1// SPDX-License-Identifier: GPL-2.0 2/* 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