mirror of
https://sourceware.org/git/glibc.git
synced 2025-11-03 20:53:13 +03:00
688903eb3e
* All files with FSF copyright notices: Update copyright dates using scripts/update-copyrights. * locale/programs/charmap-kw.h: Regenerated. * locale/programs/locfile-kw.h: Likewise.
74 lines
2.1 KiB
ArmAsm
74 lines
2.1 KiB
ArmAsm
/* Copyright (C) 1996-2018 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/>. */
|
|
|
|
/* clone() is even more special than fork() as it mucks with stacks
|
|
and invokes a function in the right context after its all over. */
|
|
|
|
#include <sysdep.h>
|
|
#define _ERRNO_H 1
|
|
#include <bits/errno.h>
|
|
|
|
/* int clone (int (*fn)(void *arg), void *child_stack, int flags, void *arg,
|
|
pid_t *ptid, struct user_desc *tls, pid_t *ctid);
|
|
|
|
INCOMING: r5 (fn), r6 (child_stack), r7 (flags), r8 (arg), r9 (ptid)
|
|
r10 (tls), 28 (r1) ctid
|
|
|
|
OUTGOING:
|
|
|
|
linux: arch/microblaze/entry.S: sys_clone expects
|
|
r5 (flags) r6 (child stack) r7 (stack_size) r8 (ptid)r9 (ctid)
|
|
r10 (tls)
|
|
*/
|
|
|
|
.text
|
|
ENTRY (__clone)
|
|
addik r3,r0,-EINVAL
|
|
beqi r5,SYSCALL_ERROR_LABEL ; // Invalid func
|
|
beqi r6,SYSCALL_ERROR_LABEL ; // Invalid stack
|
|
addik r6,r6,-8
|
|
swi r5,r6,0 ; // Push fn onto child's stack
|
|
swi r8,r6,4 ; // Push arg for child
|
|
addk r5,r0,r7 ; // flags for clone() syscall
|
|
addk r7,r0,r0
|
|
addk r8,r0,r9 ; // parent tid ptr
|
|
lwi r9,r1,28 ; // child tid ptr
|
|
addik r12,r0,SYS_ify(clone)
|
|
brki r14,8
|
|
addk r0,r0,r0
|
|
addik r4,r0,-4095
|
|
cmpu r4,r4,r3
|
|
bgei r4,SYSCALL_ERROR_LABEL
|
|
beqi r3,L(thread_start)
|
|
rtsd r15,8
|
|
nop
|
|
|
|
L(thread_start):
|
|
lwi r12,r1,0 ; // fn
|
|
lwi r5,r1,4 ; // arg
|
|
brald r15,r12
|
|
nop
|
|
addk r5,r0,r3
|
|
addik r12,r0,SYS_ify(exit)
|
|
brki r14,8
|
|
nop
|
|
PSEUDO_END(__clone)
|
|
|
|
libc_hidden_def (__clone)
|
|
weak_alias (__clone,clone)
|