From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 1791) id 260D43858401; Tue, 11 Apr 2023 14:18:41 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 260D43858401 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sourceware.org; s=default; t=1681222721; bh=DNL3QDqVNDD+E+4zQ1vTBHYUkipvwfpXDgiUsz6q4GM=; h=From:To:Subject:Date:From; b=sbJv6QHIEQwJAfm22vPc6OrguO79vzsOLwapoqnlnPPBeH2kIffT0PJh4A2Bj75nN YCA8fF5Z9Y+FZCUPyefBnXOSQkp6vXy6Lk16DRcy8HMu3U9Dww3m2N+7pm43VoyBNd Nazrm0f3/ayki1KSoRnj/tR34i3bgh3QBwIld8o0= 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] aarch64: 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: c9c8107f3cda81810e3f1441fdb54695f3a2df90 X-Git-Newrev: 6b46ce14834b37a4557341d25bc267340fafc36d Message-Id: <20230411141841.260D43858401@sourceware.org> Date: Tue, 11 Apr 2023 14:18:41 +0000 (GMT) List-Id: https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=6b46ce14834b37a4557341d25bc267340fafc36d commit 6b46ce14834b37a4557341d25bc267340fafc36d Author: Adhemerval Zanella Date: Sun Apr 2 10:36:03 2023 -0300 aarch64: Fix Race conditions in pthread cancellation [BZ#12683] By adding the required syscall_cancel.S. Checked on aarch64-linux-gnu. Diff: --- sysdeps/unix/sysv/linux/aarch64/syscall_cancel.S | 59 ++++++++++++++++++++++++ 1 file changed, 59 insertions(+) diff --git a/sysdeps/unix/sysv/linux/aarch64/syscall_cancel.S b/sysdeps/unix/sysv/linux/aarch64/syscall_cancel.S new file mode 100644 index 0000000000..e91a431b36 --- /dev/null +++ b/sysdeps/unix/sysv/linux/aarch64/syscall_cancel.S @@ -0,0 +1,59 @@ +/* Cancellable syscall wrapper. Linux/AArch64 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 [x0] __syscall_cancel_arch (int *cancelhandling [x0], + long int nr [x1], + long int arg1 [x2], + long int arg2 [x3], + long int arg3 [x4], + long int arg4 [x5], + long int arg5 [x6], + long int arg6 [x7]) */ + +ENTRY (__syscall_cancel_arch) + + .globl __syscall_cancel_arch_start +__syscall_cancel_arch_start: + + /* if (*cancelhandling & CANCELED_BITMASK) + __syscall_do_cancel() */ + ldr w0, [x0] + tbnz w0, TCB_CANCELED_BIT, 1f + + /* Issue a 6 argument syscall, the nr [x1] being the syscall + number. */ + mov x8, x1 + mov x0, x2 + mov x1, x3 + mov x2, x4 + mov x3, x5 + mov x4, x6 + mov x5, x7 + svc 0x0 + + .globl __syscall_cancel_arch_end +__syscall_cancel_arch_end: + ret + +1: + b __syscall_do_cancel + +END (__syscall_cancel_arch)