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Comments (7)

caikelun avatar caikelun commented on August 17, 2024

抱歉，这段时间项目太紧张了，没有及时回复github上的问题。

  1. 使用gnu hash时，也会有一部分放在undef中的，如果不遍历undef，有些符号会找不到的。

  2. 目前没有这个打算哦，4.x还是有一定量的，比如我厂的app就还没有放弃4.x。另外，还有不少老旧的tv盒子在使用4.x的安卓系统的，tv盒子的换代周期是比较长的。。。

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liudongmiao avatar liudongmiao commented on August 17, 2024

好的，谢谢～

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liudongmiao avatar liudongmiao commented on August 17, 2024

乌龙了，请忽略

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caikelun avatar caikelun commented on August 17, 2024

嗯嗯，我目前还没有在Android Q里试过。

“android q 里也提到了这个改动。”

这个有什么文档或者出处吗？能贴个链接吗？

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caikelun avatar caikelun commented on August 17, 2024

乌龙了，请忽略

好吧。还是感谢你的关注。

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liudongmiao avatar liudongmiao commented on August 17, 2024

android q beta 2 出来了，这次应该要挂。当然，自己的库没事。

在 Android P 上，找 jniRegisterNativeMethods 时：

found jniRegisterNativeMethods(plt+2) in /system/lib64/libandroid_runtime.so, 0x777466e090 -> 0x77749203bc

maps 文件为：

777445b000-777463f000 r-xp 00000000 fd:00 2194                           /system/lib64/libandroid_runtime.so
7774656000-7774675000 r--p 001f1000 fd:00 2194                           /system/lib64/libandroid_runtime.so
7774675000-7774676000 rw-p 00210000 fd:00 2194                           /system/lib64/libandroid_runtime.so

777491e000-7774924000 r-xp 00000000 fd:00 2113                           /system/lib64/libnativehelper.so
777493d000-777493e000 r--p 0000f000 fd:00 2113                           /system/lib64/libnativehelper.so
777493e000-777493f000 rw-p 00010000 fd:00 2113                           /system/lib64/libnativehelper.so

可以看到，0x777466e090 在 libandroid_runtime.so 中 r+p 那一行范围内，而值 0x77749203bc 也在 libnativehelper.so 中 r+xp 那一行范围内。

而到了 android q beta 2，找 jniRegisterNativeMethods 时：

found jniRegisterNativeMethods(plt+1) in /system/lib64/libandroid_runtime.so, 0x7db396c740 -> 0x7db15fb014

整个 maps 相关文件：

7db3787000-7db3844000 r--p 00000000 fd:03 2462                           /system/lib64/libandroid_runtime.so

7db15fe000-7db15ff000 r--p 00006000 07:18 109                            /apex/com.android.runtime/lib64/libnativehelper.so

我没有接入 xHook，直接使用的 dl_iterate_phdr。在 android q beta 2 中实际能不能从 7db3787000-7db3844000 范围中找到 plt 表，没有实际验证。但是就 dl_iterate_phdr 结果来看，应该是无法找到的。

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liudongmiao avatar liudongmiao commented on August 17, 2024

补充说明下，如果是自己的库，没有问题。
dl_iterate_phdr 给出的结果，均在 maps 文件中体现。

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