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- /*
- * Copyright (C) 2016 Andes Technology, Inc.
- * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
- */
- /* Copyright (C) 1999, 2002, 2003 Free Software Foundation, Inc.
- Contributed by Philip Blundell <philb@gnu.org>.
- 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 <sys/syscall.h>
- #include <sysdep.h>
- #define _ERRNO_H 1
- /* 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 PIC
- .pic
- #endif
- #ifdef __NR_vfork
- syscall __NR_vfork
- bltz $r0, 2f
- 1:
- ret
- 2:
- sltsi $r1, $r0, -4096
- bnez $r1, 1b;
- # ifdef PIC
- #ifdef __NDS32_N1213_43U1H__
- ! save lp
- addi $r2, $lp, 0
- ! set r1 as gp
- jal 1b
- sethi $r1, hi20(_GLOBAL_OFFSET_TABLE_)
- ori $r1, $r1, lo12(_GLOBAL_OFFSET_TABLE_+4)
- add $r1, $lp, $r1
- ! restore lp
- addi $lp, $r2, 0
- #else
- ! set r1 as gp
- mfusr $r15, $PC
- sethi $r1, hi20(_GLOBAL_OFFSET_TABLE_+4)
- ori $r1, $r1, lo12(_GLOBAL_OFFSET_TABLE_+8)
- add $r1, $r1, $r15
- #endif
- ! r15=C_SYMBOL_NAME(__syscall_error)@PLT
- sethi $r15, hi20(C_SYMBOL_NAME(__syscall_error)@PLT)
- ori $r15, $r15, lo12(C_SYMBOL_NAME(__syscall_error)@PLT)
- add $r15, $r15, $r1
- ! jump to SYSCALL_ERROR
- jr $r15
- # else
- j C_SYMBOL_NAME(__syscall_error)
- # endif
- #else
- # error "__NR_vfork not available"
- #endif
- PSEUDO_END (__vfork)
- weak_alias (__vfork, vfork)
- libc_hidden_def(vfork)
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