Where could I find any toturial about? Could you suggest me how to start? I'm a newby in this.
Thanks a lot Alle 22:30, sabato 3 marzo 2007, Richard Guenther ha scritto: > On 3/3/07, Fabio Giovagnini <[EMAIL PROTECTED]> wrote: > > Thanks for the answer. > > I go deeper in my thought so that maybe you can give me more infos about > > how I have to investagte about gcc/gdb > > > > We are developers of embedded software on board designed and build by us; > > Generally we use 16 bit cisc and 32 bits risc cpu (Renesas h8/h8s; sh 2 / > > 3 ). We write applications for automotive enviroment mainly. > > We write the code using c/c++ and we compile using gcc. > > Because of we do not have much memory (ram and flash) we develop in the > > following way: each software we write has the same communication protocol > > running on RS232 or over TCP/IP and we have a simple monitoring progarm > > able to show the contents of the memory addresses in some format (char, > > int, long, signed unsigned, strings, ecc). > > Generally we declare a global variable, we write a debug value into it > > and during the run time we read at the right moment the content of such a > > variable. > > Good. > > For avoiding to read by hand .map file produced by ld, I developed a flex > > / bison simple analizer able to extract from .map file the address of a > > symbol. So into my tool I load the .map file and I write the name of the > > variable and I can read the content of it. > > This way of working becomes very hard if I use struct and union in c and > > classes in c++; I should know the offeset of each field of the struct so > > addind it to the base address known from the .map file, for each istance > > of such a struct I coud write "mysrtuct.myfield" into my tool, and, > > calculating the rigth address, my protocol could ask the target to > > read/write the content at that address. > > > > I prefer to avoid -g option because of my memory is never enough; but a > > good compromise cound be if I could compile the debug infos into sections > > I could remove after used by gdb for giving me the informations about the > > offset of each field. Is it possible? > > Just use the dwarf info produced by the compiler with -g and strip the > binary. Of course I would debug embedded stuff using a simulator... > > Richard. -- Fabio Giovagnini Aurion s.r.l. via degli orti 11, 40050 Funo di Argelato (BO) Tel. +39.335.8350919 Fax +39.051.8659009 www.aurion-tech.com account telefono VoIP skype (www.skype.com): aurion.giovagnini
