Patchwork [v3,11/21] nptl: microblaze: Fix Race conditions in pthread cancellation (BZ#12683)

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Submitter Adhemerval Zanella Netto
Date Oct. 14, 2019, 8:56 p.m.
Message ID <20191014205656.29834-12-adhemerval.zanella@linaro.org>
Download mbox | patch
Permalink /patch/34964/
State New
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Adhemerval Zanella Netto - Oct. 14, 2019, 8:56 p.m.
This patch adds the microblaze modifications required for the BZ#12683 fix
by adding the arch-specific cancellation syscall bridge.

Checked against a build and make check run-built-tests=no for
microblaze-linux-gnu.
---
 .../sysv/linux/microblaze/syscall_cancel.S    | 64 +++++++++++++++++++
 1 file changed, 64 insertions(+)
 create mode 100644 sysdeps/unix/sysv/linux/microblaze/syscall_cancel.S

Patch

diff --git a/sysdeps/unix/sysv/linux/microblaze/syscall_cancel.S b/sysdeps/unix/sysv/linux/microblaze/syscall_cancel.S
new file mode 100644
index 0000000000..19f566ba61
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/microblaze/syscall_cancel.S
@@ -0,0 +1,64 @@ 
+/* Cancellable syscall wrapper.  Linux/microblaze version.
+   Copyright (C) 2019 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
+   <http://www.gnu.org/licenses/>.  */
+
+#include <sysdep.h>
+
+/* long int __syscall_cancel_arch (int *cancelhandling,
+				   long int nr,
+				   long int arg1,
+				   long int arg2,
+				   long int arg3,
+				   long int arg4,
+				   long int arg5,
+				   long int arg6)  */
+
+ENTRY (__syscall_cancel_arch)
+
+	.globl __syscall_cancel_arch_start
+	.type  __syscall_cancel_arch_start, @function
+__syscall_cancel_arch_start:
+
+	lwi	r3,r5,0
+	andi	r3,r3,4 #and1
+	bneid	r3,1f
+	addk	r12,r6,r0
+
+	addk	r5,r7,r0
+	addk	r6,r8,r0
+	addk	r7,r9,r0
+	addk	r8,r10,r0
+	lwi	r9,r1,56
+	lwi	r10,r1,60
+	brki	r14,8
+
+	.globl __syscall_cancel_arch_end
+	.type  __syscall_cancel_arch_end, @function
+__syscall_cancel_arch_end:
+
+	nop
+	lwi	r15,r1,0
+	rtsd	r15,8
+	addik	r1,r1,28
+
+1:
+	brlid	r15, __syscall_do_cancel
+	nop
+
+END (__syscall_cancel_arch)
+libc_hidden_def (__syscall_cancel_arch)
+