6 May
2019
6 May
'19
8:44 p.m.
On Mon, May 6, 2019 at 1:42 PM Linus Torvalds torvalds@linux-foundation.org wrote:
What *can* make sense is "Oh, I'm emulating a call, but I know that call will be rewritten, so let me emulate the call and then short-circuit the emulation immediately".
That made no sense. The end should have been "and then short-circuit the _rewriting_ immediately" of course.
The "emulate a call" is just to make the "struct pt_regs" state look like it would have after the call. The "short circuit the rewriting" part is the thing that then rewrites the actual instruction based on that pt_regs state.
Linus