From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 1791) id B809D3858433; Fri, 7 Apr 2023 17:08:36 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org B809D3858433 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sourceware.org; s=default; t=1680887316; bh=sLz88q5q3aW9WrEYLGQ9GNRLPaJUbpCex6CxjnTUIbg=; h=From:To:Subject:Date:From; b=rN910AlXxu8v21jJRqekrg3U/Ra2IEj5i5ooUJi8GfLzXypkkCCufEABE9PVjhhLl zEeB31rQIUWEDwC7zxr3TZxfI6IAmeLu1qZZjJUwvn8TDEl4+FlNslgeeGlJON6kkp c460uSbi6Fb8kaKUCvjt7mXKTgnoMLmB9VfwKGNg= Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit From: Adhemerval Zanella To: glibc-cvs@sourceware.org Subject: [glibc/azanella/bz12683] alpha: Fix Race conditions in pthread cancellation [BZ#12683] X-Act-Checkin: glibc X-Git-Author: Adhemerval Zanella X-Git-Refname: refs/heads/azanella/bz12683 X-Git-Oldrev: 9d79c2a2a0283a76636ba894bdc0072c041341d7 X-Git-Newrev: f4780c0e074ab3164229a07eac708cf34fe0bd08 Message-Id: <20230407170836.B809D3858433@sourceware.org> Date: Fri, 7 Apr 2023 17:08:36 +0000 (GMT) List-Id: https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=f4780c0e074ab3164229a07eac708cf34fe0bd08 commit f4780c0e074ab3164229a07eac708cf34fe0bd08 Author: Adhemerval Zanella Date: Mon Apr 3 11:29:12 2023 -0300 alpha: Fix Race conditions in pthread cancellation [BZ#12683] By adding the required syscall_cancel.S. Checked on alpha-linux-gnu. Diff: --- sysdeps/unix/sysv/linux/alpha/syscall_cancel.S | 80 ++++++++++++++++++++++++++ 1 file changed, 80 insertions(+) diff --git a/sysdeps/unix/sysv/linux/alpha/syscall_cancel.S b/sysdeps/unix/sysv/linux/alpha/syscall_cancel.S new file mode 100644 index 0000000000..377eef48be --- /dev/null +++ b/sysdeps/unix/sysv/linux/alpha/syscall_cancel.S @@ -0,0 +1,80 @@ +/* Cancellable syscall wrapper. Linux/alpha version. + Copyright (C) 2023 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + . */ + +#include +#include + +/* long int __syscall_cancel_arch (int *ch, + __syscall_arg_t nr, + __syscall_arg_t arg1, + __syscall_arg_t arg2, + __syscall_arg_t arg3, + __syscall_arg_t arg4, + __syscall_arg_t arg5, + __syscall_arg_t arg6) */ + + .set noreorder + .set noat + .set nomacro +ENTRY (__syscall_cancel_arch) + .frame sp, 16, ra, 0 + .mask 0x4000000,-16 + cfi_startproc + ldah gp, 0(t12) + lda gp, 0(gp) + lda sp, -16(sp) + cfi_def_cfa_offset (16) + mov a1, v0 + stq ra, 0(sp) + cfi_offset (26, -16) + .prologue 1 + + .global __syscall_cancel_arch_start +__syscall_cancel_arch_start: + ldl t0, 0(a0) + addl zero, t0, t0 + /* if (*ch & CANCELED_BITMASK) */ + and t0, TCB_CANCELED_BITMASK, t0 + bne t0, 1f + mov a2, a0 + mov a3, a1 + mov a4, a2 + ldq a4, 16(sp) + mov a5, a3 + ldq a5, 24(sp) + .set macro + callsys + .set nomacro + + .global __syscall_cancel_arch_end +__syscall_cancel_arch_end: + subq zero, v0, t0 + ldq ra, 0(sp) + cmovne a3, t0, v0 + lda sp, 16(sp) + cfi_remember_state + cfi_restore (26) + cfi_def_cfa_offset (0) + ret zero, (ra), 1 + .align 4 +1: + cfi_restore_state + ldq t12, __syscall_do_cancel(gp) !literal!2 + jsr ra, (t12), __syscall_do_cancel !lituse_jsr!2 + cfi_endproc +END (__syscall_cancel_arch)