Question

我有这样的东西：

(fcn) fcn.140001020 20
   fcn.140001020 ();
           ; XREFS: CALL 0x140001080  CALL 0x140001098  CALL 0x1400010b0  CALL 0
           ; XREFS: CALL 0x140001794  CALL 0x1400017ad  CALL 
           0x140001029      mov dword [0x140018a38], eax

我希望能够给地址0x140018a38起一个名字，这样它就会出现类似的内容：

           0x140001029      mov dword [myGlobal], eax

Answer 1

环境

radare2： radare2 4.2.0-git 23519 @ linux-x86-64 git.4.1.1-84-g0c46c3e1e commit：0c46c3e1e30bb272a5a05fc367d874af32b41fe4 build：2020-01-08__09：49：0
系统： Ubuntu 18.04.3 LTS

解决方案

我不确定radare2是否可以实现您想要的确切功能，但是我们可以使用Cf和CCa命令来接近它。
- CCa [-at] | [at] [text] [@addr]＃在给定地址添加/删除评论
- Cf [？] [-] [sz] [0 | cnt] [fmt] [a0 a1 ...] [@addr]＃格式内存（请参阅pf？）

示例

user@host:~$ r2 /my/example
[0x00000000]> aaaa
...
[0x00000000]> s fcn.140001020
[0x140001020]> pd 1
(fcn) fcn.140001020 20
   fcn.140001020 ();
           ; XREFS: CALL 0x140001080  CALL 0x140001098  CALL 0x1400010b0  CALL 0
           ; XREFS: CALL 0x140001794  CALL 0x1400017ad  CALL 
           0x140001029      mov dword [0x140018a38], eax
[0x140001020]> CCa 0x140001020 0x140018a38 = myGlobal
[0x140001020]> pd 1
(fcn) fcn.140001020 20
   fcn.140001020 ();
           ; XREFS: CALL 0x140001080  CALL 0x140001098  CALL 0x1400010b0  CALL 0
           ; XREFS: CALL 0x140001794  CALL 0x1400017ad  CALL 
           0x140001029      mov dword [0x140018a38], eax ; 0x140001029 = myGlobal
[0x140001020]> Cf 2 w myGlobal @ 0x140018a38
[0x140001020]> pd 1 @ 0x140018a38
            0x140018a38 format w myGlobal {
 myGlobal : 0x140018a38 = 0xffff
} 2
[0x140001020]> q
user@host:~$

如何在radare2中为全局变量命名？

1 个答案: