tools/binman/etype/u_boot_spl_bss_pad.py

   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
  11 import command
  12 import elf
  13 from entry import Entry
  14 from blob import Entry_blob
  15 import tools
  16
  17 class 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