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>
diff --git a/arch/sandbox/cpu/os.c b/arch/sandbox/cpu/os.c
index b72dafc..873f85a 100644
--- a/arch/sandbox/cpu/os.c
+++ b/arch/sandbox/cpu/os.c
@@ -211,6 +211,16 @@
return 0;
}
+int os_unmap(void *buf, int size)
+{
+ if (munmap(buf, size)) {
+ printf("Can't unmap %p %x\n", buf, size);
+ return -EIO;
+ }
+
+ return 0;
+}
+
/* Restore tty state when we exit */
static struct termios orig_term;
static bool term_setup;
diff --git a/include/os.h b/include/os.h
index 770d76e..4cbcbd9 100644
--- a/include/os.h
+++ b/include/os.h
@@ -419,6 +419,15 @@
*/
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
*