Messages in this thread | | | Subject | Re: [PATCH v2 4/4] x86/static_call: Add inline static call implementation for x86-64 | From | Andy Lutomirski <> | Date | Thu, 29 Nov 2018 09:41:33 -0800 |
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> On Nov 29, 2018, at 9:21 AM, Steven Rostedt <rostedt@goodmis.org> wrote: > > On Thu, 29 Nov 2018 12:20:00 -0500 > Steven Rostedt <rostedt@goodmis.org> wrote: > > >> r8 = return address >> r9 = function to call >> > > Bad example, r8 and r9 are args, but r10 and r11 are available. > > -- Steve > >> push r8 >> jmp *r9 >> >> Then have the regs->ip point to that trampoline.
Cute. That’ll need ORC annotations and some kind of retpoline to replace the indirect jump, though.
>> >> -- Steve >
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