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authorErik de Castro Lopo <erikd@mega-nerd.com>2013-11-29 18:39:23 +1100
committerRiku Voipio <riku.voipio@linaro.org>2013-11-29 10:58:16 +0200
commitf4f1e10a58cb5ec7806d47d20671e668a52c3e70 (patch)
tree5bf111bfb3433a0a21f5e5811df0e77268ebb730 /linux-user
parent905bba13ca292cb8c83fe5ccdf8a95bd04168bb1 (diff)
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linux-user: Implement handling of 5 POSIX timer syscalls.
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>
Diffstat (limited to 'linux-user')
-rw-r--r--linux-user/syscall.c176
1 files changed, 176 insertions, 0 deletions
diff --git a/linux-user/syscall.c b/linux-user/syscall.c
index eaaf00d..e0c832d 100644
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -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);