From: Adhemerval Zanella <adhemerval.zanella@linaro.org>
To: libc-alpha@sourceware.org
Subject: [PATCH v3 19/21] nptl: nios2: Fix Race conditions in pthread cancellation (BZ#12683)
Date: Mon, 14 Oct 2019 20:57:00 -0000 [thread overview]
Message-ID: <20191014205656.29834-20-adhemerval.zanella@linaro.org> (raw)
In-Reply-To: <20191014205656.29834-1-adhemerval.zanella@linaro.org>
This patch adds the nios2 modifications required for the BZ#12683 fix
by adding the arch-specific cancellation syscall bridge.
---
.../unix/sysv/linux/nios2/syscall_cancel.S | 97 +++++++++++++++++++
1 file changed, 97 insertions(+)
create mode 100644 sysdeps/unix/sysv/linux/nios2/syscall_cancel.S
diff --git a/sysdeps/unix/sysv/linux/nios2/syscall_cancel.S b/sysdeps/unix/sysv/linux/nios2/syscall_cancel.S
new file mode 100644
index 0000000000..cc19c4525e
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/nios2/syscall_cancel.S
@@ -0,0 +1,97 @@
+/* Cancellable syscall wrapper. Linux/nios2 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,
+ __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)
+#ifdef SHARED
+ addi sp, sp, -8
+ stw r22, 0(sp)
+ nextpc r22
+1:
+ movhi r8, %hiadj(_gp_got - 1b)
+ addi r8, r8, %lo(_gp_got - 1b)
+ stw ra, 4(sp)
+ add r22, r22, r8
+#else
+ addi sp, sp, -4
+ cfi_def_cfa_offset (4)
+ stw ra, 0(sp)
+ cfi_offset (31, -4)
+#endif
+
+ .globl __syscall_cancel_arch_start
+ .type __syscall_cancel_arch_start,@function
+__syscall_cancel_arch_start:
+ ldw r3, 0(r4)
+ andi r3, r3, 4
+ bne r3, zero, 3f
+ mov r10, r6
+ mov r2, r5
+#ifdef SHARED
+# define STACK_ADJ 4
+#else
+# define STACK_ADJ 0
+#endif
+ ldw r9, (16 + STACK_ADJ)(sp)
+ mov r5, r7
+ ldw r8, (12 + STACK_ADJ)(sp)
+ ldw r7, (8 + STACK_ADJ)(sp)
+ ldw r6, (4 + STACK_ADJ)(sp)
+ mov r4, r10
+ trap
+
+ .globl __syscall_cancel_arch_end
+ .type __syscall_cancel_arch_end,@function
+__syscall_cancel_arch_end:
+ beq r7, zero, 2f
+ sub r2, zero, r2
+2:
+#ifdef SHARED
+ ldw ra, 4(sp)
+ ldw r22, 0(sp)
+ addi sp, sp, 8
+#else
+ ldw ra, (0 + STACK_ADJ)(sp)
+ cfi_remember_state
+ cfi_restore (31)
+ addi sp, sp, 4
+ cfi_def_cfa_offset (0)
+#endif
+ ret
+
+3:
+#ifdef SHARED
+ ldw r2, %call(__syscall_do_cancel)(r22)
+ callr r2
+#else
+ cfi_restore_state
+ call __syscall_do_cancel
+#endif
+
+END (__syscall_cancel_arch)
+libc_hidden_def (__syscall_cancel_arch)
--
2.17.1
next prev parent reply other threads:[~2019-10-14 20:57 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-10-14 20:57 [PATCH v3 00/21] nptl: " Adhemerval Zanella
2019-10-14 20:57 ` [PATCH v3 07/21] nptl: i386: " Adhemerval Zanella
2019-10-14 20:57 ` [PATCH v3 16/21] nptl: sh: " Adhemerval Zanella
2019-10-14 20:57 ` [PATCH v3 13/21] nptl: hppa: " Adhemerval Zanella
2019-10-14 20:57 ` [PATCH v3 10/21] nptl: powerpc: " Adhemerval Zanella
2019-10-14 20:57 ` [PATCH v3 14/21] nptl: m68k: " Adhemerval Zanella
2019-10-14 21:13 ` Andreas Schwab
2019-10-14 20:57 ` [PATCH v3 17/21] nptl: riscv: " Adhemerval Zanella
2019-10-14 23:22 ` Andrew Waterman
2019-10-14 20:57 ` [PATCH v3 02/21] nptl: " Adhemerval Zanella
2019-10-15 10:56 ` Florian Weimer
2019-10-16 20:42 ` Adhemerval Zanella
2019-10-18 12:38 ` Internal SIGTIMER use (was: Re: [PATCH v3 02/21] nptl: Fix Race conditions in pthread cancellation (BZ#12683)) Florian Weimer
2019-10-21 13:29 ` Adhemerval Zanella
2019-10-14 20:57 ` [PATCH v3 05/21] nptl: ia64: Fix Race conditions in pthread cancellation (BZ#12683) Adhemerval Zanella
2019-10-14 20:57 ` [PATCH v3 06/21] nptl: mips: " Adhemerval Zanella
2019-10-14 20:57 ` [PATCH v3 09/21] nptl: arm: " Adhemerval Zanella
2019-10-14 20:57 ` [PATCH v3 08/21] nptl: aarch64: " Adhemerval Zanella
2019-10-14 20:57 ` [PATCH v3 18/21] nptl: s390: " Adhemerval Zanella
2019-10-16 15:46 ` Stefan Liebler
2019-10-17 13:54 ` Adhemerval Zanella
2019-10-17 15:01 ` Stefan Liebler
2019-10-17 19:46 ` Adhemerval Zanella
2019-10-18 12:58 ` Stefan Liebler
2019-10-14 20:57 ` Adhemerval Zanella [this message]
2019-10-14 20:57 ` [PATCH v3 03/21] nptl: x86_64: " Adhemerval Zanella
2019-10-15 11:03 ` Florian Weimer
2019-10-16 21:22 ` Adhemerval Zanella
2019-10-14 20:57 ` [PATCH v3 01/21] nptl: Handle EPIPE on tst-cancel2 Adhemerval Zanella
2019-10-15 9:03 ` Florian Weimer
2019-10-14 20:57 ` [PATCH v3 12/21] nptl: sparc: Fix Race conditions in pthread cancellation (BZ#12683) Adhemerval Zanella
2019-10-14 20:57 ` [PATCH v3 11/21] nptl: microblaze: " Adhemerval Zanella
2019-10-14 20:57 ` [PATCH v3 04/21] nptl: x32: " Adhemerval Zanella
2019-10-15 11:06 ` Florian Weimer
2019-10-14 20:57 ` [PATCH v3 15/21] nptl: alpha: " Adhemerval Zanella
2019-10-17 3:01 ` Matt Turner
2019-10-14 20:57 ` [PATCH v3 20/21] nptl: csky: " Adhemerval Zanella
2019-10-14 20:58 ` [PATCH v3 21/21] Remove sysdep-cancel header Adhemerval Zanella
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20191014205656.29834-20-adhemerval.zanella@linaro.org \
--to=adhemerval.zanella@linaro.org \
--cc=libc-alpha@sourceware.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).