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- /* vi: set sw=4 ts=4: */
- /* vfork for uClibc
- *
- * Copyright (C) 2000 by Lineo, inc. and Erik Andersen
- * Copyright (C) 2000-2006 by Erik Andersen <andersen@uclibc.org>
- * Written by Erik Andersen <andersen@uclibc.org>
- *
- * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
- */
- #include <features.h>
- #define _ERRNO_H
- #include <bits/errno.h>
- #include <sys/syscall.h>
- #ifdef __NR_fork
- .text
- .global __vfork
- .hidden __vfork
- .type __vfork,%function
- .align 4
- __vfork:
- #ifdef __NR_vfork
- DO_CALL (vfork)
- cmn r0, #4096
- #if defined(__THUMB_INTERWORK__)
- bxcc lr
- #else
- movcc pc, lr
- #endif
- /* Check if vfork even exists. */
- ldr r1, =-ENOSYS
- teq r0, r1
- bne __error
- #endif
- /* If we don't have vfork, use fork. */
- DO_CALL (fork)
- cmn r0, #4096
- /* Syscall worked. Return to child/parent */
- #if defined(__THUMB_INTERWORK__)
- bxcc lr
- #else
- movcc pc, lr
- #endif
- __error:
- b __syscall_error
- .size __vfork,.-__vfork
- weak_alias(__vfork,vfork)
- libc_hidden_def(vfork)
- #endif
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