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/* Copyright (C) 2003, 2004, 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>
#include <tcb-offsets.h>
#ifndef __ASSEMBLER__
# include <pthreadP.h>
#endif
#if !defined NOT_IN_libc || defined IS_IN_libpthread || defined IS_IN_librt
# undef PSEUDO
# define PSEUDO(name, syscall_name, args) \
.section ".text"; \
PSEUDO_PROLOGUE; \
.type __##syscall_name##_nocancel,%function; \
.globl __##syscall_name##_nocancel; \
__##syscall_name##_nocancel: \
DO_CALL (syscall_name, args); \
PSEUDO_RET; \
.size __##syscall_name##_nocancel,.-__##syscall_name##_nocancel; \
ENTRY (name); \
SINGLE_THREAD_P; \
DOARGS_##args; \
bne .Lpseudo_cancel; \
DO_CALL (syscall_name, 0); \
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. */ \
swi SYS_ify (syscall_name); /* do the call. */ \
str r0, [sp, $-4]!; /* save syscall return value. */ \
mov r0, ip; /* get mask back. */ \
CDISABLE; \
ldmfd sp!, {r0, lr}; /* retrieve return value and address. */ \
UNDOARGS_##args; \
cmn r0, $4096;
# define DOCARGS_0 str lr, [sp, #-4]!;
# define UNDOCARGS_0
# define DOCARGS_1 stmfd sp!, {r0, lr};
# define UNDOCARGS_1 ldr r0, [sp], #4;
# define DOCARGS_2 stmfd sp!, {r0, r1, lr};
# define UNDOCARGS_2 ldmfd sp!, {r0, r1};
# define DOCARGS_3 stmfd sp!, {r0, r1, r2, lr};
# define UNDOCARGS_3 ldmfd sp!, {r0, r1, r2};
# define DOCARGS_4 stmfd sp!, {r0, r1, r2, r3, lr};
# define UNDOCARGS_4 ldmfd sp!, {r0, r1, r2, r3};
# define DOCARGS_5 DOCARGS_4
# define UNDOCARGS_5 UNDOCARGS_4
# define DOCARGS_6 DOCARGS_5
# define UNDOCARGS_6 UNDOCARGS_5
# 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
# elif !defined NOT_IN_libc
# define CENABLE bl PLTJMP(__libc_enable_asynccancel)
# define CDISABLE bl PLTJMP(__libc_disable_asynccancel)
# define __local_multiple_threads __libc_multiple_threads
# elif defined IS_IN_librt
# define CENABLE bl PLTJMP(__librt_enable_asynccancel)
# define CDISABLE bl PLTJMP(__librt_disable_asynccancel)
# else
# error Unsupported library
# endif
# if defined IS_IN_libpthread || !defined NOT_IN_libc
# 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
/* There is no __local_multiple_threads for librt, so use the TCB. */
# ifndef __ASSEMBLER__
# define SINGLE_THREAD_P \
__builtin_expect (THREAD_GETMEM (THREAD_SELF, \
header.multiple_threads) == 0, 1)
# else
# define PSEUDO_PROLOGUE
# define SINGLE_THREAD_P \
stmfd sp!, {r0, lr}; \
bl __aeabi_read_tp; \
ldr ip, [r0, #MULTIPLE_THREADS_OFFSET]; \
ldmfd sp!, {r0, lr}; \
teq ip, #0
# define SINGLE_THREAD_P_PIC(x) SINGLE_THREAD_P
# endif
# endif
#elif !defined __ASSEMBLER__
/* For rtld, et cetera. */
# define SINGLE_THREAD_P 1
# define NO_CANCELLATION 1
#endif
#ifndef __ASSEMBLER__
# define RTLD_SINGLE_THREAD_P \
__builtin_expect (THREAD_GETMEM (THREAD_SELF, \
header.multiple_threads) == 0, 1)
#endif
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