l4/sys/syscalls.h: No such file or directory

Valentin Hauner valentinhauner at gmx.de
Wed Sep 17 14:30:45 CEST 2014


Hi,

On 09/17/2014 10:23 AM, Björn Döbel wrote:
> An fpage() wants an address and a size. Your malloc() call yields an
> address (note: this is probably unaligned, maybe prefer to use
> posix_memalign()), the size is what you pass to malloc(). What would
> be the problem?
>   

Still the same problem, I'm getting page faults at the head of the
thread function with the following new code:

> // Out of function
> l4_umword_t   *thread_stacks[THREAD_MAX_NUM];
> // ...
> void foo() {
>   // ...
>   unsigned stack_size = THREAD_STACK_SIZE * sizeof(l4_umword_t);
>   if (posix_memalign((void**)&thread_stacks[count],
>                                     (size_t)L4_LOG2_PAGESIZE,
>                                     (size_t)stack_size) != 0)
>     return -1;
>   // ...
>   l4_touch_rw(thread_stacks[count], stack_size);
>   l4_task_map(task_cap, L4RE_THIS_TASK_CAP,
>                          l4_fpage((unsigned long)thread_stacks[count],
stack_size, L4_FPAGE_RWX),
>                         
l4_map_control((l4_umword_t)thread_stacks[count], 0, L4_MAP_ITEM_MAP));
>   // ...
> }


> That is, if you execute the thread code within the parent?

Yes, I simply bind the new threads to the current task
(L4RE_THIS_TASK_CAP) in this case.

Best regards,
Valentin



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