44 lines · c
1// SPDX-License-Identifier: GPL-2.02/* Copyright (c) 2023 Meta Platforms, Inc. and affiliates. */3 4#include "vmlinux.h"5#include "bpf_experimental.h"6#include <bpf/bpf_helpers.h>7#include "bpf_misc.h"8 9pid_t target_pid = 0;10unsigned int vmas_seen = 0;11 12struct {13 __u64 vm_start;14 __u64 vm_end;15} vm_ranges[1000];16 17SEC("raw_tp/sys_enter")18int iter_task_vma_for_each(const void *ctx)19{20 struct task_struct *task = bpf_get_current_task_btf();21 struct vm_area_struct *vma;22 unsigned int seen = 0;23 24 if (task->pid != target_pid)25 return 0;26 27 if (vmas_seen)28 return 0;29 30 bpf_for_each(task_vma, vma, task, 0) {31 if (bpf_cmp_unlikely(seen, >=, 1000))32 break;33 34 vm_ranges[seen].vm_start = vma->vm_start;35 vm_ranges[seen].vm_end = vma->vm_end;36 seen++;37 }38 39 vmas_seen = seen;40 return 0;41}42 43char _license[] SEC("license") = "GPL";44