什么字节发出一个ARM64相当于EBFE的？ [英] What bytes to emit for an ARM64 equivalent of EBFE?

问题描述

什么是这对86相当于ARM64？

What is the EBFE which is for x86 equivalent for ARM64?

看到了类似的帖子（<一个href=\"http://stackoverflow.com/questions/9595940/what-bytes-to-emit-for-an-arm-equivalent-of-ebfe\">What字节发出一个相当于ARM的EBFE ）？但它不工作。可能是32位>

Saw a similar posting (What bytes to emit for an ARM equivalent of EBFE?) but it is not working. Probably for 32 bit>

由于提前

推荐答案

由于我没有的知道的确切答案，也不觉得自己挖掘出ARMv8 ARM和编码手的指令，我要骗：

Since I neither know the exact answer, nor feel like digging out the ARMv8 ARM and hand-encoding an instruction, I'm going to cheat:

$ echo "b ." | aarch64-linux-gnu-as
$ aarch64-linux-gnu-objdump -d a.out

a.out:     file format elf64-littleaarch64


Disassembly of section .text:

0000000000000000 <.text>:
   0:   14000000        b       0 <.text>

嗯，这很容易; 0x14000000 是

编辑：万一明显需要指出，这就是32位指令字。它的实际字节必须以正确的顺序为系统字节​​序，即逆转了LE系统。

just in case the obvious needs stating, that's the 32-bit instruction word. The actual bytes of it need to be in the correct order for the system endianness, i.e. reversed for a LE system.

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