Re: [Xenomai-help] trap exceptions in user

[Gabriele Moabiti <gabmoa@domain.hid>]

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>> It's a long story... I know anonymous mapping is better but I have need physical contiguos memory
>> (not for the test of course). The binary blob has fixed addresses between 1 to 16 MB so I have mapped the 
>To do this with RTDM, you should use rtdm_mmap_to_user, not
>rtdm_iomap_to_user. And to do this with an anonymous mapping, you simply
>need to pass the address where you want the mmap to occur to mmap, and
>pass MAP_FIXED to mmap flags, this is all documented in mmap manual.

I did't specify I have passed mem=xxx to kernel to take the upper 16MB so I have to use rtdm_iomap_to_user.
I think the RTDM mapping works.

>> I start UD from the terminal and the terminal always report the right error.
>
>Ok. Probably the I-pipe patch only calls your callback for real-time
>tasks. Is the thread which runs the binary blob created with xenomai
>services ?

my_rt_task_func()
{
    int 3 // This is trapped by the custom exception routine (forwarded to xenomai handler). The terminal write
            // trace/breakpoint trap
}

my_rt_task_func()
{
    call *asm_part
}

asm_part --- (it has been copied in the first 16 MB of user task mapped to the 16 MB kernel memory)

int 3 // This is not trapped by the custom exception routine however the a trace/breakpoint trap is raised and
       //  it is written in terminal
---

    Gabriele


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