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https://sourceware.org/git/glibc.git
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153 lines
4.7 KiB
C
153 lines
4.7 KiB
C
/* Copyright (C) 2003, 2004, 2006 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Jakub Jelinek <jakub@redhat.com>, 2003.
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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 !defined NOT_IN_libc || defined IS_IN_libpthread || defined IS_IN_librt
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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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L(pseudo_cancel): \
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cfi_startproc; \
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STM_##args \
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stmg %r13,%r15,104(%r15); \
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cfi_offset (%r15,-40); \
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cfi_offset (%r14,-48); \
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cfi_offset (%r13,-56); \
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lgr %r14,%r15; \
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aghi %r15,-160; \
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cfi_adjust_cfa_offset (160); \
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stg %r14,0(%r15); \
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brasl %r14,CENABLE; \
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lgr %r0,%r2; \
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LM_##args \
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.if SYS_ify (syscall_name) < 256; \
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svc SYS_ify (syscall_name); \
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.else; \
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lghi %r1,SYS_ify (syscall_name); \
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svc 0; \
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.endif; \
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LR7_##args \
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lgr %r13,%r2; \
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lgr %r2,%r0; \
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brasl %r14,CDISABLE; \
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lgr %r2,%r13; \
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lmg %r13,%r15,104+160(%r15); \
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cfi_endproc; \
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j L(pseudo_check); \
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ENTRY(name) \
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SINGLE_THREAD_P \
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jne L(pseudo_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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L(pseudo_check): \
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lghi %r4,-4095; \
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clgr %r2,%r4; \
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jgnl SYSCALL_ERROR_LABEL; \
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.size __##syscall_name##_nocancel,.-__##syscall_name##_nocancel; \
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L(pseudo_end):
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# ifdef IS_IN_libpthread
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# define CENABLE __pthread_enable_asynccancel
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# define CDISABLE __pthread_disable_asynccancel
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# define __local_multiple_threads __pthread_multiple_threads
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# elif !defined NOT_IN_libc
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# define CENABLE __libc_enable_asynccancel
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# define CDISABLE __libc_disable_asynccancel
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# define __local_multiple_threads __libc_multiple_threads
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# elif defined IS_IN_librt
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# define CENABLE __librt_enable_asynccancel
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# define CDISABLE __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 STM_0 /* Nothing */
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#define STM_1 stg %r2,16(%r15);
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#define STM_2 stmg %r2,%r3,16(%r15);
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#define STM_3 stmg %r2,%r4,16(%r15);
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#define STM_4 stmg %r2,%r5,16(%r15);
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#define STM_5 stmg %r2,%r5,16(%r15);
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#define STM_6 stmg %r2,%r7,16(%r15);
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#define LM_0 /* Nothing */
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#define LM_1 lg %r2,16+160(%r15);
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#define LM_2 lmg %r2,%r3,16+160(%r15);
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#define LM_3 lmg %r2,%r4,16+160(%r15);
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#define LM_4 lmg %r2,%r5,16+160(%r15);
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#define LM_5 lmg %r2,%r5,16+160(%r15);
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#define LM_6 lmg %r2,%r5,16+160(%r15); \
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cfi_offset (%r7, -104); \
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lg %r7,160+160(%r15);
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#define LR7_0 /* Nothing */
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#define LR7_1 /* Nothing */
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#define LR7_2 /* Nothing */
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#define LR7_3 /* Nothing */
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#define LR7_4 /* Nothing */
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#define LR7_5 /* Nothing */
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#define LR7_6 lg %r7,56+160(%r15); \
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cfi_restore (%r7);
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# if defined IS_IN_libpthread || !defined NOT_IN_libc
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# ifndef __ASSEMBLER__
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extern int __local_multiple_threads attribute_hidden;
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# define SINGLE_THREAD_P \
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__builtin_expect (__local_multiple_threads == 0, 1)
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# else
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# define SINGLE_THREAD_P \
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larl %r1,__local_multiple_threads; \
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icm %r0,15,0(%r1);
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# endif
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# else
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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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ear %r1,%a0; \
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sllg %r1,%r1,32; \
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ear %r1,%a1; \
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icm %r1,15,MULTIPLE_THREADS_OFFSET(%r1);
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# endif
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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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