Hi Jisheng,

On Wed, 21 Aug 2019 02:09:10 +0000
Jisheng Zhang [off-list ref] wrote:

quoted

quoted

In v2, actually, the arm64 version's kprobe_ftrace_handler() is the same
as x86's, the only difference is comment, e.g

/* Kprobe handler expects regs->ip = ip + 1 as breakpoint hit */

while in arm64

/* Kprobe handler expects regs->pc = ip + 1 as breakpoint hit */  

As Peter pointed, on arm64, is that really 1 or 4 bytes?
This part is heavily depends on the processor software-breakpoint
implementation.

Per my understanding, the "+1" here means "+ one kprobe_opcode_t".

No, that is the size of INT3. It just emulates the software trap on x86.

Thank you,
-- 
Masami Hiramatsu [off-list ref]