From: Alistair Francis <alistair.francis@wdc.com>
To: qemu-devel@nongnu.org, qemu-riscv@nongnu.org, laurent@vivier.eu
Cc: alistair.francis@wdc.com, palmer@dabbelt.com, alistair23@gmail.com
Subject: [PATCH v9 2/4] linux-user/syscall: Add support for clock_gettime64/clock_settime64
Date: Wed, 18 Mar 2020 15:46:58 -0700 [thread overview]
Message-ID: <56b8fd28a0faca77ee8adfc90e4eb2bc3750edf5.1584571250.git.alistair.francis@wdc.com> (raw)
In-Reply-To: <cover.1584571250.git.alistair.francis@wdc.com>
Add support for the clock_gettime64/clock_settime64 syscalls.
If your host is 64-bit or is 32-bit with the *_time64 syscall then the
timespec will correctly be a 64-bit time_t. Otherwise the host will
return a 32-bit time_t which will be rounded to 64-bits. This will be
incorrect after y2038.
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
---
linux-user/syscall.c | 39 +++++++++++++++++++++++++++++++++++++++
1 file changed, 39 insertions(+)
diff --git a/linux-user/syscall.c b/linux-user/syscall.c
index 909bec94a5..60fd775d9c 100644
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -1229,6 +1229,22 @@ static inline abi_long target_to_host_timespec(struct timespec *host_ts,
}
#endif
+#if defined(TARGET_NR_clock_settime64)
+static inline abi_long target_to_host_timespec64(struct timespec *host_ts,
+ abi_ulong target_addr)
+{
+ struct target__kernel_timespec *target_ts;
+
+ if (!lock_user_struct(VERIFY_READ, target_ts, target_addr, 1)) {
+ return -TARGET_EFAULT;
+ }
+ __get_user(host_ts->tv_sec, &target_ts->tv_sec);
+ __get_user(host_ts->tv_nsec, &target_ts->tv_nsec);
+ unlock_user_struct(target_ts, target_addr, 0);
+ return 0;
+}
+#endif
+
static inline abi_long host_to_target_timespec(abi_ulong target_addr,
struct timespec *host_ts)
{
@@ -11458,6 +11474,18 @@ static abi_long do_syscall1(void *cpu_env, int num, abi_long arg1,
return ret;
}
#endif
+#ifdef TARGET_NR_clock_settime64
+ case TARGET_NR_clock_settime64:
+ {
+ struct timespec ts;
+
+ ret = target_to_host_timespec64(&ts, arg2);
+ if (!is_error(ret)) {
+ ret = get_errno(clock_settime(arg1, &ts));
+ }
+ return ret;
+ }
+#endif
#ifdef TARGET_NR_clock_gettime
case TARGET_NR_clock_gettime:
{
@@ -11469,6 +11497,17 @@ static abi_long do_syscall1(void *cpu_env, int num, abi_long arg1,
return ret;
}
#endif
+#ifdef TARGET_NR_clock_gettime64
+ case TARGET_NR_clock_gettime64:
+ {
+ struct timespec ts;
+ ret = get_errno(clock_gettime(arg1, &ts));
+ if (!is_error(ret)) {
+ ret = host_to_target_timespec64(arg2, &ts);
+ }
+ return ret;
+ }
+#endif
#ifdef TARGET_NR_clock_getres
case TARGET_NR_clock_getres:
{
--
2.25.1
next prev parent reply other threads:[~2020-03-18 22:55 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-03-18 22:46 [PATCH v9 0/4] linux-user: generate syscall_nr.sh for RISC-V Alistair Francis
2020-03-18 22:46 ` [PATCH v9 1/4] linux-user: Protect more syscalls Alistair Francis
2020-03-18 23:32 ` Philippe Mathieu-Daudé
2020-03-18 22:46 ` Alistair Francis [this message]
2020-03-18 23:36 ` [PATCH v9 2/4] linux-user/syscall: Add support for clock_gettime64/clock_settime64 Philippe Mathieu-Daudé
2020-03-18 22:47 ` [PATCH v9 3/4] linux-user: Support futex_time64 Alistair Francis
2020-03-25 17:41 ` Alistair Francis
2020-03-26 6:22 ` Laurent Vivier
2020-03-26 16:46 ` Alistair Francis
2020-03-18 22:47 ` [PATCH v9 4/4] linux-user/riscv: Update the syscall_nr's to the 5.5 kernel Alistair Francis
2020-03-19 0:39 ` [PATCH v9 0/4] linux-user: generate syscall_nr.sh for RISC-V no-reply
2020-03-19 1:13 ` no-reply
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