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94 lines
1.8 KiB
C++
94 lines
1.8 KiB
C++
#define WITHWINDOWS
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#include "common.h"
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#include "patcher.h"
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#include <algorithm>
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#include <vector>
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StaticPatcher *StaticPatcher::ms_head;
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StaticPatcher::StaticPatcher(Patcher func)
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: m_func(func)
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{
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m_next = ms_head;
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ms_head = this;
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}
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void
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StaticPatcher::Apply()
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{
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StaticPatcher *current = ms_head;
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while(current){
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current->Run();
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current = current->m_next;
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}
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ms_head = nil;
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}
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#ifdef _WIN32
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std::vector<uint32> usedAddresses;
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static DWORD protect[2];
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static uint32 protect_address;
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static uint32 protect_size;
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void
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Protect_internal(uint32 address, uint32 size)
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{
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protect_address = address;
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protect_size = size;
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VirtualProtect((void*)address, size, PAGE_EXECUTE_READWRITE, &protect[0]);
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}
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void
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Unprotect_internal(void)
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{
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VirtualProtect((void*)protect_address, protect_size, protect[0], &protect[1]);
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}
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void
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InjectHook_internal(uint32 address, uint32 hook, int type)
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{
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if(std::any_of(usedAddresses.begin(), usedAddresses.end(),
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[address](uint32 value) { return value == address; })) {
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debug("Used address %#06x twice when injecting hook\n", address);
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}
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usedAddresses.push_back(address);
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switch(type){
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case PATCH_JUMP:
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VirtualProtect((void*)address, 5, PAGE_EXECUTE_READWRITE, &protect[0]);
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*(uint8*)address = 0xE9;
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break;
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case PATCH_CALL:
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VirtualProtect((void*)address, 5, PAGE_EXECUTE_READWRITE, &protect[0]);
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*(uint8*)address = 0xE8;
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break;
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default:
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VirtualProtect((void*)(address + 1), 4, PAGE_EXECUTE_READWRITE, &protect[0]);
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break;
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}
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*(ptrdiff_t*)(address + 1) = hook - address - 5;
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if(type == PATCH_NOTHING)
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VirtualProtect((void*)(address + 1), 4, protect[0], &protect[1]);
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else
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VirtualProtect((void*)address, 5, protect[0], &protect[1]);
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}
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#else
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void
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Protect_internal(uint32 address, uint32 size)
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{
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}
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void
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Unprotect_internal(void)
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{
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}
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void
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InjectHook_internal(uint32 address, uint32 hook, int type)
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{
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}
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#endif
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