1# Copyright (c) 2016 Google, Inc
2# Written by Simon Glass <sjg@chromium.org>
3#
4# SPDX-License-Identifier:      GPL-2.0+
5#
6# Entry-type module for BSS padding for spl/u-boot-spl.bin. This padding
7# can be added after the SPL binary to ensure that anything concatenated
8# to it will appear to SPL to be at the end of BSS rather than the start.
9#
10
11import command
12import elf
13from entry import Entry
14from blob import Entry_blob
15import tools
16
17class Entry_u_boot_spl_bss_pad(Entry_blob):
18    def __init__(self, image, etype, node):
19        Entry_blob.__init__(self, image, etype, node)
20
21    def ObtainContents(self):
22        fname = tools.GetInputFilename('spl/u-boot-spl')
23        bss_size = elf.GetSymbolAddress(fname, '__bss_size')
24        if not bss_size:
25            self.Raise('Expected __bss_size symbol in spl/u-boot-spl')
26        self.data = chr(0) * bss_size
27        self.contents_size = bss_size
28