git.openwrt.org Git - openwrt/staging/yousong.git/blob

   1 From fafb2e7eaec6d33ce16e28f481edf781219d5d27 Mon Sep 17 00:00:00 2001
   2 From: Tony Ambardar <Tony.Ambardar@gmail.com>
   3 Date: Fri, 24 Jul 2020 23:58:17 -0700
   4 Subject: [PATCH] tools/libbpf: ensure no local symbols counted in ABI check
   5
   6 This avoids finding versioned local symbols such as _init and _fini in
   7 the libbpf.so file.
   8
   9 Signed-off-by: Tony Ambardar <Tony.Ambardar@gmail.com>
  10 ---
  11  tools/lib/bpf/Makefile | 2 ++
  12  1 file changed, 2 insertions(+)
  13
  14 diff --git a/tools/lib/bpf/Makefile b/tools/lib/bpf/Makefile
  15 index bf8ed134cb8a..c820b0be9d63 100644
  16 --- a/tools/lib/bpf/Makefile
  17 +++ b/tools/lib/bpf/Makefile
  18 @@ -152,6 +152,7 @@ GLOBAL_SYM_COUNT = $(shell readelf -s --wide $(BPF_IN_SHARED) | \
  19                            awk '/GLOBAL/ && /DEFAULT/ && !/UND/ {print $$NF}' | \
  20                            sort -u | wc -l)
  21  VERSIONED_SYM_COUNT = $(shell readelf --dyn-syms --wide $(OUTPUT)libbpf.so | \
  22 +                             awk '/GLOBAL/ && /DEFAULT/ && !/UND/ {print $$NF}' | \
  23                               grep -Eo '[^ ]+@LIBBPF_' | cut -d@ -f1 | sort -u | wc -l)
  24
  25  CMD_TARGETS = $(LIB_TARGET) $(PC_FILE)
  26 @@ -219,6 +220,7 @@ check_abi: $(OUTPUT)libbpf.so
  27                     awk '/GLOBAL/ && /DEFAULT/ && !/UND/ {print $$NF}'|  \
  28                     sort -u > $(OUTPUT)libbpf_global_syms.tmp;           \
  29                 readelf --dyn-syms --wide $(OUTPUT)libbpf.so |           \
  30 +                   awk '/GLOBAL/ && /DEFAULT/ && !/UND/ {print $$NF}'|  \
  31                     grep -Eo '[^ ]+@LIBBPF_' | cut -d@ -f1 |             \
  32                     sort -u > $(OUTPUT)libbpf_versioned_syms.tmp;        \
  33                 diff -u $(OUTPUT)libbpf_global_syms.tmp                  \
  34 --
  35 2.25.1
  36