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SubjectRe: [PATCH v2 1/3] kprobes/x86: use instruction_pointer and instruction_pointer_set
On Tue, Aug 20, 2019 at 09:02:59AM +0000, Jisheng Zhang wrote:
> 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 */

What's weird; I thought ARM has fixed sized instructions and they are
all 4 bytes? So how does a single byte offset make sense for ARM?

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