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- /* Copyright (C) 2003, 2004 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
- modify it under the terms of the GNU Lesser General Public
- License as published by the Free Software Foundation; either
- version 2.1 of the License, or (at your option) any later version.
- The GNU C Library is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Lesser General Public License for more details.
- You should have received a copy of the GNU Lesser General Public
- License along with the GNU C Library; if not, write to the Free
- Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
- 02111-1307 USA. */
- #include <sysdep-cancel.h>
- #define _ERRNO_H 1
- #include <bits/errno.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 SHARED
- mov.l .Lgot, r1
- mova .Lgot, r0
- add r0, r1
- mov.l .Lpthread_func, r0
- mov.l @(r0,r1), r0
- #else
- mov.l .Lpthread_create, r0
- #endif
- tst r0, r0
- bf .Lhidden_fork
- mov.w .L1, 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
- bf .Lpseudo_end
- SYSCALL_ERROR_HANDLER
- .Lpseudo_end:
- rts
- nop
- .L1: .word __NR_vfork
- .align 2
- #ifdef SHARED
- .Lgot:
- .long _GLOBAL_OFFSET_TABLE_
- .Lpthread_func:
- .long __libc_pthread_functions@GOTOFF
- #else
- .Lpthread_create:
- .weak pthread_create
- .long pthread_create
- #endif
- .Lhidden_fork:
- mov.l .L2, r1
- braf r1
- nop
- 1:
- .align 2
- .L2: .long HIDDEN_JUMPTARGET(__fork)-1b
- PSEUDO_END (__vfork)
- libc_hidden_def (__vfork)
- weak_alias (__vfork, vfork)
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