11 Commits

Author SHA1 Message Date
topjohnwu
da723b207a Allow 3rd party code to load pre-specializing
Magisk's policy is to never allow 3rd party code to be loaded in the
zygote daemon process so we have 100% control over injection and hiding.
However, this makes it impossible for 3rd party modules to run anything
before process specialization, which includes the ability to modify the
arguments being sent to these original nativeForkAndXXX methods.

The trick here is to fork before calling the original nativeForkAndXXX
methods, and hook `fork` in libandroid_runtime.so to skip the next
invocation; basically, we're moving the responsibility of process
forking to our own hands.
2021-01-10 01:25:30 -08:00
topjohnwu
e050f77198 Don't hook SystemProperties#set
Doesn't seem necessary
2021-01-09 20:39:59 -08:00
topjohnwu
540b4b7ea9 Update pre/post hooks implementation 2021-01-09 17:41:25 -08:00
topjohnwu
bbef22daf7 More macro magic to automate more code 2021-01-09 04:28:26 -08:00
topjohnwu
9ed110c91b Add JNI hooks to critical methods 2021-01-08 05:25:44 -08:00
topjohnwu
a30d510eb1 Use xHook to hook functions in PLT 2021-01-08 00:53:24 -08:00
topjohnwu
ef98eaed8f Proper injection entry and unloading 2021-01-06 23:59:05 -08:00
topjohnwu
2a257f327c Sanitize /proc/PID/environ 2021-01-06 23:41:37 -08:00
topjohnwu
4060c2107c Add preliminary zygote code injection support
Prototyping the injection setup and a clean "self unloading" mechanism.
2021-01-06 22:21:17 -08:00
topjohnwu
cd23d27048 Fix remote_write implementation 2021-01-06 21:56:29 -08:00
topjohnwu
5f2e22a259 Support remote function call with ptrace
End up not used for anything, but keep it for good
2021-01-02 21:29:45 -08:00