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linux-user/syscall: Add support for clock_gettime64/clock_settime64

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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>
Message-Id: <4a7fd05532400d10aa0f684c9043e2ac7b34d91c.1584051142.git.alistair.francis@wdc.com>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
This commit is contained in:
Alistair Francis 2020-03-12 15:13:53 -07:00 committed by Laurent Vivier
parent 859e8a89be
commit c6c8d1026e
1 changed files with 39 additions and 0 deletions
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39
linux-user/syscall.c
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@ -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:
{