fss0: Support experimental content

Use key `fss0experimental=1` in a boot entry with `fss0=` defined to enable experimental content.

(Older versions of hekate will just skip any experimental content.)

bootloader/hos/fss.c

@@ -44,6 +44,8 @@ extern bool is_ipl_updated(void *buf, char *path, bool force);
 #define CNT_TYPE_BMP 7
 #define CNT_TYPE_EMC 8
 
+#define CNT_FLAG0_EXPERIMENTAL (1 << 0)
+
 typedef struct _fss_t
 {
 	u32 magic;
@@ -60,7 +62,10 @@ typedef struct _fss_content_t
 {
 	u32 offset;
 	u32 size;
-	u32 type;
+	u8 type;
+	u8 flags0;
+	u8 flags1;
+	u8 flags2;
 	u32 rsvd1;
 	char name[0x10];
 } fss_content_t;
@@ -142,6 +147,9 @@ int parse_fss(launch_ctxt_t *ctxt, const char *path, fss0_sept_t *sept_ctxt)
 			if ((curr_fss_cnt[i].offset + curr_fss_cnt[i].size) > fss_meta->size)
 				continue;
 
+			if ((curr_fss_cnt[i].flags0 & CNT_FLAG0_EXPERIMENTAL) && !ctxt->fss0_enable_experimental)
+				continue;
+
 			// Load content to launch context.
 			if (!sept_ctxt)
 			{

bootloader/hos/hos.h

@@ -67,6 +67,7 @@ typedef struct _launch_ctxt_t
 	bool atmosphere;
 	bool exo_no_user_exceptions;
 	bool exo_user_pmu;
+	bool fss0_enable_experimental;
 	bool emuMMC;
 
 	ini_sec_t *cfg;

bootloader/hos/hos_config.c

@@ -213,6 +213,15 @@ static int _config_exo_user_pmu_access(launch_ctxt_t *ctxt, const char *value)
 
 static int _config_fss(launch_ctxt_t *ctxt, const char *value)
 {
+	LIST_FOREACH_ENTRY(ini_kv_t, kv, &ctxt->cfg->kvs, link)
+	{
+		if (!strcmp("fss0experimental", kv->key))
+		{
+			ctxt->fss0_enable_experimental = *kv->val == '1';
+			break;
+		}
+	}
+
 	return parse_fss(ctxt, value, NULL);
 }