Re: [PATCH v2 1/3] kprobes/x86: use instruction_pointer and instruction_pointer_set
From: Peter Zijlstra <peterz@infradead.org>
Date: 2019-08-20 13:21:31
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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? _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel