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A few more kernel32 stubs for MSVC versions

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This commit is contained in:
Luke Street
2025-10-01 15:20:55 -06:00
parent ccd79a256a
commit aee35ee0da
4 changed files with 620 additions and 89 deletions
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57
dll/user32.cpp
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@@ -5,7 +5,7 @@ namespace user32 {
constexpr uint32_t RT_STRING_ID = 6;
int WIN_FUNC LoadStringA(void* hInstance, unsigned int uID, char* lpBuffer, int cchBufferMax) {
DEBUG_LOG("LoadStringA %p %u %d\n", hInstance, uID, cchBufferMax);
DEBUG_LOG("LoadStringA(%p, %u, %p, %d)\n", hInstance, uID, lpBuffer, cchBufferMax);
if (!lpBuffer || cchBufferMax <= 0) {
return 0;
}
@@ -51,6 +51,59 @@ namespace user32 {
return copyLength;
}
int WIN_FUNC LoadStringW(void* hInstance, unsigned int uID, uint16_t* lpBuffer, int cchBufferMax) {
DEBUG_LOG("LoadStringW(%p, %u, %p, %d)\n", hInstance, uID, lpBuffer, cchBufferMax);
wibo::Executable *mod = wibo::executableFromModule((HMODULE) hInstance);
if (!mod) {
return 0;
}
wibo::ResourceIdentifier type = wibo::ResourceIdentifier::fromID(RT_STRING_ID);
wibo::ResourceIdentifier table = wibo::ResourceIdentifier::fromID((uID >> 4) + 1);
wibo::ResourceLocation loc;
if (!mod->findResource(type, table, std::nullopt, loc)) {
return 0;
}
const uint16_t *cursor = reinterpret_cast<const uint16_t *>(loc.data);
const uint16_t *end = cursor + (loc.size / sizeof(uint16_t));
unsigned int entryIndex = uID & 0x0Fu;
for (unsigned int i = 0; i < entryIndex; ++i) {
if (cursor >= end) {
return 0;
}
uint16_t length = *cursor++;
if (cursor + length > end) {
return 0;
}
cursor += length;
}
if (cursor >= end) {
return 0;
}
uint16_t length = *cursor++;
if (cursor + length > end) {
return 0;
}
if (cchBufferMax == 0) {
if (lpBuffer) {
*reinterpret_cast<uint16_t **>(lpBuffer) = const_cast<uint16_t *>(cursor);
}
return length;
}
if (!lpBuffer || cchBufferMax <= 0) {
return 0;
}
int copyLength = length;
if (copyLength > cchBufferMax - 1) {
copyLength = cchBufferMax - 1;
}
for (int i = 0; i < copyLength; ++i) {
lpBuffer[i] = cursor[i];
}
lpBuffer[copyLength] = 0;
DEBUG_LOG("LoadStringW -> length %d\n", copyLength);
return copyLength;
}
int WIN_FUNC MessageBoxA(void *hwnd, const char *lpText, const char *lpCaption, unsigned int uType) {
printf("MESSAGE BOX: [%s] %s\n", lpCaption, lpText);
fflush(stdout);
@@ -58,8 +111,10 @@ namespace user32 {
}
}
static void *resolveByName(const char *name) {
if (strcmp(name, "LoadStringA") == 0) return (void *) user32::LoadStringA;
if (strcmp(name, "LoadStringW") == 0) return (void *) user32::LoadStringW;
if (strcmp(name, "MessageBoxA") == 0) return (void *) user32::MessageBoxA;
return nullptr;
}