Re: GDB shared library tracking with stap probes x _dl_debug_state
Sergio Durigan Junior via Gdb <[email protected]>
| Newsgroups | gmane.comp.gdb.devel,gmane.comp.lib.glibc.alpha |
|---|---|
| Message-ID | <87bl9mi4xi.fsf@paluero> |
On Friday, May 07 2021, Luis Machado via Gdb wrote: > On 5/7/21 5:44 PM, Florian Weimer wrote: >> * Luis Machado via Libc-alpha: >> >>> That's all fine, but there is one small detail that doesn't work for >>> armhf, and that is discovering if we're dealing with a PC that is arm >>> mode or thumb mode. >> Is it possible to recognize Arm mode vs thumb mode based on the NOP >> encoding at the probe address? >> > > If we know the instruction is a NOP, it might be possible. I think it's guaranteed that the instruction is always going to be a NOP. -- Sergio GPG key ID: 237A 54B1 0287 28BF 00EF 31F4 D0EB 7628 65FC 5E36 Please send encrypted e-mail if possible https://sergiodj.net/