From: Arnd Bergmann <arnd@arndb.de>
To: y2038@lists.linaro.org, linux-kernel@vger.kernel.org
Cc: Arnd Bergmann <arnd@arndb.de>,
linux-api@vger.kernel.org, linux-arch@vger.kernel.org,
libc-alpha@sourceware.org, tglx@linutronix.de,
netdev@vger.kernel.org, deepa.kernel@gmail.com,
viro@zeniv.linux.org.uk, albert.aribaud@3adev.fr,
Peter Zijlstra <peterz@infradead.org>,
Darren Hart <dvhart@infradead.org>,
"Eric W. Biederman" <ebiederm@xmission.com>,
Dominik Brodowski <linux@dominikbrodowski.net>
Subject: [PATCH 17/17] y2038: signal: Add compat_sys_rt_sigtimedwait_time64
Date: Wed, 25 Apr 2018 18:03:11 +0200 [thread overview]
Message-ID: <20180425160311.2718314-18-arnd@arndb.de> (raw)
In-Reply-To: <20180425160311.2718314-1-arnd@arndb.de>
Now that 32-bit architectures have two variants of
sys_rt_sigtimedwaid() for 32-bit and 64-bit time_t, we also
need to have a second compat system call entry point on the
corresponding 64-bit architectures.
The traditional system call keeps getting handled
by compat_sys_rt_sigtimedwait(), and this adds a new
compat_sys_rt_sigtimedwait_time64() that differs only in
the timeout argument type.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
kernel/signal.c | 32 ++++++++++++++++++++++++++++++++
1 file changed, 32 insertions(+)
diff --git a/kernel/signal.c b/kernel/signal.c
index 72609c6835fd..1927fcfa7077 100644
--- a/kernel/signal.c
+++ b/kernel/signal.c
@@ -3249,6 +3249,38 @@ COMPAT_SYSCALL_DEFINE4(rt_sigtimedwait, compat_sigset_t __user *, uthese,
}
#endif
+#ifdef CONFIG_COMPAT
+COMPAT_SYSCALL_DEFINE4(rt_sigtimedwait_time64, compat_sigset_t __user *, uthese,
+ struct compat_siginfo __user *, uinfo,
+ struct __kernel_timespec __user *, uts, compat_size_t, sigsetsize)
+{
+ sigset_t s;
+ struct timespec64 t;
+ siginfo_t info;
+ long ret;
+
+ if (sigsetsize != sizeof(sigset_t))
+ return -EINVAL;
+
+ if (get_compat_sigset(&s, uthese))
+ return -EFAULT;
+
+ if (uts) {
+ if (get_timespec64(&t, uts))
+ return -EFAULT;
+ }
+
+ ret = do_sigtimedwait(&s, &info, uts ? &t : NULL);
+
+ if (ret > 0 && uinfo) {
+ if (copy_siginfo_to_user32(uinfo, &info))
+ ret = -EFAULT;
+ }
+
+ return ret;
+}
+#endif
+
/**
* sys_kill - send a signal to a process
* @pid: the PID of the process
--
2.9.0
prev parent reply other threads:[~2018-04-25 16:04 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-04-25 16:02 [PATCH 00/17] y2038: system calls, part 3 Arnd Bergmann
2018-04-25 16:02 ` [PATCH 01/17] y2038: compat: Move common compat types to asm-generic/compat.h Arnd Bergmann
2018-04-25 16:02 ` [PATCH 02/17] y2038: Remove newstat family from default syscall set Arnd Bergmann
2018-04-25 18:36 ` Geert Uytterhoeven
2018-04-25 16:02 ` [PATCH 03/17] y2038: Remove stat64 " Arnd Bergmann
2018-04-25 16:02 ` [PATCH 04/17] asm-generic: Remove unneeded __ARCH_WANT_SYS_LLSEEK macro Arnd Bergmann
2018-04-25 18:36 ` Geert Uytterhoeven
2018-04-25 16:02 ` [PATCH 05/17] asm-generic: Remove empty asm/unistd.h Arnd Bergmann
2018-04-25 16:03 ` [PATCH 06/17] y2038: Change sys_utimensat() to use __kernel_timespec Arnd Bergmann
2018-04-25 16:03 ` [PATCH 07/17] y2038: Compile utimes()/futimesat() conditionally Arnd Bergmann
2018-04-25 16:03 ` [PATCH 08/17] y2038: utimes: Rework #ifdef guards for compat syscalls Arnd Bergmann
2018-04-25 16:03 ` [PATCH 09/17] y2038: futex: Move compat implementation into futex.c Arnd Bergmann
2018-04-25 16:03 ` [PATCH 10/17] y2038: futex: Add support for __kernel_timespec Arnd Bergmann
2018-04-25 16:03 ` [PATCH 11/17] y2038: Prepare sched_rr_get_interval " Arnd Bergmann
2018-04-25 16:03 ` [PATCH 12/17] y2038: aio: Prepare sys_io_getevents " Arnd Bergmann
2018-04-25 16:03 ` [PATCH 13/17] y2038: socket: Convert recvmmsg to __kernel_timespec Arnd Bergmann
2018-04-25 16:03 ` [PATCH 14/17] y2038: socket: Add compat_sys_recvmmsg_time64 Arnd Bergmann
2018-04-25 16:03 ` [PATCH 15/17] y2038: signal: Change rt_sigtimedwait to use __kernel_timespec Arnd Bergmann
2018-04-25 16:03 ` [PATCH 16/17] y2038: Make compat_sys_rt_sigtimedwait usable on 32-bit Arnd Bergmann
2018-04-25 16:03 ` Arnd Bergmann [this message]
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