[arm] Remove linuxthreads support.

This commit is contained in:
Ulrich Weigand 2011-03-21 20:46:01 +00:00 committed by Joseph Myers
parent b53600e5ca
commit ea4774c3f3
8 changed files with 6 additions and 633 deletions

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@ -1,3 +1,9 @@
2011-03-21 Ulrich Weigand <ulrich.weigand@linaro.org>
* sysdeps/arm/linuxthreads: Remove directory.
* sysdeps/unix/sysv/linux/arm/linuxthreads: Likewise.
* sysdeps/unix/sysv/linux/arm/eabi/linuxthreads: Likewise.
2011-03-21 Ulrich Weigand <ulrich.weigand@linaro.org>
* sysdeps/unix/sysv/linux/arm/eabi/nptl/sysdep-cancel.h (PSEUDO): Add

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/* POSIX spinlock implementation. Arm version.
Copyright (C) 2000 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; see the file COPYING.LIB. If not,
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#include <errno.h>
#include <pthread.h>
#include "internals.h"
int
__pthread_spin_lock (pthread_spinlock_t *lock)
{
unsigned int val;
do
asm volatile ("swp %0, %1, [%2]"
: "=r" (val)
: "0" (1), "r" (lock)
: "memory");
while (val != 0);
return 0;
}
weak_alias (__pthread_spin_lock, pthread_spin_lock)
int
__pthread_spin_trylock (pthread_spinlock_t *lock)
{
unsigned int val;
asm volatile ("swp %0, %1, [%2]"
: "=r" (val)
: "0" (1), "r" (lock)
: "memory");
return val ? EBUSY : 0;
}
weak_alias (__pthread_spin_trylock, pthread_spin_trylock)
int
__pthread_spin_unlock (pthread_spinlock_t *lock)
{
return *lock = 0;
}
weak_alias (__pthread_spin_unlock, pthread_spin_unlock)
int
__pthread_spin_init (pthread_spinlock_t *lock, int pshared)
{
/* We can ignore the `pshared' parameter. Since we are busy-waiting
all processes which can access the memory location `lock' points
to can use the spinlock. */
return *lock = 0;
}
weak_alias (__pthread_spin_init, pthread_spin_init)
int
__pthread_spin_destroy (pthread_spinlock_t *lock)
{
/* Nothing to do. */
return 0;
}
weak_alias (__pthread_spin_destroy, pthread_spin_destroy)

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/* Machine-dependent pthreads configuration and inline functions.
ARM version.
Copyright (C) 1997, 1998, 2000, 2002, 2003 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Philip Blundell <philb@gnu.org>.
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; see the file COPYING.LIB. If not,
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#ifndef _PT_MACHINE_H
#define _PT_MACHINE_H 1
#ifndef PT_EI
# define PT_EI extern inline __attribute__ ((always_inline))
#endif
extern long int testandset (int *spinlock);
extern int __compare_and_swap (long int *p, long int oldval, long int newval);
/* This will not work on ARM1 or ARM2 because SWP is lacking on those
machines. Unfortunately we have no way to detect this at compile
time; let's hope nobody tries to use one. */
/* Spinlock implementation; required. */
PT_EI long int
testandset (int *spinlock)
{
register unsigned int ret;
__asm__ __volatile__("swp %0, %1, [%2]"
: "=r"(ret)
: "0"(1), "r"(spinlock));
return ret;
}
/* Get some notion of the current stack. Need not be exactly the top
of the stack, just something somewhere in the current frame. */
#define CURRENT_STACK_FRAME stack_pointer
register char * stack_pointer __asm__ ("sp");
#endif /* pt-machine.h */

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/* Definitions for thread-local data handling. linuxthreads/ARM version.
Copyright (C) 2004 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, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#ifndef _TLS_H
#define _TLS_H
#ifndef __ASSEMBLER__
# include <stdbool.h>
# include <pt-machine.h>
# include <stddef.h>
/* Type for the dtv. */
typedef union dtv
{
size_t counter;
struct
{
void *val;
bool is_static;
} pointer;
} dtv_t;
typedef struct
{
dtv_t *dtv;
/* Reserved for the thread implementation. Unused in LinuxThreads. */
void *private;
} tcbhead_t;
#endif
/* We can support TLS only if the floating-stack support is available.
However, we want to compile in the support and test at runtime whether
the running kernel can support it or not. To avoid bothering with the
TLS support code at all, use configure --without-tls.
We need USE_TLS to be consistently defined, for ldsodefs.h conditionals.
But some of the code below can cause problems in building libpthread
(e.g. useldt.h will defined FLOATING_STACKS when it shouldn't). */
/* LinuxThreads can only support TLS if both floating stacks and support
from the tools are available.
We have to define USE_TLS consistently, or ldsodefs.h will lay out types
differently between an NPTL build and a LinuxThreads build. It can be set
for libc.so and not libpthread.so, but only if we provide appropriate padding
in the _pthread_descr_struct.
Currently nothing defines FLOATING_STACKS. We could assume this based on
kernel version once the TLS patches are available in kernel.org.
To avoid bothering with the TLS support code at all, use configure
--without-tls. */
#if defined HAVE_TLS_SUPPORT \
&& (defined FLOATING_STACKS || !defined IS_IN_libpthread)
/* Signal that TLS support is available. */
# define USE_TLS 1
/* Include padding in _pthread_descr_struct so that libc can find p_errno,
if libpthread will only include the padding because of the !IS_IN_libpthread
check. */
#ifndef FLOATING_STACKS
# define INCLUDE_TLS_PADDING 1
#endif
# ifndef __ASSEMBLER__
/* Get system call information. */
# include <sysdep.h>
/* This is the size of the initial TCB. */
# define TLS_INIT_TCB_SIZE sizeof (tcbhead_t)
/* Alignment requirements for the initial TCB. */
# define TLS_INIT_TCB_ALIGN __alignof__ (tcbhead_t)
/* This is the size of the TCB. */
# define TLS_TCB_SIZE sizeof (tcbhead_t)
/* Alignment requirements for the TCB. */
# define TLS_TCB_ALIGN __alignof__ (tcbhead_t)
/* This is the size we need before TCB. */
# define TLS_PRE_TCB_SIZE sizeof (struct _pthread_descr_struct)
/* The DTV is allocated at the TP; the TCB is placed elsewhere. */
# define TLS_DTV_AT_TP 1
/* Install the dtv pointer. The pointer passed is to the element with
index -1 which contain the length. */
# define INSTALL_DTV(TCBP, DTVP) \
(((tcbhead_t *) (TCBP))->dtv = (DTVP) + 1)
/* Install new dtv for current thread. */
# define INSTALL_NEW_DTV(DTV) \
(((tcbhead_t *)__builtin_thread_pointer ())->dtv = (DTV))
/* Return dtv of given thread descriptor. */
# define GET_DTV(TCBP) \
(((tcbhead_t *) (TCBP))->dtv)
/* Code to initially initialize the thread pointer. This might need
special attention since 'errno' is not yet available and if the
operation can cause a failure 'errno' must not be touched. */
# define TLS_INIT_TP(TCBP, SECONDCALL) \
({ INTERNAL_SYSCALL_DECL (err); \
long result_var; \
result_var = INTERNAL_SYSCALL_ARM (set_tls, err, 1, (TCBP)); \
INTERNAL_SYSCALL_ERROR_P (result_var, err) \
? "unknown error" : NULL; })
/* Return the address of the dtv for the current thread. */
# define THREAD_DTV() \
(((tcbhead_t *)__builtin_thread_pointer ())->dtv)
/* Return the thread descriptor for the current thread. */
# undef THREAD_SELF
# define THREAD_SELF \
((pthread_descr)__builtin_thread_pointer () - 1)
# undef INIT_THREAD_SELF
# define INIT_THREAD_SELF(DESCR, NR) \
TLS_INIT_TP ((struct _pthread_descr_struct *)(DESCR) + 1, 0)
/* Get the thread descriptor definition. */
# include <linuxthreads/descr.h>
/* ??? Generic bits of LinuxThreads may call these macros with
DESCR set to NULL. We are expected to be able to reference
the "current" value.
In our case, we'd really prefer to use DESCR, since lots of
PAL_code calls would be expensive. We can only trust that
the compiler does its job and unifies the multiple
__builtin_thread_pointer instances. */
#define THREAD_GETMEM(descr, member) \
((void) sizeof (descr), THREAD_SELF->member)
#define THREAD_GETMEM_NC(descr, member) \
((void) sizeof (descr), THREAD_SELF->member)
#define THREAD_SETMEM(descr, member, value) \
((void) sizeof (descr), THREAD_SELF->member = (value))
#define THREAD_SETMEM_NC(descr, member, value) \
((void) sizeof (descr), THREAD_SELF->member = (value))
/* Initializing the thread pointer will generate a SIGILL if the syscall
is not available. */
#define TLS_INIT_TP_EXPENSIVE 1
# endif /* HAVE_TLS_SUPPORT */
#endif /* __ASSEMBLER__ */
#endif /* tls.h */

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/* Copyright (C) 2003, 2005 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, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <sysdep.h>
#ifndef __ASSEMBLER__
# include <linuxthreads/internals.h>
#endif
#if !defined NOT_IN_libc || defined IS_IN_libpthread
# undef PSEUDO
# define PSEUDO(name, syscall_name, args) \
.section ".text"; \
PSEUDO_PROLOGUE; \
ENTRY (name); \
SINGLE_THREAD_P; \
DOARGS_##args; \
bne .Lpseudo_cancel; \
mov ip, r7; \
ldr r7, =SYS_ify (syscall_name); \
swi 0x0; \
mov r7, ip; \
UNDOARGS_##args; \
cmn r0, $4096; \
PSEUDO_RET; \
.Lpseudo_cancel: \
DOCARGS_##args; /* save syscall args etc. around CENABLE. */ \
CENABLE; \
mov ip, r0; /* put mask in safe place. */ \
UNDOCARGS_##args; /* restore syscall args. */ \
ldr r7, =SYS_ify (syscall_name); \
swi 0x0; /* do the call. */ \
mov r7, r0; /* save syscall return value. */ \
mov r0, ip; /* get mask back. */ \
CDISABLE; \
mov r0, r7; /* retrieve return value. */ \
RESTORE_LR_##args; \
UNDOARGS_##args; \
cmn r0, $4096;
/* DOARGS pushes four bytes on the stack for five arguments, eight bytes for
six arguments, and nothing for fewer. In order to preserve doubleword
alignment, sometimes we must save an extra register. */
# define DOCARGS_0 stmfd sp!, {r7, lr}
# define UNDOCARGS_0
# define RESTORE_LR_0 ldmfd sp!, {r7, lr}
# define DOCARGS_1 stmfd sp!, {r0, r1, r7, lr}
# define UNDOCARGS_1 ldr r0, [sp], #8
# define RESTORE_LR_1 RESTORE_LR_0
# define DOCARGS_2 stmfd sp!, {r0, r1, r7, lr}
# define UNDOCARGS_2 ldmfd sp!, {r0, r1}
# define RESTORE_LR_2 RESTORE_LR_0
# define DOCARGS_3 stmfd sp!, {r0, r1, r2, r3, r7, lr}
# define UNDOCARGS_3 ldmfd sp!, {r0, r1, r2, r3}
# define RESTORE_LR_3 RESTORE_LR_0
# define DOCARGS_4 stmfd sp!, {r0, r1, r2, r3, r7, lr}
# define UNDOCARGS_4 ldmfd sp!, {r0, r1, r2, r3}
# define RESTORE_LR_4 RESTORE_LR_0
# define DOCARGS_5 stmfd sp!, {r0, r1, r2, r3, r4, r7, lr}
# define UNDOCARGS_5 ldmfd sp!, {r0, r1, r2, r3}
# define RESTORE_LR_5 ldmfd sp!, {r4, r7, lr}
# define DOCARGS_6 stmfd sp!, {r0, r1, r2, r3, r7, lr}
# define UNDOCARGS_6 ldmfd sp!, {r0, r1, r2, r3}
# define RESTORE_LR_6 RESTORE_LR_0
# ifdef IS_IN_libpthread
# define CENABLE bl PLTJMP(__pthread_enable_asynccancel)
# define CDISABLE bl PLTJMP(__pthread_disable_asynccancel)
# define __local_multiple_threads __pthread_multiple_threads
# else
# define CENABLE bl PLTJMP(__libc_enable_asynccancel)
# define CDISABLE bl PLTJMP(__libc_disable_asynccancel)
# define __local_multiple_threads __libc_multiple_threads
# endif
# ifndef __ASSEMBLER__
extern int __local_multiple_threads attribute_hidden;
# define SINGLE_THREAD_P __builtin_expect (__local_multiple_threads == 0, 1)
# else
# define SINGLE_THREAD_P \
ldr ip, 1b; \
2: \
ldr ip, [pc, ip]; \
teq ip, #0;
# define PSEUDO_PROLOGUE \
1: .word __local_multiple_threads - 2f - 8;
# endif
#else
/* For rtld, et cetera. */
# define SINGLE_THREAD_P 1
#endif

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#include <linuxthreads/sysdeps/unix/sysv/linux/fork.c>

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/* Copyright (C) 2003, 2005 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Phil Blundell <pb@nexus.co.uk>, 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, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <sysdep.h>
#ifndef __ASSEMBLER__
# include <linuxthreads/internals.h>
#endif
#if !defined NOT_IN_libc || defined IS_IN_libpthread
/* We push lr onto the stack, so we have to use ldmib instead of ldmia
to find the saved arguments. */
# ifdef PIC
# undef DOARGS_5
# undef DOARGS_6
# undef DOARGS_7
# define DOARGS_5 str r4, [sp, $-4]!; ldr r4, [sp, $8];
# define DOARGS_6 mov ip, sp; stmfd sp!, {r4, r5}; ldmib ip, {r4, r5};
# define DOARGS_7 mov ip, sp; stmfd sp!, {r4, r5, r6}; ldmib ip, {r4, r5, r6};
# endif
# undef PSEUDO_RET
# define PSEUDO_RET \
ldrcc pc, [sp], $4; \
ldr lr, [sp], $4; \
b PLTJMP(SYSCALL_ERROR)
# undef PSEUDO
# define PSEUDO(name, syscall_name, args) \
.section ".text"; \
PSEUDO_PROLOGUE; \
ENTRY (name); \
SINGLE_THREAD_P; \
bne .Lpseudo_cancel; \
DO_CALL (syscall_name, args); \
cmn r0, $4096; \
RETINSTR(cc, lr); \
b PLTJMP(SYSCALL_ERROR); \
.Lpseudo_cancel: \
str lr, [sp, $-4]!; \
DOCARGS_##args; /* save syscall args around CENABLE. */ \
CENABLE; \
mov ip, r0; /* put mask in safe place. */ \
UNDOCARGS_##args; /* restore syscall args. */ \
swi SYS_ify (syscall_name); /* do the call. */ \
str r0, [sp, $-4]!; /* save syscall return value. */ \
mov r0, ip; /* get mask back. */ \
CDISABLE; \
ldr r0, [sp], $4; /* retrieve return value. */ \
UNDOC2ARGS_##args; /* fix register damage. */ \
cmn r0, $4096;
# define DOCARGS_0
# define UNDOCARGS_0
# define UNDOC2ARGS_0
# define DOCARGS_1 str r0, [sp, #-4]!;
# define UNDOCARGS_1 ldr r0, [sp], #4;
# define UNDOC2ARGS_1
# define DOCARGS_2 str r1, [sp, #-4]!; str r0, [sp, #-4]!;
# define UNDOCARGS_2 ldr r0, [sp], #4; ldr r1, [sp], #4;
# define UNDOC2ARGS_2
# define DOCARGS_3 str r2, [sp, #-4]!; str r1, [sp, #-4]!; str r0, [sp, #-4]!;
# define UNDOCARGS_3 ldr r0, [sp], #4; ldr r1, [sp], #4; ldr r2, [sp], #4
# define UNDOC2ARGS_3
# define DOCARGS_4 stmfd sp!, {r0-r3}
# define UNDOCARGS_4 ldmfd sp!, {r0-r3}
# define UNDOC2ARGS_4
# define DOCARGS_5 stmfd sp!, {r0-r3}
# define UNDOCARGS_5 ldmfd sp, {r0-r3}; str r4, [sp, #-4]!; ldr r4, [sp, #24]
# define UNDOC2ARGS_5 ldr r4, [sp], #20
# ifdef IS_IN_libpthread
# define CENABLE bl PLTJMP(__pthread_enable_asynccancel)
# define CDISABLE bl PLTJMP(__pthread_disable_asynccancel)
# define __local_multiple_threads __pthread_multiple_threads
# else
# define CENABLE bl PLTJMP(__libc_enable_asynccancel)
# define CDISABLE bl PLTJMP(__libc_disable_asynccancel)
# define __local_multiple_threads __libc_multiple_threads
# endif
# ifndef __ASSEMBLER__
extern int __local_multiple_threads attribute_hidden;
# define SINGLE_THREAD_P __builtin_expect (__local_multiple_threads == 0, 1)
# else
# if !defined PIC
# define SINGLE_THREAD_P \
ldr ip, =__local_multiple_threads; \
ldr ip, [ip]; \
teq ip, #0;
# define PSEUDO_PROLOGUE
# else
# define SINGLE_THREAD_P \
ldr ip, 1b; \
2: \
ldr ip, [pc, ip]; \
teq ip, #0;
# define PSEUDO_PROLOGUE \
1: .word __local_multiple_threads - 2f - 8;
# endif
# endif
#elif !defined __ASSEMBLER__
/* This code should never be used but we define it anyhow. */
# define SINGLE_THREAD_P (1)
#endif

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/* Copyright (C) 1999, 2002, 2003, 2005 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Philip Blundell <philb@gnu.org>.
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, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <sysdep-cancel.h>
#define _ERRNO_H 1
#include <bits/errno.h>
#include <kernel-features.h>
/* Clone the calling process, but without copying the whole address space.
The calling process is suspended until the new process exits or is
replaced by a call to `execve'. Return -1 for errors, 0 to the new process,
and the process ID of the new process to the old process. */
ENTRY (__vfork)
#ifdef __NR_vfork
#ifdef SHARED
ldr ip, 1f
ldr r0, 2f
3: add ip, pc, ip
ldr r0, [ip, r0]
#else
ldr r0, 1f
#endif
movs r0, r0
bne HIDDEN_JUMPTARGET (__fork)
DO_CALL (vfork, 0)
cmn a1, #4096
RETINSTR(cc, lr)
#ifndef __ASSUME_VFORK_SYSCALL
/* Check if vfork syscall is known at all. */
cmn a1, #ENOSYS
bne PLTJMP(C_SYMBOL_NAME(__syscall_error))
#endif
#endif
#ifndef __ASSUME_VFORK_SYSCALL
/* If we don't have vfork, fork is close enough. */
DO_CALL (fork, 0)
cmn a1, #4096
RETINSTR(cc, lr)
#elif !defined __NR_vfork
# error "__NR_vfork not available and __ASSUME_VFORK_SYSCALL defined"
#endif
b PLTJMP(C_SYMBOL_NAME(__syscall_error))
#ifdef SHARED
1: .word _GLOBAL_OFFSET_TABLE_ - 3b - 8
2: .word __libc_pthread_functions(GOTOFF)
#else
.weak pthread_create
1: .word pthread_create
#endif
PSEUDO_END (__vfork)
libc_hidden_def (__vfork)
weak_alias (__vfork, vfork)