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authorIlya Leoshkevich <iii@linux.ibm.com>2021-04-13 21:00:43 +0200
committerAndrii Nakryiko <andrii@kernel.org>2021-04-13 14:34:27 -0700
commitdb16c1fe92d7ba7d39061faef897842baee2c887 (patch)
tree3e9dd11dd9475f029f1b0c249c1e92e2e4b6852a /scripts/link-vmlinux.sh
parent5c507329000e282dce91e6c98ee6ffa61a8a5e49 (diff)
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-xscripts/link-vmlinux.sh7
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