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Refactor Linux ARCH_FORK implementation

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This patch refactors the ARCH_FORK macro and the required architecture
specific header to simplify the required architecture definitions
to provide the fork syscall semantic and proper document current
Linux clone ABI variant.

Instead of require the reimplementation of arch-fork.h header, this
patch changes the ARCH_FORK to an inline function with clone ABI
defined by kernel-features.h define.  The generic kernel ABI meant
for newer ports is used as default and redefine if the architecture
requires.

Checked on x86_64-linux-gnu and i686-linux-gnu.  Also with a build
for all the afected ABIs.

	* sysdeps/nptl/fork.c (ARCH_FORK): Replace by auch_fork.
	* sysdeps/unix/sysv/linux/alpha/arch-fork.h: Remove file.
	* sysdeps/unix/sysv/linux/riscv/arch-fork.h: Likewise.
	* sysdeps/unix/sysv/linux/aarch64/arch-fork.h: Likewise.
	* sysdeps/unix/sysv/linux/arm/arch-fork.h: Likewise.
	* sysdeps/unix/sysv/linux/hppa/arch-fork.h: Likewise.
	* sysdeps/unix/sysv/linux/i386/arch-fork.h: Likewise.
	* sysdeps/unix/sysv/linux/ia64/arch-fork.h: Likewise.
	* sysdeps/unix/sysv/linux/m68k/arch-fork.h: Likewise.
	* sysdeps/unix/sysv/linux/microblaze/arch-fork.h: Likewise.
	* sysdeps/unix/sysv/linux/mips/arch-fork.h: Likewise.
	* sysdeps/unix/sysv/linux/nios2/arch-fork.h: Likewise.
	* sysdeps/unix/sysv/linux/powerpc/arch-fork.h: Likewise.
	* sysdeps/unix/sysv/linux/s390/arch-fork.h: Likewise.
	* sysdeps/unix/sysv/linux/sh/arch-fork.h: Likewise.
	* sysdeps/unix/sysv/linux/sparc/arch-fork.h: Likewise.
	* sysdeps/unix/sysv/linux/tile/arch-fork.h: Likewise.
	* sysdeps/unix/sysv/linux/x86_64/arch-fork.h: Likewise.
	* sysdeps/unix/sysv/linux/arch-fork.h (arch_fork): New function.
	* sysdeps/unix/sysv/linux/aarch64/kernel-features.h: New file.
	* sysdeps/unix/sysv/linux/riscv/kernel-features.h: Likewise.
	* sysdeps/unix/sysv/linux/arm/kernel-features.h
	(__ASSUME_CLONE_BACKWARDS): Define.
	* sysdeps/unix/sysv/linux/createthread.c (ARCH_CLONE): Define to
	__clone2 if __NR_clone2 is defined.
	* sysdeps/unix/sysv/linux/hppa/kernel-features.h
	(__ASSUME_CLONE_BACKWARDS): Likewise.
	* sysdeps/unix/sysv/linux/i386/kernel-features.h
	(__ASSUME_CLONE_BACKWARDS): Likewise.
	* sysdeps/unix/sysv/linux/ia64/kernel-features.h
	(__ASSUME_CLONE2): Likewise.
	* sysdeps/unix/sysv/linux/microblaze/kernel-features.h
	(__ASSUME_CLONE_BACKWARDS3): Likewise.
	* sysdeps/unix/sysv/linux/kernel-features.h: Document possible clone
	variants and the define architecture can use.
	(__ASSUME_CLONE_DEFAULT): Define as default.
	* sysdeps/unix/sysv/linux/mips/kernel-features.h
	(__ASSUME_CLONE_BACKWARDS): Likewise.
	* sysdeps/unix/sysv/linux/powerpc/kernel-features.h
	(__ASSUME_CLONE_BACKWARDS): Likewise.
	* sysdeps/unix/sysv/linux/s390/kernel-features.h
	(__ASSUME_CLONE_BACKWARDS2): Likewise.
This commit is contained in:
Adhemerval Zanella 2018-01-05 15:38:06 -02:00
parent 4e54d91863
commit 3dc214977b
30 changed files with 154 additions and 413 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

45
ChangeLog
View File

@ -1,3 +1,48 @@
2018-03-07 Adhemerval Zanella <adhemerval.zanella@linaro.org>
* sysdeps/nptl/fork.c (ARCH_FORK): Replace by auch_fork.
* sysdeps/unix/sysv/linux/alpha/arch-fork.h: Remove file.
* sysdeps/unix/sysv/linux/riscv/arch-fork.h: Likewise.
* sysdeps/unix/sysv/linux/aarch64/arch-fork.h: Likewise.
* sysdeps/unix/sysv/linux/arm/arch-fork.h: Likewise.
* sysdeps/unix/sysv/linux/hppa/arch-fork.h: Likewise.
* sysdeps/unix/sysv/linux/i386/arch-fork.h: Likewise.
* sysdeps/unix/sysv/linux/ia64/arch-fork.h: Likewise.
* sysdeps/unix/sysv/linux/m68k/arch-fork.h: Likewise.
* sysdeps/unix/sysv/linux/microblaze/arch-fork.h: Likewise.
* sysdeps/unix/sysv/linux/mips/arch-fork.h: Likewise.
* sysdeps/unix/sysv/linux/nios2/arch-fork.h: Likewise.
* sysdeps/unix/sysv/linux/powerpc/arch-fork.h: Likewise.
* sysdeps/unix/sysv/linux/s390/arch-fork.h: Likewise.
* sysdeps/unix/sysv/linux/sh/arch-fork.h: Likewise.
* sysdeps/unix/sysv/linux/sparc/arch-fork.h: Likewise.
* sysdeps/unix/sysv/linux/tile/arch-fork.h: Likewise.
* sysdeps/unix/sysv/linux/x86_64/arch-fork.h: Likewise.
* sysdeps/unix/sysv/linux/arch-fork.h (arch_fork): New function.
* sysdeps/unix/sysv/linux/aarch64/kernel-features.h: New file.
* sysdeps/unix/sysv/linux/riscv/kernel-features.h: Likewise.
* sysdeps/unix/sysv/linux/arm/kernel-features.h
(__ASSUME_CLONE_BACKWARDS): Define.
* sysdeps/unix/sysv/linux/createthread.c (ARCH_CLONE): Define to
__clone2 if __NR_clone2 is defined.
* sysdeps/unix/sysv/linux/hppa/kernel-features.h
(__ASSUME_CLONE_BACKWARDS): Likewise.
* sysdeps/unix/sysv/linux/i386/kernel-features.h
(__ASSUME_CLONE_BACKWARDS): Likewise.
* sysdeps/unix/sysv/linux/ia64/kernel-features.h
(__ASSUME_CLONE2): Likewise.
* sysdeps/unix/sysv/linux/microblaze/kernel-features.h
(__ASSUME_CLONE_BACKWARDS3): Likewise.
* sysdeps/unix/sysv/linux/kernel-features.h: Document possible clone
variants and the define architecture can use.
(__ASSUME_CLONE_DEFAULT): Define as default.
* sysdeps/unix/sysv/linux/mips/kernel-features.h
(__ASSUME_CLONE_BACKWARDS): Likewise.
* sysdeps/unix/sysv/linux/powerpc/kernel-features.h
(__ASSUME_CLONE_BACKWARDS): Likewise.
* sysdeps/unix/sysv/linux/s390/kernel-features.h
(__ASSUME_CLONE_BACKWARDS2): Likewise.
2018-03-06 Siddhesh Poyarekar <siddhesh@sourceware.org>
* sysdeps/aarch64/memcmp.S (more16): Fix loop16 branch target.

8
sysdeps/nptl/fork.c
View File

@ -73,13 +73,7 @@ __libc_fork (void)
call_function_static_weak (__malloc_fork_lock_parent);
}
#ifdef ARCH_FORK
pid = ARCH_FORK ();
#else
# error "ARCH_FORK must be defined so that the CLONE_SETTID flag is used"
pid = INLINE_SYSCALL (fork, 0);
#endif
pid = arch_fork (&THREAD_SELF->tid);
if (pid == 0)
{

15
sysdeps/unix/sysv/linux/riscv/arch-fork.h → sysdeps/unix/sysv/linux/aarch64/kernel-features.h
View File

@ -1,5 +1,6 @@
/* Internal definitions for thread-friendly fork implementation. Linux/RISC-V.
Copyright (C) 2002-2018 Free Software Foundation, Inc.
/* Set flags signalling availability of kernel features based on given
kernel version number. AArch64 version.
Copyright (C) 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
@ -16,11 +17,7 @@
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#include <sched.h>
#include <sysdep.h>
#include <tls.h>
#include_next <kernel-features.h>
#define ARCH_FORK() \
INLINE_SYSCALL (clone, 5, \
CLONE_CHILD_SETTID | CLONE_CHILD_CLEARTID | SIGCHLD, 0, \
NULL, NULL, &THREAD_SELF->tid)
#undef __ASSUME_CLONE_DEFAULT
#define __ASSUME_CLONE_BACKWARDS 1

28
sysdeps/unix/sysv/linux/alpha/arch-fork.h
View File

@ -1,28 +0,0 @@
/* ARCH_FORK definition for Linux fork implementation. Alpha version.
Copyright (C) 2003-2018 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/>. */
#include <sched.h>
#include <signal.h>
#include <sysdep.h>
#include <tls.h>
#define ARCH_FORK() \
INLINE_SYSCALL (clone, 5, \
CLONE_CHILD_SETTID | CLONE_CHILD_CLEARTID | SIGCHLD, \
NULL, NULL, &THREAD_SELF->tid, NULL)

43
sysdeps/unix/sysv/linux/arch-fork.h
View File

@ -1,4 +1,4 @@
/* ARCH_FORK definition for Linux fork implementation. Stub version.
/* arch_fork definition for Linux fork implementation.
Copyright (C) 2014-2018 Free Software Foundation, Inc.
This file is part of the GNU C Library.
@ -16,12 +16,37 @@
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
/* This file should define the function-like macro of no arguments
ARCH_FORK to an INLINE_SYSCALL invocation of the clone-like system
call, passing the CLONE_CHILD_SETTID and CLONE_CHILD_CLEARTID flags
and &THREAD_SELF->tid as the TID address.
#ifndef __ARCH_FORK_H
#define __ARCH_FORK_H
Machines that lack an arch-fork.h header file will hit an #error in
fork.c; this stub file doesn't contain an #error itself mainly for
the transition period of migrating old machine-specific fork.c files
to machine-specific arch-fork.h instead. */
#include <unistd.h>
/* Call the clone syscall with fork semantic. The CTID address is used
to store the child thread ID at its locationm, to erase it in child memory
when the child exits, and do a wakeup on the futex at that address.
The architecture with non-default kernel abi semantic should correctlly
override it with one of the supported calling convention (check generic
kernel-features.h for the clone abi variants). */
static inline pid_t
arch_fork (void *ctid)
{
const int flags = CLONE_CHILD_SETTID | CLONE_CHILD_CLEARTID | SIGCHLD;
long int ret;
#ifdef __ASSUME_CLONE_BACKWARDS
ret = INLINE_SYSCALL_CALL (clone, flags, 0, NULL, 0, ctid);
#elif defined(__ASSUME_CLONE_BACKWARDS2)
ret = INLINE_SYSCALL_CALL (clone, 0, flags, NULL, ctid, 0);
#elif defined(__ASSUME_CLONE_BACKWARDS3)
ret = INLINE_SYSCALL_CALL (clone, flags, 0, 0, NULL, ctid, 0);
#elif defined(__ASSUME_CLONE2)
ret = INLINE_SYSCALL_CALL (clone2, flags, 0, 0, NULL, ctid, 0);
#elif defined(__ASSUME_CLONE_DEFAULT)
ret = INLINE_SYSCALL_CALL (clone, flags, 0, NULL, ctid, 0);
#else
# error "Undefined clone variant"
#endif
return ret;
}
#endif /* __ARCH_FORK_H */

27
sysdeps/unix/sysv/linux/arm/arch-fork.h
View File

@ -1,27 +0,0 @@
/* ARCH_FORK definition for Linux fork implementation. ARM version.
Copyright (C) 2014-2018 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/>. */
#include <sched.h>
#include <sysdep.h>
#include <tls.h>
#define ARCH_FORK() \
INLINE_SYSCALL (clone, 5, \
CLONE_CHILD_SETTID | CLONE_CHILD_CLEARTID | SIGCHLD, \
NULL, NULL, NULL, &THREAD_SELF->tid)

3
sysdeps/unix/sysv/linux/arm/kernel-features.h
View File

@ -39,3 +39,6 @@
#define __ASSUME_RECV_SYSCALL 1
#define __ASSUME_SEND_SYSCALL 1
#undef __ASSUME_CLONE_DEFAULT
#define __ASSUME_CLONE_BACKWARDS 1

5
sysdeps/unix/sysv/linux/createthread.c
View File

@ -28,8 +28,9 @@
#include <arch-fork.h>
#ifndef ARCH_CLONE
#ifdef __NR_clone2
# define ARCH_CLONE __clone2
#else
# define ARCH_CLONE __clone
#endif

32
sysdeps/unix/sysv/linux/hppa/arch-fork.h
View File

@ -1,32 +0,0 @@
/* ARCH_FORK definition for Linux fork implementation. HPPA version.
Copyright (C) 2005-2018 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/>. */
#include <sched.h>
#include <signal.h>
#include <sysdep.h>
#include <tls.h>
/* Argument 1 - Clone flags.
2 - Child stack pointer.
3 - Parent tid pointer.
4 - New TLS area pointer.
5 - Child tid pointer. */
#define ARCH_FORK() \
INLINE_SYSCALL (clone, 5, \
CLONE_CHILD_SETTID | CLONE_CHILD_CLEARTID | SIGCHLD, \
NULL, NULL, NULL, &THREAD_SELF->tid)

3
sysdeps/unix/sysv/linux/hppa/kernel-features.h
View File

@ -32,3 +32,6 @@
#if __LINUX_KERNEL_VERSION < 0x040000
# undef __ASSUME_EXECVEAT
#endif
#undef __ASSUME_CLONE_DEFAULT
#define __ASSUME_CLONE_BACKWARDS 1

27
sysdeps/unix/sysv/linux/i386/arch-fork.h
View File

@ -1,27 +0,0 @@
/* Internal definitions for thread-friendly fork implementation. Linux/i386.
Copyright (C) 2002-2018 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
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 <sched.h>
#include <sysdep.h>
#include <tls.h>
#define ARCH_FORK() \
INLINE_SYSCALL (clone, 5, \
CLONE_CHILD_SETTID | CLONE_CHILD_CLEARTID | SIGCHLD, 0, \
NULL, NULL, &THREAD_SELF->tid)

3
sysdeps/unix/sysv/linux/i386/kernel-features.h
View File

@ -48,3 +48,6 @@
/* i686 only supports ipc syscall. */
#undef __ASSUME_DIRECT_SYSVIPC_SYSCALLS
#undef __ASSUME_CLONE_DEFAULT
#define __ASSUME_CLONE_BACKWARDS 1

31
sysdeps/unix/sysv/linux/ia64/arch-fork.h
View File

@ -1,31 +0,0 @@
/* ARCH_FORK definition for Linux fork implementation. IA64 version.
Copyright (C) 2003-2018 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Jakub Jelinek <jakub@redhat.com>, 2003.
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 <sched.h>
#include <signal.h>
#include <sysdep.h>
#include <tls.h>
#define ARCH_FORK() \
INLINE_SYSCALL (clone2, 6, \
CLONE_CHILD_SETTID | CLONE_CHILD_CLEARTID | SIGCHLD, \
NULL, 0, NULL, &THREAD_SELF->tid, NULL)
#define ARCH_CLONE __clone2

3
sysdeps/unix/sysv/linux/ia64/kernel-features.h
View File

@ -26,4 +26,7 @@
#define __ASSUME_SEND_SYSCALL 1
#define __ASSUME_ACCEPT4_SYSCALL 1
#undef __ASSUME_CLONE_DEFAULT
#define __ASSUME_CLONE2
#endif /* _KERNEL_FEATURES_H */

35
sysdeps/unix/sysv/linux/kernel-features.h
View File

@ -115,3 +115,38 @@
#if __LINUX_KERNEL_VERSION >= 0x040500
# define __ASSUME_COPY_FILE_RANGE 1
#endif
/* Support for clone call used on fork. The signature varies across the
architectures with current 4 different variants:
1. long int clone (unsigned long flags, unsigned long newsp,
int *parent_tidptr, unsigned long tls,
int *child_tidptr)
2. long int clone (unsigned long newsp, unsigned long clone_flags,
int *parent_tidptr, int * child_tidptr,
unsigned long tls)
3. long int clone (unsigned long flags, unsigned long newsp,
int stack_size, int *parent_tidptr,
int *child_tidptr, unsigned long tls)
4. long int clone (unsigned long flags, unsigned long newsp,
int *parent_tidptr, int *child_tidptr,
unsigned long tls)
The fourth variant is intended to be used as the default for newer ports,
Also IA64 uses the third variant but with __NR_clone2 instead of
__NR_clone.
The macros names to define the variant used for the architecture is
similar to kernel:
- __ASSUME_CLONE_BACKWARDS: for variant 1.
- __ASSUME_CLONE_BACKWARDS2: for variant 2 (s390).
- __ASSUME_CLONE_BACKWARDS3: for variant 3 (microblaze).
- __ASSUME_CLONE_DEFAULT: for variant 4.
- __ASSUME_CLONE2: for clone2 with variant 3 (ia64).
*/
#define __ASSUME_CLONE_DEFAULT 1

28
sysdeps/unix/sysv/linux/m68k/arch-fork.h
View File

@ -1,28 +0,0 @@
/* ARCH_FORK definition for Linux fork implementation. m68k version.
Copyright (C) 2010-2018 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Maxim Kuvyrkov <maxim@codesourcery.com>, 2010.
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 <sched.h>
#include <signal.h>
#include <sysdep.h>
#include <tls.h>
#define ARCH_FORK() \
INLINE_SYSCALL (clone, 5, \
CLONE_CHILD_SETTID | CLONE_CHILD_CLEARTID | SIGCHLD, 0, \
NULL, &THREAD_SELF->tid, NULL)

27
sysdeps/unix/sysv/linux/microblaze/arch-fork.h
View File

@ -1,27 +0,0 @@
/* ARCH_FORK definition for Linux fork implementation. MicroBlaze version.
Copyright (C) 2014-2018 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/>. */
#include <sched.h>
#include <signal.h>
#include <sysdep.h>
#include <tls.h>
#define ARCH_FORK() \
INLINE_SYSCALL (clone, 5, \
CLONE_CHILD_SETTID | CLONE_CHILD_CLEARTID | SIGCHLD, 0, \
NULL, NULL, &THREAD_SELF->tid)

3
sysdeps/unix/sysv/linux/microblaze/kernel-features.h
View File

@ -57,3 +57,6 @@
#if __LINUX_KERNEL_VERSION < 0x040A00
# undef __ASSUME_COPY_FILE_RANGE
#endif
#undef __ASSUME_CLONE_DEFAULT
#define __ASSUME_CLONE_BACKWARDS3

1
sysdeps/unix/sysv/linux/mips/arch-fork.h
View File

@ -1 +0,0 @@
#include <sysdeps/unix/sysv/linux/i386/arch-fork.h>

3
sysdeps/unix/sysv/linux/mips/kernel-features.h
View File

@ -47,3 +47,6 @@
#if _MIPS_SIM == _ABIN32
# define __ASSUME_WORDSIZE64_ILP32 1
#endif
#undef __ASSUME_CLONE_DEFAULT
#define __ASSUME_CLONE_BACKWARDS 1

33
sysdeps/unix/sysv/linux/nios2/arch-fork.h
View File

@ -1,33 +0,0 @@
/* ARCH_FORK definition for Linux fork implementation. Nios II version.
Copyright (C) 2005-2018 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/>. */
#include <sched.h>
#include <signal.h>
#include <sysdep.h>
#include <tls.h>
/* Argument 1 - Clone flags.
2 - Child stack pointer.
3 - Parent tid pointer.
4 - Child tid pointer.
5 - New TLS area pointer. */
#define ARCH_FORK() \
INLINE_SYSCALL (clone, 5, \
CLONE_CHILD_SETTID | CLONE_CHILD_CLEARTID | SIGCHLD, \
NULL, NULL, &THREAD_SELF->tid, NULL)

1
sysdeps/unix/sysv/linux/powerpc/arch-fork.h
View File

@ -1 +0,0 @@
#include <sysdeps/unix/sysv/linux/i386/arch-fork.h>

3
sysdeps/unix/sysv/linux/powerpc/kernel-features.h
View File

@ -49,3 +49,6 @@
/* powerpc only supports ipc syscall. */
#undef __ASSUME_DIRECT_SYSVIPC_SYSCALLS
#undef __ASSUME_CLONE_DEFAULT
#define __ASSUME_CLONE_BACKWARDS 1

17
sysdeps/unix/sysv/linux/aarch64/arch-fork.h → sysdeps/unix/sysv/linux/riscv/kernel-features.h
View File

@ -1,5 +1,6 @@
/* ARCH_FORK definition for Linux fork implementation. AArch64 version.
Copyright (C) 2005-2018 Free Software Foundation, Inc.
/* Set flags signalling availability of kernel features based on given
kernel version number. RISC-V version.
Copyright (C) 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
@ -16,13 +17,7 @@
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#include <sched.h>
#include <signal.h>
#include <sysdep.h>
#include <tls.h>
#include_next <kernel-features.h>
#define ARCH_FORK() \
INLINE_SYSCALL (clone, 5, \
CLONE_CHILD_SETTID | CLONE_CHILD_CLEARTID | SIGCHLD, \
NULL, NULL, NULL, &THREAD_SELF->tid)
#undef __ASSUME_CLONE_DEFAULT
#define __ASSUME_CLONE_BACKWARDS 1

29
sysdeps/unix/sysv/linux/s390/arch-fork.h
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@ -1,29 +0,0 @@
/* ARCH_FORK definition for Linux fork implementation. S390 version.
Copyright (C) 2003-2018 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Martin Schwidefsky <schwidefsky@de.ibm.com>, 2003.
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 <sched.h>
#include <signal.h>
#include <sysdep.h>
#include <tls.h>
#define ARCH_FORK() \
INLINE_SYSCALL (clone, 5, \
0, CLONE_CHILD_SETTID | CLONE_CHILD_CLEARTID | SIGCHLD, \
NULL, &THREAD_SELF->tid, NULL)

3
sysdeps/unix/sysv/linux/s390/kernel-features.h
View File

@ -50,3 +50,6 @@
/* s390 only supports ipc syscall. */
#undef __ASSUME_DIRECT_SYSVIPC_SYSCALLS
#undef __ASSUME_CLONE_DEFAULT
#define __ASSUME_CLONE_BACKWARDS2

28
sysdeps/unix/sysv/linux/sh/arch-fork.h
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@ -1,28 +0,0 @@
/* ARCH_FORK definition for Linux fork implementation. SH version.
Copyright (C) 2003-2018 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/>. */
#include <sched.h>
#include <signal.h>
#include <sysdep.h>
#include <tls.h>
/* TLS pointer argument is passed as the 5-th argument. */
#define ARCH_FORK() \
INLINE_SYSCALL (clone, 5, \
CLONE_CHILD_SETTID | CLONE_CHILD_CLEARTID | SIGCHLD, 0, \
NULL, &THREAD_SELF->tid, NULL)

27
sysdeps/unix/sysv/linux/sparc/arch-fork.h
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@ -1,27 +0,0 @@
/* ARCH_FORK definition for Linux fork implementation. SPARC version.
Copyright (C) 2003-2018 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Jakub Jelinek <jakub@redhat.com>, 2003.
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 <sched.h>
#include <signal.h>
#include <sysdep.h>
#include <tls.h>
#define ARCH_FORK() \
INLINE_CLONE_SYSCALL (CLONE_CHILD_SETTID | CLONE_CHILD_CLEARTID | SIGCHLD, \
0, NULL, NULL, &THREAD_SELF->tid)

29
sysdeps/unix/sysv/linux/tile/arch-fork.h
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@ -1,29 +0,0 @@
/* ARCH_FORK definition for Linux fork implementation. Tile* version.
Copyright (C) 2011-2018 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Chris Metcalf <cmetcalf@tilera.com>, 2011.
Based on work contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
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 <sched.h>
#include <signal.h>
#include <sysdep.h>
#include <tls.h>
#define ARCH_FORK() \
INLINE_SYSCALL (clone, 4, \
CLONE_CHILD_SETTID | CLONE_CHILD_CLEARTID | SIGCHLD, \
0, NULL, &THREAD_SELF->tid)

27
sysdeps/unix/sysv/linux/x86_64/arch-fork.h
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@ -1,27 +0,0 @@
/* Internal definitions for thread-friendly fork implementation. Linux/x86_64.
Copyright (C) 2003-2018 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@redhat.com>, 2003.
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 <sched.h>
#include <sysdep.h>
#include <tls.h>
#define ARCH_FORK() \
INLINE_SYSCALL (clone, 4, \
CLONE_CHILD_SETTID | CLONE_CHILD_CLEARTID | SIGCHLD, 0, \
NULL, &THREAD_SELF->tid)