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#!/bin/sh
# $NetBSD: binpatch-x86-unknown-linux2.2-4.80.sh,v 1.1 2004/07/23 03:46:06 atatat Exp $
#
# ------------------------------------------------------------------------
# "THE BEER-WARE LICENSE" (Revision 42):
# Andrew Brown <atatat@NetBSD.org> wrote this file. As long as you
# retain this notice you can do whatever you want with this stuff.
# If we meet some day, and you think this stuff is worth it, you can
# buy me a beer in return.
# ------------------------------------------------------------------------
PATH=$1/bin:$PATH
export PATH
# % objdump -h netscape
# netscape: file format elf32-i386
#
file=$2
size=13823336
# % objdump -h netscape
# Sections:
# Idx Name Size VMA LMA File off Algn
# ...
# 12 .text 006c77ac 082819e0 082819e0 002399e0 2**4
# CONTENTS, ALLOC, LOAD, READONLY, CODE
#
# % objdump -d -j .text netscape
# ...
# 884f3e9: 6a 00 push $0x0
# 884f3eb: e8 24 06 a3 ff call 0x827fa14
# 884f3f0: e8 1f 0c a3 ff call 0x8280014
# ...
#
# 0x00884f3e9 - 0x0082819e0 + 0x002399e0 = 0x008073e9
#
offset=0x008073e9
# compare the push/call/call instruction bytes
#
compare=6a00e82406a3ffe81f0ca3ff
# the push instruction is two bytes long
#
skip=2
# five nops will overwrite the call to 0x827fa14
#
replace=9090909090
binpatch \
file=$file \
size=$size \
offset=$offset \
compare=$compare \
skip=$skip \
replace=$replace
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