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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) || \
9 defined(__TARGET_ARCH_arm) || defined(__TARGET_ARCH_s390) || \
10 defined(__TARGET_ARCH_loongarch)) && \
11 __clang_major__ >= 18
12
13SEC("socket")
14__description("MOV32SX, S8")
15__success __success_unpriv __retval(0x23)
16__naked void mov32sx_s8(void)
17{
18 asm volatile (" \
19 w0 = 0xff23; \
20 w0 = (s8)w0; \
21 exit; \
22" ::: __clobber_all);
23}
24
25SEC("socket")
26__description("MOV32SX, S16")
27__success __success_unpriv __retval(0xFFFFff23)
28__naked void mov32sx_s16(void)
29{
30 asm volatile (" \
31 w0 = 0xff23; \
32 w0 = (s16)w0; \
33 exit; \
34" ::: __clobber_all);
35}
36
37SEC("socket")
38__description("MOV64SX, S8")
39__success __success_unpriv __retval(-2)
40__naked void mov64sx_s8(void)
41{
42 asm volatile (" \
43 r0 = 0x1fe; \
44 r0 = (s8)r0; \
45 exit; \
46" ::: __clobber_all);
47}
48
49SEC("socket")
50__description("MOV64SX, S16")
51__success __success_unpriv __retval(0xf23)
52__naked void mov64sx_s16(void)
53{
54 asm volatile (" \
55 r0 = 0xf0f23; \
56 r0 = (s16)r0; \
57 exit; \
58" ::: __clobber_all);
59}
60
61SEC("socket")
62__description("MOV64SX, S32")
63__success __success_unpriv __retval(-1)
64__naked void mov64sx_s32(void)
65{
66 asm volatile (" \
67 r0 = 0xfffffffe; \
68 r0 = (s32)r0; \
69 r0 >>= 1; \
70 exit; \
71" ::: __clobber_all);
72}
73
74SEC("socket")
75__description("MOV32SX, S8, range_check")
76__success __success_unpriv __retval(1)
77__naked void mov32sx_s8_range(void)
78{
79 asm volatile (" \
80 call %[bpf_get_prandom_u32]; \
81 w1 = (s8)w0; \
82 /* w1 with s8 range */ \
83 if w1 s> 0x7f goto l0_%=; \
84 if w1 s< -0x80 goto l0_%=; \
85 r0 = 1; \
86l1_%=: \
87 exit; \
88l0_%=: \
89 r0 = 2; \
90 goto l1_%=; \
91" :
92 : __imm(bpf_get_prandom_u32)
93 : __clobber_all);
94}
95
96SEC("socket")
97__description("MOV32SX, S16, range_check")
98__success __success_unpriv __retval(1)
99__naked void mov32sx_s16_range(void)
100{
101 asm volatile (" \
102 call %[bpf_get_prandom_u32]; \
103 w1 = (s16)w0; \
104 /* w1 with s16 range */ \
105 if w1 s> 0x7fff goto l0_%=; \
106 if w1 s< -0x80ff goto l0_%=; \
107 r0 = 1; \
108l1_%=: \
109 exit; \
110l0_%=: \
111 r0 = 2; \
112 goto l1_%=; \
113" :
114 : __imm(bpf_get_prandom_u32)
115 : __clobber_all);
116}
117
118SEC("socket")
119__description("MOV32SX, S16, range_check 2")
120__success __success_unpriv __retval(1)
121__naked void mov32sx_s16_range_2(void)
122{
123 asm volatile (" \
124 r1 = 65535; \
125 w2 = (s16)w1; \
126 r2 >>= 1; \
127 if r2 != 0x7fffFFFF goto l0_%=; \
128 r0 = 1; \
129l1_%=: \
130 exit; \
131l0_%=: \
132 r0 = 0; \
133 goto l1_%=; \
134" :
135 : __imm(bpf_get_prandom_u32)
136 : __clobber_all);
137}
138
139SEC("socket")
140__description("MOV64SX, S8, range_check")
141__success __success_unpriv __retval(1)
142__naked void mov64sx_s8_range(void)
143{
144 asm volatile (" \
145 call %[bpf_get_prandom_u32]; \
146 r1 = (s8)r0; \
147 /* r1 with s8 range */ \
148 if r1 s> 0x7f goto l0_%=; \
149 if r1 s< -0x80 goto l0_%=; \
150 r0 = 1; \
151l1_%=: \
152 exit; \
153l0_%=: \
154 r0 = 2; \
155 goto l1_%=; \
156" :
157 : __imm(bpf_get_prandom_u32)
158 : __clobber_all);
159}
160
161SEC("socket")
162__description("MOV64SX, S16, range_check")
163__success __success_unpriv __retval(1)
164__naked void mov64sx_s16_range(void)
165{
166 asm volatile (" \
167 call %[bpf_get_prandom_u32]; \
168 r1 = (s16)r0; \
169 /* r1 with s16 range */ \
170 if r1 s> 0x7fff goto l0_%=; \
171 if r1 s< -0x8000 goto l0_%=; \
172 r0 = 1; \
173l1_%=: \
174 exit; \
175l0_%=: \
176 r0 = 2; \
177 goto l1_%=; \
178" :
179 : __imm(bpf_get_prandom_u32)
180 : __clobber_all);
181}
182
183SEC("socket")
184__description("MOV64SX, S32, range_check")
185__success __success_unpriv __retval(1)
186__naked void mov64sx_s32_range(void)
187{
188 asm volatile (" \
189 call %[bpf_get_prandom_u32]; \
190 r1 = (s32)r0; \
191 /* r1 with s32 range */ \
192 if r1 s> 0x7fffffff goto l0_%=; \
193 if r1 s< -0x80000000 goto l0_%=; \
194 r0 = 1; \
195l1_%=: \
196 exit; \
197l0_%=: \
198 r0 = 2; \
199 goto l1_%=; \
200" :
201 : __imm(bpf_get_prandom_u32)
202 : __clobber_all);
203}
204
205SEC("socket")
206__description("MOV64SX, S16, R10 Sign Extension")
207__failure __msg("R1 type=scalar expected=fp, pkt, pkt_meta, map_key, map_value, mem, ringbuf_mem, buf, trusted_ptr_")
208__failure_unpriv __msg_unpriv("R10 sign-extension part of pointer")
209__naked void mov64sx_s16_r10(void)
210{
211 asm volatile (" \
212 r1 = 553656332; \
213 *(u32 *)(r10 - 8) = r1; \
214 r1 = (s16)r10; \
215 r1 += -8; \
216 r2 = 3; \
217 if r2 <= r1 goto l0_%=; \
218l0_%=: \
219 call %[bpf_trace_printk]; \
220 r0 = 0; \
221 exit; \
222" :
223 : __imm(bpf_trace_printk)
224 : __clobber_all);
225}
226
227SEC("socket")
228__description("MOV32SX, S8, var_off u32_max")
229__failure __msg("infinite loop detected")
230__failure_unpriv __msg_unpriv("back-edge from insn 2 to 0")
231__naked void mov64sx_s32_varoff_1(void)
232{
233 asm volatile (" \
234l0_%=: \
235 r3 = *(u8 *)(r10 -387); \
236 w7 = (s8)w3; \
237 if w7 >= 0x2533823b goto l0_%=; \
238 w0 = 0; \
239 exit; \
240" :
241 :
242 : __clobber_all);
243}
244
245SEC("socket")
246__description("MOV32SX, S8, var_off not u32_max, positive after s8 extension")
247__success __retval(0)
248__failure_unpriv __msg_unpriv("frame pointer is read only")
249__naked void mov64sx_s32_varoff_2(void)
250{
251 asm volatile (" \
252 call %[bpf_get_prandom_u32]; \
253 r3 = r0; \
254 r3 &= 0xf; \
255 w7 = (s8)w3; \
256 if w7 s>= 16 goto l0_%=; \
257 w0 = 0; \
258 exit; \
259l0_%=: \
260 r10 = 1; \
261 exit; \
262" :
263 : __imm(bpf_get_prandom_u32)
264 : __clobber_all);
265}
266
267SEC("socket")
268__description("MOV32SX, S8, var_off not u32_max, negative after s8 extension")
269__success __retval(0)
270__failure_unpriv __msg_unpriv("frame pointer is read only")
271__naked void mov64sx_s32_varoff_3(void)
272{
273 asm volatile (" \
274 call %[bpf_get_prandom_u32]; \
275 r3 = r0; \
276 r3 &= 0xf; \
277 r3 |= 0x80; \
278 w7 = (s8)w3; \
279 if w7 s>= -5 goto l0_%=; \
280 w0 = 0; \
281 exit; \
282l0_%=: \
283 r10 = 1; \
284 exit; \
285" :
286 : __imm(bpf_get_prandom_u32)
287 : __clobber_all);
288}
289
290SEC("socket")
291__description("MOV64SX, S8, unsigned range_check")
292__success __retval(0)
293__naked void mov64sx_s8_range_check(void)
294{
295 asm volatile (" \
296 call %[bpf_get_prandom_u32]; \
297 r0 &= 0x1; \
298 r0 += 0xfe; \
299 r0 = (s8)r0; \
300 if r0 < 0xfffffffffffffffe goto label_%=; \
301 r0 = 0; \
302 exit; \
303label_%=: \
304 exit; \
305" :
306 : __imm(bpf_get_prandom_u32)
307 : __clobber_all);
308}
309
310SEC("socket")
311__description("MOV32SX, S8, unsigned range_check")
312__success __retval(0)
313__naked void mov32sx_s8_range_check(void)
314{
315 asm volatile (" \
316 call %[bpf_get_prandom_u32]; \
317 w0 &= 0x1; \
318 w0 += 0xfe; \
319 w0 = (s8)w0; \
320 if w0 < 0xfffffffe goto label_%=; \
321 r0 = 0; \
322 exit; \
323label_%=: \
324 exit; \
325 " :
326 : __imm(bpf_get_prandom_u32)
327 : __clobber_all);
328}
329
330#else
331
332SEC("socket")
333__description("cpuv4 is not supported by compiler or jit, use a dummy test")
334__success
335int dummy_test(void)
336{
337 return 0;
338}
339
340#endif
341
342char _license[] SEC("license") = "GPL";