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