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/* Copyright (C) 2003 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
# 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_INT; \
bne .Lpseudo_cancel; \
DO_CALL (syscall_name, args); \
cmn r0, $4096; \
PSEUDO_RET_MOV; \
.Lpseudo_cancel: \
MAYBE_SAVE_LR; \
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_INT \
ldr ip, =__local_multiple_threads; \
ldr ip, [ip]; \
teq ip, #0;
# define SINGLE_THREAD_P SINGLE_THREAD_P_INT
# define MAYBE_SAVE_LR \
str lr, [sp, $-4]!;
# define PSEUDO_RET_MOV \
RETINSTR(movcc, pc, lr); \
b PLTJMP(SYSCALL_ERROR)
# define PSEUDO_PROLOGUE
# else
# define SINGLE_THREAD_P_PIC(reg) \
ldr ip, 1b; \
ldr reg, 2b; \
3: \
add ip, pc, ip; \
ldr ip, [ip, reg]; \
teq ip, #0;
# define SINGLE_THREAD_P_INT \
str lr, [sp, $-4]!; \
SINGLE_THREAD_P_PIC(lr)
# define SINGLE_THREAD_P \
SINGLE_THREAD_P_INT; \
ldr lr, [sp], $4
# define PSEUDO_PROLOGUE \
1: .word _GLOBAL_OFFSET_TABLE_ - 3f - 8; \
2: .word __local_multiple_threads(GOTOFF);
# define MAYBE_SAVE_LR /* lr already saved */
# define PSEUDO_RET_MOV PSEUDO_RET
# 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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