de3c5a17cb
Kernel version enforcement for kprobes/kretprobes was removed from 5.0 kernel in 6c4fc209fcf9 ("bpf: remove useless version check for prog load"). Since then, BPF programs were specifying SEC("version") just to please libbpf. We should stop enforcing this in libbpf, if even kernel doesn't care. Furthermore, libbpf now will pre-populate current kernel version of the host system, in case we are still running on old kernel. This patch also removes __bpf_object__open_xattr from libbpf.h, as nothing in libbpf is relying on having it in that header. That function was never exported as LIBBPF_API and even name suggests its internal version. So this should be safe to remove, as it doesn't break ABI. Signed-off-by: Andrii Nakryiko <andriin@fb.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> |
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include | ||
scripts | ||
src | ||
travis-ci/managers | ||
.travis.yml | ||
BPF-CHECKPOINT-COMMIT | ||
CHECKPOINT-COMMIT | ||
README.md |
This is a mirror of bpf-next linux tree's
tools/lib/bpf
directory plus its supporting header files.
The following files will by sync'ed with bpf-next repo:
src/
<->bpf-next/tools/lib/bpf/
include/uapi/linux/bpf_common.h
<->bpf-next/tools/include/uapi/linux/bpf_common.h
include/uapi/linux/bpf.h
<->bpf-next/tools/include/uapi/linux/bpf.h
include/uapi/linux/btf.h
<->bpf-next/tools/include/uapi/linux/btf.h
include/uapi/linux/if_link.h
<->bpf-next/tools/include/uapi/linux/if_link.h
include/uapi/linux/if_xdp.h
<->bpf-next/tools/include/uapi/linux/if_xdp.h
include/uapi/linux/netlink.h
<->bpf-next/tools/include/uapi/linux/netlink.h
include/tools/libc_compat.h
<->bpf-next/tools/include/tools/libc_compat.h
Other header files at this repo (include/linux/*.h
) are reduced versions of
their counterpart files at bpf-next's tools/include/linux/*.h
to make compilation
successful.
Build
libelf is an internal dependency of libbpf and thus it is required to link
against and must be installed on the system for applications to work.
pkg-config is used by default to find libelf, and the program called can be
overridden with PKG_CONFIG
.
If using pkg-config
at build time is not desired, it can be disabled by setting
NO_PKG_CONFIG=1
when calling make.
To build both static libbpf.a and shared libbpf.so:
$ cd src
$ make
To build only static libbpf.a library in directory build/ and install them together with libbpf headers in a staging directory root/:
$ cd src
$ mkdir build root
$ BUILD_STATIC_ONLY=y OBJDIR=build DESTDIR=root make install
To build both static libbpf.a and shared libbpf.so against a custom libelf dependency installed in /build/root/ and install them together with libbpf headers in a build directory /build/root/:
$ cd src
$ PKG_CONFIG_PATH=/build/root/lib64/pkgconfig DESTDIR=/build/root make install