#!/usr/bin/env python3

import os
import sys
import pefile
import shutil

if len(sys.argv) < 2:
    print("[afl-wine-trace] usage: wine-cov binary [args...]\n")
    exit(1)

if os.getenv("AFL_PATH"):
    my_dir = os.getenv("AFL_PATH")
else:
    my_dir = os.path.dirname(os.path.abspath(__file__))

os.environ["WINELOADERNOEXEC"] = "1"

pe = pefile.PE(sys.argv[1])

if "AFL_ENTRYPOINT" not in os.environ:
    os.environ["AFL_ENTRYPOINT"] = "0x%x" % (pe.OPTIONAL_HEADER.ImageBase + pe.OPTIONAL_HEADER.AddressOfEntryPoint)
if not os.getenv("AFL_INST_LIBS"):
    if "AFL_CODE_START" not in os.environ:
        os.environ["AFL_CODE_START"] = "0x%x" % (pe.OPTIONAL_HEADER.ImageBase + pe.OPTIONAL_HEADER.BaseOfCode)
    if "AFL_CODE_END" not in os.environ:
        os.environ["AFL_CODE_END"] = "0x%x" % (pe.OPTIONAL_HEADER.ImageBase + pe.OPTIONAL_HEADER.BaseOfCode + pe.OPTIONAL_HEADER.SizeOfCode)

if pe.FILE_HEADER.Machine == pefile.MACHINE_TYPE["IMAGE_FILE_MACHINE_AMD64"] or pe.FILE_HEADER.Machine == pefile.MACHINE_TYPE["IMAGE_FILE_MACHINE_IA64"]:
    os.environ["LD_PRELOAD"] = os.path.join(my_dir, "qemu_mode/unsigaction/unsigaction64.so")
else:
    os.environ["LD_PRELOAD"] = os.path.join(my_dir, "qemu_mode/unsigaction/unsigaction32.so")

if os.getenv("WINECOV_QEMU_PATH"):
    qemu_path = os.getenv("WINECOV_QEMU_PATH")
elif os.path.exists(os.path.join(my_dir, "afl-qemu-trace")):
    qemu_path = os.path.join(my_dir, "afl-qemu-trace")
else:
    qemu_path = "qemu-"
    if pe.FILE_HEADER.Machine == pefile.MACHINE_TYPE["IMAGE_FILE_MACHINE_AMD64"] or pe.FILE_HEADER.Machine == pefile.MACHINE_TYPE["IMAGE_FILE_MACHINE_IA64"]:
        qemu_path += "x86_64"
    elif pe.FILE_HEADER.Machine == pefile.MACHINE_TYPE["IMAGE_FILE_MACHINE_I386"]:
        qemu_path += "i386"
    else:
        print ("[wine-cov] unsuppoted architecture\n")
        exit(1)
    qemu_path = shutil.which(qemu_path)

if os.getenv("WINECOV_WINE_PATH"):
    wine_path = os.getenv("WINECOV_WINE_PATH")
else:
    wine_path = "/usr/lib/wine/wine"
    if pe.FILE_HEADER.Machine == pefile.MACHINE_TYPE["IMAGE_FILE_MACHINE_AMD64"] or pe.FILE_HEADER.Machine == pefile.MACHINE_TYPE["IMAGE_FILE_MACHINE_IA64"]:
        wine_path += "64"
    elif pe.FILE_HEADER.Machine == pefile.MACHINE_TYPE["IMAGE_FILE_MACHINE_I386"]:
        pass
    else:
        print ("[afl-wine-trace] unsopported architecture\n")
        exit(1)

os.execve(qemu_path, [qemu_path, wine_path] + sys.argv[1:], os.environ)