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("LDSX, S8") 12 __success __success_unpriv __retval(-2) 13 __naked void ldsx_s8(void) 14 { 15 asm volatile (" \ 16 r1 = 0x3fe; \ 17 *(u64 *)(r10 - 8) = r1; \ 18 r0 = *(s8 *)(r10 - 8); \ 19 exit; \ 20 " ::: __clobber_all); 21 } 22 23 SEC("socket") 24 __description("LDSX, S16") 25 __success __success_unpriv __retval(-2) 26 __naked void ldsx_s16(void) 27 { 28 asm volatile (" \ 29 r1 = 0x3fffe; \ 30 *(u64 *)(r10 - 8) = r1; \ 31 r0 = *(s16 *)(r10 - 8); \ 32 exit; \ 33 " ::: __clobber_all); 34 } 35 36 SEC("socket") 37 __description("LDSX, S32") 38 __success __success_unpriv __retval(-1) 39 __naked void ldsx_s32(void) 40 { 41 asm volatile (" \ 42 r1 = 0xfffffffe; \ 43 *(u64 *)(r10 - 8) = r1; \ 44 r0 = *(s32 *)(r10 - 8); \ 45 r0 >>= 1; \ 46 exit; \ 47 " ::: __clobber_all); 48 } 49 50 SEC("socket") 51 __description("LDSX, S8 range checking, privileged") 52 __log_level(2) __success __retval(1) 53 __msg("R1_w=scalar(smin=-128,smax=127)") 54 __naked void ldsx_s8_range_priv(void) 55 { 56 asm volatile (" \ 57 call %[bpf_get_prandom_u32]; \ 58 *(u64 *)(r10 - 8) = r0; \ 59 r1 = *(s8 *)(r10 - 8); \ 60 /* r1 with s8 range */ \ 61 if r1 s> 0x7f goto l0_%=; \ 62 if r1 s< -0x80 goto l0_%=; \ 63 r0 = 1; \ 64 l1_%=: \ 65 exit; \ 66 l0_%=: \ 67 r0 = 2; \ 68 goto l1_%=; \ 69 " : 70 : __imm(bpf_get_prandom_u32) 71 : __clobber_all); 72 } 73 74 SEC("socket") 75 __description("LDSX, S16 range checking") 76 __success __success_unpriv __retval(1) 77 __naked void ldsx_s16_range(void) 78 { 79 asm volatile (" \ 80 call %[bpf_get_prandom_u32]; \ 81 *(u64 *)(r10 - 8) = r0; \ 82 r1 = *(s16 *)(r10 - 8); \ 83 /* r1 with s16 range */ \ 84 if r1 s> 0x7fff goto l0_%=; \ 85 if r1 s< -0x8000 goto l0_%=; \ 86 r0 = 1; \ 87 l1_%=: \ 88 exit; \ 89 l0_%=: \ 90 r0 = 2; \ 91 goto l1_%=; \ 92 " : 93 : __imm(bpf_get_prandom_u32) 94 : __clobber_all); 95 } 96 97 SEC("socket") 98 __description("LDSX, S32 range checking") 99 __success __success_unpriv __retval(1) 100 __naked void ldsx_s32_range(void) 101 { 102 asm volatile (" \ 103 call %[bpf_get_prandom_u32]; \ 104 *(u64 *)(r10 - 8) = r0; \ 105 r1 = *(s32 *)(r10 - 8); \ 106 /* r1 with s16 range */ \ 107 if r1 s> 0x7fffFFFF goto l0_%=; \ 108 if r1 s< -0x80000000 goto l0_%=; \ 109 r0 = 1; \ 110 l1_%=: \ 111 exit; \ 112 l0_%=: \ 113 r0 = 2; \ 114 goto l1_%=; \ 115 " : 116 : __imm(bpf_get_prandom_u32) 117 : __clobber_all); 118 } 119 120 #else 121 122 SEC("socket") 123 __description("cpuv4 is not supported by compiler or jit, use a dummy test") 124 __success 125 int dummy_test(void) 126 { 127 return 0; 128 } 129 130 #endif 131 132 char _license[] SEC("license") = "GPL"; 133