#!/bin/bash

exe="$1"
sym="$2"

die() {
    echo "$@" >&2
    exit 1
}

get_sym() {
    objdump -j .text -tT "$1" | grep " $2\$" || die "symbol not found"
}

hex_to_d() { printf "%d" "$1"; }
sum_hex()  { expr $(hex_to_d "$1") + $(hex_to_d "$2"); }

do_dump() {
    local addr=0x$1
    local size=0x$2
    objdump -dS --start-address=$addr --stop-address=$(printf "0x%016x" $(sum_hex $addr $size)) "$exe"
}

render_it() {
    local esc=$(printf "\033")

    sed -e "/^  [a-f0-9]\+:/{s/^.*$/$esc[34m&$esc[0m/}"
}

get_sym "$exe" "$sym" | while read addr flags1 flags2 sect size rest; do
    pager=
    if test -n "$TERM" -a "$TERM" != "dumb"; then
        do_dump "$addr" "$size" | render_it | env LESS=FRSX less
    else
        do_dump "$addr" "$size" | render_it
    fi
done