mirror of
https://github.com/drasko/codezero.git
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98 lines
3.4 KiB
Python
98 lines
3.4 KiB
Python
# -*- mode: python; coding: utf-8; -*-
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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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# This program is free software: you can redistribute it and/or modify it under the terms of the GNU
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# General Public License as published by the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even
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# the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
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# License for more details.
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#
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# You should have received a copy of the GNU General Public License along with this program. If not, see
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# <http://www.gnu.org/licenses/>.
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#
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# Author: Russel Winder
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import os.path
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import subprocess
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import shutil
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Import('environment', 'images')
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e = environment.Clone()
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e.Append(LINKFLAGS = ['-T' + e['posixServicesDirectory'] + '/bootdesc/linker.lds'])
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e.Append(CPPPATH = ['#' + e['includeDirectory']])
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bootdescTemplate = \
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'''
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/* This file is autogenerated, do not edit by hand. */
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/* Supervisor task at load time. */
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struct svc_image {
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char name[16];
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unsigned int phys_start;
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unsigned int phys_end;
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} __attribute__((__packed__));
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/* Supervisor task descriptor at load time */
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struct bootdesc {
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int desc_size;
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int total_images;
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struct svc_image images[];
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} __attribute__((__packed__));
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struct bootdesc bootdesc = {
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.desc_size = sizeof(struct bootdesc) + sizeof(struct svc_image) * %s,
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.total_images = %s,
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.images = {
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%s
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},
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};
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'''
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imageTemplate = \
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''' [%s] = {
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.name = "%s",
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.phys_start = %s,
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.phys_end = %s,
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},
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'''
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def generateLocationData(image):
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process = subprocess.Popen('tools/pyelf/readelf.py --lma-start-end ' + image.path, shell=True, stdout=subprocess.PIPE)
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assert process.wait() == 0
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return (process.stdout.readline().strip(), process.stdout.readline().strip().split()[1], process.stdout.readline().strip().split()[1])
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def generateBootdesc(target, source, env):
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'''
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Extracts name, start, end information from the kernel and each svc task.
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Uses this information to produce bootdesc.c
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'''
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with open(target[0].path, 'w' ) as f:
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imagesString = ''
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numberOfImages = len(source) - 1
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for index in range(1, len(source)):
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imagesString += imageTemplate % ((index - 1,) + generateLocationData(source[index]))
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f.write(bootdescTemplate % (numberOfImages, numberOfImages, imagesString))
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def relocateBootdesc(target, source, env):
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name, start, end = generateLocationData(source[1])
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print "arm-none-linux-gnueabi-objcopy" + " --adjust-section-vma .data=" + end + " " + source[0].path
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# process = subprocess.Popen(executable='arm-none-linux-gnueabi-objcopy', args=(
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# '--adjust-section-vma .data=' + end,
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# source[0].path))
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# assert process.wait() == 0
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os.system("arm-none-linux-gnueabi-objcopy --adjust-section-vma .data=" + end + " " + source[0].path)
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shutil.copyfile(source[0].path, target[0].path)
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objects = e.Object(e.Command('bootdesc.c', images, generateBootdesc))
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Depends(objects, e['configFiles'])
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bootdesc = e.Command('bootdesc.axf', e.Program('bootdesc_intermediate', objects) + [images[1]] , relocateBootdesc)
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Depends(bootdesc, e['configFiles'])
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Return('bootdesc')
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