add driver 5G

hc

2024-01-31 f9004dbfff8a3fbbd7e2a88c8a4327c7f2f8e5b2

 kernel/arch/powerpc/tools/unrel_branch_check.sh
..
..
@@ -1,57 +1,79 @@
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-# Copyright © 2016 IBM Corporation
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+#!/bin/bash
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+# SPDX-License-Identifier: GPL-2.0+
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+# Copyright © 2016,2020 IBM Corporation
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 #
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-# This program is free software; you can redistribute it and/or
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-# modify it under the terms of the GNU General Public License
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-# as published by the Free Software Foundation; either version
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-# 2 of the License, or (at your option) any later version.
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-#
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-# This script checks the relocations of a vmlinux for "suspicious"
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-# branches from unrelocated code (head_64.S code).
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+# This script checks the unrelocated code of a vmlinux for "suspicious"
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+# branches to relocated code (head_64.S code).
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-# Turn this on if you want more debug output:
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-# set -x
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-
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-# Have Kbuild supply the path to objdump so we handle cross compilation.
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+# Have Kbuild supply the path to objdump and nm so we handle cross compilation.
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 objdump="$1"
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-vmlinux="$2"
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+nm="$2"
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+vmlinux="$3"
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12
 
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-#__end_interrupts should be located within the first 64K
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+kstart=0xc000000000000000
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-end_intr=0x$(
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-$objdump -R "$vmlinux" -d --start-address=0xc000000000000000           \
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-		 --stop-address=0xc000000000010000 |
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-grep '\<__end_interrupts>:' |
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-awk '{print $1}'
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-)
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+end_intr=0x$($nm -p "$vmlinux" |
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+	sed -E -n '/\s+[[:alpha:]]\s+__end_interrupts\s*$/{s///p;q}')
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+if [ "$end_intr" = "0x" ]; then
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+	exit 0
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+fi
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20
 
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-BRANCHES=$(
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-$objdump -R "$vmlinux" -D --start-address=0xc000000000000000           \
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-		--stop-address=${end_intr} |
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-grep -e "^c[0-9a-f]*:[[:space:]]*\([0-9a-f][0-9a-f][[:space:]]\)\{4\}[[:space:]]*b" |
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-grep -v '\<__start_initialization_multiplatform>' |
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-grep -v -e 'b.\?.\?ctr' |
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-grep -v -e 'b.\?.\?lr' |
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-sed 's/://' |
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-awk '{ print $1 ":" $6 ":0x" $7 ":" $8 " "}'
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-)
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+# we know that there is a correct branch to
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+# __start_initialization_multiplatform, so find its address
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+# so we can exclude it.
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+sim=0x$($nm -p "$vmlinux" |
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+	sed -E -n '/\s+[[:alpha:]]\s+__start_initialization_multiplatform\s*$/{s///p;q}')
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-for tuple in $BRANCHES
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-do
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-	from=`echo $tuple | cut -d':' -f1`
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-	branch=`echo $tuple | cut -d':' -f2`
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-	to=`echo $tuple | cut -d':' -f3 | sed 's/cr[0-7],//'`
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-	sym=`echo $tuple | cut -d':' -f4`
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+$objdump -D --no-show-raw-insn --start-address="$kstart" --stop-address="$end_intr" "$vmlinux" |
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+sed -E -n '
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+# match lines that start with a kernel address
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+/^c[0-9a-f]*:\s*b/ {
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+	# drop branches via ctr or lr
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+	/\<b.?.?(ct|l)r/d
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+	# cope with some differences between Clang and GNU objdumps
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+	s/\<bt.?\s*[[:digit:]]+,/beq/
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+	s/\<bf.?\s*[[:digit:]]+,/bne/
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+	# tidy up
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+	s/\s0x/ /
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+	s/://
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+	# format for the loop below
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+	s/^(\S+)\s+(\S+)\s+(\S+)\s*(\S*).*$/\1:\2:\3:\4/
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+	# strip out condition registers
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+	s/:cr[0-7],/:/
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+	p
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+}' | {
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-	if (( $to > $end_intr ))
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-	then
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-		if [ -z "$bad_branches" ]; then
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-			echo "WARNING: Unrelocated relative branches"
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-			bad_branches="yes"
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+all_good=true
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+while IFS=: read -r from branch to sym; do
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+	case "$to" in
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+	c*)	to="0x$to"
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+		;;
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+	.+*)
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+		to=${to#.+}
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+		if [ "$branch" = 'b' ]; then
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+			if (( to >= 0x2000000 )); then
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+				to=$(( to - 0x4000000 ))
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+			fi
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+		elif (( to >= 0x8000 )); then
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+			to=$(( to - 0x10000 ))
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 		fi
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-		echo "$from $branch-> $to $sym"
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+		printf -v to '0x%x' $(( "0x$from" + to ))
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+		;;
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+	*)	printf 'Unkown branch format\n'
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+		;;
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+	esac
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+	if [ "$to" = "$sim" ]; then
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+		continue
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+	fi
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+	if (( to > end_intr )); then
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+		if $all_good; then
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+			printf '%s\n' 'WARNING: Unrelocated relative branches'
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+			all_good=false
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+		fi
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+		printf '%s %s-> %s %s\n' "$from" "$branch" "$to" "$sym"
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 	fi
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 done
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-if [ -z "$bad_branches" ]; then
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-	exit 0
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-fi
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+$all_good
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+
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+}