mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-04 02:40:06 +00:00
5a82c74822
Also, change sources.redhat.com to sourceware.org.
This patch was automatically generated by running the following shell
script, which uses GNU sed, and which avoids modifying files imported
from upstream:
sed -ri '
s,(http|ftp)(://(.*\.)?(gnu|fsf|sourceware)\.org($|[^.]|\.[^a-z])),https\2,g
s,(http|ftp)(://(.*\.)?)sources\.redhat\.com($|[^.]|\.[^a-z]),https\2sourceware.org\4,g
' \
$(find $(git ls-files) -prune -type f \
! -name '*.po' \
! -name 'ChangeLog*' \
! -path COPYING ! -path COPYING.LIB \
! -path manual/fdl-1.3.texi ! -path manual/lgpl-2.1.texi \
! -path manual/texinfo.tex ! -path scripts/config.guess \
! -path scripts/config.sub ! -path scripts/install-sh \
! -path scripts/mkinstalldirs ! -path scripts/move-if-change \
! -path INSTALL ! -path locale/programs/charmap-kw.h \
! -path po/libc.pot ! -path sysdeps/gnu/errlist.c \
! '(' -name configure \
-execdir test -f configure.ac -o -f configure.in ';' ')' \
! '(' -name preconfigure \
-execdir test -f preconfigure.ac ';' ')' \
-print)
and then by running 'make dist-prepare' to regenerate files built
from the altered files, and then executing the following to cleanup:
chmod a+x sysdeps/unix/sysv/linux/riscv/configure
# Omit irrelevant whitespace and comment-only changes,
# perhaps from a slightly-different Autoconf version.
git checkout -f \
sysdeps/csky/configure \
sysdeps/hppa/configure \
sysdeps/riscv/configure \
sysdeps/unix/sysv/linux/csky/configure
# Omit changes that caused a pre-commit check to fail like this:
# remote: *** error: sysdeps/powerpc/powerpc64/ppc-mcount.S: trailing lines
git checkout -f \
sysdeps/powerpc/powerpc64/ppc-mcount.S \
sysdeps/unix/sysv/linux/s390/s390-64/syscall.S
# Omit change that caused a pre-commit check to fail like this:
# remote: *** error: sysdeps/sparc/sparc64/multiarch/memcpy-ultra3.S: last line does not end in newline
git checkout -f sysdeps/sparc/sparc64/multiarch/memcpy-ultra3.S
107 lines
2.8 KiB
ArmAsm
107 lines
2.8 KiB
ArmAsm
/* Copyright (C) 2001-2019 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>
|
|
#include <asm-syntax.h>
|
|
|
|
/* The userland implementation is:
|
|
int clone (int (*fn)(void *arg), void *child_stack, int flags, void *arg),
|
|
the kernel entry is:
|
|
int clone (long flags, void *child_stack).
|
|
|
|
The parameters are passed in register and on the stack from userland:
|
|
rdi: fn
|
|
rsi: child_stack
|
|
rdx: flags
|
|
rcx: arg
|
|
r8d: TID field in parent
|
|
r9d: thread pointer
|
|
%esp+8: TID field in child
|
|
|
|
The kernel expects:
|
|
rax: system call number
|
|
rdi: flags
|
|
rsi: child_stack
|
|
rdx: TID field in parent
|
|
r10: TID field in child
|
|
r8: thread pointer */
|
|
|
|
|
|
.text
|
|
ENTRY (__clone)
|
|
/* Sanity check arguments. */
|
|
movq $-EINVAL,%rax
|
|
testq %rdi,%rdi /* no NULL function pointers */
|
|
jz SYSCALL_ERROR_LABEL
|
|
testq %rsi,%rsi /* no NULL stack pointers */
|
|
jz SYSCALL_ERROR_LABEL
|
|
|
|
/* Insert the argument onto the new stack. */
|
|
subq $16,%rsi
|
|
movq %rcx,8(%rsi)
|
|
|
|
/* Save the function pointer. It will be popped off in the
|
|
child in the ebx frobbing below. */
|
|
movq %rdi,0(%rsi)
|
|
|
|
/* Do the system call. */
|
|
movq %rdx, %rdi
|
|
movq %r8, %rdx
|
|
movq %r9, %r8
|
|
mov 8(%rsp), %R10_LP
|
|
movl $SYS_ify(clone),%eax
|
|
|
|
/* End FDE now, because in the child the unwind info will be
|
|
wrong. */
|
|
cfi_endproc;
|
|
syscall
|
|
|
|
testq %rax,%rax
|
|
jl SYSCALL_ERROR_LABEL
|
|
jz L(thread_start)
|
|
|
|
ret
|
|
|
|
L(thread_start):
|
|
cfi_startproc;
|
|
/* Clearing frame pointer is insufficient, use CFI. */
|
|
cfi_undefined (rip);
|
|
/* Clear the frame pointer. The ABI suggests this be done, to mark
|
|
the outermost frame obviously. */
|
|
xorl %ebp, %ebp
|
|
|
|
/* Set up arguments for the function call. */
|
|
popq %rax /* Function to call. */
|
|
popq %rdi /* Argument. */
|
|
call *%rax
|
|
/* Call exit with return value from function call. */
|
|
movq %rax, %rdi
|
|
movl $SYS_ify(exit), %eax
|
|
syscall
|
|
cfi_endproc;
|
|
|
|
cfi_startproc;
|
|
PSEUDO_END (__clone)
|
|
|
|
libc_hidden_def (__clone)
|
|
weak_alias (__clone, clone)
|