WiiUPluginLoaderBackend/source/patcher/hooks_patcher_static.cpp

#include "hooks_patcher_static.h"
#include <coreinit/core.h>
#include <coreinit/messagequeue.h>
#include <padscore/wpad.h>
#include <vpad/input.h>

#include "../globals.h"
#include "../hooks.h"
#include "../utils/ConfigUtils.h"

uint8_t vpadPressCooldown  = 0xFF;
bool configMenuOpened      = false;
bool wantsToOpenConfigMenu = false;

DECL_FUNCTION(void, GX2SwapScanBuffers, void) {
    real_GX2SwapScanBuffers();

    if (wantsToOpenConfigMenu && !configMenuOpened) {
        configMenuOpened = true;
        ConfigUtils::openConfigMenu();
        configMenuOpened      = false;
        wantsToOpenConfigMenu = false;
    }
}

DECL_FUNCTION(void, GX2SetTVBuffer, void *buffer, uint32_t buffer_size, int32_t tv_render_mode, GX2SurfaceFormat format, GX2BufferingMode buffering_mode) {
    storedTVBuffer.buffer         = buffer;
    storedTVBuffer.buffer_size    = buffer_size;
    storedTVBuffer.mode           = tv_render_mode;
    storedTVBuffer.surface_format = format;
    storedTVBuffer.buffering_mode = buffering_mode;

    return real_GX2SetTVBuffer(buffer, buffer_size, tv_render_mode, format, buffering_mode);
}

DECL_FUNCTION(void, GX2SetDRCBuffer, void *buffer, uint32_t buffer_size, uint32_t drc_mode, GX2SurfaceFormat surface_format, GX2BufferingMode buffering_mode) {
    storedDRCBuffer.buffer         = buffer;
    storedDRCBuffer.buffer_size    = buffer_size;
    storedDRCBuffer.mode           = drc_mode;
    storedDRCBuffer.surface_format = surface_format;
    storedDRCBuffer.buffering_mode = buffering_mode;

    return real_GX2SetDRCBuffer(buffer, buffer_size, drc_mode, surface_format, buffering_mode);
}

static uint32_t lastData0 = 0;

DECL_FUNCTION(uint32_t, OSReceiveMessage, OSMessageQueue *queue, OSMessage *message, uint32_t flags) {
    uint32_t res = real_OSReceiveMessage(queue, message, flags);
    if (queue == OSGetSystemMessageQueue()) {
        if (message != nullptr && res) {
            if (lastData0 != message->args[0]) {
                if (message->args[0] == 0xFACEF000) {
                    CallHook(gPluginInformation, WUPS_LOADER_HOOK_ACQUIRED_FOREGROUND);
                } else if (message->args[0] == 0xD1E0D1E0) {
                    // Implemented via WUMS Hook
                }
            }
            lastData0 = message->args[0];
        }
    }
    return res;
}

DECL_FUNCTION(void, OSReleaseForeground) {
    if (OSGetCoreId() == 1) {
        CallHook(gPluginInformation, WUPS_LOADER_HOOK_RELEASE_FOREGROUND);
    }
    real_OSReleaseForeground();
}

DECL_FUNCTION(int32_t, VPADRead, int32_t chan, VPADStatus *buffer, uint32_t buffer_size, int32_t *error) {
    int32_t result = real_VPADRead(chan, buffer, buffer_size, error);

    if (result > 0 && (buffer[0].hold == (VPAD_BUTTON_L | VPAD_BUTTON_DOWN | VPAD_BUTTON_MINUS)) && vpadPressCooldown == 0 && !configMenuOpened) {
        wantsToOpenConfigMenu = true;
        vpadPressCooldown     = 0x3C;
    }

    if (vpadPressCooldown > 0) {
        vpadPressCooldown--;
    }
    return result;
}

DECL_FUNCTION(void, WPADRead, WPADChan chan, WPADStatusProController *data) {
    real_WPADRead(chan, data);

    if (!configMenuOpened && data[0].err == 0) {
        if (data[0].extensionType == WPAD_EXT_CORE || data[0].extensionType == WPAD_EXT_NUNCHUK) {
            // button data is in the first 2 bytes for wiimotes
            if (((uint16_t *) data)[0] == (WPAD_BUTTON_B | WPAD_BUTTON_DOWN | WPAD_BUTTON_MINUS)) {
                wantsToOpenConfigMenu = true;
            }
        } else {
            // TODO does this work for classic controllers?
            if (data[0].buttons == (WPAD_CLASSIC_BUTTON_L | WPAD_CLASSIC_BUTTON_DOWN | WPAD_CLASSIC_BUTTON_MINUS)) {
                wantsToOpenConfigMenu = true;
            }
        }
    }
}

// clang-format off
#define KiReport ((void(*)(const char *, ...)) 0xfff0ad0c)
// clang-format on

#pragma GCC push_options
#pragma GCC optimize("O0")

DECL_FUNCTION(uint32_t, SC17_FindClosestSymbol,
              uint32_t addr,
              uint32_t *outDistance,
              char *symbolNameBuffer,
              uint32_t symbolNameBufferLength,
              char *moduleNameBuffer,
              uint32_t moduleNameBufferLength) {
    for (int32_t plugin_index = 0; plugin_index < gPluginInformation->number_used_plugins; plugin_index++) {
        plugin_information_single_t *plugin = &(gPluginInformation->plugin_data[plugin_index]);
        plugin_section_info_t *section      = nullptr;

        for (auto &sectionInfo : plugin->info.sectionInfos) {
            if (sectionInfo.addr == 0 && sectionInfo.size == 0) {
                break;
            }
            if (strncmp(sectionInfo.name, ".text", sizeof(sectionInfo.name)) == 0) {
                section = &sectionInfo;
                break;
            }
        }
        if (section == nullptr) {
            continue;
        }
        if (addr < section->addr || addr >= (section->addr + section->size)) {
            continue;
        }

        strncpy(moduleNameBuffer, plugin->meta.name, moduleNameBufferLength);
        if (plugin->info.function_symbol_data != nullptr && plugin->info.number_function_symbol_data > 1) {
            for (uint32_t i = 0; i < plugin->info.number_function_symbol_data - 1; i++) {
                auto symbolData     = &plugin->info.function_symbol_data[i];
                auto symbolDataNext = &plugin->info.function_symbol_data[i + 1];
                if (i == plugin->info.number_function_symbol_data - 2 || (addr >= (uint32_t) symbolData->address && addr < (uint32_t) symbolDataNext->address)) {
                    strncpy(symbolNameBuffer, symbolData->name, moduleNameBufferLength);
                    if (outDistance) {
                        *outDistance = addr - (uint32_t) symbolData->address;
                    }
                    return 0;
                }
            }
        }

        strncpy(symbolNameBuffer, ".text", symbolNameBufferLength);

        if (outDistance) {
            *outDistance = addr - (uint32_t) section->addr;
        }

        return 0;
    }

    return real_SC17_FindClosestSymbol(addr, outDistance, symbolNameBuffer, symbolNameBufferLength, moduleNameBuffer, moduleNameBufferLength);
}

DECL_FUNCTION(uint32_t, KiGetAppSymbolName, uint32_t addr, char *buffer, int32_t bufSize) {
    for (int32_t plugin_index = 0; plugin_index < gPluginInformation->number_used_plugins; plugin_index++) {
        plugin_information_single_t *plugin = &(gPluginInformation->plugin_data[plugin_index]);
        plugin_section_info_t *section      = nullptr;

        for (auto &sectionInfo : plugin->info.sectionInfos) {
            if (sectionInfo.addr == 0 && sectionInfo.size == 0) {
                break;
            }
            if (strncmp(sectionInfo.name, ".text", sizeof(sectionInfo.name)) == 0) {
                section = &sectionInfo;
                break;
            }
        }
        if (section == nullptr) {
            continue;
        }
        if (addr < section->addr || addr >= (section->addr + section->size)) {
            continue;
        }

        auto pluginNameLen        = strlen(plugin->meta.name);
        int32_t spaceLeftInBuffer = (int32_t) bufSize - (int32_t) pluginNameLen - 1;
        if (spaceLeftInBuffer < 0) {
            spaceLeftInBuffer = 0;
        }
        strncpy(buffer, plugin->meta.name, bufSize);

        if (plugin->info.function_symbol_data != nullptr && plugin->info.number_function_symbol_data > 1) {
            for (uint32_t i = 0; i < plugin->info.number_function_symbol_data - 1; i++) {
                auto symbolData     = &plugin->info.function_symbol_data[i];
                auto symbolDataNext = &plugin->info.function_symbol_data[i + 1];
                if (i == plugin->info.number_function_symbol_data - 2 || (addr >= (uint32_t) symbolData->address && addr < (uint32_t) symbolDataNext->address)) {
                    if (spaceLeftInBuffer > 2) {
                        buffer[pluginNameLen]     = '|';
                        buffer[pluginNameLen + 1] = '\0';
                        strncpy(buffer + pluginNameLen + 1, symbolData->name, spaceLeftInBuffer - 1);
                    }
                    return (uint32_t) symbolData->address;
                }
            }
        }
        return addr;
    }

    return real_KiGetAppSymbolName(addr, buffer, bufSize);
}

#pragma GCC pop_options

function_replacement_data_t method_hooks_hooks_static[] __attribute__((section(".data"))) = {
        REPLACE_FUNCTION(GX2SwapScanBuffers, LIBRARY_GX2, GX2SwapScanBuffers),
        REPLACE_FUNCTION(GX2SetTVBuffer, LIBRARY_GX2, GX2SetTVBuffer),
        REPLACE_FUNCTION(GX2SetDRCBuffer, LIBRARY_GX2, GX2SetDRCBuffer),
        REPLACE_FUNCTION(OSReceiveMessage, LIBRARY_COREINIT, OSReceiveMessage),
        REPLACE_FUNCTION(OSReleaseForeground, LIBRARY_COREINIT, OSReleaseForeground),
        REPLACE_FUNCTION(VPADRead, LIBRARY_VPAD, VPADRead),
        REPLACE_FUNCTION(WPADRead, LIBRARY_PADSCORE, WPADRead),
        REPLACE_FUNCTION_VIA_ADDRESS(SC17_FindClosestSymbol, 0xfff10218, 0xfff10218),
        REPLACE_FUNCTION_VIA_ADDRESS(KiGetAppSymbolName, 0xfff0e3a0, 0xfff0e3a0),

};

uint32_t method_hooks_size_hooks_static __attribute__((section(".data"))) = sizeof(method_hooks_hooks_static) / sizeof(function_replacement_data_t);