7 May
2019
7 May
'19
2:58 a.m.
On Mon, 6 May 2019 19:22:06 -0700 Linus Torvalds torvalds@linux-foundation.org wrote:
Notice? We'd not even have to look up any values. We'd literally just do something like
int offset = locked_atomic_read(ip+1); return int3_emulate_call(ip, ip+5+offset);and it would be *atomic* with respect to whatever other user that updates the instruction, as long as they update the offset with a "xchg" instruction.
Honestly, I'm not really sure what you are trying to do here.
Are you talking about making the update to the code in the int3 handler? And then just returning back to the regs->ip and executing the new call (not really emulating).
-- Steve