125 lines
2.4 KiB
Bash
Executable File
125 lines
2.4 KiB
Bash
Executable File
#!/bin/bash
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set -Eeuo pipefail
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trap on_error SIGINT SIGTERM ERR
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ScriptFullname=$(readlink -e "$0")
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ScriptName=$(basename "$0")
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TargetFile=""
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BackupFile=""
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RxSetGameUnranked='KFGameInfo\w+SetGameUnranked'
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RxValidateForXP='KFGameInfo\w+ValidateForXP'
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LoadAddr=''
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function show_help ()
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{
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echo "Usage:"
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echo "${ScriptName} FILENAME [BACKUPNAME] patch specified kf2 executable"
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echo "${ScriptName} -h, --help show help"
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echo ""
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echo "Dependencies: dd, readelf, hexdump"
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}
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function on_error ()
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{
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trap - SIGINT SIGTERM ERR
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echo "Process aborted."
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restore
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}
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function backup ()
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{
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if [[ -z "$BackupFile" ]]; then
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BackupFile="$TargetFile.orig"
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fi
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cp -f "$TargetFile" "$BackupFile"
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}
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function restore ()
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{
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if [[ -z "$BackupFile" ]]; then
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BackupFile="$TargetFile.orig"
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fi
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if [[ -e "$BackupFile" ]]; then
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mv -f "$BackupFile" "$TargetFile"
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echo "Original executable restored"
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fi
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}
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function set_load_addr ()
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{
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LoadAddr=$(
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readelf -l -W "$TargetFile" | \
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grep -P 'LOAD\s+0x000000' | \
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awk '{ print $3 }' | \
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grep -Po '[1-9a-f][0-9a-f]+')
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}
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function target_addr () # $1: TargetRegexp
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{
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local Offset=$(readelf -s -W "$TargetFile" | \
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grep -P "$1" | \
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grep -v 'exec' | \
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head -n 1 | \
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awk '{ print $2 }' | \
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grep -Po '[1-9a-f][0-9a-f]+')
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echo $((16#$Offset - 16#$LoadAddr))
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}
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function patched ()
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{
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local ControlHexSGU=$(
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hexdump -ve '1/1 "%.2x"' \
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-s $(target_addr "$RxSetGameUnranked") \
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-n 1 "$TargetFile")
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local ControlHexVFX=$(
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hexdump -ve '1/1 "%.2x"' \
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-s $(target_addr "$RxValidateForXP") \
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-n 6 "$TargetFile")
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test "$ControlHexSGU" == "c3" && test "$ControlHexVFX" == "b801000000c3"
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}
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function apply_patch ()
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{
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printf '\xc3' | \
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dd of="$TargetFile" \
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bs=1 \
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seek=$(target_addr "$RxSetGameUnranked") \
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count=1 \
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conv=notrunc
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printf '\xb8\x01\x00\x00\x00\xc3' | \
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dd of="$TargetFile" \
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bs=1 \
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seek=$(target_addr "$RxValidateForXP") \
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count=6 \
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conv=notrunc
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echo "Successfully patched!"
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}
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function main ()
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{
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if ! [[ -w "$TargetFile" ]]; then
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echo "Can't write file. Make sure the file exists and it's read/write accessible."
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exit 1
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fi
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set_load_addr
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if patched; then
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echo "File already patched - skip."
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exit 0
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fi
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backup && apply_patch
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}
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if [[ $# -eq 0 ]]; then show_help; exit 0; fi
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case $1 in
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-h|--help ) show_help ; ;;
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* ) TargetFile="$1"; BackupFile="${2-}"; main ;;
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esac
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