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/**
* @file cdl.h
* @brief cdl86 (Compact Detours Library) - cdl.h
*
* Experimental Linux/Windows x86/x86_64 detours library.
* Author: Dylan Müller
*
* +---------------------------------------+
* | .-. .-. .-. |
* | / \ / \ / \ |
* | / \ / \ / \ / |
* | \ / \ / \ / |
* | "_" "_" "_" |
* | |
* | _ _ _ _ _ _ ___ ___ _ _ |
* | | | | | | | \| | /_\ | _ \ / __| || | |
* | | |_| |_| | .` |/ _ \| /_\__ \ __ | |
* | |____\___/|_|\_/_/ \_\_|_(_)___/_||_| |
* | |
* | |
* | Lunar RF Labs |
* | https://lunar.sh |
* | |
* | Research Laboratories |
* | Copyright (C) 2022-2024 |
* | |
* +---------------------------------------+
*
* Copyright (c) 2022 Lunar RF Labs
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef CDL_H
#define CDL_H
#include <stdbool.h>
#include <stdint.h>
#define __in
#define __out
#define __in_out
/* extern "C" */
#ifdef __cplusplus
#define CDL86_EXTERN_C extern "C"
#else
#define CDL86_EXTERN_C
#endif
/**
* Intruction probe struct
*
* @param size size of instruction (bytes)
* @param bytes byte array of instruction (uint8_t*)
*/
struct cdl_ins_probe
{
int size;
uint8_t* bytes;
};
/**
* JMP patch info struct
*
* @param active is patch active (bool)
* @param nt_alloc number of bytes allocated to trampoline (int)
* @param code instructions replaced by JMP patch (uint8_t*)
* @param target pointer to function pointer (uint8_t**)
* @param origin pointer to origin(real) target address (uint8_t*)
* @param trampoline pointer to trampoline (uint8_t*)
*/
struct cdl_jmp_patch
{
bool active;
int nt_alloc;
uint8_t* code;
uint8_t** target;
uint8_t* origin;
uint8_t* trampoline;
};
/**
* SWBP patch info struct.
*
* @param gid global id for SW BP (int)
* @param active is patch active (bool)
* @param ns_alloc number of bytes allocated to stub (int)
* @param code instructions replaced by SWBP patch (uint8_t*)
* @param target pointer to function pointer (uint8_t**)
* @param stub pointer to stub (uint8_t*)
* @param detour pointer to detour function (uint8_t*)
* @param bp_add address of breakpoint (uint8_t*)
*/
struct cdl_swbp_patch
{
int gid;
bool active;
int ns_alloc;
uint8_t* code;
uint8_t** target;
uint8_t* stub;
uint8_t* detour;
uint8_t* bp_addr;
};
/**
* Attach JMP patch to target funciton.
*
* @param target pointer to function pointer to function to hook.
* @param detour function pointer to detour function
*/
CDL86_EXTERN_C struct cdl_jmp_patch cdl_jmp_attach(
__in_out void** target,
__in void* detour
);
/**
* Attach INT3 patch to target funciton.
*
* @param target pointer to function pointer to function to hook.
* @param detour function pointer to detour function
*/
CDL86_EXTERN_C struct cdl_swbp_patch cdl_swbp_attach(
__in_out void** target,
__in void* detour
);
/**
* Detach JMP patch.
*
* @param jmp_patch pointer to cdl_jmp_patch struct.
*/
CDL86_EXTERN_C void cdl_jmp_detach(
__in_out struct cdl_jmp_patch* jmp_patch
);
/**
* Detach INT3 patch.
*
* @param swbp_patch pointer to cdl_swbp_patch struct.
*/
CDL86_EXTERN_C void cdl_swbp_detach(
__in_out struct cdl_swbp_patch* swbp_patch
);
/**
* Print JMP patch debug info.
*
* @param jmp_patch pointer to cdl_jmp_patch struct.
*/
CDL86_EXTERN_C void cdl_jmp_dbg(
__in struct cdl_jmp_patch* jmp_patch
);
/**
* Print SW BP debug info.
*
* @param jmp_patch pointer to cdl_swbp_patch struct.
*/
CDL86_EXTERN_C void cdl_swbp_dbg(
__in struct cdl_swbp_patch* swbp_patch
);
#endif
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