\u4f9d\u8d56\u73af\u5883<\/p>\n\n\n\n
$ sudo apt install python-dev libffi-dev build-essential virtualenvwrapper<\/code><\/pre>\n\n\n\n\u9694\u79bb\u73af\u5883<\/p>\n\n\n\n
$ mkvirtualenv angr\n$ sudo pip install angr<\/code><\/pre>\n\n\n\n\u6216\u8005\u770b\u8fd9\u4e2a<\/a><\/p>\n\n\n\n\u6a21\u7cca\u6d4b\u8bd5<\/h1>\n\n\n\n
\u901a\u8fc7\u5411\u76ee\u6807\u7cfb\u7edf\u63d0\u4f9b\u975e\u9884\u671f\u7684\u8f93\u5165\u5e76\u76d1\u89c6\u5f02\u5e38\u7ed3\u679c\u6765\u53d1\u73b0\u8f6f\u4ef6\u6f0f\u6d1e\u3002
\u5728\u6a21\u7cca\u6d4b\u8bd5\u4e2d\uff0c\u7528\u968f\u673a\u574f\u6570\u636e(\u4e5f\u79f0\u505a fuzz)\u653b\u51fb\u4e00\u4e2a\u7a0b\u5e8f\uff0c\u7136\u540e\u7b49\u7740\u89c2\u5bdf\u54ea\u91cc\u906d\u5230\u4e86\u7834\u574f\u3002\u6a21\u7cca\u6d4b\u8bd5\u7684\u6280\u5de7\u5728\u4e8e\uff0c\u5b83\u662f\u4e0d\u7b26\u5408\u903b\u8f91\u7684:\u81ea\u52a8\u6a21\u7cca\u6d4b\u8bd5\u4e0d\u53bb\u731c\u6d4b\u54ea\u4e2a\u6570\u636e\u4f1a\u5bfc\u81f4\u7834\u574f(\u5c31\u50cf\u4eba\u5de5\u6d4b\u8bd5\u5458\u90a3\u6837)\uff0c\u800c\u662f\u5c06\u5c3d\u53ef\u80fd\u591a\u7684\u6742\u4e71\u6570\u636e\u6295\u5165\u7a0b\u5e8f\u4e2d\u3002
\u6a21\u7cca\u6d4b\u8bd5\u7684\u5b9e\u73b0\u662f\u4e00\u4e2a\u975e\u5e38\u7b80\u5355\u7684\u8fc7\u7a0b:<\/p>\n\n\n\n
\n- \u51c6\u5907\u4e00\u4efd\u63d2\u5165\u7a0b\u5e8f\u4e2d\u7684\u6b63\u786e\u7684\u6587\u4ef6\u3002<\/li>\n\n\n\n
- \u7528\u968f\u673a\u6570\u636e\u66ff\u6362\u8be5\u6587\u4ef6\u7684\u67d0\u4e9b\u90e8\u5206\u3002<\/li>\n\n\n\n
- \u7528\u7a0b\u5e8f\u6253\u5f00\u6587\u4ef6\u3002<\/li>\n\n\n\n
- \u89c2\u5bdf\u7834\u574f\u4e86\u4ec0\u4e48\u3002
\u7531\u6a21\u7cca\u6d4b\u8bd5\u5bfc\u81f4\u7684\u8bb8\u591a\u6545\u969c\u90fd\u662f\u5185\u5b58\u5206\u914d\u9519\u8bef\u53ca\u7f13\u51b2\u5668\u6ea2\u51fa\u7684\u7ed3\u679c<\/li>\n<\/ol>\n\n\n\n# \u7528\u968f\u673a\u6570\u636e\u66ff\u6362\u6587\u4ef6\u90e8\u5206\u7684\u7c7bimport java . io . * ;\n\nimport java.security.SecureRandom;\n\nimport java.util.Random;\n\npublic class Fuzzer {\n\nprivate Random random = new SecureRandom();\n\nprivate int count = 1;\n\npublic File fuzz(File in, int start, int length) throws IOException\n\n{\n\nbyte[] data = new byte[(int) in.length()];\n\nDataInputStream din = new DataInputStream(new FileInputStream(in));\n\ndin.readFully(data);\n\nfuzz(data, start, length);\n\nString name = \"fuzz_\" + count + \"_\" + in.getName();\n\nFile fout = new File(name);\n\nFileOutputStream out = new FileOutputStream(fout);\n\nout.write(data);\n\nout.close();\n\ndin.close();\n\ncount++;\n\nreturn fout;\n\n}\n\n\/\/ Modifies byte array in place\n\npublic void fuzz(byte[] in, int start, int length) {\n\nbyte[] fuzz = new byte[length];\n\nrandom.nextBytes(fuzz);\n\nSystem.arraycopy(fuzz, 0, in, start, fuzz.length);\n\n}\n\n}<\/code><\/pre>\n\n\n\n\n- \u6709\u5185\u5b58\u9650\u5236\uff0c\u53ef\u80fd\u56e0\u4e3a\u5185\u5b58\u6ea2\u51fa\u800c\u5d29\u6e83\uff0c\u5de5\u4e1a\u7ea7fuzzer\u901a\u5e38\u4f1a\u4f7f\u7528\u6d41\u5f0f\u5904\u7406\u6216\u5185\u5b58\u6620\u5c04\u6587\u4ef6<\/li>\n\n\n\n
- \u6709\u53ef\u80fd\u6539\u53d8\u9b54\u6570<\/li>\n\n\n\n
- \u751f\u6210\u566a\u97f3\uff0c\u5185\u5b58\u8986\u76d6\uff0c\u633a\u57fa\u7840\u7684\u811a\u672c<\/li>\n<\/ul>\n\n\n\n
\u7b26\u53f7\u6267\u884c<\/h1>\n\n\n\n
\u7b26\u53f7\u6280\u672f\u5f25\u5408\u4e86\u9759\u6001\u548c\u52a8\u6001\u5206\u6790\u4e4b\u95f4\u7684\u5dee\u8ddd\uff0c\u5e76\u63d0\u4f9b\u4e86\u4e00\u79cd\u89e3\u51b3\u65b9\u6848\u6765\u5e94\u5bf9\u6a21\u7cca\u6d4b\u8bd5\u7684\u6709\u9650\u8bed\u4e49\u6d1e\u5bdf\u529b\u3002\u52a8\u6001\u7b26\u53f7\u6267\u884c\u662f\u7b26\u53f7\u6267\u884c\u7684\u4e00\u4e2a\u5b50\u96c6\uff0c\u662f\u4e00\u79cd\u52a8\u6001\u6280\u672f\uff0c\u56e0\u4e3a\u5b83\u5728\u6a21\u62df\u73af\u5883\u4e2d\u6267\u884c\u7a0b\u5e8f\u3002
\u7136\u800c\uff0c\u8fd9\u79cd\u6267\u884c\u53d1\u751f\u5728\u7b26\u53f7\u53d8\u91cf\u7684\u62bd\u8c61\u57df\u4e2d\u3002\u5f53\u8fd9\u4e9b\u7cfb\u7edf\u6a21\u62df\u5e94\u7528\u7a0b\u5e8f\u65f6\uff0c\u5b83\u4eec\u5728\u6574\u4e2a\u7a0b\u5e8f\u6267\u884c\u8fc7\u7a0b\u4e2d\u8ddf\u8e2a\u5bc4\u5b58\u5668\u548c\u5185\u5b58\u7684\u72b6\u6001\u4ee5\u53ca\u5bf9\u8fd9\u4e9b\u53d8\u91cf\u7684\u7ea6\u675f\u3002\u6bcf\u5f53\u5230\u8fbe\u6761\u4ef6\u5206\u652f\u65f6\uff0c\u6267\u884c\u5206\u652f\u5e76\u9075\u5faa\u4e24\u6761\u8def\u5f84\uff0c\u5c06\u5206\u652f\u6761\u4ef6\u4fdd\u5b58\u4e3a\u5bf9\u91c7\u7528\u5206\u652f\u7684\u8def\u5f84\u7684\u7ea6\u675f\uff0c\u5e76\u5c06\u5206\u652f\u6761\u4ef6\u7684\u9006\u4f5c\u4e3a\u5bf9\u672a\u91c7\u7528\u5206\u652f\u7684\u8def\u5f84\u7684\u7ea6\u675f\u3002<\/p>\n\n\n\n
libVEX<\/h1>\n\n\n\n
VEX IR\u662f\u4e00\u79cd\u66f4\u52a0\u63a5\u8fd1\u4e8ecompiler\u4f7f\u7528\u7684\u4e2d\u95f4\u8bed\u8a00\/\u4e2d\u95f4\u8868\u793a\uff0c\u5b83\u662f\u4e0d\u4f9d\u8d56\u4e8e\u7279\u5b9a\u4f53\u7cfb\u67b6\u6784\u7684\u3002<\/p>\n\n\n\n
Code Blocks<\/h2>\n\n\n\n
Code Blocks\u662fvex\u5904\u7406\u4ee3\u7801\u7684\u4e00\u4e2a\u5355\u5143\uff0c\u4f7f\u7528IRSB\u7ed3\u6784\u4f53\u8868\u793a<\/p>\n\n\n\n
\/* Code blocks, which in proper compiler terminology are superblocks\n (single entry, multiple exit code sequences) contain:\u3000\u3000\u3010\u4e0eIntel Pin\u4e2d\u7684\u6982\u5ff5trace\u662f\u76f8\u4f3c\u7684\u3011\n \n - A table giving a type for each temp (the \"type environment\")\n - An expandable array of statements\n - An expression of type 32 or 64 bits, depending on the\n guest's word size, indicating the next destination if the block\n executes all the way to the end, without a side exit\n - An indication of any special actions (JumpKind) needed\n for this final jump.\n \n \"IRSB\" stands for \"IR Super Block\".\n*\/\ntypedef\n struct {\n IRTypeEnv* tyenv;\n IRStmt** stmts;\n Int stmts_size;\n Int stmts_used;\n IRExpr* next;\n IRJumpKind jumpkind;\n }\n IRSB;<\/code><\/pre>\n\n\n\nEach IRSB contains three things:\n - a type environment, which indicates the type of each temporary\n value present in the IRSB\n - a list of statements, which represent code\n - a jump that exits from the end the IRSB<\/code><\/pre>\n\n\n\nStatements and Expressions<\/h2>\n\n\n\nStatements (type 'IRStmt') represent operations with side-effects,\n eg. guest register writes, stores, and assignments to temporaries.\n Expressions (type 'IRExpr') represent operations without\n side-effects, eg. arithmetic operations, loads, constants.\n Expressions can contain sub-expressions, forming expression trees,\n eg. (3 + (4 * load(addr1)).<\/code><\/pre>\n\n\n\nStatements\uff1a IRStmt\uff1a\u4ee3\u8868\u7740\u6709side-effect\u7684\u64cd\u4f5c
Expressions: IRExpr\uff1a\u4ee3\u8868\u7740\u6ca1\u6709side-effect\u7684\u64cd\u4f5c<\/p>\n\n\n\n
Storage of guest state<\/h2>\n\n\n\n
guest state\uff0c\u5176\u5b9e\u5c31\u662f\u4ee3\u8868\u76ee\u6807\u673a\u5668\u5bc4\u5b58\u5668\u7684\u4e00\u7247\u8fde\u7eed\u7684\u7f13\u5b58\u3002\u5728\u8fd9\u7247\u7f13\u5b58\u4e0a\u53ef\u4ee5\u8fdb\u884cPut\/Get\u64cd\u4f5c\u3002
Put\/Get\u64cd\u4f5c\u9700\u8981\u63d0\u4f9b\u4e24\u4e2a\u53c2\u6570\uff1a\u5728\u4ee3\u8868guest state\u7684\u7f13\u5b58\u4e2d\u7684offset\u548c\u4ee3\u8868\u64cd\u4f5c\u6570\u957f\u5ea6\u7684type<\/p>\n\n\n\n
angr<\/h1>\n\n\n\n
\u7b26\u53f7\u6267\u884c\uff0c\u81ea\u52a8\u5316\u6c42\u89e3\u8f93\u5165\uff0c\u50cf\u4e00\u4e2a\u865a\u62df\u673a\uff0c\u4f1a\u8bfb\u53d6\u6bcf\u4e00\u6761\u6307\u4ee4\u5728\u865a\u62df\u673a\u4e2d\u6a21\u62df\u8be5\u547d\u4ee4\u7684\u884c\u4e3a
angr \u4f7f\u7528 z3 \u4f5c\u4e3a\u7ea6\u675f\u6c42\u89e3\u5668\uff0c\u6709\u70b9\u50cf\u662f\u5b83\u5728\u6536\u96c6\u6570\u5b66\u516c\u5f0f\u7136\u540e\u628a\u5b83\u4e22\u7ed9smt\u6c42\u89e3\u5668<\/p>\n\n\n\n
\u5c5e\u6027\uff0c\u6982\u5ff5<\/h2>\n\n\n\n
\u52a0\u8f7d\u4e8c\u8fdb\u5236\u6587\u4ef6\u751f\u6210project\uff08\u6216\u8005\u5bf9\u53ef\u6267\u884c\u6587\u4ef6\u8fdb\u884c\u5206\u6790\u548c\u6a21\u62df\uff09<\/p>\n\n\n\n
>>> import angr\n>>> proj = angr.Project('\/bin\/true')<\/code><\/pre>\n\n\n\nproject\u57fa\u672c\u5c5e\u6027<\/h3>\n\n\n\n
cpu\u67b6\u6784\uff0c\u6587\u4ef6\u540d\uff0c\u5165\u53e3\u5730\u5740<\/p>\n\n\n\n
>>> import monkeyhex # \u6570\u503c\u7ed3\u679c\u5c06\u4ee5\u5341\u516d\u8fdb\u5236\u663e\u793a\n>>> proj.arch\n<Arch AMD64 (LE)>\n>>> proj.entry\n0x401670\n>>> proj.filename\n'\/bin\/true'<\/code><\/pre>\n\n\n\narchinfo.Arch\u7c7b\uff08\u53ca\u5176\u5b50\u7c7b\uff09\u662f\u4e00\u4e2a\u5305\u542b\u7279\u5b9aCPU\u67b6\u6784\u6240\u6709\u5fc5\u8981\u4fe1\u606f\u7684\u201c\u6570\u636e\u5e93\u201d\u3002\u5b83\u5b9a\u4e49\u4e86\u8be5\u67b6\u6784\u5982\u4f55\u5904\u7406\u6570\u636e\u3001\u6307\u4ee4\u548c\u5185\u5b58\uff0c\u4f7f\u5f97\u5206\u6790\u5de5\u5177\uff08\u5982angr\uff09\u80fd\u591f\u7406\u89e3\u4e8c\u8fdb\u5236\u4ee3\u7801\uff0c\u800c\u65e0\u9700\u786c\u7f16\u7801\u6bcf\u79cdCPU\u7684\u7ec6\u8282\u3002<\/em><\/p>\n\n\n\n\n- arch\u662farchinfo.Arch\u5bf9\u8c61\u7684\u4e00\u4e2a\u5b9e\u4f8b\uff0c\u8868\u793a\u7f16\u8bd1\u7a0b\u5e8f\u7684\u4f53\u7cfb\u7ed3\u6784\uff0c\u901a\u5e38\u5173\u6ce8\uff0carch.bits,arch.bytes,arch.name, arch.memory_endness<\/li>\n\n\n\n
- entry\u662f\u5165\u53e3\u5730\u5740<\/li>\n\n\n\n
- filename\u662f\u4e8c\u8fdb\u5236\u6587\u4ef6\u7684\u7edd\u5bf9\u8def\u5f84\u3002<\/li>\n<\/ul>\n\n\n\n
\u52a0\u8f7d\u5668<\/h3>\n\n\n\n
CLE\u6a21\u5757\u5904\u7406\u4ece\u4e8c\u8fdb\u5236\u6587\u4ef6\u5230\u865a\u62df\u5730\u5740\u7a7a\u95f4\u7684\u8868\u793a\uff0cCLE\u7684\u7ed3\u679c\u88ab\u79f0\u4e3a\u52a0\u8f7d\u5668\uff0c\u53ef\u4ee5\u901a\u8fc7.loader\u5c5e\u6027\u6765\u8c03\u7528\uff0c\u53ef\u4ee5\u7528\u6765\u67e5\u770b\u4e0e\u7a0b\u5e8f\u4e00\u8d77\u52a0\u8f7d\u7684\u5171\u4eab\u5e93\u548c\u67e5\u8be2\u52a0\u8f7d\u7684\u5730\u5740\u7a7a\u95f4<\/p>\n\n\n\n
>>> proj.loader\n<Loaded true, maps [0x400000:0x5004000]>\n\n>>> proj.loader.shared_objects # may look a little different for you!\n{'ld-linux-x86-64.so.2': <ELF Object ld-2.24.so, maps [0x2000000:0x2227167]>,\n 'libc.so.6': <ELF Object libc-2.24.so, maps [0x1000000:0x13c699f]>}\n\n>>> proj.loader.min_addr\n0x400000\n>>> proj.loader.max_addr\n0x5004000\n\n>>> proj.loader.main_object # \u4e3b\u6a21\u5757\n<ELF Object true, maps [0x400000:0x60721f]>\n\n>>> proj.loader.main_object.execstack # \u662f\u5426\u6709\u53ef\u6267\u884c\u5806\u6808\nFalse\n>>> proj.loader.main_object.pic # \u662f\u5426\u4f4d\u7f6e\u65e0\u5173\nTrue<\/code><\/pre>\n\n\n\nFactory<\/h3>\n\n\n\nblocks<\/h4>\n\n\n\n
project.factory.block()\u7528\u6765\u63d0\u53d6\u7ed9\u5b9a\u5730\u5740\u4ee3\u7801\u7684\u57fa\u672c\u5757
angr\u4ee5\u57fa\u672c\u5757\u4e3a\u5355\u4f4d\u8fdb\u884c\u4ee3\u7801\u5206\u6790
\u53ef\u4ee5\u63d0\u53d6<\/p>\n\n\n\n
>>> block = proj.factory.block(proj.entry) # \u63d0\u53d6\u7a0b\u5e8f\u5165\u53e3\u7684\u4e00\u6bb5\u4ee3\u7801\n<Block for 0x401670, 42 bytes>\n\n>>> block.pp() # pretty-print\u6253\u5370\u53cd\u6c47\u7f16\n0x401670: xor ebp, ebp\n0x401672: mov r9, rdx\n0x401675: pop rsi\n0x401676: mov rdx, rsp\n0x401679: and rsp, 0xfffffffffffffff0\n0x40167d: push rax\n0x40167e: push rsp\n0x40167f: lea r8, [rip + 0x2e2a]\n0x401686: lea rcx, [rip + 0x2db3]\n0x40168d: lea rdi, [rip - 0xd4]\n0x401694: call qword ptr [rip + 0x205866]\n\n>>> block.instructions # \u6709\u591a\u5c11\u6307\u4ee4\uff1f\n0xb\n>>> block.instruction_addrs # \u6bcf\u6761\u6307\u4ee4\u7684\u5730\u5740\uff1f\n[0x401670, 0x401672, 0x401675, 0x401676, 0x401679, 0x40167d, 0x40167e, 0x40167f, 0x401686, 0x40168d, 0x401694]<\/code><\/pre>\n\n\n\n\u6216\u8005\u4ee3\u7801\u5757\u7684\u5176\u4ed6\u8868\u793a\u5f62\u5f0f<\/p>\n\n\n\n
>>> block.capstone # capstone disassembly\n<CapstoneBlock for 0x401670>\n>>> block.vex # VEX IRSB (\u8fd9\u662f\u4e00\u4e2apython\u5185\u90e8\u5730\u5740\uff0c\u800c\u4e0d\u662f\u7a0b\u5e8f\u5730\u5740)\n<pyvex.block.IRSB at 0x7706330><\/code><\/pre>\n\n\n\nstates<\/h4>\n\n\n\n
project\u5bf9\u8c61\u53ea\u8868\u793a\u7a0b\u5e8f\u7684\u4e00\u4e2a\u521d\u59cb\u955c\u50cf\uff08\u7406\u89e3\u4e3a\u5feb\u7167\u6216\u8005\u5b58\u6863\uff09\uff0cangr\u5206\u6790\u65f6\uff0c\u662f\u901a\u8fc7\u8868\u793asimulated program state\u7684\u7279\u6b8a\u5bf9\u8c61simstate\u8fdb\u884c\u5de5\u4f5c\u7684<\/p>\n\n\n\n
>>> state = proj.factory.entry_state()\n<SimState @ 0x401670><\/code><\/pre>\n\n\n\nsimstate\u5305\u62ec\u7a0b\u5e8f\u7684\u5185\u5b58\uff0c\u5bc4\u5b58\u5668\uff0c\u6587\u4ef6\u7cfb\u7edf\u6570\u636e\uff0c\u7ea6\u675f\u6761\u4ef6\uff0c\u53ef\u4ee5\u5f53\u4f5c\u5728\u4fdd\u5b58\u4e00\u4e2a\u52a8\u6001\u7684\u72b6\u6001
\u4f7f\u7528state.regs\u548cstate.mem\u6765\u8bbf\u95eestate\u7684\u5bc4\u5b58\u5668\u548c\u5185\u5b58<\/p>\n\n\n\n
>>> state.regs.rip # \u83b7\u53d6\u5f53\u524d\u6307\u4ee4\u6307\u9488\n<BV64 0x401670>\n>>> state.regs.rax\n<BV64 0x1c> #BV\uff0c\u4f4d\u5411\u91cfbitvector\u300264\u4f4d\uff0c\u8fdb\u5236\u76841c \n>>> state.mem[proj.entry].int.resolved # \u5c06\u5165\u53e3\u70b9\u7684\u5185\u5b58\u89e3\u91ca\u4e3aC int\n<BV32 0x8949ed31><\/code><\/pre>\n\n\n\n\u8fd9\u4e9b\u4e0d\u662fpython\u7684int\uff0c\u800c\u662fbitvectors\uff08cpu\u7684\u6570\uff09\uff0c\u5bf9\u6bd4\u5c31\u662f\uff0c\u5bc4\u5b58\u5668\u53ea\u670964bit\uff0c\u4f1a\u6709\u6574\u6570\u6ea2\u51fa\u7684\u60c5\u51b5\uff0c\u53ef\u4ee5\u662f\u786e\u5b9a\u503c\uff0c\u4e5f\u53ef\u4ee5\u662f\u4ee3\u6570\u7b26\u53f7\uff0c\u56e0\u4e3aangr\u7684\u884c\u4e3a\u903b\u8f91\u5728\u6a21\u62dfcpu\u7535\u8def\uff0c\u4e0d\u662f\u5728\u6309\u4eba\u7c7b\u903b\u8f91\u6765<\/p>\n\n\n\n
\n- python int\u8f6cbv\u518d\u56de\u53bb<\/li>\n<\/ul>\n\n\n\n
>>> bv = state.solver.BVV(0x1234, 32) # create a 32-bit-wide bitvector with value 0x1234\n<BV32 0x1234> # BVV stands for bitvector value\n>>> state.solver.eval(bv) # convert to python int\n0x1234<\/code><\/pre>\n\n\n\nbv\u5b58\u50a8\u56de\u5bc4\u5b58\u5668\u548c\u5185\u5b58\uff0c\u4e5f\u53ef\u4ee5\u00b7\u5b58\u50a8py int\uff0c\u4f1a\u88ab\u8f6c\u6362\u4e3a\u9002\u5f53\u5927\u5c0f\u7684bv<\/p>\n\n\n\n
>>> state.regs.rsi = state.solver.BVV(3, 64)\n>>> state.regs.rsi\n<BV64 0x3>\n\n>>> state.mem[0x1000].long = 4\n>>> state.mem[0x1000].long.resolved\n<BV64 0x4><\/code><\/pre>\n\n\n\nmem\u7528\u4e86\u4e00\u4e9bpython\u7684\u8bed\u6cd5\u7cd6\uff0c\u4f7f\u7528\u7b80\u5355\u7528\u6cd5<\/p>\n\n\n\n
\n- \u4f7f\u7528array[index]\u8868\u793a\u6307\u5b9a\u5730\u5740<\/li>\n\n\n\n
- \u4f7f\u7528\u6307\u5b9a\u5185\u5b58\u5e94\u89e3\u91ca\u4e3a<\u6570\u636e\u7c7b\u578b>\uff0c\u5e38\u7528\u503c\uff1achar\uff0cshort\uff0cint\uff0clong\uff0csize_t\uff0cuint8_t\uff0cuint16_t<\/li>\n\n\n\n
- \u4e5f\u53ef\u4ee5\u8bbe\u7f6e\u5b83\u7684\u503c\uff0c\u53ef\u4ee5\u662fbitvector\u6216python int<\/li>\n\n\n\n
- \u4f7f\u7528.resolved\u6309bv\u6765\u8bfb\u53d6\u503c<\/li>\n\n\n\n
- \u4f7f\u7528.concrete\u6309py int\u6765
\u8bfb\u53d6\u5176\u4ed6\u5bc4\u5b58\u5668\u53ef\u80fd\u4f1a\u9047\u5230<\/li>\n<\/ul>\n\n\n\n>>> state.regs.rdi\n<BV64 reg_48_11_64{UNINITIALIZED}><\/code><\/pre>\n\n\n\n64\u4f4dbv\uff0c\u4e0d\u5305\u542b\u6570\u503c\uff0c\u8fd9\u662f\u7b26\u53f7\u53d8\u91cf\uff0c\u7b26\u53f7\u6267\u884c\u7684\u57fa\u672c<\/p>\n\n\n\n
\u6a21\u62df\u7ba1\u7406\u5668\uff08SimGr\uff09<\/h4>\n\n\n\n
\u6a21\u62df\u7ba1\u7406\u5668\uff08Simulation Managers\uff09\u662fangr\u6700\u91cd\u8981\u7684\u63a7\u5236\u63a5\u53e3\uff0c\u5b83\u5141\u8bb8\u540c\u65f6\u5bf9\u5404\u7ec4\u72b6\u6001\u7684\u7b26\u53f7\u6267\u884c\u8fdb\u884c\u63a7\u5236\uff0c\u540c\u65f6\u5e94\u7528\u641c\u7d22\u7b56\u7565\u6765\u63a2\u7d22\u7a0b\u5e8f\u7684\u72b6\u6001\u7a7a\u95f4\u3002states \u88ab\u6574\u7406\u5230stashes\u91cc\uff0c\u4ece\u800c\u8fdb\u884c\u5404\u79cd\u64cd\u4f5c\u3002
state\u8868\u793a\u4e00\u4e2a\u6307\u5b9a\u65f6\u95f4\u7684\u7a0b\u5e8f\u8fd0\u884c\u72b6\u6001\uff0c\u9700\u8981\u4e00\u79cd\u65b9\u6cd5\u5c06\u5b83\u4f20\u7ed9next
simulation manager\u53ef\u4ee5\u5305\u542b\u591a\u4e2astash<\/em>\u72b6\u6001\u5c06\u4e0d\u540cstate\u653e\u5728\u4e0d\u540cstash\u91cc\u9762
\u5982<\/p>\n\n\n\n\n- \u653e\u8fdbactive\u6876simgr = proj.factory.simulation_manager(state)
\u6ce8\uff1a\u9ed8\u8ba4\u7684stash\u662factive<\/li>\n\n\n\n - deadended\uff1a\u8dd1\u5b8c\u7ed3\u675f\u7684<\/li>\n\n\n\n
- found\uff1a\u627e\u5230\u76ee\u6807\u5982\u540e\u95e8<\/li>\n\n\n\n
- pruned: \u542f\u7528LAZY_SOLVES\u65f6\uff0c\u7ecf\u56de\u6eaf\u786e\u8ba4\u4e3a\u4e0d\u53ef\u6ee1\u8db3\u800c\u88ab\u526a\u9664\u7684state<\/li>\n\n\n\n
- unconstrained: \u542f\u7528save_unconstrained\u65f6\uff0c\u4fdd\u5b58\u6307\u4ee4\u6307\u9488\u53d7\u63a7\u6216\u65e0\u7ea6\u675f\u7684state<\/li>\n\n\n\n
- unsat: \u542f\u7528save_unsat\u65f6\uff0c\u4fdd\u5b58\u56e0\u7ea6\u675f\u51b2\u7a81\u5bfc\u81f4\u4e0d\u53ef\u6ee1\u8db3\u7684state
\u53e6\u5916\u8fd8\u6709\u4e00\u4e2a\u53eb\u505aerrore \u7684\u5217\u8868\uff0c\u5b83\u4e0d\u662f\u4e00\u4e2astash\u3002\u5982\u679cstate\u5728\u6267\u884c\u8fc7\u7a0b\u4e2d\u53d1\u751f\u9519\u8bef\uff0c\u5219\u8be5state\u4f1a\u88ab\u5305\u88c5\u5728\u4e00\u4e2aErrorRecord\u5bf9\u8c61\u4e2d\uff0c\u8be5\u5bf9\u8c61\u5305\u542bstate\u548c\u5f15\u53d1\u7684\u9519\u8bef\uff0c\u7136\u540e\u8fd9\u4e2a\u5bf9\u8c61\u88ab\u63d2\u5165\u5230errored\u4e2d
\u9996\u5148\uff0c\u521b\u5efa\u4e00\u4e2asimulation manager\u3002\u6784\u9020\u51fd\u6570\u53ef\u4ee5\u4f20\u5165\u4e00\u4e2astate\u6216\u4e00\u4e2astate\u7684\u5217\u8868\u3002<\/li>\n<\/ul>\n\n\n\n>>> simgr = proj.factory.simulation_manager(state)\n<SimulationManager with 1 active>\n>>> simgr.active\n[<SimState @ 0x401670>]<\/code><\/pre>\n\n\n\n\u6267\u884c<\/p>\n\n\n\n
>>> simgr.step()<\/code><\/pre>\n\n\n\nsimstate\u5bf9\u8c61\u6267\u884c\u4e2d\u662f\u4e0d\u53ef\u53d8\u7684\uff0c\u53ef\u4ee5\u5b89\u5168\u7684\u5728\u591a\u8f6e\u6267\u884c\u4e2d\u4f7f\u7528\u5355\u4e2astate<\/p>\n\n\n\n
>>> simgr.active\n[<SimState @ 0x1020300>]\n>>> simgr.active[0].regs.rip # new and exciting!\n<BV64 0x1020300>\n>>> state.regs.rip # \u4f9d\u7136\u548c\u4e4b\u524d\u76f8\u540c\n<BV64 0x401670><\/code><\/pre>\n\n\n\n\u4ee5\u4e00\u4e2a\u6709\u4e09\u6761\u8def\u5f84\u7684\u7a0b\u5e8f\u4e3e\u4f8b<\/p>\n\n\n\n
#include <stdio.h>\n#include <stdlib.h>\n\nint main() {\n int num = 0;\n scanf(\"%d\", &num);\n\n if (num > 50) {\n if (num <= 100) {\n printf(\"50 < num <= 100\\n\");\n } else {\n printf(\"100 < num\\n\");\n exit(1);\n }\n } else {\n printf(\"num <= 50\\n\");\n }\n}\n\/\/ gcc example.c<\/code><\/pre>\n\n\n\n\u6a21\u62df\u7ba1\u7406\u5668\u6700\u57fa\u672c\u7684\u529f\u80fd\u662f\u5c06\u4e00\u4e2astash\u91cc\u6240\u6709\u7684states\u5411\u524d\u63a8\u8fdb\u4e00\u4e2abasic block\uff0c\u5229\u7528.step()\u6765\u5b9e\u73b0\uff0c\u800c.run()\u65b9\u6cd5\u53ef\u4ee5\u76f4\u63a5\u6267\u884c\u5230\u7a0b\u5e8f\u7ed3\u675f<\/p>\n\n\n\n
>>> proj = angr.Project('a.out', auto_load_libs=False)\n>>> state = proj.factory.entry_state()\n>>> simgr = proj.factory.simgr(state) # \u521b\u5efa SimulationManager\n>>> simgr\n<SimulationManager with 1 active>\n>>> simgr.active # active stash\n[<SimState @ 0x400640>]\n\n>>> while len(simgr.active) == 1: # \u4e00\u76f4\u6267\u884c\u5230 active stash \u4e2d\u6709\u4e0d\u6b62\u4e00\u4e2a state\n... simgr.step()\n...\n<SimulationManager with 1 active>\n...\n<SimulationManager with 1 active>\n<SimulationManager with 2 active>\n>>> simgr.active # \u6709 2 \u4e2a active state\n[<SimState @ 0x40078f>, <SimState @ 0x400763>]\n\n>>> simgr.step() # \u540c\u65f6\u63a8\u8fdb 2 \u4e2a state\n<SimulationManager with 3 active>\n>>> simgr.active # \u5f97\u5230 3 \u4e2a state\n[<SimState @ 0x400600>, <SimState @ 0x40076b>, <SimState @ 0x400779>]\n\n>>> simgr.run() # \u4e00\u76f4\u6267\u884c\u5230\u7a0b\u5e8f\u7ed3\u675f\n<SimulationManager with 3 deadended>\n>>> simgr.deadended # deadended stash\n[<SimState @ 0x1000068>, <SimState @ 0x1000020>, <SimState @ 0x1000068>]<\/code><\/pre>\n\n\n\n\u4e8e\u662f\u6211\u4eec\u5f97\u5230\u4e86 3 \u4e2adeadended\u72b6\u6001\u7684state\u3002\u8fd9\u4e00\u72b6\u6001\u8868\u793a\u4e00\u4e2astate\u4e00\u76f4\u6267\u884c\u5230\u6ca1\u6709\u540e\u7ee7\u8005\u4e86\uff0c\u90a3\u4e48\u5c31\u5c06\u5b83\u4eceactive stash\u4e2d\u79fb\u9664\uff0c\u653e\u5230deadended stash\u4e2d
\u53ef\u4ee5\u4f7f\u7528.move()\uff0c\u5c06filter_func\u7b5b\u9009\u51fa\u6765\u7684state\u4ecefrom_stash\u79fb\u52a8\u5230to_stash<\/p>\n\n\n\n
>>> simgr.move(from_stash='deadended', to_stash='more_then_50', filter_func=lambda s: '100' in s.posix.dumps(1))\n<SimulationManager with 1 deadended, 2 more_then_50><\/code><\/pre>\n\n\n\n\u6bcf\u4e2astash\u90fd\u662f\u4e00\u4e2a\u5217\u8868\uff0c\u53ef\u4ee5\u7528\u5217\u8868\u7684\u64cd\u4f5c\u6765\u904d\u5386\u5b83\uff0c\u540c\u65f6angr\u4e5f\u63d0\u4f9b\u4e86\u4e00\u4e9b\u9ad8\u7ea7\u7684\u65b9\u6cd5\uff0c\u4f8b\u5982\u5728stash\u540d\u79f0\u524d\u9762\u52a0\u4e0aone_\uff0c\u8868\u793a\u8be5stash\u7684\u7b2c\u4e00\u4e2astate,\u5728\u540d\u79f0\u524d\u52a0\u4e0amp_\uff0c\u5c06\u5f97\u5230\u4e00\u4e2amulpyplexed\u7248\u672c\u7684stash<\/p>\n\n\n\n
>>> for s in simgr.deadended + simgr.more_then_50:\n... print hex(s.addr)\n...\n0x1000068L\n0x1000020L\n0x1000068L\n\n>>> simgr.one_more_then_50\n<SimState @ 0x1000020>\n>>> simgr.mp_more_then_50\nMP([<SimState @ 0x1000020>, <SimState @ 0x1000068>])\n>>> simgr.mp_more_then_50.posix.dumps(0)\nMP(['-2424202024@', '+0000000060\\x00'])<\/code><\/pre>\n\n\n\n\u6a21\u62df\u7ba1\u7406\u5668\u6240\u4f7f\u7528\u7684\u63a2\u7d22\u6280\u672f(exploration techniques)<\/h5>\n\n\n\n
\u9ed8\u8ba4\u7b56\u7565\u662f\u5e7f\u5ea6\u4f18\u5148\u641c\u7d22\uff0c\u4f46\u6839\u636e\u76ee\u6807\u7a0b\u5e8f\u6216\u8005\u9700\u8981\u8fbe\u5230\u7684\u76ee\u7684\u4e0d\u540c\uff0c\u6211\u4eec\u53ef\u80fd\u9700\u8981\u4f7f\u7528\u4e0d\u540c\u7684\u63a2\u7d22\u6280\u672f\uff0c\u901a\u8fc7\u8c03\u7528simgr.use_technique(tech)\u6765\u5b9e\u73b0\uff0c\u5176\u4e2dtech\u662f\u4e00\u4e2aExplorationTechnique\u5b50\u7c7b\u7684\u5b9e\u4f8b\u3002angr\u5185\u7f6e\u7684\u63a2\u7d22\u6280\u672f\u5728angr.exploration_techniques<\/p>\n\n\n\n
\n- Explorer\uff1a\u8be5\u6280\u672f\u5b9e\u73b0\u4e86.explore()\u529f\u80fd\uff0c\u5141\u8bb8\u5728\u63a2\u7d22\u65f6\u67e5\u627e\u6216\u907f\u514d\u67d0\u4e9b\u5730\u5740\u3002<\/li>\n\n\n\n
- DFS\uff1a\u6df1\u5ea6\u4f18\u5148\u641c\u7d22\uff0c\u6bcf\u6b21\u53ea\u63a2\u7d22\u4e00\u6761\u8def\u5f84\uff0c\u5176\u5b83\u8def\u5f84\u4f1a\u653e\u5230deferred stash\u4e2d\u3002\u76f4\u5230\u5f53\u524d\u8def\u5f84\u63a2\u7d22\u7ed3\u675f\uff0c\u518d\u4ecedeferred\u4e2d\u53d6\u51fa\u6700\u957f\u7684\u4e00\u6761\u7ee7\u7eed\u63a2\u7d22\u3002<\/li>\n\n\n\n
- LoopLimiter\uff1a\u9650\u5236\u8def\u5f84\u7684\u5faa\u73af\u6b21\u6570\uff0c\u8d85\u51fa\u9650\u5236\u7684\u8def\u5f84\u5c06\u88ab\u653e\u5230discard stash\u4e2d\u3002<\/li>\n\n\n\n
- LengthLimiter\uff1a\u9650\u5236\u8def\u5f84\u7684\u6700\u5927\u957f\u5ea6<\/li>\n\n\n\n
- ManualMergepoint\uff1a\u5c06\u7a0b\u5e8f\u4e2d\u7684\u67d0\u4e2a\u5730\u5740\u6807\u8bb0\u4e3a\u5408\u5e76\u70b9\uff0c\u5c06\u5728\u4e00\u5b9a\u65f6\u95f4\u8303\u56f4\u5185\u5230\u8fbe\u7684\u6240\u6709state\u5408\u5e76\u5728\u4e00\u8d77\u3002<\/li>\n\n\n\n
- Veritesting\uff1a\u8bd5\u56fe\u8bc6\u522b\u51fa\u6709\u7528\u7684\u5408\u5e76\u70b9\u6765\u89e3\u51b3\u8def\u5f84\u7206\u70b8\u95ee\u9898\u3002\u5728\u521b\u5efaSimulationManager\u65f6\u901a\u8fc7veritesting=True\u6765\u5f00\u542f\u3002<\/li>\n\n\n\n
- Tracer\uff1a\u8bb0\u5f55\u5728\u67d0\u4e2a\u5177\u4f53\u8f93\u5165\u4e0b\u7684\u6267\u884c\u8def\u5f84\uff0c\u7ed3\u679c\u662f\u6267\u884c\u5b8c\u6700\u540e\u4e00\u4e2abasic block\u7684state\uff0c\u5b58\u653e\u5728traced stash\u4e2d\u3002<\/li>\n\n\n\n
- Oppologist\uff1a\u5f53\u9047\u5230\u67d0\u4e2a\u4e0d\u652f\u6301\u7684\u6307\u4ee4\u65f6\uff0c\u5b83\u5c06\u5177\u4f53\u5316\u8be5\u6307\u4ee4\u7684\u6240\u6709\u8f93\u5165\u5e76\u4f7f\u7528unicorn engine\u7ee7\u7eed\u6267\u884c\u3002<\/li>\n\n\n\n
- Threading\uff1a\u5c06\u7ebf\u7a0b\u7ea7\u5e76\u884c\u6dfb\u52a0\u5230\u63a2\u7d22\u8fc7\u7a0b\u4e2d\u3002<\/li>\n\n\n\n
- Spiller\uff1a\u5f53\u5904\u4e8eactive\u7684state\u8fc7\u591a\u65f6\uff0c\u5c06\u5176\u4e2d\u4e00\u4e9b\u8f6c\u5b58\u5230\u78c1\u76d8\u4e0a\u4ee5\u4fdd\u6301\u8f83\u4f4e\u7684\u5185\u5b58\u6d88\u8017\u3002<\/li>\n<\/ul>\n\n\n\n
\u5206\u6790<\/h4>\n\n\n\n
angr\u9884\u5148\u6253\u5305\u4e86\u51e0\u4e2a\u5185\u7f6e\u5206\u6790\uff0c\u53ef\u4ee5\u4f7f\u7528\u6765\u63d0\u53d6\u4e00\u4e9b\u4fe1\u606f,\u6709\u8fd9\u4e9b<\/p>\n\n\n\n
>>> proj.analyses. # Press TAB here in ipython to get an autocomplete-listing of everything:\n proj.analyses.BackwardSlice proj.analyses.CongruencyCheck proj.analyses.reload_analyses \n proj.analyses.BinaryOptimizer proj.analyses.DDG proj.analyses.StaticHooker \n proj.analyses.BinDiff proj.analyses.DFG proj.analyses.VariableRecovery \n proj.analyses.BoyScout proj.analyses.Disassembly proj.analyses.VariableRecoveryFast \n proj.analyses.CDG proj.analyses.GirlScout proj.analyses.Veritesting \n proj.analyses.CFG proj.analyses.Identifier proj.analyses.VFG \n proj.analyses.CFGEmulated proj.analyses.LoopFinder proj.analyses.VSA_DDG \n proj.analyses.CFGFast proj.analyses.Reassembler<\/code><\/pre>\n\n\n\nCFGfast\uff1a\u9759\u6001\u5206\u6790\u3001\u9012\u5f52\u53cd\u6c47\u7f16\uff0c\u4e0d\u8fd0\u884c\u4ee3\u7801\uff0c\u8bb0\u5f55call\u548cjmp\u8fd9\u4e9b\uff0c\u4f46\u95f4\u63a5\u8df3\u8f6c\u4e0d\u7cbe\u51c6
CFGEmulated\uff1a\u4eff\u771f\u63a7\u5236\u6d41\u56fe\uff0c\u52a8\u6001\u5206\u6790\u3001\u6a21\u62df\u6267\u884c\uff0c\u8dd1\u4ee3\u7801\uff0c\u4f46\u6709\u70b9\u6162
\u6784\u5efa\u548c\u4f7f\u7528\u5feb\u901f\u63a7\u5236\u6d41\u56fe\uff08CFGfast\uff09<\/p>\n\n\n\n
# \u672c\u6765\uff0c\u5f53\u6211\u4eec\u52a0\u8f7d\u8fd9\u4e2a\u4e8c\u8fdb\u5236\u6587\u4ef6\u65f6\uff0c\u5b83\u8fd8\u5c06\u6240\u6709\u4f9d\u8d56\u9879\u52a0\u8f7d\u5230\u540c\u4e00\u4e2a\u865a\u62df\u5730\u5740\u7a7a\u95f4\u4e2d\n# \u5927\u591a\u6570\u5206\u6790\u662f\u4e0d\u9700\u8981\u7684\uff0c\u6240\u4ee5\u6307\u5b9aauto_load_libs=false\n>>> proj = angr.Project('\/bin\/true', auto_load_libs=False)\n>>> cfg = proj.analyses.CFGFast()\n<CFGFast Analysis Result at 0x2d85130>\n\n# cfg.graph\u8fd4\u56de\u7684\u662f\u4e00\u4e2anetworkx DiGraph\u5bf9\u8c61\n# networkX\uff08python\u56fe\u8bba\u7b97\u6cd5\u5e93\uff09\n>>> cfg.graph\n<networkx.classes.digraph.DiGraph at 0x2da43a0>\n>>> len(cfg.graph.nodes())\n951\n\n# \u4f7f\u7528cfg.get_any_node\u83b7\u53d6\u7ed9\u5b9a\u5730\u5740\u7684CFGNode\n>>> entry_node = cfg.get_any_node(proj.entry)\n>>> len(list(cfg.graph.successors(entry_node)))\n2<\/code><\/pre>\n\n\n\n\u52a0\u8f7d\u4e8c\u8fdb\u5236\u6587\u4ef6\uff08CLE and angr Projects\uff09<\/h2>\n\n\n\n\u52a0\u8f7d\u5668<\/h3>\n\n\n\n
\u91cd\u65b0\u52a0\u8f7dbin\/true\u6765\u4e86\u89e3\u600e\u4e48\u548c\u52a0\u8f7d\u5668\u8fdb\u884c\u4ea4\u4e92<\/p>\n\n\n\n
>>> import angr, monkeyhex\n>>> proj = angr.Project('\/bin\/true')\n>>> proj.loader\n<Loaded true, maps [0x400000:0x5008000]><\/code><\/pre>\n\n\n\nLoaded Objects<\/h4>\n\n\n\n
CLE\u52a0\u8f7d\u5668(cle.Loader),\u4ee3\u8868\u6574\u4e2a\u52a0\u8f7d\u7684\u4e8c\u8fdb\u5236\u5bf9\u8c61\uff0c\u52a0\u8f7d\u6620\u5c04\u5230\u4e00\u4e2a\u5355\u72ec\u7684\u5185\u5b58\u7a7a\u95f4\u3002 \u6bcf\u4e2a\u4e8c\u8fdb\u5236\u5bf9\u8c61\u88ab\u80fd\u591f\u5904\u7406\u5b83\u8fd9\u79cd\u6587\u4ef6\u7c7b\u578b\u7684\u52a0\u8f7d\u5668\u540e\u7aef\u52a0\u8f7d,cle.ELF\u7528\u6765\u52a0\u8f7dELF\u4e8c\u8fdb\u5236\u6587\u4ef6\u7684\u3002
\u5185\u5b58\u4e2d\u4e5f\u6709\u4e0d\u4ee3\u8868\u4efb\u4f55\u52a0\u8f7d\u7684\u4e8c\u8fdb\u5236\u6587\u4ef6\u7684\u5bf9\u8c61\u3002\u6bd4\u5982\uff0c\u63d0\u4f9b\u672c\u5730\u7ebf\u7a0b\u5b58\u50a8\u652f\u6301\u7684\u5bf9\u8c61\uff0c\u63d0\u4f9b\u672a\u89e3\u6790\u7b26\u53f7\u652f\u6301\u7684\u6269\u5c55\u5bf9\u8c61\u3002
\u53ef\u4ee5\u7528loader.all_objects\u83b7\u53d6\u5230CLE\u52a0\u8f7d\u7684\u5bf9\u8c61\u7684\u5b8c\u6574\u5217\u8868\uff0c\u4ee5\u53ca\u51e0\u4e2a\u66f4\u6709\u9488\u5bf9\u6027\u7684\u5206\u7c7b<\/p>\n\n\n\n
# \u6240\u6709\u52a0\u8f7d\u7684\u5bf9\u8c61\n>>> proj.loader.all_objects\n[<ELF Object fauxware, maps [0x400000:0x60105f]>,\n <ELF Object libc.so.6, maps [0x1000000:0x13c42bf]>,\n <ELF Object ld-linux-x86-64.so.2, maps [0x2000000:0x22241c7]>,\n <ELFTLSObject Object cle##tls, maps [0x3000000:0x300d010]>,\n <KernelObject Object cle##kernel, maps [0x4000000:0x4008000]>,\n <ExternObject Object cle##externs, maps [0x5000000:0x5008000]>\n\n# \u8fd9\u662f\u201c\u4e3b\u201d\u5bf9\u8c61\uff0c\u662f\u4f60\u5728\u52a0\u8f7d\u9879\u76ee\u65f6\u76f4\u63a5\u6307\u5b9a\u7684\u5bf9\u8c61\n>>> proj.loader.main_object\n<ELF Object true, maps [0x400000:0x60105f]>\n\n# \u8fd9\u662f\u4ece\u5171\u4eab\u5bf9\u8c61\u540d\u79f0\u5230\u5bf9\u8c61\u7684\u5b57\u5178\u6620\u5c04\n>>> proj.loader.shared_objects\n{ 'libc.so.6': <ELF Object libc.so.6, maps [0x1000000:0x13c42bf]>\n 'ld-linux-x86-64.so.2': <ELF Object ld-linux-x86-64.so.2, maps [0x2000000:0x22241c7]>}\n\n# \u8fd9\u662f\u6240\u6709\u4eceELF\u6587\u4ef6\u52a0\u8f7d\u7684\u5bf9\u8c61\n# \u5982\u679c\u662fwindows\u7a0b\u5e8f\u4f7f\u7528all_pe_objects!\n>>> proj.loader.all_elf_objects\n[<ELF Object true, maps [0x400000:0x60105f]>,\n <ELF Object libc.so.6, maps [0x1000000:0x13c42bf]>,\n <ELF Object ld-linux-x86-64.so.2, maps [0x2000000:0x22241c7]>]\n\n# \u8fd9\u662f\u201c\u6269\u5c55\u5bf9\u8c61\u201d\uff0c\u6211\u4eec\u7528\u5b83\u6765\u4e3a\u672a\u89e3\u6790\u7684\u5bfc\u5165\u548cangr\u5185\u90e8\u63d0\u4f9b\u5730\u5740\n>>> proj.loader.extern_object\n<ExternObject Object cle##externs, maps [0x5000000:0x5008000]>\n\n# \u6b64\u5bf9\u8c61\u7528\u4e8e\u4e3a\u6a21\u62df\u7684\u7cfb\u7edf\u8c03\u7528\u63d0\u4f9b\u5730\u5740\n>>> proj.loader.kernel_object\n<KernelObject Object cle##kernel, maps [0x4000000:0x4008000]>\n\n# \u6700\u540e\uff0c\u4f60\u53ef\u4ee5\u83b7\u5f97\u5bf9\u7ed9\u5b9a\u5730\u5740\u7684\u5bf9\u8c61\u7684\u5f15\u7528\n>>> proj.loader.find_object_containing(0x400000)\n<ELF Object true, maps [0x400000:0x60105f]><\/code><\/pre>\n\n\n\n\u7b26\u53f7\u548c\u91cd\u5b9a\u4f4d<\/h3>\n\n\n\n
\u53ef\u4ee5\u5728\u4f7f\u7528CLE\u65f6\u4f7f\u7528\u7b26\u53f7
\u7b26\u53f7\u662f\u628a\u8ba1\u7b97\u673a\u5730\u5740\u548c\u51fd\u6570\u547d\u540d\u5bf9\u5e94\u8d77\u6765\u7684\u6620\u5c04\u5173\u7cfb
\u4ececle\u4e2d\u83b7\u53d6\u7b26\u53f7\u7684\u6700\u7b80\u5355\u65b9\u6cd5\u662f\u4f7f\u7528loader.find_symbol\uff0c\u5b83\u63a5\u6536\u540d\u79f0\u6216\u5730\u5740\u5e76\u8fd4\u56deSymbol\u5bf9\u8c61<\/p>\n\n\n\n
# \u7b26\u53f7\u67e5\u627e\n>>> malloc = proj.loader.find_symbol('malloc')\n>>> malloc\n<Symbol \"malloc\" in libc.so.6 at 0x1054400><\/code><\/pre>\n\n\n\n\u4ee3\u7801\u4e2d\u7684proj.loader\u5176\u5b9e\u5c31\u662fCLE\uff0c\u8d1f\u8d23\u5728angr\u52a0\u8f7d\u7a0b\u5e8f\u65f6\u5c06\u4e3b\u7a0b\u5e8f\u8bfb\u5165\u5185\u5b58\uff0c\u5f53\u53d1\u73b0\u7a0b\u5e8f\u9700\u8981\u7528\u5230libc.so.6\uff08c\u8bed\u8a00\u6807\u51c6\u5e93\u65f6\uff09\uff0c\u81ea\u52a8\u5c06\u5e93\u642c\u8fdb\u5185\u5b58
\u7f16\u8bd1\u7a0b\u5e8f\u7684\u65f6\u5019\uff0c\u7f16\u8bd1\u5668\u5e76\u4e0d\u77e5\u9053malloc\u5728\u54ea\uff0c\u6240\u4ee5\u7f16\u8bd1\u5668\u5728\u4ee3\u7801\u91cc\u7559\u4e86\u4e2a\u7a7a\uff0c\u6216\u8005\u4e00\u4e2a\u5360\u4f4d\u7b26\uff0c\u91cd\u5b9a\u4f4d\u5c31\u662f\u7a0b\u5e8f\u542f\u52a8\u65f6\uff0c\u5c06libc.so.6\u52a0\u8f7d\u8fdb\u6765\uff0c\u786e\u5b9a\u4e86malloc\u7684\u771f\u5b9e\u5730\u5740\uff0c\u56de\u5934\u5c06\u7a0b\u5e8f\u6240\u6709\u7559\u7a7a\u7684\u5730\u65b9\u586b\u4e0a\u8fd9\u4e2a\u5730\u5740
\u7b26\u53f7\u6700\u6709\u7528\u7684\u5c5e\u6027\u662f\u5b83\u7684\u540d\u79f0\uff0c\u6240\u6709\u8005\u548c\u5730\u5740\uff0c\u4f46\u7b26\u53f7\u7684\u5730\u5740\u53ef\u80fd\u662f\u4e0d\u660e\u786e\u7684\uff0csymbol\u5bf9\u8c61\u6709\u4e09\u79cd\u83b7\u53d6\u5176\u5730\u5740\u7684\u65b9\u5f0f<\/p>\n\n\n\n
\n- .rebased_addr\u662f\u5b83\u5728\u5168\u5c40\u5730\u5740\u7a7a\u95f4\u7684\u5730\u5740\u3002\u8fd9\u662f\u6253\u5370\u8f93\u51fa\u663e\u793a\u7684\u5185\u5bb9<\/li>\n\n\n\n
- .linked_addr\u662f\u76f8\u5bf9\u4e8e\u4e8c\u8fdb\u5236\u7684\u9884\u94fe\u63a5\u57fa\u5740\u7684\u5730\u5740\u3002\u8fd9\u662f\u4f8b\u5982readelf(1)\u83b7\u53d6\u5230\u7684\u5730\u5740<\/li>\n\n\n\n
- .relative_addr\u662f\u5b83\u76f8\u5bf9\u4e8e\u5bf9\u8c61\u57fa\u5740\u7684\u5730\u5740\uff08\u5373RVA\uff0c\u76f8\u5bf9\u865a\u62df\u5730\u5740\uff09<\/li>\n<\/ul>\n\n\n\n
>>> malloc.name\n'malloc'\n\n>>> malloc.owner_obj\n<ELF Object libc.so.6, maps [0x1000000:0x13c42bf]>\n\n>>> malloc.rebased_addr\n0x1054400\n>>> malloc.linked_addr\n0x54400\n>>> malloc.relative_addr\n0x54400<\/code><\/pre>\n\n\n\n\u9664\u4e86\u63d0\u4f9b\u8c03\u8bd5\u4fe1\u606f\uff0c\u7b26\u53f7\u8fd8\u652f\u6301\u52a8\u6001\u94fe\u63a5\u6982\u5ff5
libc\u5728\u5bfc\u51fa\u7b26\u53f7\u63d0\u4f9bmalloc\uff0c\u4e3b\u4e8c\u8fdb\u5236\u6587\u4ef6\u4f9d\u8d56\u4e8e\u5b83\uff0c\u5982\u679c\u6211\u4eec\u8981\u6c42cle\u76f4\u63a5\u4ece\u4e3b\u5bf9\u8c61\u7ed9\u6211\u4eec\u4e00\u4e2amalloc\u7b26\u53f7\uff0c\u5b83\u4f1a\u544a\u8bc9\u6211\u4eec\u8fd9\u662f\u4e00\u4e2a\u5bfc\u5165\u7b26\u53f7\uff08\u5728\u5f53\u524d\u4e8c\u8fdb\u5236\u6587\u4ef6\uff08\u6a21\u5757\uff09\u5185\u90e8\u5b9a\u4e49\uff0c\u5e76\u4e14\u6807\u8bb0\u4e3a\u5141\u8bb8\u5176\u4ed6\u4e8c\u8fdb\u5236\u6a21\u5757\u8bbf\u95ee\u7684\u7b26\u53f7\uff0c\u5c31\u662f\u5728\u8bf4\uff0c\u8bb0\u4f4f\u8fd9\u4e2a\u4e1c\u897f\uff0c\u4e4b\u540e\u8981\u67e5\u627e\uff0c\u6307\u5411data\u6bb5\u6216\u8005text\u6bb5\uff0cangr\u5c5e\u6027is_export = True\u3002\u6ce8\uff1a\u7b26\u53f7\u6307\u5411\uff0c\u5c31\u662f\u7b26\u53f7\u8868\u7684\u8bb0\u5f55\uff0c\u5c06\u540d\u5b57\u6620\u5c04\u5230\u5185\u5b58\u5730\u5740<\/em>\u3002\uff09\u5bfc\u5165\u7b26\u53f7\u6ca1\u6709\u4e0e\u4e4b\u5173\u8054\u5730\u5740\uff0c\u63d0\u4f9b\u4e86\u7528\u4e8e\u89e3\u6790\u4ed6\u4eec\u7684\u7b26\u53f7\u7684\u5f15\u7528\uff0c\u6bd4\u5982.resolvedby,\u8fde\u63a5import\u5bfc\u5165\u548cexport\u5bfc\u51fa<\/p>\n\n\n\n>>> malloc.is_export\nTrue\n>>> malloc.is_import\nFalse\n\n# \u5728Loader\u4e0a\uff0c\u65b9\u6cd5\u662ffind_symbol\uff0c\u56e0\u4e3a\u5b83\u6267\u884c\u641c\u7d22\u64cd\u4f5c\u6765\u67e5\u627e\u7b26\u53f7\u3002\n# \u5728\u5355\u4e2a\u5bf9\u8c61\u4e0a\uff0c\u65b9\u6cd5\u662fget_symbol\uff0c\u56e0\u4e3a\u53ea\u80fd\u6709\u4e00\u4e2a\u5177\u6709\u7ed9\u5b9a\u540d\u79f0\u7684\u7b26\u53f7\u3002\n>>> main_malloc = proj.loader.main_object.get_symbol(\"malloc\")\n>>> main_malloc\n<Symbol \"malloc\" in true (import)>\n>>> main_malloc.is_export\nFalse\n>>> main_malloc.is_import\nTrue\n>>> main_malloc.resolvedby\n<Symbol \"malloc\" in libc.so.6 at 0x1054400><\/code><\/pre>\n\n\n\n\u5bfc\u5165\u548c\u5bfc\u51fa\u4e4b\u95f4\u7684\u94fe\u63a5\u5728\u5185\u5b58\u4e2d\u7684\u5177\u4f53\u6ce8\u518c\u65b9\u5f0f\u7531\u91cd\u5b9a\u4f4d\u6765\u5904\u7406\uff0c\u91cd\u5b9a\u4f4d\u8868\u793a\uff0c\u5f53\u4f60\u5c06\u5bfc\u5165\u4e0e\u5bfc\u51fa\u7b26\u53f7\u5339\u914d\u65f6\uff0c\u5728\u5bfc\u51fa\u5730\u5740\u5199\u5165[location]\uff0c\u683c\u5f0f\u4e3a[format].\u6211\u4eec\u53ef\u4ee5\u770b\u5230\u5bf9\u8c61(\u4f5c\u4e3arelocation\u5b9e\u4f8b)\u7684\u5b8c\u6574\u91cd\u5b9a\u4f4d\u5217\u8868obj.relocs\uff0c\u6216\u8005\u4ec5\u67e5\u770b\u4ece\u7b26\u53f7\u8868\u540d\u79f0\u5230\u91cd\u5b9a\u4f4d\u6620\u5c04obj.imports\uff0c\u5bfc\u51fa\u7b26\u53f7\u6ca1\u6709\u5bf9\u5e94\u5217\u8868
\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u65b9\u5f0f\u8bbf\u95ee\u91cd\u5b9a\u4f4d\u5bf9\u5e94\u7684\u5bfc\u5165\u7b26\u53f7\uff1a\u91cd\u5b9a\u4f4d\u5c06\u5199\u5165\u7684\u5730\u5740\u53ef\u4ee5\u901a\u8fc7\u53ef\u7528\u4e8eSymbol\u7684\u4efb\u4f55\u5730\u5740\u6807\u8bc6\u7b26\u8bbf\u95ee\uff0c\u4f60\u53ef\u4ee5\u901a\u8fc7\u8bbf\u95eerelocation.symbol\uff08\u5b58\u7740\u5bfc\u5165\u7b26\u53f7\uff09\u5c5e\u6027\u6765\u83b7\u53d6\u8fd9\u4e2a\u91cd\u5b9a\u4f4d\u8868\u5bf9\u5e94\u7684\u5bfc\u5165\u8868\u7b26\u53f7\uff0c\u5e76\u4e14\u4f60\u8fd8\u53ef\u4ee5\u901a\u8fc7.owner_obj\u5c5e\u6027\uff0c\u6765\u83b7\u53d6\u8bf7\u6c42\u8fd9\u6b21\u91cd\u5b9a\u4f4d\u7684\u5bf9\u8c61\u3002<\/p>\n\n\n\n
# \u91cd\u5b9a\u4f4d\u5bf9\u8c61\u6ca1\u6709\u5b9e\u73b0\u5f88\u597d\u7684\u683c\u5f0f\u5316\u8f93\u51fa\uff08pretty-printing\uff09\uff0c\u6240\u4ee5\uff08\u4f60\u770b\u5230\u7684\uff09\u90a3\u4e9b\u5730\u5740\u5176\u5b9e\u662f Python \u5185\u90e8\u5bf9\u8c61\u7684\u5730\u5740\uff0c\u4e0e\u6211\u4eec\u6b63\u5728\u5206\u6790\u7684\u7a0b\u5e8f\u6beb\u65e0\u5173\u7cfb\n>>> proj.loader.shared_objects['libc.so.6'].imports\n{u'__libc_enable_secure': <cle.backends.relocations.generic.GenericJumpslotReloc at 0x4221fb0>,\n u'__tls_get_addr': <cle.backends.relocations.generic.GenericJumpslotReloc at 0x425d150>,\n u'_dl_argv': <cle.backends.relocations.generic.GenericJumpslotReloc at 0x4254d90>,\n u'_dl_find_dso_for_object': <cle.backends.relocations.generic.GenericJumpslotReloc at 0x425d130>,\n u'_dl_starting_up': <cle.backends.relocations.generic.GenericJumpslotReloc at 0x42548d0>,\n u'_rtld_global': <cle.backends.relocations.generic.GenericJumpslotReloc at 0x4221e70>,\n u'_rtld_global_ro': <cle.backends.relocations.generic.GenericJumpslotReloc at 0x4254210>}<\/code><\/pre>\n\n\n\n\u5f53\u67d0\u4e2a\u5bfc\u5165\u7b26\u53f7\u65e0\u6cd5\u88ab\u89e3\u6790\uff08\u4f8b\u5982\u56e0\u4e3a\u627e\u4e0d\u5230\u5bf9\u5e94\u7684\u5171\u4eab\u5e93\uff09\u65f6\uff0cCLE \u4f1a\u81ea\u52a8\u66f4\u65b0externs\u5bf9\u8c61\uff08loader.extern_obj\uff09\u8ba9\u8fd9\u4e2a\u5bf9\u8c61\u6765\u9876\u66ff\uff0c\u58f0\u660e\u7531\u5b83\u6765\u5bfc\u51fa\u8fd9\u4e2a\u7b26\u53f7\uff0c\u9632\u6b62\u7a0b\u5e8f\u5206\u6790\u56e0\u4e3a\u7f3a\u6587\u4ef6\u800c\u5d29\u6e83<\/p>\n\n\n\n
\u52a0\u8f7d\u9009\u9879<\/h3>\n\n\n\n
\u5982\u679c\u4f60\u5728\u4f7f\u7528angr.Project\u52a0\u8f7d\u76ee\u6807\uff0c\u5e76\u4e14\u5e0c\u671b\u5411Project\u9690\u5f0f\u521b\u5efa\u7684cle.Loader\u5b9e\u4f8b\u4f20\u9012\u9009\u9879\uff0c\u4f60\u53ef\u4ee5\u76f4\u63a5\u5c06\u5173\u952e\u5b57\u53c2\u6570\u4f20\u9012\u7ed9Project\u7684\u6784\u9020\u51fd\u6570\uff0c\u8fd9\u4e9b\u53c2\u6570\u4f1a\u88ab\u8f6c\u53d1CLE\u3002<\/p>\n\n\n\n
\u57fa\u7840\u9009\u9879<\/h4>\n\n\n\n
auto_load_libs\uff1a\u7528\u4e8e\u542f\u7528\u6216\u7981\u7528 CLE \u5c1d\u8bd5\u81ea\u52a8\u89e3\u6790\u5171\u4eab\u5e93\u4f9d\u8d56\u7684\u529f\u80fd\uff0c\u9ed8\u8ba4\u60c5\u51b5\u4e0b\u662f\u5f00\u542f\u7684
except_missing_libs\uff1a\u4e0e\u4e4b\u76f8\u5bf9\u9009\u9879\uff0c\u5982\u679c\u8bbe\u7f6e\u4e3atrue\uff0c\u5f53\u4e8c\u8fdb\u5236\u6587\u4ef6\u5b58\u5728\u65e0\u6cd5\u89e3\u6790\u7684\u5171\u4eab\u5e93\u4f9d\u8d56\u65f6\uff0c\u5c06\u4f1a\u629b\u51fa\u5f02\u5e38
\u4f60\u53ef\u4ee5\u5411force_load_libs\u4f20\u9012\u4e00\u4e2a\u5b57\u7b26\u4e32\u5217\u8868\uff0c\u5217\u8868\u4e2d\u5217\u51fa\u7684\u4efb\u4f55\u5185\u5bb9\u90fd\u4f1a\u5728\u4e00\u5f00\u59cb\u5c31\u88ab\u89c6\u4e3a\u672a\u89e3\u6790\u7684\u5171\u4eab\u5e93\u4f9d\u8d56\u3002\u6216\u8005\uff0c\u4f60\u53ef\u4ee5\u5411skip_libs\u4f20\u9012\u4e00\u4e2a\u5b57\u7b26\u4e32\u5217\u8868\uff0c\u4ee5\u6b64\u6765\u963b\u6b62\u4efb\u4f55\u5339\u914d\u8be5\u540d\u79f0\u7684\u5e93\u88ab\u89e3\u6790\u4e3a\u4f9d\u8d56\u9879\u3002\u6b64\u5916\uff0c\u4f60\u8fd8\u53ef\u4ee5\u5411ld_path\u4f20\u9012\u4e00\u4e2a\u5b57\u7b26\u4e32\u5217\u8868\uff08\u6216\u5355\u4e2a\u5b57\u7b26\u4e32\uff09\uff0c\u5b83\u5c06\u4f5c\u4e3a\u5171\u4eab\u5e93\u7684\u989d\u5916\u641c\u7d22\u8def\u5f84\uff0c\u5e76\u4e14\u4f18\u5148\u7ea7\u9ad8\u4e8e\u4efb\u4f55\u9ed8\u8ba4\u8def\u5f84\uff08\u9ed8\u8ba4\u8def\u5f84\u5305\u62ec\uff1a\u52a0\u8f7d\u7a0b\u5e8f\u7684\u540c\u7ea7\u76ee\u5f55\u3001\u5f53\u524d\u5de5\u4f5c\u76ee\u5f55\u4ee5\u53ca\u4f60\u7684\u7cfb\u7edf\u5e93\u76ee\u5f55\uff09\u3002<\/p>\n\n\n\n
\u9488\u5bf9\u4e8c\u8fdb\u5236\u6587\u4ef6\u7684\u9009\u9879\uff08Per-Binary Options\uff09<\/h4>\n\n\n\n
\u5982\u679c\u4f60\u60f3\u6307\u5b9a\u4e00\u4e9b\u4ec5\u9002\u7528\u4e8e\u7279\u5b9a\u4e8c\u8fdb\u5236\u5bf9\u8c61\u7684\u9009\u9879\uff0cCLE\u4e5f\u5141\u8bb8\u4f60\u8fd9\u6837\u505a\u3002\u53c2\u6570main_opts\u548clib_opts\u901a\u8fc7\u63a5\u53d7\u9009\u9879\u5b57\u5178\u6765\u5b9e\u73b0\u8fd9\u4e00\u529f\u80fd\u3002main_opts\u662f\u4e00\u4e2a\u4ece\u9009\u9879\u540d\u5230\u9009\u9879\u503c\u7684\u6620\u5c04\uff0c\u800clib_opts\u662f\u4e00\u4e2a\u4ece\u5e93\u540d\u79f0\u5230\u201c\u9009\u9879\u540d\u4e0e\u503c\u7684\u6620\u5c04\u5b57\u5178\u201d\u7684\u6620\u5c04\u3002
\u53ef\u7528\u9009\u9879\u56e0\u540e\u7aef\u800c\u5f02\uff0c\u901a\u7528\u9009\u9879\u5305\u62ec<\/p>\n\n\n\n
\n- backend\uff1a\u8981\u4f7f\u7528\u7684\u540e\u7aef\uff08\u53ef\u4ee5\u662f\u7c7b\u6216\u540d\u79f0\uff09<\/li>\n\n\n\n
- base_addr\uff1a\u8981\u4f7f\u7528\u7684\u57fa\u5730\u5740<\/li>\n\n\n\n
- entry_point\uff1a\u8981\u4f7f\u7528\u7684\u5165\u53e3\u70b9<\/li>\n\n\n\n
- arch\uff1a\u8981\u4f7f\u7528\u7684\u67b6\u6784\u540d\u79f0<\/li>\n<\/ul>\n\n\n\n
angr.Project(main_opts={'backend': 'ida', 'arch': 'i386'}, lib_opts={'libc.so.6': {'backend': 'elf'}})<\/code><\/pre>\n\n\n\n\u540e\u7aef<\/h3>\n\n\n\n
CLE \u76ee\u524d\u62e5\u6709\u7528\u4e8e\u9759\u6001\u52a0\u8f7dELF\u3001PE\u3001CGC\u3001Mach-O\u548cELF core dump\uff08\u6838\u5fc3\u8f6c\u50a8\uff09\u6587\u4ef6\u7684\u540e\u7aef\uff0c\u540c\u65f6\u4e5f\u652f\u6301\u4f7f\u7528IDA\u52a0\u8f7d\u4e8c\u8fdb\u5236\u6587\u4ef6\uff0c\u4ee5\u53ca\u5c06\u6587\u4ef6\u52a0\u8f7d\u5230\u5e73\u5766\u5730\u5740\u7a7a\u95f4\uff08flat address space\uff09\u3002\u5728\u5927\u591a\u6570\u60c5\u51b5\u4e0b\uff0cCLE\u4f1a\u81ea\u52a8\u68c0\u6d4b\u5e76\u4f7f\u7528\u6b63\u786e\u7684\u540e\u7aef\uff0c\u6240\u4ee5\u9664\u975e\u4f60\u5728\u505a\u4e00\u4e9b\u975e\u5e38\u5947\u602a\u7684\u4e8b\u60c5\uff0c\u5426\u5219\u901a\u5e38\u4e0d\u9700\u8981\u6307\u5b9a\u4f7f\u7528\u54ea\u4e2a\u540e\u7aef\u3002
\u4f60\u53ef\u4ee5\u901a\u8fc7\u5728\u9009\u9879\u5b57\u5178\u4e2d\u5305\u542b\u4e00\u4e2a\u952e\u6765\u5f3a\u5236 CLE \u5bf9\u67d0\u4e2a\u5bf9\u8c61\u4f7f\u7528\u7279\u5b9a\u7684\u540e\u7aef,\u67d0\u4e9b\u540e\u7aef\u65e0\u6cd5\u81ea\u52a8\u68c0\u6d4b\u5e94\u8be5\u4f7f\u7528\u7684\u67b6\u6784\uff0c\u56e0\u6b64\u5fc5\u987b\u6307\u5b9aarch<\/p>\n\n\n\n\u540e\u7aef\u540d\u79f0<\/th> \u63cf\u8ff0<\/th> \u9700\u8981\u6307\u5b9a\u67b6\u6784?<\/th><\/tr><\/thead> elf<\/code><\/td>\u57fa\u4e8e PyELFTools \u7684 ELF \u6587\u4ef6\u9759\u6001\u52a0\u8f7d\u5668<\/td> \u5426<\/td><\/tr> pe<\/code><\/td>\u57fa\u4e8e PEFile \u7684 PE \u6587\u4ef6\u9759\u6001\u52a0\u8f7d\u5668<\/td> \u5426<\/td><\/tr> mach-o<\/code><\/td>Mach-O \u6587\u4ef6\u7684\u9759\u6001\u52a0\u8f7d\u5668\u3002\u4e0d\u652f\u6301\u52a8\u6001\u94fe\u63a5\u6216\u91cd\u57fa\uff08rebasing\uff09\u3002<\/td> \u5426<\/td><\/tr> cgc<\/code><\/td>Cyber Grand Challenge \u4e8c\u8fdb\u5236\u6587\u4ef6\u7684\u9759\u6001\u52a0\u8f7d\u5668<\/td> \u5426<\/td><\/tr> backedcgc<\/code><\/td>\u5141\u8bb8\u6307\u5b9a\u5185\u5b58\u548c\u5bc4\u5b58\u5668\u652f\u6301\u8005\uff08backers\uff09\u7684 CGC \u4e8c\u8fdb\u5236\u6587\u4ef6\u9759\u6001\u52a0\u8f7d\u5668<\/td> \u5426<\/td><\/tr> elfcore<\/code><\/td>ELF \u6838\u5fc3\u8f6c\u50a8\uff08core dumps\uff09\u7684\u9759\u6001\u52a0\u8f7d\u5668<\/td> \u5426<\/td><\/tr> ida<\/code><\/td>\u542f\u52a8\u4e00\u4e2a IDA \u5b9e\u4f8b\u6765\u89e3\u6790\u6587\u4ef6<\/td> \u662f<\/td><\/tr> blob<\/code><\/td>\u5c06\u6587\u4ef6\u4f5c\u4e3a\u5e73\u5766\u955c\u50cf\uff08flat image\uff09\u52a0\u8f7d\u5230\u5185\u5b58\u4e2d<\/td> \u662f<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n\u7b26\u53f7\u5316\u51fd\u6570\u6458\u8981\uff08Symbolic Function Summaries\uff09<\/h3>\n\n\n\n
\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0cproject\u4f1a\u5c1d\u8bd5\u4f7f\u7528\u88ab\u79f0\u4e3aSimProcedures\u7684\u7b26\u53f7\u5316\u6458\u8981\u6765\u66ff\u6362\u5bf9\u5e93\u51fd\u6570\u7684\u5916\u90e8\u8c03\u7528\uff08\u5b9e\u9645\u4e0a\u5c31\u662f\u6a21\u62df\u5e93\u51fd\u6570\u5bf9\u72b6\u6001\u4ea7\u751f\u5f71\u54cd\u7684Python\u51fd\u6570\uff09\u5df2\u7ecf\u5b9e\u73b0\u4e86\u5f88\u591a\u6b64\u7c7b\u51fd\u6570\u4f5c\u4e3aSimProcedures\uff0c\u5185\u7f6e\u8fc7\u7a0b\u53ef\u4ee5\u5728angr.SIM_PROCEDURES\u5b57\u5178\u4e2d\u627e\u5230
\u5b57\u5178\u7684\u7b2c\u4e00\u7ea7\u662f\u5305\u540d\uff0c\u7b2c\u4e8c\u7ea7\u662f\u5e93\u51fd\u6570\u540d\u79f0\uff0c\u6267\u884cSimProcedure\u800c\u4e0d\u662f\u4ece\u7cfb\u7edf\u4e2d\u52a0\u8f7d\u7684\u5b9e\u9645\u5e93\u51fd\u6570\uff0c\u4f1a\u8ba9\u5206\u6790\u53d8\u5f97\u66f4\u52a0\u6613\u4e8e\u5904\u7406\uff0c\u4ee3\u4ef7\u662f\u53ef\u80fd\u4f1a\u6709\u4e00\u4e9b\u4e0d\u51c6\u786e\u6027\u3002
\u5f53\u7ed9\u5b9a\u7684\u51fd\u6570\u6ca1\u6709\u53ef\u7528\u7684\u6458\u8981\u65f6\uff1a<\/p>\n\n\n\n
\n- \u5982\u679cauto_load_libs\u4e3aTrue\uff08\u8fd9\u662f\u9ed8\u8ba4\u503c\uff09\uff0c\u90a3\u4e48\u5c06\u6267\u884c\u771f\u6b63\u7684\u5e93\u51fd\u6570\u3002\u8fd9\u53ef\u80fd\u662f\u4f60\u60f3\u8981\u7684\uff0c\u4e5f\u53ef\u80fd\u4e0d\u662f\uff0c\u53d6\u51b3\u4e8e\u5177\u4f53\u7684\u51fd\u6570\u3002\u4f8b\u5982\uff0clibc\u4e2d\u7684\u67d0\u4e9b\u51fd\u6570\u5206\u6790\u8d77\u6765\u6781\u5176\u590d\u6742\uff0c\u5f88\u53ef\u80fd\u4f1a\u5bfc\u81f4\u5c1d\u8bd5\u6267\u884c\u5b83\u4eec\u7684\u8def\u5f84\u51fa\u73b0\u72b6\u6001\u6570\u91cf\u7206\u70b8<\/li>\n\n\n\n
- \u5982\u679cauto_load_libs\u4e3aFalse\uff0c\u90a3\u4e48\u5916\u90e8\u51fd\u6570\u5c06\u5904\u4e8e\u672a\u89e3\u6790\u72b6\u6001\uff0cProject\u4f1a\u5c06\u5b83\u4eec\u89e3\u6790\u4e3a\u4e00\u4e2a\u901a\u7528\u7684\u201c\u6869\uff08stub\uff09\u201d SimProcedure(ReturnUnconstrained),\u5c31\u662f\u6bcf\u6b21\u88ab\u8c03\u7528\u65f6\u90fd\u4f1a\u8fd4\u56de\u4e00\u4e2a\u552f\u4e00\u7684\u3001\u65e0\u7ea6\u675f\u7684\u7b26\u53f7\u503c<\/li>\n\n\n\n
- \u5982\u679cuse_sim_procedures\uff08\u8fd9\u662fangr.Project\u7684\u53c2\u6570\uff0c\u800c\u4e0d\u662fcle.Loader\u7684\u53c2\u6570\uff09\u4e3aFalse\uff08\u9ed8\u8ba4\u4e3aTrue\uff09\uff0c\u90a3\u4e48\u53ea\u6709\u7531extern\u5bf9\u8c61\u63d0\u4f9b\u7684\u7b26\u53f7\u4f1a\u88ab\u66ff\u6362\u4e3aSimProcedures\uff0c\u5e76\u4e14\u5b83\u4eec\u4f1a\u88ab\u66ff\u6362\u4e3aReturnUnconstrained\u6869\uff0c\u8be5\u6869\u9664\u4e86\u8fd4\u56de\u4e00\u4e2a\u7b26\u53f7\u503c\u5916\u4ec0\u4e48\u4e5f\u4e0d\u505a\u3002<\/li>\n\n\n\n
- \u4f60\u53ef\u4ee5\u901a\u8fc7angr.Project\u7684\u53c2\u6570exclude_sim_procedures_list\u548cexclude_sim_procedures_func\u6765\u6307\u5b9a\u67d0\u4e9b\u7279\u5b9a\u7684\u7b26\u53f7\u4e0d\u88abSimProcedures\u66ff\u6362
\u5177\u4f53\u7684\u7b97\u6cd5\u903b\u8f91\u53ef\u4ee5\u67e5\u770bangr.Project.-register_object\u7684\u4ee3\u7801<\/li>\n<\/ol>\n\n\n\nhook<\/h3>\n\n\n\n
angr\u7528Python\u6458\u8981\u66ff\u6362\u5e93\u4ee3\u7801\u7684\u673a\u5236\u79f0\u4e3aHooking.\u5728\u6267\u884c\u6a21\u62df\u65f6\uff0cangr\u4f1a\u5728\u6bcf\u4e00\u6b65\u68c0\u67e5\u5f53\u524d\u5730\u5740\u662f\u5426\u88abHook\u4e86\uff0c\u5982\u679c\u662f\uff0c\u5219\u8fd0\u884cHook\u4ee3\u7801\u800c\u4e0d\u662f\u8be5\u5730\u5740\u5904\u7684\u4e8c\u8fdb\u5236\u4ee3\u7801\u3002\u8ba9\u4f60\u5b9e\u73b0\u8fd9\u4e00\u70b9\u7684API\u662fproj.hook(addr,hook)\uff0c\u5176\u4e2dhook\u662f\u4e00\u4e2aSimProcedure\u5b9e\u4f8b\u3002\u4f60\u53ef\u4ee5\u901a\u8fc7 .is_hooked\u3001.unhook\u548c.hooked_by\u6765\u7ba1\u7406\u9879\u76ee\u7684Hook\u3002
\u8fd8\u6709\u4e00\u79cd\u66ff\u4ee3\u7684Hook\u5730\u5740\u7684API\uff0c\u5141\u8bb8\u4f60\u901a\u8fc7\u4f7f\u7528proj.hook(addr)\u4f5c\u4e3a\u51fd\u6570\u88c5\u9970\u5668\uff0c\u6765\u6307\u5b9a\u4f60\u81ea\u5df1\u7684\u4e34\u65f6\u7f16\u5199\u7684\u51fd\u6570\u4f5c\u4e3aHook\u3002\u5982\u679c\u4f60\u8fd9\u6837\u505a\uff0c\u4f60\u8fd8\u53ef\u4ee5\u9009\u62e9\u6307\u5b9a\u4e00\u4e2alength\u5173\u952e\u5b57\u53c2\u6570\uff0c\u4ee5\u4fbf\u5728\u4f60\u7684Hook\u5b8c\u6210\u540e\u8ba9\u6267\u884c\u5411\u524d\u8df3\u8fc7\u82e5\u5e72\u5b57\u8282\u3002<\/p>\n\n\n\n
>>> stub_func = angr.SIM_PROCEDURES['stubs']['ReturnUnconstrained'] # \u8fd9\u662f\u4e00\u4e2a\u7c7b(CLASS)\n>>> proj.hook(0x10000, stub_func()) # \u4f7f\u7528\u8be5\u7c7b\u7684\u4e00\u4e2a\u5b9e\u4f8b\u8fdb\u884c hook\n\n>>> proj.is_hooked(0x10000) # \u8fd9\u4e9b\u51fd\u6570\u5e94\u8be5\u662f\u975e\u5e38\u76f4\u89c2\u7684\nTrue\n>>> proj.unhook(0x10000)\n>>> proj.hooked_by(0x10000)\n<ReturnUnconstrained>\n\n>>> @proj.hook(0x20000, length=5)\n... def my_hook(state):\n... state.regs.rax = 1\n\n>>> proj.is_hooked(0x20000)\nTrue<\/code><\/pre>\n\n\n\n\u6b64\u5916\uff0c\u4f60\u53ef\u4ee5\u4f7f\u7528proj.hook_symbol(name,hook)\uff0c\u901a\u8fc7\u63d0\u4f9b\u7b26\u53f7\u540d\u79f0\u4f5c\u4e3a\u7b2c\u4e00\u4e2a\u53c2\u6570\uff0c\u6765Hook\u8be5\u7b26\u53f7\u6240\u5728\u7684\u5730\u5740\u3002\u8fd9\u6709\u4e00\u4e2a\u975e\u5e38\u91cd\u8981\u7684\u7528\u9014\uff0c\u5c31\u662f\u6269\u5c55angr\u5185\u7f6e\u5e93SimProcedures\u7684\u884c\u4e3a\u3002\u7531\u4e8e\u8fd9\u4e9b\u5e93\u51fd\u6570\u53ea\u662f\u7c7b\uff0c\u4f60\u53ef\u4ee5\u7ee7\u627f\u5b83\u4eec\uff0c\u91cd\u5199\u5b83\u4eec\u7684\u90e8\u5206\u884c\u4e3a\uff0c\u7136\u540e\u5c06\u4f60\u7684\u5b50\u7c7b\u7528\u4e8eHook\u3002<\/p>\n\n\n\n
\u6c42\u89e3\u5668\u5f15\u64ce<\/h2>\n\n\n\n
angr\u662f\u4e00\u4e2a\u7b26\u53f7\u6267\u884c\u5de5\u5177\uff0c\u5b83\u901a\u8fc7\u7b26\u53f7\u8868\u8fbe\u5f0f\u6765\u6a21\u62df\u7a0b\u5e8f\u7684\u6267\u884c\uff0c\u5c06\u7a0b\u5e8f\u7684\u8f93\u51fa\u8868\u793a\u6210\u5305\u542b\u8fd9\u4e9b\u7b26\u53f7\u7684\u903b\u8f91\u6216\u6570\u5b66\u8868\u8fbe\u5f0f\uff0c\u7136\u540e\u5229\u7528\u7ea6\u675f\u6c42\u89e3\u5668\u8fdb\u884c\u6c42\u89e3\u3002
bitvectors\u662f\u4e00\u4e2a\u6bd4\u7279\u4e32\uff0c\u524d\u9762\u770b\u5230\u4e86bitvectors\u505a\u7684\u4e00\u4e9b\u5177\u4f53\u7684\u6570\u5b66\u8fd0\u7b97\u3002\u4f46bitvectors \u4e0d\u4ec5\u53ef\u4ee5\u8868\u793a\u5177\u4f53\u7684\u6570\u503c\uff0c\u8fd8\u53ef\u4ee5\u8868\u793a\u865a\u62df\u7684\u6570\u503c\uff0c\u5373\u7b26\u53f7\u53d8\u91cf\u3002<\/p>\n\n\n\n
>>> x = state.solver.BVS(\"x\", 64)\n>>> x\n<BV64 x_0_64>\n>>> y = state.solver.BVS(\"y\", 64)\n>>> y\n<BV64 y_1_64><\/code><\/pre>\n\n\n\n\u800c\u7b26\u53f7\u53d8\u91cf\u4e4b\u95f4\u7684\u8fd0\u7b97\u540c\u6837\u4e0d\u4f1a\u65f6\u5177\u4f53\u7684\u6570\u503c\uff0c\u800c\u662f\u4e00\u4e2aAST\uff0c\u6240\u4ee5\u6211\u4eec\u63a5\u4e0b\u6765\u540c\u6837\u4f7f\u7528bitvector\u6765\u6307\u4ee3AST\uff1a<\/p>\n\n\n\n
>>> x + 0x10\n<BV64 x_0_64 + 0x10>\n>>> (x + 0x10) \/ 2\n<BV64 (x_0_64 + 0x10) \/ 0x2>\n>>> x - y\n<BV64 x_0_64 - y_1_64><\/code><\/pre>\n\n\n\n\u6bcf\u4e2aAST\u90fd\u6709\u4e00\u4e2a.op\u548c\u4e00\u4e2a.args\u5c5e\u6027\uff1a<\/p>\n\n\n\n
>>> tree = (x + 1) \/ (y + 2)\n>>> tree\n<BV64 (x_0_64 + 0x1) \/ (y_1_64 + 0x2)>\n>>> tree.op # op \u662f\u8868\u793a\u64cd\u4f5c\u7b26\u7684\u5b57\u7b26\u4e32\n'__floordiv__'\n>>> tree.args # args \u662f\u64cd\u4f5c\u6570\n(<BV64 x_0_64 + 0x1>, <BV64 y_1_64 + 0x2>)\n>>> tree.args[0].op\n'__add__'\n>>> tree.args[0].args\n(<BV64 x_0_64>, <BV64 0x1>)\n>>> tree.args[0].args[1].op\n'BVV'\n>>> tree.args[0].args[1].args\n(1L, 64)<\/code><\/pre>\n\n\n\n\u77e5\u9053\u4e86\u7b26\u53f7\u53d8\u91cf\u7684\u8868\u793a\uff0c\u63a5\u4e0b\u6765\u770b\u7b26\u53f7\u7ea6\u675f\uff1a<\/p>\n\n\n\n
>>> x == 1 # AST \u6bd4\u8f83\u4f1a\u5f97\u5230\u4e00\u4e2a\u7b26\u53f7\u5316\u7684\u5e03\u5c14\u503c\n<Bool x_0_64 == 0x1>\n>>> x + y > 100\n<Bool (x_0_64 + y_1_64) > 0x64>\n\n>>> state.solver.BVV(1, 64) > 0 # \u65e0\u7b26\u53f7\u6570 1\n<Bool True>\n>>> state.solver.BVV(-1, 64) > 0 # \u65e0\u7b26\u53f7\u6570 0xffffffffffffffff\n<Bool True><\/code><\/pre>\n\n\n\n\u6b63\u56e0\u4e3a\u5e03\u5c14\u503c\u662f\u7b26\u53f7\u5316\u7684\uff0c\u6240\u4ee5\u5728\u9700\u8981\u505aif\u6216\u8005while\u5224\u65ad\u7684\u65f6\u5019\uff0c\u4e0d\u8981\u76f4\u63a5\u4f7f\u7528\u6bd4\u8f83\u4f5c\u4e3a\u6761\u4ef6\uff0c\u800c\u5e94\u8be5\u4f7f\u7528.is_true\u548c.is_false\u6765\u8fdb\u884c\u5224\u65ad\uff1a<\/p>\n\n\n\n
>>> yes = state.solver.BVV(1, 64) > 0\n>>> yes\n<Bool True>\n>>> state.solver.is_true(yes)\nTrue\n>>> state.solver.is_false(yes)\nFalse\n\n>>> maybe = x == y\n>>> maybe\n<Bool x_0_64 == y_1_64>\n>>> state.solver.is_true(maybe)\nFalse\n>>> state.solver.is_false(maybe)\nFalse<\/code><\/pre>\n\n\n\n\u4e3a\u4e86\u8fdb\u884c\u7b26\u53f7\u6c42\u89e3\uff0c\u9996\u5148\u8981\u5c06\u7b26\u53f7\u5316\u5e03\u5c14\u503c\u4f5c\u4e3a\u7b26\u53f7\u53d8\u91cf\u6709\u6548\u503c\u7684\u65ad\u8a00\u52a0\u5165\u5230state\u4e2d\uff0c\u4f5c\u4e3a\u9650\u5236\u6761\u4ef6\uff0c\u5f53\u7136\u5982\u679c\u6dfb\u52a0\u4e86\u65e0\u6cd5\u6ee1\u8db3\u7684\u9650\u5236\u6761\u4ef6\uff0c\u5c06\u65e0\u6cd5\u6c42\u89e3<\/p>\n\n\n\n
>>> state.solver.add(x > y) # \u6dfb\u52a0\u9650\u5236\u6761\u4ef6\n[<Bool x_0_64 > y_1_64>]\n>>> state.solver.add(y > 2)\n[<Bool y_1_64 > 0x2>]\n>>> state.solver.add(10 > x)\n[<Bool x_0_64 < 0xa>]\n\n>>> state.satisfiable() # \u53ef\u4ee5\u6c42\u89e3\nTrue\n>>> state.solver.eval(x + y) # eval \u6c42\u89e3\u5f97\u5230\u4efb\u610f\u4e00\u4e2a\u7b26\u5408\u6761\u4ef6\u7684\u503c\n15L\n>> state.solver.eval_one(x + y) # \u6c42\u89e3\u5f97\u5230\u7ed3\u679c\uff0c\u5982\u679c\u6709\u4e0d\u6b62\u4e00\u4e2a\u7ed3\u679c\u5219\u629b\u51fa\u5f02\u5e38\n>>> state.solver.eval_upto(x + y, 5) # \u7ed9\u51fa\u6700\u591a 5 \u4e2a\u7ed3\u679c\n[16L, 13L, 8L, 9L, 17L]\n>>> state.solver.eval_atleast(x + y, 5) # \u7ed9\u51fa\u81f3\u5c11 5 \u4e2a\u7ed3\u679c\uff0c\u5426\u5219\u629b\u51fa\u5f02\u5e38\n[16L, 13L, 8L, 9L, 17L]\n>>> state.solver.eval_exact(x + y, 5) # \u6709\u6b63\u597d 5 \u4e2a\u7ed3\u679c\uff0c\u5426\u5219\u629b\u51fa\u5f02\u5e38\n>>> state.solver.min(x + y) # \u7ed9\u51fa\u6700\u5c0f\u7684\u7ed3\u679c\n7L\n>>> state.solver.max(x + y) # \u7ed9\u51fa\u6700\u5927\u7684\u7ed3\u679c\n17L\n\n>>> state.solver.eval(x + y, extra_constraints=[x + y < 10, x + y > 5]) # \u989d\u5916\u6dfb\u52a0\u4e34\u65f6\u9650\u5236\u6761\u4ef6\n8L\n>>> state.solver.eval(x + y, cast_to=str) # \u6307\u5b9a\u8f93\u51fa\u683c\u5f0f\n'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x08'\n\n>>> state.solver.add(x - y > 10) # \u6dfb\u52a0\u4e0d\u53ef\u6ee1\u8db3\u7684\u9650\u5236\u6761\u4ef6\n[<Bool (x_0_64 - y_1_64) > 0xa>]\n>>> state.satisfiable() # \u65e0\u6cd5\u6c42\u89e3\nFalse<\/code><\/pre>\n\n\n\nangr\u4f7f\u7528z3\u4f5c\u4e3a\u7ea6\u675f\u6c42\u89e3\u5668\uff0c\u800cz3\u652f\u6301IEEE754\u6d6e\u70b9\u6570\u7684\u7406\u8bba\uff0c\u6240\u4ee5\u6211\u4eec\u4e5f\u53ef\u4ee5\u4f7f\u7528\u6d6e\u70b9\u6570\u3002\u4f7f\u7528FPV\u548cFPS\u5373\u53ef\u521b\u5efa\u6d6e\u70b9\u6570\u503c\u548c\u6d6e\u70b9\u7b26\u53f7<\/p>\n\n\n\n
>>> state = proj.factory.entry_state() # \u5237\u65b0\u72b6\u6001\n>>> a = state.solver.FPV(3.2, state.solver.fp.FSORT_DOUBLE) # \u6d6e\u70b9\u6570\u503c\n>>> a\n<FP64 FPV(3.2, DOUBLE)>\n\n>>> b = state.solver.FPS('b', state.solver.fp.FSORT_DOUBLE) # \u6d6e\u70b9\u7b26\u53f7\n>>> b\n<FP64 FPS('FP_b_2_64', DOUBLE)>\n\n>>> a + b\n<FP64 fpAdd('RNE', FPV(3.2, DOUBLE), FPS('FP_b_2_64', DOUBLE))>\n>>> a + 1.1\n<FP64 FPV(4.300000000000001, DOUBLE)>\n\n>>> a + 1.1 > 0\n<Bool True>\n>>> b + 1.1 > 0\n<Bool fpGT(fpAdd('RNE', FPS('FP_b_2_64', DOUBLE), FPV(1.1, DOUBLE)), FPV(0.0, DOUBLE))>\n\n>>> state.solver.add(b + 2 < 0)\n[<Bool fpLT(fpAdd('RNE', FPS('FP_b_2_64', DOUBLE), FPV(2.0, DOUBLE)), FPV(0.0, DOUBLE))>]\n>>> state.solver.add(b + 2 > -1)\n[<Bool fpGT(fpAdd('RNE', FPS('FP_b_2_64', DOUBLE), FPV(2.0, DOUBLE)), FPV(-1.0, DOUBLE))>]\n>>> state.solver.eval(b)\n-2.4999999999999996<\/code><\/pre>\n\n\n\nbitvectors\u548c\u6d6e\u70b9\u6570\u7684\u8f6c\u6362\u4f7f\u7528raw_to_bv\u548craw_to_fp<\/p>\n\n\n\n
>>> a.raw_to_bv()\n<BV64 0x400999999999999a>\n>>> b.raw_to_bv()\n<BV64 fpToIEEEBV(FPS('FP_b_2_64', DOUBLE))>\n\n>>> state.solver.BVV(0, 64).raw_to_fp()\n<FP64 FPV(0.0, DOUBLE)>\n>>> state.solver.BVS('x', 64).raw_to_fp()\n<FP64 fpToFP(x_3_64, DOUBLE)><\/code><\/pre>\n\n\n\n\u6216\u8005\u5982\u679c\u6211\u4eec\u9700\u8981\u6307\u5b9a\u5bbd\u5ea6\u7684bitvectors\uff0c\u53ef\u4ee5\u4f7f\u7528val_to_bv\u548cval_to_fp<\/p>\n\n\n\n
>>> a\n<FP64 FPV(3.2, DOUBLE)>\n>>> a.val_to_bv(12)\n<BV12 0x3>\n>>> a.val_to_bv(12).val_to_fp(state.solver.fp.FSORT_FLOAT)\n<FP32 FPV(3.0, FLOAT)><\/code><\/pre>\n\n\n\n\u7a0b\u5e8f\u72b6\u6001<\/h2>\n\n\n\n
state.step()\u7528\u4e8e\u6a21\u62df\u6267\u884c\u7684\u4e00\u4e2abasic block\u5e76\u8fd4\u56de\u4e00\u4e2aSimSuccessors\u7c7b\u578b\u7684\u5bf9\u8c61\uff0c\u7531\u4e8e\u7b26\u53f7\u6267\u884c\u53ef\u80fd\u4ea7\u751f\u591a\u4e2astate\uff0c\u6240\u4ee5\u8be5\u5bf9\u8c61\u7684.successors\u5c5e\u6027\u662f\u4e00\u4e2a\u5217\u8868\uff0c\u5305\u542b\u4e86\u6240\u6709\u53ef\u80fd\u7684state\u3002
\u7a0b\u5e8f\u72b6\u6001state\u662f\u4e00\u4e2aSimState\u7c7b\u578b\u7684\u5bf9\u8c61\uff0cangr.factory.AngrObjectFactory\u7c7b\u63d0\u4f9b\u4e86\u521b\u5efastate\u5bf9\u8c61\u7684\u65b9\u6cd5\uff1a<\/p>\n\n\n\n
\n- .blank_state()\uff1a\u8fd4\u56de\u4e00\u4e2a\u51e0\u4e4e\u6ca1\u6709\u521d\u59cb\u5316\u7684 state \u5bf9\u8c61\uff0c\u5f53\u8bbf\u95ee\u672a\u521d\u59cb\u5316\u7684\u6570\u636e\u65f6\uff0c\u5c06\u8fd4\u56de\u4e00\u4e2a\u6ca1\u6709\u7ea6\u675f\u6761\u4ef6\u7684\u7b26\u53f7\u503c\u3002<\/li>\n\n\n\n
- .entry_state()\uff1a\u4ece\u4e3b\u5bf9\u8c61\u6587\u4ef6\u7684\u5165\u53e3\u70b9\u521b\u5efa\u4e00\u4e2astate\u3002<\/li>\n\n\n\n
- .full_init_state()\uff1a\u4e0eentry_state() \u7c7b\u4f3c\uff0c\u4f46\u6267\u884c\u4e0d\u662f\u4ece\u5165\u53e3\u70b9\u5f00\u59cb\uff0c\u800c\u662f\u4ece\u4e00\u4e2a\u7279\u6b8a\u7684SimProcedure\u5f00\u59cb\uff0c\u5728\u6267\u884c\u5230\u5165\u53e3\u70b9\u4e4b\u524d\u8c03\u7528\u5fc5\u8981\u7684\u521d\u59cb\u5316\u51fd\u6570\u3002<\/li>\n\n\n\n
- .call_state()\uff1a\u521b\u5efa\u4e00\u4e2a\u51c6\u5907\u6267\u884c\u7ed9\u5b9a\u51fd\u6570\u7684state\u3002<\/li>\n<\/ul>\n\n\n\n
\n- \u6240\u6709\u65b9\u6cd5\u90fd\u53ef\u4ee5\u4f20\u5165\u53c2\u6570addr\u6765\u6307\u5b9a\u5f00\u59cb\u5730\u5740<\/li>\n\n\n\n
- \u53ef\u4ee5\u901a\u8fc7args\u4f20\u5165\u53c2\u6570\u5217\u8868\uff0cenv\u4f20\u5165\u73af\u5883\u53d8\u91cf\u3002\u7c7b\u578b\u53ef\u4ee5\u662f\u5b57\u7b26\u4e32\uff0c\u4e5f\u53ef\u4ee5\u662fbv<\/li>\n\n\n\n
- \u901a\u8fc7\u4f20\u5165\u4e00\u4e2a\u7b26\u53f7bv\u4f5c\u4e3aargc\uff0c\u53ef\u4ee5\u5c06argc\u7b26\u53f7\u5316<\/li>\n\n\n\n
- \u5bf9\u4e8e.call_state(addr, arg1, arg2, \u2026)\uff0caddr\u662f\u5e0c\u671b\u8c03\u7528\u7684\u51fd\u6570\u5730\u5740\uff0cargN\u662f\u4f20\u9012\u7ed9\u51fd\u6570\u7684n\u4e2a\u53c2\u6570\uff0c\u5982\u679c\u5e0c\u671b\u5206\u914d\u4e00\u4e2a\u5185\u5b58\u7a7a\u95f4\u5e76\u4f20\u9012\u6307\u9488\uff0c\u5219\u9700\u8981\u4f7f\u7528angr.PointerWrapper()\uff0c\u5982\u679c\u9700\u8981\u6307\u5b9a\u8c03\u7528\u7ea6\u5b9a\uff0c\u53ef\u4ee5\u4f20\u9012\u4e00\u4e2aSimCC\u5bf9\u8c61\u4f5c\u4e3acc\u53c2\u6570
\u521b\u5efa\u7684state\u53ef\u4ee5\u5f88\u65b9\u4fbf\u7684\u590d\u5236\u548c\u5408\u5e76<\/li>\n<\/ol>\n\n\n\n>>> s = proj.factory.blank_state()\n>>> s1 = s.copy() # \u590d\u5236 state\n>>> s2 = s.copy()\n\n>>> s1.mem[0x1000].uint32_t = 0x41414141\n>>> s2.mem[0x1000].uint32_t = 0x42424242\n\n>>> (s_merged, m, anything_merged) = s1.merge(s2) # \u5408\u5e76\u5c06\u8fd4\u56de\u4e00\u4e2a\u5143\u7ec4\n>>> s_merged # \u8868\u793a\u5408\u5e76\u540e\u7684 state\n<SimState @ 0x405000>\n>>> m # \u63cf\u8ff0 state flag \u7684\u7b26\u53f7\u53d8\u91cf\n[<Bool state_merge_1_14_16 == 0x0>, <Bool state_merge_1_14_16 == 0x1>]\n>>> anything_merged # \u63cf\u8ff0\u662f\u5426\u5168\u90e8\u5408\u5e76\u7684\u5e03\u5c14\u503c\nTrue\n\n>>> aaaa_or_bbbb = s_merged.mem[0x1000].uint32_t # \u6b64\u65f6\u7684\u503c\u9700\u8981\u6839\u636e state flag \u6765\u5224\u65ad\n>>> aaaa_or_bbbb\n<uint32_t <BV32 Reverse((if (state_merge_1_14_16 == 0x1) then 0x42424242 else (if (state_merge_1_14_16 == 0x0) then 0x41414141 else 0x0)))> at 0x1000><\/code><\/pre>\n\n\n\n\u4f7f\u7528state.mem\u53ef\u4ee5\u5f88\u65b9\u4fbf\u7684\u64cd\u4f5c\u5185\u5b58\uff0c\u4f46\u5982\u679c\u4f60\u60f3\u8981\u5bf9\u5185\u5b58\u8fdb\u884c\u539f\u59cb\u7684\u64cd\u4f5c\u65f6\uff0c\u53ef\u4ee5\u4f7f\u7528state.memory\u7684.load(addr, size)\u548c.store(addr, val)<\/p>\n\n\n\n
>>> s = proj.factory.blank_state()\n>>> s.memory.store(0x4000, s.solver.BVV(0x0123456789abcdef, 128)) # \u9ed8\u8ba4\u5927\u7aef\u5e8f\n>>> s.memory.load(0x4008, 8) # \u9ed8\u8ba4\u5927\u7aef\u5e8f\n<BV64 0x123456789abcdef>\n>>> s.memory.load(0x4008, 8, endness=angr.archinfo.Endness.LE) # \u5c0f\u7aef\u5e8f\n<BV64 0xefcdab8967452301>\n>>> s.mem[0x4008].uint64_t.resolved # \u4e0e mem \u5bf9\u6bd4\n<BV64 0xefcdab8967452301>\n\n>>> s.memory.store(0x4000, s.solver.BVV(0x0123456789abcdef, 128), endness=angr.archinfo.Endness.LE) # \u5c0f\u7aef\u5e8f\n>>> s.memory.load(0x4000, 8) # \u9ed8\u8ba4\u5927\u7aef\u5e8f\n<BV64 0xefcdab8967452301>\n>>> s.memory.load(0x4000, 8, endness=angr.archinfo.Endness.LE) # \u5c0f\u7aef\u5e8f\n<BV64 0x123456789abcdef>\n>>> s.mem[0x4000].uint64_t.resolved # \u4e0e mem \u5bf9\u6bd4\n<BV64 0x123456789abcdef><\/code><\/pre>\n\n\n\n\u9ed8\u8ba4\u60c5\u51b5\u4e0bstore\u548cload\u90fd\u4f7f\u7528\u5927\u7aef\u5e8f\u4eec\u53ef\u4ee5\u901a\u8fc7\u6307\u5b9a\u53c2\u6570endness\u6765\u4f7f\u7528\u5c0f\u7aef\u5e8f
\u901a\u8fc7state.options\u53ef\u4ee5\u5bf9angr\u7684\u884c\u4e3a\u505a\u7279\u5b9a\u7684\u4f18\u5316\u3002\u6211\u4eec\u65e2\u53ef\u4ee5\u5728\u521b\u5efastate\u65f6\u5c06option\u4f5c\u4e3a\u53c2\u6570\u4f20\u9012\u8fdb\u53bb\uff0c\u4e5f\u53ef\u4ee5\u5bf9\u5df2\u7ecf\u5b58\u5728\u7684state\u8fdb\u884c\u4fee\u6539\u3002<\/p>\n\n\n\n
>>> s = proj.factory.blank_state(add_options={angr.options.LAZY_SOLVES}) # \u542f\u7528 options\n>>> s = proj.factory.blank_state(remove_options={angr.options.LAZY_SOLVES}) # \u7981\u7528 options\n\n>>> s.options.add(angr.options.LAZY_SOLVES) # \u542f\u7528 option\n>>> s.options.remove(angr.options.LAZY_SOLVES) # \u7981\u7528 option<\/code><\/pre>\n\n\n\nSimState\u5bf9\u8c61\u7684\u6240\u6709\u5185\u5bb9\uff08\u5305\u62ecmemory\u3001registers\u3001mem\u7b49\uff09\u90fd\u662f\u4ee5\u63d2\u4ef6\u7684\u5f62\u5f0f\u5b58\u50a8\u7684\uff0c\u8fd9\u6837\u505a\u7684\u597d\u5904\u662f\u5c06\u4ee3\u7801\u6a21\u5757\u5316\uff0c\u5982\u679c\u6211\u4eec\u60f3\u8981\u5728state\u4e2d\u5b58\u50a8\u5176\u4ed6\u7684\u6570\u636e\uff0c\u90a3\u4e48\u76f4\u63a5\u5b9e\u73b0\u4e00\u4e2a\u63d2\u4ef6\u5c31\u53ef\u4ee5\u4e86<\/p>\n\n\n\n
\n- state.globals:\u5b9e\u73b0\u4e86\u4e00\u4e2a\u6807\u51c6\u7684Python dict\u7684\u63a5\u53e3\uff0c\u901a\u8fc7\u5b83\u53ef\u4ee5\u5728\u4e00\u4e2astate\u4e0a\u5b58\u50a8\u4efb\u610f\u7684\u6570\u636e\u3002<\/li>\n\n\n\n
- state.history:\u5b58\u50a8\u4e86\u4e00\u4e2astate\u5728\u6267\u884c\u8fc7\u7a0b\u4e2d\u7684\u8def\u5f84\u5386\u53f2\u6570\u636e\uff0c\u5b83\u662f\u4e00\u4e2a\u94fe\u8868\uff0c\u6bcf\u4e2a\u8282\u70b9\u8868\u793a\u4e00\u4e2a\u6267\u884c\uff0c\u901a\u8fc7\u50cfhistory.parent.parent\u8fd9\u6837\u7684\u65b9\u5f0f\u8fdb\u884c\u904d\u5386\u3002\u4e3a\u4e86\u5f97\u5230history\u4e2d\u67d0\u4e2a\u5177\u4f53\u7684\u503c\uff0c\u53ef\u4ee5\u4f7f\u7528\u8fed\u4ee3\u5668history.NAME\uff0c\u503c\u4fdd\u5b58\u5728history.recent_NAME\uff0c\u5982\u679c\u60f3\u8981\u5feb\u901f\u5f97\u5230\u8fd9\u4e9b\u503c\u7684\u4e00\u4e2a\u5217\u8868\uff0c\u53ef\u4ee5\u67e5\u770b.hardcopy<\/li>\n\n\n\n
- history.descriptions\uff1a\u5bf9state\u6bcf\u6b21\u6267\u884c\u7684\u63cf\u8ff0\u7684\u5217\u8868\u3002<\/li>\n\n\n\n
- history.bbl_addrs\uff1astate\u6bcf\u6b21\u6267\u884c\u7684basic block\u7684\u5730\u5740\u7684\u5217\u8868\uff0c\u6bcf\u6b21\u6267\u884c\u53ef\u80fd\u591a\u4e8e\u4e00\u4e2a\u5730\u5740\uff0c\u4e5f\u53ef\u80fd\u662f\u88abhook\u7684SimProcedures\u7684\u5730\u5740\u3002<\/li>\n\n\n\n
- history.jumpkinds\uff1astate\u6bcf\u6b21\u6267\u884c\u65f6\u6539\u53d8\u63a7\u5236\u6d41\u7684\u64cd\u4f5c\u7684\u5217\u8868\u3002<\/li>\n\n\n\n
- history.guards\uff1astate\u6267\u884c\u4e2d\u9047\u5230\u7684\u6bcf\u4e2a\u5206\u652f\u7684\u6761\u4ef6\u7684\u5217\u8868\u3002<\/li>\n\n\n\n
- history.events\uff1astate\u6267\u884c\u4e2d\u9047\u5230\u7684\u53ef\u80fd\u6709\u7528\u7684\u4e8b\u4ef6\u7684\u5217\u8868\u3002<\/li>\n\n\n\n
- history.actions\uff1a\u901a\u5e38\u662f\u7a7a\u7684\uff0c\u4f46\u5982\u679c\u542f\u7528\u4e86options.refs\uff0c\u5219\u4f1a\u8bb0\u5f55\u7a0b\u5e8f\u6267\u884c\u65f6\u8bbf\u95ee\u7684\u6240\u6709\u5185\u5b58\u3001\u5bc4\u5b58\u5668\u548c\u4e34\u65f6\u53d8\u91cf\u3002<\/li>\n\n\n\n
- state.callstack\uff1a\u7528\u4e8e\u8bb0\u5f55\u51fd\u6570\u8c03\u7528\u5806\u6808\uff0c\u5b83\u662f\u4e00\u4e2a\u94fe\u8868\uff0c\u53ef\u4ee5\u76f4\u63a5\u904d\u5386\u3002<\/li>\n\n\n\n
- state.callstack\uff1a\u83b7\u5f97\u6bcf\u4e2a\u8c03\u7528\u7684 frame\u3002<\/li>\n\n\n\n
- callstack.func_addr\uff1a\u5f53\u524d\u6b63\u5728\u6267\u884c\u7684\u51fd\u6570\u7684\u5730\u5740\u3002<\/li>\n\n\n\n
- callstack.call_site_addr\uff1a\u8c03\u7528\u5f53\u524d\u51fd\u6570\u7684basic block\u7684\u5730\u5740\u3002<\/li>\n\n\n\n
- callstack.stack_ptr\uff1a\u4ece\u5f53\u524d\u51fd\u6570\u5f00\u5934\u5f00\u59cb\u8ba1\u7b97\u7684\u5806\u6808\u6307\u9488\u7684\u503c\u3002<\/li>\n\n\n\n
- callstack.ret_addr\uff1a\u5f53\u524d\u51fd\u6570\u7684\u8fd4\u56de\u5730\u5740\u3002<\/li>\n<\/ul>\n\n\n\n
vex ir<\/h2>\n\n\n\n
angr\u4f7f\u7528\u4e86VEX\u4f5c\u4e3a\u4e8c\u8fdb\u5236\u5206\u6790\u7684\u4e2d\u95f4\u8868\u793a\u3002VEX IR\u662f\u7531Valgrind\u9879\u76ee\u5f00\u53d1\u548c\u4f7f\u7528\u7684\u4e2d\u95f4\u8868\u793a\uff0c\u540e\u6765\u8fd9\u4e00\u90e8\u5206\u88ab\u5206\u79bb\u51fa\u53bb\u4f5c\u4e3alibVEX\uff0clibVEX\u7528\u4e8e\u5c06\u673a\u5668\u7801\u8f6c\u6362\u6210VEX IR\uff0c\u5728angr\u9879\u76ee\u4e2d\uff0c\u5f00\u53d1\u4e86\u6a21\u5757PyVEX\u4f5c\u4e3alibVEX\u7684Python\u5305\u88c5<\/p>\n\n\n\n
>>> import pyvex, archinfo\n>>> bb = pyvex.IRSB('\\xc3', 0x400400, archinfo.ArchAMD64()) # \u5c06\u4e00\u4e2a\u4f4d\u4e8e 0x400400 \u7684 AMD64 \u57fa\u672c\u5757\uff08\\xc3\uff0c\u5373ret\uff09\u8f6c\u6210 VEX\n>>> bb.pp() # \u6253\u5370 IRSB\uff08Intermediate Representation Super Block\uff09\nIRSB {\n t0:Ity_I64 t1:Ity_I64 t2:Ity_I64 t3:Ity_I64\n\n 00 | ------ IMark(0x400400, 1, 0) ------\n 01 | t0 = GET:I64(rsp)\n 02 | t1 = LDle:I64(t0)\n 03 | t2 = Add64(t0,0x0000000000000008)\n 04 | PUT(rsp) = t2\n 05 | t3 = Sub64(t2,0x0000000000000080)\n 06 | ====== AbiHint(0xt3, 128, t1) ======\n NEXT: PUT(rip) = t1; Ijk_Ret\n}\n\n>>> bb.statements[3] # \u8868\u8fbe\u5f0f\n<pyvex.stmt.WrTmp object at 0x7f38f1ef84b0>\n>>> bb.statements[3].pp()\nt2 = Add64(t0,0x0000000000000008)\n\n>>> bb.statements[3].data # \u6570\u636e\n<pyvex.expr.Binop object at 0x7f38f1ef8460>\n>>> bb.statements[3].data.pp()\nAdd64(t0,0x0000000000000008)\n\n>>> bb.statements[3].data.op # \u64cd\u4f5c\u7b26\n'Iop_Add64'\n\n>>> bb.statements[3].data.args # \u53c2\u6570\n[<pyvex.expr.RdTmp object at 0x7f38f1f77cb0>, <pyvex.expr.Const object at 0x7f38f1f77098>]\n>>> bb.statements[3].data.args[0]\n<pyvex.expr.RdTmp object at 0x7f38f1f77cb0>\n>>> bb.statements[3].data.args[0].pp()\nt0\n\n>>> bb.next # \u57fa\u672c\u5757\u672b\u5c3e\u65e0\u6761\u4ef6\u8df3\u8f6c\u7684\u76ee\u6807\n<pyvex.expr.RdTmp object at 0x7f38f3cb6f38>\n>>> bb.next.pp()\nt1\n\n>>> bb.jumpkind # \u65e0\u6761\u4ef6\u8df3\u8f6c\u7684\u7c7b\u578b\n'Ijk_Ret'<\/code><\/pre>\n\n\n\n\u6269\u5c55\u5de5\u5177<\/h2>\n\n\n\n
Patcherex\uff1a\u4e8c\u8fdb\u5236\u6587\u4ef6\u81ea\u52a8\u5316patch\u5f15\u64ce<\/a>
Driller\uff1a\u7528\u7b26\u53f7\u6267\u884c\u589e\u5f3aAFL\u7684\u4e0b\u4e00\u4ee3fuzzer<\/a>4
Rex\uff1a\u81ea\u52a8\u5316\u6f0f\u6d1e\u5229\u7528\u5f15\u64ce<\/a>
angrop\uff1arop\u94fe\u81ea\u52a8\u5316\u751f\u6210\u5668<\/a><\/p>\n\n\n\n\u7ed3\u675f<\/h2>\n\n\n\n
angr\u4f1a\u901a\u8fc7\u603b\u7ed3\u51fd\u6570\u6548\u679c\u7684SimProcedures\u6765Hook\u590d\u6742\u7684\u5e93\u51fd\u6570
\u8fd8\u6709\u4e00\u4e9b\u4e1c\u897f\u5b98\u65b9\u6587\u6863\u6ca1\u7ffb\u8bd1\u4e2d\u6587\u4e86\uff0c\u7b80\u5355\u5199\u4e00\u4e0b\u5728\u8fd9\u91cc\uff0c\u9047\u5230\u53ef\u4ee5\u770b\u5bf9\u5e94\u6587\u6863<\/p>\n\n\n\n
\u5185\u5efa\u5206\u6790 (Built-in Analyses)<\/h3>\n\n\n\n
CFG (Control Flow Graph)
\u5b83\u901a\u8fc7\u9759\u6001\u5206\u6790\uff0c\u753b\u51fa\u7a0b\u5e8f\u91cc\u6240\u6709\u7684\u51fd\u6570\u548c\u4ee3\u7801\u5757\uff08Basic Blocks\uff09\u4ee5\u53ca\u5b83\u4eec\u4e4b\u95f4\u662f\u600e\u4e48\u8df3\u8f6c\u7684\u3002\u8fd9\u662f\u505a\u590d\u6742\u5206\u6790\u7684\u57fa\u7840\u3002<\/p>\n\n\n\n
\u5411\u540e\u5207\u7247 (Backward Slicing)<\/h3>\n\n\n\n
\u5012\u63a8\u50cf\uff0c\u5047\u8bbe\u4f60\u53d1\u73b0\u7a0b\u5e8f\u5728\u67d0\u5904\u5d29\u6e83\u4e86\uff0c\u4f60\u53ea\u60f3\u77e5\u9053\u201c\u662f\u54ea\u4e9b\u4ee3\u7801\u5bfc\u81f4\u4e86\u8fd9\u6b21\u5d29\u6e83\u201d\uff0c\u800c\u4e0d\u60f3\u770b\u65e0\u5173\u4ee3\u7801\u3002\u5207\u7247\u6280\u672f\u80fd\u5e2e\u4f60\u4ece\u5d29\u6e83\u70b9\u5f80\u56de\u627e\uff0c\u53ea\u4fdd\u7559\u5f71\u54cd\u8be5\u7ed3\u679c\u7684\u4ee3\u7801\u8def\u5f84\u3002<\/p>\n\n\n\n
\u51fd\u6570\u6807\u8bc6\u7b26 (Function Identifier)<\/h3>\n\n\n\n
\u5728\u5206\u6790\u53bb\u9664\u4e86\u7b26\u53f7\u8868\uff08Stripped\uff09\u7684\u4e8c\u8fdb\u5236\u6587\u4ef6\u65f6\uff0c\u6211\u4eec\u4e0d\u77e5\u9053\u54ea\u4e2a\u51fd\u6570\u662fprintf\uff0c\u54ea\u4e2a\u662fstrcpy\u3002\u8fd9\u4e2a\u529f\u80fd\u901a\u8fc7\u6bd4\u5bf9\u7279\u5f81\uff08\u6307\u7eb9\uff09\uff0c\u5c1d\u8bd5\u81ea\u52a8\u8bc6\u522b\u51fa\u8fd9\u4e9b\u6807\u51c6\u5e93\u51fd\u6570\uff0c\u65b9\u4fbf\u4f60\u9605\u8bfb\u3002<\/p>\n\n\n\n
Gotchas<\/h3>\n\n\n\n
\u5b98\u65b9\u7684\u4e00\u4e2a\u907f\u5751\u6307\u5357\uff0c\u6bd4\u5982\u5185\u5b58\u6a21\u578b\u662f\u5982\u4f55\u5904\u7406\u672a\u521d\u59cb\u5316\u5185\u5b58\u7684\uff0c\u6216\u8005\u4e3a\u4ec0\u4e48\u6709\u65f6\u5019\u811a\u672c\u8dd1\u4e0d\u5b8c\u3002<\/p>\n\n\n\n
The Whole Pipeline<\/h3>\n\n\n\n
\u63cf\u8ff0\u4e86\u4ece\u4f60\u8f93\u5165\u4e00\u4e2a\u4e8c\u8fdb\u5236\u6587\u4ef6\u5f00\u59cb\uff0c\u6570\u636e\u662f\u5982\u4f55\u5728CLE\uff08\u52a0\u8f7d\uff0cArch\uff08\u67b6\u6784\u5b9a\u4e49\uff09\uff0cSimState\uff08\u72b6\u6001\uff09\u3001Engine\uff08\u6267\u884c\uff09\u4e4b\u95f4\u6d41\u8f6c\u7684\u5b8c\u6574\u751f\u547d\u5468\u671f\u3002<\/p>\n\n\n\n
Speed Considerations<\/h3>\n\n\n\n
\u7b26\u53f7\u6267\u884c\u975e\u5e38\u6162\uff08\u56e0\u4e3a\u8981\u89e3\u65b9\u7a0b\uff09\u3002\u8fd9\u90e8\u5206\u6559\u4f60\u5982\u4f55\u901a\u8fc7\u8bbe\u7f6e\uff08\u6bd4\u5982\u8df3\u8fc7\u590d\u6742\u7684\u5e93\u51fd\u6570\u3001\u7b80\u5316\u7ea6\u675f\u6c42\u89e3\u3001\u4f7f\u7528\u4e0d\u540c\u7684\u5185\u5b58\u6a21\u578b\uff09\u6765\u8ba9\u5206\u6790\u901f\u5ea6\u63d0\u534710\u500d\u751a\u81f3100\u500d\u3002<\/p>\n\n\n\n
Intermediate Representation (IR)<\/h3>\n\n\n\n
\u4e2d\u95f4\u8bed\u8a00vex\uff0cangr \u5e76\u4e0d\u76f4\u63a5\u5206\u6790 x86\u3001ARM \u6216 MIPS \u6307\u4ee4\u3002\u5b83\u5148\u628a\u6240\u6709\u67b6\u6784\u7684\u6307\u4ee4\u90fd\u7ffb\u8bd1\u6210\u4e00\u79cd\u53ebVEX\u7684\u901a\u7528\u4e2d\u95f4\u8bed\u8a00\u3002\u8fd9\u6837angr\u53ea\u9700\u8981\u5b66\u4f1a\u5206\u6790VEX\uff0c\u5c31\u80fd\u652f\u6301\u51e0\u4e4e\u6240\u6709CPU\u67b6\u6784\u3002<\/p>\n\n\n\n
Working with Data and Conventions<\/h3>\n\n\n\n
\u6570\u636e\u4e0e\u8c03\u7528\u7ea6\u5b9a\uff0c\u4e0d\u540c\u7684\u7cfb\u7edf\uff08Linux\/Windows\uff09\u548c\u67b6\u6784\u4f20\u53c2\u65b9\u5f0f\u4e0d\u540c\uff08\u6709\u7684\u7528\u5bc4\u5b58\u5668\uff0c\u6709\u7684\u7528\u6808\uff09\u3002\u8fd9\u90e8\u5206\u6559\u4f60\u5982\u4f55\u6b63\u786e\u5730\u8bfb\u53d6\u51fd\u6570\u53c2\u6570\u3001\u5904\u7406\u6574\u6570\/\u6d6e\u70b9\u6570\u7c7b\u578b\u8f6c\u6362\u3002<\/p>\n\n\n\n
Claripy<\/h3>\n\n\n\n
\u6570\u636e\u62bd\u8c61\u5c42\uff0c\u867d\u7136\u4f60\u5df2\u7ecf\u4e86\u89e3\u4e86Solver\uff0c\u4f46Claripy\u662fangr\u7528\u6765\u8868\u793a\u201c\u7b26\u53f7\u201d\u548c\u201c\u5177\u4f53\u6570\u503c\u201d\u7684\u901a\u7528\u8bed\u8a00\u3002\u5b83\u628a\u5e95\u5c42\u7684\u6570\u5b66\u6c42\u89e3\u5668\uff08Z3\uff09\u5305\u88c5\u8d77\u6765\uff0c\u8ba9\u4f60\u80fd\u7528 Python \u8bed\u6cd5\uff08\u5982x+y >10\uff09\u6765\u63cf\u8ff0\u6570\u5b66\u7ea6\u675f\u3002<\/p>\n\n\n\n
Symbolic Memory Addressing<\/h3>\n\n\n\n
\u7b26\u53f7\u5316\u5185\u5b58\u5730\u5740\uff0c\u4f8b\u5982\uff0c\u7b26\u53f7\u6267\u884c\u4e2d\uff0c\u5982\u679c\u4ee3\u7801\u662fmov eax, [ebx]\uff0c\u4f46ebx\u662f\u4e2a\u672a\u77e5\u6570\uff08\u7b26\u53f7\uff09\uff0c\u90a3eax\u5230\u5e95\u8bfb\u4e86\u54ea\u91cc\u7684\u5185\u5b58\uff1f\u8fd9\u90e8\u5206\u89e3\u91ca\u4e86angr\u5904\u7406\u8fd9\u79cd\u201c\u859b\u5b9a\u8c14\u7684\u5185\u5b58\u8bfb\u53d6\u201d\u7684\u51e0\u79cd\u7b56\u7565\u3002<\/p>\n\n\n\n
\u6269\u5c55angr<\/h3>\n\n\n\nProgramming SimProcedures<\/h4>\n\n\n\n
\u7f16\u5199\u6a21\u62df\u8fc7\u7a0b\uff0c\u6559\u4f60\u5982\u4f55\u7528Python\u5199\u4ee3\u7801\u6765\u201c\u6b3a\u9a97\u201d\u7a0b\u5e8f\u3002\u6bd4\u5982\u7a0b\u5e8f\u8c03\u7528\u4e86 check_password()\uff0c\u4f60\u4e0d\u60f3\u5206\u6790\u5b83\u7684\u6c47\u7f16\uff0c\u53ef\u4ee5\u76f4\u63a5\u5199\u4e00\u4e2a Python \u51fd\u6570\u6765\u6a21\u62df\u5b83\u7684\u884c\u4e3a\uff08Hook\uff09\uff0c\u544a\u8bc9\u7a0b\u5e8f\u201c\u5bc6\u7801\u6b63\u786e\u201d\u3002<\/p>\n\n\n\n
Writing State Plugins<\/h4>\n\n\n\n
\u7f16\u5199\u72b6\u6001\u63d2\u4ef6\uff0c\u5982\u679c\u4f60\u60f3\u5728SimState\u91cc\u5b58\u4e00\u4e9b\u81ea\u5df1\u7684\u79c1\u8d27\uff08\u6bd4\u5982\u505a\u4e00\u4e2a\u5168\u5c40\u8ba1\u6570\u5668\uff0c\u6216\u8005\u8bb0\u5f55\u7279\u6b8a\u7684\u8986\u76d6\u7387\u4fe1\u606f\uff09\uff0c\u4f60\u9700\u8981\u5199\u4e00\u4e2a\u63d2\u4ef6\u628a\u5b83\u6302\u8f7d\u5230State\u4e0a\u3002<\/p>\n\n\n\n
Extending the Environment Model<\/h4>\n\n\n\n
\u6269\u5c55\u73af\u5883\u6a21\u578b\uff0c\u6a21\u62df\u64cd\u4f5c\u7cfb\u7edf\u5c42\u9762\u7684\u884c\u4e3a\u3002\u6bd4\u5982\u4f60\u60f3\u652f\u6301\u4e00\u79cd\u65b0\u7684\u7cfb\u7edf\u8c03\u7528\uff08Syscall\uff09\uff0c\u6216\u8005\u6a21\u62df\u4e00\u4e2a\u7279\u6b8a\u7684\u6587\u4ef6\u7cfb\u7edf\u884c\u4e3a\u3002<\/p>\n\n\n\n
Writing Exploration Techniques<\/h4>\n\n\n\n
\u7f16\u5199\u63a2\u7d22\u903b\u8f91\uff0c\u6559\u6a21\u62df\u7ba1\u7406\u5668\u600e\u4e48\u8df3\u8f6c\u3002\u9ed8\u8ba4\u53ef\u80fd\u662f\u201c\u6df1\u5ea6\u4f18\u5148\u201d\u6216\u201c\u5e7f\u5ea6\u4f18\u5148\u201d\uff0c\u4f60\u53ef\u4ee5\u5199\u81ea\u5df1\u7684\u7b56\u7565\uff0c\u6bd4\u5982\u201c\u770b\u5230\u5faa\u73af\u5c31\u8df3\u51fa\u201d\u6216\u8005\u201c\u53ea\u8d70\u5305\u542b\u7279\u5b9a\u6307\u4ee4\u7684\u8def\u5f84\u201d\u3002<\/p>\n\n\n\n
Writing Analyses<\/h4>\n\n\n\n
\u7f16\u5199\u5206\u6790\u7b97\u6cd5\uff0c\u6559\u4f60\u5982\u4f55\u5728angr\u7684\u6846\u67b6\u4e0a\u5f00\u53d1\u5c5e\u4e8e\u4f60\u81ea\u5df1\u7684\u9759\u6001\u5206\u6790\u5de5\u5177\uff0c\u5e76\u5c06\u5176\u96c6\u6210\u5230project.analyses\u4e2d\u3002<\/p>\n\n\n\n
Adding Support for New Architectures<\/h4>\n\n\n\n
\u6dfb\u52a0\u65b0\u67b6\u6784\u652f\u6301\uff0c\u5982\u679c\u4f60\u9047\u5230\u4e00\u4e2aangr\u4e0d\u652f\u6301\u7684\u51b7\u95e8CPU\u67b6\u6784\uff0c\u8fd9\u90e8\u5206\u6559\u4f60\u5982\u4f55\u7f16\u5199\u5bf9\u5e94\u7684\u67b6\u6784\u5b9a\u4e49\u548cVEX\u8f6c\u6362\u903b\u8f91\uff0c\u8ba9angr\u80fd\u5206\u6790\u5b83\u3002<\/p>\n\n\n\n
\u6587\u7ae0\uff0cvex<\/a>
angr<\/a>
angr\u901f\u901a<\/a>
angrctf<\/a>
angr\u5e94\u7528<\/a>
\u539f\u7406<\/a>
\u5b98\u65b9angr\u4e2d\u7ffb<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"\u73af\u5883\u914d\u7f6e \u4f9d\u8d56\u73af\u5883 \u9694\u79bb\u73af\u5883 \u6216\u8005\u770b\u8fd9\u4e2a \u6a21\u7cca\u6d4b\u8bd5 \u901a\u8fc7\u5411\u76ee\u6807\u7cfb\u7edf\u63d0\u4f9b\u975e\u9884\u671f\u7684\u8f93\u5165\u5e76\u76d1\u89c6\u5f02\u5e38\u7ed3\u679c\u6765\u53d1\u73b0\u8f6f\u4ef6\u6f0f\u6d1e […]<\/p>\n","protected":false},"author":1,"featured_media":88,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-87","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-learn"],"_links":{"self":[{"href":"http:\/\/8.210.123.186\/index.php\/wp-json\/wp\/v2\/posts\/87","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/8.210.123.186\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/8.210.123.186\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/8.210.123.186\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/8.210.123.186\/index.php\/wp-json\/wp\/v2\/comments?post=87"}],"version-history":[{"count":1,"href":"http:\/\/8.210.123.186\/index.php\/wp-json\/wp\/v2\/posts\/87\/revisions"}],"predecessor-version":[{"id":89,"href":"http:\/\/8.210.123.186\/index.php\/wp-json\/wp\/v2\/posts\/87\/revisions\/89"}],"wp:featuredmedia":[{"embeddable":true,"href":"http:\/\/8.210.123.186\/index.php\/wp-json\/wp\/v2\/media\/88"}],"wp:attachment":[{"href":"http:\/\/8.210.123.186\/index.php\/wp-json\/wp\/v2\/media?parent=87"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/8.210.123.186\/index.php\/wp-json\/wp\/v2\/categories?post=87"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/8.210.123.186\/index.php\/wp-json\/wp\/v2\/tags?post=87"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}