diff options
Diffstat (limited to 'src/core/re3.cpp')
| -rw-r--r-- | src/core/re3.cpp | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/src/core/re3.cpp b/src/core/re3.cpp index 0301a98a..137a890c 100644 --- a/src/core/re3.cpp +++ b/src/core/re3.cpp @@ -22,11 +22,62 @@ #include "Console.h" #include "Debug.h" +#include <algorithm> #include <vector> #include <list> std::vector<int32> usedAddresses; +static DWORD protect[2]; +static uint32 protect_address; +static uint32 protect_size; + +void +Protect_internal(uint32 address, uint32 size) +{ + protect_address = address; + protect_size = size; + VirtualProtect((void*)address, size, PAGE_EXECUTE_READWRITE, &protect[0]); +} + +void +Unprotect_internal(void) +{ + VirtualProtect((void*)protect_address, protect_size, protect[0], &protect[1]); +} + +void +InjectHook_internal(uint32 address, uint32 hook, int type) +{ + if(std::any_of(usedAddresses.begin(), usedAddresses.end(), + [address](uint32 value) { return (int32)value == address; })) { + debug("Used address %#06x twice when injecting hook\n", address); + } + + usedAddresses.push_back((int32)address); + + + switch(type){ + case PATCH_JUMP: + VirtualProtect((void*)address, 5, PAGE_EXECUTE_READWRITE, &protect[0]); + *(uint8*)address = 0xE9; + break; + case PATCH_CALL: + VirtualProtect((void*)address, 5, PAGE_EXECUTE_READWRITE, &protect[0]); + *(uint8*)address = 0xE8; + break; + default: + VirtualProtect((void*)((uint32)address + 1), 4, PAGE_EXECUTE_READWRITE, &protect[0]); + break; + } + + *(ptrdiff_t*)(address + 1) = hook - address - 5; + if(type == PATCH_NOTHING) + VirtualProtect((void*)(address + 1), 4, protect[0], &protect[1]); + else + VirtualProtect((void*)address, 5, protect[0], &protect[1]); +} + void **rwengine = *(void***)0x5A10E1; DebugMenuAPI gDebugMenuAPI; |