1 /* radare - LGPL - Copyright 2015 - condret */
2
3 #include <string.h>
4 #include <r_types.h>
5 #include <r_lib.h>
6 #include <r_asm.h>
7 #include <r_anal.h>
8 #include "../../asm/arch/snes/snes_op_table.h"
9 #include "../../asm/p/asm_snes.h"
10
11 static struct snes_asm_flags* snesflags = NULL;
12
snes_anop(RAnal * anal,RAnalOp * op,ut64 addr,const ut8 * data,int len,RAnalOpMask mask)13 static int snes_anop(RAnal *anal, RAnalOp *op, ut64 addr, const ut8 *data, int len, RAnalOpMask mask) {
14 op->size = snes_op_get_size(snesflags->M, snesflags->X, &snes_op[data[0]]);
15 if (op->size > len) {
16 return op->size = 0;
17 }
18 op->nopcode = 1;
19 op->addr = addr;
20 op->type = R_ANAL_OP_TYPE_UNK;
21 switch (data[0]) {
22 case 0xea: // nop
23 op->type = R_ANAL_OP_TYPE_NOP;
24 break;
25 case 0xfb: // xce
26 op->type = R_ANAL_OP_TYPE_XCHG;
27 break;
28 case 0x00: // brk
29 case 0x02: // cop
30 op->type = R_ANAL_OP_TYPE_SWI;
31 break;
32 case 0x1b: // tcs
33 case 0x3b: // tsc
34 case 0x5b: // tcd
35 case 0x7b: // tdc
36 case 0x8a: // txa
37 case 0x98: // tya
38 case 0x9a: // txs
39 case 0x9b: // txy
40 case 0xa8: // tay
41 case 0xaa: // tax
42 case 0xba: // tsx
43 case 0xbb: // tyx
44 op->type = R_ANAL_OP_TYPE_MOV;
45 break;
46 case 0x48: // pha
47 case 0x8b: // phb
48 case 0x0b: // phd
49 case 0x4b: // phk
50 case 0x08: // php
51 case 0xda: // phx
52 case 0x5a: // phy
53 op->type = R_ANAL_OP_TYPE_PUSH;
54 break;
55 case 0x68: // pla
56 case 0xab: // plb
57 case 0x2b: // pld
58 case 0x28: // plp
59 case 0xfa: // plx
60 case 0x7a: // ply
61 op->type = R_ANAL_OP_TYPE_POP;
62 break;
63 // adc
64 case 0x61: case 0x63: case 0x65: case 0x67: case 0x69: case 0x6d:
65 case 0x6f: case 0x71: case 0x72: case 0x73: case 0x75: case 0x77:
66 case 0x79: case 0x7d: case 0x7f:
67 // inc
68 case 0x1a: case 0xe6: case 0xee: case 0xf6: case 0xfe:
69 case 0xe8: // inx
70 case 0xc8: // iny
71 op->type = R_ANAL_OP_TYPE_ADD;
72 break;
73 // and
74 case 0x23: case 0x25: case 0x27: case 0x29: case 0x2d: case 0x2f:
75 case 0x31: case 0x32: case 0x33: case 0x35: case 0x37: case 0x39:
76 case 0x3d: case 0x3f:
77 op->type = R_ANAL_OP_TYPE_AND;
78 break;
79 // bit
80 case 0x24: case 0x2c: case 0x34: case 0x3c: case 0x89:
81 op->type = R_ANAL_OP_TYPE_ACMP;
82 break;
83 // cmp
84 case 0xc1: case 0xc3: case 0xc5: case 0xc7: case 0xc9: case 0xcd:
85 case 0xcf: case 0xd1: case 0xd2: case 0xd3: case 0xd5: case 0xd7:
86 case 0xd9: case 0xdd: case 0xdf:
87 // cpx
88 case 0xe0: case 0xe4: case 0xec:
89 // cpy
90 case 0xc0: case 0xc4: case 0xcc:
91 op->type = R_ANAL_OP_TYPE_CMP;
92 break;
93 // ora
94 case 0x01: case 0x03: case 0x05: case 0x07: case 0x09: case 0x0d:
95 case 0x0f: case 0x11: case 0x12: case 0x13: case 0x15: case 0x17:
96 case 0x19: case 0x1d: case 0x1f:
97 op->type = R_ANAL_OP_TYPE_OR;
98 break;
99 // eor
100 case 0x41: case 0x43: case 0x45: case 0x47: case 0x49: case 0x4d:
101 case 0x4f: case 0x51: case 0x52: case 0x53: case 0x55: case 0x57:
102 case 0x59: case 0x5d: case 0x5f:
103 op->type = R_ANAL_OP_TYPE_XOR;
104 break;
105 // asl
106 case 0x06: case 0x0a: case 0x0e: case 0x16: case 0x1e:
107 op->type = R_ANAL_OP_TYPE_SAL;
108 break;
109 // lsr
110 case 0x46: case 0x4a: case 0x4e: case 0x56: case 0x5e:
111 op->type = R_ANAL_OP_TYPE_SHR;
112 break;
113 // rol
114 case 0x26: case 0x2a: case 0x2e: case 0x36: case 0x3e:
115 op->type = R_ANAL_OP_TYPE_ROL;
116 break;
117 // ror
118 case 0x66: case 0x6a: case 0x6e: case 0x76: case 0x7e:
119 op->type = R_ANAL_OP_TYPE_ROR;
120 break;
121 // sbc
122 case 0xe1: case 0xe3: case 0xe5: case 0xe7: case 0xe9: case 0xed:
123 case 0xef: case 0xf1: case 0xf2: case 0xf3: case 0xf5: case 0xf7:
124 case 0xf9: case 0xfd: case 0xff:
125 // dec
126 case 0x3a: case 0xc6: case 0xce: case 0xd6: case 0xde:
127 case 0xca: // dex
128 case 0x88: // dey
129 op->type = R_ANAL_OP_TYPE_SUB;
130 break;
131 // sta
132 case 0x81: case 0x83: case 0x85: case 0x87: case 0x8d: case 0x8f:
133 case 0x91: case 0x92: case 0x93: case 0x95: case 0x97: case 0x99:
134 case 0x9d: case 0x9f:
135 // stx
136 case 0x86: case 0x8e: case 0x96:
137 // sty
138 case 0x84: case 0x8c: case 0x94:
139 // stz
140 case 0x64: case 0x74: case 0x9c: case 0x9e:
141 op->type = R_ANAL_OP_TYPE_STORE;
142 break;
143 // lda
144 case 0xa1: case 0xa3: case 0xa5: case 0xa7: case 0xa9: case 0xad:
145 case 0xaf: case 0xb1: case 0xb2: case 0xb3: case 0xb5: case 0xb7:
146 case 0xb9: case 0xbd: case 0xbf:
147 // ldx
148 case 0xa2: case 0xa6: case 0xae: case 0xb6: case 0xbe:
149 // ldy
150 case 0xa0: case 0xa4: case 0xac: case 0xb4: case 0xbc:
151 op->type = R_ANAL_OP_TYPE_LOAD;
152 break;
153 case 0x4c: // jmp addr
154 op->eob = true;
155 op->jump = (addr & 0xFF0000) | ut8p_bw (data + 1);
156 op->type = R_ANAL_OP_TYPE_JMP;
157 break;
158 case 0x5c: // jmp long
159 op->eob = true;
160 op->jump = data[1] | data[2] << 8 | data[3] << 16;
161 op->type = R_ANAL_OP_TYPE_JMP;
162 break;
163 case 0x80: // bra
164 op->eob = true;
165 op->jump = addr + 2 + (st8)data[1];
166 op->type = R_ANAL_OP_TYPE_JMP;
167 break;
168 case 0x82: // brl
169 op->eob = true;
170 op->jump = addr + 3 + (st16)ut8p_bw (data + 1);
171 op->type = R_ANAL_OP_TYPE_JMP;
172 break;
173 case 0x6c: // jmp (addr)
174 case 0x7c: // jmp (addr,X)
175 case 0xdc: // jmp [addr]
176 op->eob = true;
177 op->type = R_ANAL_OP_TYPE_UJMP;
178 break;
179 case 0x10: // bpl
180 case 0x30: // bmi
181 case 0x50: // bvc
182 case 0x70: // bvs
183 case 0x90: // bcc
184 case 0xb0: // bcs
185 op->eob = true;
186 op->jump = addr + 2 + (st8)data[1];
187 op->fail = addr + 2;
188 op->type = R_ANAL_OP_TYPE_CJMP;
189 break;
190 case 0xd0: // bne
191 op->eob = true;
192 op->cond = R_ANAL_COND_NE;
193 op->jump = addr + 2 + (st8)data[1];
194 op->fail = addr + 2;
195 op->type = R_ANAL_OP_TYPE_CJMP;
196 break;
197 case 0xf0: // beq
198 op->eob = true;
199 op->cond = R_ANAL_COND_EQ;
200 op->jump = addr + 2 + (st8)data[1];
201 op->fail = addr + 2;
202 op->type = R_ANAL_OP_TYPE_CJMP;
203 break;
204 case 0x20: // jsr addr
205 op->jump = (addr & 0xFF0000) | ut8p_bw (data+1);
206 op->type = R_ANAL_OP_TYPE_CALL;
207 break;
208 case 0x22: // jsr long
209 op->jump = data[1] | data[2] << 8 | data[3] << 16;
210 op->type = R_ANAL_OP_TYPE_CALL;
211 break;
212 case 0xfc: // jsr (addr,X)
213 op->type = R_ANAL_OP_TYPE_UCALL;
214 break;
215 case 0x40: // rti
216 case 0x60: // rts
217 case 0x6b: // rtl
218 op->eob = true;
219 op->type = R_ANAL_OP_TYPE_RET;
220 break;
221 case 0xc2: // rep
222 if (((st8)data[1]) & 0x10) {
223 snesflags->X = 0;
224 }
225 if (((st8)data[1]) & 0x20) {
226 snesflags->M = 0;
227 }
228 break;
229 case 0xe2: // sep
230 if (((st8)data[1]) & 0x10) {
231 snesflags->X = 1;
232 }
233 if (((st8)data[1]) & 0x20) {
234 snesflags->M = 1;
235 }
236 break;
237 }
238 return op->size;
239 }
240
snes_anal_init(void * user)241 static int snes_anal_init (void* user) {
242 if (!snesflags) {
243 snesflags = malloc (sizeof (struct snes_asm_flags));
244 }
245 memset(snesflags,0,sizeof (struct snes_asm_flags));
246 return 0;
247 }
248
snes_anal_fini(void * user)249 static int snes_anal_fini (void* user) {
250 free(snesflags);
251 snesflags = NULL;
252 return 0;
253 }
254
255 RAnalPlugin r_anal_plugin_snes = {
256 .name = "snes",
257 .desc = "SNES analysis plugin",
258 .license = "LGPL3",
259 .arch = "snes",
260 .bits = 16,
261 .init = snes_anal_init,
262 .fini = snes_anal_fini,
263 .op = &snes_anop,
264 };
265
266 #ifndef R2_PLUGIN_INCORE
267 R_API RLibStruct radare_plugin = {
268 .type = R_LIB_TYPE_ANAL,
269 .data = &r_anal_plugin_snes,
270 .version = R2_VERSION
271 };
272 #endif
273