// SPDX-License-Identifier: GPL-2.0 /* Copyright (c) 2022 Meta Platforms, Inc. and affiliates. */ #include "bpf_iter.h" #include <bpf/bpf_helpers.h> char _license[] SEC("license") = "GPL"; __u32 unique_tgid_cnt = 0; uintptr_t address = 0; uintptr_t offset = 0; __u32 last_tgid = 0; __u32 pid = 0; __u32 page_shift = 0; SEC("iter/task_vma") int get_vma_offset(struct bpf_iter__task_vma *ctx) { struct vm_area_struct *vma = ctx->vma; struct seq_file *seq = ctx->meta->seq; struct task_struct *task = ctx->task; if (task == NULL || vma == NULL) return 0; if (last_tgid != task->tgid) unique_tgid_cnt++; last_tgid = task->tgid; if (task->tgid != pid) return 0; if (vma->vm_start <= address && vma->vm_end > address) { offset = address - vma->vm_start + (vma->vm_pgoff << page_shift); BPF_SEQ_PRINTF(seq, "OK\n"); } return 0; }