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https://sourceware.org/git/glibc.git
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248 lines
6.3 KiB
C
248 lines
6.3 KiB
C
/* Copyright (C) 2003, 2004 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, 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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# 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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.LCFI0: \
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add _IMM16,r15; \
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SAVE_ARGS_##args; \
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.LCFI1: \
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CENABLE; \
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LOAD_ARGS_##args; \
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add _IMP16,r15; \
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.LCFI2: \
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lds.l @r15+,pr; \
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.LCFI3: \
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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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.LCFI4: \
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mov.l r0,@-r15; \
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.LCFI5: \
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CDISABLE; \
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mov.l @r15+,r0; \
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.LCFI6: \
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lds.l @r15+,pr; \
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.LCFI7: \
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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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/* Create unwinding information for the syscall wrapper. */ \
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.section .eh_frame,"a",@progbits; \
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.Lframe1: \
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.ualong .LECIE1-.LSCIE1; \
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.LSCIE1: \
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.ualong 0x0; \
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.byte 0x1; \
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AUGMENTATION_STRING; \
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.uleb128 0x1; \
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.sleb128 -4; \
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.byte 0x11; \
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AUGMENTATION_PARAM; \
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.byte 0xc; \
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.uleb128 0xf; \
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.uleb128 0x0; \
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.align 2; \
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.LECIE1: \
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.LSFDE1: \
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.ualong .LEFDE1-.LASFDE1; \
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.LASFDE1: \
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.ualong .LASFDE1-.Lframe1; \
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START_SYMBOL_REF; \
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.ualong .Lpseudo_end - .Lpseudo_start; \
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AUGMENTATION_PARAM_FDE; \
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.byte 0x4; \
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.ualong .LCFI0-.Lpseudo_start; \
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.byte 0xe; \
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.uleb128 0x4; \
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.byte 0x91; \
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.uleb128 0x1; \
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.byte 0x4; \
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.ualong .LCFI1-.LCFI0; \
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.byte 0xe; \
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.uleb128 0x14; \
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FRAME_REG_##args; \
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.byte 0x4; \
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.ualong .LCFI2-.LCFI1; \
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.byte 0xe; \
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.uleb128 0x4; \
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.byte 0x4; \
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.ualong .LCFI3-.LCFI2; \
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.byte 0xe; \
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.uleb128 0x0; \
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.byte 0xd1; \
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.byte 0x4; \
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.ualong .LCFI4-.LCFI3; \
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.byte 0xe; \
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.uleb128 0x4; \
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.byte 0x91; \
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.uleb128 0x1; \
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.byte 0x4; \
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.ualong .LCFI5-.LCFI4; \
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.byte 0xe; \
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.uleb128 0x8; \
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.byte 0x80; \
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.uleb128 0x2; \
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.byte 0x4; \
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.ualong .LCFI6-.LCFI5; \
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.byte 0xe; \
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.uleb128 0x4; \
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.byte 0xc0; \
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.byte 0x4; \
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.ualong .LCFI7-.LCFI6; \
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.byte 0xe; \
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.uleb128 0x0; \
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.byte 0xd1; \
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.align 2; \
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.LEFDE1: \
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.previous
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# ifdef SHARED
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# define AUGMENTATION_STRING .string "zR"
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# define AUGMENTATION_PARAM .uleb128 1; .byte 0x1b
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# define AUGMENTATION_PARAM_FDE .uleb128 0
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# define START_SYMBOL_REF .long .Lpseudo_start-.
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# else
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# define AUGMENTATION_STRING .ascii "\0"
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# define AUGMENTATION_PARAM
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# define AUGMENTATION_PARAM_FDE
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# define START_SYMBOL_REF .long .Lpseudo_start
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# endif
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# define FRAME_REG_0 /* Nothing. */
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# define FRAME_REG_1 FRAME_REG_0; .byte 0x84; .uleb128 5
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# define FRAME_REG_2 FRAME_REG_1; .byte 0x85; .uleb128 4
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# define FRAME_REG_3 FRAME_REG_2; .byte 0x86; .uleb128 3
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# define FRAME_REG_4 FRAME_REG_3; .byte 0x87; .uleb128 2
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# define FRAME_REG_5 FRAME_REG_4
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# define FRAME_REG_6 FRAME_REG_5
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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)
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# define SAVE_ARGS_2 SAVE_ARGS_1; mov.l r5,@(4,r15)
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# define SAVE_ARGS_3 SAVE_ARGS_2; mov.l r6,@(8,r15)
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# define SAVE_ARGS_4 SAVE_ARGS_3; mov.l r7,@(12,r15)
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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
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# define LOAD_ARGS_2 LOAD_ARGS_1; mov.l @(4,r15),r5
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# define LOAD_ARGS_3 LOAD_ARGS_2; mov.l @(8,r15),r6
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# define LOAD_ARGS_4 LOAD_ARGS_3; mov.l @(12,r15),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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# ifdef 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 !defined NOT_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 defined 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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