mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-28 13:31:13 +00:00
581c785bf3
I used these shell commands: ../glibc/scripts/update-copyrights $PWD/../gnulib/build-aux/update-copyright (cd ../glibc && git commit -am"[this commit message]") and then ignored the output, which consisted lines saying "FOO: warning: copyright statement not found" for each of 7061 files FOO. I then removed trailing white space from math/tgmath.h, support/tst-support-open-dev-null-range.c, and sysdeps/x86_64/multiarch/strlen-vec.S, to work around the following obscure pre-commit check failure diagnostics from Savannah. I don't know why I run into these diagnostics whereas others evidently do not. remote: *** 912-#endif remote: *** 913: remote: *** 914- remote: *** error: lines with trailing whitespace found ... remote: *** error: sysdeps/unix/sysv/linux/statx_cp.c: trailing lines
89 lines
2.3 KiB
ArmAsm
89 lines
2.3 KiB
ArmAsm
/* Copyright (C) 1996-2022 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/>. */
|
|
|
|
/* 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), x0
|
|
void *child_stack, x1
|
|
int flags, x2
|
|
void *arg, x3
|
|
pid_t *ptid, x4
|
|
struct user_desc *tls, x5
|
|
pid_t *ctid); x6
|
|
*/
|
|
.text
|
|
ENTRY(__clone)
|
|
PTR_ARG (0)
|
|
PTR_ARG (1)
|
|
PTR_ARG (3)
|
|
PTR_ARG (4)
|
|
PTR_ARG (5)
|
|
PTR_ARG (6)
|
|
/* Save args for the child. */
|
|
mov x10, x0
|
|
mov x11, x2
|
|
mov x12, x3
|
|
|
|
/* Sanity check args. */
|
|
mov x0, #-EINVAL
|
|
cbz x10, .Lsyscall_error
|
|
/* Align sp. */
|
|
and x1, x1, -16
|
|
cbz x1, .Lsyscall_error
|
|
|
|
/* Do the system call. */
|
|
/* X0:flags, x1:newsp, x2:parenttidptr, x3:newtls, x4:childtid. */
|
|
mov x0, x2 /* flags */
|
|
/* New sp is already in x1. */
|
|
mov x2, x4 /* ptid */
|
|
mov x3, x5 /* tls */
|
|
mov x4, x6 /* ctid */
|
|
mov x8, #SYS_ify(clone)
|
|
svc 0x0
|
|
|
|
cmp x0, #0
|
|
beq thread_start
|
|
blt .Lsyscall_error
|
|
RET
|
|
PSEUDO_END (__clone)
|
|
|
|
.align 4
|
|
.type thread_start, %function
|
|
thread_start:
|
|
cfi_startproc
|
|
cfi_undefined (x30)
|
|
mov x29, 0
|
|
|
|
/* Pick the function arg and execute. */
|
|
mov x0, x12
|
|
blr x10
|
|
|
|
/* We are done, pass the return value through x0. */
|
|
mov x8, #SYS_ify(exit)
|
|
svc 0x0
|
|
cfi_endproc
|
|
.size thread_start, .-thread_start
|
|
|
|
libc_hidden_def (__clone)
|
|
weak_alias (__clone, clone)
|