rtems hello world, doesn't hit POSIX_init

alrik alrik at utopiacompression.com
Sat Oct 4 02:03:01 UTC 2014

Hey all,

I'm new to using rtems (and rtos'es in general), so apologies if my 
question covers well-tread ground.

I have a minimal, hello world type of main.cpp -- I use POSIX_Init as my 
entry point, do a printf, then exit. I also am compiling a separate, 
large code base and linking it into the executable, but I am not 
including any files from it or calling any of the functions from there 
in my main file.

When I run my application, it doesn't seem to ever hit my POSIX_Init 
entry point -- I don't see my printf call, and if I run it in a debugger 
and look at the backtrace after it has completed, I get the following --

moviDebug: INFO: IP = 70181110, , crt0.S, 338.
moviDebug: INFO: IP = 7018B66C, _User_extensions_Iterate at 0x3C, 
userextiterate.c, 155.
moviDebug: INFO: IP = 70188DF8, _Terminate at 0x20, userextimpl.h, 245.
moviDebug: INFO: IP = 701985C0, rtems_gxx_mutex_init at 0x38, 
gxx_wrappers.c, 178.
moviDebug: INFO: IP = 70192FB4, 
_GLOBAL__sub_I___cxa_allocate_exception at 0x18, concurrence.h, 135.
moviDebug: INFO: IP = 70199504, , pthreadself.c, 32.
moviDebug: INFO: IP = 7019A7FC, , pthreadself.c, 32.
moviDebug: INFO: IP = 70190DD0, _Thread_Handler at 0xF8, threadhandler.c, 181.
moviDebug: INFO: IP = 70190CD8, _Thread_Handler at 0x0, threadhandler.c, 89.
moviDebug: INFO: IP = CDCDCDCD, , pthreadself.c, 32.
moviDebug: INFO: IP = ADADADAD, , pthreadself.c, 32.
moviDebug: INFO: IP = 0, , confdefs.h, 68.

I'm at a bit of a loss as to why this could be the case; I can run this 
same rtems/posix 'hello world' correctly when I'm not linking to the 
separate, large code base, but since I'm not including or calling any of 
that code's files or functions, how can it be having this effect (i.e. 
my program's inability to get to the entry function)?


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