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 13 SEC("socket") 14 __description("gotol, small_imm") 15 __success __success_unpriv __retval(1) 16 __naked void gotol_small_imm(void) 17 { 18 asm volatile (" \ 19 call %[bpf_ktime_get_ns]; \ 20 if r0 == 0 goto l0_%=; \ 21 gotol l1_%=; \ 22 l2_%=: \ 23 gotol l3_%=; \ 24 l1_%=: \ 25 r0 = 1; \ 26 gotol l2_%=; \ 27 l0_%=: \ 28 r0 = 2; \ 29 l3_%=: \ 30 exit; \ 31 " : 32 : __imm(bpf_ktime_get_ns) 33 : __clobber_all); 34 } 35 36 SEC("socket") 37 __description("gotol, large_imm") 38 __success __failure_unpriv __retval(40000) 39 __naked void gotol_large_imm(void) 40 { 41 asm volatile (" \ 42 gotol 1f; \ 43 0: \ 44 r0 = 0; \ 45 .rept 40000; \ 46 r0 += 1; \ 47 .endr; \ 48 exit; \ 49 1: gotol 0b; \ 50 " : 51 : 52 : __clobber_all); 53 } 54 55 #else 56 57 SEC("socket") 58 __description("cpuv4 is not supported by compiler or jit, use a dummy test") 59 __success 60 int dummy_test(void) 61 { 62 return 0; 63 } 64 65 #endif 66 67 char _license[] SEC("license") = "GPL"; 68