mirror of
https://github.com/Atmosphere-NX/Atmosphere.git
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141 lines
4.2 KiB
C
141 lines
4.2 KiB
C
/*
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* Copyright (c) 2018-2019 Atmosphère-NX
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <errno.h>
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#include <malloc.h>
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#include "utils.h"
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#include "panic.h"
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#include "exception_handlers.h"
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#include "loader.h"
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#include "chainloader.h"
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#include "stage2.h"
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#include "nxboot.h"
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#include "console.h"
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#include "fs_utils.h"
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#include "nxfs.h"
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#include "gpt.h"
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#include "display/video_fb.h"
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#include "sdmmc/sdmmc.h"
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#include "lib/log.h"
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extern void (*__program_exit_callback)(int rc);
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static __attribute__((__aligned__(0x200))) stage2_args_t g_stage2_args_store;
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static stage2_args_t *g_stage2_args;
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static bool g_do_nxboot;
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static void setup_env(void) {
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/* Initialize the display and console. */
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if (console_init() < 0) {
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generic_panic();
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}
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/* Set up exception handlers. */
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setup_exception_handlers();
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/* Initialize the file system by mounting the SD card. */
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if (nxfs_init() < 0) {
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fatal_error("Failed to initialize the file system: %s\n", strerror(errno));
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}
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}
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static void cleanup_env(void) {
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/* Terminate the file system. */
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nxfs_end();
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}
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static void exit_callback(int rc) {
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(void)rc;
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if (g_do_nxboot) {
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/* TODO: halt */
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} else {
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relocate_and_chainload();
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}
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}
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/* Allow for main(int argc, void **argv) signature. */
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#pragma GCC diagnostic ignored "-Wmain"
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int main(int argc, void **argv) {
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loader_ctx_t *loader_ctx = get_loader_ctx();
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/* Check argc. */
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if (argc != STAGE2_ARGC) {
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generic_panic();
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}
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g_stage2_args = &g_stage2_args_store;
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memcpy(g_stage2_args, (stage2_args_t *)argv[STAGE2_ARGV_ARGUMENT_STRUCT], sizeof(*g_stage2_args));
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/* Check stage2 version field. */
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if (g_stage2_args->version != 0) {
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generic_panic();
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}
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/* Override the global logging level. */
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log_set_log_level(g_stage2_args->log_level);
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/* Initialize the boot environment. */
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setup_env();
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print(SCREEN_LOG_LEVEL_DEBUG | SCREEN_LOG_LEVEL_NO_PREFIX, u8"Welcome to Atmosphère Fusée Stage 2!\n");
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print(SCREEN_LOG_LEVEL_DEBUG, "Stage 2 executing from: %s\n", (const char *)argv[STAGE2_ARGV_PROGRAM_PATH]);
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/* Load BCT0 from SD if needed. */
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if (strcmp(g_stage2_args->bct0, "") == 0) {
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uint32_t bct_tmp_buf[sizeof(g_stage2_args->bct0) / sizeof(uint32_t)] = {0};
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if (!read_from_file(bct_tmp_buf, sizeof(bct_tmp_buf) - 1, "atmosphere/config/BCT.ini")) {
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fatal_error("Failed to read BCT0 from SD!\n");
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}
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memcpy(g_stage2_args->bct0, bct_tmp_buf, sizeof(bct_tmp_buf));
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}
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/* This will load all remaining binaries off of the SD. */
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load_payload(g_stage2_args->bct0);
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print(SCREEN_LOG_LEVEL_INFO, "Loaded payloads!\n");
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g_do_nxboot = (loader_ctx->chainload_entrypoint == 0);
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if (g_do_nxboot) {
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print(SCREEN_LOG_LEVEL_INFO, "Now performing nxboot.\n");
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/* Start boot. */
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uint32_t boot_memaddr = nxboot_main();
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/* Terminate the boot environment. */
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cleanup_env();
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/* Finish boot. */
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nxboot_finish(boot_memaddr);
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} else {
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/* TODO: What else do we want to do in terms of argc/argv? */
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const char *path = get_loader_ctx()->file_paths_to_load[get_loader_ctx()->file_id_of_entrypoint];
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print(SCREEN_LOG_LEVEL_INFO, "Now chainloading.\n");
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g_chainloader_argc = 1;
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strcpy(g_chainloader_arg_data, path);
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/* Terminate the boot environment. */
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cleanup_env();
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}
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/* Finally, after the cleanup routines (__libc_fini_array, etc.) are called, chainload or halt ourselves. */
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__program_exit_callback = exit_callback;
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return 0;
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}
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