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bHook在部分系统上面会报“替换 GOT 值之前，通过 dladdr() 验证函数地址失败。”错误码19 #95

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yuanwofei opened this issue Mar 25, 2024 · 2 comments
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bHook在部分系统上面会报“替换 GOT 值之前，通过 dladdr() 验证函数地址失败。”错误码19 #95

yuanwofei opened this issue Mar 25, 2024 · 2 comments
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@yuanwofei
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bytehook Version

1.0.10

Android OS Version

Android 14

Android ABIs

arm64-v8a

Device Manufacturers and Models

小米 13 Android 14和Pixel 3XL Android 12

Describe the Bug

bHook在部分系统上面会报“替换 GOT 值之前，通过 dladdr() 验证函数地址失败。” 错误码19，屏蔽下面这块代码
image
能绕过这个报错。

另外屏蔽这块代码之后，后续的hook是成功的，看起来不需要verify the GOT value这个步骤也是可以的。不清楚是不是verify the GOT value这块代码在部分系统上面有兼容问题？
@yuanwofei yuanwofei added the bug Something isn't working label Mar 25, 2024
@caikelun
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这个机制是为了防止“在bytehook hook之前，这个GOT项中的地址值已经被其他PLT hook逻辑修改了”，如果遇到这种情况，bytehook再去修改一次是可以的，但是一个进程中存在多个plt hook逻辑是不太合理的，所以目前是返回errno，需要使用者排查一下，比如可以在bytehook hook之前，先打印一下这个GOT位置的地址值，看看是不是符合预期，还是被hook了。

@yuanwofei
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可能是，我同时使用了xHook和bHook，我屏蔽其中一个看看

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@caikelun @yuanwofei