如何正确安装和调用 'r2snow' radare2 反编译器?

How can I properly install and invoke 'r2snow' radare2 decompiler?

过去几个小时我一直在尝试安装反编译器,但没有成功。因为我最近一直在 ~/.local/share/radare2/prefix/bin 中使用 radare2 as a disassembler, I figured using the associated decompiler package would work well. After finding out that radeco and radeco-lib aren't currently stable enough to build, I used their package manager r2pm to finally install the r2snow BASH 脚本。

但现在我不知道如何 运行 它来反编译二进制文件!我收到的错误消息是:"Usage: r2 -i '.!r2snow'"。我知道 r2 对于 radare2 是 shorthand,-i 标志是将脚本文件传递给 运行,但我已经尝试将其传递给r2snow BASH 以多种方式编写脚本均未成功。

有使用过这个特殊反编译器经验的人知道如何正确调用它吗?通常我可以自己解决这个问题,但事实证明缺乏适当的文档太困难了。

我没骗你,每次你调用程序不当,它都在嘲笑你。最近:"Usage: r2 -i '.!r2snow'" -- This should be documented, since it's not that obvious. 也许我应该尝试完全不同的反编译器。有没有更容易设置的免费反编译器?

要安装 radare2 插件,您应该从:

$ r2pm init
$ r2pm update

然后使用 r2pm:

安装你想要的插件
$ r2pm -i r2snow

您可能会遇到此错误:

ERROR: Build failed. You probably need 'brew install cartr/qt4/qt' and 'brew install boost' or 'sudo apt-get install libboost-dev libqt4-dev'

所以只需安装缺少的库:

$ sudo apt-get install libboost-dev libqt4-dev'

然后,您可以通过 !r2snow 从 r2 shell 或外部 r2 -i '.!r2snow' /bin/ls

调用 r2snow

我建议使用 r2decr2retdec

而不是 r2snow

安装r2dec:

$ r2pm -i r2dec

然后简单地使用 pdd:

$ r2 -A my_file
...
[0x00000540]> s main
[0x000006a4]> pdd
int32_t main () {
    /* arg1 */
    *(local_14h) = edi;
    /* arg2 */
    *(local_20h) = rsi;
    esi = 7;
    edi = 0x61;
    print_it (*(local_20h), *(local_14h));
    esi = 0x11;
    edi = 0x6b;
    print_it (edi, esi);
    *(local_4h) = 5;
    edx = *(local_4h);
    eax = edx;
    eax += eax;
    eax += edx;
    *(local_4h) = eax;
    eax = *(local_4h);
    edi = eax;
    dumb_function (edi);
    esi = 9;
    edi = 0x62;
    print_it (edi, esi);
    eax = 0;
    return eax;
}

安装r2retdec:

$ r2pm -i r2retdec

确保已安装 npm 并按照 repository 中的说明进行操作。 安装后,在 r2 shell.

中使用 $dec