From: Adhemerval Zanella <adhemerval.zanella@linaro.org>
To: libc-alpha@sourceware.org
Subject: [PATCH v2 08/21] nptl: aarch64: Fix Race conditions in pthread cancellation (BZ#12683)
Date: Mon, 26 Feb 2018 18:03:23 -0300 [thread overview]
Message-ID: <1519679016-12241-9-git-send-email-adhemerval.zanella@linaro.org> (raw)
In-Reply-To: <1519679016-12241-1-git-send-email-adhemerval.zanella@linaro.org>
This patch adds the aarch64 modifications required for the BZ#12683.
It basically adds the required ucontext_get_pc function.
The built cancelable syscall wrapper for aarch64 using GCC 7.2.1 and
default configuration flags shows an expected optimized version:
---
__GI___syscall_cancel_arch:
.LFB38:
.cfi_startproc
.global __syscall_cancel_arch_start
.type __syscall_cancel_arch_start,@function
__syscall_cancel_arch_start:
ldr w9, [x0]
tbnz x9, 2, .L7
mov x8, x1
mov x0, x2
mov x1, x3
mov x2, x4
mov x3, x5
mov x4, x6
mov x5, x7
svc 0 // syscall nr
.global __syscall_cancel_arch_end
.type __syscall_cancel_arch_end,@function
__syscall_cancel_arch_end:
ret
---
A similar code is obtained with GCC 5.3.1, so I see to need to provide
an arch-specific syscall_cancel.S for aarch64.
Checked on aarch64-linux-gnu.
[BZ #12683]
* sysdeps/unix/sysv/linux/aarch64/sysdep-cancel.h (PSEUDO): Redefine
to call __syscall_cancel function for cancellable syscalls.
(__pthread_get_ip): Add implementation.
* sysdeps/unix/sysv/linux/aarch64/sysdep.h (SYSCALL_CANCEL_ERROR): Add
definition.
(SYSCALL_CANCEL_ERRNO): Likewise.
---
ChangeLog | 4 ++++
sysdeps/unix/sysv/linux/aarch64/sigcontextinfo.h | 11 +++++++++++
2 files changed, 15 insertions(+)
diff --git a/sysdeps/unix/sysv/linux/aarch64/sigcontextinfo.h b/sysdeps/unix/sysv/linux/aarch64/sigcontextinfo.h
index 04596ef..d9822dc 100644
--- a/sysdeps/unix/sysv/linux/aarch64/sigcontextinfo.h
+++ b/sysdeps/unix/sysv/linux/aarch64/sigcontextinfo.h
@@ -16,6 +16,9 @@
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
+#ifndef _SIGCONTEXTINFO_H
+#define _SIGCONTEXTINFO_H
+
#include <stdint.h>
#include <sys/ucontext.h>
@@ -33,3 +36,11 @@
(act)->sa_flags |= SA_SIGINFO; \
(sigaction) (sig, act, oact); \
})
+
+static inline uintptr_t
+ucontext_get_pc (const ucontext_t *uc)
+{
+ return uc->uc_mcontext.pc;
+}
+
+#endif
--
2.7.4
next prev parent reply other threads:[~2018-02-26 21:03 UTC|newest]
Thread overview: 45+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-02-26 21:03 [PATCH v2 00/21] nptl: Fix Race conditions in pthread cancellation (BZ#12683) Adhemerval Zanella
2018-02-26 21:03 ` [PATCH v2 01/21] powerpc: Create stackframe information on syscall Adhemerval Zanella
2018-02-26 21:41 ` Andreas Schwab
2018-02-27 12:05 ` Adhemerval Zanella
2018-05-07 2:49 ` Zack Weinberg
2018-05-07 13:57 ` Adhemerval Zanella
2018-02-26 21:03 ` [PATCH v2 02/21] nptl: Fix testcases for new pthread cancellation mechanism Adhemerval Zanella
2018-02-26 21:43 ` Andreas Schwab
2018-02-27 12:05 ` Adhemerval Zanella
2018-05-07 2:49 ` Zack Weinberg
2018-05-07 17:13 ` Adhemerval Zanella
2018-05-08 13:35 ` Zack Weinberg
2018-05-08 17:26 ` Adhemerval Zanella
2018-02-26 21:03 ` [PATCH v2 03/21] nptl: Fix Race conditions in pthread cancellation (BZ#12683) Adhemerval Zanella
2018-04-27 12:20 ` Zack Weinberg
2018-04-27 12:25 ` Adhemerval Zanella
2018-05-07 2:48 ` Zack Weinberg
2018-05-07 2:49 ` Zack Weinberg
2018-05-08 17:11 ` Adhemerval Zanella
2018-02-26 21:03 ` [PATCH v2 04/21] nptl: x86_64: " Adhemerval Zanella
2018-05-07 2:49 ` Zack Weinberg
2018-05-08 17:55 ` Adhemerval Zanella
2018-02-26 21:03 ` [PATCH v2 05/21] nptl: x32: " Adhemerval Zanella
2018-02-26 21:03 ` [PATCH v2 06/21] nptl: i386: " Adhemerval Zanella
2018-05-07 2:49 ` Zack Weinberg
2018-05-08 17:56 ` Adhemerval Zanella
2018-02-26 21:03 ` [PATCH v2 07/21] nptl: powerpc: " Adhemerval Zanella
2018-05-07 19:25 ` Tulio Magno Quites Machado Filho
2018-05-08 18:07 ` Adhemerval Zanella
2018-02-26 21:03 ` Adhemerval Zanella [this message]
2018-02-26 21:03 ` [PATCH v2 09/21] nptl: arm: " Adhemerval Zanella
2018-02-26 21:03 ` [PATCH v2 10/21] nptl: s390: " Adhemerval Zanella
2018-02-26 21:03 ` [PATCH v2 11/21] nptl: ia64: " Adhemerval Zanella
2018-02-26 21:03 ` [PATCH v2 12/21] nptl: alpha: " Adhemerval Zanella
2018-02-26 21:03 ` [PATCH v2 13/21] nptl: m68k: " Adhemerval Zanella
2018-02-26 21:03 ` [PATCH v2 14/21] nptl: microblaze: " Adhemerval Zanella
2018-02-26 21:03 ` [PATCH v2 15/21] nptl: tile: " Adhemerval Zanella
2018-02-26 21:03 ` [PATCH v2 16/21] nptl: sparc: " Adhemerval Zanella
2018-02-26 21:03 ` [PATCH v2 17/21] nptl: nios2: " Adhemerval Zanella
2018-02-26 21:03 ` [PATCH v2 18/21] nptl: sh: " Adhemerval Zanella
2018-02-26 21:03 ` [PATCH v2 19/21] nptl: mips: " Adhemerval Zanella
2018-02-26 21:03 ` [PATCH v2 20/21] nptl: hppa: " Adhemerval Zanella
2018-02-26 21:03 ` [PATCH v2 21/21] nptl: riscv: " Adhemerval Zanella
2018-02-27 1:16 ` DJ Delorie
2018-02-27 13:03 ` 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
List information: https://www.gnu.org/software/libc/involved.html
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1519679016-12241-9-git-send-email-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).