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=$3
  13
  14 if ! test -r System.map -a -x "$DEPMOD"; then
  15         exit 0
  16 fi
  17
  18 # older versions of depmod don't support -P <symbol-prefix>
  19 # support was added in module-init-tools 3.13
  20 if test -n "$SYMBOL_PREFIX"; then
  21         release=$("$DEPMOD" --version)
  22         package=$(echo "$release" | cut -d' ' -f 1)
  23         if test "$package" = "module-init-tools"; then
  24                 version=$(echo "$release" | cut -d' ' -f 2)
  25                 later=$(printf '%s\n' "$version" "3.13" | sort -V | tail -n 1)
  26                 if test "$later" != "$version"; then
  27                         # module-init-tools < 3.13, drop the symbol prefix
  28                         SYMBOL_PREFIX=""
  29                 fi
  30         fi
  31         if test -n "$SYMBOL_PREFIX"; then
  32                 SYMBOL_PREFIX="-P $SYMBOL_PREFIX"
  33         fi
  34 fi
  35
  36 # older versions of depmod require the version string to start with three
  37 # numbers, so we cheat with a symlink here
  38 depmod_hack_needed=true
  39 tmp_dir=$(mktemp -d ${TMPDIR:-/tmp}/depmod.XXXXXX)
  40 mkdir -p "$tmp_dir/lib/modules/$KERNELRELEASE"
  41 if "$DEPMOD" -b "$tmp_dir" $KERNELRELEASE 2>/dev/null; then
  42         if test -e "$tmp_dir/lib/modules/$KERNELRELEASE/modules.dep" -o \
  43                 -e "$tmp_dir/lib/modules/$KERNELRELEASE/modules.dep.bin"; then
  44                 depmod_hack_needed=false
  45         fi
  46 fi
  47 rm -rf "$tmp_dir"
  48 if $depmod_hack_needed; then
  49         symlink="$INSTALL_MOD_PATH/lib/modules/99.98.$KERNELRELEASE"
  50         ln -s "$KERNELRELEASE" "$symlink"
  51         KERNELRELEASE=99.98.$KERNELRELEASE
  52 fi
  53
  54 set -- -ae -F System.map
  55 if test -n "$INSTALL_MOD_PATH"; then
  56         set -- "$@" -b "$INSTALL_MOD_PATH"
  57 fi
  58 "$DEPMOD" "$@" "$KERNELRELEASE" $SYMBOL_PREFIX
  59 ret=$?
  60
  61 if $depmod_hack_needed; then
  62         rm -f "$symlink"
  63 fi
  64
  65 exit $ret