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