Remove __ASSUME_VFORK_SYSCALL (and some __NR_vfork conditionals).

10 files changed, 34 insertions, 107 deletions

diff --git a/ChangeLog b/ChangeLog
index 67d9b3920a..6d7aefe43d 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,20 @@
+2012-08-01  Joseph Myers  <joseph@codesourcery.com>
+
+	* sysdeps/unix/sysv/linux/kernel-features.h
+	(__ASSUME_VFORK_SYSCALL): Remove all definitions.
+	* sysdeps/unix/sysv/linux/i386/vfork.S (__vfork) [__NR_vfork]:
+	Make code unconditional.
+	(__vfork) [__ASSUME_VFORK_SYSCALL]: Likewise.
+	(__vfork) [!__ASSUME_VFORK_SYSCALL]: Remove conditional code.
+	* sysdeps/unix/sysv/linux/powerpc/powerpc32/vfork.S (__vfork)
+	[__NR_vfork]: Make code unconditional.
+	(__vfork) [__ASSUME_VFORK_SYSCALL]: Likewise.
+	(__vfork) [!__ASSUME_VFORK_SYSCALL]: Remove conditional code.
+	* sysdeps/unix/sysv/linux/powerpc/powerpc64/vfork.S (__vfork)
+	[__NR_vfork]: Make code unconditional.
+	(__vfork) [__ASSUME_VFORK_SYSCALL]: Likewise.
+	(__vfork) [!__ASSUME_VFORK_SYSCALL]: Remove conditional code.
+
 2012-08-01  Roland McGrath  <roland@hack.frob.com>
 
 	* sysdeps/generic/sys/param.h (NGROUPS): Define only if [NGROUPS_MAX].
diff --git a/ports/ChangeLog.arm b/ports/ChangeLog.arm
index bbf9c68127..d7d9f4ce51 100644
--- a/ports/ChangeLog.arm
+++ b/ports/ChangeLog.arm
@@ -1,3 +1,8 @@
+2012-08-01  Joseph Myers  <joseph@codesourcery.com>
+
+	* sysdeps/unix/sysv/linux/arm/kernel-features.h
+	(__ASSUME_VFORK_SYSCALL): Remove.
+
 2012-08-01  Roland McGrath  <roland@hack.frob.com>
 
 	* sysdeps/arm/dl-machine.h (CLEAR_CACHE): Don't define it.
diff --git a/ports/ChangeLog.m68k b/ports/ChangeLog.m68k
index 84260c0d6b..993ba7fd28 100644
--- a/ports/ChangeLog.m68k
+++ b/ports/ChangeLog.m68k
@@ -1,3 +1,12 @@
+2012-08-01  Joseph Myers  <joseph@codesourcery.com>
+
+	* sysdeps/unix/sysv/linux/m68k/kernel-features.h
+	(__ASSUME_VFORK_SYSCALL): Remove.
+	* sysdeps/unix/sysv/linux/m68k/vfork.S (__vfork) [__NR_vfork]:
+	Make code unconditional.
+	(__vfork) [__ASSUME_VFORK_SYSCALL]: Likewise.
+	(__vfork) [!__ASSUME_VFORK_SYSCALL]: Remove conditional code.
+
 2012-08-01  Roland McGrath  <roland@hack.frob.com>
 
 	[BZ #14138]
diff --git a/ports/sysdeps/unix/sysv/linux/arm/kernel-features.h b/ports/sysdeps/unix/sysv/linux/arm/kernel-features.h
index 9092df7192..0ab5df094e 100644
--- a/ports/sysdeps/unix/sysv/linux/arm/kernel-features.h
+++ b/ports/sysdeps/unix/sysv/linux/arm/kernel-features.h
@@ -30,9 +30,6 @@
 /* Arm got fcntl64 in 2.4.4.  */
 #define __ASSUME_FCNTL64		1
 
-/* The vfork syscall on arm was definitely available in 2.4.  */
-#define __ASSUME_VFORK_SYSCALL		1
-
 /* The signal frame layout changed in 2.6.18.  */
 #if __LINUX_KERNEL_VERSION >= 132626
 # define __ASSUME_SIGFRAME_V2	1
diff --git a/ports/sysdeps/unix/sysv/linux/m68k/kernel-features.h b/ports/sysdeps/unix/sysv/linux/m68k/kernel-features.h
index 3b0b441aa4..05d06b2555 100644
--- a/ports/sysdeps/unix/sysv/linux/m68k/kernel-features.h
+++ b/ports/sysdeps/unix/sysv/linux/m68k/kernel-features.h
@@ -21,7 +21,6 @@
 #define __ASSUME_MMAP2_SYSCALL		1
 #define __ASSUME_STAT64_SYSCALL	1
 #define __ASSUME_FCNTL64		1
-#define __ASSUME_VFORK_SYSCALL		1
 
 /* Many syscalls were added in 2.6.10 for m68k.  */
 #if __LINUX_KERNEL_VERSION >= 132618
diff --git a/ports/sysdeps/unix/sysv/linux/m68k/vfork.S b/ports/sysdeps/unix/sysv/linux/m68k/vfork.S
index 24e0c9037c..d3e20d4067 100644
--- a/ports/sysdeps/unix/sysv/linux/m68k/vfork.S
+++ b/ports/sysdeps/unix/sysv/linux/m68k/vfork.S
@@ -36,8 +36,6 @@
 
 ENTRY (__vfork)
 
-#ifdef __NR_vfork
-
 	/* SAVE_PID clobbers call-clobbered registers and
 	   saves data in D1 and A1.  */
 
@@ -66,27 +64,8 @@ ENTRY (__vfork)
 	cfi_adjust_cfa_offset (4)
 	cfi_rel_offset (%pc, 0)
 
-# ifdef __ASSUME_VFORK_SYSCALL
-#  ifndef PIC
+#ifndef PIC
 	jbra	SYSCALL_ERROR_LABEL
-#  endif
-# else
-	/* Check if vfork syscall is known at all.  */
-	movel	#-ENOSYS,%d1
-	cmpl	%d0,%d1
-	jne	SYSCALL_ERROR_LABEL
-
-# endif
-#endif
-
-#ifndef __ASSUME_VFORK_SYSCALL
-	/* If we don't have vfork, fork is close enough.  */
-
-	movel	#SYS_ify (fork), %d0
-	trap	#0
-	tstl	%d0
-	jmi	SYSCALL_ERROR_LABEL
-	rts
 #endif
 
 PSEUDO_END (__vfork)
diff --git a/sysdeps/unix/sysv/linux/i386/vfork.S b/sysdeps/unix/sysv/linux/i386/vfork.S
index a8a7e45670..11c530de5f 100644
--- a/sysdeps/unix/sysv/linux/i386/vfork.S
+++ b/sysdeps/unix/sysv/linux/i386/vfork.S
@@ -28,8 +28,6 @@
 
 ENTRY (__vfork)
 
-#ifdef __NR_vfork
-
 	/* Pop the return PC value into ECX.  */
 	popl	%ecx
 	cfi_adjust_cfa_offset (-4)
@@ -55,31 +53,10 @@ ENTRY (__vfork)
 
 	cmpl	$-4095, %eax
 	/* Branch forward if it failed.  */
-# ifdef __ASSUME_VFORK_SYSCALL
 	jae	SYSCALL_ERROR_LABEL
-# else
-	jae	.Lerror
-# endif
 
 	ret
 
-# ifndef __ASSUME_VFORK_SYSCALL
-.Lerror:
-	/* Check if vfork syscall is known at all.  */
-	cmpl	$-ENOSYS, %eax
-	jne	SYSCALL_ERROR_LABEL
-# endif
-#endif
-
-#ifndef __ASSUME_VFORK_SYSCALL
-	/* If we don't have vfork, fork is close enough.  */
-
-	movl	$SYS_ify (fork), %eax
-	int	$0x80
-	cmpl	$-4095, %eax
-	jae	SYSCALL_ERROR_LABEL
-	ret
-#endif
 PSEUDO_END (__vfork)
 libc_hidden_def (__vfork)
 
diff --git a/sysdeps/unix/sysv/linux/kernel-features.h b/sysdeps/unix/sysv/linux/kernel-features.h
index cfe335d0bd..7357165618 100644
--- a/sysdeps/unix/sysv/linux/kernel-features.h
+++ b/sysdeps/unix/sysv/linux/kernel-features.h
@@ -100,12 +100,6 @@
    MIPS n32).  */
 #define __ASSUME_GETDENTS64_SYSCALL	1
 
-/* Starting with 2.4.5 kernels the vfork syscall made it into the
-   official kernel for PPC.  */
-#ifdef __powerpc__
-# define __ASSUME_VFORK_SYSCALL		1
-#endif
-
 /* Starting with 2.4.5 kernels the mmap2 syscall made it into the official
    kernel.  But PowerPC64 does not support a separate MMAP2 call.  */
 #if defined __powerpc__ && !defined __powerpc64__
@@ -118,11 +112,6 @@
 # define __ASSUME_SET_THREAD_AREA_SYSCALL	1
 #endif
 
-/* The vfork syscall on x86 and arm was definitely available in 2.4.  */
-#ifdef __i386__
-# define __ASSUME_VFORK_SYSCALL		1
-#endif
-
 /* The late 2.5 kernels saw a lot of new CLONE_* flags.  Summarize
    their availability with one define.  The changes were made first
    for i386 and the have to be done separately for the other archs.
diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc32/vfork.S b/sysdeps/unix/sysv/linux/powerpc/powerpc32/vfork.S
index 6625e207a9..ca20f7bebd 100644
--- a/sysdeps/unix/sysv/linux/powerpc/powerpc32/vfork.S
+++ b/sysdeps/unix/sysv/linux/powerpc/powerpc32/vfork.S
@@ -1,4 +1,4 @@
-/* Copyright (C) 2003 Free Software Foundation, Inc.
+/* Copyright (C) 2003-2012 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
@@ -26,32 +26,8 @@
    and the process ID of the new process to the old process.  */
 
 ENTRY (__vfork)
-
-#ifdef __NR_vfork
-
 	DO_CALL (SYS_ify (vfork))
-
-# ifdef __ASSUME_VFORK_SYSCALL
 	PSEUDO_RET
-# else
-	bnslr+
-	/* Check if vfork syscall is known at all.  */
-	cmpwi	r3,ENOSYS
-	bne-	.Lsyscall_error
-
-# endif
-#endif
-
-#ifndef __ASSUME_VFORK_SYSCALL
-	/* If we don't have vfork, fork is close enough.  */
-
-	DO_CALL (SYS_ify (fork))
-	bnslr+
-
-.Lsyscall_error:
-	b	__syscall_error@local
-#endif
-
 PSEUDO_END (__vfork)
 libc_hidden_def (__vfork)
 
diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc64/vfork.S b/sysdeps/unix/sysv/linux/powerpc/powerpc64/vfork.S
index 7baefd0c16..3ce38be884 100644
--- a/sysdeps/unix/sysv/linux/powerpc/powerpc64/vfork.S
+++ b/sysdeps/unix/sysv/linux/powerpc/powerpc64/vfork.S
@@ -1,4 +1,4 @@
-/* Copyright (C) 2003 Free Software Foundation, Inc.
+/* Copyright (C) 2003-2012 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
@@ -27,29 +27,8 @@
 
 ENTRY (__vfork)
 	CALL_MCOUNT 0
-
-#ifdef __NR_vfork
-
 	DO_CALL (SYS_ify (vfork))
-
-# ifdef __ASSUME_VFORK_SYSCALL
-	PSEUDO_RET
-# else
-	bnslr+
-	/* Check if vfork syscall is known at all.  */
-	cmpdi	r3,ENOSYS
-	bne	.Local_syscall_error
-
-# endif
-#endif
-
-#ifndef __ASSUME_VFORK_SYSCALL
-	/* If we don't have vfork, fork is close enough.  */
-
-	DO_CALL (SYS_ify (fork))
 	PSEUDO_RET
-#endif
-
 PSEUDO_END (__vfork)
 libc_hidden_def (__vfork)