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Re: ARM: Improved IT disassembly
Richard Earnshaw <Richard.Earnshaw@arm.com> writes:
>> I'm honestly at a loss for any other viable approach. The instruction
>> encoding doesn't lend itself to scanning backward, and in any case, in
>> print_insn I have no information to say where a backward scan should
>> stop.
>
> There is a reasonable bound (any code label must be on an instruction
> boundary) and scanning back should converge rapidly. I'll send you a
> private mail with the details, but it will have to wait until tomorrow
> now.
To be slightly clearer, when I said "I have no information to say
where a backward scan should stop", I meant "print_insn does not know
the beginning of the memory region containing the instruction." If I
blindly call info->read_memory_func (pc - 2), will it not crash in the
case where pc is at the very beginning of the segment?
zw