diff options
Diffstat (limited to 'arch/powerpc/kernel/prom_init_check.sh')
| -rw-r--r-- | arch/powerpc/kernel/prom_init_check.sh | 74 |
1 files changed, 44 insertions, 30 deletions
diff --git a/arch/powerpc/kernel/prom_init_check.sh b/arch/powerpc/kernel/prom_init_check.sh index 3765da6be4f2..3090b97258ae 100644 --- a/arch/powerpc/kernel/prom_init_check.sh +++ b/arch/powerpc/kernel/prom_init_check.sh @@ -1,11 +1,8 @@ #!/bin/sh +# SPDX-License-Identifier: GPL-2.0-or-later # # Copyright © 2008 IBM Corporation # -# This program is free software; you can redistribute it and/or -# modify it under the terms of the GNU General Public License -# as published by the Free Software Foundation; either version -# 2 of the License, or (at your option) any later version. # This script checks prom_init.o to see what external symbols it # is using, if it finds symbols not in the whitelist it returns @@ -16,30 +13,53 @@ # If you really need to reference something from prom_init.o add # it to the list below: +has_renamed_memintrinsics() +{ + grep -q "^CONFIG_KASAN=y$" "${KCONFIG_CONFIG}" && \ + ! grep -q "^CONFIG_CC_HAS_KASAN_MEMINTRINSIC_PREFIX=y" "${KCONFIG_CONFIG}" +} + +if has_renamed_memintrinsics +then + MEM_FUNCS="__memcpy __memset" +else + MEM_FUNCS="memcpy memset" +fi + WHITELIST="add_reloc_offset __bss_start __bss_stop copy_and_flush -_end enter_prom memcpy memset reloc_offset __secondary_hold +_end enter_prom $MEM_FUNCS reloc_offset __secondary_hold __secondary_hold_acknowledge __secondary_hold_spinloop __start -strcmp strcpy strlcpy strlen strncmp strstr logo_linux_clut224 +logo_linux_clut224 btext_prepare_BAT reloc_got2 kernstart_addr memstart_addr linux_banner _stext -opal_query_takeover opal_do_takeover opal_enter_rtas opal_secondary_entry -boot_command_line __prom_init_toc_start __prom_init_toc_end" +btext_setup_display TOC. relocate" NM="$1" OBJ="$2" ERROR=0 -for UNDEF in $($NM -u $OBJ | awk '{print $2}') +check_section() +{ + file=$1 + section=$2 + size=$(objdump -h -j "$section" "$file" 2>/dev/null | awk "\$2 == \"$section\" {print \$3}") + size=${size:-0} + if [ "$size" -ne 0 ]; then + ERROR=1 + echo "Error: Section $section not empty in prom_init.c" >&2 + fi +} + +for UNDEF in $($NM -u "$OBJ" | awk '{print $2}') do # On 64-bit nm gives us the function descriptors, which have # a leading . on the name, so strip it off here. UNDEF="${UNDEF#.}" - if [ $KBUILD_VERBOSE ]; then - if [ $KBUILD_VERBOSE -ne 0 ]; then - echo "Checking prom_init.o symbol '$UNDEF'" - fi - fi + case "$KBUILD_VERBOSE" in + *1*) + echo "Checking prom_init.o symbol '$UNDEF'" ;; + esac OK=0 for WHITE in $WHITELIST @@ -51,24 +71,14 @@ do done # ignore register save/restore funcitons - if [ "${UNDEF:0:9}" = "_restgpr_" ]; then - OK=1 - fi - if [ "${UNDEF:0:10}" = "_restgpr0_" ]; then - OK=1 - fi - if [ "${UNDEF:0:11}" = "_rest32gpr_" ]; then - OK=1 - fi - if [ "${UNDEF:0:9}" = "_savegpr_" ]; then - OK=1 - fi - if [ "${UNDEF:0:10}" = "_savegpr0_" ]; then + case $UNDEF in + _restgpr_*|_restgpr0_*|_rest32gpr_*) OK=1 - fi - if [ "${UNDEF:0:11}" = "_save32gpr_" ]; then + ;; + _savegpr_*|_savegpr0_*|_save32gpr_*) OK=1 - fi + ;; + esac if [ $OK -eq 0 ]; then ERROR=1 @@ -77,4 +87,8 @@ do fi done +check_section "$OBJ" .data +check_section "$OBJ" .bss +check_section "$OBJ" .init.data + exit $ERROR |