Henrique Fingler hfingler
hfingler
/ bpf kernel configs
Created
September 30, 2022 22:02
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| scripts/config --enable CONFIG_BPF | |
| scripts/config --enable CONFIG_BPF_SYSCALL | |
| scripts/config --enable CONFIG_HAVE_EBPF_JIT | |
| scripts/config --enable CONFIG_BPF_JIT | |
| scripts/config --enable CONFIG_BPF_JIT_ALWAYS_ON | |
| scripts/config --enable CONFIG_DEBUG_INFO_BTF | |
| scripts/config --enable CONFIG_DEBUG_INFO_BTF_MODULES | |
| scripts/config --enable CONFIG_CGROUPS | |
| scripts/config --enable CONFIG_CGROUP_BPF |
hfingler
/ gist:eb544b23cc36d57b8e9723cd36fbf243
Last active
September 30, 2022 21:59
libbpfs kfunc functions
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| // SPDX-License-Identifier: GPL-2.0 | |
| #include "vmlinux.h" | |
| #include <bpf/bpf_helpers.h> | |
| extern __u64 bpf_kfunc_call_test1(struct sock *sk, __u32 a, __u64 b, | |
| __u32 c, __u64 d) __ksym; | |
| extern __u64 bpf_kfunc_call_test4(__u32 a, __u64 b, | |
| __u32 c, __u64 d) __ksym; |
hfingler
/ gist:5c2c0b713299daa6b0ba07fa92ff29de
Created
September 30, 2022 21:54
libbpf kfunc Permission denied
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| libbpf: loading object 'hello_bpf' from buffer | |
| libbpf: elf: section(3) tc, size 152, link 0, flags 6, type=1 | |
| libbpf: sec 'tc': found program 'kfunc_call_test1' at insn offset 0 (0 bytes), code size 19 insns (152 bytes) | |
| libbpf: elf: section(4) .reltc, size 16, link 11, flags 40, type=9 | |
| libbpf: elf: section(5) license, size 4, link 0, flags 3, type=1 | |
| libbpf: license of hello_bpf is GPL | |
| libbpf: elf: section(6) .BTF, size 89879, link 0, flags 0, type=1 | |
| libbpf: elf: section(8) .BTF.ext, size 236, link 0, flags 0, type=1 | |
| libbpf: elf: section(11) .symtab, size 144, link 1, flags 0, type=2 | |
| libbpf: looking for externs among 6 symbols... |
hfingler
/ gist:ac69e286f9e527dfd678ef2d768e757c
Created
September 28, 2022 20:48
output of bpf handle_tp
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| libbpf: loading object 'hello_bpf' from buffer | |
| libbpf: elf: section(3) tp/raw_syscalls/sys_enter, size 192, link 0, flags 6, type=1 | |
| libbpf: sec 'tp/raw_syscalls/sys_enter': found program 'handle_tp' at insn offset 0 (0 bytes), code size 24 insns (192 bytes) | |
| libbpf: elf: section(4) .reltp/raw_syscalls/sys_enter, size 64, link 13, flags 40, type=9 | |
| libbpf: elf: section(5) .bss, size 4, link 0, flags 3, type=8 | |
| libbpf: elf: section(6) .rodata, size 56, link 0, flags 2, type=1 | |
| libbpf: elf: section(7) license, size 4, link 0, flags 3, type=1 | |
| libbpf: license of hello_bpf is GPL | |
| libbpf: elf: section(8) .BTF, size 89296, link 0, flags 0, type=1 | |
| libbpf: elf: section(10) .BTF.ext, size 192, link 0, flags 0, type=1 |
hfingler
/ gist:dc96af45d87004d0dc412e35be31709c
Created
September 28, 2022 20:44
output of bpf kfunc_call_test1
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| libbpf: loading object 'hello_bpf' from buffer | |
| libbpf: elf: section(3) classifier, size 112, link 0, flags 6, type=1 | |
| libbpf: sec 'classifier': found program 'kfunc_call_test1' at insn offset 0 (0 bytes), code size 14 insns (112 bytes) | |
| libbpf: elf: section(4) .relclassifier, size 32, link 13, flags 40, type=9 | |
| libbpf: elf: section(5) .bss, size 4, link 0, flags 3, type=8 | |
| libbpf: elf: section(6) .rodata, size 28, link 0, flags 2, type=1 | |
| libbpf: elf: section(7) license, size 4, link 0, flags 3, type=1 | |
| libbpf: license of hello_bpf is GPL | |
| libbpf: elf: section(8) .BTF, size 89875, link 0, flags 0, type=1 | |
| libbpf: elf: section(10) .BTF.ext, size 112, link 0, flags 0, type=1 |
hfingler
/ gist:322ca816d598c7a92dbc10048cd61bb3
Created
September 27, 2022 13:50
Output of apt --simulate install libudev-dev on Ubuntu 22.04
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| NOTE: This is only a simulation! | |
| apt needs root privileges for real execution. | |
| Keep also in mind that locking is deactivated, | |
| so don't depend on the relevance to the real current situation! | |
| Reading package lists... Done | |
| Building dependency tree... Done | |
| Reading state information... Done | |
| The following packages were automatically installed and are no longer required: | |
| adwaita-icon-theme bolt eatmydata finalrd fwupd-signed gir1.2-packagekitglib-1.0 gtk-update-icon-cache hicolor-icon-theme humanity-icon-theme initramfs-tools-bin klibc-utils libappstream4 libatasmart4 libatk-bridge2.0-0 libatk1.0-0 | |
| libatk1.0-data libatspi2.0-0 libavahi-client3 libavahi-common-data libavahi-common3 libblockdev-crypto2 libblockdev-fs2 libblockdev-loop2 libblockdev-part-err2 libblockdev-part2 libblockdev-swap2 libblockdev-utils2 libblockdev2 |
hfingler
/ gist:f5597511af0ddf9d0b8ba4ca82bdf781
Created
January 30, 2020 19:09
Alpine container to build aws-sdk-cpp
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| #save this to Dockerfile.x86_64 | |
| #to build, run something like: $docker build --rm -t alpine-awssdk:latest -f Dockerfile.x86_64 . | |
| FROM alpine:edge | |
| RUN apk add git emacs g++ make cmake zlib-dev openssl-dev curl-dev perl nghttp2-static boost-dev build-base | |
| RUN cd / && git clone https://github.com/aws/aws-sdk-cpp.git && \ | |
| mkdir -p sdkbuild && cd sdkbuild && cmake -DBUILD_ONLY="s3;transfer" -DCMAKE_INSTALL_PREFIX=/musl \ | |
| -DBUILD_SHARED_LIBS=OFF -DENABLE_TESTING=OFF -DFORCE_SHARED_CRT=OFF \ |