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https://sourceware.org/git/glibc.git
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170 lines
4.6 KiB
C
170 lines
4.6 KiB
C
/* Copyright (C) 2003-2015 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#include <sysdep.h>
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#include <tls.h>
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#ifndef __ASSEMBLER__
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# include <nptl/pthreadP.h>
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#endif
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#if IS_IN (libc) || IS_IN (libpthread) || IS_IN (librt)
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# define _IMM12 #-12
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# define _IMM16 #-16
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# define _IMP16 #16
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# undef PSEUDO
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# define PSEUDO(name, syscall_name, args) \
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.text; \
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ENTRY (name); \
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.Lpseudo_start: \
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SINGLE_THREAD_P; \
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bf .Lpseudo_cancel; \
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.type __##syscall_name##_nocancel,@function; \
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.globl __##syscall_name##_nocancel; \
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__##syscall_name##_nocancel: \
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DO_CALL (syscall_name, args); \
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mov r0,r1; \
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mov _IMM12,r2; \
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shad r2,r1; \
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not r1,r1; \
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tst r1,r1; \
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bt .Lsyscall_error; \
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bra .Lpseudo_end; \
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nop; \
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.size __##syscall_name##_nocancel,.-__##syscall_name##_nocancel; \
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.Lpseudo_cancel: \
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sts.l pr,@-r15; \
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cfi_adjust_cfa_offset (4); \
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cfi_rel_offset (pr, 0); \
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add _IMM16,r15; \
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cfi_adjust_cfa_offset (16); \
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SAVE_ARGS_##args; \
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CENABLE; \
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LOAD_ARGS_##args; \
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add _IMP16,r15; \
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cfi_adjust_cfa_offset (-16); \
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lds.l @r15+,pr; \
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cfi_adjust_cfa_offset (-4); \
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cfi_restore (pr); \
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DO_CALL(syscall_name, args); \
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SYSCALL_INST_PAD; \
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sts.l pr,@-r15; \
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cfi_adjust_cfa_offset (4); \
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cfi_rel_offset (pr, 0); \
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mov.l r0,@-r15; \
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cfi_adjust_cfa_offset (4); \
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cfi_rel_offset (r0, 0); \
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CDISABLE; \
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mov.l @r15+,r0; \
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cfi_adjust_cfa_offset (-4); \
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cfi_restore (r0); \
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lds.l @r15+,pr; \
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cfi_adjust_cfa_offset (-4); \
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cfi_restore (pr); \
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mov r0,r1; \
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mov _IMM12,r2; \
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shad r2,r1; \
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not r1,r1; \
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tst r1,r1; \
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bf .Lpseudo_end; \
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.Lsyscall_error: \
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SYSCALL_ERROR_HANDLER; \
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.Lpseudo_end:
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# undef PSEUDO_END
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# define PSEUDO_END(sym) \
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END (sym)
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# define SAVE_ARGS_0 /* Nothing. */
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# define SAVE_ARGS_1 SAVE_ARGS_0; mov.l r4,@(0,r15); cfi_offset (r4,-4)
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# define SAVE_ARGS_2 SAVE_ARGS_1; mov.l r5,@(4,r15); cfi_offset (r5,-8)
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# define SAVE_ARGS_3 SAVE_ARGS_2; mov.l r6,@(8,r15); cfi_offset (r6,-12)
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# define SAVE_ARGS_4 SAVE_ARGS_3; mov.l r7,@(12,r15); cfi_offset (r7,-16)
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# define SAVE_ARGS_5 SAVE_ARGS_4
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# define SAVE_ARGS_6 SAVE_ARGS_5
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# define LOAD_ARGS_0 /* Nothing. */
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# define LOAD_ARGS_1 LOAD_ARGS_0; mov.l @(0,r15),r4; cfi_restore (r4)
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# define LOAD_ARGS_2 LOAD_ARGS_1; mov.l @(4,r15),r5; cfi_restore (r5)
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# define LOAD_ARGS_3 LOAD_ARGS_2; mov.l @(8,r15),r6; cfi_restore (r6)
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# define LOAD_ARGS_4 LOAD_ARGS_3; mov.l @(12,r15),r7; cfi_restore (r7)
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# define LOAD_ARGS_5 LOAD_ARGS_4
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# define LOAD_ARGS_6 LOAD_ARGS_5
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# if IS_IN (libpthread)
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# define __local_enable_asynccancel __pthread_enable_asynccancel
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# define __local_disable_asynccancel __pthread_disable_asynccancel
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# elif IS_IN (libc)
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# define __local_enable_asynccancel __libc_enable_asynccancel
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# define __local_disable_asynccancel __libc_disable_asynccancel
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# elif IS_IN (librt)
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# define __local_enable_asynccancel __librt_enable_asynccancel
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# define __local_disable_asynccancel __librt_disable_asynccancel
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# else
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# error Unsupported library
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# endif
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# define CENABLE \
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mov.l 1f,r0; \
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bsrf r0; \
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nop; \
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0: bra 2f; \
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mov r0,r2; \
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.align 2; \
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1: .long __local_enable_asynccancel - 0b; \
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2:
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# define CDISABLE \
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mov.l 1f,r0; \
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bsrf r0; \
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mov r2,r4; \
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0: bra 2f; \
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nop; \
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.align 2; \
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1: .long __local_disable_asynccancel - 0b; \
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2:
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# ifndef __ASSEMBLER__
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# define SINGLE_THREAD_P \
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__builtin_expect (THREAD_GETMEM (THREAD_SELF, \
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header.multiple_threads) == 0, 1)
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# else
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# define SINGLE_THREAD_P \
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stc gbr,r0; \
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mov.w 0f,r1; \
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sub r1,r0; \
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mov.l @(MULTIPLE_THREADS_OFFSET,r0),r0; \
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bra 1f; \
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tst r0,r0; \
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0: .word TLS_PRE_TCB_SIZE; \
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1:
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# endif
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#elif !defined __ASSEMBLER__
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# define SINGLE_THREAD_P (1)
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# define NO_CANCELLATION 1
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#endif
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#ifndef __ASSEMBLER__
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# define RTLD_SINGLE_THREAD_P \
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__builtin_expect (THREAD_GETMEM (THREAD_SELF, \
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header.multiple_threads) == 0, 1)
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#endif
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