From 76cb841cb886eef6b3bee341a2266c76578724ad Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Mon, 6 May 2024 03:02:30 +0200 Subject: Adding upstream version 4.19.249. Signed-off-by: Daniel Baumann --- arch/powerpc/tools/checkpatch.sh | 22 +++++++ arch/powerpc/tools/gcc-check-mprofile-kernel.sh | 27 +++++++++ arch/powerpc/tools/head_check.sh | 78 +++++++++++++++++++++++++ arch/powerpc/tools/relocs_check.sh | 61 +++++++++++++++++++ arch/powerpc/tools/unrel_branch_check.sh | 57 ++++++++++++++++++ 5 files changed, 245 insertions(+) create mode 100755 arch/powerpc/tools/checkpatch.sh create mode 100755 arch/powerpc/tools/gcc-check-mprofile-kernel.sh create mode 100644 arch/powerpc/tools/head_check.sh create mode 100755 arch/powerpc/tools/relocs_check.sh create mode 100755 arch/powerpc/tools/unrel_branch_check.sh (limited to 'arch/powerpc/tools') diff --git a/arch/powerpc/tools/checkpatch.sh b/arch/powerpc/tools/checkpatch.sh new file mode 100755 index 000000000..1fad3fb90 --- /dev/null +++ b/arch/powerpc/tools/checkpatch.sh @@ -0,0 +1,22 @@ +#!/bin/bash +# SPDX-License-Identifier: GPL-2.0+ +# Copyright 2018, Michael Ellerman, IBM Corporation. +# +# Wrapper around checkpatch that uses our preferred settings + +script_base=$(realpath $(dirname $0)) + +exec $script_base/../../../scripts/checkpatch.pl \ + --subjective \ + --no-summary \ + --max-line-length=90 \ + --show-types \ + --ignore ARCH_INCLUDE_LINUX \ + --ignore BIT_MACRO \ + --ignore COMPARISON_TO_NULL \ + --ignore EMAIL_SUBJECT \ + --ignore FILE_PATH_CHANGES \ + --ignore GLOBAL_INITIALISERS \ + --ignore LINE_SPACING \ + --ignore MULTIPLE_ASSIGNMENTS \ + $@ diff --git a/arch/powerpc/tools/gcc-check-mprofile-kernel.sh b/arch/powerpc/tools/gcc-check-mprofile-kernel.sh new file mode 100755 index 000000000..137f3376a --- /dev/null +++ b/arch/powerpc/tools/gcc-check-mprofile-kernel.sh @@ -0,0 +1,27 @@ +#!/bin/bash +# SPDX-License-Identifier: GPL-2.0 + +set -e +set -o pipefail + +# To debug, uncomment the following line +# set -x + +# -mprofile-kernel is only supported on 64le, so this should not be invoked +# for other targets. Therefore we can pass in -m64 and -mlittle-endian +# explicitly, to take care of toolchains defaulting to other targets. + +# Test whether the compile option -mprofile-kernel exists and generates +# profiling code (ie. a call to _mcount()). +echo "int func() { return 0; }" | \ + $* -m64 -mlittle-endian -S -x c -O2 -p -mprofile-kernel - -o - \ + 2> /dev/null | grep -q "_mcount" + +# Test whether the notrace attribute correctly suppresses calls to _mcount(). + +echo -e "#include \nnotrace int func() { return 0; }" | \ + $* -m64 -mlittle-endian -S -x c -O2 -p -mprofile-kernel - -o - \ + 2> /dev/null | grep -q "_mcount" && \ + exit 1 + +exit 0 diff --git a/arch/powerpc/tools/head_check.sh b/arch/powerpc/tools/head_check.sh new file mode 100644 index 000000000..ad9e57209 --- /dev/null +++ b/arch/powerpc/tools/head_check.sh @@ -0,0 +1,78 @@ +# Copyright © 2016 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 the head of a vmlinux for linker stubs that +# break our placement of fixed-location code for 64-bit. + +# based on relocs_check.pl +# Copyright © 2009 IBM Corporation + +# NOTE! +# +# If the build dies here, it's likely code in head_64.S/exception-64*.S or +# nearby, is branching to labels it can't reach directly, which results in the +# linker inserting branch stubs. This can move code around in ways that break +# the fixed section calculations (head-64.h). To debug this, disassemble the +# vmlinux and look for branch stubs (long_branch, plt_branch, etc.) in the +# fixed section region (0 - 0x8000ish). Check what code is calling those stubs, +# and perhaps change so a direct branch can reach. +# +# A ".linker_stub_catch" section is used to catch some stubs generated by +# early .text code, which tend to get placed at the start of the section. +# If there are too many such stubs, they can overflow this section. Expanding +# it may help (or reducing the number of stub branches). +# +# Linker stubs use the TOC pointer, so even if fixed section code could +# tolerate them being inserted into head code, they can't be allowed in low +# level entry code (boot, interrupt vectors, etc) until r2 is set up. This +# could cause the kernel to die in early boot. + +# Turn this on if you want more debug output: +# set -x + +if [ $# -lt 2 ]; then + echo "$0 [path to nm] [path to vmlinux]" 1>&2 + exit 1 +fi + +# Have Kbuild supply the path to nm so we handle cross compilation. +nm="$1" +vmlinux="$2" + +# gcc-4.6-era toolchain make _stext an A (absolute) symbol rather than T +$nm "$vmlinux" | grep -e " [TA] _stext$" -e " t start_first_256B$" -e " a text_start$" -e " t start_text$" -m4 > .tmp_symbols.txt + + +vma=$(cat .tmp_symbols.txt | grep -e " [TA] _stext$" | cut -d' ' -f1) + +expected_start_head_addr=$vma + +start_head_addr=$(cat .tmp_symbols.txt | grep " t start_first_256B$" | cut -d' ' -f1) + +if [ "$start_head_addr" != "$expected_start_head_addr" ]; then + echo "ERROR: head code starts at $start_head_addr, should be $expected_start_head_addr" + echo "ERROR: try to enable LD_HEAD_STUB_CATCH config option" + echo "ERROR: see comments in arch/powerpc/tools/head_check.sh" + + exit 1 +fi + +top_vma=$(echo $vma | cut -d'0' -f1) + +expected_start_text_addr=$(cat .tmp_symbols.txt | grep " a text_start$" | cut -d' ' -f1 | sed "s/^0/$top_vma/") + +start_text_addr=$(cat .tmp_symbols.txt | grep " t start_text$" | cut -d' ' -f1) + +if [ "$start_text_addr" != "$expected_start_text_addr" ]; then + echo "ERROR: start_text address is $start_text_addr, should be $expected_start_text_addr" + echo "ERROR: try to enable LD_HEAD_STUB_CATCH config option" + echo "ERROR: see comments in arch/powerpc/tools/head_check.sh" + + exit 1 +fi + +rm -f .tmp_symbols.txt diff --git a/arch/powerpc/tools/relocs_check.sh b/arch/powerpc/tools/relocs_check.sh new file mode 100755 index 000000000..d6c16e7fa --- /dev/null +++ b/arch/powerpc/tools/relocs_check.sh @@ -0,0 +1,61 @@ +#!/bin/sh + +# Copyright © 2015 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 the relocations of a vmlinux for "suspicious" +# relocations. + +# based on relocs_check.pl +# Copyright © 2009 IBM Corporation + +if [ $# -lt 2 ]; then + echo "$0 [path to objdump] [path to vmlinux]" 1>&2 + exit 1 +fi + +# Have Kbuild supply the path to objdump so we handle cross compilation. +objdump="$1" +vmlinux="$2" + +bad_relocs=$( +$objdump -R "$vmlinux" | + # Only look at relocation lines. + grep -E '\ + # R_PPC64_ADDR64 __crc_ + # On PPC: + # R_PPC_RELATIVE, R_PPC_ADDR16_HI, + # R_PPC_ADDR16_HA,R_PPC_ADDR16_LO, + # R_PPC_NONE + grep -F -w -v 'R_PPC64_RELATIVE +R_PPC64_NONE +R_PPC_ADDR16_LO +R_PPC_ADDR16_HI +R_PPC_ADDR16_HA +R_PPC_RELATIVE +R_PPC_NONE' | + grep -E -v '\= 2.19 to build a CONFIG_RELOCATABLE kernel" +fi diff --git a/arch/powerpc/tools/unrel_branch_check.sh b/arch/powerpc/tools/unrel_branch_check.sh new file mode 100755 index 000000000..77114755d --- /dev/null +++ b/arch/powerpc/tools/unrel_branch_check.sh @@ -0,0 +1,57 @@ +# Copyright © 2016 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 the relocations of a vmlinux for "suspicious" +# branches from unrelocated code (head_64.S code). + +# Turn this on if you want more debug output: +# set -x + +# Have Kbuild supply the path to objdump so we handle cross compilation. +objdump="$1" +vmlinux="$2" + +#__end_interrupts should be located within the first 64K + +end_intr=0x$( +$objdump -R "$vmlinux" -d --start-address=0xc000000000000000 \ + --stop-address=0xc000000000010000 | +grep '\<__end_interrupts>:' | +awk '{print $1}' +) + +BRANCHES=$( +$objdump -R "$vmlinux" -D --start-address=0xc000000000000000 \ + --stop-address=${end_intr} | +grep -e "^c[0-9a-f]*:[[:space:]]*\([0-9a-f][0-9a-f][[:space:]]\)\{4\}[[:space:]]*b" | +grep -v '\<__start_initialization_multiplatform>' | +grep -v -e 'b.\?.\?ctr' | +grep -v -e 'b.\?.\?lr' | +sed 's/://' | +awk '{ print $1 ":" $6 ":0x" $7 ":" $8 " "}' +) + +for tuple in $BRANCHES +do + from=`echo $tuple | cut -d':' -f1` + branch=`echo $tuple | cut -d':' -f2` + to=`echo $tuple | cut -d':' -f3 | sed 's/cr[0-7],//'` + sym=`echo $tuple | cut -d':' -f4` + + if (( $to > $end_intr )) + then + if [ -z "$bad_branches" ]; then + echo "WARNING: Unrelocated relative branches" + bad_branches="yes" + fi + echo "$from $branch-> $to $sym" + fi +done + +if [ -z "$bad_branches" ]; then + exit 0 +fi -- cgit v1.2.3