https://github.com/jiahuann/libbpf-bootstrap-android

Do something to fit android aarch64 to develop ebpf programs using libbpf-bootstrap framework
https://github.com/jiahuann/libbpf-bootstrap-android

Last synced: about 2 months ago
JSON representation

Do something to fit android aarch64 to develop ebpf programs using libbpf-bootstrap framework

• Host: GitHub
• URL: https://github.com/jiahuann/libbpf-bootstrap-android
• Owner: JiaHuann
• License: bsd-3-clause
• Created: 2023-08-28T13:08:28.000Z (over 1 year ago)
• Default Branch: main
• Last Pushed: 2023-09-14T06:54:55.000Z (over 1 year ago)
• Last Synced: 2024-04-21T09:04:33.108Z (9 months ago)
• Language: C
• Size: 23.2 MB
• Stars: 29
• Watchers: 1
• Forks: 4
• Open Issues: 1
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

Awesome Lists containing this project

README

        
---

layout: post

title: libbpf-bootstrap-android

date: 2023-9-14 16:18

category: Framework

author: JiaHuann

tags: [Android, ebpf-framework, cross-compile]

summary: For amd64 aarch machine to directly using libbpf-bootstrap framwork to write ebpf programs both kernel and user space.And you don't need to have `CONFIG_BTF_DEBUG_INFO` support by using externel BTF file in BTFhubForAndroid instead.For this goal,I did some changes on libbpf-bootstrap,and have done some embedded features.Wish this can help you sth.Best regards. 

---

# Libbpf-bootstrap for android

> For amd64 aarch machine to directly using libbpf-bootstrap framwork to write ebpf programs both kernel and user space.And you don't need to have `CONFIG_BTF_DEBUG_INFO` support by using externel BTF file in BTFhubForAndroid instead.For this goal,I did some changes on libbpf-bootstrap,and have done some embedded features.Wish this can help you sth.Best regards. 

## upstream: 

- https://github.com/libbpf/libbpf-bootstrap

- https://github.com/SeeFlowerX/BTFHubForAndroid

## prerare

- Android NDK

- gcc-aarch64-linux-gnu

- Android phone with root and unlock BL

## usage

- deps

```shell

https://github.com/JiaHuann/libbpf-bootstrap-android

cd libbpf-bootstrap-android

sudo apt install gcc-aarch64-linux-gnu llvm clang 

wget https://dl.google.com/android/repository/android-ndk-r25c-linux.zip?hl=zh-cn android-ndk-r25c-linux.zip

unzip android-ndk-r25c-linux

```

- set NDK env to `$PATH`

```shell

vim ~/.bashrc

export your android-ndk-r25c/toolchains/llvm/prebuilt/linux-x86_64/bin to PATH

```

- compile and push to phone 

```

cd examples/c && make

adb devices

adb remount     # may fail, you can leave with issure.

adb push examples/c/btf_file/* example/c/your_executable_file /data/local/tmp

adb shell    #into android kernel shell

```

- in android shell

```shell

cd /data/local/tmp && chmod +x your_excutable_file

./run

Congratulations!

```

# feature

- libelf,libz on aarcj64 embedded.

- x86 -> android13(aarch64) cross-compile you can directly write ebpf both kernel-program and user-program on x86 machine.

- FlameGraph embedded to monitor performance.

- For None BTF/vmlinux android-kernel(CONFIG_DEBUG_INFO_BTF not set) support.

- adb debug (after compiling&linking, directly push into android-phone) embedded.

# RoadMap:

- change the static link to ShareLib.

- Measure the eBPF program's overhead by FlameGraph.

- Add more Android features into support.

- Test for lower Android version.