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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 | // SPDX-License-Identifier: GPL-2.0 #include <linux/bpf.h> #include <bpf/bpf_helpers.h> #include "bpf_misc.h" #if (defined(__TARGET_ARCH_arm64) || defined(__TARGET_ARCH_x86) || \ (defined(__TARGET_ARCH_riscv) && __riscv_xlen == 64) || \ defined(__TARGET_ARCH_arm) || defined(__TARGET_ARCH_s390) || \ defined(__TARGET_ARCH_loongarch)) && \ __clang_major__ >= 18 SEC("socket") __description("MOV32SX, S8") __success __success_unpriv __retval(0x23) __naked void mov32sx_s8(void) { asm volatile (" \ w0 = 0xff23; \ w0 = (s8)w0; \ exit; \ " ::: __clobber_all); } SEC("socket") __description("MOV32SX, S16") __success __success_unpriv __retval(0xFFFFff23) __naked void mov32sx_s16(void) { asm volatile (" \ w0 = 0xff23; \ w0 = (s16)w0; \ exit; \ " ::: __clobber_all); } SEC("socket") __description("MOV64SX, S8") __success __success_unpriv __retval(-2) __naked void mov64sx_s8(void) { asm volatile (" \ r0 = 0x1fe; \ r0 = (s8)r0; \ exit; \ " ::: __clobber_all); } SEC("socket") __description("MOV64SX, S16") __success __success_unpriv __retval(0xf23) __naked void mov64sx_s16(void) { asm volatile (" \ r0 = 0xf0f23; \ r0 = (s16)r0; \ exit; \ " ::: __clobber_all); } SEC("socket") __description("MOV64SX, S32") __success __success_unpriv __retval(-1) __naked void mov64sx_s32(void) { asm volatile (" \ r0 = 0xfffffffe; \ r0 = (s32)r0; \ r0 >>= 1; \ exit; \ " ::: __clobber_all); } SEC("socket") __description("MOV32SX, S8, range_check") __success __success_unpriv __retval(1) __naked void mov32sx_s8_range(void) { asm volatile (" \ call %[bpf_get_prandom_u32]; \ w1 = (s8)w0; \ /* w1 with s8 range */ \ if w1 s> 0x7f goto l0_%=; \ if w1 s< -0x80 goto l0_%=; \ r0 = 1; \ l1_%=: \ exit; \ l0_%=: \ r0 = 2; \ goto l1_%=; \ " : : __imm(bpf_get_prandom_u32) : __clobber_all); } SEC("socket") __description("MOV32SX, S16, range_check") __success __success_unpriv __retval(1) __naked void mov32sx_s16_range(void) { asm volatile (" \ call %[bpf_get_prandom_u32]; \ w1 = (s16)w0; \ /* w1 with s16 range */ \ if w1 s> 0x7fff goto l0_%=; \ if w1 s< -0x80ff goto l0_%=; \ r0 = 1; \ l1_%=: \ exit; \ l0_%=: \ r0 = 2; \ goto l1_%=; \ " : : __imm(bpf_get_prandom_u32) : __clobber_all); } SEC("socket") __description("MOV32SX, S16, range_check 2") __success __success_unpriv __retval(1) __naked void mov32sx_s16_range_2(void) { asm volatile (" \ r1 = 65535; \ w2 = (s16)w1; \ r2 >>= 1; \ if r2 != 0x7fffFFFF goto l0_%=; \ r0 = 1; \ l1_%=: \ exit; \ l0_%=: \ r0 = 0; \ goto l1_%=; \ " : : __imm(bpf_get_prandom_u32) : __clobber_all); } SEC("socket") __description("MOV64SX, S8, range_check") __success __success_unpriv __retval(1) __naked void mov64sx_s8_range(void) { asm volatile (" \ call %[bpf_get_prandom_u32]; \ r1 = (s8)r0; \ /* r1 with s8 range */ \ if r1 s> 0x7f goto l0_%=; \ if r1 s< -0x80 goto l0_%=; \ r0 = 1; \ l1_%=: \ exit; \ l0_%=: \ r0 = 2; \ goto l1_%=; \ " : : __imm(bpf_get_prandom_u32) : __clobber_all); } SEC("socket") __description("MOV64SX, S16, range_check") __success __success_unpriv __retval(1) __naked void mov64sx_s16_range(void) { asm volatile (" \ call %[bpf_get_prandom_u32]; \ r1 = (s16)r0; \ /* r1 with s16 range */ \ if r1 s> 0x7fff goto l0_%=; \ if r1 s< -0x8000 goto l0_%=; \ r0 = 1; \ l1_%=: \ exit; \ l0_%=: \ r0 = 2; \ goto l1_%=; \ " : : __imm(bpf_get_prandom_u32) : __clobber_all); } SEC("socket") __description("MOV64SX, S32, range_check") __success __success_unpriv __retval(1) __naked void mov64sx_s32_range(void) { asm volatile (" \ call %[bpf_get_prandom_u32]; \ r1 = (s32)r0; \ /* r1 with s32 range */ \ if r1 s> 0x7fffffff goto l0_%=; \ if r1 s< -0x80000000 goto l0_%=; \ r0 = 1; \ l1_%=: \ exit; \ l0_%=: \ r0 = 2; \ goto l1_%=; \ " : : __imm(bpf_get_prandom_u32) : __clobber_all); } SEC("socket") __description("MOV64SX, S16, R10 Sign Extension") __failure __msg("R1 type=scalar expected=fp, pkt, pkt_meta, map_key, map_value, mem, ringbuf_mem, buf, trusted_ptr_") __failure_unpriv __msg_unpriv("R10 sign-extension part of pointer") __naked void mov64sx_s16_r10(void) { asm volatile (" \ r1 = 553656332; \ *(u32 *)(r10 - 8) = r1; \ r1 = (s16)r10; \ r1 += -8; \ r2 = 3; \ if r2 <= r1 goto l0_%=; \ l0_%=: \ call %[bpf_trace_printk]; \ r0 = 0; \ exit; \ " : : __imm(bpf_trace_printk) : __clobber_all); } #else SEC("socket") __description("cpuv4 is not supported by compiler or jit, use a dummy test") __success int dummy_test(void) { return 0; } #endif char _license[] SEC("license") = "GPL"; |