【基于Android的ARM汇编语言系列】之二：C/C++程序生成ARM汇编程序的过程分析

作者：郭嘉
邮箱：[email protected]
博客：http://blog.csdn.net/allenwells
github：https://github.com/AllenWell

【基于Android的ARM汇编语言系列】章节列表

【基于Android的ARM汇编语言系列】之一：ARM汇编语言开篇
【基于Android的ARM汇编语言系列】之二：C/C++程序生成ARM汇编程序的过程分析
【基于Android的ARM汇编语言系列】之三：ARM汇编语言程序结构
【基于Android的ARM汇编语言系列】之四：ARM处理器的寻址方式
【基于Android的ARM汇编语言系列】之五：ARM指令集与Thumb指令集
【基于Android的ARM汇编语言系列】之六：NEON指令集与VFP指令集

所谓的原生程序指的是用C/C++编写的程序，下面来详细演示一下原生程序是怎么一步步生成汇编代码的。

这里编译的是一个简单的hello.c程序，如下所示：

#include 

int main(int argc, char* argv[]){
    printf("Hello ARM!\n");
    return 0;
}

一 预处理

预处理阶段会处理代码中的预处理指令,如下所示：

• #include
• #define
• #if

执行以下命令进行预处理，-E可以用来查看详细输出。

gcc -E hello.c -o hello.i

成成的hello.i如下所示：

# 1 "hello.c"
# 1 ""
# 1 ""
# 1 "hello.c"
# 1 "c:/android-ndk-r8/platforms/android-14/arch-arm/usr/include/stdio.h" 1
# 41 "c:/android-ndk-r8/platforms/android-14/arch-arm/usr/include/stdio.h"
# 1 "c:/android-ndk-r8/platforms/android-14/arch-arm/usr/include/sys/cdefs.h" 1
# 59 "c:/android-ndk-r8/platforms/android-14/arch-arm/usr/include/sys/cdefs.h"
# 1 "c:/android-ndk-r8/platforms/android-14/arch-arm/usr/include/sys/cdefs_elf.h" 1
# 60 "c:/android-ndk-r8/platforms/android-14/arch-arm/usr/include/sys/cdefs.h" 2
# 42 "c:/android-ndk-r8/platforms/android-14/arch-arm/usr/include/stdio.h" 2
# 1 "c:/android-ndk-r8/platforms/android-14/arch-arm/usr/include/sys/_types.h" 1
# 40 "c:/android-ndk-r8/platforms/android-14/arch-arm/usr/include/sys/_types.h"
# 1 "c:/android-ndk-r8/platforms/android-14/arch-arm/usr/include/machine/_types.h" 1
# 52 "c:/android-ndk-r8/platforms/android-14/arch-arm/usr/include/machine/_types.h"
typedef signed char __int8_t;
typedef unsigned char __uint8_t;
typedef short __int16_t;
typedef unsigned short __uint16_t;
typedef int __int32_t;
typedef unsigned int __uint32_t;

typedef long long __int64_t;

typedef unsigned long long __uint64_t;


typedef __int8_t __int_least8_t;
typedef __uint8_t __uint_least8_t;
typedef __int16_t __int_least16_t;
typedef __uint16_t __uint_least16_t;
typedef __int32_t __int_least32_t;
typedef __uint32_t __uint_least32_t;
typedef __int64_t __int_least64_t;
typedef __uint64_t __uint_least64_t;


typedef __int32_t __int_fast8_t;
typedef __uint32_t __uint_fast8_t;
typedef __int32_t __int_fast16_t;
typedef __uint32_t __uint_fast16_t;
typedef __int32_t __int_fast32_t;
typedef __uint32_t __uint_fast32_t;
typedef __int64_t __int_fast64_t;
typedef __uint64_t __uint_fast64_t;


typedef int __intptr_t;
typedef unsigned int __uintptr_t;


typedef __int64_t __intmax_t;
typedef __uint64_t __uintmax_t;


typedef __int32_t __register_t;


typedef unsigned long __vaddr_t;
typedef unsigned long __paddr_t;
typedef unsigned long __vsize_t;
typedef unsigned long __psize_t;


typedef int __clock_t;
typedef int __clockid_t;
typedef long __ptrdiff_t;
typedef int __time_t;
typedef int __timer_t;

typedef __builtin_va_list __va_list;






typedef int __wchar_t;

typedef int __wint_t;
typedef int __rune_t;
typedef void * __wctrans_t;
typedef void * __wctype_t;
# 41 "c:/android-ndk-r8/platforms/android-14/arch-arm/usr/include/sys/_types.h" 2

typedef unsigned long __cpuid_t;
typedef __int32_t __dev_t;
typedef __uint32_t __fixpt_t;
typedef __uint32_t __gid_t;
typedef __uint32_t __id_t;
typedef __uint32_t __in_addr_t;
typedef __uint16_t __in_port_t;
typedef __uint32_t __ino_t;
typedef long __key_t;
typedef __uint32_t __mode_t;
typedef __uint32_t __nlink_t;
typedef __int32_t __pid_t;
typedef __uint64_t __rlim_t;
typedef __uint16_t __sa_family_t;
typedef __int32_t __segsz_t;
typedef __uint32_t __socklen_t;
typedef __int32_t __swblk_t;
typedef __uint32_t __uid_t;
typedef __uint32_t __useconds_t;
typedef __int32_t __suseconds_t;





typedef union {
 char __mbstate8[128];
 __int64_t __mbstateL;
} __mbstate_t;
# 43 "c:/android-ndk-r8/platforms/android-14/arch-arm/usr/include/stdio.h" 2



# 1 "c:/android-ndk-r8/toolchains/arm-linux-androideabi-4.4.3/prebuilt/windows/bin/../lib/gcc/arm-linux-androideabi/4.4.3/include/stdarg.h" 1 3 4
# 40 "c:/android-ndk-r8/toolchains/arm-linux-androideabi-4.4.3/prebuilt/windows/bin/../lib/gcc/arm-linux-androideabi/4.4.3/include/stdarg.h" 3 4
typedef __builtin_va_list __gnuc_va_list;
# 47 "c:/android-ndk-r8/platforms/android-14/arch-arm/usr/include/stdio.h" 2



# 1 "c:/android-ndk-r8/toolchains/arm-linux-androideabi-4.4.3/prebuilt/windows/bin/../lib/gcc/arm-linux-androideabi/4.4.3/include/stddef.h" 1 3 4
# 211 "c:/android-ndk-r8/toolchains/arm-linux-androideabi-4.4.3/prebuilt/windows/bin/../lib/gcc/arm-linux-androideabi/4.4.3/include/stddef.h" 3 4
typedef unsigned int size_t;
# 51 "c:/android-ndk-r8/platforms/android-14/arch-arm/usr/include/stdio.h" 2

# 1 "c:/android-ndk-r8/toolchains/arm-linux-androideabi-4.4.3/prebuilt/windows/bin/../lib/gcc/arm-linux-androideabi/4.4.3/include/st