1 /* Capstone Disassembler Engine */
2 /* By Sebastian Macke <sebastian@macke.de>, 2018 */
3
4 #include <stdio.h>
5 #include <stdlib.h>
6
7 #include <capstone/platform.h>
8 #include <capstone/capstone.h>
9
10 struct platform {
11 cs_arch arch;
12 cs_mode mode;
13 unsigned char *code;
14 size_t size;
15 const char *comment;
16 };
17
18 static csh handle;
19
print_string_hex(const char * comment,unsigned char * str,size_t len)20 static void print_string_hex(const char *comment, unsigned char *str, size_t len)
21 {
22 unsigned char *c;
23
24 printf("%s", comment);
25 for (c = str; c < str + len; c++) {
26 printf(" 0x%02x", *c & 0xff);
27 }
28
29 printf("\n");
30 }
31
get_am_name(mos65xx_address_mode mode)32 static const char *get_am_name(mos65xx_address_mode mode)
33 {
34 switch(mode) {
35 default:
36 case MOS65XX_AM_NONE:
37 return "No address mode";
38 case MOS65XX_AM_IMP:
39 return "implied addressing (no addressing mode)";
40 case MOS65XX_AM_ACC:
41 return "accumulator addressing";
42 case MOS65XX_AM_ABS:
43 return "absolute addressing";
44 case MOS65XX_AM_ZP:
45 return "zeropage addressing";
46 case MOS65XX_AM_IMM:
47 return "8 Bit immediate value";
48 case MOS65XX_AM_ABSX:
49 return "indexed absolute addressing by the X index register";
50 case MOS65XX_AM_ABSY:
51 return "indexed absolute addressing by the Y index register";
52 case MOS65XX_AM_INDX:
53 return "indexed indirect addressing by the X index register";
54 case MOS65XX_AM_INDY:
55 return "indirect indexed addressing by the Y index register";
56 case MOS65XX_AM_ZPX:
57 return "indexed zeropage addressing by the X index register";
58 case MOS65XX_AM_ZPY:
59 return "indexed zeropage addressing by the Y index register";
60 case MOS65XX_AM_REL:
61 return "relative addressing used by branches";
62 case MOS65XX_AM_IND:
63 return "absolute indirect addressing";
64 }
65 }
66
67
print_insn_detail(cs_insn * ins)68 static void print_insn_detail(cs_insn *ins)
69 {
70 cs_mos65xx *mos65xx;
71 int i;
72
73 // detail can be NULL on "data" instruction if SKIPDATA option is turned ON
74 if (ins->detail == NULL)
75 return;
76
77 mos65xx = &(ins->detail->mos65xx);
78
79 // printf("insn_detail\n");
80 printf("\taddress mode: %s\n", get_am_name(mos65xx->am));
81 printf("\tmodifies flags: %s\n", mos65xx->modifies_flags ? "true": "false");
82
83 if (mos65xx->op_count)
84 printf("\top_count: %u\n", mos65xx->op_count);
85
86 for (i = 0; i < mos65xx->op_count; i++) {
87 cs_mos65xx_op *op = &(mos65xx->operands[i]);
88 switch((int)op->type) {
89 default:
90 break;
91 case MOS65XX_OP_REG:
92 printf("\t\toperands[%u].type: REG = %s\n", i, cs_reg_name(handle, op->reg));
93 break;
94 case MOS65XX_OP_IMM:
95 printf("\t\toperands[%u].type: IMM = 0x%x\n", i, op->imm);
96 break;
97 case MOS65XX_OP_MEM:
98 printf("\t\toperands[%u].type: MEM = 0x%x\n", i, op->mem);
99 break;
100 }
101 }
102 }
103
test()104 static void test()
105 {
106 #define MOS65XX_CODE "\x0d\x34\x12\x00\x81\x87\x6c\x01\x00\x85\xFF\x10\x00\x19\x42\x42\x00\x49\x42"
107
108 struct platform platforms[] = {
109 {
110 CS_ARCH_MOS65XX,
111 0,
112 (unsigned char *)MOS65XX_CODE,
113 sizeof(MOS65XX_CODE) - 1,
114 "MOS65XX"
115 },
116 };
117
118 uint64_t address = 0x1000;
119 cs_insn *insn;
120 int i;
121 size_t count;
122
123 for (i = 0; i < sizeof(platforms)/sizeof(platforms[0]); i++) {
124 cs_err err = cs_open(platforms[i].arch, platforms[i].mode, &handle);
125 if (err) {
126 printf("Failed on cs_open() with error returned: %u\n", err);
127 abort();
128 }
129
130 cs_option(handle, CS_OPT_DETAIL, CS_OPT_ON);
131
132 count = cs_disasm(handle, platforms[i].code, platforms[i].size, address, 0, &insn);
133
134 if (count) {
135 size_t j;
136
137 printf("****************\n");
138 printf("Platform: %s\n", platforms[i].comment);
139 print_string_hex("Code:", platforms[i].code, platforms[i].size);
140 printf("Disasm:\n");
141
142 for (j = 0; j < count; j++) {
143 printf("0x%" PRIx64 ":\t%s\t%s\n", insn[j].address, insn[j].mnemonic, insn[j].op_str);
144 print_insn_detail(&insn[j]);
145 puts("");
146 }
147 printf("0x%" PRIx64 ":\n", insn[j-1].address + insn[j-1].size);
148
149 // free memory allocated by cs_disasm()
150 cs_free(insn, count);
151 } else {
152 printf("****************\n");
153 printf("Platform: %s\n", platforms[i].comment);
154 print_string_hex("Code:", platforms[i].code, platforms[i].size);
155 printf("ERROR: Failed to disasm given code!\n");
156 abort();
157 }
158
159 printf("\n");
160
161 cs_close(&handle);
162 }
163 }
164
main()165 int main()
166 {
167 test();
168 return 0;
169 }
170