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plugins name lookup

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This commit is contained in:
vaxerski 2023-03-31 18:36:44 +01:00
parent 8446e69a76
commit 5e20a32754
1 changed files with 6 additions and 17 deletions
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pages/Plugins/Development/Advanced.md
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@ -79,7 +79,8 @@ APICALL EXPORT PLUGIN_DESCRIPTION_INFO PLUGIN_INIT(HANDLE handle) {
}
```
For private functions or members, you will need to use the signature, for example for `CInputManager::processMouseDownNormal`:
For private functions or members, you can use the `findFunctionsByName` API entry to list all functions matching your query,
for example:
```cpp
typedef void (*origMouseDownNormal)(void*, wlr_pointer_button_event*);
@ -93,8 +94,8 @@ void hkProcessMouseDownNormal(void* thisptr, wlr_pointer_button_event* e) {
APICALL EXPORT PLUGIN_DESCRIPTION_INFO PLUGIN_INIT(HANDLE handle) {
// stuff...
g_pMouseDownHook = HyprlandAPI::createFunctionHook(
PHANDLE, HyprlandAPI::getFunctionAddressFromSignature(PHANDLE, "_ZN13CInputManager22processMouseDownNormalEP24wlr_pointer_button_event"), (void*)&hkProcessMouseDownNormal);
static const auto METHODS = HyprlandAPI::findFunctionsByName(PHANDLE, "processMouseDownNormal");
g_pMouseDownHook = HyprlandAPI::createFunctionHook(PHANDLE, METHODS[0].address, (void*)&hkProcessMouseDownNormal);
g_pMouseDownHook->hook();
@ -102,21 +103,9 @@ APICALL EXPORT PLUGIN_DESCRIPTION_INFO PLUGIN_INIT(HANDLE handle) {
}
```
To get the signature, compile Hyprland and run `objdump -D ./path/to/Hyprland | grep "functionName"`
When it finally spits out something, you can stop it with `ctrl+C`.
Example output:
```
9710b9: eb 01 jmp 9710bc <_ZN13CInputManager22processMouseDownNormalEP24wlr_pointer_button_event+0xed8>
9710c3: 74 37 je 9710fc <_ZN13CInputManager22processMouseDownNormalEP24wlr_pointer_button_event+0xf18>
9710fa: eb 1f jmp 97111b <_ZN13CInputManager22processMouseDownNormalEP24wlr_pointer_button_event+0xf37>
971128: 74 05 je 97112f <_ZN13CInputManager22processMouseDownNormalEP24wlr_pointer_button_event+0xf4b>
```
From this, we can see the signature is `_ZN13CInputManager22processMouseDownNormalEP24wlr_pointer_button_event`.
{{< hint type=warning >}}
Please note signatures may and most likely will differ between compilers. (gcc/clang)
Please note method lookups are slow and should not be used often. The entries _will not_ change during runtime, so it's a good idea
to make the lookups `static`.
{{</ hint >}}
## Using the config