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[PATCH 1/2] linux-user: Modify 'target_to_host/host_to_target_itimerspec
From: |
Filip Bozuta |
Subject: |
[PATCH 1/2] linux-user: Modify 'target_to_host/host_to_target_itimerspec()' |
Date: |
Wed, 22 Jul 2020 13:10:23 +0200 |
Functions 'target_to_host_itimerspec()' and 'host_to_target_itimerspec()'
are used to convert values of type 'struct itimerspec' between target and
host. This type has 'struct timespec' as its fields. That is the reason
why this patch introduces a little modification to the converting functions
to be implemented using already existing functions that convert 'struct
timespec':
'target_to_host_timespec()' and 'host_to_target_timespec()'. This makes the
code of 'target_to_host_itimerspec()' and 'host_to_target_itimerspec()' more
clean and readable.
Signed-off-by: Filip Bozuta <Filip.Bozuta@syrmia.com>
---
linux-user/syscall.c | 38 ++++++++++++--------------------------
1 file changed, 12 insertions(+), 26 deletions(-)
diff --git a/linux-user/syscall.c b/linux-user/syscall.c
index 1211e759c2..17e09c3cd3 100644
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -1236,7 +1236,9 @@ static inline abi_long copy_to_user_timeval64(abi_ulong
target_tv_addr,
defined(TARGET_NR_nanosleep) || defined(TARGET_NR_clock_settime) || \
defined(TARGET_NR_utimensat) || defined(TARGET_NR_mq_timedsend) || \
defined(TARGET_NR_mq_timedreceive) || defined(TARGET_NR_ipc) || \
- defined(TARGET_NR_semop) || defined(TARGET_NR_semtimedop)
+ defined(TARGET_NR_semop) || defined(TARGET_NR_semtimedop) || \
+ defined(TARGET_NR_timer_settime) || \
+ (defined(TARGET_NR_timerfd_settime) && defined(CONFIG_TIMERFD))
static inline abi_long target_to_host_timespec(struct timespec *host_ts,
abi_ulong target_addr)
{
@@ -6790,46 +6792,30 @@ static inline abi_long target_ftruncate64(void
*cpu_env, abi_long arg1,
#if defined(TARGET_NR_timer_settime) || \
(defined(TARGET_NR_timerfd_settime) && defined(CONFIG_TIMERFD))
-static inline abi_long target_to_host_itimerspec(struct itimerspec
*host_itspec,
+static inline abi_long target_to_host_itimerspec(struct itimerspec *host_its,
abi_ulong target_addr)
{
- struct target_itimerspec *target_itspec;
-
- if (!lock_user_struct(VERIFY_READ, target_itspec, target_addr, 1)) {
+ if (target_to_host_timespec(&host_its->it_interval, target_addr) ||
+ target_to_host_timespec(&host_its->it_value, target_addr +
+ sizeof(struct target_timespec))) {
return -TARGET_EFAULT;
}
- host_itspec->it_interval.tv_sec =
- tswapal(target_itspec->it_interval.tv_sec);
- host_itspec->it_interval.tv_nsec =
- tswapal(target_itspec->it_interval.tv_nsec);
- host_itspec->it_value.tv_sec = tswapal(target_itspec->it_value.tv_sec);
- host_itspec->it_value.tv_nsec = tswapal(target_itspec->it_value.tv_nsec);
-
- unlock_user_struct(target_itspec, target_addr, 1);
return 0;
}
#endif
#if ((defined(TARGET_NR_timerfd_gettime) || \
defined(TARGET_NR_timerfd_settime)) && defined(CONFIG_TIMERFD)) || \
- defined(TARGET_NR_timer_gettime) || defined(TARGET_NR_timer_settime)
+ defined(TARGET_NR_timer_gettime) || defined(TARGET_NR_timer_settime)
static inline abi_long host_to_target_itimerspec(abi_ulong target_addr,
- struct itimerspec *host_its)
+ struct itimerspec *host_its)
{
- struct target_itimerspec *target_itspec;
-
- if (!lock_user_struct(VERIFY_WRITE, target_itspec, target_addr, 0)) {
+ if (host_to_target_timespec(target_addr, &host_its->it_interval) ||
+ host_to_target_timespec(target_addr + sizeof(struct target_timespec),
+ &host_its->it_value)) {
return -TARGET_EFAULT;
}
-
- target_itspec->it_interval.tv_sec = tswapal(host_its->it_interval.tv_sec);
- target_itspec->it_interval.tv_nsec =
tswapal(host_its->it_interval.tv_nsec);
-
- target_itspec->it_value.tv_sec = tswapal(host_its->it_value.tv_sec);
- target_itspec->it_value.tv_nsec = tswapal(host_its->it_value.tv_nsec);
-
- unlock_user_struct(target_itspec, target_addr, 0);
return 0;
}
#endif
--
2.25.1