mirror of
https://sourceware.org/git/glibc.git
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224 lines
7.7 KiB
C
224 lines
7.7 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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# if IS_IN (libc)
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# define SYSDEP_CANCEL_ERRNO __libc_errno
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# else
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# define SYSDEP_CANCEL_ERRNO errno
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# endif
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# define SYSDEP_CANCEL_ERROR(args) \
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.section .gnu.linkonce.t.__syscall_error_##args, "ax"; \
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.align 32; \
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.proc __syscall_error_##args; \
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.global __syscall_error_##args; \
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.hidden __syscall_error_##args; \
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.size __syscall_error_##args, 64; \
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__syscall_error_##args: \
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.prologue; \
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.regstk args, 5, args, 0; \
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.save ar.pfs, loc0; \
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.save rp, loc1; \
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.body; \
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addl loc4 = @ltoff(@tprel(SYSDEP_CANCEL_ERRNO)), gp;; \
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ld8 loc4 = [loc4]; \
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mov rp = loc1;; \
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mov r8 = -1; \
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add loc4 = loc4, r13;; \
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st4 [loc4] = loc3; \
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mov ar.pfs = loc0
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# ifndef USE_DL_SYSINFO
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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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adds r14 = MULTIPLE_THREADS_OFFSET, r13;; \
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ld4 r14 = [r14]; \
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mov r15 = SYS_ify(syscall_name);; \
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cmp4.ne p6, p7 = 0, r14; \
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(p6) br.cond.spnt .Lpseudo_cancel;; \
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break __BREAK_SYSCALL;; \
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cmp.eq p6,p0=-1,r10; \
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(p6) br.cond.spnt.few __syscall_error; \
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ret;; \
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.endp name; \
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.proc __GC_##name; \
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.globl __GC_##name; \
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.hidden __GC_##name; \
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__GC_##name: \
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.Lpseudo_cancel: \
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.prologue; \
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.regstk args, 5, args, 0; \
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.save ar.pfs, loc0; \
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alloc loc0 = ar.pfs, args, 5, args, 0; \
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.save rp, loc1; \
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mov loc1 = rp;; \
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.body; \
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CENABLE;; \
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mov loc2 = r8; \
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COPY_ARGS_##args \
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mov r15 = SYS_ify(syscall_name); \
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break __BREAK_SYSCALL;; \
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mov loc3 = r8; \
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mov loc4 = r10; \
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mov out0 = loc2; \
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CDISABLE;; \
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cmp.eq p6,p0=-1,loc4; \
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(p6) br.cond.spnt.few __syscall_error_##args; \
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mov r8 = loc3; \
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mov rp = loc1; \
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mov ar.pfs = loc0; \
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.Lpseudo_end: \
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ret; \
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.endp __GC_##name; \
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SYSDEP_CANCEL_ERROR(args)
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# else /* USE_DL_SYSINFO */
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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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.prologue; \
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adds r2 = SYSINFO_OFFSET, r13; \
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adds r14 = MULTIPLE_THREADS_OFFSET, r13; \
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.save ar.pfs, r11; \
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mov r11 = ar.pfs;; \
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.body; \
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ld4 r14 = [r14]; \
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ld8 r2 = [r2]; \
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mov r15 = SYS_ify(syscall_name);; \
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cmp4.ne p6, p7 = 0, r14; \
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mov b7 = r2; \
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(p6) br.cond.spnt .Lpseudo_cancel; \
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br.call.sptk.many b6 = b7;; \
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mov ar.pfs = r11; \
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cmp.eq p6,p0 = -1, r10; \
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(p6) br.cond.spnt.few __syscall_error; \
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ret;; \
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.endp name; \
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\
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.proc __##syscall_name##_nocancel; \
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.globl __##syscall_name##_nocancel; \
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__##syscall_name##_nocancel: \
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.prologue; \
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adds r2 = SYSINFO_OFFSET, r13; \
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.save ar.pfs, r11; \
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mov r11 = ar.pfs;; \
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.body; \
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ld8 r2 = [r2]; \
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mov r15 = SYS_ify(syscall_name);; \
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mov b7 = r2; \
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br.call.sptk.many b6 = b7;; \
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mov ar.pfs = r11; \
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cmp.eq p6,p0 = -1, r10; \
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(p6) br.cond.spnt.few __syscall_error; \
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ret;; \
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.endp __##syscall_name##_nocancel; \
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\
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.proc __GC_##name; \
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.globl __GC_##name; \
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.hidden __GC_##name; \
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__GC_##name: \
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.Lpseudo_cancel: \
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.prologue; \
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.regstk args, 5, args, 0; \
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.save ar.pfs, loc0; \
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alloc loc0 = ar.pfs, args, 5, args, 0; \
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adds loc4 = SYSINFO_OFFSET, r13; \
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.save rp, loc1; \
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mov loc1 = rp;; \
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.body; \
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ld8 loc4 = [loc4]; \
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CENABLE;; \
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mov loc2 = r8; \
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mov b7 = loc4; \
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COPY_ARGS_##args \
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mov r15 = SYS_ify(syscall_name); \
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br.call.sptk.many b6 = b7;; \
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mov loc3 = r8; \
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mov loc4 = r10; \
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mov out0 = loc2; \
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CDISABLE;; \
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cmp.eq p6,p0=-1,loc4; \
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(p6) br.cond.spnt.few __syscall_error_##args; \
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mov r8 = loc3; \
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mov rp = loc1; \
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mov ar.pfs = loc0; \
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.Lpseudo_end: \
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ret; \
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.endp __GC_##name; \
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SYSDEP_CANCEL_ERROR(args)
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# endif /* USE_DL_SYSINFO */
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# undef PSEUDO_END
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# define PSEUDO_END(name) .endp
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# if IS_IN (libpthread)
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# define CENABLE br.call.sptk.many b0 = __pthread_enable_asynccancel
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# define CDISABLE br.call.sptk.many b0 = __pthread_disable_asynccancel
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# elif IS_IN (libc)
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# define CENABLE br.call.sptk.many b0 = __libc_enable_asynccancel
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# define CDISABLE br.call.sptk.many b0 = __libc_disable_asynccancel
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# elif IS_IN (librt)
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# define CENABLE br.call.sptk.many b0 = __librt_enable_asynccancel
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# define CDISABLE br.call.sptk.many b0 = __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 COPY_ARGS_0 /* Nothing */
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# define COPY_ARGS_1 COPY_ARGS_0 mov out0 = in0;
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# define COPY_ARGS_2 COPY_ARGS_1 mov out1 = in1;
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# define COPY_ARGS_3 COPY_ARGS_2 mov out2 = in2;
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# define COPY_ARGS_4 COPY_ARGS_3 mov out3 = in3;
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# define COPY_ARGS_5 COPY_ARGS_4 mov out4 = in4;
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# define COPY_ARGS_6 COPY_ARGS_5 mov out5 = in5;
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# define COPY_ARGS_7 COPY_ARGS_6 mov out6 = in6;
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# ifndef __ASSEMBLER__
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# define SINGLE_THREAD_P \
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__builtin_expect (THREAD_GETMEM (THREAD_SELF, header.multiple_threads) == 0, 1)
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# else
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# define SINGLE_THREAD_P \
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adds r14 = MULTIPLE_THREADS_OFFSET, r13 ;; ld4 r14 = [r14] ;; cmp4.ne p6, p7 = 0, r14
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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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