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Fix Switch OTA launcher self-update via a bootstrap NRO.

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A running launcher cannot replace its own NRO on sdmc/FAT; stage the new
binary and chainload a tiny helper from romfs to swap it in before loading
the game.
This commit is contained in:
Andrew Quenehen
2026-08-06 09:59:01 -03:00
parent dd503706b0
commit 3fae3088ca
9 changed files with 204 additions and 9 deletions
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native/switch-ota-launcher/include/ota_fs.h
+6
View File
@@ -22,6 +22,12 @@ int ota_fs_atomic_replace_game(const char *install_dir, const char *verified_gam
int ota_fs_atomic_replace_nro(const char *install_dir, const char *nro_name,
const char *verified_nro, char *err, size_t err_len);
/* Stage a new launcher + copy romfs bootstrap; chainload bootstrap_out next.
* The running launcher cannot replace its own NRO on sdmc/FAT. */
int ota_fs_stage_launcher_bootstrap(const char *install_dir, const char *verified_launcher,
char *bootstrap_out, size_t bootstrap_out_len, char *err,
size_t err_len);
/* Hand off to game NRO via envSetNextLoad (Switch) or no-op stub (host). */
int ota_fs_handoff_to_game(const char *game_nro_path, char *err, size_t err_len);
native/switch-ota-launcher/include/ota_protocol.h
+3
View File
@@ -12,6 +12,9 @@ extern "C" {
#define OTA_LAUNCHER_NRO_NAME "gen1recomp.nro"
#define OTA_SAVE_DIR_NAME "pokemon-love2d"
#define OTA_INSTALL_DIR "switch/gen1recomp"
#define OTA_LAUNCHER_STAGED_SUFFIX ".staged"
#define OTA_BOOTSTRAP_ROMFS "romfs:/ota-bootstrap.nro"
#define OTA_BOOTSTRAP_SD_NAME "ota-bootstrap.nro"
#define OTA_RELEASES_API \
"https://api.github.com/repos/bryanthaboi/gen1recomp/releases/latest"