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KytyPS5/src/common/platform/sysWindowsVirtual.cpp
T
nmzik 5b2935e36c remove the extra virtual memory layer
2026-09-17 20:35:36 +04:00

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#include "common/common.h"
#if KYTY_PLATFORM != KYTY_PLATFORM_WINDOWS
// #error "KYTY_PLATFORM != KYTY_PLATFORM_WINDOWS"
#else
#ifndef NOMINMAX
#define NOMINMAX
#endif
#include <windows.h> // IWYU pragma: keep
#include "common/assert.h"
#include "common/virtualMemory.h"
// IWYU pragma: no_include <basetsd.h>
// IWYU pragma: no_include <errhandlingapi.h>
// IWYU pragma: no_include <memoryapi.h>
// IWYU pragma: no_include <minwindef.h>
// IWYU pragma: no_include <processthreadsapi.h>
// IWYU pragma: no_include <winbase.h>
// IWYU pragma: no_include <winerror.h>
// IWYU pragma: no_include <wtypes.h>
namespace Common::VirtualMemory {
static DWORD GetProtectionFlag(Mode mode) {
DWORD protect = PAGE_NOACCESS;
switch (mode) {
case Mode::Read: protect = PAGE_READONLY; break;
case Mode::Write:
case Mode::ReadWrite: protect = PAGE_READWRITE; break;
case Mode::Execute: protect = PAGE_EXECUTE; break;
case Mode::ExecuteRead: protect = PAGE_EXECUTE_READ; break;
case Mode::ExecuteWrite:
case Mode::ExecuteReadWrite: protect = PAGE_EXECUTE_READWRITE; break;
case Mode::NoAccess:
default: protect = PAGE_NOACCESS; break;
}
return protect;
}
void Init() {}
uint64_t Alloc(uint64_t address, uint64_t size, Mode mode) {
auto ptr = (address == 0 ? AllocAligned(address, size, mode, 1)
: reinterpret_cast<uintptr_t>(VirtualAlloc(
reinterpret_cast<LPVOID>(static_cast<uintptr_t>(address)), size,
static_cast<DWORD>(MEM_COMMIT) | static_cast<DWORD>(MEM_RESERVE),
GetProtectionFlag(mode))));
if (ptr == 0) {
auto err = static_cast<uint32_t>(GetLastError());
if (err != ERROR_INVALID_ADDRESS) {
printf("VirtualAlloc() failed: 0x%08" PRIx32 "\n", err);
} else {
return AllocAligned(address, size, mode, 1);
}
}
return ptr;
}
using VirtualAlloc2_func_t = /*WINBASEAPI*/ PVOID WINAPI (*)(HANDLE, PVOID, SIZE_T, ULONG, ULONG,
MEM_EXTENDED_PARAMETER*, ULONG);
static VirtualAlloc2_func_t ResolveVirtualAlloc2() {
HMODULE h = GetModuleHandle("KernelBase"); // @suppress("Invalid arguments")
if (h != nullptr) {
return reinterpret_cast<VirtualAlloc2_func_t>(GetProcAddress(h, "VirtualAlloc2"));
}
return nullptr;
}
static uint64_t AlignUp(uint64_t addr, uint64_t alignment) {
return (addr + alignment - 1) & ~(alignment - 1);
}
uint64_t AllocAligned(uint64_t address, uint64_t size, Mode mode, uint64_t alignment) {
if (alignment == 0) {
printf("VirtualAlloc2 failed: 0x%08" PRIx32 "\n", static_cast<uint32_t>(GetLastError()));
return 0;
}
static constexpr uint64_t SYSTEM_MANAGED_MIN = 0x0000040000u;
static constexpr uint64_t SYSTEM_MANAGED_MAX = 0x07FFFFBFFFu;
static constexpr uint64_t USER_MIN = 0x1000000000u;
static constexpr uint64_t USER_MAX = 0xFBFFFFFFFFu;
MEM_ADDRESS_REQUIREMENTS req {};
MEM_EXTENDED_PARAMETER param {};
req.LowestStartingAddress =
(address == 0 ? reinterpret_cast<PVOID>(SYSTEM_MANAGED_MIN)
: reinterpret_cast<PVOID>(AlignUp(address, alignment)));
req.HighestEndingAddress = (address == 0 ? reinterpret_cast<PVOID>(SYSTEM_MANAGED_MAX)
: reinterpret_cast<PVOID>(USER_MAX));
req.Alignment = alignment;
param.Type = MemExtendedParameterAddressRequirements;
param.Pointer = &req;
MEM_ADDRESS_REQUIREMENTS req2 {};
MEM_EXTENDED_PARAMETER param2 {};
req2.LowestStartingAddress =
(address == 0 ? reinterpret_cast<PVOID>(USER_MIN)
: reinterpret_cast<PVOID>(AlignUp(address, alignment)));
req2.HighestEndingAddress = reinterpret_cast<PVOID>(USER_MAX);
req2.Alignment = alignment;
param2.Type = MemExtendedParameterAddressRequirements;
param2.Pointer = &req2;
static auto virtual_alloc2 = ResolveVirtualAlloc2();
EXIT_NOT_IMPLEMENTED(virtual_alloc2 == nullptr);
auto ptr = reinterpret_cast<uintptr_t>(
virtual_alloc2(GetCurrentProcess(), nullptr, size,
static_cast<DWORD>(MEM_COMMIT) | static_cast<DWORD>(MEM_RESERVE),
GetProtectionFlag(mode), &param, 1));
if (ptr == 0) {
ptr = reinterpret_cast<uintptr_t>(
virtual_alloc2(GetCurrentProcess(), nullptr, size,
static_cast<DWORD>(MEM_COMMIT) | static_cast<DWORD>(MEM_RESERVE),
GetProtectionFlag(mode), &param2, 1));
}
if (ptr == 0) {
auto err = static_cast<uint32_t>(GetLastError());
if (err != ERROR_INVALID_PARAMETER) {
printf("VirtualAlloc2(alignment = 0x%016" PRIx64 ") failed: 0x%08" PRIx32 "\n",
alignment, err);
} else {
return AllocAligned(address, size, mode, alignment << 1u);
}
}
return ptr;
}
bool AllocFixed(uint64_t address, uint64_t size, Mode mode) {
auto ptr = reinterpret_cast<uintptr_t>(VirtualAlloc(
reinterpret_cast<LPVOID>(static_cast<uintptr_t>(address)), size,
static_cast<DWORD>(MEM_COMMIT) | static_cast<DWORD>(MEM_RESERVE), GetProtectionFlag(mode)));
if (ptr == 0) {
auto err = static_cast<uint32_t>(GetLastError());
printf("VirtualAlloc() failed: 0x%08" PRIx32 "\n", err);
return false;
}
if (ptr != address) {
printf("VirtualAlloc() failed: wrong address\n");
VirtualFree(reinterpret_cast<LPVOID>(ptr), 0, MEM_RELEASE);
return false;
}
return true;
}
bool Commit(uint64_t address, uint64_t size, Mode mode) {
auto ptr = reinterpret_cast<uintptr_t>(
VirtualAlloc(reinterpret_cast<LPVOID>(static_cast<uintptr_t>(address)), size,
static_cast<DWORD>(MEM_COMMIT), GetProtectionFlag(mode)));
if (ptr == 0) {
printf("VirtualAlloc(MEM_COMMIT) failed: 0x%08" PRIx32 "\n",
static_cast<uint32_t>(GetLastError()));
return false;
}
if (ptr != address) {
printf("VirtualAlloc(MEM_COMMIT) failed: wrong address\n");
return false;
}
return true;
}
uint64_t Reserve(uint64_t address, uint64_t size) {
auto ptr = (address == 0 ? ReserveAligned(address, size, 1)
: reinterpret_cast<uintptr_t>(VirtualAlloc(
reinterpret_cast<LPVOID>(static_cast<uintptr_t>(address)), size,
static_cast<DWORD>(MEM_RESERVE), PAGE_NOACCESS)));
if (ptr == 0) {
auto err = static_cast<uint32_t>(GetLastError());
if (err != ERROR_INVALID_ADDRESS) {
printf("VirtualAlloc(MEM_RESERVE) failed: 0x%08" PRIx32 "\n", err);
} else {
return ReserveAligned(address, size, 1);
}
}
return ptr;
}
uint64_t ReserveAligned(uint64_t address, uint64_t size, uint64_t alignment) {
if (alignment == 0) {
printf("VirtualAlloc2(MEM_RESERVE) failed: 0x%08" PRIx32 "\n",
static_cast<uint32_t>(GetLastError()));
return 0;
}
static constexpr uint64_t SYSTEM_MANAGED_MIN = 0x0000040000u;
static constexpr uint64_t SYSTEM_MANAGED_MAX = 0x07FFFFBFFFu;
static constexpr uint64_t USER_MIN = 0x1000000000u;
static constexpr uint64_t USER_MAX = 0xFBFFFFFFFFu;
MEM_ADDRESS_REQUIREMENTS req {};
MEM_EXTENDED_PARAMETER param {};
req.LowestStartingAddress =
(address == 0 ? reinterpret_cast<PVOID>(SYSTEM_MANAGED_MIN)
: reinterpret_cast<PVOID>(AlignUp(address, alignment)));
req.HighestEndingAddress = (address == 0 ? reinterpret_cast<PVOID>(SYSTEM_MANAGED_MAX)
: reinterpret_cast<PVOID>(USER_MAX));
req.Alignment = alignment;
param.Type = MemExtendedParameterAddressRequirements;
param.Pointer = &req;
MEM_ADDRESS_REQUIREMENTS req2 {};
MEM_EXTENDED_PARAMETER param2 {};
req2.LowestStartingAddress =
(address == 0 ? reinterpret_cast<PVOID>(USER_MIN)
: reinterpret_cast<PVOID>(AlignUp(address, alignment)));
req2.HighestEndingAddress = reinterpret_cast<PVOID>(USER_MAX);
req2.Alignment = alignment;
param2.Type = MemExtendedParameterAddressRequirements;
param2.Pointer = &req2;
static auto virtual_alloc2 = ResolveVirtualAlloc2();
EXIT_NOT_IMPLEMENTED(virtual_alloc2 == nullptr);
auto ptr = reinterpret_cast<uintptr_t>(virtual_alloc2(GetCurrentProcess(), nullptr, size,
static_cast<DWORD>(MEM_RESERVE),
PAGE_NOACCESS, &param, 1));
if (ptr == 0) {
ptr = reinterpret_cast<uintptr_t>(virtual_alloc2(GetCurrentProcess(), nullptr, size,
static_cast<DWORD>(MEM_RESERVE),
PAGE_NOACCESS, &param2, 1));
}
if (ptr == 0) {
auto err = static_cast<uint32_t>(GetLastError());
if (err != ERROR_INVALID_PARAMETER) {
printf("VirtualAlloc2(MEM_RESERVE, alignment = 0x%016" PRIx64 ") failed: 0x%08" PRIx32
"\n",
alignment, err);
} else {
return ReserveAligned(address, size, alignment << 1u);
}
}
return ptr;
}
bool ReserveFixed(uint64_t address, uint64_t size) {
auto ptr = reinterpret_cast<uintptr_t>(
VirtualAlloc(reinterpret_cast<LPVOID>(static_cast<uintptr_t>(address)), size,
static_cast<DWORD>(MEM_RESERVE), PAGE_NOACCESS));
if (ptr == 0) {
printf("VirtualAlloc(MEM_RESERVE) failed: address=0x%016" PRIx64 ", size=0x%016" PRIx64
", err=0x%08" PRIx32 "\n",
address, size, static_cast<uint32_t>(GetLastError()));
return false;
}
if (ptr != address) {
printf("VirtualAlloc(MEM_RESERVE) failed: wrong address\n");
VirtualFree(reinterpret_cast<LPVOID>(ptr), 0, MEM_RELEASE);
return false;
}
return true;
}
bool Decommit(uint64_t address, uint64_t size) {
if (VirtualFree(reinterpret_cast<LPVOID>(static_cast<uintptr_t>(address)), size,
MEM_DECOMMIT) == 0) {
printf("VirtualFree(MEM_DECOMMIT) failed: 0x%08" PRIx32 "\n",
static_cast<uint32_t>(GetLastError()));
return false;
}
return true;
}
bool Free(uint64_t address) {
if (VirtualFree(reinterpret_cast<LPVOID>(static_cast<uintptr_t>(address)), 0, MEM_RELEASE) ==
0) {
printf("VirtualFree() failed: 0x%08" PRIx32 "\n", static_cast<uint32_t>(GetLastError()));
return false;
}
return true;
}
bool FreeRange(uint64_t address, uint64_t size) {
if (address == 0 || size == 0) {
return false;
}
uint64_t current = address;
while (current - address < size) {
MEMORY_BASIC_INFORMATION info {};
if (VirtualQuery(reinterpret_cast<const void*>(current), &info, sizeof(info)) == 0 ||
reinterpret_cast<uint64_t>(info.AllocationBase) != address || info.State == MEM_FREE) {
return false;
}
const auto next = reinterpret_cast<uint64_t>(info.BaseAddress) + info.RegionSize;
if (next <= current || next - address > size) {
return false;
}
current = next;
}
return current - address == size && Free(address);
}
bool Protect(uint64_t address, uint64_t size, Mode mode) {
DWORD old_protect = 0;
if (VirtualProtect(reinterpret_cast<LPVOID>(static_cast<uintptr_t>(address)), size,
GetProtectionFlag(mode), &old_protect) == 0) {
printf("VirtualProtect() failed: 0x%08" PRIx32 "\n", static_cast<uint32_t>(GetLastError()));
return false;
}
return true;
}
bool FlushInstructionCache(uint64_t address, uint64_t size) {
if (::FlushInstructionCache(GetCurrentProcess(),
reinterpret_cast<LPVOID>(static_cast<uintptr_t>(address)),
size) == 0) {
printf("FlushInstructionCache() failed: 0x%08" PRIx32 "\n",
static_cast<uint32_t>(GetLastError()));
return false;
}
return true;
}
} // namespace Common::VirtualMemory
#endif
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