Shell脚本------解析elf文件及awk基本使用

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1.读elf文件

arm-eabi-nm *.elf

2.awk字符判断及 if语句

运算符描述赋值运算符= += -= *= /= %= ^= **=赋值语句逻辑运算符||逻辑或&&逻辑与正则运算符~ ~!匹配正则表达式和不匹配正则表达式关系运算符< <= > >= != ==关系运算符算术运算符+ -加，减* / &乘，除与求余+ - !一元加，减和逻辑非^ ***求幂++ --增加或减少，作为前缀或后缀其它运算符$字段引用空格字符串连接符?:C条件表达式in数组中是否存在某键值

[cpp] view plaincopyprint?

awk -F " " '
{
if(""$2""~/T/)
printf("%x, %s, %s\n", ""$1"", ""$2"", ""$3"");
}
'

awk -F " " '{if(""$2""~/T/)printf("%x, %s, %s\n", ""$1"", ""$2"", ""$3"");}'

3.awk打印16补齐空位

[cpp] view plaincopyprint?

#!bin/sh
arm-eabi-nm 1.test.axf |
awk -F " " '
{
if(""$2""~/T/)
printf("0x%08x, %s, %s\n", ""$1"", ""$2"", ""$3"");
}
'

#!bin/sharm-eabi-nm 1.test.axf |awk -F " " '{if(""$2""~/T/)printf("0x%08x, %s, %s\n", ""$1"", ""$2"", ""$3"");}'

4.awk实现16进制加法

[cpp] view plaincopyprint?

#!bin/sh
arm-eabi-nm 1.test.axf |
awk -F " " '
{
if(""$2""~/T/)
printf("%d, %s, %s\n", ""$1+1"", ""$2"", ""$3"");
else
printf("%d, %s, %s\n", ""$1"", ""$2"", ""$3"");
}
'

#!bin/sharm-eabi-nm 1.test.axf |awk -F " " '{if(""$2""~/T/)printf("%d, %s, %s\n", ""$1+1"", ""$2"", ""$3"");elseprintf("%d, %s, %s\n", ""$1"", ""$2"", ""$3"");}'

5.awk 计数

[cpp] view plaincopyprint?

#!bin/sh
arm-eabi-nm 1.test.axf |
awk -F " " '
{
if(""$2""~/T/)
printf("%d %s %s\n", ""$1+1"", ""$2"", ""$3"");
else
printf("%d %s %s\n", ""$1"", ""$2"", ""$3"");
}
'|
awk -F " " '
BEGIN{i=0;}
{
i++;
printf("{0x%08x, %s},\n", ""$1"", ""$3"");
}
END{printf("i=%d\n",i)}
'

#!bin/sharm-eabi-nm 1.test.axf |awk -F " " '{if(""$2""~/T/)printf("%d %s %s\n", ""$1+1"", ""$2"", ""$3"");elseprintf("%d %s %s\n", ""$1"", ""$2"", ""$3"");}'|awk -F " " 'BEGIN{i=0;}{i++;printf("{0x%08x, %s},\n", ""$1"", ""$3"");}END{printf("i=%d\n",i)}'

补充：

%d 十进制有符号整数
%u 十进制无符号整数
%f 浮点数
%s 字符串
%c 单个字符
%p 指针的值
%e 指数形式的浮点数
%x, %X 无符号以十六进制表示的整数
%0 无符号以八进制表示的整数
%g 自动选择合适的表示法
\n 换行
\f 清屏并换页
\r 回车
\t Tab符
\xhh 表示一个ASCII码用16进表示,其中hh是1到2个16进制数