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[v5,11/22] arc: Fix Race conditions in pthread cancellation [BZ #12683]

Message ID 20230410204614.4129551-3-adhemerval.zanella@linaro.org
State New
Headers show
Series Fix Race conditions in pthread cancellation [BZ#12683] | expand

Commit Message

Adhemerval Zanella Netto April 10, 2023, 8:46 p.m. UTC 
By adding the required syscall_cancel.S.

Checked against a build and make check run-built-tests=no for
arc-linux-gnu, arc-linux-gnuhf, and arceb-linux-gnu.
---
 sysdeps/unix/sysv/linux/arc/syscall_cancel.S | 56 ++++++++++++++++++++
 1 file changed, 56 insertions(+)
 create mode 100644 sysdeps/unix/sysv/linux/arc/syscall_cancel.S
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Patch

diff --git a/sysdeps/unix/sysv/linux/arc/syscall_cancel.S b/sysdeps/unix/sysv/linux/arc/syscall_cancel.S
new file mode 100644
index 0000000000..fa02af4163
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/arc/syscall_cancel.S
@@ -0,0 +1,56 @@ 
+/* Cancellable syscall wrapper.  Linux/ARC 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
+   <http://www.gnu.org/licenses/>.  */
+
+#include <sysdep.h>
+#include <descr-const.h>
+
+/* long int __syscall_cancel_arch (int *cancelhandling,
+				   __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)  */
+
+ENTRY (__syscall_cancel_arch)
+
+	.globl __syscall_cancel_arch_start
+__syscall_cancel_arch_start:
+	ld_s	r12,[r0]
+	bbit1	r12, TCB_CANCELED_BITMASK, 1f
+	mov_s	r8, r1
+	mov_s	r0, r2
+	mov_s	r1, r3
+	mov_s	r2, r4
+	mov_s	r3, r5
+	mov_s	r4, r6
+	mov_s	r5, r7
+	trap_s	0
+
+	.globl __syscall_cancel_arch_end
+__syscall_cancel_arch_end:
+	j_s	[blink]
+
+	.align 4
+1:	push_s	blink
+	cfi_def_cfa_offset (4)
+	cfi_offset (31, -4)
+	bl	@__syscall_do_cancel
+
+END (__syscall_cancel_arch)