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.
Signed-off-by: Simon Glass <s...@chromium.org>
Signed-off-by: Simon Glass <s...@chromium.org>
Reviewed-by: Simon Glass <s...@chromium.org>
---
arch/sandbox/cpu/os.c | 89 +++++++++++++++++++++++++++++++++++++++++++++++++++
include/os.h | 19 +++++++++++
2 files changed, 108 insertions(+)
diff --git a/arch/sandbox/cpu/os.c b/arch/sandbox/cpu/os.c
index 725b505..d811f74 100644
--- a/arch/sandbox/cpu/os.c
+++ b/arch/sandbox/cpu/os.c
@@ -438,3 +438,92 @@ 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);
+}
diff --git a/include/os.h b/include/os.h
index b65fba4..8039e93 100644
--- a/include/os.h
+++ b/include/os.h
@@ -245,4 +245,23 @@ int os_write_ram_buf(const char *fname);
*/
int os_read_ram_buf(const char *fname);
+/**
+ * Jump to a new executable image
+ *
+ * This uses exec() to run a new executable image, after putting it in a
+ * temporary file. The same arguments and environment are passed to this
+ * new image, with the addition of:
+ *
+ * -j <filename> Specifies the filename the image was written to. The
+ * calling image may want to delete this at some point.
+ * -m <filename> Specifies the file containing the sandbox memory
+ * (ram_buf) from this image, so that the new image can
+ * have access to this. It also means that the original
+ * memory filename passed to U-Boot will be left intact.
+ *
+ * @param dest Buffer containing executable image
+ * @param size Size of buffer
+ */
+int os_jump_to_image(const void *dest, int size);
+
#endif
--
1.8.4.1
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