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 9 pid_t target_pid = 0; 10 unsigned int vmas_seen = 0; 11 12 struct { 13 __u64 vm_start; 14 __u64 vm_end; 15 } vm_ranges[1000]; 16 17 SEC("raw_tp/sys_enter") 18 int 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 43 char _license[] SEC("license") = "GPL"; 44