mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-01 01:00:10 +00:00
170 lines
4.6 KiB
C
170 lines
4.6 KiB
C
/* 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
|