserved area, but it's
    better not to write more than we mean to.

Diff:
---
 sysdeps/unix/sysv/linux/aarch64/getcontext.S  | 4 ++--
 sysdeps/unix/sysv/linux/aarch64/swapcontext.S | 4 ++--
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/sysdeps/unix/sysv/linux/aarch64/getcontext.S b/sysdeps/unix/sysv/linux/aarch64/getcontext.S
index 15fbd2d1a0..3109cbd99a 100644
--- a/sysdeps/unix/sysv/linux/aarch64/getcontext.S
+++ b/sysdeps/unix/sysv/linux/aarch64/getcontext.S
@@ -86,8 +86,8 @@ ENTRY(__getcontext)
 	/* Write the termination context extension header.  */
 	add	x2, x2, #FPSIMD_CONTEXT_SIZE
 
-	str	xzr, [x2, #oHEAD + oMAGIC]
-	str	xzr, [x2, #oHEAD + oSIZE]
+	str	wzr, [x2, #oHEAD + oMAGIC]
+	str	wzr, [x2, #oHEAD + oSIZE]
 
 	/* Grab the signal mask */
 	/* rt_sigprocmask (SIG_BLOCK, NULL, &ucp->uc_sigmask, _NSIG8) */
diff --git a/sysdeps/unix/sysv/linux/aarch64/swapcontext.S b/sysdeps/unix/sysv/linux/aarch64/swapcontext.S
index 1ee2e40272..e3ec9da35d 100644
--- a/sysdeps/unix/sysv/linux/aarch64/swapcontext.S
+++ b/sysdeps/unix/sysv/linux/aarch64/swapcontext.S
@@ -75,8 +75,8 @@ ENTRY(__swapcontext)
 	/* Write the termination context extension header.  */
 	add	x2, x2, #FPSIMD_CONTEXT_SIZE
 
-	str	xzr, [x2, #oHEAD + oMAGIC]
-	str	xzr, [x2, #oHEAD + oSIZE]
+	str	wzr, [x2, #oHEAD + oMAGIC]
+	str	wzr, [x2, #oHEAD + oSIZE]
 
 	/* Preserve ucp.  */
 	mov	x21, x1


^ permalink raw reply	[flat|nested] 2+ messages in thread

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