so_cmp.sh

   1 #!/bin/sh
   2
   3 export LC_ALL=C
   4
   5 D=data
   6 M=../musl/lib
   7 G=/lib
   8
   9 # list symbol info in tab separated format:
  10 # name versioning type visibility addr size Ndx lib
  11 syms() {
  12         readelf -W -d -s $1 |awk -v lib=$1 '
  13 /^ *[0-9]*:/ && $5 != "LOCAL" && $7 !~ /UND|ABS/ {
  14         sub(/@/," @")
  15         ver = $9
  16         if ($10)
  17                 ver = ver " " $10
  18         print $8 "\t" ver "\t" $4 "\t" $5 "\t" $2 "\t" $3 "\t" $7 "\t" lib
  19 }' | sort |uniq
  20 }
  21
  22 # all symbol info
  23 syms $M/libc.so >$D/so_syms_musl
  24 while read lib
  25 do
  26         syms $G/$lib
  27 done <<EOF | sort >$D/so_syms_glibc
  28 libanl.so.1
  29 libc.so.6
  30 libcidn.so.1
  31 libcrypt.so.1
  32 libdl.so.2
  33 libm.so.6
  34 libnsl.so.1
  35 libnss_compat.so.2
  36 libnss_dns.so.2
  37 libnss_files.so.2
  38 libnss_hesiod.so.2
  39 libnss_nis.so.2
  40 libnss_nisplus.so.2
  41 libpthread.so.0
  42 libresolv.so.2
  43 librt.so.1
  44 libutil.so.1
  45 EOF
  46
  47 # symbol name only
  48 awk -F'\t' '{print $1}' $D/so_syms_glibc |uniq >$D/so_syms_glibc_1
  49 awk -F'\t' '{print $1}' $D/so_syms_musl |uniq >$D/so_syms_musl_1
  50
  51 # difference between musl and glibc symbols
  52 diff $D/so_syms_glibc_1 $D/so_syms_musl_1 >$D/so_syms_1.diff
  53 sed -n '/^< /s/< //p' $D/so_syms_1.diff >$D/so_syms_glibc_1_extra
  54 sed -n '/^> /s/> //p' $D/so_syms_1.diff >$D/so_syms_musl_1_extra
  55
  56 # select symbol info of extra symbols only
  57 selsym() {
  58         awk -v syms=$1 '
  59 BEGIN {
  60         while (getline < syms == 1)
  61                 a[$1] = a[$1] $0 "\n"
  62 }
  63 {printf("%s",a[$1])}
  64 ' $2
  65 }
  66 selsym $D/so_syms_glibc $D/so_syms_glibc_1_extra >$D/so_syms_glibc_extra
  67 selsym $D/so_syms_musl $D/so_syms_musl_1_extra >$D/so_syms_musl_extra