92 lines
2.4 KiB
C++
92 lines
2.4 KiB
C++
// Copyright 2014 Dolphin Emulator Project
|
|
// Licensed under GPLv2+
|
|
// Refer to the license.txt file included.
|
|
|
|
#if defined(_WIN32)
|
|
|
|
#include "CommonTypes.h"
|
|
#include <Windows.h>
|
|
|
|
struct PatchInfo {
|
|
const wchar_t *module_name;
|
|
u32 checksum;
|
|
u32 rva;
|
|
u32 length;
|
|
} static const s_patches[] = {
|
|
// 10.0.10240.16384 (th1.150709-1700)
|
|
{ L"ucrtbase.dll", 0xF61ED, 0x6AE7B, 5 },
|
|
// 10.0.10240.16390 (th1_st1.150714-1601)
|
|
{ L"ucrtbase.dll", 0xF5ED9, 0x6AE7B, 5 },
|
|
// 10.0.10137.0 (th1.150602-2238)
|
|
{ L"ucrtbase.dll", 0xF8B5E, 0x63ED6, 2 },
|
|
// 10.0.10150.0 (th1.150616-1659)
|
|
{ L"ucrtbased.dll", 0x1C1915 , 0x91905, 5 },
|
|
};
|
|
|
|
bool ApplyPatch(const PatchInfo &patch) {
|
|
auto module = GetModuleHandleW(patch.module_name);
|
|
if (module == nullptr)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
auto ucrtbase_pe = (PIMAGE_NT_HEADERS)((uintptr_t)module + ((PIMAGE_DOS_HEADER)module)->e_lfanew);
|
|
if (ucrtbase_pe->OptionalHeader.CheckSum != patch.checksum) {
|
|
return false;
|
|
}
|
|
|
|
void *patch_addr = (void *)((uintptr_t)module + patch.rva);
|
|
size_t patch_size = patch.length;
|
|
|
|
DWORD old_protect;
|
|
if (!VirtualProtect(patch_addr, patch_size, PAGE_EXECUTE_READWRITE, &old_protect))
|
|
{
|
|
return false;
|
|
}
|
|
|
|
memset(patch_addr, 0x90, patch_size);
|
|
|
|
VirtualProtect(patch_addr, patch_size, old_protect, &old_protect);
|
|
|
|
FlushInstructionCache(GetCurrentProcess(), patch_addr, patch_size);
|
|
|
|
return true;
|
|
}
|
|
|
|
int __cdecl EnableucrtFreadWorkaround()
|
|
{
|
|
// This patches ucrtbase such that fseek will always
|
|
// synchronize the file object's internal buffer.
|
|
|
|
bool applied_at_least_one = false;
|
|
for (const auto &patch : s_patches) {
|
|
if (ApplyPatch(patch)) {
|
|
applied_at_least_one = true;
|
|
}
|
|
}
|
|
|
|
/* For forward compat, do not fail if patches don't apply (e.g. version mismatch)
|
|
if (!applied_at_least_one) {
|
|
std::abort();
|
|
}
|
|
//*/
|
|
|
|
return 0;
|
|
}
|
|
|
|
// Create a segment which is recognized by the linker to be part of the CRT
|
|
// initialization. XI* = C startup, XC* = C++ startup. "A" placement is reserved
|
|
// for system use. Thus, the earliest we can get is XIB (C startup is before
|
|
// C++).
|
|
#pragma section(".CRT$XIB", read)
|
|
|
|
// Place a symbol in the special segment, make it have C linkage so that
|
|
// referencing it doesn't require ugly decorated names.
|
|
// Use /include:EnableucrtFreadWorkaround linker flag to enable this.
|
|
extern "C" {
|
|
__declspec(allocate(".CRT$XIB"))
|
|
decltype(&EnableucrtFreadWorkaround) ucrtFreadWorkaround = EnableucrtFreadWorkaround;
|
|
};
|
|
|
|
#endif
|