262 lines
6.4 KiB
C
262 lines
6.4 KiB
C
/*
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* Atmosphère Fusée Secondary Storage parser.
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*
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* Copyright (c) 2019-2020 CTCaer
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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 <string.h>
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#include "fss.h"
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#include "hos.h"
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#include "../config.h"
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#include <libs/fatfs/ff.h>
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#include <mem/heap.h>
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#include "../storage/emummc.h"
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#include <storage/nx_sd.h>
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#include <gfx_utils.h>
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#define DPRINTF(...)
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extern hekate_config h_cfg;
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extern bool is_ipl_updated(void *buf, char *path, bool force);
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// FSS0 Magic and Meta header offset.
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#define FSS0_MAGIC 0x30535346
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#define FSS0_META_OFFSET 0x4
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#define FSS0_VERSION_0_17_0 0x110000
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// FSS0 Content Types.
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#define CNT_TYPE_FSP 0
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#define CNT_TYPE_EXO 1 // Exosphere (Secure Monitor).
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#define CNT_TYPE_WBT 2 // Warmboot (SC7Exit fw).
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#define CNT_TYPE_RBT 3 // Rebootstub (Warmboot based reboot fw).
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#define CNT_TYPE_SP1 4 // Sept Primary (TSEC and Sept Secondary loader).
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#define CNT_TYPE_SP2 5 // Sept Secondary (Acts as pkg11 and derives keys).
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#define CNT_TYPE_KIP 6 // KIP1 (Used for replacement or addition).
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#define CNT_TYPE_BMP 7
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#define CNT_TYPE_EMC 8
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#define CNT_TYPE_KLD 9 // Kernel Loader.
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#define CNT_TYPE_KRN 10 // Kernel.
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#define CNT_TYPE_EXF 11 // Exosphere Mariko fatal payload.
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// FSS0 Content Flags.
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#define CNT_FLAG0_EXPERIMENTAL BIT(0)
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// FSS0 Meta Header.
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typedef struct _fss_meta_t
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{
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u32 magic;
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u32 size;
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u32 crt0_off;
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u32 cnt_off;
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u32 cnt_count;
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u32 hos_ver;
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u32 version;
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u32 git_rev;
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} fss_meta_t;
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// FSS0 Content Header.
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typedef struct _fss_content_t
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{
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u32 offset;
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u32 size;
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u8 type;
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u8 flags0;
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u8 flags1;
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u8 flags2;
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u32 rsvd1;
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char name[0x10];
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} fss_content_t;
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int parse_fss(launch_ctxt_t *ctxt, const char *path, fss0_sept_t *sept_ctxt)
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{
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FIL fp;
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bool stock = false;
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int sept_used = 0;
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// Skip if stock and Exosphere and warmboot are not needed.
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if (!sept_ctxt)
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{
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bool pkg1_old = ctxt->pkg1_id->kb <= KB_FIRMWARE_VERSION_620;
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bool emummc_disabled = !emu_cfg.enabled || h_cfg.emummc_force_disable;
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LIST_FOREACH_ENTRY(ini_kv_t, kv, &ctxt->cfg->kvs, link)
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{
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if (!strcmp("stock", kv->key))
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if (kv->val[0] == '1')
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stock = true;
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}
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#ifdef HOS_MARIKO_STOCK_SECMON
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if (stock && emummc_disabled && (pkg1_old || h_cfg.t210b01))
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#else
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if (stock && emummc_disabled && pkg1_old)
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#endif
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return 1;
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}
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if (f_open(&fp, path, FA_READ) != FR_OK)
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return 0;
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void *fss = malloc(f_size(&fp));
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// Read first 1024 bytes of the fss file.
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f_read(&fp, fss, 1024, NULL);
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// Get FSS0 Meta header offset.
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u32 fss_meta_addr = *(u32 *)(fss + FSS0_META_OFFSET);
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fss_meta_t *fss_meta = (fss_meta_t *)(fss + fss_meta_addr);
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// Check if valid FSS0 and parse it.
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if (fss_meta->magic == FSS0_MAGIC)
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{
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bool mariko_not_supported = false;
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if (h_cfg.t210b01 && (fss_meta->version < FSS0_VERSION_0_17_0))
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{
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gfx_con.mute = false;
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mariko_not_supported = true;
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}
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gfx_printf("Found FSS0, Atmosphere %d.%d.%d-%08x\n"
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"Max HOS supported: %d.%d.%d\n"
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"Unpacking and loading components.. ",
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fss_meta->version >> 24, (fss_meta->version >> 16) & 0xFF, (fss_meta->version >> 8) & 0xFF, fss_meta->git_rev,
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fss_meta->hos_ver >> 24, (fss_meta->hos_ver >> 16) & 0xFF, (fss_meta->hos_ver >> 8) & 0xFF);
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if (mariko_not_supported)
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{
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EPRINTF("\nMariko not supported on < 0.17.0!");
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goto fail;
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}
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if (!sept_ctxt)
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{
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ctxt->atmosphere = true;
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ctxt->fss0_hosver = fss_meta->hos_ver;
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}
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// Parse FSS0 contents.
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fss_content_t *curr_fss_cnt = (fss_content_t *)(fss + fss_meta->cnt_off);
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void *content;
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for (u32 i = 0; i < fss_meta->cnt_count; i++)
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{
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content = (void *)(fss + curr_fss_cnt[i].offset);
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// Check if offset is inside limits.
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if ((curr_fss_cnt[i].offset + curr_fss_cnt[i].size) > fss_meta->size)
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continue;
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// If content is experimental and experimental flag is not enabled, skip it.
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if ((curr_fss_cnt[i].flags0 & CNT_FLAG0_EXPERIMENTAL) && !ctxt->fss0_experimental)
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continue;
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// Parse content.
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if (!sept_ctxt)
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{
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// Prepare content context.
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switch (curr_fss_cnt[i].type)
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{
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case CNT_TYPE_KIP:
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if (stock)
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continue;
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merge_kip_t *mkip1 = (merge_kip_t *)malloc(sizeof(merge_kip_t));
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mkip1->kip1 = content;
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list_append(&ctxt->kip1_list, &mkip1->link);
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DPRINTF("Loaded %s.kip1 from FSS0 (size %08X)\n", curr_fss_cnt[i].name, curr_fss_cnt[i].size);
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break;
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case CNT_TYPE_KRN:
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if (stock)
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continue;
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ctxt->kernel_size = curr_fss_cnt[i].size;
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ctxt->kernel = content;
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break;
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case CNT_TYPE_EXO:
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ctxt->secmon_size = curr_fss_cnt[i].size;
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ctxt->secmon = content;
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break;
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case CNT_TYPE_EXF:
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ctxt->exofatal_size = curr_fss_cnt[i].size;
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ctxt->exofatal = content;
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break;
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case CNT_TYPE_WBT:
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if (h_cfg.t210b01)
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continue;
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ctxt->warmboot_size = curr_fss_cnt[i].size;
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ctxt->warmboot = content;
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break;
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default:
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continue;
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}
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// Load content to launch context.
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f_lseek(&fp, curr_fss_cnt[i].offset);
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f_read(&fp, content, curr_fss_cnt[i].size, NULL);
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}
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else
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{
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// Load sept content directly to launch context.
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switch (curr_fss_cnt[i].type)
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{
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case CNT_TYPE_SP1:
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f_lseek(&fp, curr_fss_cnt[i].offset);
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f_read(&fp, sept_ctxt->sept_primary, curr_fss_cnt[i].size, NULL);
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break;
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case CNT_TYPE_SP2:
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if (!memcmp(curr_fss_cnt[i].name, (sept_ctxt->kb < KB_FIRMWARE_VERSION_810) ? "septsecondary00" : "septsecondary01", 15))
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{
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f_lseek(&fp, curr_fss_cnt[i].offset);
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f_read(&fp, sept_ctxt->sept_secondary, curr_fss_cnt[i].size, NULL);
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sept_used = 1;
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goto out;
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}
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break;
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default:
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break;
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}
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}
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}
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out:
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gfx_printf("Done!\n");
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f_close(&fp);
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return (!sept_ctxt ? 1 : sept_used);
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}
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fail:
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f_close(&fp);
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free(fss);
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return 0;
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}
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int load_sept_from_ffs0(fss0_sept_t *sept_ctxt)
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{
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LIST_FOREACH_ENTRY(ini_kv_t, kv, &sept_ctxt->cfg_sec->kvs, link)
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{
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if (!strcmp("fss0", kv->key))
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return parse_fss(NULL, kv->val, sept_ctxt);
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}
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return 0;
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}
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