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154 lines
5.3 KiB
C
154 lines
5.3 KiB
C
/* Copyright (C) 2002-2016 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>, 2002.
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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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# 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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cmpl $0, %gs:MULTIPLE_THREADS_OFFSET; \
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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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cmpl $-4095, %eax; \
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jae SYSCALL_ERROR_LABEL; \
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ret; \
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.size __##syscall_name##_nocancel,.-__##syscall_name##_nocancel; \
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L(pseudo_cancel): \
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CENABLE \
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SAVE_OLDTYPE_##args \
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PUSHCARGS_##args \
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DOCARGS_##args \
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movl $SYS_ify (syscall_name), %eax; \
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ENTER_KERNEL; \
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POPCARGS_##args; \
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POPSTATE_##args \
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cmpl $-4095, %eax; \
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jae SYSCALL_ERROR_LABEL
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# define SAVE_OLDTYPE_0 movl %eax, %ecx;
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# define SAVE_OLDTYPE_1 SAVE_OLDTYPE_0
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# define SAVE_OLDTYPE_2 pushl %eax; cfi_adjust_cfa_offset (4);
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# define SAVE_OLDTYPE_3 SAVE_OLDTYPE_2
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# define SAVE_OLDTYPE_4 SAVE_OLDTYPE_2
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# define SAVE_OLDTYPE_5 SAVE_OLDTYPE_2
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# define SAVE_OLDTYPE_6 SAVE_OLDTYPE_2
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# define PUSHCARGS_0 /* No arguments to push. */
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# define DOCARGS_0 /* No arguments to frob. */
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# define POPCARGS_0 /* No arguments to pop. */
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# define _PUSHCARGS_0 /* No arguments to push. */
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# define _POPCARGS_0 /* No arguments to pop. */
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# define PUSHCARGS_1 movl %ebx, %edx; cfi_register (ebx, edx); PUSHCARGS_0
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# define DOCARGS_1 _DOARGS_1 (4)
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# define POPCARGS_1 POPCARGS_0; movl %edx, %ebx; cfi_restore (ebx);
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# define _PUSHCARGS_1 pushl %ebx; cfi_adjust_cfa_offset (4); \
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cfi_rel_offset (ebx, 0); _PUSHCARGS_0
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# define _POPCARGS_1 _POPCARGS_0; popl %ebx; \
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cfi_adjust_cfa_offset (-4); cfi_restore (ebx);
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# define PUSHCARGS_2 PUSHCARGS_1
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# define DOCARGS_2 _DOARGS_2 (12)
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# define POPCARGS_2 POPCARGS_1
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# define _PUSHCARGS_2 _PUSHCARGS_1
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# define _POPCARGS_2 _POPCARGS_1
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# define PUSHCARGS_3 _PUSHCARGS_2
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# define DOCARGS_3 _DOARGS_3 (20)
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# define POPCARGS_3 _POPCARGS_3
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# define _PUSHCARGS_3 _PUSHCARGS_2
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# define _POPCARGS_3 _POPCARGS_2
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# define PUSHCARGS_4 _PUSHCARGS_4
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# define DOCARGS_4 _DOARGS_4 (28)
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# define POPCARGS_4 _POPCARGS_4
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# define _PUSHCARGS_4 pushl %esi; cfi_adjust_cfa_offset (4); \
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cfi_rel_offset (esi, 0); _PUSHCARGS_3
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# define _POPCARGS_4 _POPCARGS_3; popl %esi; \
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cfi_adjust_cfa_offset (-4); cfi_restore (esi);
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# define PUSHCARGS_5 _PUSHCARGS_5
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# define DOCARGS_5 _DOARGS_5 (36)
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# define POPCARGS_5 _POPCARGS_5
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# define _PUSHCARGS_5 pushl %edi; cfi_adjust_cfa_offset (4); \
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cfi_rel_offset (edi, 0); _PUSHCARGS_4
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# define _POPCARGS_5 _POPCARGS_4; popl %edi; \
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cfi_adjust_cfa_offset (-4); cfi_restore (edi);
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# define PUSHCARGS_6 _PUSHCARGS_6
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# define DOCARGS_6 _DOARGS_6 (44)
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# define POPCARGS_6 _POPCARGS_6
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# define _PUSHCARGS_6 pushl %ebp; cfi_adjust_cfa_offset (4); \
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cfi_rel_offset (ebp, 0); _PUSHCARGS_5
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# define _POPCARGS_6 _POPCARGS_5; popl %ebp; \
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cfi_adjust_cfa_offset (-4); cfi_restore (ebp);
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# if IS_IN (libpthread)
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# define CENABLE call __pthread_enable_asynccancel;
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# define CDISABLE call __pthread_disable_asynccancel
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# elif IS_IN (libc)
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# define CENABLE call __libc_enable_asynccancel;
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# define CDISABLE call __libc_disable_asynccancel
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# elif IS_IN (librt)
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# define CENABLE call __librt_enable_asynccancel;
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# define CDISABLE call __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 POPSTATE_0 \
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pushl %eax; cfi_adjust_cfa_offset (4); movl %ecx, %eax; \
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CDISABLE; popl %eax; cfi_adjust_cfa_offset (-4);
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# define POPSTATE_1 POPSTATE_0
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# define POPSTATE_2 xchgl (%esp), %eax; CDISABLE; popl %eax; \
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cfi_adjust_cfa_offset (-4);
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# define POPSTATE_3 POPSTATE_2
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# define POPSTATE_4 POPSTATE_3
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# define POPSTATE_5 POPSTATE_4
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# define POPSTATE_6 POPSTATE_5
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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 cmpl $0, %gs:MULTIPLE_THREADS_OFFSET
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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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