Add initial support for hooks

This commit is contained in:
Maschell 2020-05-29 17:37:01 +02:00
parent 6b7ccf7e95
commit 67582c8e1d
3 changed files with 65 additions and 0 deletions

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@ -3,5 +3,6 @@
#include "wums/common.h" #include "wums/common.h"
#include "wums/exports.h" #include "wums/exports.h"
#include "wums/hooks.h"
#endif /* WUMS_H_ */ #endif /* WUMS_H_ */

58
include/wums/hooks.h Normal file
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@ -0,0 +1,58 @@
/* based on blsug.h
* by Alex Chadwick
*
* Copyright (C) 2014, Alex Chadwick
* Modified by Maschell, 2018-2020
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#pragma once
#include "common.h"
#ifdef __cplusplus
extern "C" {
#endif
#define WUMS_HOOK_EX(type_def,original_func) \
extern const wums_hook_t wums_hooks_ ## original_func WUMS_SECTION("hooks"); \
const wums_hook_t wums_hooks_ ## original_func = { \
.type = type_def, \
.target = (const void*)&(original_func) \
}
typedef enum wums_hook_type_t {
WUMS_HOOK_INIT, /* Called when exiting the plugin loader */
} wums_hook_type_t;
typedef struct wums_hook_t {
wums_hook_type_t type; /* Defines the type of the hook */
const void *target; /* Address of our own, new function */
} wums_hook_t;
#define WUMS_INITIALIZE() \
void init_module(void);\
WUMS_HOOK_EX(WUMS_HOOK_INIT,init_module); \
void init_module()
#ifdef __cplusplus
}
#endif

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@ -456,10 +456,16 @@ SECTIONS
*(.wums.meta*) *(.wums.meta*)
KEEP(*(.wums.meta*)) KEEP(*(.wums.meta*))
} > datamem } > datamem
.wums.exports : { .wums.exports : {
*(.wums.exports*) *(.wums.exports*)
KEEP(*(.wums.exports*)) KEEP(*(.wums.exports*))
} > datamem } > datamem
.wums.hooks : {
*(.wums.hooks*)
KEEP(*(.wums.hooks*))
} > datamem
/DISCARD/ : { /DISCARD/ : {
*(.abs) *(.abs)