| // SPDX-License-Identifier: GPL-2.0 |
| |
| #include "vmlinux.h" |
| #include <bpf/bpf_helpers.h> |
| #include <bpf/bpf_tracing.h> |
| |
| #define PT_REGS_SIZE sizeof(struct pt_regs) |
| |
| /* |
| * The kernel struct pt_regs isn't exported in its entirety to userspace. |
| * Pass it as an array to task_pt_regs.c |
| */ |
| char current_regs[PT_REGS_SIZE] = {}; |
| char ctx_regs[PT_REGS_SIZE] = {}; |
| int uprobe_res = 0; |
| |
| SEC("uprobe/trigger_func") |
| int handle_uprobe(struct pt_regs *ctx) |
| { |
| struct task_struct *current; |
| struct pt_regs *regs; |
| |
| current = bpf_get_current_task_btf(); |
| regs = (struct pt_regs *) bpf_task_pt_regs(current); |
| if (bpf_probe_read_kernel(current_regs, PT_REGS_SIZE, regs)) |
| return 0; |
| if (bpf_probe_read_kernel(ctx_regs, PT_REGS_SIZE, ctx)) |
| return 0; |
| |
| /* Prove that uprobe was run */ |
| uprobe_res = 1; |
| |
| return 0; |
| } |
| |
| char _license[] SEC("license") = "GPL"; |