glibc/sysdeps/unix/sysv/linux/arm/clone.S

84 lines
2.1 KiB
ArmAsm
Raw Normal View History

/* Copyright (C) 1996-2021 Free Software Foundation, Inc.
1997-05-21 01:44:03 +00:00
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
2001-07-06 04:56:23 +00:00
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.
1997-05-21 01:44:03 +00:00
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
2001-07-06 04:56:23 +00:00
Lesser General Public License for more details.
1997-05-21 01:44:03 +00:00
2001-07-06 04:56:23 +00:00
You should have received a copy of the GNU Lesser General Public
2012-03-09 23:56:38 +00:00
License along with the GNU C Library. If not, see
Prefer https to http for gnu.org and fsf.org URLs 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
2019-09-07 05:40:42 +00:00
<https://www.gnu.org/licenses/>. */
1997-05-21 01:44:03 +00:00
/* 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>
#include <tcb-offsets.h>
1997-05-21 01:44:03 +00:00
#define _ERRNO_H 1
1997-06-21 01:37:20 +00:00
#include <bits/errno.h>
1997-05-21 01:44:03 +00:00
* sysdeps/arm/bits/setjmp.h, sysdeps/arm/fpu/bits/setjmp.h: Update include guards. * sysdeps/unix/arm/sysdep.S (syscall_error): Handle USE___THREAD and RTLD_PRIVATE_ERRNO. * sysdeps/unix/sysv/linux/arm/clone.S (__clone): Handle RESET_PID. Handle new arguments. * sysdeps/unix/sysv/linux/arm/vfork.S (__vfork): Use SAVE_PID and RESTORE_PID. Use the right syscall error handler. * sysdeps/unix/sysv/linux/arm/eabi/sigrestorer.S (__default_sa_restorer, __default_rt_sa_restorer): Add unwind information. * sysdeps/unix/sysv/linux/arm/eabi/socket.S: Update formatting. Add unwind information. Correct stack alignment typo. * sysdeps/unix/sysv/linux/arm/eabi/sysdep.h (INTERNAL_SYSCALL_NCS): Define. * sysdeps/unix/sysv/linux/arm/sigaction.c (__libc_sigaction): Remove never-valid handling for SA_ONSTACK. * sysdeps/unix/sysv/linux/arm/socket.S: Whitespace cleanup. * sysdeps/unix/sysv/linux/arm/sysdep.h (SYSCALL_ERROR_HANDLER): Handle RTLD_PRIVATE_ERRNO. (INTERNAL_SYSCALL_NCS): Implement. * sysdeps/arm/nptl/Makefile, sysdeps/arm/nptl/jmpbuf-unwind.h, sysdeps/arm/nptl/pthread_spin_lock.S, sysdeps/arm/nptl/pthread_spin_trylock.S, sysdeps/arm/nptl/pthreaddef.h, sysdeps/arm/nptl/tcb-offsets.sym, sysdeps/arm/nptl/tls.h, sysdeps/unix/sysv/linux/arm/eabi/Makefile, sysdeps/unix/sysv/linux/arm/eabi/nptl/Makefile, sysdeps/unix/sysv/linux/arm/eabi/nptl/configure, sysdeps/unix/sysv/linux/arm/eabi/nptl/configure.in, sysdeps/unix/sysv/linux/arm/eabi/nptl/nptl-aeabi_unwind_cpp_pr1.c, sysdeps/unix/sysv/linux/arm/eabi/nptl/rt-aeabi_unwind_cpp_pr1.c, sysdeps/unix/sysv/linux/arm/eabi/nptl/sysdep-cancel.h, sysdeps/unix/sysv/linux/arm/eabi/nptl/unwind-forcedunwind.c, sysdeps/unix/sysv/linux/arm/eabi/nptl/unwind-resume.c, sysdeps/unix/sysv/linux/arm/eabi/nptl/unwind.h, sysdeps/unix/sysv/linux/arm/nptl/Versions, sysdeps/unix/sysv/linux/arm/nptl/bits/atomic.h, sysdeps/unix/sysv/linux/arm/nptl/bits/pthreadtypes.h, sysdeps/unix/sysv/linux/arm/nptl/clone.S, sysdeps/unix/sysv/linux/arm/nptl/createthread.c, sysdeps/unix/sysv/linux/arm/nptl/fork.c, sysdeps/unix/sysv/linux/arm/nptl/lowlevellock.c, sysdeps/unix/sysv/linux/arm/nptl/lowlevellock.h, sysdeps/unix/sysv/linux/arm/nptl/pt-vfork.S, sysdeps/unix/sysv/linux/arm/nptl/pthread_once.c, sysdeps/unix/sysv/linux/arm/nptl/vfork.S: New files.
2005-11-16 19:03:42 +00:00
/* int clone(int (*fn)(void *arg), void *child_stack, int flags, void *arg,
pid_t *ptid, struct user_desc *tls, pid_t *ctid); */
1997-05-21 01:44:03 +00:00
.text
ENTRY(__clone)
1998-07-27 17:54:21 +00:00
@ sanity check args
cmp r0, #0
@ align sp
and r1, r1, #-8
ite ne
1998-07-27 17:54:21 +00:00
cmpne r1, #0
moveq r0, #-EINVAL
beq PLTJMP(syscall_error)
@ insert the args onto the new stack
2002-12-21 18:36:55 +00:00
str r3, [r1, #-4]!
str r0, [r1, #-4]!
1998-07-27 17:54:21 +00:00
@ do the system call
1999-01-25 09:27:19 +00:00
@ get flags
1998-07-27 17:54:21 +00:00
mov r0, r2
* sysdeps/arm/bits/setjmp.h, sysdeps/arm/fpu/bits/setjmp.h: Update include guards. * sysdeps/unix/arm/sysdep.S (syscall_error): Handle USE___THREAD and RTLD_PRIVATE_ERRNO. * sysdeps/unix/sysv/linux/arm/clone.S (__clone): Handle RESET_PID. Handle new arguments. * sysdeps/unix/sysv/linux/arm/vfork.S (__vfork): Use SAVE_PID and RESTORE_PID. Use the right syscall error handler. * sysdeps/unix/sysv/linux/arm/eabi/sigrestorer.S (__default_sa_restorer, __default_rt_sa_restorer): Add unwind information. * sysdeps/unix/sysv/linux/arm/eabi/socket.S: Update formatting. Add unwind information. Correct stack alignment typo. * sysdeps/unix/sysv/linux/arm/eabi/sysdep.h (INTERNAL_SYSCALL_NCS): Define. * sysdeps/unix/sysv/linux/arm/sigaction.c (__libc_sigaction): Remove never-valid handling for SA_ONSTACK. * sysdeps/unix/sysv/linux/arm/socket.S: Whitespace cleanup. * sysdeps/unix/sysv/linux/arm/sysdep.h (SYSCALL_ERROR_HANDLER): Handle RTLD_PRIVATE_ERRNO. (INTERNAL_SYSCALL_NCS): Implement. * sysdeps/arm/nptl/Makefile, sysdeps/arm/nptl/jmpbuf-unwind.h, sysdeps/arm/nptl/pthread_spin_lock.S, sysdeps/arm/nptl/pthread_spin_trylock.S, sysdeps/arm/nptl/pthreaddef.h, sysdeps/arm/nptl/tcb-offsets.sym, sysdeps/arm/nptl/tls.h, sysdeps/unix/sysv/linux/arm/eabi/Makefile, sysdeps/unix/sysv/linux/arm/eabi/nptl/Makefile, sysdeps/unix/sysv/linux/arm/eabi/nptl/configure, sysdeps/unix/sysv/linux/arm/eabi/nptl/configure.in, sysdeps/unix/sysv/linux/arm/eabi/nptl/nptl-aeabi_unwind_cpp_pr1.c, sysdeps/unix/sysv/linux/arm/eabi/nptl/rt-aeabi_unwind_cpp_pr1.c, sysdeps/unix/sysv/linux/arm/eabi/nptl/sysdep-cancel.h, sysdeps/unix/sysv/linux/arm/eabi/nptl/unwind-forcedunwind.c, sysdeps/unix/sysv/linux/arm/eabi/nptl/unwind-resume.c, sysdeps/unix/sysv/linux/arm/eabi/nptl/unwind.h, sysdeps/unix/sysv/linux/arm/nptl/Versions, sysdeps/unix/sysv/linux/arm/nptl/bits/atomic.h, sysdeps/unix/sysv/linux/arm/nptl/bits/pthreadtypes.h, sysdeps/unix/sysv/linux/arm/nptl/clone.S, sysdeps/unix/sysv/linux/arm/nptl/createthread.c, sysdeps/unix/sysv/linux/arm/nptl/fork.c, sysdeps/unix/sysv/linux/arm/nptl/lowlevellock.c, sysdeps/unix/sysv/linux/arm/nptl/lowlevellock.h, sysdeps/unix/sysv/linux/arm/nptl/pt-vfork.S, sysdeps/unix/sysv/linux/arm/nptl/pthread_once.c, sysdeps/unix/sysv/linux/arm/nptl/vfork.S: New files.
2005-11-16 19:03:42 +00:00
mov ip, r2
1998-07-27 17:54:21 +00:00
@ new sp is already in r1
push {r4, r7}
cfi_adjust_cfa_offset (8)
cfi_rel_offset (r4, 0)
cfi_rel_offset (r7, 4)
* sysdeps/arm/bits/setjmp.h, sysdeps/arm/fpu/bits/setjmp.h: Update include guards. * sysdeps/unix/arm/sysdep.S (syscall_error): Handle USE___THREAD and RTLD_PRIVATE_ERRNO. * sysdeps/unix/sysv/linux/arm/clone.S (__clone): Handle RESET_PID. Handle new arguments. * sysdeps/unix/sysv/linux/arm/vfork.S (__vfork): Use SAVE_PID and RESTORE_PID. Use the right syscall error handler. * sysdeps/unix/sysv/linux/arm/eabi/sigrestorer.S (__default_sa_restorer, __default_rt_sa_restorer): Add unwind information. * sysdeps/unix/sysv/linux/arm/eabi/socket.S: Update formatting. Add unwind information. Correct stack alignment typo. * sysdeps/unix/sysv/linux/arm/eabi/sysdep.h (INTERNAL_SYSCALL_NCS): Define. * sysdeps/unix/sysv/linux/arm/sigaction.c (__libc_sigaction): Remove never-valid handling for SA_ONSTACK. * sysdeps/unix/sysv/linux/arm/socket.S: Whitespace cleanup. * sysdeps/unix/sysv/linux/arm/sysdep.h (SYSCALL_ERROR_HANDLER): Handle RTLD_PRIVATE_ERRNO. (INTERNAL_SYSCALL_NCS): Implement. * sysdeps/arm/nptl/Makefile, sysdeps/arm/nptl/jmpbuf-unwind.h, sysdeps/arm/nptl/pthread_spin_lock.S, sysdeps/arm/nptl/pthread_spin_trylock.S, sysdeps/arm/nptl/pthreaddef.h, sysdeps/arm/nptl/tcb-offsets.sym, sysdeps/arm/nptl/tls.h, sysdeps/unix/sysv/linux/arm/eabi/Makefile, sysdeps/unix/sysv/linux/arm/eabi/nptl/Makefile, sysdeps/unix/sysv/linux/arm/eabi/nptl/configure, sysdeps/unix/sysv/linux/arm/eabi/nptl/configure.in, sysdeps/unix/sysv/linux/arm/eabi/nptl/nptl-aeabi_unwind_cpp_pr1.c, sysdeps/unix/sysv/linux/arm/eabi/nptl/rt-aeabi_unwind_cpp_pr1.c, sysdeps/unix/sysv/linux/arm/eabi/nptl/sysdep-cancel.h, sysdeps/unix/sysv/linux/arm/eabi/nptl/unwind-forcedunwind.c, sysdeps/unix/sysv/linux/arm/eabi/nptl/unwind-resume.c, sysdeps/unix/sysv/linux/arm/eabi/nptl/unwind.h, sysdeps/unix/sysv/linux/arm/nptl/Versions, sysdeps/unix/sysv/linux/arm/nptl/bits/atomic.h, sysdeps/unix/sysv/linux/arm/nptl/bits/pthreadtypes.h, sysdeps/unix/sysv/linux/arm/nptl/clone.S, sysdeps/unix/sysv/linux/arm/nptl/createthread.c, sysdeps/unix/sysv/linux/arm/nptl/fork.c, sysdeps/unix/sysv/linux/arm/nptl/lowlevellock.c, sysdeps/unix/sysv/linux/arm/nptl/lowlevellock.h, sysdeps/unix/sysv/linux/arm/nptl/pt-vfork.S, sysdeps/unix/sysv/linux/arm/nptl/pthread_once.c, sysdeps/unix/sysv/linux/arm/nptl/vfork.S: New files.
2005-11-16 19:03:42 +00:00
ldr r2, [sp, #8]
ldr r3, [sp, #12]
ldr r4, [sp, #16]
ldr r7, =SYS_ify(clone)
swi 0x0
cfi_endproc
* sysdeps/arm/bits/setjmp.h, sysdeps/arm/fpu/bits/setjmp.h: Update include guards. * sysdeps/unix/arm/sysdep.S (syscall_error): Handle USE___THREAD and RTLD_PRIVATE_ERRNO. * sysdeps/unix/sysv/linux/arm/clone.S (__clone): Handle RESET_PID. Handle new arguments. * sysdeps/unix/sysv/linux/arm/vfork.S (__vfork): Use SAVE_PID and RESTORE_PID. Use the right syscall error handler. * sysdeps/unix/sysv/linux/arm/eabi/sigrestorer.S (__default_sa_restorer, __default_rt_sa_restorer): Add unwind information. * sysdeps/unix/sysv/linux/arm/eabi/socket.S: Update formatting. Add unwind information. Correct stack alignment typo. * sysdeps/unix/sysv/linux/arm/eabi/sysdep.h (INTERNAL_SYSCALL_NCS): Define. * sysdeps/unix/sysv/linux/arm/sigaction.c (__libc_sigaction): Remove never-valid handling for SA_ONSTACK. * sysdeps/unix/sysv/linux/arm/socket.S: Whitespace cleanup. * sysdeps/unix/sysv/linux/arm/sysdep.h (SYSCALL_ERROR_HANDLER): Handle RTLD_PRIVATE_ERRNO. (INTERNAL_SYSCALL_NCS): Implement. * sysdeps/arm/nptl/Makefile, sysdeps/arm/nptl/jmpbuf-unwind.h, sysdeps/arm/nptl/pthread_spin_lock.S, sysdeps/arm/nptl/pthread_spin_trylock.S, sysdeps/arm/nptl/pthreaddef.h, sysdeps/arm/nptl/tcb-offsets.sym, sysdeps/arm/nptl/tls.h, sysdeps/unix/sysv/linux/arm/eabi/Makefile, sysdeps/unix/sysv/linux/arm/eabi/nptl/Makefile, sysdeps/unix/sysv/linux/arm/eabi/nptl/configure, sysdeps/unix/sysv/linux/arm/eabi/nptl/configure.in, sysdeps/unix/sysv/linux/arm/eabi/nptl/nptl-aeabi_unwind_cpp_pr1.c, sysdeps/unix/sysv/linux/arm/eabi/nptl/rt-aeabi_unwind_cpp_pr1.c, sysdeps/unix/sysv/linux/arm/eabi/nptl/sysdep-cancel.h, sysdeps/unix/sysv/linux/arm/eabi/nptl/unwind-forcedunwind.c, sysdeps/unix/sysv/linux/arm/eabi/nptl/unwind-resume.c, sysdeps/unix/sysv/linux/arm/eabi/nptl/unwind.h, sysdeps/unix/sysv/linux/arm/nptl/Versions, sysdeps/unix/sysv/linux/arm/nptl/bits/atomic.h, sysdeps/unix/sysv/linux/arm/nptl/bits/pthreadtypes.h, sysdeps/unix/sysv/linux/arm/nptl/clone.S, sysdeps/unix/sysv/linux/arm/nptl/createthread.c, sysdeps/unix/sysv/linux/arm/nptl/fork.c, sysdeps/unix/sysv/linux/arm/nptl/lowlevellock.c, sysdeps/unix/sysv/linux/arm/nptl/lowlevellock.h, sysdeps/unix/sysv/linux/arm/nptl/pt-vfork.S, sysdeps/unix/sysv/linux/arm/nptl/pthread_once.c, sysdeps/unix/sysv/linux/arm/nptl/vfork.S: New files.
2005-11-16 19:03:42 +00:00
cmp r0, #0
beq 1f
pop {r4, r7}
1999-01-25 09:27:19 +00:00
blt PLTJMP(C_SYMBOL_NAME(__syscall_error))
* sysdeps/arm/bits/setjmp.h, sysdeps/arm/fpu/bits/setjmp.h: Update include guards. * sysdeps/unix/arm/sysdep.S (syscall_error): Handle USE___THREAD and RTLD_PRIVATE_ERRNO. * sysdeps/unix/sysv/linux/arm/clone.S (__clone): Handle RESET_PID. Handle new arguments. * sysdeps/unix/sysv/linux/arm/vfork.S (__vfork): Use SAVE_PID and RESTORE_PID. Use the right syscall error handler. * sysdeps/unix/sysv/linux/arm/eabi/sigrestorer.S (__default_sa_restorer, __default_rt_sa_restorer): Add unwind information. * sysdeps/unix/sysv/linux/arm/eabi/socket.S: Update formatting. Add unwind information. Correct stack alignment typo. * sysdeps/unix/sysv/linux/arm/eabi/sysdep.h (INTERNAL_SYSCALL_NCS): Define. * sysdeps/unix/sysv/linux/arm/sigaction.c (__libc_sigaction): Remove never-valid handling for SA_ONSTACK. * sysdeps/unix/sysv/linux/arm/socket.S: Whitespace cleanup. * sysdeps/unix/sysv/linux/arm/sysdep.h (SYSCALL_ERROR_HANDLER): Handle RTLD_PRIVATE_ERRNO. (INTERNAL_SYSCALL_NCS): Implement. * sysdeps/arm/nptl/Makefile, sysdeps/arm/nptl/jmpbuf-unwind.h, sysdeps/arm/nptl/pthread_spin_lock.S, sysdeps/arm/nptl/pthread_spin_trylock.S, sysdeps/arm/nptl/pthreaddef.h, sysdeps/arm/nptl/tcb-offsets.sym, sysdeps/arm/nptl/tls.h, sysdeps/unix/sysv/linux/arm/eabi/Makefile, sysdeps/unix/sysv/linux/arm/eabi/nptl/Makefile, sysdeps/unix/sysv/linux/arm/eabi/nptl/configure, sysdeps/unix/sysv/linux/arm/eabi/nptl/configure.in, sysdeps/unix/sysv/linux/arm/eabi/nptl/nptl-aeabi_unwind_cpp_pr1.c, sysdeps/unix/sysv/linux/arm/eabi/nptl/rt-aeabi_unwind_cpp_pr1.c, sysdeps/unix/sysv/linux/arm/eabi/nptl/sysdep-cancel.h, sysdeps/unix/sysv/linux/arm/eabi/nptl/unwind-forcedunwind.c, sysdeps/unix/sysv/linux/arm/eabi/nptl/unwind-resume.c, sysdeps/unix/sysv/linux/arm/eabi/nptl/unwind.h, sysdeps/unix/sysv/linux/arm/nptl/Versions, sysdeps/unix/sysv/linux/arm/nptl/bits/atomic.h, sysdeps/unix/sysv/linux/arm/nptl/bits/pthreadtypes.h, sysdeps/unix/sysv/linux/arm/nptl/clone.S, sysdeps/unix/sysv/linux/arm/nptl/createthread.c, sysdeps/unix/sysv/linux/arm/nptl/fork.c, sysdeps/unix/sysv/linux/arm/nptl/lowlevellock.c, sysdeps/unix/sysv/linux/arm/nptl/lowlevellock.h, sysdeps/unix/sysv/linux/arm/nptl/pt-vfork.S, sysdeps/unix/sysv/linux/arm/nptl/pthread_once.c, sysdeps/unix/sysv/linux/arm/nptl/vfork.S: New files.
2005-11-16 19:03:42 +00:00
RETINSTR(, lr)
1998-07-27 17:54:21 +00:00
cfi_startproc
2011-08-02 15:32:10 +00:00
PSEUDO_END (__clone)
* sysdeps/arm/bits/setjmp.h, sysdeps/arm/fpu/bits/setjmp.h: Update include guards. * sysdeps/unix/arm/sysdep.S (syscall_error): Handle USE___THREAD and RTLD_PRIVATE_ERRNO. * sysdeps/unix/sysv/linux/arm/clone.S (__clone): Handle RESET_PID. Handle new arguments. * sysdeps/unix/sysv/linux/arm/vfork.S (__vfork): Use SAVE_PID and RESTORE_PID. Use the right syscall error handler. * sysdeps/unix/sysv/linux/arm/eabi/sigrestorer.S (__default_sa_restorer, __default_rt_sa_restorer): Add unwind information. * sysdeps/unix/sysv/linux/arm/eabi/socket.S: Update formatting. Add unwind information. Correct stack alignment typo. * sysdeps/unix/sysv/linux/arm/eabi/sysdep.h (INTERNAL_SYSCALL_NCS): Define. * sysdeps/unix/sysv/linux/arm/sigaction.c (__libc_sigaction): Remove never-valid handling for SA_ONSTACK. * sysdeps/unix/sysv/linux/arm/socket.S: Whitespace cleanup. * sysdeps/unix/sysv/linux/arm/sysdep.h (SYSCALL_ERROR_HANDLER): Handle RTLD_PRIVATE_ERRNO. (INTERNAL_SYSCALL_NCS): Implement. * sysdeps/arm/nptl/Makefile, sysdeps/arm/nptl/jmpbuf-unwind.h, sysdeps/arm/nptl/pthread_spin_lock.S, sysdeps/arm/nptl/pthread_spin_trylock.S, sysdeps/arm/nptl/pthreaddef.h, sysdeps/arm/nptl/tcb-offsets.sym, sysdeps/arm/nptl/tls.h, sysdeps/unix/sysv/linux/arm/eabi/Makefile, sysdeps/unix/sysv/linux/arm/eabi/nptl/Makefile, sysdeps/unix/sysv/linux/arm/eabi/nptl/configure, sysdeps/unix/sysv/linux/arm/eabi/nptl/configure.in, sysdeps/unix/sysv/linux/arm/eabi/nptl/nptl-aeabi_unwind_cpp_pr1.c, sysdeps/unix/sysv/linux/arm/eabi/nptl/rt-aeabi_unwind_cpp_pr1.c, sysdeps/unix/sysv/linux/arm/eabi/nptl/sysdep-cancel.h, sysdeps/unix/sysv/linux/arm/eabi/nptl/unwind-forcedunwind.c, sysdeps/unix/sysv/linux/arm/eabi/nptl/unwind-resume.c, sysdeps/unix/sysv/linux/arm/eabi/nptl/unwind.h, sysdeps/unix/sysv/linux/arm/nptl/Versions, sysdeps/unix/sysv/linux/arm/nptl/bits/atomic.h, sysdeps/unix/sysv/linux/arm/nptl/bits/pthreadtypes.h, sysdeps/unix/sysv/linux/arm/nptl/clone.S, sysdeps/unix/sysv/linux/arm/nptl/createthread.c, sysdeps/unix/sysv/linux/arm/nptl/fork.c, sysdeps/unix/sysv/linux/arm/nptl/lowlevellock.c, sysdeps/unix/sysv/linux/arm/nptl/lowlevellock.h, sysdeps/unix/sysv/linux/arm/nptl/pt-vfork.S, sysdeps/unix/sysv/linux/arm/nptl/pthread_once.c, sysdeps/unix/sysv/linux/arm/nptl/vfork.S: New files.
2005-11-16 19:03:42 +00:00
1:
2011-08-02 15:32:10 +00:00
.fnstart
.cantunwind
1998-07-27 17:54:21 +00:00
@ pick the function arg and call address off the stack and execute
ldr r0, [sp, #4]
ldr ip, [sp], #8
BLX (ip)
1998-07-27 17:54:21 +00:00
@ and we are done, passing the return value through r0
Call exit directly in clone (BZ #21512) On aarch64, alpha, arm, hppa, mips, nios2, powerpc, sh, sparc, tile, and x86_64 the clone syscall jumps to _exit after the child execution and the function ends the process execution by calling exit_group. This behavior have a small issue where threads created with CLONE_THREAD using clone syscall directly will eventually exit the whole group altogether instead of just the thread created. Also, s390, microblaze, ia64, i386, and m68k differs by calling exit syscall directly. This patch changes all architectures to call the exit syscall directly, as for s390, microblaze, ia64, i386, and m68k. This do not have change glibc internal behavior in any sort, since the only usage of clone implementation in posix_spawn calls _exit directly in the created child (fork uses a direct call to clone). Checked on x86_64-linux-gnu, i686-linux-gnu, aarch64-linux-gnu, powerpc-linux-gnu, powerpc64le-linux-gnu, sparc64-linux-gnu, and sparcv9-linux-gnu. [BZ #21512] * sysdeps/unix/sysv/linux/aarch64/clone.S (__clone): Call exit syscall instead of jump to _exit. (CLONE_VM_BIT): Remove unused define. (CLONE_VM): Likewise. (CLONE_THREAD_BIT): Likewise. (CLONE_THREAD): Likewise. * sysdeps/unix/sysv/linux/alpha/clone.S (__clone): Likewise. (CLONE_VM): Remove unused define. * sysdeps/unix/sysv/linux/arm/clone.S (__clone): Likewise. (CLONE_VM): Remove unused define. (CLONE_THREAD): Likewise. * sysdeps/unix/sysv/linux/i386/clone.S (CLONE_VM): Likewise. * sysdeps/unix/sysv/linux/ia64/clone2.S (__clone2): Call exit syscall instead of jump to _exit. * sysdeps/unix/sysv/linux/hppa/clone.S (__clone): Likewise. * sysdeps/unix/sysv/linux/mips/clone.S (__clone): Likewise. (CLONE_VM): Remove unused define. (CLONE_THREAD): Likewise. * sysdeps/unix/sysv/linux/nios2/clone.S (__clone): Likewise. (CLONE_VM): Remove unused define. * sysdeps/unix/sysv/linux/powerpc/powerpc32/clone.S (__clone): Likewise. (CLONE_VM): Remove unused define. (CLONE_THREAD): Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc64/clone.S (__clone): Likewise. (CLONE_VM): Remove unused define. (CLONE_THREAD): Likewise. * sysdeps/unix/sysv/linux/sh/clone.S (__clone): Likewise. * sysdeps/unix/sysv/linux/sparc/sparc32/clone.S (__clone): Likewise. (CLONE_VM): Remove unused define. * sysdeps/unix/sysv/linux/sparc/sparc64/clone.S (__clone): Likewise. (CLONE_VM): Remove unused define. * sysdeps/unix/sysv/linux/tile/clone.S (__clone): Likewise. * sysdeps/unix/sysv/linux/x86_64/clone.S (__clone): Likewise. (CLONE_VM): Remove unused define. * sysdeps/unix/sysv/linux/Makefile (tests): Add tst-clone3. * sysdeps/unix/sysv/linux/tst-clone3.c: New file. Fix
2017-06-22 11:49:34 +00:00
ldr r7, =SYS_ify(exit)
swi 0x0
1998-07-27 17:54:21 +00:00
2011-08-02 15:32:10 +00:00
.fnend
1997-05-21 01:44:03 +00:00
posix: New Linux posix_spawn{p} implementation This patch implements a new posix_spawn{p} implementation for Linux. The main difference is it uses the clone syscall directly with CLONE_VM and CLONE_VFORK flags and a direct allocated stack. The new stack and start function solves most the vfork limitation (possible parent clobber due stack spilling). The remaning issue are related to signal handling: 1. That no signal handlers must run in child context, to avoid corrupt parent's state. 2. Child must synchronize with parent to enforce stack deallocation and to possible return execv issues. The first one is solved by blocking all signals in child, even NPTL-internal ones (SIGCANCEL and SIGSETXID). The second issue is done by a stack allocation in parent and a synchronization with using a pipe or waitpid (in case or error). The pipe has the advantage of allowing the child signal an exec error (checked with new tst-spawn2 test). There is an inherent race condition in pipe2 usage for architectures that do not support the syscall directly. In such cases the a pipe plus fctnl is used instead and it may lead to file descriptor leak in parent (as decribed by fcntl documentation). The child process stack is allocate with a mmap with MAP_STACK flag using default architecture stack size. Although it is slower than use a stack buffer from parent, it allows some slack for the compatibility code to run scripts with no shebang (which may use a buffer with size depending of argument list count). Performance should be similar to the vfork default posix implementation and way faster than fork path (vfork on mostly linux ports are basically clone with CLONE_VM plus CLONE_VFORK). The only difference is the syscalls required for the stack allocation/deallocation. It fixes BZ#10354, BZ#14750, and BZ#18433. Tested on i386, x86_64, powerpc64le, and aarch64. [BZ #14750] [BZ #10354] [BZ #18433] * include/sched.h (__clone): Add hidden prototype. (__clone2): Likewise. * include/unistd.h (__dup): Likewise. * posix/Makefile (tests): Add tst-spawn2. * posix/tst-spawn2.c: New file. * sysdeps/posix/dup.c (__dup): Add hidden definition. * sysdeps/unix/sysv/linux/aarch64/clone.S (__clone): Likewise. * sysdeps/unix/sysv/linux/alpha/clone.S (__clone): Likewise. * sysdeps/unix/sysv/linux/arm/clone.S (__clone): Likewise. * sysdeps/unix/sysv/linux/hppa/clone.S (__clone): Likewise. * sysdeps/unix/sysv/linux/i386/clone.S (__clone): Likewise. * sysdeps/unix/sysv/linux/ia64/clone2.S (__clone): Likewise. * sysdeps/unix/sysv/linux/m68k/clone.S (__clone): Likewise. * sysdeps/unix/sysv/linux/microblaze/clone.S (__clone): Likewise. * sysdeps/unix/sysv/linux/mips/clone.S (__clone): Likewise. * sysdeps/unix/sysv/linux/nios2/clone.S (__clone): Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc32/clone.S (__clone): Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc64/clone.S (__clone): Likewise. * sysdeps/unix/sysv/linux/s390/s390-32/clone.S (__clone): Likewise. * sysdeps/unix/sysv/linux/s390/s390-64/clone.S (__clone): Likewise. * sysdeps/unix/sysv/linux/sh/clone.S (__clone): Likewise. * sysdeps/unix/sysv/linux/sparc/sparc32/clone.S (__clone): Likewise. * sysdeps/unix/sysv/linux/sparc/sparc64/clone.S (__clone): Likewise. * sysdeps/unix/sysv/linux/tile/clone.S (__clone): Likewise. * sysdeps/unix/sysv/linux/x86_64/clone.S (__clone): Likewise. * sysdeps/unix/sysv/linux/nptl-signals.h (____nptl_is_internal_signal): New function. * sysdeps/unix/sysv/linux/spawni.c: New file.
2016-01-19 19:33:32 +00:00
libc_hidden_def (__clone)
1997-05-21 01:44:03 +00:00
weak_alias (__clone, clone)