import os
from idaapi import *
from idautils import *
from idc import *

def export_func_asm(file_name,func_addr):
    try:
        with open(file_name,"w+") as f:
            func_ea=get_func(func_addr)#获取有效函数地址对象
            func_name=get_func_name(func_addr)#获取函数名称
            f.write(f"Assembly for function {func_name} start:0x{func_ea.start_ea:x} end:0x{func_ea.end_ea:x}\n")
            for ea in Heads(func_ea.start_ea,func_ea.end_ea):#遍历
                asm_line=generate_disasm_line(ea,GENDSM_REMOVE_TAGS)#提取汇编，去除标签
                f.write(f"0x{ea:x}: {asm_line}\n")
    except Exception as msg:
        with open("my.log","a+") as f:#报错日志写入
            f.write(f"export_func_asm {func_name} -> {msg}")

def export_func(extractfile):
    if(extractfile is None):exit(-1)
    save_dir="result"
    asm_file=save_dir+"/"+extractfile
    func_file=save_dir+"/"+extractfile+"_extract.c"
    try:
        with open(func_file,"w") as file:
            for func_addr in Functions():#迭代器编译所有函数
                func_name=get_func_name(func_addr)#获取函数名称
                if(func_name in BLACK_LIST):continue#黑名单处理
                func_seg=getseg(func_addr)#获取函数段
                if(func_seg.name!=7 or func_seg.perm !=5):continue   #去除其他段函数
                tmp_filename=asm_file+"_"+func_name+".asm"  
                export_func_asm(tmp_filename,func_addr) #提取函数汇编
                code=decompile(func_addr) #反编译，提取c
                if code :
                    file.write(f"//Function: {func_name} ->0x{func_addr} {func_seg.name} perm->{func_seg.perm}\n")
                    file.write(str(code)+"\n\n") #写入文件
    except Exception as msg:
        with open("my.log","a+") as f:
            f.write(f"export_func {func_file} -> {msg}")
#函数黑名单
BLACK_LIST={
"_start","_dl_relocate_static_pie",
"deregister_tm_clones","register_tm_clones",
"__do_global_dtors_aux","frame_dummy",
}      
def main():
    extractfile="extract.c"
    filepath="tmp.txt"
    if (os.path.exists(filepath) and os.path.isfile(filepath) ):
        with open(filepath,"r") as f:
            extractfile=f.read() 
    export_func(extractfile)

if __name__ == "__main__":
    main()
    idaapi.qexit(0)