Pls help: regarding gdb internals

[Arun Paneri <arunpaneri at yahoo dot com>]

Hi All,

 I am new to gdb code and trying to learn more things. i need help regarding gdb internals.

Can anyone write few lines about how does gdb internally works. I went to "Gdb internals guide" but couldn't find much information specifically which i am looking for. I want information like when we give command
"$gdb test.exe" then how internaly it works. Does it start reading symbols and start making symbol table with this command ? 
Does it start creating stack frames as we give command "run" or before even that with "$gdb test.exe"? I am basically interested to know about creation of frames and how does gdb read them back when we give "backtrace" command? 

I am not sure but i think to creat a frame it calls _initialize_stack (void) and from this it calls fun_command(char *arg, int from_tty) then parse_frame_specification(char *frame_exp) & then create_new_frame(CORE_ADDR addr, CORE_ADDR pc) function.

Pls help.

Thanks & Regards,
Arun


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