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2024-10-15 10:56:42 +08:00
commit dfe1701b69
2 changed files with 116 additions and 0 deletions
--- a/extract_c.py
+++ b/extract_c.py
@@ -0,0 +1,56 @@
+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)