| 123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869 |
- /* Copyright (C) 2003 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, see
- <http://www.gnu.org/licenses/>. */
- #include <sysdep-cancel.h>
- .align 4
- .globl __vfork
- .type __vfork, @function
- .usepv __vfork, std
- cfi_startproc
- __vfork:
- ldgp gp, 0(pv)
- PSEUDO_PROF
- #ifdef SHARED
- ldq t0, __libc_pthread_functions(gp) !gprel
- bne t0, HIDDEN_JUMPTARGET (fork) !samegp
- #else
- .weak pthread_create
- ldq t0, pthread_create(gp) !literal
- bne t0, $do_fork
- #endif
- lda v0, SYS_ify(vfork)
- call_pal PAL_callsys
- bne a3, SYSCALL_ERROR_LABEL
- ret
- #ifndef SHARED
- /* Can't tail-call due to possible mismatch between GP in
- fork and vfork object files. */
- $do_fork:
- subq sp, 16, sp
- cfi_adjust_cfa_offset(16)
- stq ra, 0(sp)
- cfi_offset(ra, -16)
- jsr ra, HIDDEN_JUMPTARGET (fork)
- ldgp gp, 0(ra)
- ldq ra, 0(sp)
- addq sp, 16, sp
- cfi_restore(ra)
- cfi_adjust_cfa_offset(-16)
- ret
- $syscall_error:
- SYSCALL_ERROR_HANDLER
- #endif
- cfi_endproc
- .size __vfork, .-__vfork
- libc_hidden_def (__vfork)
- weak_alias (__vfork, vfork)
|
