Re: [PATCH v2 23/31] arm64: Debugging support
From: Will Deacon <hidden>
Date: 2012-08-20 09:08:09
Also in:
linux-arm-kernel, lkml
On Fri, Aug 17, 2012 at 08:06:07AM +0100, Arnd Bergmann wrote:
Sorry for the dumb question, but why do you even need PTRACE_GET_THREAD_AREA for 64 bit tasks? I thought the thread pointer is a GPR, or is this just for compat tasks?
The TLS is stored in a co-processor register which is read-only for userspace. However, it's banked, so accessing the TLS of your child (the guy you're ptracing) requires a system call. Will