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author | caiyinyu <caiyinyu@loongson.cn> | 2022-07-19 09:20:50 +0800 |
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committer | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2022-07-26 12:35:12 -0300 |
commit | 45955fe61844d94f7faa660eda9e515a6571e8c3 (patch) | |
tree | 604ccc92c973e5a8b59e90d322e91f588422b391 /sysdeps/unix/sysv/linux/loongarch/vfork.S | |
parent | 327588226198995d2daa62e127ef45af9bcf182d (diff) | |
download | glibc-45955fe61844d94f7faa660eda9e515a6571e8c3.tar.gz glibc-45955fe61844d94f7faa660eda9e515a6571e8c3.tar.xz glibc-45955fe61844d94f7faa660eda9e515a6571e8c3.zip |
LoongArch: Linux Syscall Interface
Diffstat (limited to 'sysdeps/unix/sysv/linux/loongarch/vfork.S')
-rw-r--r-- | sysdeps/unix/sysv/linux/loongarch/vfork.S | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/loongarch/vfork.S b/sysdeps/unix/sysv/linux/loongarch/vfork.S new file mode 100644 index 0000000000..fcc84e3549 --- /dev/null +++ b/sysdeps/unix/sysv/linux/loongarch/vfork.S @@ -0,0 +1,50 @@ +/* vfork for Linux. + Copyright (C) 2022 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 + <https://www.gnu.org/licenses/>. */ + +#include <sysdep.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) + + li.d a0, 0x4111 /* CLONE_VM | CLONE_VFORK | SIGCHLD */ + add.d a1, zero, sp + + /* Do the system call. */ + li.d a7, __NR_clone + syscall 0 + + blt a0, zero ,L (error) + + ret + +L (error): + b __syscall_error + +END (__vfork) + +libc_hidden_def (__vfork) + +weak_alias (__vfork, vfork) +strong_alias (__vfork, __libc_vfork) |