Hi Anna,
I have found the problem - SP for a newly created thread was wrong.
Thanks you,
Leonid
From: Anna.Lyons@data61.csiro.au
Sent: Tuesday, August 7, 2018 7:39 PM
To: Leonid Meyerovich ; devel@sel4.systems
Subject: Re: sel4 thread creation problem
Hi Leonid,
It looks like you haven't set the cspace guard correctly in the new tcb, which means that cptr look ups will fail.
This should fix it:
- error = seL4_TCB_Configure(tcb_object.cptr, , seL4_NilData, cspace_cap, seL4_NilData, pd_cap, seL4_NilData, ipc_buffer, ipc_page);
+ seL4_Word guard = seL4_CNode_CapData_new(0, seL4_WordBits - simple_get_cnode_size_bits(&penv->simple).words[0]);
+ error = seL4_TCB_Configure(tcb_object.cptr, , seL4_NilData, cspace_cap, guard, pd_cap, seL4_NilData, ipc_buffer, ipc_page);
Cheers,
Anna.
________________________________
From: Devel mailto:devel-bounces@sel4.systems> on behalf of Leonid Meyerovich mailto:lmeyerovich@i-a-i.com>
Sent: Wednesday, 8 August 2018 1:47 AM
To: devel@sel4.systemsmailto:devel@sel4.systems
Subject: [seL4] sel4 thread creation problem
Hello,
My platform is ARM (zynqmp), seL4 v8. I have created a timer in simple initial thread:
int err;
seL4_timer_t timer;
vka_object_t ntfn_object;
ntfn_object.cptr = 0;
err = vka_alloc_notification(&_env.vka, &ntfn_object);
assert(err == 0);
err = sel4platsupport_init_default_timer(&_env.vka, &_env.vspace, &_env.simple, ntfn_object.cptr, &timer);
err = ltimer_set_timeout(&timer.ltimer, NS_IN_MS * 20, TIMEOUT_PERIODIC);
assert(err == 0);
int count = 0;
int count_s = 0;
while (1) {
/* Handle the timer interrupt */
seL4_Word badge;
seL4_Wait(ntfn_object.cptr, &badge);
printf("time_thread: badge=%lx\n", badge);
sel4platsupport_handle_timer_irq(&timer, badge);
count++;
if ((count / 50) * 50 == count)
{
count_s++;
printf("-----------------timer=%d %d\n", count, count_s);
}
}
It works fine (I am not sure why TIMESTAMP timer interrupt coming every ~40 sec, but it's not an issue right now)
Now I am trying to move all this timer code into a new thread, which I have created in the same vspace
// create thread
void initSleep(env_t penv) //seL4_BootInfo *info)
{
_penv = penv;
vka_object_t tcb_object = {0};
int error = vka_alloc_tcb(&penv->vka, &tcb_object);
seL4_CPtr cspace_cap;
cspace_cap = simple_get_cnode(&penv->simple);
seL4_CPtr pd_cap;
pd_cap = simple_get_pd(&penv->simple);
seL4_CPtr ipc_page;
seL4_Word ipc_buffer = (seL4_Word)vspace_new_ipc_buffer(&penv->vspace, &ipc_page);
error = seL4_TCB_Configure(tcb_object.cptr, , seL4_NilData, cspace_cap, seL4_NilData, pd_cap, seL4_NilData, ipc_buffer, ipc_page);
error = seL4_TCB_SetPriority(tcb_object.cptr, simple_get_tcb(&penv->simple), seL4_MaxPrio);
seL4_UserContext regs = {
.pc = (seL4_Word)time_thread,
.sp = (seL4_Word)thread_time_stack
};
error = seL4_TCB_WriteRegisters(tcb_object.cptr, 0, 0, 2, ®s);
error = seL4_TCB_Resume(tcb_object.cptr);
}
And this is thread function
static void time_thread(void)
{
_tick_number = 0;
int count_s = 0;
init_timer();
while (1)
{
/* Handle the timer interrupt */
seL4_Word badge;
seL4_Wait(timer_ntfn_object.cptr, &badge);
printf("time_thread: badge=%lx\n", badge);
sel4platsupport_handle_timer_irq(&timer, badge);
_tick_number++;
if ((_tick_number / 50) * 50 == _tick_number)
{
count_s++;
printf("-----------------timer=%lu %d\n", _tick_number, count_s);
}
}
The system crashed:
setup_irq@timer.c:81mailto:setup_irq@timer.c:81 Setting up IRQ 8000000000000000
<>
Here is dump:
/home/lm/sel4vm/stage/arm/zynqmp/include/sel4/sel4_arch/functions.h:23
421938: d53bd066 mrs x6, tpidrro_el0
setup_irq():
/home/lm/sel4vm/libs/libsel4platsupport/src/timer.c:85
error = seL4_IRQHandler_SetNotification(irq->handler_path.capPtr, irq->badged_ntfn_path.capPtr);
42193c: f85c8340 ldur x0, [x26,#-56]
arm_sys_send_recv():
/home/lm/sel4vm/stage/arm/zynqmp/include/sel4/sel4_arch/syscalls.h:165
register seL4_Word msg1 asm("x3") = *in_out_mr1;
421940: d2800003 mov x3, #0x0 // #0
seL4_SetCap():
/home/lm/sel4vm/stage/arm/zynqmp/include/sel4/arch/functions.h:59
421944: f901e8c1 str x1, [x6,#976]
arm_sys_send_recv():
/home/lm/sel4vm/stage/arm/zynqmp/include/sel4/sel4_arch/syscalls.h:166
register seL4_Word msg2 asm("x4") = *in_out_mr2;
421948: d2800004 mov x4, #0x0 // #0
/home/lm/sel4vm/stage/arm/zynqmp/include/sel4/sel4_arch/syscalls.h:167
register seL4_Word msg3 asm("x5") = *in_out_mr3;
42194c: d2800005 mov x5, #0x0 // #0
/home/lm/sel4vm/stage/arm/zynqmp/include/sel4/sel4_arch/syscalls.h:170
register seL4_Word scno asm("x7") = sys;
421950: 92800007 mov x7, #0xffffffffffffffff // #-1
/home/lm/sel4vm/stage/arm/zynqmp/include/sel4/sel4_arch/syscalls.h:161
register seL4_Word info asm("x1") = info_arg;
421954: d2941001 mov x1, #0xa080 // #41088
421958: f2a00021 movk x1, #0x1, lsl #16
/home/lm/sel4vm/stage/arm/zynqmp/include/sel4/sel4_arch/syscalls.h:171
asm volatile (
42195c: d4000002 hvc #0x0
seL4_MessageInfo_get_label():
/home/lm/sel4vm/stage/arm/zynqmp/include/sel4/shared_types_gen.h:49
I suspect that my thread initialization is not right, can somebody see any problem?
Thank you,
Leonid
________________________________
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________________________________
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