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authorUlrich Drepper <drepper@redhat.com>2001-02-19 18:55:39 +0000
committerUlrich Drepper <drepper@redhat.com>2001-02-19 18:55:39 +0000
commit4c48dc9386ff50f960ae9d7d71493bfd85ccb979 (patch)
treebabe088b6a157319a72cb0145be4a7b09e32202f /sysdeps/unix/sysv/linux/ia64/clone2.S
parentb99a3ee2223e29059b00616365625cc9c55a362e (diff)
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Update.
2001-02-18  Mark Kettenis  <kettenis@gnu.org>

	* malloc/mtrace.c [USE_IN_LIBIO]: Define fopen as _IO_fopen64.
	(mtrace): Revert 2001-02-13 patch: use fopen instead of fopen64.

2001-02-17  H.J. Lu  <hjl@gnu.org>

	* sysdeps/unix/sysv/linux/ia64/clone2.S: Use clone2 and don't use
	scratch registers across the system call.
Diffstat (limited to 'sysdeps/unix/sysv/linux/ia64/clone2.S')
-rw-r--r--sysdeps/unix/sysv/linux/ia64/clone2.S45
1 files changed, 14 insertions, 31 deletions
diff --git a/sysdeps/unix/sysv/linux/ia64/clone2.S b/sysdeps/unix/sysv/linux/ia64/clone2.S
index 5c3e88a498..491f2cccb1 100644
--- a/sysdeps/unix/sysv/linux/ia64/clone2.S
+++ b/sysdeps/unix/sysv/linux/ia64/clone2.S
@@ -1,4 +1,4 @@
-/* Copyright (C) 2000 Free Software Foundation, Inc.
+/* Copyright (C) 2000, 2001 Free Software Foundation, Inc.
 
    The GNU C Library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Library General Public License as
@@ -24,7 +24,8 @@
 /* 	         size_t child_stack_size, int flags, void *arg) */
 
 ENTRY(__clone2)
-	cmp.eq p6,p0=0,r32
+	alloc r2=ar.pfs,5,2,3,0
+	cmp.eq p6,p0=0,in0
 	mov r8=EINVAL
 (p6)	br.cond.spnt.few __syscall_error
 	;;
@@ -34,28 +35,12 @@ ENTRY(__clone2)
 				/* instructions.  We need to ensure	*/
 				/* that it will not read or write the	*/
 				/* backing store.			*/
-	mov r17=ar.rsc		/* save ar.rsc	*/
-	mov r14=r32		/* save fn	*/
-	mov r18=r33		/* save child_stack_base		*/
-				/* Note that r15 is used to pass 	*/
-				/* syscall # to kernel & not preserved. */
-	mov r16=r36		/* save arg	*/
-	;;
-	dep r36=0,r17,0,2	/* set to enforced lazy mode.	*/
-	;;
-	mov ar.rsc=r36
-	cmp.ne p7,p0=0,r33	/* stack_base 0?	*/
-	;;
-(p7)	add r33=r33,r34		/* Stack base arg to syscall is 	*/
-				/* 0 if child_stack_base is 0,		*/
-				/* child_stack_base + child_stack_size	*/
-				/* otherwise.				*/
-				/* The system call interface seems 	*/
-				/* quite contrived at this point.  If	*/
-				/* we don't pass the backing store	*/
-				/* pointer, why do we pass the sp?	*/
-	mov r32=r35		/* Flags are first syscall argument.	*/
-        DO_CALL (SYS_ify (clone))
+	mov loc0=in0		/* save fn	*/
+	mov loc1=in4		/* save arg	*/
+	mov out0=in3		/* Flags are first syscall argument.	*/
+	mov out1=in1		/* Stack address.			*/
+	mov out2=in2		/* Stack size.				*/
+        DO_CALL (SYS_ify (clone2))
         cmp.eq p6,p0=-1,r10
 	;;
 (p6)	br.cond.spnt.few __syscall_error
@@ -64,18 +49,16 @@ ENTRY(__clone2)
 #	define PARENT p7
 	cmp.eq CHILD,PARENT=0,r8 /* Are we the child?	*/
 	;;
-(CHILD)	ld8 r34=[r14],8		/* Retrieve code pointer.	*/
-(CHILD)	mov ar.bspstore=r18	/* Set register backing store in the child */
-(CHILD)	mov r32=r16		/* Pass proper argument	to fn */
-	mov ar.rsc=r17		/* Restore RSE mode (both threads).	*/
+(CHILD)	ld8 out1=[loc0],8	/* Retrieve code pointer.	*/
+(CHILD)	mov out0=loc1		/* Pass proper argument	to fn */
 (PARENT) ret
 	;;
-	ld8 gp=[r14]		/* Load function gp.		*/
-	mov b6=r34
+	ld8 gp=[loc0]		/* Load function gp.		*/
+	mov b6=out1
 	;;
 	br.call.dptk.few rp=b6	/* Call fn(arg) in the child 	*/
 	;;
-	mov r32=r8		/* Argument to _exit		*/
+	mov out0=r8		/* Argument to _exit		*/
 	.globl _exit
 	br.call.dpnt.few rp=_exit /* call _exit with result from fn.	*/
 	ret			/* Not reached.		*/