From 329dccc0675b97d8a1ab9debfb610165262f35c6 Mon Sep 17 00:00:00 2001 From: Heinrich Schuchardt Date: Tue, 27 Oct 2020 20:29:25 +0100 Subject: sandbox: implement reset Up to now the sandbox would shutdown upon a cold reset request. Instead it should be reset. In our coding we use static variables like LIST_HEAD(efi_obj_list). A reset can occur at any time, e.g. via an UEFI binary calling the reset service. The only safe way to return to an initial state is to relaunch the U-Boot binary. The reset implementation uses execv() to relaunch U-Boot. Signed-off-by: Heinrich Schuchardt Reviewed-by: Simon Glass --- include/os.h | 15 +++++++++++++++ 1 file changed, 15 insertions(+) (limited to 'include') diff --git a/include/os.h b/include/os.h index 1874ae674f..88dfb71c1a 100644 --- a/include/os.h +++ b/include/os.h @@ -355,4 +355,19 @@ int os_read_file(const char *name, void **bufp, int *sizep); */ void *os_find_text_base(void); +/** + * os_relaunch() - restart the sandbox + * + * This functions is used to implement the cold reboot of the sand box. + * @argv[0] specifies the binary that is started while the calling process + * stops immediately. If the new binary cannot be started, the process is + * terminated and 1 is set as shell return code. + * + * The PID of the process stays the same. All file descriptors that have not + * been opened with O_CLOEXEC stay open including stdin, stdout, stderr. + * + * @argv: NULL terminated list of command line parameters + */ +void os_relaunch(char *argv[]); + #endif -- cgit