From 9c925ff964bf221207dd6727d468ee964e2725fd Mon Sep 17 00:00:00 2001
From: Roland McGrath <roland@hack.frob.com>
Date: Thu, 3 Jul 2014 22:09:33 -0700
Subject: IA64: Consolidate NPTL/non versions of vfork

---
 sysdeps/unix/sysv/linux/ia64/vfork.S | 35 +++++++++++++++++++++++++++++++----
 1 file changed, 31 insertions(+), 4 deletions(-)

(limited to 'sysdeps/unix/sysv/linux/ia64/vfork.S')

diff --git a/sysdeps/unix/sysv/linux/ia64/vfork.S b/sysdeps/unix/sysv/linux/ia64/vfork.S
index 0422104b45..ff2d22b902 100644
--- a/sysdeps/unix/sysv/linux/ia64/vfork.S
+++ b/sysdeps/unix/sysv/linux/ia64/vfork.S
@@ -19,6 +19,7 @@
 #include <sysdep.h>
 #define _SIGNAL_H
 #include <bits/signum.h>
+#include <tcb-offsets.h>
 
 /* The following are defined in linux/sched.h, which unfortunately	*/
 /* is not safe for inclusion in an assembly file.			*/
@@ -28,16 +29,42 @@
 /* pid_t vfork(void); */
 /* Implemented as __clone_syscall(CLONE_VFORK | CLONE_VM | SIGCHLD, 0)	*/
 
-ENTRY(__vfork)
+ENTRY (__libc_vfork)
+	.prologue	// work around a GAS bug which triggers if
+	.body		// first .prologue is not at the beginning of proc.
 	alloc r2=ar.pfs,0,0,2,0
+	adds r14=PID,r13
+	;;
+	ld4 r16=[r14]
+	;;
+	sub r15=0,r16
+	cmp.eq p6,p0=0,r16
+	;;
+(p6)	movl r15=0x80000000
 	mov out0=CLONE_VM+CLONE_VFORK+SIGCHLD
 	mov out1=0		/* Standard sp value.			*/
 	;;
-	DO_CALL_VIA_BREAK (SYS_ify (clone))
+	st4 [r14]=r15
+	DO_CALL (SYS_ify (clone))
+	cmp.eq p6,p0=0,r8
+	adds r14=PID,r13
+(p6)	br.cond.dptk 1f
+	;;
+	ld4 r15=[r14]
+	;;
+	extr.u r16=r15,0,31
+	;;
+	cmp.eq p0,p6=0,r16
+	;;
+(p6)	sub r16=0,r15
+	;;
+	st4 [r14]=r16
+1:
 	cmp.eq p6,p0=-1,r10
 (p6)	br.cond.spnt.few __syscall_error
 	ret
-PSEUDO_END(__vfork)
-libc_hidden_def (__vfork)
+PSEUDO_END (__libc_vfork)
 
+strong_alias (__libc_vfork, __vfork)
+libc_hidden_def (__vfork)
 weak_alias (__vfork, vfork)
-- 
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