Hi,
I am porting SEL4 on RISCV FPGA. I am stuck midway in the kernel elf loader.
The function stuck is memcpy. I have added prints and I am not progressing
after the last memcpy call in unpack_elf_to_paddr(). All kinds of input
appreciated.
Function under review:
*static void unpack_elf_to_paddr(void *elf, paddr_t dest_paddr)*
/* Parse size/length headers. */
dest_vaddr = elf_getProgramHeaderVaddr(elf, i);
data_size = elf_getProgramHeaderFileSize(elf, i);
data_offset = elf_getProgramHeaderOffset(elf, i);
/* Load data into memory. */
* memcpy((char *)dest_vaddr + phys_virt_offset,*
* (char *)elf + data_offset, data_size);*
* printf("loaded data into memory \n"); -----> Stuck Here !*
}
}
*Can anyone give me a clue on whatsoever to check here ? **It worked
perfectly in spike simulation.*
*RISCV FPGA configuration* - It supports IMAFD. It has already booted
linux. Kernel is loaded at physical address 80 million.
--
regards,
Sathya
Hi Experts,
Could some one help me in understanding the paging in SEL4 ? the MMU
architecture ?
Is there any material to understand ?
--
regards,
Sathya
>
> Hi,
>
> I am porting SEL4 on RISCV FPGA. I am stuck midway in the kernel elf
> loader.
>
> The function stuck is memcpy. I have added prints and I am not progressing
> after the last memcpy call in unpack_elf_to_paddr(). All kinds of input
> appreciated.
>
>
> Function under review:
> *static void unpack_elf_to_paddr(void *elf, paddr_t dest_paddr)*
>
> /* Parse size/length headers. */
> dest_vaddr = elf_getProgramHeaderVaddr(elf, i);
> data_size = elf_getProgramHeaderFileSize(elf, i);
> data_offset = elf_getProgramHeaderOffset(elf, i);
>
> /* Load data into memory. */
>
> * memcpy((char *)dest_vaddr + phys_virt_offset,*
> * (char *)elf + data_offset, data_size);*
> * printf("loaded data into memory \n"); -----> Stuck Here
> !*
> }
>
> }
>
> *Can anyone give me a clue on whatsoever to check here ? **It worked
> perfectly in spike simulation.*
>
> *RISCV FPGA configuration* - It supports IMAFD. It has already booted
> linux. Kernel is loaded at physical address 80 million.
>
--
regards,
Sathya
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:81 Setting up IRQ 8000000000000000
<<seL4(CPU 0) [handleInvocation/281 T0xff8000001200 "child of: 'rootserver'" @42195c]: Invocation of invalid cap #48762580.>>
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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Hi
I changed it to:
../init-build.sh -DPLATFORM=sabre -DCROSS_COMPILER_PREFIX=arm-none-eabi- -DCAMKES_APP=adder -DSIMULATE=1 -Dc_std=gnu99
and it worked for ninja build.
But when started simulation by ./simulate
the error is:
qemu-system-arm: -kernel images/capdl-loader-image-arm-imx6: unsupported machine type
Use -machine help to list supported machines
How could I choose the machine type? Thanks!
Sincerely
I'm currently working on a project that is using the old Kbuild system.
The project has been primarily implemented in C, however we would like to
integrate some Ada code into the project. I am familiar with how to use gcc
and makefiles to build polyglot projects on linux, however, I have no idea
how to do so with the Kbuild system, as I cannot find out how to build
anything other than .c or .h files with the makefile.
How would I go about adding ada code to the project? Is there any way for
me to build .ads and .adb, or .a files with the makefile?
Hello.
I'm a poor person looking for an advice.
I know this is the right place since all of you have huge expertise in
formal verification.
I'm not a smart person (maybe I'm stupid), but I'm interested in open
source contribution using C language.
Is there any solution to write C code free from undefined behavior and
vulnerability without paying for any tools?
Hello,
I have tried to call usleep() function from seL4 'main' thread and it crashes the system with error:
Caught cap fault in send phase at address 0x0
while trying to handle:
vm fault on code at address 0x200 with status 0x82000006
in thread 0xff807bfe2200 "rootserver" at address 0x200
With stack:
How to use this library?
Thank you,
Leonid
