Re: [PATCH v3 42/51] x86/unwind: create stack frames for saved syscall registers

[Andy Lutomirski]

On Fri, Aug 12, 2016 at 7:29 AM, Josh Poimboeuf <jpoimboe@xxxxxxxxxx> wrote:
> The entry code doesn't encode pt_regs for syscalls.  But they're always
> at the same location, so we can add a manual check for them.

At first I thought these would be useless (they're the *user* state
and aren't directly relevant to the kernel), but then I realized that
they could be extremely valuable: they contain the syscall args.  Do
they display in OOPS dumps?  It might be nice to add orig_ax to the
regs display too so we get the syscall nr as well.

--Andy