tools/testing/selftests/bpf/progs/freplace_unreliable_prog.c

Source file repositories/reference/linux-study-clean/tools/testing/selftests/bpf/progs/freplace_unreliable_prog.c

File Facts

System
Linux kernel
Corpus path
tools/testing/selftests/bpf/progs/freplace_unreliable_prog.c
Extension
.c
Size
612 bytes
Lines
21
Domain
Support Tooling And Documentation
Bucket
tools
Inferred role
Support Tooling And Documentation: implementation source
Status
source implementation candidate

Why This File Exists

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

Dependency Surface

Detected Declarations

Annotated Snippet

// SPDX-License-Identifier: GPL-2.0
// Copyright (c) 2020 Facebook

#include "vmlinux.h"
#include <bpf/bpf_helpers.h>
#include <bpf/bpf_tracing.h>

SEC("freplace/btf_unreliable_kprobe")
/* context type is what BPF verifier expects for kprobe context, but target
 * program has `stuct whatever *ctx` argument, so freplace operation will be
 * rejected with the following message:
 *
 * arg0 replace_btf_unreliable_kprobe(struct pt_regs *) doesn't match btf_unreliable_kprobe(struct whatever *)
 */
int replace_btf_unreliable_kprobe(bpf_user_pt_regs_t *ctx)
{
	return 0;
}

char _license[] SEC("license") = "GPL";

Annotation

Implementation Notes