| 文件 | 最后提交记录 | 最后更新时间 |
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tools/resolve_btfids: Add /libbpf to .gitignore [ Upstream commit 90a82b1fa40d0cee33d1c9306dc54412442d1e57 ] This is what I see after compiling the kernel: # bpf-next...bpf-next/master ?? tools/bpf/resolve_btfids/libbpf/ Fixes: fc6b48f692f8 ("tools/resolve_btfids: Build libbpf and libsubcmd in separate directories") Signed-off-by: Stanislav Fomichev <sdf@google.com> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/20210212010053.668700-1-sdf@google.com Signed-off-by: Sasha Levin <sashal@kernel.org> | 5 年前 | |
bpf: Add resolve_btfids tool to resolve BTF IDs in ELF object The resolve_btfids tool scans elf object for .BTF_ids section and resolves its symbols with BTF ID values. It will be used to during linking time to resolve arrays of BTF ID values used in verifier, so these IDs do not need to be resolved in runtime. The expected layout of .BTF_ids section is described in main.c header. Related kernel changes are coming in following changes. Build issue reported by 0-DAY CI Kernel Test Service. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20200711215329.41165-2-jolsa@kernel.org | 5 年前 | |
tools/resolve_btfids: Do not print any commands when building silently stable inclusion from stable-5.10.99 commit 2324f5fcdf9dd104b996d12cd0c173ddcc3c950f category: bugfix issue: #I4UU4A CVE: NA Signed-off-by: gaochao <gaochao49@huawei.com> --------------------------------------- commit 7f3bdbc3f13146eb9d07de81ea71f551587a384b upstream. When building with 'make -s', there is some output from resolve_btfids: $ make -sj"$(nproc)" oldconfig prepare MKDIR .../tools/bpf/resolve_btfids/libbpf/ MKDIR .../tools/bpf/resolve_btfids//libsubcmd LINK resolve_btfids Silent mode means that no information should be emitted about what is currently being done. Use the $(silent) variable from Makefile.include to avoid defining the msg macro so that there is no information printed. Fixes: fbbb68de80a4 ("bpf: Add resolve_btfids tool to resolve BTF IDs in ELF object") Signed-off-by: Nathan Chancellor <nathan@kernel.org> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Link: https://lore.kernel.org/bpf/20220201212503.731732-1-nathan@kernel.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: gc1202 <gaochao49@huawei.com> | 3 年前 | |
bpf: Fix libelf endian handling in resolv_btfids [ Upstream commit 61e8aeda9398925f8c6fc290585bdd9727d154c4 ] The vmlinux ".BTF_ids" ELF section is declared in btf_ids.h to hold a list of zero-filled BTF IDs, which is then patched at link-time with correct values by resolv_btfids. The section is flagged as "allocable" to preclude compression, but notably the section contents (BTF IDs) are untyped. When patching the BTF IDs, resolve_btfids writes in host-native endianness and relies on libelf for any required translation on reading and updating vmlinux. However, since the type of the .BTF_ids section content defaults to ELF_T_BYTE (i.e. unsigned char), no translation occurs. This results in incorrect patched values when cross-compiling to non-native endianness, and can manifest as kernel Oops and test failures which are difficult to troubleshoot [1]. Explicitly set the type of patched data to ELF_T_WORD, the architecture- neutral ELF type corresponding to the u32 BTF IDs. This enables libelf to transparently perform any needed endian conversions. Fixes: fbbb68de80a4 ("bpf: Add resolve_btfids tool to resolve BTF IDs in ELF object") Signed-off-by: Tony Ambardar <Tony.Ambardar@gmail.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Jiri Olsa <jolsa@redhat.com> Cc: Frank Eigler <fche@redhat.com> Cc: Mark Wielaard <mark@klomp.org> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Yonghong Song <yhs@fb.com> Link: https://lore.kernel.org/bpf/CAPGftE_eY-Zdi3wBcgDfkz_iOr1KF10n=9mJHm1_a_PykcsoeA@mail.gmail.com [1] Link: https://lore.kernel.org/bpf/20210618061404.818569-1-Tony.Ambardar@gmail.com Signed-off-by: Sasha Levin <sashal@kernel.org> | 4 年前 |