1 // Capstone Java binding
2 // By Nguyen Anh Quynh & Dang Hoang Vu,  2013
3 
4 import capstone.Capstone;
5 import capstone.X86;
6 
7 import static capstone.X86_const.*;
8 
9 public class TestX86 {
10 
hexString2Byte(String s)11   static byte[] hexString2Byte(String s) {
12     // from http://stackoverflow.com/questions/140131/convert-a-string-representation-of-a-hex-dump-to-a-byte-array-using-java
13     int len = s.length();
14     byte[] data = new byte[len / 2];
15     for (int i = 0; i < len; i += 2) {
16       data[i / 2] = (byte) ((Character.digit(s.charAt(i), 16) << 4)
17           + Character.digit(s.charAt(i+1), 16));
18     }
19     return data;
20   }
21 
22   static final String X86_CODE64 = "55488b05b8130000";
23   static final String X86_CODE16 = "8d4c320801d881c6341200000523010000368b849123010000418d8439896700008d8789670000b4c6";
24   static final String X86_CODE32 = "8d4c320801d881c6341200000523010000368b849123010000418d8439896700008d8789670000b4c6";
25 
26   public static Capstone cs;
27 
hex(int i)28   private static String hex(int i) {
29     return Integer.toString(i, 16);
30   }
31 
hex(long i)32   private static String hex(long i) {
33     return Long.toString(i, 16);
34   }
35 
array2hex(byte[] arr)36   private static String array2hex(byte[] arr) {
37     String ret = "";
38     for (int i=0 ;i<arr.length; i++)
39       ret += String.format("0x%02x ", arr[i]);
40     return ret;
41   }
42 
print_ins_detail(Capstone.CsInsn ins)43   public static void print_ins_detail(Capstone.CsInsn ins) {
44     System.out.printf("0x%x:\t%s\t%s\n", ins.address, ins.mnemonic, ins.opStr);
45 
46     X86.OpInfo operands = (X86.OpInfo) ins.operands;
47 
48     System.out.printf("\tPrefix: %s\n", array2hex(operands.prefix));
49 
50     System.out.printf("\tOpcode: %s\n", array2hex(operands.opcode));
51 
52     // print REX prefix (non-zero value is relevant for x86_64)
53     System.out.printf("\trex: 0x%x\n", operands.rex);
54 
55     // print address size
56     System.out.printf("\taddr_size: %d\n", operands.addrSize);
57 
58     // print modRM byte
59     System.out.printf("\tmodrm: 0x%x\n", operands.modrm);
60 
61     // print displacement value
62     System.out.printf("\tdisp: 0x%x\n", operands.disp);
63 
64     // SIB is not available in 16-bit mode
65     if ( (cs.mode & Capstone.CS_MODE_16) == 0) {
66       // print SIB byte
67       System.out.printf("\tsib: 0x%x\n", operands.sib);
68       if (operands.sib != 0)
69         System.out.printf("\t\tsib_base: %s\n\t\tsib_index: %s\n\t\tsib_scale: %d\n",
70           ins.regName(operands.sibBase), ins.regName(operands.sibIndex), operands.sibScale);
71     }
72 
73     if (operands.sseCC != 0)
74         System.out.printf("\tsse_cc: %u\n", operands.sseCC);
75 
76     if (operands.avxCC != 0)
77         System.out.printf("\tavx_cc: %u\n", operands.avxCC);
78 
79     if (operands.avxSae)
80         System.out.printf("\tavx_sae: TRUE\n");
81 
82     if (operands.avxRm != 0)
83         System.out.printf("\tavx_rm: %u\n", operands.avxRm);
84 
85     int count = ins.opCount(X86_OP_IMM);
86     if (count > 0) {
87       System.out.printf("\timm_count: %d\n", count);
88       for (int i=0; i<count; i++) {
89         int index = ins.opIndex(X86_OP_IMM, i + 1);
90         System.out.printf("\t\timms[%d]: 0x%x\n", i+1, (operands.op[index].value.imm));
91       }
92     }
93 
94     if (operands.op.length != 0) {
95       System.out.printf("\top_count: %d\n", operands.op.length);
96       for (int c=0; c<operands.op.length; c++) {
97         X86.Operand i = (X86.Operand) operands.op[c];
98         String imm = hex(i.value.imm);
99         if (i.type == X86_OP_REG)
100           System.out.printf("\t\toperands[%d].type: REG = %s\n", c, ins.regName(i.value.reg));
101         if (i.type == X86_OP_IMM)
102           System.out.printf("\t\toperands[%d].type: IMM = 0x%x\n", c, i.value.imm);
103         if (i.type == X86_OP_FP)
104           System.out.printf("\t\toperands[%d].type: FP = %f\n", c, i.value.fp);
105         if (i.type == X86_OP_MEM) {
106           System.out.printf("\t\toperands[%d].type: MEM\n",c);
107           String segment = ins.regName(i.value.mem.segment);
108           String base = ins.regName(i.value.mem.base);
109           String index = ins.regName(i.value.mem.index);
110           if (segment != null)
111             System.out.printf("\t\t\toperands[%d].mem.segment: REG = %s\n", c, segment);
112           if (base != null)
113             System.out.printf("\t\t\toperands[%d].mem.base: REG = %s\n", c, base);
114           if (index != null)
115             System.out.printf("\t\t\toperands[%d].mem.index: REG = %s\n", c, index);
116           if (i.value.mem.scale != 1)
117             System.out.printf("\t\t\toperands[%d].mem.scale: %d\n", c, i.value.mem.scale);
118           if (i.value.mem.disp != 0)
119             System.out.printf("\t\t\toperands[%d].mem.disp: 0x%x\n", c, i.value.mem.disp);
120         }
121 
122         // AVX broadcast type
123         if (i.avx_bcast != X86_AVX_BCAST_INVALID) {
124           System.out.printf("\t\toperands[%d].avx_bcast: %d\n", c, i.avx_bcast);
125         }
126 
127         // AVX zero opmask {z}
128         if (i.avx_zero_opmask) {
129           System.out.printf("\t\toperands[%d].avx_zero_opmask: TRUE\n", c);
130         }
131 
132         System.out.printf("\t\toperands[%d].size: %d\n", c, i.size);
133       }
134     }
135   }
136 
main(String argv[])137   public static void main(String argv[]) {
138 
139     final Test.platform[] all_tests = {
140       new Test.platform(Capstone.CS_ARCH_X86, Capstone.CS_MODE_16, hexString2Byte(X86_CODE16), "X86 16bit (Intel syntax)"),
141       new Test.platform(Capstone.CS_ARCH_X86, Capstone.CS_MODE_32, Capstone.CS_OPT_SYNTAX_ATT, hexString2Byte(X86_CODE32), "X86 32 (AT&T syntax)"),
142       new Test.platform(Capstone.CS_ARCH_X86, Capstone.CS_MODE_32, hexString2Byte(X86_CODE32), "X86 32 (Intel syntax)"),
143       new Test.platform(Capstone.CS_ARCH_X86, Capstone.CS_MODE_64, hexString2Byte(X86_CODE64), "X86 64 (Intel syntax)"),
144     };
145 
146     for (int i=0; i<all_tests.length; i++) {
147       Test.platform test = all_tests[i];
148       System.out.println(new String(new char[16]).replace("\0", "*"));
149       System.out.println("Platform: " + test.comment);
150       System.out.println("Code: " + Test.stringToHex(test.code));
151       System.out.println("Disasm:");
152 
153       cs = new Capstone(test.arch, test.mode);
154       cs.setDetail(Capstone.CS_OPT_ON);
155       if (test.syntax != 0) {
156         cs.setSyntax(test.syntax);
157       }
158       Capstone.CsInsn[] all_ins = cs.disasm(test.code, 0x1000);
159 
160       for (int j = 0; j < all_ins.length; j++) {
161         print_ins_detail(all_ins[j]);
162         System.out.println();
163       }
164 
165       System.out.printf("0x%x:\n\n", all_ins[all_ins.length-1].address + all_ins[all_ins.length-1].size);
166 
167       // Close when done
168       cs.close();
169     }
170   }
171 
172 }
173