From 39b9a0b3d24daba1090019d1ba1a18454bf4aab1 Mon Sep 17 00:00:00 2001 From: Aurelien Jarno Date: Sun, 1 Dec 2019 20:57:28 +0100 Subject: [PATCH] libbpf: Fix readelf output parsing on powerpc with recent binutils [ Upstream commit 3464afdf11f9a1e031e7858a05351ceca1792fea ] 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 [: 8] 1 btf_is_struct The extra "[: 8]" prevents the GLOBAL_SYM_COUNT variable to be computed correctly and causes the check_abi 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 Signed-off-by: Daniel Borkmann Tested-by: Michael Ellerman Link: https://lore.kernel.org/bpf/20191201195728.4161537-1-aurelien@aurel32.net Signed-off-by: Sasha Levin --- 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 33e2638ef7f0..122321d54922 100644 --- a/tools/lib/bpf/Makefile +++ b/tools/lib/bpf/Makefile @@ -145,7 +145,7 @@ PC_FILE := $(addprefix $(OUTPUT),$(PC_FILE)) 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 '[^ ]+@LIBBPF_' | cut -d@ -f1 | sort -u | wc -l) @@ -217,7 +217,7 @@ check_abi: $(OUTPUT)libbpf.so "versioned in $(VERSION_SCRIPT)." >&2; \ 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 > $(OUTPUT)libbpf_global_syms.tmp; \ readelf -s --wide $(OUTPUT)libbpf.so | \ grep -Eo '[^ ]+@LIBBPF_' | cut -d@ -f1 | \ -- 2.43.0