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authorTom Tromey <tromey@redhat.com>2014-01-20 12:58:03 +0000
committerMarcus Shawcroft <marcus.shawcroft@linaro.org>2014-01-20 15:44:05 +0000
commit3a3acb6afc753475675b5724f206e619d0c9590d (patch)
tree17c565f3ad7d09d9890e42495ab3fc9cf20229b9 /ports/sysdeps/unix/sysv
parentb67e7fe0f9f9b0f6c4386a0eccba83178098438c (diff)
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[AArch64] BZ #16169 Add CFI directives to clone.S
[BZ #16169] Add CFI directives to the AArch64 clone.S implementation
and ensure that the FP in the child is zero'd in order to comply with
AAPCS.
Diffstat (limited to 'ports/sysdeps/unix/sysv')
-rw-r--r--ports/sysdeps/unix/sysv/linux/aarch64/clone.S7
1 files changed, 6 insertions, 1 deletions
diff --git a/ports/sysdeps/unix/sysv/linux/aarch64/clone.S b/ports/sysdeps/unix/sysv/linux/aarch64/clone.S
index 2ca8021064..f2964f4871 100644
--- a/ports/sysdeps/unix/sysv/linux/aarch64/clone.S
+++ b/ports/sysdeps/unix/sysv/linux/aarch64/clone.S
@@ -63,6 +63,7 @@ ENTRY(__clone)
 	mov	x8, #SYS_ify(clone)
 	/* X0:flags, x1:newsp, x2:parenttidptr, x3:newtls, x4:childtid.  */
 	svc	0x0
+	cfi_endproc
 	cmp	x0, #0
 	beq	2f
 	blt	3f
@@ -72,6 +73,9 @@ ENTRY(__clone)
 	b	syscall_error
 
 2:
+	cfi_startproc
+	cfi_undefined (x30)
+	mov	x29, 0
 #ifdef RESET_PID
 	tbnz	x5, #CLONE_THREAD_BIT, 3f
 	mov	x0, #-1
@@ -93,7 +97,8 @@ ENTRY(__clone)
 
 	/* We are done, pass the return value through x0.  */
 	b	HIDDEN_JUMPTARGET(_exit)
-
+	cfi_endproc
+	cfi_startproc
 PSEUDO_END (__clone)
 
 weak_alias (__clone, clone)