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Date: Sun, 1 Dec 2019 20:57:28 +0100 From: Aurelien Jarno <aurelien@...el32.net> To: linux-kernel@...r.kernel.org Cc: linuxppc-dev@...ts.ozlabs.org, debian-kernel@...ts.debian.org, Aurelien Jarno <aurelien@...el32.net>, Alexei Starovoitov <ast@...nel.org>, Daniel Borkmann <daniel@...earbox.net>, Martin KaFai Lau <kafai@...com>, Song Liu <songliubraving@...com>, Yonghong Song <yhs@...com>, Andrii Nakryiko <andriin@...com>, netdev@...r.kernel.org (open list:BPF (Safe dynamic programs and tools)), bpf@...r.kernel.org (open list:BPF (Safe dynamic programs and tools)) Subject: [PATCH] libbpf: fix readelf output parsing on powerpc with recent binutils On powerpc with recent versions of binutils, readelf outputs an extra field when dumping the symbols of an object file. For example: 35: 0000000000000838 96 FUNC LOCAL DEFAULT [<localentry>: 8] 1 btf_is_struct The extra "[<localentry>: 8]" prevents the GLOBAL_SYM_COUNT variable to be computed correctly and causes the checkabi target to fail. Fix that by looking for the symbol name in the last field instead of the 8th one. This way it should also cope with future extra fields. Signed-off-by: Aurelien Jarno <aurelien@...el32.net> --- tools/lib/bpf/Makefile | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/tools/lib/bpf/Makefile b/tools/lib/bpf/Makefile index 99425d0be6ff..333900cf3f4f 100644 --- a/tools/lib/bpf/Makefile +++ b/tools/lib/bpf/Makefile @@ -147,7 +147,7 @@ TAGS_PROG := $(if $(shell which etags 2>/dev/null),etags,ctags) GLOBAL_SYM_COUNT = $(shell readelf -s --wide $(BPF_IN_SHARED) | \ cut -d "@" -f1 | sed 's/_v[0-9]_[0-9]_[0-9].*//' | \ - awk '/GLOBAL/ && /DEFAULT/ && !/UND/ {print $$8}' | \ + awk '/GLOBAL/ && /DEFAULT/ && !/UND/ {print $$NF}' | \ sort -u | wc -l) VERSIONED_SYM_COUNT = $(shell readelf -s --wide $(OUTPUT)libbpf.so | \ grep -Eo '[^ ]+@...BPF_' | cut -d@ -f1 | sort -u | wc -l) @@ -216,7 +216,7 @@ check_abi: $(OUTPUT)libbpf.so "versioned in $(VERSION_SCRIPT)." >&2; \ readelf -s --wide $(OUTPUT)libbpf-in.o | \ cut -d "@" -f1 | sed 's/_v[0-9]_[0-9]_[0-9].*//' | \ - awk '/GLOBAL/ && /DEFAULT/ && !/UND/ {print $$8}'| \ + awk '/GLOBAL/ && /DEFAULT/ && !/UND/ {print $$NF}'| \ sort -u > $(OUTPUT)libbpf_global_syms.tmp; \ readelf -s --wide $(OUTPUT)libbpf.so | \ grep -Eo '[^ ]+@...BPF_' | cut -d@ -f1 | \ -- 2.24.0
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