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Store program ID and expose it in Lua (#414)

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wheremyfoodat 2024-02-22 14:26:31 +00:00 • committed by GitHub
parent 7b580ac80e
commit 6279ed699a
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8 changed files with 66 additions and 22 deletions
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61
src/lua.cpp
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@ -1,4 +1,5 @@
#ifdef PANDA3DS_ENABLE_LUA
#include "emulator.hpp"
#include "lua_manager.hpp"
#ifndef __ANDROID__
@ -42,7 +43,7 @@ void LuaManager::loadFile(const char* path) {
if (!initialized) {
initialize();
}
// If init failed, don't execute
if (!initialized) {
printf("Lua initialization failed, file won't run\n");
@ -88,8 +89,8 @@ void LuaManager::loadString(const std::string& code) {
}
void LuaManager::signalEventInternal(LuaEvent e) {
lua_getglobal(L, "eventHandler"); // We want to call the event handler
lua_pushnumber(L, static_cast<int>(e)); // Push event type
lua_getglobal(L, "eventHandler"); // We want to call the event handler
lua_pushnumber(L, static_cast<int>(e)); // Push event type
// Call the function with 1 argument and 0 outputs, without an error handler
lua_pcall(L, 1, 0, 0);
@ -103,28 +104,46 @@ void LuaManager::reset() {
// Initialize C++ thunks for Lua code to call here
// All code beyond this point is terrible and full of global state, don't judge
Memory* LuaManager::g_memory = nullptr;
Emulator* LuaManager::g_emulator = nullptr;
#define MAKE_MEMORY_FUNCTIONS(size) \
static int read##size##Thunk(lua_State* L) { \
const u32 vaddr = (u32)lua_tonumber(L, 1); \
lua_pushnumber(L, LuaManager::g_memory->read##size(vaddr)); \
return 1; \
} \
static int write##size##Thunk(lua_State* L) { \
const u32 vaddr = (u32)lua_tonumber(L, 1); \
const u##size value = (u##size)lua_tonumber(L, 2); \
LuaManager::g_memory->write##size(vaddr, value); \
return 0; \
#define MAKE_MEMORY_FUNCTIONS(size) \
static int read##size##Thunk(lua_State* L) { \
const u32 vaddr = (u32)lua_tonumber(L, 1); \
lua_pushnumber(L, LuaManager::g_emulator->getMemory().read##size(vaddr)); \
return 1; \
} \
static int write##size##Thunk(lua_State* L) { \
const u32 vaddr = (u32)lua_tonumber(L, 1); \
const u##size value = (u##size)lua_tonumber(L, 2); \
LuaManager::g_emulator->getMemory().write##size(vaddr, value); \
return 0; \
}
MAKE_MEMORY_FUNCTIONS(8)
MAKE_MEMORY_FUNCTIONS(16)
MAKE_MEMORY_FUNCTIONS(32)
MAKE_MEMORY_FUNCTIONS(64)
#undef MAKE_MEMORY_FUNCTIONS
static int getAppIDThunk(lua_State* L) {
std::optional<u64> id = LuaManager::g_emulator->getMemory().getProgramID();
// If the app has an ID, return true + its ID
// Otherwise return false and 0 as the ID
if (id.has_value()) {
lua_pushboolean(L, 1); // Return true
lua_pushnumber(L, u32(*id)); // Return bottom 32 bits
lua_pushnumber(L, u32(*id >> 32)); // Return top 32 bits
} else {
lua_pushboolean(L, 0); // Return false
// Return no ID
lua_pushnumber(L, 0);
lua_pushnumber(L, 0);
}
return 3;
}
// clang-format off
static constexpr luaL_Reg functions[] = {
{ "__read8", read8Thunk },
@ -135,6 +154,7 @@ static constexpr luaL_Reg functions[] = {
{ "__write16", write16Thunk },
{ "__write32", write32Thunk },
{ "__write64", write64Thunk },
{ "__getAppID", getAppIDThunk },
{ nullptr, nullptr },
};
// clang-format on
@ -150,6 +170,15 @@ void LuaManager::initializeThunks() {
write16 = function(addr, value) GLOBALS.__write16(addr, value) end,
write32 = function(addr, value) GLOBALS.__write32(addr, value) end,
write64 = function(addr, value) GLOBALS.__write64(addr, value) end,
getAppID = function()
local ffi = require("ffi")
result, low, high = GLOBALS.__getAppID()
id = bit.bor(ffi.cast("uint64_t", low), (bit.lshift(ffi.cast("uint64_t", high), 32)))
return result, id
end,
Frame = __Frame,
}
)";