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/* Copyright (C) 2003-2013 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, see
<http://www.gnu.org/licenses/>. */
#include <sysdep.h>
#include <tls.h>
#ifndef __ASSEMBLER__
# include <nptl/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"; \
.type __##syscall_name##_nocancel,%function; \
.globl __##syscall_name##_nocancel; \
__##syscall_name##_nocancel: \
cfi_startproc; \
DO_CALL (syscall_name, args); \
PSEUDO_RET; \
cfi_endproc; \
.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 x0, 4095; \
PSEUDO_RET; \
.Lpseudo_cancel: \
DOCARGS_##args; /* save syscall args etc. around CENABLE. */ \
CENABLE; \
mov x16, x0; /* put mask in safe place. */ \
UNDOCARGS_##args; /* restore syscall args. */ \
mov x8, SYS_ify (syscall_name); /* do the call. */ \
svc 0; \
str x0, [sp, -16]!; /* save syscall return value. */ \
cfi_adjust_cfa_offset (16); \
mov x0, x16; /* get mask back. */ \
CDISABLE; \
ldr x0, [sp], 16; \
cfi_adjust_cfa_offset (-16); \
ldr x30, [sp], 16; \
cfi_adjust_cfa_offset (-16); \
cfi_restore (x30); \
UNDOARGS_##args; \
cmn x0, 4095;
# define DOCARGS_0 \
str x30, [sp, -16]!; \
cfi_adjust_cfa_offset (16); \
cfi_rel_offset (x30, 0)
# define UNDOCARGS_0
# define DOCARGS_1 \
DOCARGS_0; \
str x0, [sp, -16]!; \
cfi_adjust_cfa_offset (16); \
cfi_rel_offset (x0, 0)
# define UNDOCARGS_1 \
ldr x0, [sp], 16; \
cfi_restore (x0); \
cfi_adjust_cfa_offset (-16); \
# define DOCARGS_2 \
DOCARGS_1; \
str x1, [sp, -16]!; \
cfi_adjust_cfa_offset (16); \
cfi_rel_offset (x1, 0)
# define UNDOCARGS_2 \
ldr x1, [sp], 16; \
cfi_restore (x1); \
cfi_adjust_cfa_offset (-16); \
UNDOCARGS_1
# define DOCARGS_3 \
DOCARGS_2; \
str x2, [sp, -16]!; \
cfi_adjust_cfa_offset (16); \
cfi_rel_offset (x2, 0)
# define UNDOCARGS_3 \
ldr x2, [sp], 16; \
cfi_restore (x2); \
cfi_adjust_cfa_offset (-16); \
UNDOCARGS_2
# define DOCARGS_4 \
DOCARGS_3; \
str x3, [sp, -16]!; \
cfi_adjust_cfa_offset (16); \
cfi_rel_offset (x3, 0)
# define UNDOCARGS_4 \
ldr x3, [sp], 16; \
cfi_restore (x3); \
cfi_adjust_cfa_offset (-16); \
UNDOCARGS_3
# define DOCARGS_5 \
DOCARGS_4; \
str x4, [sp, -16]!; \
cfi_adjust_cfa_offset (16); \
cfi_rel_offset (x4, 0)
# define UNDOCARGS_5 \
ldr x4, [sp], 16; \
cfi_restore (x4); \
cfi_adjust_cfa_offset (-16); \
UNDOCARGS_4
# define DOCARGS_6 \
DOCARGS_5; \
str x5, [sp, -16]!; \
cfi_adjust_cfa_offset (16); \
cfi_rel_offset (x5, 0)
# define UNDOCARGS_6 \
ldr x5, [sp], 16; \
cfi_restore (x5); \
cfi_adjust_cfa_offset (-16); \
UNDOCARGS_5
# ifdef IS_IN_libpthread
# define CENABLE bl __pthread_enable_asynccancel
# define CDISABLE bl __pthread_disable_asynccancel
# define __local_multiple_threads __pthread_multiple_threads
# elif !defined NOT_IN_libc
# define CENABLE bl __libc_enable_asynccancel
# define CDISABLE bl __libc_disable_asynccancel
# define __local_multiple_threads __libc_multiple_threads
# elif defined IS_IN_librt
# define CENABLE bl __librt_enable_asynccancel
# define CDISABLE bl __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 \
adrp x16, __local_multiple_threads; \
add x16, x16, #:lo12:__local_multiple_threads; \
ldr x16, [x16]; \
cmp x16, 0;
# 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 SINGLE_THREAD_P \
stp x0, x30, [sp, -16]!; \
cfi_adjust_cfa_offset (16); \
cfi_rel_offset (x0, 0); \
cfi_rel_offset (x30, 8); \
bl __read_tp; \
sub x0, x0, PTHREAD_SIZEOF; \
ldr x16, [x0, PTHREAD_MULTIPLE_THREADS_OFFSET]; \
ldp x0, x30, [sp], 16; \
cfi_restore (x0); \
cfi_restore (x30); \
cfi_adjust_cfa_offset (-16); \
cmp x16, 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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