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/* Copyright (C) 2003, 2004 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 <sysdep.h>
#include <tls.h>
#ifndef __ASSEMBLER__
# include <linuxthreads/internals.h>
#endif
#if !defined NOT_IN_libc || defined IS_IN_libpthread || defined IS_IN_librt
# if !defined NOT_IN_libc || defined IS_IN_libpthread
# define PSEUDO_CANCEL(name, syscall_name, args) \
L(pseudo_cancel): \
STM_##args \
stm %r12,%r15,48(%r15); \
lr %r14,%r15; \
ahi %r15,-96; \
st %r14,0(%r15); \
basr %r13,0; \
0: l %r1,1f-0b(%r13); \
bas %r14,0(%r1,%r13); \
lr %r0,%r2; \
LM_##args \
DO_CALL(syscall_name, args); \
l %r1,2f-0b(%r13); \
lr %r12,%r2; \
lr %r2,%r0; \
bas %r14,0(%r1,%r13); \
lr %r2,%r12; \
lm %r12,%r15,48+96(%r15); \
j L(pseudo_check); \
1: .long CENABLE-0b; \
2: .long CDISABLE-0b;
# else /* !libc.so && !libpthread.so */
# define PSEUDO_CANCEL(name, syscall_name, args) \
L(pseudo_cancel): \
STM_##args \
stm %r11,%r15,44(%r15); \
lr %r14,%r15; \
ahi %r15,-96; \
st %r14,0(%r15); \
basr %r13,0; \
0: l %r12,3f-0b(%r13); \
l %r1,1f-0b(%r13); \
la %r12,0(%r12,%r13); \
bas %r14,0(%r1,%r13); \
lr %r0,%r2; \
LM_##args \
DO_CALL(syscall_name, args); \
l %r1,2f-0b(%r13); \
lr %r11,%r2; \
lr %r2,%r0; \
bas %r14,0(%r1,%r13); \
lr %r2,%r11; \
lm %r11,%r15,44+96(%r15); \
j L(pseudo_check); \
1: .long CENABLE@PLT-0b; \
2: .long CDISABLE@PLT-0b; \
3: .long _GLOBAL_OFFSET_TABLE_-0b;
# endif
# undef PSEUDO
# define PSEUDO(name, syscall_name, args) \
.text; \
PSEUDO_CANCEL(name, syscall_name, args) \
ENTRY(name) \
SINGLE_THREAD_P(%r1) \
jne L(pseudo_cancel); \
DO_CALL(syscall_name, args); \
L(pseudo_check): \
lhi %r4,-4095; \
clr %r2,%r4; \
jnl SYSCALL_ERROR_LABEL; \
L(pseudo_end):
# ifdef IS_IN_libpthread
# define CENABLE __pthread_enable_asynccancel
# define CDISABLE __pthread_disable_asynccancel
# elif !defined NOT_IN_libc
# define CENABLE __libc_enable_asynccancel
# define CDISABLE __libc_disable_asynccancel
# else
# define CENABLE __librt_enable_asynccancel
# define CDISABLE __librt_disable_asynccancel
# endif
#define STM_0 /* Nothing */
#define STM_1 st %r2,8(%r15);
#define STM_2 stm %r2,%r3,8(%r15);
#define STM_3 stm %r2,%r4,8(%r15);
#define STM_4 stm %r2,%r5,8(%r15);
#define STM_5 stm %r2,%r5,8(%r15);
#define LM_0 /* Nothing */
#define LM_1 l %r2,8+96(%r15);
#define LM_2 lm %r2,%r3,8+96(%r15);
#define LM_3 lm %r2,%r4,8+96(%r15);
#define LM_4 lm %r2,%r5,8+96(%r15);
#define LM_5 lm %r2,%r5,8+96(%r15);
# ifndef __ASSEMBLER__
# define SINGLE_THREAD_P \
__builtin_expect (THREAD_GETMEM (THREAD_SELF, \
p_header.data.multiple_threads) == 0, 1)
# else
# define SINGLE_THREAD_P(reg) \
ear reg,%a0; \
icm reg,15,MULTIPLE_THREADS_OFFSET(reg);
# 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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