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Update.
* sysdeps/unix/sysv/linux/i386/vfork.S: Rewrite to use clone. * sysdeps/unix/sysv/linux/bits/sched.h: Define CLONE_VFORK.
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@ -1,5 +1,9 @@
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1999-01-19 Ulrich Drepper <drepper@cygnus.com>
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* sysdeps/unix/sysv/linux/i386/vfork.S: Rewrite to use clone.
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* sysdeps/unix/sysv/linux/bits/sched.h: Define CLONE_VFORK.
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* timezone/zdump.c: Update from tzcode1999a.
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* timezone/zic.c: Likewise.
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@ -1,6 +1,6 @@
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/* Definitions of constants and data structure for POSIX 1003.1b-1993
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scheduling interface.
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Copyright (C) 1996, 1997, 1998 Free Software Foundation, Inc.
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Copyright (C) 1996, 1997, 1998, 1999 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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@ -39,6 +39,8 @@
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# define CLONE_SIGHAND 0x00000800 /* Set if signal handlers shared. */
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# define CLONE_PID 0x00001000 /* Set if pid shared. */
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# define CLONE_PTRACE 0x00002000 /* Set if tracing continues on the child. */
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# define CLONE_VFORK 0x00004000 /* Set if the parent wants the child to
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wake it up on mm_release. */
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#endif
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/* The official definition. */
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@ -1,6 +1,6 @@
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/* Copyright (C) 1999 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Andreas Schwab <schwab@gnu.org>.
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Contributed by Ulrich Drepper <drepper@cygnus.com>, 1999.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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@ -28,37 +28,21 @@
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ENTRY (__vfork)
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#ifdef __NR_vfork
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/* We have to use the clone() system call. The flags to use are
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CLONE_VFORK | CLONE_VM
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and we send SIGCHLD on termination (i.e., flags = 0x4111). */
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/* Pop the return PC value into ECX. */
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popl %ecx
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/* Stuff the syscall number in EAX and enter into the kernel. */
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movl $SYS_ify (vfork), %eax
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int $0x80
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cmpl $-4095, %eax
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jae .Lerror /* Branch forward if it failed. */
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/* Jump to the return PC. */
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jmp *%ecx
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.Lerror:
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/* Push back the return PC. */
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pushl %ecx
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/* Check if vfork syscall is known at all. */
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cmpl $-ENOSYS, %eax
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jne SYSCALL_ERROR_LABEL
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#endif
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/* If we don't have vfork, fork is close enough. */
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movl $SYS_ify (fork), %eax
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popl %edx /* Pop return address. */
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pushl %ebx
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movl %esp, %ecx
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movl $0x4111, %ebx
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movl $SYS_ify(clone), %eax
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int $0x80
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popl %ebx
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pushl %edx
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cmpl $-4095, %eax
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jae SYSCALL_ERROR_LABEL
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.Lpseudo_end:
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L(pseudo_end):
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ret
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PSEUDO_END (__vfork)
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