RTEMS_FATAL_SOURCE_EXCEPTION during startup

[groups at chichak.ca]

It’s bombing in printf. It’s so early that the stack hasn’t been set up yet, and it’s found an error and it’s trying to poot a message out on the console, which is also not set up yet.

Umm, what could be wrong? Lemme think… (I’ve worked wth this bsp in RTEMS4.11, and a version in RTEMS5)  

I had problems with that BSP blowing up just like this because portions of it weren’t compiled with the proper instruction set, and when the startup code called memset (I think), it would call memset in newlib/libc that was compiled for the wrong architecture, do the wrong thing, end up in printf and die a horrible death.

Let’s see if I can find the thread on Discord…

around August 19/2021

run:

rtems-exeinfo -O blah.exe

and make sure that all of the functions have the same architecture specified. Mine had a mix of -mcpu=cortex-m4 and -mcpu=arm7tdmi which are incompatible.



Andrei Chichak
(from The Great White North)


> On 2021-December-31, at 18:48, Петр Борисенко <peter at awsmtek.com> wrote:
> 
> Hello and Happy new year!
> I am getting an error during startup:
> RTEMS_FATAL_SOURCE_EXCEPTION
> Catching it in _ARM_Exception_default.
> The bsp is `arm/stm32f4`.
> Here is contains of CPU_Exception_frame:
> register_r0 uint32_t 0x80139bc
> register_r1 uint32_t 0
> register_r2 uint32_t 0
> register_r3 uint32_t 76
> register_r4 uint32_t 0
> register_r5 uint32_t 0
> register_r6 uint32_t 0
> register_r7 uint32_t 0
> register_r8 uint32_t 0
> register_r9 uint32_t 0
> register_r10 uint32_t 0
> register_r11 uint32_t 0
> register_r12 uint32_t 0
> register_sp uint32_t 536909088
> register_lr void * 0x80001c3 <bsp_start_hook_0_done+4>
> register_pc void * 0x8013f08 <_svfprintf_r+8152>
> register_xpsr uint32_t 16777216
> vector uint32_t 3
> vfp_context const ARM_VFP_context * 0x0
> reserved_for_stack_alignment uint32_t 3522771716
> &Console_Port_Minor rtems_device_minor_number * 0x20006988
> <Console_Port_Minor>
> *&Console_Port_Minor rtems_device_minor_number 1363452156
> 
> What could it be? Any common reasons? Or what additional info should I
> provide?
> 
> Also it would be really appreciated if someone will help me export/build
> bsp as a debuggable source tree.
> 
> Best regards.
> Peter Borisenko
> Awesome Technologies, Ltd.
> http://awsmtek.com
> hardware at awsmtek.com
> +79062165482
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