catalyst_patch_load_extension.sh

catalyst_patch_load_extension.sh

#!/bin/sh

LOAD_EXTENSION_OFF=$(printf "%d" 0x`objdump -d $1 | grep -m1 '<LoadExtension@plt>:' | cut -d' ' -f1`)
LOAD_EXTENSION_LIST_OFF=$(printf "%d" 0x`objdump -d $1 | grep -m1 '<LoadExtensionList@plt>:' | cut -d' ' -f1`)

DIFF=$((LOAD_EXTENSION_LIST_OFF - LOAD_EXTENSION_OFF))

cat << EOF > patch$$.asm
BITS 64

mov rsi, rdx
xor rsi, rsi
inc rsi
jmp $((DIFF))
EOF

nasm -o patch$$.bin patch$$.asm

dd conv=notrunc if=patch.bin bs=1 count=14 seek=$LOAD_EXTENSION_OFF of=$1

rm patch$$.bin
rm patch$$.asm