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linux-user: Implement handling of 5 POSIX timer syscalls.

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Implement timer_create, timer_settime, timer_gettime, timer_getoverrun
and timer_delete.

Signed-off-by: Erik de Castro Lopo <erikd@mega-nerd.com>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
This commit is contained in:
Erik de Castro Lopo 2013-11-29 18:39:23 +11:00 committed by Riku Voipio
parent 905bba13ca
commit f4f1e10a58
1 changed files with 176 additions and 0 deletions
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176
linux-user/syscall.c
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@ -428,6 +428,25 @@ _syscall4(int, sys_prlimit64, pid_t, pid, int, resource,
struct host_rlimit64 *, old_limit)
#endif
#if defined(TARGET_NR_timer_create)
/* Maxiumum of 32 active POSIX timers allowed at any one time. */
static timer_t g_posix_timers[32] = { 0, } ;
static inline int next_free_host_timer(void)
{
int k ;
/* FIXME: Does finding the next free slot require a lock? */
for (k = 0; k < ARRAY_SIZE(g_posix_timers); k++) {
if (g_posix_timers[k] == 0) {
g_posix_timers[k] = (timer_t) 1;
return k;
}
}
return -1;
}
#endif
/* ARM EABI and MIPS expect 64bit types aligned even on pairs or registers */
#ifdef TARGET_ARM
static inline int regpairs_aligned(void *cpu_env) {
@ -4838,6 +4857,45 @@ static inline abi_long host_to_target_timespec(abi_ulong target_addr,
return 0;
}
static inline abi_long target_to_host_itimerspec(struct itimerspec *host_itspec,
abi_ulong target_addr)
{
struct target_itimerspec *target_itspec;
if (!lock_user_struct(VERIFY_READ, target_itspec, target_addr, 1)) {
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;
}
static inline abi_long host_to_target_itimerspec(abi_ulong target_addr,
struct itimerspec *host_its)
{
struct target_itimerspec *target_itspec;
if (!lock_user_struct(VERIFY_WRITE, target_itspec, target_addr, 0)) {
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;
}
#if defined(TARGET_NR_stat64) || defined(TARGET_NR_newfstatat)
static inline abi_long host_to_target_stat64(void *cpu_env,
abi_ulong target_addr,
@ -9195,6 +9253,124 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1,
break;
}
#endif
#ifdef TARGET_NR_timer_create
case TARGET_NR_timer_create:
{
/* args: clockid_t clockid, struct sigevent *sevp, timer_t *timerid */
struct sigevent host_sevp = { {0}, }, *phost_sevp = NULL;
struct target_sigevent *ptarget_sevp;
struct target_timer_t *ptarget_timer;
int clkid = arg1;
int timer_index = next_free_host_timer();
if (timer_index < 0) {
ret = -TARGET_EAGAIN;
} else {
timer_t *phtimer = g_posix_timers + timer_index;
if (arg2) {
if (!lock_user_struct(VERIFY_READ, ptarget_sevp, arg2, 1)) {
goto efault;
}
host_sevp.sigev_signo = tswap32(ptarget_sevp->sigev_signo);
host_sevp.sigev_notify = tswap32(ptarget_sevp->sigev_notify);
phost_sevp = &host_sevp;
}
ret = get_errno(timer_create(clkid, phost_sevp, phtimer));
if (ret) {
phtimer = NULL;
} else {
if (!lock_user_struct(VERIFY_WRITE, ptarget_timer, arg3, 1)) {
goto efault;
}
ptarget_timer->ptr = tswap32(0xcafe0000 | timer_index);
unlock_user_struct(ptarget_timer, arg3, 1);
}
}
break;
}
#endif
#ifdef TARGET_NR_timer_settime
case TARGET_NR_timer_settime:
{
/* args: timer_t timerid, int flags, const struct itimerspec *new_value,
* struct itimerspec * old_value */
arg1 &= 0xffff;
if (arg3 == 0 || arg1 < 0 || arg1 >= ARRAY_SIZE(g_posix_timers)) {
ret = -TARGET_EINVAL;
} else {
timer_t htimer = g_posix_timers[arg1];
struct itimerspec hspec_new = {{0},}, hspec_old = {{0},};
target_to_host_itimerspec(&hspec_new, arg3);
ret = get_errno(
timer_settime(htimer, arg2, &hspec_new, &hspec_old));
host_to_target_itimerspec(arg2, &hspec_old);
}
break;
}
#endif
#ifdef TARGET_NR_timer_gettime
case TARGET_NR_timer_gettime:
{
/* args: timer_t timerid, struct itimerspec *curr_value */
arg1 &= 0xffff;
if (!arg2) {
return -TARGET_EFAULT;
} else if (arg1 < 0 || arg1 >= ARRAY_SIZE(g_posix_timers)) {
ret = -TARGET_EINVAL;
} else {
timer_t htimer = g_posix_timers[arg1];
struct itimerspec hspec;
ret = get_errno(timer_gettime(htimer, &hspec));
if (host_to_target_itimerspec(arg2, &hspec)) {
ret = -TARGET_EFAULT;
}
}
break;
}
#endif
#ifdef TARGET_NR_timer_getoverrun
case TARGET_NR_timer_getoverrun:
{
/* args: timer_t timerid */
arg1 &= 0xffff;
if (arg1 < 0 || arg1 >= ARRAY_SIZE(g_posix_timers)) {
ret = -TARGET_EINVAL;
} else {
timer_t htimer = g_posix_timers[arg1];
ret = get_errno(timer_getoverrun(htimer));
}
break;
}
#endif
#ifdef TARGET_NR_timer_delete
case TARGET_NR_timer_delete:
{
/* args: timer_t timerid */
arg1 &= 0xffff;
if (arg1 < 0 || arg1 >= ARRAY_SIZE(g_posix_timers)) {
ret = -TARGET_EINVAL;
} else {
timer_t htimer = g_posix_timers[arg1];
ret = get_errno(timer_delete(htimer));
g_posix_timers[arg1] = 0;
}
break;
}
#endif
default:
unimplemented:
gemu_log("qemu: Unsupported syscall: %d\n", num);