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drasko |
#! /usr/bin/env python2.6
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# -*- mode: python; coding: utf-8; -*-
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#
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# Codezero -- a microkernel for embedded systems.
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#
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# Copyright © 2009 B Labs Ltd
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#
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import os, sys, shelve, glob
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from os.path import join
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PROJRELROOT = '../../'
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sys.path.append(os.path.abspath(os.path.join(os.path.dirname(__file__), PROJRELROOT)))
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sys.path.append(os.path.abspath('../'))
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from config.projpaths import *
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from config.configuration import *
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container_assembler_body = \
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'''
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.align 4
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.section .img.%d
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.incbin "%s"
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'''
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container_lds_start = \
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'''/*
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* Autogenerated linker script that embeds each image to be
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* placed in a single container.
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*
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* Copyright (C) 2009 B Labs
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*/
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SECTIONS
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{'''
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container_lds_body = \
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'''
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.img.%d : { *(.img.%d) }'''
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container_lds_end = \
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'''
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}
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'''
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# Create container build base as:
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# conts/linux -> build/cont[0-9]
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def source_to_builddir(srcdir, id):
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cont_builddir = \
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os.path.relpath(srcdir, \
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PROJROOT).replace("conts", \
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"cont" + str(id))
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return join(BUILDDIR, cont_builddir)
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class LinuxContainerPacker:
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def __init__(self, container, linux_builder, rootfs_builder, atags_builder):
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# Here, we simply attempt to get PROJROOT/conts as
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# PROJROOT/build/cont[0-9]
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self.CONTAINER_BUILDDIR_BASE = \
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source_to_builddir(join(PROJROOT,'conts'), container.id)
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self.container_lds_out = join(self.CONTAINER_BUILDDIR_BASE, \
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'container.lds')
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self.container_S_out = join(self.CONTAINER_BUILDDIR_BASE, 'container.S')
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self.container_elf_out = join(self.CONTAINER_BUILDDIR_BASE, \
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'container' + str(container.id) + '.elf')
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self.kernel_image_in = linux_builder.kernel_image
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self.rootfs_elf_in = rootfs_builder.rootfs_elf_out
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self.atags_elf_in = atags_builder.atags_elf_out
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def generate_container_assembler(self, source):
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with open(self.container_S_out, 'w+') as f:
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file_body = ""
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img_i = 0
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for img in source:
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file_body += container_assembler_body % (img_i, img)
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img_i += 1
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f.write(file_body)
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f.close()
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def generate_container_lds(self, source):
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with open(self.container_lds_out, 'w+') as f:
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img_i = 0
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file_body = container_lds_start
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for img in source:
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file_body += container_lds_body % (img_i, img_i)
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img_i += 1
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file_body += container_lds_end
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f.write(file_body)
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f.close()
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def pack_container(self, config):
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self.generate_container_lds([self.kernel_image_in, self.rootfs_elf_in, \
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self.atags_elf_in])
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self.generate_container_assembler([self.kernel_image_in, self.rootfs_elf_in, \
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self.atags_elf_in])
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os.system(config.toolchain_kernel + "gcc " + "-nostdlib -o %s -T%s %s" \
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% (self.container_elf_out, self.container_lds_out, \
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self.container_S_out))
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# Final file is returned so that the final packer needn't
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# get the packer object for this information
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return self.container_elf_out
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def clean(self):
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if os.path.exists(self.container_elf_out):
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shutil.rmtree(self.container_elf_out)
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if os.path.exists(self.container_lds_out):
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shutil.rmtree(self.container_lds_out)
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if os.path.exists(self.container_S_out):
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shutil.rmtree(self.container_S_out)
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class DefaultContainerPacker:
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def __init__(self, container, images_in):
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# Here, we simply attempt to get PROJROOT/conts as
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# PROJROOT/build/cont[0-9]
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self.CONTAINER_BUILDDIR_BASE = \
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source_to_builddir(join(PROJROOT,'conts'), container.id)
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if not os.path.exists(self.CONTAINER_BUILDDIR_BASE):
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os.mkdir(self.CONTAINER_BUILDDIR_BASE)
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self.container_lds_out = join(self.CONTAINER_BUILDDIR_BASE, \
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'container.lds')
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self.container_S_out = join(self.CONTAINER_BUILDDIR_BASE, 'container.S')
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self.container_elf_out = join(self.CONTAINER_BUILDDIR_BASE, \
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'container' + str(container.id) + '.elf')
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self.images_in = images_in
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def generate_container_assembler(self, source):
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with open(self.container_S_out, 'w+') as f:
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file_body = ""
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img_i = 0
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for img in source:
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file_body += container_assembler_body % (img_i, img)
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img_i += 1
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f.write(file_body)
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f.close()
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def generate_container_lds(self, source):
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with open(self.container_lds_out, 'w+') as f:
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img_i = 0
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file_body = container_lds_start
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for img in source:
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file_body += container_lds_body % (img_i, img_i)
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img_i += 1
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file_body += container_lds_end
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f.write(file_body)
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f.close()
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def pack_container(self, config):
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self.generate_container_lds(self.images_in)
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self.generate_container_assembler(self.images_in)
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os.system(config.toolchain_kernel + "gcc " + "-nostdlib -o %s -T%s %s" \
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% (self.container_elf_out, self.container_lds_out, \
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self.container_S_out))
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# Final file is returned so that the final packer needn't
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# get the packer object for this information
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return self.container_elf_out
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def clean(self):
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if os.path.exists(self.container_elf_out):
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shutil.rmtree(self.container_elf_out)
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if os.path.exists(self.container_lds_out):
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shutil.rmtree(self.container_lds_out)
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if os.path.exists(self.container_S_out):
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shutil.rmtree(self.container_S_out)
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