Determine which breakpoint was hit?

Question

I am trying to write a GDB script that "listens" to a remote target and responds to the start of one of two processes. I have the targeting part done but am stuck on identifying which breakpoint is hit.

The script would look something like this:

break *0x400de0    # Process 1 start addr
break *0x40f650    # Process 2 start addr
c                  # <- GDB waits here for one of the two processes to begin
# hits one of two breakpoints #
if (??? == "0x400de0")
    # do something
else
    # do something else

However, I'm somewhat stuck on getting the address at the breakpoint into a variable. I've looked into using frame which prints the current address, however I have no idea how to get that into a variable to use for comparison.

Try variable $pc.

ssbssa
– ssbssa

2019-09-10 10:01:23 +00:00
Commented Sep 10, 2019 at 10:01 — ssbssa
– ssbssa, Commented Sep 10, 2019 at 10:01

Christian B · Accepted Answer · 2019-09-15 04:26:43Z

1

I think you're looking for:

if ($pc == 0x400de0)

answered Sep 15, 2019 at 4:26

Christian B

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