如何改变这种code到ARM汇编指令？ [英] How to change this code to ARM assembly instructions?

问题描述

如何改变这种code到ARM汇编指令？
我想运行在Android中kernel.But这个code，我不知道如何使用ARM汇编指令。

How to change this code to ARM assembly instructions? I want to run this code in android kernel.But I don't know how to use ARM assembly instructions.

#define _syscall3(type,name,type1,arg1,type2,arg2,type3,arg3) \
type name(type1 arg1,type2 arg2,type3 arg3) \
{ \
long __res; \
__asm__ volatile ("int $0x80" \
       : "=a" (__res) \
       : "0" (__NR_##name),"b" ((long)(arg1)),"c" ((long)(arg2)), \
                "d" ((long)(arg3))); \
__syscall_return(type,__res); \
}

非常感谢。

推荐答案

您需要的ARM什么是软件中断指令是在x86'诠释'的大致相当于：

What you need on ARM is the "software interrupt" instruction which is a rough equivalent of 'int' on x86:

swi 0  ;  0 is the interrupt vector for "syscall"

您可以在这里得到的概述： OSDev维基ARM的

You can get an overview here: OSDev Wiki on ARM

在你好，世界为ARM / Android版可以在此发现的帖子

The "hello, world" for ARM/Android can be found in this post

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