public inbox for glibc-cvs@sourceware.org
help / color / mirror / Atom feed
* [glibc/azanella/pthread-multiple-fixes] nptl: microblaze: Fix Race conditions in pthread cancellation [BZ#12683]
@ 2021-06-08 20:49 Adhemerval Zanella
0 siblings, 0 replies; only message in thread
From: Adhemerval Zanella @ 2021-06-08 20:49 UTC (permalink / raw)
To: glibc-cvs
https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=6af4e1d54ffc37a0a1ccbc59b902200cf2b6c373
commit 6af4e1d54ffc37a0a1ccbc59b902200cf2b6c373
Author: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Date: Mon Jan 16 17:02:17 2017 -0200
nptl: microblaze: Fix Race conditions in pthread cancellation [BZ#12683]
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.
Diff:
---
sysdeps/microblaze/nptl/tcb-offsets.sym | 3 ++
sysdeps/unix/sysv/linux/alpha/syscall_cancel.S | 2 +-
.../unix/sysv/linux/microblaze/syscall_cancel.S | 61 ++++++++++++++++++++++
sysdeps/unix/sysv/linux/microblaze/sysdep.h | 1 +
4 files changed, 66 insertions(+), 1 deletion(-)
diff --git a/sysdeps/microblaze/nptl/tcb-offsets.sym b/sysdeps/microblaze/nptl/tcb-offsets.sym
index 614f0dfed6..bb39e23d57 100644
--- a/sysdeps/microblaze/nptl/tcb-offsets.sym
+++ b/sysdeps/microblaze/nptl/tcb-offsets.sym
@@ -8,3 +8,6 @@
MULTIPLE_THREADS_OFFSET thread_offsetof (header.multiple_threads)
TID_OFFSET thread_offsetof (tid)
+
+-- Not strictly offsets, used on syscall_cancel.S
+TCB_CANCELED_BITMASK CANCELED_BITMASK
diff --git a/sysdeps/unix/sysv/linux/alpha/syscall_cancel.S b/sysdeps/unix/sysv/linux/alpha/syscall_cancel.S
index e3726688fb..c3a57122ed 100644
--- a/sysdeps/unix/sysv/linux/alpha/syscall_cancel.S
+++ b/sysdeps/unix/sysv/linux/alpha/syscall_cancel.S
@@ -74,7 +74,7 @@ __syscall_cancel_arch_end:
1:
cfi_restore_state
ldq t12, __do_cancel(gp) !literal!2
- jsr ra, (t12), __cancel !lituse_jsr!2
+ jsr ra, (t12), __do_cancel !lituse_jsr!2
cfi_endproc
END (__syscall_cancel_arch)
libc_hidden_def (__syscall_cancel_arch)
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..087a786443
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/microblaze/syscall_cancel.S
@@ -0,0 +1,61 @@
+/* Cancellable syscall wrapper. Linux/microblaze version.
+ Copyright (C) 2020 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
+__syscall_cancel_arch_start:
+
+ lwi r3,r5,0
+ andi r3,r3,TCB_CANCELED_BITMASK
+ 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
+__syscall_cancel_arch_end:
+
+ nop
+ lwi r15,r1,0
+ rtsd r15,8
+ addik r1,r1,28
+
+1:
+ brlid r15, __do_cancel
+ nop
+
+END (__syscall_cancel_arch)
+libc_hidden_def (__syscall_cancel_arch)
diff --git a/sysdeps/unix/sysv/linux/microblaze/sysdep.h b/sysdeps/unix/sysv/linux/microblaze/sysdep.h
index 52c1e3d8d0..f7c7aa7013 100644
--- a/sysdeps/unix/sysv/linux/microblaze/sysdep.h
+++ b/sysdeps/unix/sysv/linux/microblaze/sysdep.h
@@ -22,6 +22,7 @@
#include <sysdeps/unix/sysdep.h>
#include <sysdeps/unix/sysv/linux/sysdep.h>
#include <sysdeps/microblaze/sysdep.h>
+#include <tls.h>
/* Defines RTLD_PRIVATE_ERRNO. */
#include <dl-sysdep.h>
^ permalink raw reply [flat|nested] only message in thread
only message in thread, other threads:[~2021-06-08 20:49 UTC | newest]
Thread overview: (only message) (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2021-06-08 20:49 [glibc/azanella/pthread-multiple-fixes] nptl: microblaze: Fix Race conditions in pthread cancellation [BZ#12683] Adhemerval Zanella
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).