Re: how GDB use ptrace to return from a function

Yubin Ruan
2017-11-18T03:46:26Z

Thanks Joel,

2017-11-18 0:10 GMT+08:00 Joel Brobecker <brobecker@adacore.com>:
>> I don't know whether GDB is using this kind of technique. If anyone
>> know that, can you enlighten me, and probably point me to the source?
>
> GDB sets the call up so that the return address is at specific
> location (usually the program's entry point, but that's arch-
> dependent), and then places a breakpoint at that address. It
> then knows, when receiving the corresponding breakpoint event,
> that a breakpoint at that address corresponds to the end of
> the function that we called.

what break point events are common for X86?

Yubin