[FSS0] Add Fusee secondary storage parser

Using "fss0={sd path}" allows you to parse kips, exosphere and warmboot from a fusee secondary binary.

Exosphere and warmboot are overridable if these entries are defined after that.

Additionally any extra kip can be loaded as before via
kip1={sd path}/* for many
or
kip1={sd path} for a sigle one

Warning: Don't double load core kips like loader, pm, sm and ams_mitm. The result will be a hang.

Makefile

@@ -48,7 +48,7 @@ OBJS += $(addprefix $(BUILDDIR)/$(TARGET)/, \
 # Horizon.
 OBJS += $(addprefix $(BUILDDIR)/$(TARGET)/, \
 	nx_emmc.o \
-	hos.o hos_config.o pkg1.o pkg2.o secmon_exo.o sept.o \
+	hos.o hos_config.o pkg1.o pkg2.o fss.o secmon_exo.o sept.o \
 )
 
 # Libraries.

bootloader/hos/fss.c

@@ -0,0 +1,127 @@
+/*
+ * 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;
+	if (f_open(&fp, value, FA_READ) != FR_OK)
+		return 0;
+
+	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:;
+				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;
+}

bootloader/hos/fss.h

@@ -0,0 +1,24 @@
+/*
+ * 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/>.
+ */
+
+#ifndef _FSS_H_
+#define _FSS_H_
+
+#include "hos.h"
+
+int parse_fss(launch_ctxt_t *ctxt, const char *value);
+
+#endif

bootloader/hos/hos_config.c

@@ -19,6 +19,7 @@
 
 #include "hos.h"
 #include "hos_config.h"
+#include "fss.h"
 #include "../libs/fatfs/ff.h"
 #include "../mem/heap.h"
 #include "../utils/dirlist.h"
@@ -185,6 +186,11 @@ static int _config_atmosphere(launch_ctxt_t *ctxt, const char *value)
 	return 1;
 }
 
+static int _config_fss(launch_ctxt_t *ctxt, const char *value)
+{
+	return parse_fss(ctxt, value);
+}
+
 typedef struct _cfg_handler_t
 {
 	const char *key;
@@ -200,6 +206,7 @@ static const cfg_handler_t _config_handlers[] = {
 	{ "fullsvcperm", _config_svcperm },
 	{ "debugmode", _config_debugmode },
 	{ "atmosphere", _config_atmosphere },
+	{ "fss0", _config_fss },
 	{ NULL, NULL },
 };