scripts/depmod.sh

   1 #!/bin/sh
   2 # SPDX-License-Identifier: GPL-2.0
   3 #
   4 # A depmod wrapper used by the toplevel Makefile
   5
   6 if test $# -ne 3; then
   7         echo "Usage: $0 /sbin/depmod <kernelrelease> <symbolprefix>" >&2
   8         exit 1
   9 fi
  10 DEPMOD=$1
  11 KERNELRELEASE=$2
  12 SYMBOL_PREFIX=$3
  13
  14 if ! test -r System.map ; then
  15         exit 0
  16 fi
  17
  18 if [ -z $(command -v $DEPMOD) ]; then
  19         echo "Warning: 'make modules_install' requires $DEPMOD. Please install it." >&2
  20         echo "This is probably in the kmod package." >&2
  21         exit 0
  22 fi
  23
  24 # older versions of depmod don't support -P <symbol-prefix>
  25 # support was added in module-init-tools 3.13
  26 if test -n "$SYMBOL_PREFIX"; then
  27         release=$("$DEPMOD" --version)
  28         package=$(echo "$release" | cut -d' ' -f 1)
  29         if test "$package" = "module-init-tools"; then
  30                 version=$(echo "$release" | cut -d' ' -f 2)
  31                 later=$(printf '%s\n' "$version" "3.13" | sort -V | tail -n 1)
  32                 if test "$later" != "$version"; then
  33                         # module-init-tools < 3.13, drop the symbol prefix
  34                         SYMBOL_PREFIX=""
  35                 fi
  36         fi
  37         if test -n "$SYMBOL_PREFIX"; then
  38                 SYMBOL_PREFIX="-P $SYMBOL_PREFIX"
  39         fi
  40 fi
  41
  42 # older versions of depmod require the version string to start with three
  43 # numbers, so we cheat with a symlink here
  44 depmod_hack_needed=true
  45 tmp_dir=$(mktemp -d ${TMPDIR:-/tmp}/depmod.XXXXXX)
  46 mkdir -p "$tmp_dir/lib/modules/$KERNELRELEASE"
  47 if "$DEPMOD" -b "$tmp_dir" $KERNELRELEASE 2>/dev/null; then
  48         if test -e "$tmp_dir/lib/modules/$KERNELRELEASE/modules.dep" -o \
  49                 -e "$tmp_dir/lib/modules/$KERNELRELEASE/modules.dep.bin"; then
  50                 depmod_hack_needed=false
  51         fi
  52 fi
  53 rm -rf "$tmp_dir"
  54 if $depmod_hack_needed; then
  55         symlink="$INSTALL_MOD_PATH/lib/modules/99.98.$KERNELRELEASE"
  56         ln -s "$KERNELRELEASE" "$symlink"
  57         KERNELRELEASE=99.98.$KERNELRELEASE
  58 fi
  59
  60 set -- -ae -F System.map
  61 if test -n "$INSTALL_MOD_PATH"; then
  62         set -- "$@" -b "$INSTALL_MOD_PATH"
  63 fi
  64 "$DEPMOD" "$@" "$KERNELRELEASE" $SYMBOL_PREFIX
  65 ret=$?
  66
  67 if $depmod_hack_needed; then
  68         rm -f "$symlink"
  69 fi
  70
  71 exit $ret