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/* Copyright (C) 2003-2015 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 <nptl/pthreadP.h>
#endif
#if IS_IN (libc) || IS_IN (libpthread) || IS_IN (librt)
# undef PSEUDO
# define PSEUDO(name, syscall_name, args) \
.text; \
L(pseudo_cancel): \
cfi_startproc; \
STM_##args \
stmg %r13,%r15,104(%r15); \
cfi_offset (%r15,-40); \
cfi_offset (%r14,-48); \
cfi_offset (%r13,-56); \
lgr %r14,%r15; \
aghi %r15,-160; \
cfi_adjust_cfa_offset (160); \
stg %r14,0(%r15); \
brasl %r14,CENABLE; \
lgr %r0,%r2; \
LM_##args \
.if SYS_ify (syscall_name) < 256; \
svc SYS_ify (syscall_name); \
.else; \
lghi %r1,SYS_ify (syscall_name); \
svc 0; \
.endif; \
LR7_##args \
lgr %r13,%r2; \
lgr %r2,%r0; \
brasl %r14,CDISABLE; \
lgr %r2,%r13; \
lmg %r13,%r15,104+160(%r15); \
cfi_endproc; \
j L(pseudo_check); \
ENTRY(name) \
SINGLE_THREAD_P \
jne L(pseudo_cancel); \
.type __##syscall_name##_nocancel,@function; \
.globl __##syscall_name##_nocancel; \
__##syscall_name##_nocancel: \
DO_CALL(syscall_name, args); \
L(pseudo_check): \
lghi %r4,-4095; \
clgr %r2,%r4; \
jgnl SYSCALL_ERROR_LABEL; \
.size __##syscall_name##_nocancel,.-__##syscall_name##_nocancel; \
L(pseudo_end):
# if IS_IN (libpthread)
# define CENABLE __pthread_enable_asynccancel
# define CDISABLE __pthread_disable_asynccancel
# define __local_multiple_threads __pthread_multiple_threads
# elif IS_IN (libc)
# define CENABLE __libc_enable_asynccancel
# define CDISABLE __libc_disable_asynccancel
# define __local_multiple_threads __libc_multiple_threads
# elif IS_IN (librt)
# define CENABLE __librt_enable_asynccancel
# define CDISABLE __librt_disable_asynccancel
# else
# error Unsupported library
# endif
#define STM_0 /* Nothing */
#define STM_1 stg %r2,16(%r15);
#define STM_2 stmg %r2,%r3,16(%r15);
#define STM_3 stmg %r2,%r4,16(%r15);
#define STM_4 stmg %r2,%r5,16(%r15);
#define STM_5 stmg %r2,%r5,16(%r15);
#define STM_6 stmg %r2,%r7,16(%r15);
#define LM_0 /* Nothing */
#define LM_1 lg %r2,16+160(%r15);
#define LM_2 lmg %r2,%r3,16+160(%r15);
#define LM_3 lmg %r2,%r4,16+160(%r15);
#define LM_4 lmg %r2,%r5,16+160(%r15);
#define LM_5 lmg %r2,%r5,16+160(%r15);
#define LM_6 lmg %r2,%r5,16+160(%r15); \
cfi_offset (%r7, -104); \
lg %r7,160+160(%r15);
#define LR7_0 /* Nothing */
#define LR7_1 /* Nothing */
#define LR7_2 /* Nothing */
#define LR7_3 /* Nothing */
#define LR7_4 /* Nothing */
#define LR7_5 /* Nothing */
#define LR7_6 lg %r7,56+160(%r15); \
cfi_restore (%r7);
# if IS_IN (libpthread) || IS_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 \
larl %r1,__local_multiple_threads; \
icm %r0,15,0(%r1);
# endif
# else
# ifndef __ASSEMBLER__
# define SINGLE_THREAD_P \
__builtin_expect (THREAD_GETMEM (THREAD_SELF, \
header.multiple_threads) == 0, 1)
# else
# define SINGLE_THREAD_P \
ear %r1,%a0; \
sllg %r1,%r1,32; \
ear %r1,%a1; \
icm %r1,15,MULTIPLE_THREADS_OFFSET(%r1);
# endif
# endif
#elif !defined __ASSEMBLER__
# 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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