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| author | Ilya Leoshkevich <iii@linux.ibm.com> | 2021-04-13 21:00:43 +0200 |
|---|---|---|
| committer | Andrii Nakryiko <andrii@kernel.org> | 2021-04-13 23:34:27 +0200 |
| commit | db16c1fe92d7ba7d39061faef897842baee2c887 (patch) | |
| tree | 3e9dd11dd9475f029f1b0c249c1e92e2e4b6852a /scripts/link-vmlinux.sh | |
| parent | libbpf: Clarify flags in ringbuf helpers (diff) | |
| download | linux-db16c1fe92d7ba7d39061faef897842baee2c887.tar.xz linux-db16c1fe92d7ba7d39061faef897842baee2c887.zip | |
bpf: Generate BTF_KIND_FLOAT when linking vmlinux
pahole v1.21 supports the --btf_gen_floats flag, which makes it
generate the information about the floating-point types [1].
Adjust link-vmlinux.sh to pass this flag to pahole in case it's
supported, which is determined using a simple version check.
[1] https://lore.kernel.org/dwarves/YHRiXNX1JUF2Az0A@kernel.org/
Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Acked-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20210413190043.21918-1-iii@linux.ibm.com
Diffstat (limited to 'scripts/link-vmlinux.sh')
| -rwxr-xr-x | scripts/link-vmlinux.sh | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/scripts/link-vmlinux.sh b/scripts/link-vmlinux.sh index 3b261b0f74f0..667aacb9261c 100755 --- a/scripts/link-vmlinux.sh +++ b/scripts/link-vmlinux.sh @@ -213,6 +213,7 @@ vmlinux_link() gen_btf() { local pahole_ver + local extra_paholeopt= if ! [ -x "$(command -v ${PAHOLE})" ]; then echo >&2 "BTF: ${1}: pahole (${PAHOLE}) is not available" @@ -227,8 +228,12 @@ gen_btf() vmlinux_link ${1} + if [ "${pahole_ver}" -ge "121" ]; then + extra_paholeopt="${extra_paholeopt} --btf_gen_floats" + fi + info "BTF" ${2} - LLVM_OBJCOPY=${OBJCOPY} ${PAHOLE} -J ${1} + LLVM_OBJCOPY=${OBJCOPY} ${PAHOLE} -J ${extra_paholeopt} ${1} # Create ${2} which contains just .BTF section but no symbols. Add # SHF_ALLOC because .BTF will be part of the vmlinux image. --strip-all |