Hello everybody,
my name is Gianluca Magnani and this is my first post in the forum.
I would like to ask your help in order to solve a little problem that I've encountered once I started to debug external ELF files: I have developed a simple application that read and launches threads starting from ELF files. The application works with MMU enabled and so each thread has its own Virtual Memory. I found a very useful manual that explains how to debug an external ELF: basically, this is done performing the following steps:
1. Load the main application (my application)
2. Drag and drop the external ELF file into the project. This will result in the creation of a new project containing the source of the ELF. I set up the project in order to be suitable for the target.
3. Add the ELF file to "Other executables" list in the project settings.
4. Start a debug session (so, I start to debug my main application)
5. Load the ELF file into the memory (Load/Save Memory)
6. Load Symbolic window (this will show two executables, my application and the external ELF)
7. Start to debug.
If I perform these steps with Virtual Memory disabled, there is no problem at all. Once the application starts the external ELF, the debug shows the code and I can perform a normal debug (I also see the variables values and I can change them). If i perform these steps with Virtual Memory enabled, I succeed (sometimes) in entering into the external ELF code once the control passed to it, but I'm not able to:
1. see variables values
2. change them (if I try to change a value of a variable, an entire portion of memory is changed!! It is really weird)
I cannot figure how I can debug my external ELF file with Virtual Memory enabled. I even tried to use a Memory Configuration file, but It seems not to work: the External ELF file has its entry point at 0x10000094, and starts at 0x10000000; I observed that the first physical address for the mapping that my MMU gives to the application is 0x00119000, so I set the memory configuration file as following:
translate 0x10000000 0x001190000 0x1000000
But it seems that nothing changed.
Someone have experience in external ELF debugging and Virtual Memory? Maybe I missed something in the set up phase?
Thank you for your help.
Gianluca
