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