[glibc/azanella/bz12683] riscv: Fix Race conditions in pthread cancellation [BZ#12683]

[glibc/azanella/bz12683] riscv: Fix Race conditions in pthread cancellation [BZ#12683]

[Adhemerval Zanella]

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=fb620d28035829115518e889db77920f7a82d8fd

commit fb620d28035829115518e889db77920f7a82d8fd
Author: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Date:   Mon Apr 3 10:57:49 2023 -0300

    riscv: Fix Race conditions in pthread cancellation [BZ#12683]
    
    By adding the required syscall_cancel.S.
    
    Reviewed-by: Andrew Waterman <aswaterman@gmail.com>

Diff:
---
 sysdeps/unix/sysv/linux/riscv/syscall_cancel.S | 67 ++++++++++++++++++++++++++
 1 file changed, 67 insertions(+)

diff --git a/sysdeps/unix/sysv/linux/riscv/syscall_cancel.S b/sysdeps/unix/sysv/linux/riscv/syscall_cancel.S
new file mode 100644
index 0000000000..742c748d09
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/riscv/syscall_cancel.S
@@ -0,0 +1,67 @@
+/* Cancellable syscall wrapper.  Linux/riscv 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)  */
+
+#ifdef SHARED
+	.option pic
+#else
+	.option nopic
+#endif
+
+ENTRY (__syscall_cancel_arch)
+
+	.globl __syscall_cancel_arch_start
+__syscall_cancel_arch_start:
+	lw	t1, 0(a0)
+	/* if (*ch & CANCELED_BITMASK)  */
+	andi	t1, t1, TCB_CANCELED_BITMASK
+	bne	t1, zero, 1f
+
+	mv	t3, a1
+	mv	a0, a2
+	mv	a1, a3
+	mv	a2, a4
+	mv	a3, a5
+	mv	a4, a6
+	mv	a5, a7
+	mv	a7, t3
+	scall
+
+	.globl __syscall_cancel_arch_end
+__syscall_cancel_arch_end:
+	ret
+
+1:
+	addi	sp, sp, -16
+	cfi_def_cfa_offset (16)
+	REG_S	ra, (16-SZREG)(sp)
+	cfi_offset (ra, -SZREG)
+	call	__syscall_do_cancel
+
+END (__syscall_cancel_arch)

[glibc/azanella/bz12683] riscv: Fix Race conditions in pthread cancellation [BZ#12683]

[Adhemerval Zanella]

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=0e9567f22fdd4b2319f01dc5f32238acdcefd5f6

commit 0e9567f22fdd4b2319f01dc5f32238acdcefd5f6
Author: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Date:   Mon Apr 3 10:57:49 2023 -0300

    riscv: Fix Race conditions in pthread cancellation [BZ#12683]
    
    By adding the required syscall_cancel.S.
    
    Reviewed-by: Andrew Waterman <aswaterman@gmail.com>

Diff:
---
 sysdeps/unix/sysv/linux/riscv/syscall_cancel.S | 67 ++++++++++++++++++++++++++
 1 file changed, 67 insertions(+)

diff --git a/sysdeps/unix/sysv/linux/riscv/syscall_cancel.S b/sysdeps/unix/sysv/linux/riscv/syscall_cancel.S
new file mode 100644
index 0000000000..742c748d09
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/riscv/syscall_cancel.S
@@ -0,0 +1,67 @@
+/* Cancellable syscall wrapper.  Linux/riscv 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)  */
+
+#ifdef SHARED
+	.option pic
+#else
+	.option nopic
+#endif
+
+ENTRY (__syscall_cancel_arch)
+
+	.globl __syscall_cancel_arch_start
+__syscall_cancel_arch_start:
+	lw	t1, 0(a0)
+	/* if (*ch & CANCELED_BITMASK)  */
+	andi	t1, t1, TCB_CANCELED_BITMASK
+	bne	t1, zero, 1f
+
+	mv	t3, a1
+	mv	a0, a2
+	mv	a1, a3
+	mv	a2, a4
+	mv	a3, a5
+	mv	a4, a6
+	mv	a5, a7
+	mv	a7, t3
+	scall
+
+	.globl __syscall_cancel_arch_end
+__syscall_cancel_arch_end:
+	ret
+
+1:
+	addi	sp, sp, -16
+	cfi_def_cfa_offset (16)
+	REG_S	ra, (16-SZREG)(sp)
+	cfi_offset (ra, -SZREG)
+	call	__syscall_do_cancel
+
+END (__syscall_cancel_arch)