1 /* Capstone Disassembly Engine */
2 /* TMS320C64x Backend by Fotis Loukos <me@fotisl.com> 2016 */
3
4 #include <stdio.h>
5
6 #include <capstone/capstone.h>
7
8 struct platform {
9 cs_arch arch;
10 cs_mode mode;
11 unsigned char *code;
12 size_t size;
13 const char *comment;
14 };
15
16 static csh handle;
17
print_string_hex(const char * comment,unsigned char * str,size_t len)18 static void print_string_hex(const char *comment, unsigned char *str, size_t len)
19 {
20 unsigned char *c;
21
22 printf("%s", comment);
23 for (c = str; c < str + len; c++) {
24 printf("0x%02x ", *c & 0xff);
25 }
26
27 printf("\n");
28 }
29
print_insn_detail(cs_insn * ins)30 static void print_insn_detail(cs_insn *ins)
31 {
32 cs_tms320c64x *tms320c64x;
33 int i;
34
35 // detail can be NULL on "data" instruction if SKIPDATA option is turned ON
36 if (ins->detail == NULL)
37 return;
38
39 tms320c64x = &(ins->detail->tms320c64x);
40 if (tms320c64x->op_count)
41 printf("\top_count: %u\n", tms320c64x->op_count);
42
43 for (i = 0; i < tms320c64x->op_count; i++) {
44 cs_tms320c64x_op *op = &(tms320c64x->operands[i]);
45 switch((int)op->type) {
46 default:
47 break;
48 case TMS320C64X_OP_REG:
49 printf("\t\toperands[%u].type: REG = %s\n", i, cs_reg_name(handle, op->reg));
50 break;
51 case TMS320C64X_OP_IMM:
52 printf("\t\toperands[%u].type: IMM = 0x%x\n", i, op->imm);
53 break;
54 case TMS320C64X_OP_MEM:
55 printf("\t\toperands[%u].type: MEM\n", i);
56 if (op->mem.base != TMS320C64X_REG_INVALID)
57 printf("\t\t\toperands[%u].mem.base: REG = %s\n",
58 i, cs_reg_name(handle, op->mem.base));
59 printf("\t\t\toperands[%u].mem.disptype: ", i);
60 if(op->mem.disptype == TMS320C64X_MEM_DISP_INVALID) {
61 printf("Invalid\n");
62 printf("\t\t\toperands[%u].mem.disp: %u\n", i, op->mem.disp);
63 }
64 if(op->mem.disptype == TMS320C64X_MEM_DISP_CONSTANT) {
65 printf("Constant\n");
66 printf("\t\t\toperands[%u].mem.disp: %u\n", i, op->mem.disp);
67 }
68 if(op->mem.disptype == TMS320C64X_MEM_DISP_REGISTER) {
69 printf("Register\n");
70 printf("\t\t\toperands[%u].mem.disp: %s\n", i, cs_reg_name(handle, op->mem.disp));
71 }
72 printf("\t\t\toperands[%u].mem.unit: %u\n", i, op->mem.unit);
73 printf("\t\t\toperands[%u].mem.direction: ", i);
74 if(op->mem.direction == TMS320C64X_MEM_DIR_INVALID)
75 printf("Invalid\n");
76 if(op->mem.direction == TMS320C64X_MEM_DIR_FW)
77 printf("Forward\n");
78 if(op->mem.direction == TMS320C64X_MEM_DIR_BW)
79 printf("Backward\n");
80 printf("\t\t\toperands[%u].mem.modify: ", i);
81 if(op->mem.modify == TMS320C64X_MEM_MOD_INVALID)
82 printf("Invalid\n");
83 if(op->mem.modify == TMS320C64X_MEM_MOD_NO)
84 printf("No\n");
85 if(op->mem.modify == TMS320C64X_MEM_MOD_PRE)
86 printf("Pre\n");
87 if(op->mem.modify == TMS320C64X_MEM_MOD_POST)
88 printf("Post\n");
89 printf("\t\t\toperands[%u].mem.scaled: %u\n", i, op->mem.scaled);
90
91
92 break;
93 case TMS320C64X_OP_REGPAIR:
94 printf("\t\toperands[%u].type: REGPAIR = %s:%s\n", i, cs_reg_name(handle, op->reg + 1), cs_reg_name(handle, op->reg));
95 break;
96 }
97 }
98
99 printf("\tFunctional unit: ");
100 switch(tms320c64x->funit.unit) {
101 case TMS320C64X_FUNIT_D:
102 printf("D%u\n", tms320c64x->funit.side);
103 break;
104 case TMS320C64X_FUNIT_L:
105 printf("L%u\n", tms320c64x->funit.side);
106 break;
107 case TMS320C64X_FUNIT_M:
108 printf("M%u\n", tms320c64x->funit.side);
109 break;
110 case TMS320C64X_FUNIT_S:
111 printf("S%u\n", tms320c64x->funit.side);
112 break;
113 case TMS320C64X_FUNIT_NO:
114 printf("No Functional Unit\n");
115 break;
116 default:
117 printf("Unknown (Unit %u, Side %u)\n", tms320c64x->funit.unit, tms320c64x->funit.side);
118 break;
119 }
120 if(tms320c64x->funit.crosspath == 1)
121 printf("\tCrosspath: 1\n");
122
123 if(tms320c64x->condition.reg != TMS320C64X_REG_INVALID)
124 printf("\tCondition: [%c%s]\n", (tms320c64x->condition.zero == 1) ? '!' : ' ', cs_reg_name(handle, tms320c64x->condition.reg));
125 printf("\tParallel: %s\n", (tms320c64x->parallel == 1) ? "true" : "false");
126
127 printf("\n");
128 }
129
test()130 static void test()
131 {
132 #define TMS320C64X_CODE "\x01\xac\x88\x40\x81\xac\x88\x43\x00\x00\x00\x00\x02\x90\x32\x96\x02\x80\x46\x9e\x05\x3c\x83\xe6\x0b\x0c\x8b\x24"
133
134 struct platform platforms[] = {
135 {
136 CS_ARCH_TMS320C64X,
137 CS_MODE_BIG_ENDIAN,
138 (unsigned char*)TMS320C64X_CODE,
139 sizeof(TMS320C64X_CODE) - 1,
140 "TMS320C64x",
141 },
142 };
143
144 uint64_t address = 0x1000;
145 cs_insn *insn;
146 int i;
147 size_t count;
148
149 for (i = 0; i < sizeof(platforms)/sizeof(platforms[0]); i++) {
150 cs_err err = cs_open(platforms[i].arch, platforms[i].mode, &handle);
151 if (err) {
152 printf("Failed on cs_open() with error returned: %u\n", err);
153 continue;
154 }
155
156 cs_option(handle, CS_OPT_DETAIL, CS_OPT_ON);
157
158 count = cs_disasm(handle, platforms[i].code, platforms[i].size, address, 0, &insn);
159 if (count) {
160 size_t j;
161
162 printf("****************\n");
163 printf("Platform: %s\n", platforms[i].comment);
164 print_string_hex("Code:", platforms[i].code, platforms[i].size);
165 printf("Disasm:\n");
166
167 for (j = 0; j < count; j++) {
168 printf("0x%"PRIx64":\t%s\t%s\n", insn[j].address, insn[j].mnemonic, insn[j].op_str);
169 print_insn_detail(&insn[j]);
170 }
171 printf("0x%"PRIx64":\n", insn[j-1].address + insn[j-1].size);
172
173 // free memory allocated by cs_disasm()
174 cs_free(insn, count);
175 } else {
176 printf("****************\n");
177 printf("Platform: %s\n", platforms[i].comment);
178 print_string_hex("Code:", platforms[i].code, platforms[i].size);
179 printf("ERROR: Failed to disasm given code!\n");
180 }
181
182 printf("\n");
183
184 cs_close(&handle);
185 }
186 }
187
main()188 int main()
189 {
190 test();
191
192 return 0;
193 }
194