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#!/usr/bin/env python

#

# Copyright (c) 2008 Martin Decky

# All rights reserved.

#

# Redistribution and use in source and binary forms, with or without

# modification, are permitted provided that the following conditions

# are met:

#

# - Redistributions of source code must retain the above copyright

#   notice, this list of conditions and the following disclaimer.

# - Redistributions in binary form must reproduce the above copyright

#   notice, this list of conditions and the following disclaimer in the

#   documentation and/or other materials provided with the distribution.

# - The name of the author may not be used to endorse or promote products

#   derived from this software without specific prior written permission.

#

# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR

# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES

# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.

# IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,

# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT

# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,

# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY

# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF

# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

#

"""

Binary package creator

"""

import sys

import os

import subprocess

def usage(prname):

    "Print usage syntax"

    print prname + " <OBJCOPY> <FORMAT> <OUTPUT_FORMAT> <ARCH> <ALIGNMENT>"

def main():

    if (len(sys.argv) < 6):

        usage(sys.argv[0])

        return

    if (not sys.argv[5].isdigit()):

        print "<ALIGNMENT> must be a number"

        return

    templatename = "_link.ld.in"

    workdir = os.getcwd()

    objcopy = sys.argv[1]

    format = sys.argv[2]

    output_format = sys.argv[3]

    arch = sys.argv[4]

    align = int(sys.argv[5], 0)

    link = file("_link.ld", "w")

    header = file("_components.h", "w")

    data = file("_components.c", "w")

    link.write("OUTPUT_FORMAT(\"" + output_format + "\")\n")

    link.write("OUTPUT_ARCH(" + arch + ")\n")

    link.write("ENTRY(start)\n\n")

    link.write("SECTIONS {\n")

    size = os.path.getsize(templatename)

    rd = 0

    template = file(templatename, "r")

    while (rd < size):

        buf = template.read(4096)

        link.write(buf)

        rd += len(buf)

    template.close()

    link.write("\n")

    header.write("#ifndef ___COMPONENTS_H__\n")

    header.write("#define ___COMPONENTS_H__\n\n")

    data.write("#include \"_components.h\"\n\n")

    data.write("void init_components(component_t *components)\n")

    data.write("{\n")

    cnt = 0

    for task in sys.argv[6:]:

        basename = os.path.basename(task)

        plainname = os.path.splitext(basename)[0]

        path = os.path.dirname(task)

        object = plainname + ".o"

        symbol = "_binary_" + basename.replace(".", "_")

        macro = plainname.upper()

        print task + " -> " + object

        link.write("\t\t. = ALIGN(" + ("%d" % align) + ");\n")

        link.write("\t\t*(." + plainname + "_image);\n\n")

        header.write("extern int " + symbol + "_start;\n")

        header.write("extern int " + symbol + "_end;\n\n")

        header.write("#define " + macro + "_START ((void *) &" + symbol + "_start)\n")

        header.write("#define " + macro + "_END ((void *) &" + symbol + "_end)\n")

        header.write("#define " + macro + "_SIZE ((unsigned int) " + macro + "_END - (unsigned int) " + macro + "_START)\n\n")

        data.write("\tcomponents[" + ("%d" % cnt) + "].name = \"" + plainname + "\";\n")

        data.write("\tcomponents[" + ("%d" % cnt) + "].start = " + macro + "_START;\n")

        data.write("\tcomponents[" + ("%d" % cnt) + "].end = " + macro + "_END;\n")

        data.write("\tcomponents[" + ("%d" % cnt) + "].size = " + macro + "_SIZE;\n\n")

        os.chdir(path)

        subprocess.call([objcopy,

            "-I", "binary",

            "-O", format,

            "-B", arch,

            "--rename-section", ".data=." + plainname + "_image",

            basename, os.path.join(workdir, object)])

        os.chdir(workdir)

        cnt = cnt + 1

    link.write("\t}\n")

    link.write("}\n")

    header.write("#define COMPONENTS " + ("%d" % cnt) + "\n\n")

    header.write("typedef struct {\n")

    header.write("\tchar *name;\n\n")

    header.write("\tvoid *start;\n")

    header.write("\tvoid *end;\n")

    header.write("\tunsigned int size;\n")

    header.write("} component_t;\n\n")

    header.write("extern void init_components(component_t *components);\n\n")

    header.write("#endif\n")

    data.write("}\n")

    link.close()

    header.close()

    data.close()

if __name__ == '__main__':

    main()