5777d565ad
* sysdeps/unix/sysv/linux/s390/s390-32/sysdep-cancel.h (PSEUDO): Also defined symbol for entry point to avoid cancellation. * sysdeps/unix/sysv/linux/s390/s390-64/sysdep-cancel.h (PSEUDO): Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc32/sysdep-cancel.h (PSEUDO): Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc64/sysdep-cancel.h (PSEUDO): Likewise. * sysdeps/unix/sysv/linux/sparc/sparc32/sysdep-cancel.h (PSEUDO): Likewise. * sysdeps/unix/sysv/linux/sparc/sparc64/sysdep-cancel.h (PSEUDO): Likewise. * sysdeps/unix/sysv/linux/i386/not-cancel.h (__open_nocancel, __close_nocancel, __read_nocancel, __write_nocancel, __waitpid_nocancel): Add attribute_hidden. If not in libc.so, libpthread.so or librt.so, define to corresponding function without _nocancel suffix. * sysdeps/unix/sysv/linux/s390/not-cancel.h: New file. * sysdeps/unix/sysv/linux/powerpc/not-cancel.h: New file. * sysdeps/unix/sysv/linux/sparc/not-cancel.h: New file.
116 lines
3.7 KiB
C
116 lines
3.7 KiB
C
/* Copyright (C) 2003 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, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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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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stm %r12,%r15,48(%r15); \
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cfi_offset (%r15, -36); \
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cfi_offset (%r14, -40); \
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cfi_offset (%r13, -44); \
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cfi_offset (%r12, -48); \
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lr %r14,%r15; \
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ahi %r15,-96; \
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cfi_adjust_cfa_offset (96); \
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st %r14,0(%r15); \
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basr %r13,0; \
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0: l %r1,1f-0b(%r13); \
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bas %r14,0(%r1,%r13); \
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lr %r0,%r2; \
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LM_##args \
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DO_CALL(syscall_name, args); \
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l %r1,2f-0b(%r13); \
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lr %r12,%r2; \
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lr %r2,%r0; \
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bas %r14,0(%r1,%r13); \
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lr %r2,%r12; \
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lm %r12,%r15,48+96(%r15); \
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cfi_endproc; \
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j L(pseudo_check); \
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1: .long CENABLE-0b; \
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2: .long CDISABLE-0b; \
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ENTRY(name) \
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SINGLE_THREAD_P(%r1) \
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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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lhi %r4,-4095; \
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clr %r2,%r4; \
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jnl 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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# 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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# 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 st %r2,8(%r15);
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#define STM_2 stm %r2,%r3,8(%r15);
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#define STM_3 stm %r2,%r4,8(%r15);
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#define STM_4 stm %r2,%r5,8(%r15);
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#define STM_5 stm %r2,%r5,8(%r15);
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#define LM_0 /* Nothing */
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#define LM_1 l %r2,8+96(%r15);
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#define LM_2 lm %r2,%r3,8+96(%r15);
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#define LM_3 lm %r2,%r4,8+96(%r15);
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#define LM_4 lm %r2,%r5,8+96(%r15);
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#define LM_5 lm %r2,%r5,8+96(%r15);
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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(reg) \
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ear reg,%a0; \
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icm reg,15,MULTIPLE_THREADS_OFFSET(reg);
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# endif
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#elif !defined __ASSEMBLER__
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/* This code should never be used but we define it anyhow. */
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# define SINGLE_THREAD_P (1)
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#endif
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