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/* Copyright (C) 2003-2016 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 IS_IN (libc) || IS_IN (libpthread) || IS_IN (librt)
# define _IMM12 #-12
# define _IMM16 #-16
# define _IMP16 #16
# undef PSEUDO
# define PSEUDO(name, syscall_name, args) \
.text; \
ENTRY (name); \
.Lpseudo_start: \
SINGLE_THREAD_P; \
bf .Lpseudo_cancel; \
.type __##syscall_name##_nocancel,@function; \
.globl __##syscall_name##_nocancel; \
__##syscall_name##_nocancel: \
DO_CALL (syscall_name, args); \
mov r0,r1; \
mov _IMM12,r2; \
shad r2,r1; \
not r1,r1; \
tst r1,r1; \
bt .Lsyscall_error; \
bra .Lpseudo_end; \
nop; \
.size __##syscall_name##_nocancel,.-__##syscall_name##_nocancel; \
.Lpseudo_cancel: \
sts.l pr,@-r15; \
cfi_adjust_cfa_offset (4); \
cfi_rel_offset (pr, 0); \
add _IMM16,r15; \
cfi_adjust_cfa_offset (16); \
SAVE_ARGS_##args; \
CENABLE; \
LOAD_ARGS_##args; \
add _IMP16,r15; \
cfi_adjust_cfa_offset (-16); \
lds.l @r15+,pr; \
cfi_adjust_cfa_offset (-4); \
cfi_restore (pr); \
DO_CALL(syscall_name, args); \
SYSCALL_INST_PAD; \
sts.l pr,@-r15; \
cfi_adjust_cfa_offset (4); \
cfi_rel_offset (pr, 0); \
mov.l r0,@-r15; \
cfi_adjust_cfa_offset (4); \
cfi_rel_offset (r0, 0); \
CDISABLE; \
mov.l @r15+,r0; \
cfi_adjust_cfa_offset (-4); \
cfi_restore (r0); \
lds.l @r15+,pr; \
cfi_adjust_cfa_offset (-4); \
cfi_restore (pr); \
mov r0,r1; \
mov _IMM12,r2; \
shad r2,r1; \
not r1,r1; \
tst r1,r1; \
bf .Lpseudo_end; \
.Lsyscall_error: \
SYSCALL_ERROR_HANDLER; \
.Lpseudo_end:
# undef PSEUDO_END
# define PSEUDO_END(sym) \
END (sym)
# define SAVE_ARGS_0 /* Nothing. */
# define SAVE_ARGS_1 SAVE_ARGS_0; mov.l r4,@(0,r15); cfi_offset (r4,-4)
# define SAVE_ARGS_2 SAVE_ARGS_1; mov.l r5,@(4,r15); cfi_offset (r5,-8)
# define SAVE_ARGS_3 SAVE_ARGS_2; mov.l r6,@(8,r15); cfi_offset (r6,-12)
# define SAVE_ARGS_4 SAVE_ARGS_3; mov.l r7,@(12,r15); cfi_offset (r7,-16)
# define SAVE_ARGS_5 SAVE_ARGS_4
# define SAVE_ARGS_6 SAVE_ARGS_5
# define LOAD_ARGS_0 /* Nothing. */
# define LOAD_ARGS_1 LOAD_ARGS_0; mov.l @(0,r15),r4; cfi_restore (r4)
# define LOAD_ARGS_2 LOAD_ARGS_1; mov.l @(4,r15),r5; cfi_restore (r5)
# define LOAD_ARGS_3 LOAD_ARGS_2; mov.l @(8,r15),r6; cfi_restore (r6)
# define LOAD_ARGS_4 LOAD_ARGS_3; mov.l @(12,r15),r7; cfi_restore (r7)
# define LOAD_ARGS_5 LOAD_ARGS_4
# define LOAD_ARGS_6 LOAD_ARGS_5
# if IS_IN (libpthread)
# define __local_enable_asynccancel __pthread_enable_asynccancel
# define __local_disable_asynccancel __pthread_disable_asynccancel
# elif IS_IN (libc)
# define __local_enable_asynccancel __libc_enable_asynccancel
# define __local_disable_asynccancel __libc_disable_asynccancel
# elif IS_IN (librt)
# define __local_enable_asynccancel __librt_enable_asynccancel
# define __local_disable_asynccancel __librt_disable_asynccancel
# else
# error Unsupported library
# endif
# define CENABLE \
mov.l 1f,r0; \
bsrf r0; \
nop; \
0: bra 2f; \
mov r0,r2; \
.align 2; \
1: .long __local_enable_asynccancel - 0b; \
2:
# define CDISABLE \
mov.l 1f,r0; \
bsrf r0; \
mov r2,r4; \
0: bra 2f; \
nop; \
.align 2; \
1: .long __local_disable_asynccancel - 0b; \
2:
# ifndef __ASSEMBLER__
# define SINGLE_THREAD_P \
__builtin_expect (THREAD_GETMEM (THREAD_SELF, \
header.multiple_threads) == 0, 1)
# else
# define SINGLE_THREAD_P \
stc gbr,r0; \
mov.w 0f,r1; \
sub r1,r0; \
mov.l @(MULTIPLE_THREADS_OFFSET,r0),r0; \
bra 1f; \
tst r0,r0; \
0: .word TLS_PRE_TCB_SIZE; \
1:
# 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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