问题描述
我似乎不能够组装MCR和MRC的ARMv7指令（这些是协处理器访问指令）与iPhone？我有一些在与code的Sourcery GCC工具链建设一个不同的CortexA8芯片（采用OMAP芯片）工作，很好地一些内联汇编块这些说明，但苹果的装配 - 铛汇编和他们的GNU汇编编译 - 扔了错误：
I don't seem to be able to assemble the MCR and MRC ARMv7 instructions (these are coprocessor access instructions) with iPhone? I have some of these instructions in some inline assembly blocks that work quite nicely with the Code Sourcery gcc toolchain building for a different CortexA8 chip (an OMAP chip), but Apple's assemblers - the Clang assembler and their build of the gnu assembler - throw up errors:
{standard input}:41:bad instruction `MRC p15,0,r2,C9,C12,0'
{standard input}:56:bad instruction `MCR p15,0,r0,C9,C12,0'
{standard input}:78:bad instruction `MCR p15,0,r0,C9,C12,1'
{standard input}:96:bad instruction `MCR p15,0,r0,C9,C12,2'
{standard input}:119:bad instruction `MCR p15,0,r2,C9,C12,4'
{standard input}:143:bad instruction `MCR p15,0,r0,C9,C12,5'
{standard input}:165:bad instruction `MCR p15,0,r0,C9,C13,1'
{standard input}:187:bad instruction `MCR p15,0,r0,C9,C13,2'
{standard input}:209:bad instruction `MCR p15,0,r0,C9,C13,0'
{standard input}:228:bad instruction `MRC p15,0,r0,C9,C13,0'
{standard input}:253:bad instruction `MRC p15,0,r0,C9,C13,2'
任何想法？
推荐答案
（原文关于这一问题的评论）
(Originally as a comment on the question)
随机猜测：你试图改变MRC到MRC？苹果有一个与写在大写什么麻烦一个相对古老的ARM汇编。
Random guess: have you tried changing "MRC" to "mrc"? Apple has a relatively ancient ARM assembler that has trouble with anything written in upper-case.
这篇关于不能编译/安装在iPhone上MRC和MCR协处理器指令？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！