#! /bin/sh

#
# Copyright (C) 2007 Michal Kebrt
# 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.
#


OBJCOPY="$1"
LINK="_link.ld"
HEADER="_components.h"

shift 1

echo "OUTPUT_FORMAT(\"elf32-littlearm\")

ENTRY(start)

SECTIONS {
	.boot 0x0: AT (0) {
		*(BOOTSTRAP);
		*(.text);
		
		*(.rodata);
		*(.rodata.*);
		*(.data);		/* initialized data */
		*(.sdata);
		*(.sdata2);
		*(.sbss);
		*(.scommon);
		*(.bss);		/* uninitialized static variables */	
		*(COMMON); 		/* global variables */
		*(.reginfo);

		. = 0x4000;
		*(PT);			/* page table placed at 0x4000 */" > "$LINK"

echo '
/** @addtogroup arm32boot
 * @{
 */
/** @file
 *  @brief Components (kernel + tasks) related declarations.
 *
 *  Generated by the <code>pack</code> script. This script packs all the
 *  components (kernel + tasks) into one image (image.boot) and generates
 *  a code that initializes an array of #component_t structs.
 */

#ifndef ___COMPONENTS_H__
#define ___COMPONENTS_H__

/** Holds information about components packed to one image (kernel + tasks). */
typedef struct {
	/** Name. */
	char *name;
	/** Start address. */
	void *start;
	/** End address. */
	void *end;
	/** Size (in bytes). */
	unsigned int size;
} component_t;

/** @}
*/

' > "$HEADER"

COUNT="0"
DATA=""

for TASK in "$@" ; do
	BASENAME="`basename "$TASK" | sed 's/^\(.*\)\.[^.]*$/\1/'`"
	OBJECT="${BASENAME}.o"
	SYMBOL="`echo "_binary_$TASK" | tr "./" "__"`"
	MACRO="`echo "$BASENAME" | tr [:lower:] [:upper:]`"
	echo "$TASK -> $OBJECT"
	
	echo "
		. = ALIGN(4096);
		*(.${BASENAME}_image);" >> "$LINK"
	
	echo "
extern int ${SYMBOL}_start;
extern int ${SYMBOL}_end;

#define ${MACRO}_START ((void *) &${SYMBOL}_start)
#define ${MACRO}_END ((void *) &${SYMBOL}_end)
#define ${MACRO}_SIZE ((unsigned int) ${MACRO}_END - (unsigned int) ${MACRO}_START)" >> "$HEADER"
	
	"$OBJCOPY" -I binary -O elf32-littlearm -B arm --rename-section ".data=.${BASENAME}_image" "$TASK" "$OBJECT"
		
	DATA="${DATA}
	components[$COUNT].name = \"${BASENAME}\";
	components[$COUNT].start = ${MACRO}_START;
	components[$COUNT].end = ${MACRO}_END;
	components[$COUNT].size = ${MACRO}_SIZE;";
	COUNT="`expr "$COUNT" + 1`"
done

echo '	}
}' >> "$LINK"

echo "
#define COMPONENTS $COUNT

/** Initializes array of components. */
static void init_components(component_t components[])
{
$DATA
}

#endif

" >> "$HEADER"