SH: Consolidate NPTL/non versions of vfork

sysdeps/unix/sysv/linux/sh/vfork.S

@@ -1,4 +1,4 @@
-/* Copyright (C) 1999-2014 Free Software Foundation, Inc.
+/* Copyright (C) 2004-2014 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
@@ -18,53 +18,56 @@
 #include <sysdep.h>
 #define _ERRNO_H	1
 #include <bits/errno.h>
+#include <tcb-offsets.h>
 
 /* Clone the calling process, but without copying the whole address space.
    The calling process is suspended until the new process exits or is
    replaced by a call to `execve'.  Return -1 for errors, 0 to the new process,
    and the process ID of the new process to the old process.  */
 
-ENTRY (__vfork)
-
-#ifdef __NR_vfork
-	mov.w	.L3, r3
-	trapa	#0x10
-	mov     r0, r1
-	mov	#-12, r2
-	shad	r2, r1
-	not	r1, r1			// r1=0 means r0 = -1 to -4095
-	tst	r1, r1			// i.e. error in linux
+ENTRY (__libc_vfork)
+	/* Save the PID value.  */
+	stc	gbr, r2
+	mov.w	.L2, r0
+	mov.l	@(r0,r2), r4
+	neg	r4, r1
+	tst	r1, r1
 	bf	1f
-	mov.w	.L1, r1
-	cmp/eq	r1, r0
-	bt	2f
-	bra	.Lsyscall_error
-	 nop
-.L1:
-	.word	-ENOSYS
-.L3:	.word	__NR_vfork
+	mov	#1, r1
+	rotr	r1
 1:
-	rts
-	 nop
-2:
-#endif
+	mov.l	r1, @(r0,r2)
 
-	/* If we don't have vfork, fork is close enough.  */
-	mov	#+__NR_fork, r3
+	mov.w	.L1, r3
 	trapa	#0x10
 	mov     r0, r1
+
+	/* Restore the old PID value in the parent.  */
+	tst	r0, r0
+	bt.s	2f
+	 stc	gbr, r2
+	mov.w	.L2, r0
+	mov.l	r4, @(r0,r2)
+	mov	r1, r0
+2:
 	mov	#-12, r2
 	shad	r2, r1
 	not	r1, r1			// r1=0 means r0 = -1 to -4095
 	tst	r1, r1			// i.e. error in linux
 	bf	.Lpseudo_end
-.Lsyscall_error:
 	SYSCALL_ERROR_HANDLER
 .Lpseudo_end:
 	rts
 	 nop
+.L1:
+	.word	__NR_vfork
+.L2:
+	.word	PID - TLS_PRE_TCB_SIZE
+	.align	2
+PSEUDO_END (__libc_vfork)
 
-PSEUDO_END (__vfork)
+#if !NOT_IN_libc
+weak_alias (__libc_vfork, vfork)
+strong_alias (__libc_vfork, __vfork)
 libc_hidden_def (__vfork)
-
-weak_alias (__vfork, vfork)
+#endif