[PATCH] aarch64: fix cfi directives around __libc_arm_za_disable

[Yury Khrustalev]

Incorrect CFI directive corrupted call stack information
and prevented debuggers from correctly displaying call
stack information.

---

Passes regression on AArch64. OK for trunk?
Base commit: 013f5167b9

---
 sysdeps/unix/sysv/linux/aarch64/sysdep.h | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/sysdeps/unix/sysv/linux/aarch64/sysdep.h b/sysdeps/unix/sysv/linux/aarch64/sysdep.h
index 30003c0145..8a7690d4a8 100644
--- a/sysdeps/unix/sysv/linux/aarch64/sysdep.h
+++ b/sysdeps/unix/sysv/linux/aarch64/sysdep.h
@@ -155,11 +155,12 @@
    that allows to call it without stack manipulation and preserving
    most of the registers.  */
 	.macro CALL_LIBC_ARM_ZA_DISABLE
+	cfi_remember_state
 	mov		x13, x30
-	.cfi_register	x30, x13
+	cfi_register(x30, x13)
 	bl		__libc_arm_za_disable
 	mov		x30, x13
-	.cfi_register	x13, x30
+	cfi_restore_state
 	.endm
 
 #else /* not __ASSEMBLER__ */
@@ -250,11 +251,12 @@
 ({							\
   unsigned long int __tmp;				\
   asm volatile (					\
+  "	.cfi_remember_state\n"			\
   "	mov		%0, x30\n"			\
-  "	.cfi_register	x30, %0\n"			\
+  "	.cfi_register x30, %0\n"      \
   "	bl		__libc_arm_za_disable\n"	\
   "	mov		x30, %0\n"			\
-  "	.cfi_register	%0, x30\n"			\
+  "	.cfi_restore_state\n"			\
   : "=r" (__tmp)					\
   :							\
   : "x14", "x15", "x16", "x17", "x18", "memory" );	\
-- 
2.47.3