1 /* radare2 - LGPL - Copyright 2014 - pancake */
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
nios2_op(RAnal * anal,RAnalOp * op,ut64 addr,const ut8 * b,int len,RAnalOpMask mask)9 static int nios2_op(RAnal *anal, RAnalOp *op, ut64 addr, const ut8 *b, int len, RAnalOpMask mask) {
10 if (!op) {
11 return 1;
12 }
13 op->size = 4;
14
15 if ((b[0]&0xff) == 0x3a) {
16 // XXX
17 op->type = R_ANAL_OP_TYPE_RET;
18 } else
19 if ((b[0]&0xf) == 0xa) {
20 op->type = R_ANAL_OP_TYPE_JMP;
21 } else
22 if ((b[0]&0xf) == 4) {
23 op->type = R_ANAL_OP_TYPE_ADD;
24 } else
25 if ((b[0]&0xf) == 5) {
26 op->type = R_ANAL_OP_TYPE_STORE;
27 } else
28 if ((b[0]&0xf) == 6) {
29 // blt, r19, r5, 0x8023480
30 op->type = R_ANAL_OP_TYPE_CJMP;
31 // TODO: address
32 } else
33 if ((b[0]&0xf) == 7) {
34 // blt, r19, r5, 0x8023480
35 op->type = R_ANAL_OP_TYPE_LOAD;
36 // TODO: address
37 } else {
38 switch (b[0]) {
39 case 0x3a:
40 if (b[1] >= 0xa0 && b[1] <= 0xaf && b[3] == 0x3d) {
41 op->type = R_ANAL_OP_TYPE_TRAP;
42 } else if ((b[1] >= 0xe0 && b[1] <= 0xe7) && b[2] == 0x3e && !b[3]) {
43 // nextpc ra
44 op->type = R_ANAL_OP_TYPE_RET;
45 }
46 break;
47 case 0x01:
48 // jmpi
49 op->type = R_ANAL_OP_TYPE_JMP;
50 break;
51 case 0x00:
52 case 0x20:
53 case 0x40:
54 case 0x80:
55 case 0xc0:
56 //
57 op->type = R_ANAL_OP_TYPE_CALL;
58 break;
59 case 0x26:
60 // beq
61 break;
62 case 0x07:
63 case 0x47:
64 case 0x87:
65 case 0xc7:
66 // ldb
67 op->type = R_ANAL_OP_TYPE_LOAD;
68 break;
69 case 0x0d:
70 case 0x2d:
71 case 0x4d:
72 case 0x8d:
73 case 0xcd:
74 // sth && sthio
75 op->type = R_ANAL_OP_TYPE_LOAD;
76 break;
77 case 0x06:
78 case 0x46:
79 case 0x86:
80 case 0xc6:
81 // br
82 op->type = R_ANAL_OP_TYPE_CALL;
83 break;
84 }
85 }
86 return op->size;
87 }
88
89 RAnalPlugin r_anal_plugin_nios2 = {
90 .name = "nios2",
91 .desc = "NIOS II code analysis plugin",
92 .license = "LGPL3",
93 .arch = "nios2",
94 .esil = false,
95 .bits = 32,
96 .op = &nios2_op,
97 };
98
99 #ifndef R2_PLUGIN_INCORE
100 R_API RLibStruct radare_plugin = {
101 .type = R_LIB_TYPE_ANAL,
102 .data = &r_anal_plugin_nios2,
103 .version = R2_VERSION
104 };
105 #endif
106