1033 lines
40 KiB
C
1033 lines
40 KiB
C
// kernel32.c - Win32 personality layer
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//
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// Thin wrappers around syscall.dll stubs that expose a familiar Win32 API
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// surface to user-mode code originally written for Windows.
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//
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// Design notes:
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// - HANDLE is void*; we store the uint32_t kernel handle as a pointer value
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// so Win32 code can pass it around opaquely without knowing its size.
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// HANDLE_TO_KH / KH_TO_HANDLE do that conversion in one place.
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// - INVALID_HANDLE_VALUE maps to kernel handle 0 (the always-invalid slot).
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// - HeapAlloc / HeapFree / HeapReAlloc ignore the HANDLE heap argument and
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// always use the single kernel user-heap. This is fine: we don't expose
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// multiple heaps, and NULL is a legal (no-op) heap argument under Win32.
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// - GetLastError / SetLastError are per-thread on Windows. We keep a single
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// global for now; enough for Bink and similar single-threaded guests.
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// - File I/O uses SYS_OPEN_FILE / SYS_READ_FILE / SYS_SEEK_FILE /
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// SYS_GET_FILE_SIZE / SYS_CLOSE_HANDLE (unified close path - no separate
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// SysCloseFile).
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// - WriteFile / CreateFileA in write-mode / SetEndOfFile are stubs because
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// the VFS has no write path yet.
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#include <stdint.h>
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#include <stddef.h>
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#include <stdbool.h>
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#include <string.h>
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// ---------------------------------------------------------------------------
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// Syscall stubs (from syscall.dll, assembled from syscall_stubs.asm)
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// ---------------------------------------------------------------------------
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extern void* SysAlloc(size_t size);
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extern void SysFree(void* ptr, size_t size);
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extern void* SysRealloc(void* ptr, size_t newSize);
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extern uint32_t SysOpenFile(const char* path, uint32_t* handleOut);
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extern uint32_t SysReadFile(uint32_t handle, void* buf, size_t size, size_t* bytesReadOut);
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extern uint32_t SysSeekFile(uint32_t handle, uint64_t offset);
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extern uint64_t SysGetFileSize(uint32_t handle);
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extern void SysCloseHandle(uint32_t handle);
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extern void SysExitProcess(int exitCode);
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extern void SysExitThread(int exitCode);
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extern uint32_t SysCreateThread(uint64_t entry, uint64_t arg,
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uint32_t priority, uint32_t* tidOut);
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extern uint32_t SysGetCurrentTid(void);
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extern uint32_t SysGetCurrentPid(void);
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extern uint32_t SysCreateProcess(const char* path, uint32_t* handleOut);
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extern uint32_t SysWaitForProcess(uint32_t handle);
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extern uint32_t SysGetProcessExitCode(uint32_t handle, int* exitCodeOut);
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extern char SysKbReadChar(void);
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extern uint32_t SysKbPoll(void);
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extern void SysYield(void);
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extern void SysSleep(uint32_t ms);
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extern uint64_t SysGetTick(void);
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extern void SysDebugPrint(const char* str);
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// ---------------------------------------------------------------------------
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// Types
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// ---------------------------------------------------------------------------
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typedef void* HANDLE;
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typedef unsigned long DWORD;
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typedef int BOOL;
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#define TRUE 1
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#define FALSE 0
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#define INVALID_HANDLE_VALUE ((HANDLE)(uintptr_t)0)
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// CreateFileA disposition / access flags (subset used by Bink and similar)
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#define GENERIC_READ 0x80000000UL
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#define GENERIC_WRITE 0x40000000UL
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#define OPEN_EXISTING 3
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#define CREATE_ALWAYS 2
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#define FILE_BEGIN 0
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#define FILE_CURRENT 1
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#define FILE_END 2
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// HeapAlloc flags
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#define HEAP_ZERO_MEMORY 0x00000008UL
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// ---------------------------------------------------------------------------
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// Handle conversion helpers
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// uint32_t kernel handle <-> opaque Win32 HANDLE
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// Kernel handle 0 == invalid; we map that to INVALID_HANDLE_VALUE (NULL).
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// ---------------------------------------------------------------------------
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static inline HANDLE KH_TO_HANDLE(uint32_t kh) { return (HANDLE)(uintptr_t)kh; }
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static inline uint32_t HANDLE_TO_KH(HANDLE h) { return (uint32_t)(uintptr_t)h; }
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// ---------------------------------------------------------------------------
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// GetLastError / SetLastError (single-threaded stub)
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// ---------------------------------------------------------------------------
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static DWORD gLastError = 0;
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__declspec(dllexport) DWORD GetLastError(void) {
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return gLastError;
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}
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__declspec(dllexport) void SetLastError(DWORD err) {
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gLastError = err;
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}
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// ---------------------------------------------------------------------------
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// Process termination
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// ---------------------------------------------------------------------------
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__declspec(dllexport) _Noreturn void ExitProcess(unsigned int code) {
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SysExitProcess((int)code);
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while (true) ; // unreachable
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}
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// ---------------------------------------------------------------------------
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// Debug output
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// ---------------------------------------------------------------------------
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__declspec(dllexport) void OutputDebugStringA(const char* str) {
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if (str) SysDebugPrint(str);
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}
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// ---------------------------------------------------------------------------
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// Timer
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// ---------------------------------------------------------------------------
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__declspec(dllexport) DWORD GetTickCount(void) {
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return (DWORD)SysGetTick();
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}
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// ---------------------------------------------------------------------------
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// Memory (heap argument is ignored - single kernel user-heap)
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// ---------------------------------------------------------------------------
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__declspec(dllexport) void* HeapAlloc(void* heap, DWORD flags, size_t size) {
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(void)heap;
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if (!size) return NULL;
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void* ptr = SysAlloc(size);
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if (ptr && (flags & HEAP_ZERO_MEMORY))
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memset(ptr, 0, size);
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if (!ptr) gLastError = 8; // ERROR_NOT_ENOUGH_MEMORY
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return ptr;
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}
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__declspec(dllexport) BOOL HeapFree(void* heap, DWORD flags, void* ptr) {
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(void)heap; (void)flags;
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// Win32's HeapFree doesn't need the size; we pass 0 and the kernel's
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// allocator handles it (the block header carries the size).
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if (ptr) SysFree(ptr, 0);
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return TRUE;
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}
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__declspec(dllexport) void* HeapReAlloc(void* heap, DWORD flags,
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void* ptr, size_t size) {
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(void)heap; (void)flags;
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void* newptr = SysRealloc(ptr, size);
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if (!newptr && size) gLastError = 8;
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return newptr;
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}
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// GetProcessHeap - return a sentinel non-NULL value so callers can pass it
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// back into HeapAlloc/HeapFree without crashing (we ignore it anyway).
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__declspec(dllexport) void* GetProcessHeap(void) {
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return (void*)1;
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}
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// ---------------------------------------------------------------------------
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// Locale / code-page stubs
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// ---------------------------------------------------------------------------
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__declspec(dllexport) int MultiByteToWideChar(unsigned int cp, DWORD flags,
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const char* src, int srcLen,
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unsigned short* dst, int dstLen) {
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(void)cp; (void)flags;
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// Trivial ASCII -> UTF-16LE expansion, good enough for English strings.
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if (!src || !dstLen) return 0;
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if (srcLen < 0) srcLen = (int)strlen(src) + 1;
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int out = 0;
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while (out < dstLen && out < srcLen) {
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if (dst) dst[out] = (unsigned short)(unsigned char)src[out];
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out++;
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}
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return out;
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}
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__declspec(dllexport) int WideCharToMultiByte(unsigned int cp, DWORD flags,
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const unsigned short* src, int srcLen,
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char* dst, int dstLen,
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const char* defChar, int* usedDefault) {
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(void)cp; (void)flags; (void)defChar;
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if (usedDefault) *usedDefault = FALSE;
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if (!src || !dstLen) return 0;
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if (srcLen < 0) {
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srcLen = 0;
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while (src[srcLen]) srcLen++;
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srcLen++;
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}
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int out = 0;
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while (out < dstLen && out < srcLen) {
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if (dst) dst[out] = (char)(src[out] < 128 ? src[out] : '?');
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out++;
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}
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return out;
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}
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__declspec(dllexport) DWORD GetACP(void) { return 1252; } // Windows-1252
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__declspec(dllexport) DWORD GetOEMCP(void) { return 437; } // DOS Latin US
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// ---------------------------------------------------------------------------
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// File I/O
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// ---------------------------------------------------------------------------
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// CreateFileA - open an existing file for reading.
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// Write access, CREATE_ALWAYS and other modes return INVALID_HANDLE_VALUE
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// because the VFS has no write path yet.
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__declspec(dllexport) HANDLE CreateFileA(const char* name,
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DWORD access, DWORD share,
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void* sa, DWORD disposition,
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DWORD flags, void* templ) {
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(void)share; (void)sa; (void)flags; (void)templ;
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// Only OPEN_EXISTING + read supported for now.
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if (disposition != OPEN_EXISTING || (access & GENERIC_WRITE)) {
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gLastError = 5; // ERROR_ACCESS_DENIED
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return INVALID_HANDLE_VALUE;
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}
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uint32_t kh = 0;
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uint32_t s = SysOpenFile(name, &kh);
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if (s != 0 /* STATUS_SUCCESS */) {
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gLastError = 2; // ERROR_FILE_NOT_FOUND
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return INVALID_HANDLE_VALUE;
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}
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return KH_TO_HANDLE(kh);
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}
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// GetFileSize - fills optional high-DWORD pointer, returns low DWORD.
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// Returns 0xFFFFFFFF on error, matching Win32 behaviour.
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__declspec(dllexport) DWORD GetFileSize(HANDLE hFile, DWORD* fileSizeHigh) {
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if (!hFile) { gLastError = 6; return 0xFFFFFFFFUL; } // ERROR_INVALID_HANDLE
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uint64_t sz = SysGetFileSize(HANDLE_TO_KH(hFile));
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if (fileSizeHigh) *fileSizeHigh = (DWORD)(sz >> 32);
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return (DWORD)(sz & 0xFFFFFFFFULL);
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}
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// ReadFile - sequential read at the file's current position.
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// Overlapped is not supported (must be NULL).
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__declspec(dllexport) BOOL ReadFile(HANDLE hFile, void* buf, DWORD toRead,
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DWORD* bytesRead, void* overlapped) {
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(void)overlapped;
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if (!hFile || !buf) { gLastError = 6; return FALSE; }
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size_t got = 0;
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uint32_t s = SysReadFile(HANDLE_TO_KH(hFile), buf, (size_t)toRead, &got);
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if (bytesRead) *bytesRead = (DWORD)got;
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if (s != 0) { gLastError = 1; return FALSE; } // ERROR_INVALID_FUNCTION
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return TRUE;
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}
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// SetFilePointer - seek to an absolute or relative position.
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// Returns new position low DWORD, or 0xFFFFFFFF on error.
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__declspec(dllexport) DWORD SetFilePointer(HANDLE hFile, long dist,
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long* distHigh, DWORD method) {
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if (!hFile) { gLastError = 6; return 0xFFFFFFFFUL; }
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uint64_t offset = 0;
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if (method == FILE_BEGIN) {
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offset = (uint64_t)(int64_t)dist;
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if (distHigh) offset |= (uint64_t)(uint32_t)*distHigh << 32;
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} else if (method == FILE_CURRENT || method == FILE_END) {
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// FILE_CURRENT and FILE_END require knowing the current offset or
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// the file size; expose as unsupported for now.
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gLastError = 1; // ERROR_INVALID_FUNCTION
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return 0xFFFFFFFFUL;
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} else {
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gLastError = 87; // ERROR_INVALID_PARAMETER
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return 0xFFFFFFFFUL;
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}
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uint32_t s = SysSeekFile(HANDLE_TO_KH(hFile), offset);
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if (s != 0) { gLastError = 1; return 0xFFFFFFFFUL; }
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if (distHigh) *distHigh = (long)(offset >> 32);
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return (DWORD)(offset & 0xFFFFFFFFULL);
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}
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// CloseHandle - unified close for files, mutexes, semaphores, events, queues.
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__declspec(dllexport) BOOL CloseHandle(HANDLE hObject) {
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if (!hObject) { gLastError = 6; return FALSE; }
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SysCloseHandle(HANDLE_TO_KH(hObject));
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return TRUE;
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}
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// WriteFile stub - no write VFS support yet.
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__declspec(dllexport) BOOL WriteFile(HANDLE hFile, const void* buf, DWORD toWrite,
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DWORD* bytesWritten, void* overlapped) {
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(void)hFile; (void)buf; (void)toWrite; (void)overlapped;
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if (bytesWritten) *bytesWritten = 0;
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gLastError = 1; // ERROR_INVALID_FUNCTION
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return FALSE;
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}
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// ===========================================================================
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// Extended shims – funcs.txt additions
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// All functions here return plausible values; no real implementation exists
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// unless a matching syscall stub is available.
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// ===========================================================================
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// ---------------------------------------------------------------------------
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// Additional Heap APIs
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// We have one kernel heap; the HANDLE is always ignored.
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// ---------------------------------------------------------------------------
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typedef int HEAP_INFORMATION_CLASS; // opaque
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__declspec(dllexport) HANDLE HeapCreate(DWORD flOptions,
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size_t dwInitialSize,
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size_t dwMaximumSize) {
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(void)flOptions; (void)dwInitialSize; (void)dwMaximumSize;
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return (HANDLE)(uintptr_t)1; // non-NULL sentinel
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}
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__declspec(dllexport) BOOL HeapDestroy(HANDLE hHeap) {
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(void)hHeap;
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return TRUE;
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}
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__declspec(dllexport) size_t HeapSize(HANDLE heap, DWORD flags, const void* ptr) {
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(void)heap; (void)flags; (void)ptr;
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return (size_t)-1; // Win32 returns (SIZE_T)-1 on error / unsupported
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}
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__declspec(dllexport) BOOL HeapSetInformation(HANDLE HeapHandle,
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HEAP_INFORMATION_CLASS cls,
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void* info, size_t infoLen) {
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(void)HeapHandle; (void)cls; (void)info; (void)infoLen;
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return TRUE;
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}
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// ---------------------------------------------------------------------------
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// Process & Module pseudo-handles / queries
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// ---------------------------------------------------------------------------
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// Pseudo-handles matching Windows convention: -1 = process, -2 = thread.
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__declspec(dllexport) HANDLE GetCurrentProcess(void) {
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return (HANDLE)(uintptr_t)(~(uintptr_t)0);
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}
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__declspec(dllexport) HANDLE GetCurrentThread(void) {
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return (HANDLE)(uintptr_t)(~(uintptr_t)1);
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}
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__declspec(dllexport) DWORD GetCurrentThreadId(void) { return (DWORD)SysGetCurrentTid(); }
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__declspec(dllexport) DWORD GetCurrentProcessId(void) { return (DWORD)SysGetCurrentPid(); }
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// GetModuleHandleA/W – no PE map; return NULL so callers that check can fail
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// gracefully. GetModuleHandleA(NULL) on Windows returns the exe base; we
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// return a recognisable non-NULL sentinel so code that just passes it to
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// GetProcAddress doesn't immediately crash.
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__declspec(dllexport) HANDLE GetModuleHandleA(const char* lpModuleName) {
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return lpModuleName ? NULL : (HANDLE)(uintptr_t)0x00400000UL;
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}
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__declspec(dllexport) HANDLE GetModuleHandleW(const unsigned short* lpModuleName) {
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return lpModuleName ? NULL : (HANDLE)(uintptr_t)0x00400000UL;
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}
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// GetProcAddress – no dynamic linker; always fail.
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__declspec(dllexport) void* GetProcAddress(HANDLE hModule, const char* lpProcName) {
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(void)hModule; (void)lpProcName;
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gLastError = 127; // ERROR_PROC_NOT_FOUND
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return NULL;
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}
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// LoadLibraryA – no dynamic loader; always fail.
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__declspec(dllexport) HANDLE LoadLibraryA(const char* lpLibFileName) {
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(void)lpLibFileName;
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gLastError = 2; // ERROR_FILE_NOT_FOUND
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return NULL;
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}
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__declspec(dllexport) BOOL FreeLibrary(HANDLE hLibModule) {
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(void)hLibModule;
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return TRUE;
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}
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__declspec(dllexport) DWORD GetModuleFileNameA(HANDLE hModule,
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char* lpFilename, DWORD nSize) {
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(void)hModule;
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if (lpFilename && nSize) lpFilename[0] = '\0';
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return 0;
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}
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__declspec(dllexport) BOOL TerminateProcess(HANDLE hProcess, unsigned int uExitCode) {
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(void)hProcess;
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SysExitProcess((int)uExitCode);
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while (true) ;
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}
|
||
|
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// STARTUPINFOA – only cb matters for our stub.
|
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typedef struct {
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DWORD cb;
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||
char* lpReserved;
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char* lpDesktop;
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char* lpTitle;
|
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DWORD dwX, dwY, dwXSize, dwYSize;
|
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DWORD dwXCountChars, dwYCountChars;
|
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DWORD dwFillAttribute, dwFlags;
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unsigned short wShowWindow, cbReserved2;
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unsigned char* lpReserved2;
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||
HANDLE hStdInput, hStdOutput, hStdError;
|
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} STARTUPINFOA;
|
||
|
||
__declspec(dllexport) void GetStartupInfoA(STARTUPINFOA* lpStartupInfo) {
|
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if (!lpStartupInfo) return;
|
||
// Zero every field, then set the mandatory cb.
|
||
unsigned char* p = (unsigned char*)lpStartupInfo;
|
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for (size_t i = 0; i < sizeof(*lpStartupInfo); i++) p[i] = 0;
|
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lpStartupInfo->cb = (DWORD)sizeof(*lpStartupInfo);
|
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}
|
||
|
||
__declspec(dllexport) char* GetCommandLineA(void) {
|
||
// Return a valid but empty-ish command line.
|
||
static char cmdline[4] = "";
|
||
return cmdline;
|
||
}
|
||
|
||
// ---------------------------------------------------------------------------
|
||
// Threading
|
||
// ---------------------------------------------------------------------------
|
||
|
||
#define WAIT_OBJECT_0 0x00000000UL
|
||
#define WAIT_TIMEOUT 0x00000102UL
|
||
#define INFINITE 0xFFFFFFFFUL
|
||
|
||
__declspec(dllexport) HANDLE CreateThread(void* lpThreadAttributes,
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||
size_t dwStackSize,
|
||
void* lpStartAddress,
|
||
void* lpParameter,
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||
DWORD dwCreationFlags,
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DWORD* lpThreadId) {
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(void)lpThreadAttributes; (void)dwStackSize; (void)dwCreationFlags;
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||
uint32_t tid = 0;
|
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uint32_t s = SysCreateThread((uint64_t)(uintptr_t)lpStartAddress,
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(uint64_t)(uintptr_t)lpParameter,
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0 /* normal priority */, &tid);
|
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if (s != 0) { gLastError = 11; return INVALID_HANDLE_VALUE; }
|
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if (lpThreadId) *lpThreadId = (DWORD)tid;
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return KH_TO_HANDLE(tid);
|
||
}
|
||
|
||
// WaitForSingleObject – blocks on process handles via SysWaitForProcess;
|
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// thread and other handle types are not yet waitable so return immediately.
|
||
__declspec(dllexport) DWORD WaitForSingleObject(HANDLE hHandle, DWORD dwMilliseconds) {
|
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(void)dwMilliseconds;
|
||
uint32_t kh = HANDLE_TO_KH(hHandle);
|
||
if (kh) SysWaitForProcess(kh); // no-op KSTATUS if not a process handle
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||
return WAIT_OBJECT_0;
|
||
}
|
||
|
||
// ---------------------------------------------------------------------------
|
||
// Process creation
|
||
// ---------------------------------------------------------------------------
|
||
|
||
typedef struct {
|
||
HANDLE hProcess;
|
||
HANDLE hThread;
|
||
DWORD dwProcessId;
|
||
DWORD dwThreadId;
|
||
} PROCESS_INFORMATION;
|
||
|
||
#define STILL_ACTIVE 259UL
|
||
|
||
__declspec(dllexport) BOOL CreateProcessA(
|
||
const char* lpApplicationName,
|
||
char* lpCommandLine,
|
||
void* lpProcessAttributes,
|
||
void* lpThreadAttributes,
|
||
BOOL bInheritHandles,
|
||
DWORD dwCreationFlags,
|
||
void* lpEnvironment,
|
||
const char* lpCurrentDirectory,
|
||
STARTUPINFOA* lpStartupInfo,
|
||
PROCESS_INFORMATION* lpProcessInformation) {
|
||
(void)lpCommandLine; (void)lpProcessAttributes; (void)lpThreadAttributes;
|
||
(void)bInheritHandles; (void)dwCreationFlags; (void)lpEnvironment;
|
||
(void)lpCurrentDirectory; (void)lpStartupInfo;
|
||
|
||
if (!lpApplicationName || !lpProcessInformation) {
|
||
gLastError = 87; // ERROR_INVALID_PARAMETER
|
||
return FALSE;
|
||
}
|
||
|
||
uint32_t kh = 0;
|
||
uint32_t s = SysCreateProcess(lpApplicationName, &kh);
|
||
if (s != 0 || kh == 0) {
|
||
gLastError = 2; // ERROR_FILE_NOT_FOUND / generic launch failure
|
||
return FALSE;
|
||
}
|
||
|
||
lpProcessInformation->hProcess = KH_TO_HANDLE(kh);
|
||
lpProcessInformation->hThread = INVALID_HANDLE_VALUE;
|
||
lpProcessInformation->dwProcessId = 0;
|
||
lpProcessInformation->dwThreadId = 0;
|
||
return TRUE;
|
||
}
|
||
|
||
__declspec(dllexport) BOOL GetExitCodeProcess(HANDLE hProcess, DWORD* lpExitCode) {
|
||
if (!lpExitCode) { gLastError = 87; return FALSE; }
|
||
uint32_t kh = HANDLE_TO_KH(hProcess);
|
||
if (!kh) { gLastError = 6; return FALSE; } // ERROR_INVALID_HANDLE
|
||
int code = 0;
|
||
uint32_t s = SysGetProcessExitCode(kh, &code);
|
||
if (s != 0) { gLastError = 6; return FALSE; }
|
||
*lpExitCode = (DWORD)code;
|
||
return TRUE;
|
||
}
|
||
|
||
__declspec(dllexport) DWORD ResumeThread(HANDLE hThread) {
|
||
(void)hThread;
|
||
return 0; // previous suspend count
|
||
}
|
||
|
||
#define THREAD_PRIORITY_NORMAL 0
|
||
|
||
__declspec(dllexport) BOOL SetThreadPriority(HANDLE hThread, int nPriority) {
|
||
(void)hThread; (void)nPriority;
|
||
return TRUE;
|
||
}
|
||
|
||
__declspec(dllexport) int GetThreadPriority(HANDLE hThread) {
|
||
(void)hThread;
|
||
return THREAD_PRIORITY_NORMAL;
|
||
}
|
||
|
||
__declspec(dllexport) uintptr_t SetThreadAffinityMask(HANDLE hThread,
|
||
uintptr_t dwThreadAffinityMask) {
|
||
(void)hThread; (void)dwThreadAffinityMask;
|
||
return 1; // previous mask: CPU 0 only
|
||
}
|
||
|
||
__declspec(dllexport) void Sleep(DWORD dwMilliseconds) {
|
||
SysSleep(dwMilliseconds);
|
||
}
|
||
|
||
// ---------------------------------------------------------------------------
|
||
// Console I/O
|
||
// ---------------------------------------------------------------------------
|
||
|
||
#define STD_INPUT_HANDLE ((DWORD)-10)
|
||
#define STD_OUTPUT_HANDLE ((DWORD)-11)
|
||
#define STD_ERROR_HANDLE ((DWORD)-12)
|
||
|
||
// We have no real console handles; return a sentinel the other APIs recognise.
|
||
__declspec(dllexport) HANDLE GetStdHandle(DWORD nStdHandle) {
|
||
return (HANDLE)(uintptr_t)nStdHandle;
|
||
}
|
||
|
||
// ReadConsoleA: blocking read of up to nNumberOfCharsToRead characters.
|
||
// Each character is read individually via SysKbReadChar so the caller can
|
||
// do its own line-editing (echo, backspace, etc.) one char at a time.
|
||
__declspec(dllexport) BOOL ReadConsoleA(HANDLE hConsoleInput,
|
||
void* lpBuffer,
|
||
DWORD nNumberOfCharsToRead,
|
||
DWORD* lpNumberOfCharsRead,
|
||
void* pInputControl) {
|
||
(void)hConsoleInput; (void)pInputControl;
|
||
if (!lpBuffer || nNumberOfCharsToRead == 0) return FALSE;
|
||
|
||
char* buf = (char*)lpBuffer;
|
||
DWORD i = 0; // Notice we switched to a while loop
|
||
|
||
while (i < nNumberOfCharsToRead) {
|
||
char c = SysKbReadChar();
|
||
|
||
// Ignore unmapped keys (Shift, Ctrl, etc.)
|
||
if (c == 0) continue;
|
||
|
||
// Deliver the raw character; the caller handles echo and line editing.
|
||
buf[i] = c;
|
||
i++;
|
||
|
||
// Stop reading when the user presses Enter
|
||
if (c == '\n' || c == '\r') {
|
||
// If your shell expects strings to be \n terminated, leave this.
|
||
// If your shell expects \0 termination without a newline,
|
||
// you might want to replace buf[i-1] with \0 here!
|
||
break;
|
||
}
|
||
}
|
||
|
||
if (lpNumberOfCharsRead) *lpNumberOfCharsRead = i;
|
||
return TRUE;
|
||
}
|
||
|
||
// ---------------------------------------------------------------------------
|
||
|
||
__declspec(dllexport) HANDLE CreateMutexA(void* lpMutexAttributes, BOOL bInitialOwner,
|
||
const char* lpName) {
|
||
(void)lpMutexAttributes; (void)bInitialOwner; (void)lpName;
|
||
return (HANDLE)(uintptr_t)0x4D555458UL; // 'MUTX' sentinel
|
||
}
|
||
|
||
__declspec(dllexport) BOOL ReleaseMutex(HANDLE hMutex) {
|
||
(void)hMutex;
|
||
return TRUE;
|
||
}
|
||
|
||
__declspec(dllexport) HANDLE CreateSemaphoreA(void* lpSemaphoreAttributes,
|
||
long lInitialCount, long lMaximumCount,
|
||
const char* lpName) {
|
||
(void)lpSemaphoreAttributes; (void)lInitialCount;
|
||
(void)lMaximumCount; (void)lpName;
|
||
return (HANDLE)(uintptr_t)0x53454D41UL; // 'SEMA' sentinel
|
||
}
|
||
|
||
__declspec(dllexport) BOOL ReleaseSemaphore(HANDLE hSemaphore, long lReleaseCount,
|
||
long* lpPreviousCount) {
|
||
(void)hSemaphore; (void)lReleaseCount;
|
||
if (lpPreviousCount) *lpPreviousCount = 0;
|
||
return TRUE;
|
||
}
|
||
|
||
// ---------------------------------------------------------------------------
|
||
// Critical Sections & Condition Variables
|
||
// Single-threaded: all locks are no-ops.
|
||
// ---------------------------------------------------------------------------
|
||
|
||
// Minimal opaque types; callers allocate these from their Windows headers –
|
||
// we just need the pointer to be accepted by our stubs.
|
||
typedef struct { uintptr_t _opaque[5]; } CRITICAL_SECTION;
|
||
typedef struct { void* _ptr; } CONDITION_VARIABLE;
|
||
|
||
__declspec(dllexport) void InitializeCriticalSection(CRITICAL_SECTION* lpCS) {
|
||
(void)lpCS;
|
||
}
|
||
__declspec(dllexport) BOOL InitializeCriticalSectionAndSpinCount(CRITICAL_SECTION* lpCS,
|
||
DWORD dwSpinCount) {
|
||
(void)lpCS; (void)dwSpinCount;
|
||
return TRUE;
|
||
}
|
||
__declspec(dllexport) void DeleteCriticalSection(CRITICAL_SECTION* lpCS) { (void)lpCS; }
|
||
__declspec(dllexport) void EnterCriticalSection(CRITICAL_SECTION* lpCS) { (void)lpCS; }
|
||
__declspec(dllexport) void LeaveCriticalSection(CRITICAL_SECTION* lpCS) { (void)lpCS; }
|
||
__declspec(dllexport) BOOL TryEnterCriticalSection(CRITICAL_SECTION* lpCS) {
|
||
(void)lpCS; return TRUE;
|
||
}
|
||
|
||
__declspec(dllexport) void InitializeConditionVariable(CONDITION_VARIABLE* cv) { (void)cv; }
|
||
|
||
__declspec(dllexport) BOOL SleepConditionVariableCS(CONDITION_VARIABLE* cv,
|
||
CRITICAL_SECTION* cs,
|
||
DWORD dwMilliseconds) {
|
||
(void)cv; (void)cs; (void)dwMilliseconds;
|
||
return TRUE;
|
||
}
|
||
__declspec(dllexport) void WakeConditionVariable(CONDITION_VARIABLE* cv) { (void)cv; }
|
||
__declspec(dllexport) void WakeAllConditionVariable(CONDITION_VARIABLE* cv) { (void)cv; }
|
||
|
||
// ---------------------------------------------------------------------------
|
||
// Timing & Performance Counters
|
||
// We report a 1 MHz counter so QPC / QPF is consistent with GetTickCount.
|
||
// ---------------------------------------------------------------------------
|
||
|
||
typedef union {
|
||
struct { DWORD LowPart; long HighPart; } u;
|
||
long long QuadPart;
|
||
} LARGE_INTEGER;
|
||
|
||
#define QPC_FREQUENCY 1000000LL // 1 MHz
|
||
|
||
__declspec(dllexport) BOOL QueryPerformanceFrequency(LARGE_INTEGER* lpFrequency) {
|
||
if (lpFrequency) lpFrequency->QuadPart = QPC_FREQUENCY;
|
||
return TRUE;
|
||
}
|
||
|
||
__declspec(dllexport) BOOL QueryPerformanceCounter(LARGE_INTEGER* lpPerformanceCount) {
|
||
// SysGetTick returns milliseconds; scale to microseconds for 1 MHz QPC.
|
||
if (lpPerformanceCount)
|
||
lpPerformanceCount->QuadPart = (long long)SysGetTick() * 1000LL;
|
||
return TRUE;
|
||
}
|
||
|
||
__declspec(dllexport) void GetSystemTimeAsFileTime(void* lpSystemTimeAsFileTime) {
|
||
// Return a fixed FILETIME representing 2024-01-01 00:00:00 UTC.
|
||
// FILETIME = 100-nanosecond intervals since 1601-01-01.
|
||
// 2024-01-01 offset from 1601 in 100ns units: 133186080000000000
|
||
if (!lpSystemTimeAsFileTime) return;
|
||
unsigned long long ft = 133186080000000000ULL
|
||
+ (unsigned long long)SysGetTick() * 10000ULL;
|
||
unsigned char* p = (unsigned char*)lpSystemTimeAsFileTime;
|
||
for (int i = 0; i < 8; i++) p[i] = (unsigned char)(ft >> (i * 8));
|
||
}
|
||
|
||
// ---------------------------------------------------------------------------
|
||
// System Information
|
||
// ---------------------------------------------------------------------------
|
||
|
||
typedef struct {
|
||
union {
|
||
DWORD dwOemId;
|
||
struct { unsigned short wProcessorArchitecture;
|
||
unsigned short wReserved; };
|
||
};
|
||
DWORD dwPageSize;
|
||
void* lpMinimumApplicationAddress;
|
||
void* lpMaximumApplicationAddress;
|
||
uintptr_t dwActiveProcessorMask;
|
||
DWORD dwNumberOfProcessors;
|
||
DWORD dwProcessorType;
|
||
DWORD dwAllocationGranularity;
|
||
unsigned short wProcessorLevel;
|
||
unsigned short wProcessorRevision;
|
||
} SYSTEM_INFO;
|
||
|
||
__declspec(dllexport) void GetSystemInfo(SYSTEM_INFO* lpSystemInfo) {
|
||
if (!lpSystemInfo) return;
|
||
unsigned char* p = (unsigned char*)lpSystemInfo;
|
||
for (size_t i = 0; i < sizeof(*lpSystemInfo); i++) p[i] = 0;
|
||
lpSystemInfo->wProcessorArchitecture = 9; // PROCESSOR_ARCHITECTURE_AMD64
|
||
lpSystemInfo->dwPageSize = 4096;
|
||
lpSystemInfo->lpMinimumApplicationAddress = (void*)0x10000;
|
||
lpSystemInfo->lpMaximumApplicationAddress = (void*)0x7FFFFFFEFFFFull;
|
||
lpSystemInfo->dwActiveProcessorMask = 1;
|
||
lpSystemInfo->dwNumberOfProcessors = 1;
|
||
lpSystemInfo->dwProcessorType = 8664; // PROCESSOR_AMD_X8664
|
||
lpSystemInfo->dwAllocationGranularity= 65536;
|
||
lpSystemInfo->wProcessorLevel = 6;
|
||
lpSystemInfo->wProcessorRevision = 0;
|
||
}
|
||
|
||
typedef struct {
|
||
DWORD dwLength;
|
||
DWORD dwMemoryLoad;
|
||
unsigned long long ullTotalPhys;
|
||
unsigned long long ullAvailPhys;
|
||
unsigned long long ullTotalPageFile;
|
||
unsigned long long ullAvailPageFile;
|
||
unsigned long long ullTotalVirtual;
|
||
unsigned long long ullAvailVirtual;
|
||
unsigned long long ullAvailExtendedVirtual;
|
||
} MEMORYSTATUSEX;
|
||
|
||
__declspec(dllexport) BOOL GetLogicalProcessorInformation(void* Buffer,
|
||
DWORD* ReturnedLength) {
|
||
(void)Buffer;
|
||
// Signal that the buffer is too small so callers know to handle failure.
|
||
if (ReturnedLength) *ReturnedLength = 0;
|
||
gLastError = 122; // ERROR_INSUFFICIENT_BUFFER
|
||
return FALSE;
|
||
}
|
||
|
||
#define MAX_PATH 260
|
||
|
||
__declspec(dllexport) unsigned int GetSystemDirectoryA(char* lpBuffer, unsigned int uSize) {
|
||
static const char sysdir[] = "C:\\Windows\\System32";
|
||
unsigned int needed = sizeof(sysdir); // includes NUL
|
||
if (lpBuffer && uSize >= needed) {
|
||
for (unsigned int i = 0; i < needed; i++) lpBuffer[i] = sysdir[i];
|
||
}
|
||
return needed - 1; // return length without NUL, matching Win32
|
||
}
|
||
|
||
__declspec(dllexport) unsigned int GetWindowsDirectoryA(char* lpBuffer, unsigned int uSize) {
|
||
static const char windir[] = "C:\\Windows";
|
||
unsigned int needed = sizeof(windir);
|
||
if (lpBuffer && uSize >= needed) {
|
||
for (unsigned int i = 0; i < needed; i++) lpBuffer[i] = windir[i];
|
||
}
|
||
return needed - 1;
|
||
}
|
||
|
||
__declspec(dllexport) DWORD GetEnvironmentVariableA(const char* lpName, char* lpBuffer,
|
||
DWORD nSize) {
|
||
(void)lpName; (void)lpBuffer; (void)nSize;
|
||
gLastError = 203; // ERROR_ENVVAR_NOT_FOUND
|
||
return 0;
|
||
}
|
||
|
||
__declspec(dllexport) char* GetEnvironmentStrings(void) {
|
||
// Return a double-NUL-terminated empty environment block.
|
||
static char emptyEnv[2] = { '\0', '\0' };
|
||
return emptyEnv;
|
||
}
|
||
|
||
__declspec(dllexport) BOOL FreeEnvironmentStringsA(char* penv) {
|
||
(void)penv; return TRUE;
|
||
}
|
||
|
||
__declspec(dllexport) unsigned short* GetEnvironmentStringsW(void) {
|
||
static unsigned short emptyEnvW[2] = { 0, 0 };
|
||
return emptyEnvW;
|
||
}
|
||
|
||
__declspec(dllexport) BOOL FreeEnvironmentStringsW(unsigned short* penv) {
|
||
(void)penv; return TRUE;
|
||
}
|
||
|
||
// ---------------------------------------------------------------------------
|
||
// Handle / Error helpers
|
||
// ---------------------------------------------------------------------------
|
||
|
||
__declspec(dllexport) unsigned int SetErrorMode(unsigned int uMode) {
|
||
(void)uMode;
|
||
return 0; // previous mode
|
||
}
|
||
|
||
__declspec(dllexport) unsigned int SetHandleCount(unsigned int uNumber) {
|
||
return uNumber < 256 ? 256 : uNumber;
|
||
}
|
||
|
||
// ---------------------------------------------------------------------------
|
||
// File helpers
|
||
// ---------------------------------------------------------------------------
|
||
|
||
#define FILE_TYPE_UNKNOWN 0x0000
|
||
#define FILE_TYPE_DISK 0x0001
|
||
#define FILE_TYPE_CHAR 0x0002
|
||
#define FILE_TYPE_PIPE 0x0003
|
||
|
||
#define STD_INPUT_HANDLE ((DWORD)-10)
|
||
#define STD_OUTPUT_HANDLE ((DWORD)-11)
|
||
#define STD_ERROR_HANDLE ((DWORD)-12)
|
||
|
||
__declspec(dllexport) DWORD GetFileType(HANDLE hFile) {
|
||
if (!hFile || hFile == INVALID_HANDLE_VALUE) return FILE_TYPE_UNKNOWN;
|
||
return FILE_TYPE_DISK;
|
||
}
|
||
|
||
// ---------------------------------------------------------------------------
|
||
// Exception Handling & Debugging
|
||
// ---------------------------------------------------------------------------
|
||
|
||
#define EXCEPTION_CONTINUE_SEARCH 0
|
||
#define EXCEPTION_EXECUTE_HANDLER 1
|
||
|
||
__declspec(dllexport) void* AddVectoredExceptionHandler(unsigned long First, void* Handler) {
|
||
(void)First; (void)Handler;
|
||
// Return a non-NULL sentinel so callers can pass it to RemoveVectoredExceptionHandler.
|
||
return (void*)(uintptr_t)0x56455843UL; // 'VEXC'
|
||
}
|
||
|
||
__declspec(dllexport) unsigned long RemoveVectoredExceptionHandler(void* Handle) {
|
||
(void)Handle;
|
||
return 1; // success
|
||
}
|
||
|
||
__declspec(dllexport) void RaiseException(DWORD dwExceptionCode, DWORD dwExceptionFlags,
|
||
DWORD nNumberOfArguments,
|
||
const uintptr_t* lpArguments) {
|
||
(void)dwExceptionCode; (void)dwExceptionFlags;
|
||
(void)nNumberOfArguments; (void)lpArguments;
|
||
// Best-effort: nothing to unwind; just halt.
|
||
while (true) ;
|
||
}
|
||
|
||
typedef struct _EXCEPTION_POINTERS { void* ExceptionRecord; void* ContextRecord; } EXCEPTION_POINTERS;
|
||
|
||
__declspec(dllexport) long UnhandledExceptionFilter(EXCEPTION_POINTERS* ExceptionInfo) {
|
||
(void)ExceptionInfo;
|
||
return EXCEPTION_CONTINUE_SEARCH;
|
||
}
|
||
|
||
typedef long (*LPTOP_LEVEL_EXCEPTION_FILTER)(EXCEPTION_POINTERS*);
|
||
|
||
__declspec(dllexport) LPTOP_LEVEL_EXCEPTION_FILTER
|
||
SetUnhandledExceptionFilter(LPTOP_LEVEL_EXCEPTION_FILTER lpFilter) {
|
||
(void)lpFilter;
|
||
return NULL; // previous filter: none
|
||
}
|
||
|
||
__declspec(dllexport) BOOL IsDebuggerPresent(void) {
|
||
return FALSE;
|
||
}
|
||
|
||
// ---------------------------------------------------------------------------
|
||
// RTL Exception / Unwind (SEH infrastructure – all stubs)
|
||
// ---------------------------------------------------------------------------
|
||
|
||
typedef struct _RUNTIME_FUNCTION {
|
||
unsigned int BeginAddress;
|
||
unsigned int EndAddress;
|
||
unsigned int UnwindInfoAddress;
|
||
} RUNTIME_FUNCTION;
|
||
|
||
// We have no runtime function table, so RtlLookupFunctionEntry always fails.
|
||
__declspec(dllexport) RUNTIME_FUNCTION*
|
||
RtlLookupFunctionEntry(unsigned long long ControlPc,
|
||
unsigned long long* ImageBase,
|
||
void* HistoryTable) {
|
||
(void)ControlPc; (void)HistoryTable;
|
||
if (ImageBase) *ImageBase = 0;
|
||
return NULL;
|
||
}
|
||
|
||
__declspec(dllexport) void* RtlVirtualUnwind(unsigned long HandlerType,
|
||
unsigned long long ImageBase,
|
||
unsigned long long ControlPc,
|
||
RUNTIME_FUNCTION* FunctionEntry,
|
||
void* ContextRecord,
|
||
void** HandlerData,
|
||
unsigned long long* EstablisherFrame,
|
||
void* ContextPointers) {
|
||
(void)HandlerType; (void)ImageBase; (void)ControlPc; (void)FunctionEntry;
|
||
(void)ContextRecord; (void)ContextPointers;
|
||
if (HandlerData) *HandlerData = NULL;
|
||
if (EstablisherFrame)*EstablisherFrame = 0;
|
||
return NULL;
|
||
}
|
||
|
||
__declspec(dllexport) void RtlCaptureContext(void* ContextRecord) {
|
||
// Zero out the context record so callers don't read garbage.
|
||
if (!ContextRecord) return;
|
||
// CONTEXT is ~1232 bytes on x64; zero a conservative upper bound.
|
||
unsigned char* p = (unsigned char*)ContextRecord;
|
||
for (int i = 0; i < 1232; i++) p[i] = 0;
|
||
}
|
||
|
||
__declspec(dllexport) void RtlUnwindEx(void* TargetFrame, void* TargetIp,
|
||
void* ExceptionRecord, void* ReturnValue,
|
||
void* ContextRecord, void* HistoryTable) {
|
||
(void)TargetFrame; (void)TargetIp; (void)ExceptionRecord;
|
||
(void)ReturnValue; (void)ContextRecord; (void)HistoryTable;
|
||
// No real unwind possible; halt rather than corrupt the stack silently.
|
||
while (true) ;
|
||
}
|
||
|
||
// ---------------------------------------------------------------------------
|
||
// Code Pages & Locale helpers
|
||
// ---------------------------------------------------------------------------
|
||
|
||
typedef struct { unsigned int MaxCharSize; unsigned char DefaultChar[2]; unsigned char LeadByte[12]; } CPINFO;
|
||
|
||
__declspec(dllexport) BOOL GetCPInfo(unsigned int CodePage, CPINFO* lpCPInfo) {
|
||
(void)CodePage;
|
||
if (lpCPInfo) {
|
||
lpCPInfo->MaxCharSize = 1;
|
||
lpCPInfo->DefaultChar[0] = '?';
|
||
lpCPInfo->DefaultChar[1] = 0;
|
||
for (int i = 0; i < 12; i++) lpCPInfo->LeadByte[i] = 0;
|
||
}
|
||
return TRUE;
|
||
}
|
||
|
||
__declspec(dllexport) BOOL IsValidCodePage(unsigned int CodePage) {
|
||
// Acknowledge the two code pages we claim to support.
|
||
return (CodePage == 1252 || CodePage == 437) ? TRUE : FALSE;
|
||
}
|
||
|
||
__declspec(dllexport) int LCMapStringA(unsigned int Locale, DWORD dwMapFlags,
|
||
const char* lpSrcStr, int cchSrc,
|
||
char* lpDestStr, int cchDest) {
|
||
(void)Locale; (void)dwMapFlags; (void)lpSrcStr; (void)cchSrc;
|
||
(void)lpDestStr; (void)cchDest;
|
||
return 0;
|
||
}
|
||
|
||
__declspec(dllexport) int LCMapStringW(unsigned int Locale, DWORD dwMapFlags,
|
||
const unsigned short* lpSrcStr, int cchSrc,
|
||
unsigned short* lpDestStr, int cchDest) {
|
||
(void)Locale; (void)dwMapFlags; (void)lpSrcStr; (void)cchSrc;
|
||
(void)lpDestStr; (void)cchDest;
|
||
return 0;
|
||
}
|
||
|
||
__declspec(dllexport) BOOL GetStringTypeA(unsigned int Locale, DWORD dwInfoType,
|
||
const char* lpSrcStr, int cchSrc,
|
||
unsigned short* lpCharType) {
|
||
(void)Locale; (void)dwInfoType; (void)lpSrcStr; (void)cchSrc; (void)lpCharType;
|
||
return FALSE;
|
||
}
|
||
|
||
__declspec(dllexport) BOOL GetStringTypeW(DWORD dwInfoType,
|
||
const unsigned short* lpSrcStr, int cchSrc,
|
||
unsigned short* lpCharType) {
|
||
(void)dwInfoType; (void)lpSrcStr; (void)cchSrc; (void)lpCharType;
|
||
return FALSE;
|
||
}
|
||
|
||
__declspec(dllexport) int GetLocaleInfoA(unsigned int Locale, DWORD LCType,
|
||
char* lpLCData, int cchData) {
|
||
(void)Locale; (void)LCType; (void)lpLCData; (void)cchData;
|
||
return 0;
|
||
}
|
||
|
||
// ---------------------------------------------------------------------------
|
||
// Fiber Local Storage (FLS)
|
||
// We implement a minimal 64-slot static table so callers that use FLS for
|
||
// thread-local-ish state don't immediately fail.
|
||
// ---------------------------------------------------------------------------
|
||
|
||
#define FLS_MAX_SLOTS 64
|
||
#define FLS_OUT_OF_INDEXES 0xFFFFFFFFUL
|
||
|
||
static void* gFlsSlots[FLS_MAX_SLOTS];
|
||
static int gFlsUsed[FLS_MAX_SLOTS]; // 0 = free, 1 = allocated
|
||
|
||
__declspec(dllexport) DWORD FlsAlloc(void* lpCallback) {
|
||
(void)lpCallback;
|
||
for (int i = 0; i < FLS_MAX_SLOTS; i++) {
|
||
if (!gFlsUsed[i]) {
|
||
gFlsUsed[i] = 1;
|
||
gFlsSlots[i] = NULL;
|
||
return (DWORD)i;
|
||
}
|
||
}
|
||
gLastError = 8; // ERROR_NOT_ENOUGH_MEMORY
|
||
return (DWORD)FLS_OUT_OF_INDEXES;
|
||
}
|
||
|
||
__declspec(dllexport) void* FlsGetValue(DWORD dwFlsIndex) {
|
||
if (dwFlsIndex >= FLS_MAX_SLOTS || !gFlsUsed[dwFlsIndex]) {
|
||
gLastError = 87; // ERROR_INVALID_PARAMETER
|
||
return NULL;
|
||
}
|
||
return gFlsSlots[dwFlsIndex];
|
||
}
|
||
|
||
__declspec(dllexport) BOOL FlsSetValue(DWORD dwFlsIndex, void* lpFlsData) {
|
||
if (dwFlsIndex >= FLS_MAX_SLOTS || !gFlsUsed[dwFlsIndex]) {
|
||
gLastError = 87;
|
||
return FALSE;
|
||
}
|
||
gFlsSlots[dwFlsIndex] = lpFlsData;
|
||
return TRUE;
|
||
}
|
||
|
||
__declspec(dllexport) BOOL FlsFree(DWORD dwFlsIndex) {
|
||
if (dwFlsIndex >= FLS_MAX_SLOTS || !gFlsUsed[dwFlsIndex]) {
|
||
gLastError = 87;
|
||
return FALSE;
|
||
}
|
||
gFlsUsed[dwFlsIndex] = 0;
|
||
gFlsSlots[dwFlsIndex] = NULL;
|
||
return TRUE;
|
||
}
|
||
|
||
// ---------------------------------------------------------------------------
|
||
// Pointer encoding (security cookie obfuscation)
|
||
// We have no security cookie; return the pointer unchanged.
|
||
// ---------------------------------------------------------------------------
|
||
|
||
__declspec(dllexport) void* EncodePointer(void* Ptr) { return Ptr; }
|
||
__declspec(dllexport) void* DecodePointer(void* Ptr) { return Ptr; }
|