sandbox: Support unmapping a file

Add the opposite of mapping, so that we can unmap and avoid running out of
address space.

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

1 files changed, 9 insertions, 0 deletions

diff --git a/include/os.h b/include/os.h
index 770d76e02f7..4cbcbd93a71 100644
--- a/include/os.h
+++ b/include/os.h
@@ -419,6 +419,15 @@ int os_read_file(const char *name, void **bufp, int *sizep);
  */
 int os_map_file(const char *pathname, int os_flags, void **bufp, int *sizep);
 
+/**
+ * os_unmap() - Unmap a file previously mapped
+ *
+ * @buf: Mapped address
+ * @size: Size in bytes
+ * Return:	0 if OK, -ve on error
+ */
+int os_unmap(void *buf, int size);
+
 /*
  * os_find_text_base() - Find the text section in this running process
  *