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// SPDX-License-Identifier: GPL-2.0
/* Copyright (c) 2020 Google */
#include "vmlinux.h"
#include <bpf/bpf_helpers.h>
__u64 out__runqueues_addr = -1;
__u64 out__bpf_prog_active_addr = -1;
__u32 out__rq_cpu = -1; /* percpu struct fields */
int out__bpf_prog_active = -1; /* percpu int */
__u32 out__this_rq_cpu = -1;
int out__this_bpf_prog_active = -1;
__u32 out__cpu_0_rq_cpu = -1; /* cpu_rq(0)->cpu */
extern const struct rq runqueues __ksym; /* struct type global var. */
extern const int bpf_prog_active __ksym; /* int type global var. */
SEC("raw_tp/sys_enter")
int handler(const void *ctx)
{
struct rq *rq;
int *active;
__u32 cpu;
out__runqueues_addr = (__u64)&runqueues;
out__bpf_prog_active_addr = (__u64)&bpf_prog_active;
cpu = bpf_get_smp_processor_id();
/* test bpf_per_cpu_ptr() */
rq = (struct rq *)bpf_per_cpu_ptr(&runqueues, cpu);
if (rq)
out__rq_cpu = rq->cpu;
active = (int *)bpf_per_cpu_ptr(&bpf_prog_active, cpu);
if (active)
out__bpf_prog_active = *active;
rq = (struct rq *)bpf_per_cpu_ptr(&runqueues, 0);
if (rq) /* should always be valid, but we can't spare the check. */
out__cpu_0_rq_cpu = rq->cpu;
/* test bpf_this_cpu_ptr */
rq = (struct rq *)bpf_this_cpu_ptr(&runqueues);
out__this_rq_cpu = rq->cpu;
active = (int *)bpf_this_cpu_ptr(&bpf_prog_active);
out__this_bpf_prog_active = *active;
return 0;
}
char _license[] SEC("license") = "GPL";
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