arch/x86/kernel/cpu/mkcapflags.sh

   1 #!/bin/sh
   2 #
   3 # Generate the x86_cap/bug_flags[] arrays from include/asm/cpufeatures.h
   4 #
   5
   6 set -e
   7
   8 IN=$1
   9 OUT=$2
  10
  11 dump_array()
  12 {
  13         ARRAY=$1
  14         SIZE=$2
  15         PFX=$3
  16         POSTFIX=$4
  17
  18         PFX_SZ=$(echo $PFX | wc -c)
  19         TABS="$(printf '\t\t\t\t\t')"
  20
  21         echo "const char * const $ARRAY[$SIZE] = {"
  22
  23         # Iterate through any input lines starting with #define $PFX
  24         sed -n -e 's/\t/ /g' -e "s/^ *# *define *$PFX//p" $IN |
  25         while read i
  26         do
  27                 # Name is everything up to the first whitespace
  28                 NAME="$(echo "$i" | sed 's/ .*//')"
  29
  30                 # If the /* comment */ starts with a quote string, grab that.
  31                 VALUE="$(echo "$i" | sed -n 's@.*/\* *\("[^"]*"\).*\*/@\1@p')"
  32                 [ -z "$VALUE" ] && VALUE="\"$NAME\""
  33                 [ "$VALUE" = '""' ] && continue
  34
  35                 # Name is uppercase, VALUE is all lowercase
  36                 VALUE="$(echo "$VALUE" | tr A-Z a-z)"
  37
  38         if [ -n "$POSTFIX" ]; then
  39             T=$(( $PFX_SZ + $(echo $POSTFIX | wc -c) + 2 ))
  40                 TABS="$(printf '\t\t\t\t\t\t')"
  41                     TABCOUNT=$(( ( 6*8 - ($T + 1) - $(echo "$NAME" | wc -c) ) / 8 ))
  42                     printf "\t[%s - %s]%.*s = %s,\n" "$PFX$NAME" "$POSTFIX" "$TABCOUNT" "$TABS" "$VALUE"
  43         else
  44                     TABCOUNT=$(( ( 5*8 - ($PFX_SZ + 1) - $(echo "$NAME" | wc -c) ) / 8 ))
  45             printf "\t[%s]%.*s = %s,\n" "$PFX$NAME" "$TABCOUNT" "$TABS" "$VALUE"
  46         fi
  47         done
  48         echo "};"
  49 }
  50
  51 trap 'rm "$OUT"' EXIT
  52
  53 (
  54         echo "#ifndef _ASM_X86_CPUFEATURES_H"
  55         echo "#include <asm/cpufeatures.h>"
  56         echo "#endif"
  57         echo ""
  58
  59         dump_array "x86_cap_flags" "NCAPINTS*32" "X86_FEATURE_" ""
  60         echo ""
  61
  62         dump_array "x86_bug_flags" "NBUGINTS*32" "X86_BUG_" "NCAPINTS*32"
  63
  64 ) > $OUT
  65
  66 trap - EXIT