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Diffstat (limited to 'arch/um/os-Linux/skas/process.c')
-rw-r--r--arch/um/os-Linux/skas/process.c27
1 files changed, 23 insertions, 4 deletions
diff --git a/arch/um/os-Linux/skas/process.c b/arch/um/os-Linux/skas/process.c
index 0036164bb0fb..3e64814e888e 100644
--- a/arch/um/os-Linux/skas/process.c
+++ b/arch/um/os-Linux/skas/process.c
@@ -287,10 +287,18 @@ int start_userspace(unsigned long stub_stack)
void userspace(struct uml_pt_regs *regs)
{
+ struct itimerval timer;
+ unsigned long long nsecs, now;
int err, status, op, pid = userspace_pid[0];
/* To prevent races if using_sysemu changes under us.*/
int local_using_sysemu;
+ if (getitimer(ITIMER_VIRTUAL, &timer))
+ printk("Failed to get itimer, errno = %d\n", errno);
+ nsecs = timer.it_value.tv_sec * BILLION +
+ timer.it_value.tv_usec * 1000;
+ nsecs += os_nsecs();
+
while (1) {
restore_registers(pid, regs);
@@ -333,8 +341,18 @@ void userspace(struct uml_pt_regs *regs)
case SIGTRAP:
relay_signal(SIGTRAP, regs);
break;
- case SIGIO:
case SIGVTALRM:
+ now = os_nsecs();
+ if(now < nsecs)
+ break;
+ block_signals();
+ (*sig_info[sig])(sig, regs);
+ unblock_signals();
+ nsecs = timer.it_value.tv_sec * BILLION +
+ timer.it_value.tv_usec * 1000;
+ nsecs += os_nsecs();
+ break;
+ case SIGIO:
case SIGILL:
case SIGBUS:
case SIGFPE:
@@ -378,6 +396,7 @@ __initcall(init_thread_regs);
int copy_context_skas0(unsigned long new_stack, int pid)
{
+ struct timeval tv = { .tv_sec = 0, .tv_usec = 1000000 / UM_HZ };
int err;
unsigned long current_stack = current_stub_stack();
struct stub_data *data = (struct stub_data *) current_stack;
@@ -392,9 +411,9 @@ int copy_context_skas0(unsigned long new_stack, int pid)
*data = ((struct stub_data) { .offset = MMAP_OFFSET(new_offset),
.fd = new_fd,
.timer = ((struct itimerval)
- { { 0, 1000000 / UM_HZ },
- { 0, 1000000 / UM_HZ }})
- });
+ { .it_value = tv,
+ .it_interval = tv }) });
+
err = ptrace_setregs(pid, thread_regs);
if (err < 0)
panic("copy_context_skas0 : PTRACE_SETREGS failed, "