1 // SPDX-License-Identifier: GPL-2.0
2
3 #include <linux/bpf.h>
4 #include <bpf/bpf_helpers.h>
5 #include "bpf_misc.h"
6
7 #if (defined(__TARGET_ARCH_arm64) || defined(__TARGET_ARCH_x86) || \
8 (defined(__TARGET_ARCH_riscv) && __riscv_xlen == 64)) && __clang_major__ >= 18
9
10 SEC("socket")
11 __description("MOV32SX, S8")
12 __success __success_unpriv __retval(0x23)
mov32sx_s8(void)13 __naked void mov32sx_s8(void)
14 {
15 asm volatile (" \
16 w0 = 0xff23; \
17 w0 = (s8)w0; \
18 exit; \
19 " ::: __clobber_all);
20 }
21
22 SEC("socket")
23 __description("MOV32SX, S16")
24 __success __success_unpriv __retval(0xFFFFff23)
mov32sx_s16(void)25 __naked void mov32sx_s16(void)
26 {
27 asm volatile (" \
28 w0 = 0xff23; \
29 w0 = (s16)w0; \
30 exit; \
31 " ::: __clobber_all);
32 }
33
34 SEC("socket")
35 __description("MOV64SX, S8")
36 __success __success_unpriv __retval(-2)
mov64sx_s8(void)37 __naked void mov64sx_s8(void)
38 {
39 asm volatile (" \
40 r0 = 0x1fe; \
41 r0 = (s8)r0; \
42 exit; \
43 " ::: __clobber_all);
44 }
45
46 SEC("socket")
47 __description("MOV64SX, S16")
48 __success __success_unpriv __retval(0xf23)
mov64sx_s16(void)49 __naked void mov64sx_s16(void)
50 {
51 asm volatile (" \
52 r0 = 0xf0f23; \
53 r0 = (s16)r0; \
54 exit; \
55 " ::: __clobber_all);
56 }
57
58 SEC("socket")
59 __description("MOV64SX, S32")
60 __success __success_unpriv __retval(-1)
mov64sx_s32(void)61 __naked void mov64sx_s32(void)
62 {
63 asm volatile (" \
64 r0 = 0xfffffffe; \
65 r0 = (s32)r0; \
66 r0 >>= 1; \
67 exit; \
68 " ::: __clobber_all);
69 }
70
71 SEC("socket")
72 __description("MOV32SX, S8, range_check")
73 __success __success_unpriv __retval(1)
mov32sx_s8_range(void)74 __naked void mov32sx_s8_range(void)
75 {
76 asm volatile (" \
77 call %[bpf_get_prandom_u32]; \
78 w1 = (s8)w0; \
79 /* w1 with s8 range */ \
80 if w1 s> 0x7f goto l0_%=; \
81 if w1 s< -0x80 goto l0_%=; \
82 r0 = 1; \
83 l1_%=: \
84 exit; \
85 l0_%=: \
86 r0 = 2; \
87 goto l1_%=; \
88 " :
89 : __imm(bpf_get_prandom_u32)
90 : __clobber_all);
91 }
92
93 SEC("socket")
94 __description("MOV32SX, S16, range_check")
95 __success __success_unpriv __retval(1)
mov32sx_s16_range(void)96 __naked void mov32sx_s16_range(void)
97 {
98 asm volatile (" \
99 call %[bpf_get_prandom_u32]; \
100 w1 = (s16)w0; \
101 /* w1 with s16 range */ \
102 if w1 s> 0x7fff goto l0_%=; \
103 if w1 s< -0x80ff goto l0_%=; \
104 r0 = 1; \
105 l1_%=: \
106 exit; \
107 l0_%=: \
108 r0 = 2; \
109 goto l1_%=; \
110 " :
111 : __imm(bpf_get_prandom_u32)
112 : __clobber_all);
113 }
114
115 SEC("socket")
116 __description("MOV32SX, S16, range_check 2")
117 __success __success_unpriv __retval(1)
mov32sx_s16_range_2(void)118 __naked void mov32sx_s16_range_2(void)
119 {
120 asm volatile (" \
121 r1 = 65535; \
122 w2 = (s16)w1; \
123 r2 >>= 1; \
124 if r2 != 0x7fffFFFF goto l0_%=; \
125 r0 = 1; \
126 l1_%=: \
127 exit; \
128 l0_%=: \
129 r0 = 0; \
130 goto l1_%=; \
131 " :
132 : __imm(bpf_get_prandom_u32)
133 : __clobber_all);
134 }
135
136 SEC("socket")
137 __description("MOV64SX, S8, range_check")
138 __success __success_unpriv __retval(1)
mov64sx_s8_range(void)139 __naked void mov64sx_s8_range(void)
140 {
141 asm volatile (" \
142 call %[bpf_get_prandom_u32]; \
143 r1 = (s8)r0; \
144 /* r1 with s8 range */ \
145 if r1 s> 0x7f goto l0_%=; \
146 if r1 s< -0x80 goto l0_%=; \
147 r0 = 1; \
148 l1_%=: \
149 exit; \
150 l0_%=: \
151 r0 = 2; \
152 goto l1_%=; \
153 " :
154 : __imm(bpf_get_prandom_u32)
155 : __clobber_all);
156 }
157
158 SEC("socket")
159 __description("MOV64SX, S16, range_check")
160 __success __success_unpriv __retval(1)
mov64sx_s16_range(void)161 __naked void mov64sx_s16_range(void)
162 {
163 asm volatile (" \
164 call %[bpf_get_prandom_u32]; \
165 r1 = (s16)r0; \
166 /* r1 with s16 range */ \
167 if r1 s> 0x7fff goto l0_%=; \
168 if r1 s< -0x8000 goto l0_%=; \
169 r0 = 1; \
170 l1_%=: \
171 exit; \
172 l0_%=: \
173 r0 = 2; \
174 goto l1_%=; \
175 " :
176 : __imm(bpf_get_prandom_u32)
177 : __clobber_all);
178 }
179
180 SEC("socket")
181 __description("MOV64SX, S32, range_check")
182 __success __success_unpriv __retval(1)
mov64sx_s32_range(void)183 __naked void mov64sx_s32_range(void)
184 {
185 asm volatile (" \
186 call %[bpf_get_prandom_u32]; \
187 r1 = (s32)r0; \
188 /* r1 with s32 range */ \
189 if r1 s> 0x7fffffff goto l0_%=; \
190 if r1 s< -0x80000000 goto l0_%=; \
191 r0 = 1; \
192 l1_%=: \
193 exit; \
194 l0_%=: \
195 r0 = 2; \
196 goto l1_%=; \
197 " :
198 : __imm(bpf_get_prandom_u32)
199 : __clobber_all);
200 }
201
202 SEC("socket")
203 __description("MOV64SX, S16, R10 Sign Extension")
204 __failure __msg("R1 type=scalar expected=fp, pkt, pkt_meta, map_key, map_value, mem, ringbuf_mem, buf, trusted_ptr_")
205 __failure_unpriv __msg_unpriv("R10 sign-extension part of pointer")
mov64sx_s16_r10(void)206 __naked void mov64sx_s16_r10(void)
207 {
208 asm volatile (" \
209 r1 = 553656332; \
210 *(u32 *)(r10 - 8) = r1; \
211 r1 = (s16)r10; \
212 r1 += -8; \
213 r2 = 3; \
214 if r2 <= r1 goto l0_%=; \
215 l0_%=: \
216 call %[bpf_trace_printk]; \
217 r0 = 0; \
218 exit; \
219 " :
220 : __imm(bpf_trace_printk)
221 : __clobber_all);
222 }
223
224 #else
225
226 SEC("socket")
227 __description("cpuv4 is not supported by compiler or jit, use a dummy test")
228 __success
dummy_test(void)229 int dummy_test(void)
230 {
231 return 0;
232 }
233
234 #endif
235
236 char _license[] SEC("license") = "GPL";
237
