Cannot print stack frame using stack-view when in main method

[noahboegli]

I'm having a small issue when willing to display the stack being in the main method.

It would seem that this condition is executed when main's stackframe is selected:

gef-extras/scripts/stack.py

Lines 18 to 22 in 3d83535

	if not frame.older():
	#reason = frame.unwind_stop_reason()
	reason_str = gdb.frame_stop_reason_string( frame.unwind_stop_reason() )
	warn("Cannot determine frame boundary, reason: {:s}".format(reason_str))
	return

Which does not make sense to me, because when I execute info frame, it clearly shows that the frame has a calling frame (thus frame.older() should not return None)

Stack level 0, frame at 0xffffce20:
eip = 0x804863e in simple_echo; saved eip = 0x8048700
called by frame at 0xffffcff0
Arglist at 0xffffce18, args:
Locals at 0xffffce18, Previous frame's sp is 0xffffce20
Saved registers:
ebp at 0xffffce18, eip at 0xffffce1c

Edit: After a bit more investigation, I have found a way to fix it and proposed a PR (#67), the spoiler below contains the former content of the issue

Click to expand

There is probably an easy fix but I'm not at ease with the Python-GDB API and I have not been able to work around it. The only issue I'm not able to fix is finding the stack HI adress without using the calling frame SP:

# Could something like this exist?
stack_hi = align_address(int(frame.read_register("bp")))

If someone has the code to find the HI address of the frame, I'm open to make a PR.