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authorSimon Glass <sjg@chromium.org>2014-02-27 13:26:15 -0700
committerSimon Glass <sjg@chromium.org>2014-03-17 20:05:48 -0600
commit47f5fcfb4169a8ff6e8c81738b77f8572f972e75 (patch)
tree328570b34cafd3ab21f64b75f9c3f1f625cd8c45 /arch/sandbox
parentb2a668b523ee78c56b466300350050924ed59553 (diff)
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sandbox: Add os_jump_to_image() to run another executable
For some tests it is useful to be able to run U-Boot again but pass on the same memory contents. Add a function to achieve this. Reviewed-by: Simon Glass <sjg@chromium.org> Signed-off-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'arch/sandbox')
-rw-r--r--arch/sandbox/cpu/os.c89
1 files changed, 89 insertions, 0 deletions
diff --git a/arch/sandbox/cpu/os.c b/arch/sandbox/cpu/os.c
index 98f565e..52e1096 100644
--- a/arch/sandbox/cpu/os.c
+++ b/arch/sandbox/cpu/os.c
@@ -443,3 +443,92 @@ int os_read_ram_buf(const char *fname)
return 0;
}
+
+static int make_exec(char *fname, const void *data, int size)
+{
+ int fd;
+
+ strcpy(fname, "/tmp/u-boot.jump.XXXXXX");
+ fd = mkstemp(fname);
+ if (fd < 0)
+ return -ENOENT;
+ if (write(fd, data, size) < 0)
+ return -EIO;
+ close(fd);
+ if (chmod(fname, 0777))
+ return -ENOEXEC;
+
+ return 0;
+}
+
+static int add_args(char ***argvp, const char *add_args[], int count)
+{
+ char **argv;
+ int argc;
+
+ for (argv = *argvp, argc = 0; (*argvp)[argc]; argc++)
+ ;
+
+ argv = malloc((argc + count + 1) * sizeof(char *));
+ if (!argv) {
+ printf("Out of memory for %d argv\n", count);
+ return -ENOMEM;
+ }
+ memcpy(argv, *argvp, argc * sizeof(char *));
+ memcpy(argv + argc, add_args, count * sizeof(char *));
+ argv[argc + count] = NULL;
+
+ *argvp = argv;
+ return 0;
+}
+
+int os_jump_to_image(const void *dest, int size)
+{
+ struct sandbox_state *state = state_get_current();
+ char fname[30], mem_fname[30];
+ int fd, err;
+ const char *extra_args[4];
+ char **argv = state->argv;
+#ifdef DEBUG
+ int argc, 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)
+ return -ENOENT;
+ close(fd);
+ err = os_write_ram_buf(mem_fname);
+ if (err)
+ return err;
+
+ os_fd_restore();
+
+ extra_args[0] = "-j";
+ extra_args[1] = fname;
+ extra_args[2] = "-m";
+ extra_args[3] = mem_fname;
+ err = add_args(&argv, extra_args,
+ sizeof(extra_args) / sizeof(extra_args[0]));
+ if (err)
+ return err;
+
+#ifdef DEBUG
+ for (i = 0; argv[i]; i++)
+ printf("%d %s\n", i, argv[i]);
+#endif
+
+ if (state_uninit())
+ os_exit(2);
+
+ err = execv(fname, argv);
+ free(argv);
+ if (err)
+ return err;
+
+ return unlink(fname);
+}