1 // SPDX-License-Identifier: GPL-2.0 2 #include "vmlinux.h" 3 #include <bpf/bpf_helpers.h> 4 #include <bpf/bpf_tracing.h> 5 6 char _license[] SEC("license") = "GPL"; 7 8 #if defined(__TARGET_ARCH_x86) 9 SEC("kprobe") 10 int kprobe_write_ctx(struct pt_regs *ctx) 11 { 12 ctx->ax = 0; 13 return 0; 14 } 15 16 SEC("kprobe.multi") 17 int kprobe_multi_write_ctx(struct pt_regs *ctx) 18 { 19 ctx->ax = 0; 20 return 0; 21 } 22 23 SEC("?kprobe") 24 int kprobe_dummy(struct pt_regs *regs) 25 { 26 return 0; 27 } 28 29 SEC("?freplace") 30 int freplace_kprobe(struct pt_regs *regs) 31 { 32 regs->di = 0; 33 return 0; 34 } 35 36 SEC("?fentry/bpf_fentry_test1") 37 int BPF_PROG(fentry) 38 { 39 return 0; 40 } 41 #endif 42