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hekate/bootloader/hos/fss.c

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/*
* Atmosphère Fusée Secondary Storage parser.
*
* Copyright (c) 2019 CTCaer
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <string.h>
#include "fss.h"
#include "hos.h"
#include "../libs/fatfs/ff.h"
#include "../mem/heap.h"
#include "../gfx/gfx.h"
#define DPRINTF(...)
#define FSS0_MAGIC 0x30535346
#define CNT_TYPE_FSP 0
#define CNT_TYPE_EXO 1
#define CNT_TYPE_WBT 2
#define CNT_TYPE_RBT 3
#define CNT_TYPE_SP1 4
#define CNT_TYPE_SP2 5
#define CNT_TYPE_KIP 6
#define CNT_TYPE_BMP 7
typedef struct _fss_t
{
u32 magic;
u32 size;
u32 crt0_off;
u32 cnt_off;
u32 cnt_count;
u32 hos_ver;
u32 version;
u32 git_rev;
} fss_t;
typedef struct _fss_content_t
{
u32 offset;
u32 size;
u32 type;
u32 rsvd1;
char name[0x10];
} fss_content_t;
int parse_fss(launch_ctxt_t *ctxt, const char *value)
{
FIL fp;
bool stock = false;
LIST_FOREACH_ENTRY(ini_kv_t, kv, &ctxt->cfg->kvs, link)
{
if (!strcmp("stock", kv->key))
if (kv->val[0] == '1')
stock = true;
}
if (stock && ctxt->pkg1_id->kb <= KB_FIRMWARE_VERSION_620)
return 1;
if (f_open(&fp, value, FA_READ) != FR_OK)
return 0;
ctxt->atmosphere = true;
void *fss = malloc(f_size(&fp));
// Read header.
f_read(&fp, fss, 0x400, NULL);
u32 fss_entry = *(u32 *)(fss + 4);
fss_t *fss_meta = (fss_t *)(fss + fss_entry);
if (fss_meta->magic == FSS0_MAGIC)
{
gfx_printf(&gfx_con, "Found FSS0, Atmosphere %d.%d.%d-%08x\n"
"Max HOS supported: %d.%d.%d\n"
"Unpacking and loading components.. ",
fss_meta->version >> 24, (fss_meta->version >> 16) & 0xFF, (fss_meta->version >> 8) & 0xFF, fss_meta->git_rev,
fss_meta->hos_ver >> 24, (fss_meta->hos_ver >> 16) & 0xFF, (fss_meta->hos_ver >> 8) & 0xFF);
fss_content_t *curr_fss_cnt = (fss_content_t *)(fss + fss_meta->cnt_off);
void *content;
for (int i = 0; i < fss_meta->cnt_count; i++)
{
content = (void *)(fss + curr_fss_cnt[i].offset);
if ((curr_fss_cnt[i].offset + curr_fss_cnt[i].size) > fss_meta->size)
continue;
// Load content to launch context.
switch (curr_fss_cnt[i].type)
{
case CNT_TYPE_KIP:
if (stock)
continue;
merge_kip_t *mkip1 = (merge_kip_t *)malloc(sizeof(merge_kip_t));
mkip1->kip1 = content;
list_append(&ctxt->kip1_list, &mkip1->link);
DPRINTF("Loaded %s.kip1 from FSS0 (size %08X)\n", curr_fss_cnt[i].name, curr_fss_cnt[i].size);
break;
case CNT_TYPE_EXO:
ctxt->secmon_size = curr_fss_cnt[i].size;
ctxt->secmon = content;
break;
case CNT_TYPE_WBT:
ctxt->warmboot_size = curr_fss_cnt[i].size;
ctxt->warmboot = content;
break;
default:
continue;
// TODO: add more types?
// case CNT_TYPE_SP1:
// case CNT_TYPE_SP2:
}
f_lseek(&fp, curr_fss_cnt[i].offset);
f_read(&fp, content, curr_fss_cnt[i].size, NULL);
}
gfx_printf(&gfx_con, "Done!\n");
f_close(&fp);
return 1;
}
f_close(&fp);
free(fss);
return 0;
}