How to implement a GDB function depending on the architecture

Question

I'm writing a GDB script in python to print some debug information of the application. The thing is multiple architectures are supported: x86, alpha, aarch64, and probably some more later. The function printing the debug information varies from the architecture.

So in fact I've got the following functions:

def print_info_x86():
   #...


def print_info_aarch64():
   #...


def print_info_alpha():
   #...

And I want to achieve something like the following:

def print_info():
   if arch == 'x86':
      print_info_x86()
   #etc..

Is there a way to do that? There is a GDB command show architecture and it's possible to extract it from objdump -a, but is there a simpler way to understand what architecture the binary was compiled for in GDB?

0___________ · Accepted Answer · 2022-08-28 18:41:55Z

2

https://sourceware.org/gdb/onlinedocs/gdb/Architectures-In-Python.html

something like this:

f = gdb.selected_frame()
a = f.architecture()
print(a.name())

edited Aug 28, 2022 at 18:41

answered Aug 28, 2022 at 18:15

0___________

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3 Comments

Some Name Over a year ago

You probably meant frame = gdb.selected_frame(), not f = gdb.selected_frame()

0___________ Over a year ago

@SomeName copy-paste copied the invokation form the documentation

ssbssa Over a year ago

I would probably use gdb.selected_inferior().architecture().name() instead, so I don't need a running process.

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