arch/x86/kernel/cpu/mkcapflags.sh

   1 #!/bin/sh
   2 # SPDX-License-Identifier: GPL-2.0
   3 #
   4 # Generate the x86_cap/bug_flags[] arrays from include/asm/cpufeatures.h
   5 #
   6
   7 set -e
   8
   9 IN=$1
  10 OUT=$2
  11
  12 dump_array()
  13 {
  14         ARRAY=$1
  15         SIZE=$2
  16         PFX=$3
  17         POSTFIX=$4
  18
  19         PFX_SZ=$(echo $PFX | wc -c)
  20         TABS="$(printf '\t\t\t\t\t')"
  21
  22         echo "const char * const $ARRAY[$SIZE] = {"
  23
  24         # Iterate through any input lines starting with #define $PFX
  25         sed -n -e 's/\t/ /g' -e "s/^ *# *define *$PFX//p" $IN |
  26         while read i
  27         do
  28                 # Name is everything up to the first whitespace
  29                 NAME="$(echo "$i" | sed 's/ .*//')"
  30
  31                 # If the /* comment */ starts with a quote string, grab that.
  32                 VALUE="$(echo "$i" | sed -n 's@.*/\* *\("[^"]*"\).*\*/@\1@p')"
  33                 [ -z "$VALUE" ] && VALUE="\"$NAME\""
  34                 [ "$VALUE" = '""' ] && continue
  35
  36                 # Name is uppercase, VALUE is all lowercase
  37                 VALUE="$(echo "$VALUE" | tr A-Z a-z)"
  38
  39         if [ -n "$POSTFIX" ]; then
  40             T=$(( $PFX_SZ + $(echo $POSTFIX | wc -c) + 2 ))
  41                 TABS="$(printf '\t\t\t\t\t\t')"
  42                     TABCOUNT=$(( ( 6*8 - ($T + 1) - $(echo "$NAME" | wc -c) ) / 8 ))
  43                     printf "\t[%s - %s]%.*s = %s,\n" "$PFX$NAME" "$POSTFIX" "$TABCOUNT" "$TABS" "$VALUE"
  44         else
  45                     TABCOUNT=$(( ( 5*8 - ($PFX_SZ + 1) - $(echo "$NAME" | wc -c) ) / 8 ))
  46             printf "\t[%s]%.*s = %s,\n" "$PFX$NAME" "$TABCOUNT" "$TABS" "$VALUE"
  47         fi
  48         done
  49         echo "};"
  50 }
  51
  52 trap 'rm "$OUT"' EXIT
  53
  54 (
  55         echo "#ifndef _ASM_X86_CPUFEATURES_H"
  56         echo "#include <asm/cpufeatures.h>"
  57         echo "#endif"
  58         echo ""
  59
  60         dump_array "x86_cap_flags" "NCAPINTS*32" "X86_FEATURE_" ""
  61         echo ""
  62
  63         dump_array "x86_bug_flags" "NBUGINTS*32" "X86_BUG_" "NCAPINTS*32"
  64
  65 ) > $OUT
  66
  67 trap - EXIT