sandbox: Refactor code to create os_jump_to_file()

At present os_jump_to_image() jumps to a given image, and this is written
to a file. But it is useful to be able to jump to a file also.

To avoid duplicating code, split out the implementation of
os_jump_to_image() into a new function that jumps to a file.

Signed-off-by: Simon Glass <sjg@chromium.org>

diff --git a/arch/sandbox/cpu/os.c b/arch/sandbox/cpu/os.c
index 3e0f4c3..acc5e70 100644 (file)
--- a/arch/sandbox/cpu/os.c
+++ b/arch/sandbox/cpu/os.c
@@ -563,7 +563,18 @@ static int make_exec(char *fname, const void *data, int size)
        return 0;
 }
 
-static int add_args(char ***argvp, const char *add_args[], int count)
+/**
+ * add_args() - Allocate a new argv with the given args
+ *
+ * This is used to create a new argv array with all the old arguments and some
+ * new ones that are passed in
+ *
+ * @argvp:  Returns newly allocated args list
+ * @add_args: Arguments to add, each a string
+ * @count: Number of arguments in @add_args
+ * @return 0 if OK, -ENOMEM if out of memory
+ */
+static int add_args(char ***argvp, char *add_args[], int count)
 {
        char **argv;
        int argc;
@@ -584,21 +595,26 @@ static int add_args(char ***argvp, const char *add_args[], int count)
        return 0;
 }
 
-int os_jump_to_image(const void *dest, int size)
+/**
+ * os_jump_to_file() - Jump to a new program
+ *
+ * This saves the memory buffer, sets up arguments to the new process, then
+ * execs it.
+ *
+ * @fname: Filename to exec
+ * @return does not return on success, any return value is an error
+ */
+static int os_jump_to_file(const char *fname)
 {
        struct sandbox_state *state = state_get_current();
-       char fname[30], mem_fname[30];
+       char mem_fname[30];
        int fd, err;
-       const char *extra_args[5];
+       char *extra_args[5];
        char **argv = state->argv;
 #ifdef DEBUG
-       int argc, i;
+       int i;
 #endif
 
-       err = make_exec(fname, dest, size);
-       if (err)
-               return err;
-
        strcpy(mem_fname, "/tmp/u-boot.mem.XXXXXX");
        fd = mkstemp(mem_fname);
        if (fd < 0)
@@ -611,7 +627,7 @@ int os_jump_to_image(const void *dest, int size)
        os_fd_restore();
 
        extra_args[0] = "-j";
-       extra_args[1] = fname;
+       extra_args[1] = (char *)fname;
        extra_args[2] = "-m";
        extra_args[3] = mem_fname;
        extra_args[4] = "--rm_memory";
@@ -636,6 +652,18 @@ int os_jump_to_image(const void *dest, int size)
        return unlink(fname);
 }
 
+int os_jump_to_image(const void *dest, int size)
+{
+       char fname[30];
+       int err;
+
+       err = make_exec(fname, dest, size);
+       if (err)
+               return err;
+
+       return os_jump_to_file(fname);
+}
+
 int os_find_u_boot(char *fname, int maxlen)
 {
        struct sandbox_state *state = state_get_current();