1 /*
2  * Copyright 2023 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 #include <linux/bpf.h>
18 #include <stdbool.h>
19 #include <stdint.h>
20 #include <bpf_helpers.h>
21 
22 DEFINE_BPF_RINGBUF_EXT(output_buf, __u64, 4096, AID_UPROBESTATS, AID_UPROBESTATS, 0600, "", "",
23                        PRIVATE, BPFLOADER_MIN_VER, BPFLOADER_MAX_VER, LOAD_ON_ENG, LOAD_ON_USER,
24                        LOAD_ON_USERDEBUG);
25 
26 DEFINE_BPF_PROG("uprobe/bitmap_constructor_heap", AID_UPROBESTATS, AID_UPROBESTATS, BPF_KPROBE2)
27 (void* this_ptr, void* buffer_address, __u32 size) {
28     __u64* output = bpf_output_buf_reserve();
29     if (output == NULL) return 1;
30     (*output) = 123;
31     bpf_output_buf_submit(output);
32     return 0;
33 }
34 
35 LICENSE("GPL");
36