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139 lines
4.7 KiB
C
139 lines
4.7 KiB
C
/* Copyright (C) 2010-2016 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Maxim Kuvyrkov <maxim@codesourcery.com>, 2010.
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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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SINGLE_THREAD_P; \
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jne .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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cmp.l &-4095, %d0; \
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jcc SYSCALL_ERROR_LABEL; \
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rts; \
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.size __##syscall_name##_nocancel,.-__##syscall_name##_nocancel; \
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.Lpseudo_cancel: \
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CENABLE; \
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DOCARGS_##args \
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move.l %d0, -(%sp); /* Save result of CENABLE. */ \
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cfi_adjust_cfa_offset (4); \
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move.l &SYS_ify (syscall_name), %d0; \
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trap &0; \
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move.l %d0, %d2; \
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CDISABLE; \
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addq.l &4, %sp; /* Remove result of CENABLE from the stack. */ \
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cfi_adjust_cfa_offset (-4); \
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move.l %d2, %d0; \
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UNDOCARGS_##args \
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cmp.l &-4095, %d0; \
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jcc SYSCALL_ERROR_LABEL
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/* Note: we use D2 to save syscall's return value as D0 will be clobbered in
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CDISABLE. */
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# define DOCARGS_0 move.l %d2, -(%sp); \
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cfi_adjust_cfa_offset (4); cfi_rel_offset (%d2, 0);
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# define UNDOCARGS_0 move.l (%sp)+, %d2; \
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cfi_adjust_cfa_offset (-4); cfi_restore (%d2);
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# define DOCARGS_1 _DOCARGS_1 (4); DOCARGS_0
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# define _DOCARGS_1(n) move.l n(%sp), %d1;
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# define UNDOCARGS_1 UNDOCARGS_0
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# define DOCARGS_2 _DOCARGS_2 (8)
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# define _DOCARGS_2(n) DOCARGS_0 move.l n+4(%sp), %d2; _DOCARGS_1 (n)
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# define UNDOCARGS_2 UNDOCARGS_0
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# define DOCARGS_3 _DOCARGS_3 (12)
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# define _DOCARGS_3(n) move.l %d3, -(%sp); \
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cfi_adjust_cfa_offset (4); cfi_rel_offset (%d3, 0); \
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move.l n+4(%sp), %d3; _DOCARGS_2 (n)
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# define UNDOCARGS_3 UNDOCARGS_2 move.l (%sp)+, %d3; \
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cfi_adjust_cfa_offset (-4); cfi_restore (%d3);
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# define DOCARGS_4 _DOCARGS_4 (16)
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# define _DOCARGS_4(n) move.l %d4, -(%sp); \
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cfi_adjust_cfa_offset (4); cfi_rel_offset (%d4, 0); \
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move.l n+4(%sp), %d4; _DOCARGS_3 (n)
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# define UNDOCARGS_4 UNDOCARGS_3 move.l (%sp)+, %d4; \
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cfi_adjust_cfa_offset (-4); cfi_restore (%d4);
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# define DOCARGS_5 _DOCARGS_5 (20)
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# define _DOCARGS_5(n) move.l %d5, -(%sp); \
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cfi_adjust_cfa_offset (4); cfi_rel_offset (%d5, 0); \
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move.l n+4(%sp), %d5; _DOCARGS_4 (n)
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# define UNDOCARGS_5 UNDOCARGS_4 move.l (%sp)+, %d5; \
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cfi_adjust_cfa_offset (-4); cfi_restore (%d5);
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# define DOCARGS_6 _DOCARGS_6 (24)
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# define _DOCARGS_6(n) move.l n(%sp), %a0; _DOCARGS_5 (n-4)
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# define UNDOCARGS_6 UNDOCARGS_5
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# ifdef PIC
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# define PSEUDO_JMP(sym) jbsr sym ## @PLTPC
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# else
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# define PSEUDO_JMP(sym) jbsr sym
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# endif
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# if IS_IN (libpthread)
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# define CENABLE PSEUDO_JMP (__pthread_enable_asynccancel)
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# define CDISABLE PSEUDO_JMP (__pthread_disable_asynccancel)
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# elif IS_IN (libc)
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# define CENABLE PSEUDO_JMP (__libc_enable_asynccancel)
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# define CDISABLE PSEUDO_JMP (__libc_disable_asynccancel)
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# elif IS_IN (librt)
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# define CENABLE PSEUDO_JMP (__librt_enable_asynccancel)
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# define CDISABLE PSEUDO_JMP (__librt_disable_asynccancel)
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# else
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# error Unsupported library
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# endif
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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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PSEUDO_JMP (__m68k_read_tp); \
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tst.l MULTIPLE_THREADS_OFFSET(%a0)
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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, \
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1)
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#endif
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