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1 | /* This file is part of GDB, the GNU debugger. |
2 | ||
b811d2c2 | 3 | Copyright 2018-2020 Free Software Foundation, Inc. |
6bb8890e AH |
4 | |
5 | This program is free software; you can redistribute it and/or modify | |
6 | it under the terms of the GNU General Public License as published by | |
7 | the Free Software Foundation; either version 3 of the License, or | |
8 | (at your option) any later version. | |
9 | ||
10 | This program is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | GNU General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU General Public License | |
16 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
17 | ||
18 | #include <signal.h> | |
19 | #include <unistd.h> | |
20 | #include <stdlib.h> | |
21 | ||
22 | #define OVERWRITE_GP_REGS \ | |
23 | "ldr x1, [x0]\n\t" \ | |
24 | "ldr x2, [x0]\n\t" \ | |
25 | "ldr x3, [x0]\n\t" \ | |
26 | "ldr x4, [x0]\n\t" \ | |
27 | "ldr x5, [x0]\n\t" \ | |
28 | "ldr x6, [x0]\n\t" \ | |
29 | "ldr x7, [x0]\n\t" \ | |
30 | "ldr x8, [x0]\n\t" \ | |
31 | "ldr x9, [x0]\n\t" \ | |
32 | "ldr x10, [x0]\n\t" \ | |
33 | "ldr x11, [x0]\n\t" \ | |
34 | "ldr x12, [x0]\n\t" \ | |
35 | "ldr x13, [x0]\n\t" \ | |
36 | "ldr x14, [x0]\n\t" \ | |
37 | "ldr x15, [x0]\n\t" \ | |
38 | "ldr x16, [x0]\n\t" \ | |
39 | "ldr x17, [x0]\n\t" \ | |
40 | "ldr x18, [x0]\n\t" \ | |
41 | "ldr x19, [x0]\n\t" \ | |
42 | "ldr x20, [x0]\n\t" \ | |
43 | "ldr x21, [x0]\n\t" \ | |
44 | "ldr x22, [x0]\n\t" \ | |
45 | "ldr x23, [x0]\n\t" \ | |
46 | "ldr x24, [x0]\n\t" \ | |
47 | "ldr x25, [x0]\n\t" \ | |
48 | "ldr x26, [x0]\n\t" \ | |
49 | "ldr x27, [x0]\n\t" \ | |
50 | "ldr x28, [x0]\n\t" | |
51 | ||
52 | #ifdef SVE | |
53 | #define OVERWRITE_FP_REGS \ | |
54 | "ptrue p3.s\n\t" \ | |
55 | "ld1w z0.s, p3/z, [x0]\n\t" \ | |
56 | "ld1w z1.s, p3/z, [x0]\n\t" \ | |
57 | "ld1w z2.s, p3/z, [x0]\n\t" \ | |
58 | "ld1w z3.s, p3/z, [x0]\n\t" \ | |
59 | "ld1w z4.s, p3/z, [x0]\n\t" \ | |
60 | "ld1w z5.s, p3/z, [x0]\n\t" \ | |
61 | "ld1w z6.s, p3/z, [x0]\n\t" \ | |
62 | "ld1w z7.s, p3/z, [x0]\n\t" \ | |
63 | "ld1w z8.s, p3/z, [x0]\n\t" \ | |
64 | "ld1w z9.s, p3/z, [x0]\n\t" \ | |
65 | "ld1w z10.s, p3/z, [x0]\n\t" \ | |
66 | "ld1w z11.s, p3/z, [x0]\n\t" \ | |
67 | "ld1w z12.s, p3/z, [x0]\n\t" \ | |
68 | "ld1w z13.s, p3/z, [x0]\n\t" \ | |
69 | "ld1w z14.s, p3/z, [x0]\n\t" \ | |
70 | "ld1w z15.s, p3/z, [x0]\n\t" \ | |
71 | "ld1w z16.s, p3/z, [x0]\n\t" \ | |
72 | "ld1w z17.s, p3/z, [x0]\n\t" \ | |
73 | "ld1w z18.s, p3/z, [x0]\n\t" \ | |
74 | "ld1w z19.s, p3/z, [x0]\n\t" \ | |
75 | "ld1w z20.s, p3/z, [x0]\n\t" \ | |
76 | "ld1w z21.s, p3/z, [x0]\n\t" \ | |
77 | "ld1w z22.s, p3/z, [x0]\n\t" \ | |
78 | "ld1w z23.s, p3/z, [x0]\n\t" \ | |
79 | "ld1w z24.s, p3/z, [x0]\n\t" \ | |
80 | "ld1w z25.s, p3/z, [x0]\n\t" \ | |
81 | "ld1w z26.s, p3/z, [x0]\n\t" \ | |
82 | "ld1w z27.s, p3/z, [x0]\n\t" \ | |
83 | "ld1w z28.s, p3/z, [x0]\n\t" \ | |
84 | "ld1w z29.s, p3/z, [x0]\n\t" \ | |
85 | "ld1w z30.s, p3/z, [x0]\n\t" \ | |
86 | "ld1w z31.s, p3/z, [x0]\n\t" | |
87 | #else | |
88 | #define OVERWRITE_FP_REGS \ | |
89 | "ldr q0, [x0]\n\t" \ | |
90 | "ldr q1, [x0]\n\t" \ | |
91 | "ldr q2, [x0]\n\t" \ | |
92 | "ldr q3, [x0]\n\t" \ | |
93 | "ldr q4, [x0]\n\t" \ | |
94 | "ldr q5, [x0]\n\t" \ | |
95 | "ldr q6, [x0]\n\t" \ | |
96 | "ldr q7, [x0]\n\t" \ | |
97 | "ldr q8, [x0]\n\t" \ | |
98 | "ldr q9, [x0]\n\t" \ | |
99 | "ldr q10, [x0]\n\t" \ | |
100 | "ldr q11, [x0]\n\t" \ | |
101 | "ldr q12, [x0]\n\t" \ | |
102 | "ldr q13, [x0]\n\t" \ | |
103 | "ldr q14, [x0]\n\t" \ | |
104 | "ldr q15, [x0]\n\t" \ | |
105 | "ldr q16, [x0]\n\t" \ | |
106 | "ldr q17, [x0]\n\t" \ | |
107 | "ldr q18, [x0]\n\t" \ | |
108 | "ldr q19, [x0]\n\t" \ | |
109 | "ldr q20, [x0]\n\t" \ | |
110 | "ldr q21, [x0]\n\t" \ | |
111 | "ldr q22, [x0]\n\t" \ | |
112 | "ldr q23, [x0]\n\t" \ | |
113 | "ldr q24, [x0]\n\t" \ | |
114 | "ldr q25, [x0]\n\t" \ | |
115 | "ldr q26, [x0]\n\t" \ | |
116 | "ldr q27, [x0]\n\t" \ | |
117 | "ldr q28, [x0]\n\t" \ | |
118 | "ldr q29, [x0]\n\t" \ | |
119 | "ldr q30, [x0]\n\t" \ | |
120 | "ldr q31, [x0]\n\t" | |
121 | #endif | |
122 | ||
123 | #ifdef SVE | |
124 | #define OVERWRITE_P_REGS(pattern) \ | |
125 | "ptrue p0.s, " #pattern "\n\t" \ | |
126 | "ptrue p1.s, " #pattern "\n\t" \ | |
127 | "ptrue p2.s, " #pattern "\n\t" \ | |
128 | "ptrue p3.s, " #pattern "\n\t" \ | |
129 | "ptrue p4.s, " #pattern "\n\t" \ | |
130 | "ptrue p5.s, " #pattern "\n\t" \ | |
131 | "ptrue p6.s, " #pattern "\n\t" \ | |
132 | "ptrue p7.s, " #pattern "\n\t" \ | |
133 | "ptrue p8.s, " #pattern "\n\t" \ | |
134 | "ptrue p9.s, " #pattern "\n\t" \ | |
135 | "ptrue p10.s, " #pattern "\n\t" \ | |
136 | "ptrue p11.s, " #pattern "\n\t" \ | |
137 | "ptrue p12.s, " #pattern "\n\t" \ | |
138 | "ptrue p13.s, " #pattern "\n\t" \ | |
139 | "ptrue p14.s, " #pattern "\n\t" \ | |
140 | "ptrue p15.s, " #pattern "\n\t" | |
141 | #else | |
142 | #define OVERWRITE_P_REGS(pattern) | |
143 | #endif | |
144 | ||
145 | ||
146 | void | |
147 | handler (int sig) | |
148 | { | |
149 | char buf_handler[] = {0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57, | |
150 | 0x58, 0x59, 0x5a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f}; | |
151 | ||
152 | __asm __volatile ("mov x0, %0\n\t" \ | |
153 | OVERWRITE_GP_REGS \ | |
154 | OVERWRITE_FP_REGS \ | |
155 | OVERWRITE_P_REGS(MUL3) \ | |
156 | : : "r" (buf_handler)); | |
157 | ||
158 | exit(0); | |
159 | } | |
160 | ||
161 | ||
162 | ||
163 | int | |
164 | main () | |
165 | { | |
166 | /* Ensure all the signals aren't blocked. */ | |
167 | sigset_t newset; | |
168 | sigemptyset (&newset); | |
169 | sigprocmask (SIG_SETMASK, &newset, NULL); | |
170 | ||
171 | signal (SIGILL, handler); | |
172 | ||
173 | char buf_main[] = {0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, | |
174 | 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f}; | |
175 | ||
176 | /* 0x06000000 : Cause an illegal instruction. Value undefined as per ARM | |
177 | Architecture Reference Manual ARMv8, Section C4.1. */ | |
178 | ||
179 | __asm __volatile ("mov x0, %0\n\t" \ | |
180 | OVERWRITE_GP_REGS \ | |
181 | OVERWRITE_FP_REGS \ | |
182 | OVERWRITE_P_REGS(VL1) \ | |
183 | ".inst 0x06000000" | |
184 | : : "r" (buf_main)); | |
185 | ||
186 | return 0; | |
187 | } |