Index: misc/mkhd.sh
===================================================================
--- misc/mkhd.sh	(revision 703d4d0d91749da8d558e9f0ec112f22d99afc32)
+++ misc/mkhd.sh	(revision 703d4d0d91749da8d558e9f0ec112f22d99afc32)
@@ -0,0 +1,73 @@
+#!/bin/bash
+
+if [ -z "${1}" -o -z "${2}" ]; then
+    echo "usage: mkhd.sh cross-nm elf-file"
+    exit 1
+fi
+
+CROSS_NM=${1}
+ELF_FILE=${2}
+
+${CROSS_NM} --help >/dev/null 2>&1
+
+if [ ${?} -ne 0 ]; then
+    echo "error while executing ${CROSS_NM}"
+    exit 1
+fi
+
+if [ ! -e ${ELF_FILE} ]; then
+    echo "${ELF_FILE} does not exist"
+    exit 1
+fi
+
+getsym() {
+    NAME=${1}
+    HEX=$(${CROSS_NM} ${ELF_FILE} | grep ' '${NAME}'$' | cut -c -8)
+    RET=$(printf '%d' 0x${HEX})
+    printf '  %7s  %10s  %6s\n' ${NAME} 0x${HEX} ${RET} >&2
+}
+
+echo "creating header for ${ELF_FILE}'s sections:" >&2
+echo >&2
+
+getsym _Lo_RAM; SYM_LO_RAM=${RET}
+getsym _etext;  SYM_ETEXT=${RET}
+getsym _edata;  SYM_EDATA=${RET}
+getsym _end;    SYM_END=${RET}
+
+echo >&2
+
+LEN_TEXT=$((${SYM_ETEXT} - ${SYM_LO_RAM}))
+LEN_DATA=$((${SYM_EDATA} - ${SYM_ETEXT}))
+LEN_BSS=$((${SYM_END} - ${SYM_EDATA}))
+
+out8() {
+    VAL8=${1}
+    HEX8=$(printf '%x' ${VAL8})
+    printf "\x${HEX8}"
+}
+
+out16() {
+    VAL16=${1}
+    HI16=$((VAL16 / 256))
+    LO16=$((VAL16 % 256))
+    out8 ${HI16}
+    out8 ${LO16}
+}
+
+out32() {
+    VAL32=${1}
+    HI32=$((VAL32 / 65536))
+    LO32=$((VAL32 % 65536))
+    out16 ${HI32}
+    out16 ${LO32}
+}
+
+out16 24602
+out32 ${LEN_TEXT}
+out32 ${LEN_DATA}
+out32 ${LEN_BSS}
+out32 0
+out32 0
+out32 ${SYM_LO_RAM}
+out16 65535