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basic	[ DIR ]	drwxr-xr-x
coccinelle	[ DIR ]	drwxr-xr-x
dtc	[ DIR ]	drwxr-xr-x
gcc-plugins	[ DIR ]	drwxr-xr-x
gdb	[ DIR ]	drwxr-xr-x
genksyms	[ DIR ]	drwxr-xr-x
kconfig	[ DIR ]	drwxr-xr-x
ksymoops	[ DIR ]	drwxr-xr-x
mod	[ DIR ]	drwxr-xr-x
package	[ DIR ]	drwxr-xr-x
selinux	[ DIR ]	drwxr-xr-x
tracing	[ DIR ]	drwxr-xr-x
.asn1_compiler.cmd	4.48 KB	-rw-r--r--
.conmakehash.cmd	3.48 KB	-rw-r--r--
.extract-cert.cmd	5.75 KB	-rw-r--r--
.insert-sys-cert.cmd	5.3 KB	-rw-r--r--
.kallsyms.cmd	3.75 KB	-rw-r--r--
.recordmcount.cmd	4.72 KB	-rw-r--r--
.sign-file.cmd	6.61 KB	-rw-r--r--
.sortextable.cmd	4.92 KB	-rw-r--r--
Kbuild.include	18.32 KB	-rw-r--r--
Lindent	502 B	-rwxr-xr-x
Makefile	1.6 KB	-rw-r--r--
Makefile.asm-generic	1.17 KB	-rw-r--r--
Makefile.build	20.56 KB	-rw-r--r--
Makefile.clean	2.96 KB	-rw-r--r--
Makefile.dtbinst	1.09 KB	-rw-r--r--
Makefile.extrawarn	2.59 KB	-rw-r--r--
Makefile.gcc-plugins	3.58 KB	-rw-r--r--
Makefile.headersinst	3.98 KB	-rw-r--r--
Makefile.host	6.23 KB	-rw-r--r--
Makefile.kasan	1.09 KB	-rw-r--r--
Makefile.kcov	201 B	-rw-r--r--
Makefile.lib	15.25 KB	-rw-r--r--
Makefile.modbuiltin	1.82 KB	-rw-r--r--
Makefile.modinst	1.52 KB	-rw-r--r--
Makefile.modpost	5.49 KB	-rw-r--r--
Makefile.modsign	1.02 KB	-rw-r--r--
Makefile.ubsan	1.07 KB	-rw-r--r--
adjust_autoksyms.sh	3.09 KB	-rwxr-xr-x
asn1_compiler	30.83 KB	-rwxr-xr-x
asn1_compiler.c	35.54 KB	-rw-r--r--
bloat-o-meter	3.21 KB	-rwxr-xr-x
bootgraph.pl	6.28 KB	-rwxr-xr-x
check_00index.sh	1.3 KB	-rwxr-xr-x
check_extable.sh	4.93 KB	-rwxr-xr-x
checkincludes.pl	1.94 KB	-rwxr-xr-x
checkkconfigsymbols.py	15.51 KB	-rwxr-xr-x
checkpatch.pl	186.79 KB	-rwxr-xr-x
checkstack.pl	5.48 KB	-rwxr-xr-x
checksyscalls.sh	5.68 KB	-rwxr-xr-x
checkversion.pl	1.9 KB	-rwxr-xr-x
cleanfile	3.46 KB	-rwxr-xr-x
cleanpatch	5.06 KB	-rwxr-xr-x
coccicheck	7.23 KB	-rwxr-xr-x
config	4.53 KB	-rwxr-xr-x
conmakehash	12.8 KB	-rwxr-xr-x
conmakehash.c	5.98 KB	-rw-r--r--
const_structs.checkpatch	964 B	-rw-r--r--
decode_stacktrace.sh	3.74 KB	-rwxr-xr-x
decodecode	2.29 KB	-rwxr-xr-x
depmod.sh	1.7 KB	-rwxr-xr-x
diffconfig	3.72 KB	-rwxr-xr-x
documentation-file-ref-check	395 B	-rwxr-xr-x
export_report.pl	4.55 KB	-rwxr-xr-x
extract-cert	13.69 KB	-rwxr-xr-x
extract-cert.c	3.46 KB	-rw-r--r--
extract-ikconfig	1.69 KB	-rwxr-xr-x
extract-module-sig.pl	3.66 KB	-rwxr-xr-x
extract-sys-certs.pl	3.75 KB	-rwxr-xr-x
extract-vmlinux	1.6 KB	-rwxr-xr-x
extract_xc3028.pl	44.6 KB	-rwxr-xr-x
faddr2line	5.53 KB	-rwxr-xr-x
find-unused-docs.sh	1.28 KB	-rwxr-xr-x
gcc-goto.sh	530 B	-rwxr-xr-x
gcc-ld	711 B	-rwxr-xr-x
gcc-plugin.sh	1.06 KB	-rwxr-xr-x
gcc-version.sh	857 B	-rwxr-xr-x
gcc-x86_32-has-stack-protector...	219 B	-rwxr-xr-x
gcc-x86_64-has-stack-protector...	244 B	-rwxr-xr-x
gen_initramfs_list.sh	8.03 KB	-rwxr-xr-x
get_dvb_firmware	25.22 KB	-rwxr-xr-x
get_maintainer.pl	65.03 KB	-rwxr-xr-x
gfp-translate	1.71 KB	-rwxr-xr-x
headerdep.pl	3.5 KB	-rwxr-xr-x
headers.sh	512 B	-rwxr-xr-x
headers_check.pl	3.73 KB	-rwxr-xr-x
headers_install.sh	1.32 KB	-rwxr-xr-x
insert-sys-cert	18.05 KB	-rwxr-xr-x
insert-sys-cert.c	13.08 KB	-rw-r--r--
kallsyms	18.23 KB	-rwxr-xr-x
kallsyms.c	18.71 KB	-rw-r--r--
kernel-doc	92.36 KB	-rwxr-xr-x
kmsg-doc	12.13 KB	-rwxr-xr-x
ld-version.sh	269 B	-rwxr-xr-x
leaking_addresses.pl	9.64 KB	-rwxr-xr-x
link-vmlinux.sh	7.65 KB	-rwxr-xr-x
makelst	808 B	-rwxr-xr-x
markup_oops.pl	8.08 KB	-rwxr-xr-x
mkcompile_h	2.48 KB	-rwxr-xr-x
mkmakefile	1.19 KB	-rwxr-xr-x
mksysmap	1.33 KB	-rwxr-xr-x
mkuboot.sh	414 B	-rwxr-xr-x
module-common.lds	901 B	-rw-r--r--
namespace.pl	13.05 KB	-rwxr-xr-x
objdiff	2.85 KB	-rwxr-xr-x
parse-maintainers.pl	3.72 KB	-rw-r--r--
patch-kernel	9.95 KB	-rwxr-xr-x
pnmtologo.c	11.91 KB	-rw-r--r--
profile2linkerlist.pl	414 B	-rwxr-xr-x
prune-kernel	708 B	-rwxr-xr-x
recordmcount	28.05 KB	-rwxr-xr-x
recordmcount.c	17.2 KB	-rw-r--r--
recordmcount.h	16.38 KB	-rw-r--r--
recordmcount.pl	18 KB	-rwxr-xr-x
setlocalversion	3.92 KB	-rwxr-xr-x
show_delta	2.99 KB	-rwxr-xr-x
sign-file	18.31 KB	-rwxr-xr-x
sign-file.c	9.76 KB	-rw-r--r--
sortextable	17.61 KB	-rwxr-xr-x
sortextable.c	8.35 KB	-rw-r--r--
sortextable.h	5.48 KB	-rw-r--r--
spelling.txt	24.97 KB	-rw-r--r--
sphinx-pre-install	14.04 KB	-rwxr-xr-x
stackdelta	1.84 KB	-rwxr-xr-x
stackusage	794 B	-rwxr-xr-x
tags.sh	9.49 KB	-rwxr-xr-x
ubuntu-retpoline-extract-one	7.25 KB	-rw-r--r--
unifdef.c	34.8 KB	-rw-r--r--
ver_linux	2.94 KB	-rwxr-xr-x
xen-hypercalls.sh	386 B	-rw-r--r--
xz_wrap.sh	562 B	-rwxr-xr-x

Code Editor : ubuntu-retpoline-extract-one

#!/bin/bash

exec </dev/null

object="$1"
src="$2"
bit16="$3"

SECTION=".discard.retpoline_safe"

# Form an associative lookup for the symbol numbers in the ELF symbol table.
# Uses 8 character 0 expanded hexadecimal key for ease of consumption.
__symbolmap_init()
{
	readelf -W --syms "$1" |
		awk '($4 == "SECTION" && $1 ~ /^[0-9]*:/) { printf("%08x %08x\n", int($1), int($7)); }' | \
	while read symbol_num section_num
	do
		echo "symbolmap_$symbol_num='$section_num'"
	done
}
symbolmap_init()
{
	eval $(__symbolmap_init "$1")
}
symbolmap()
{
	eval RET="\$symbolmap_$1"
	if [ "$RET" = '' ]; then
		echo "symbolmap: $1: invalid section" 1>&2
		exit 1
	fi
}

# Form an associative lookup for the section numbers in the ELF symbol table.
# Uses 8 character 0 expanded hexadecimal key for ease of consumption.
__sectionmap_init()
{
	readelf -W --headers "$1" | \
		awk '
						{ sub("\\[", ""); sub("\\]", ""); }
                        ($1 ~ /^[0-9][0-9]*/)   { printf("%08x %s %s %s\n", int($1), $2, $3, $4); }
		' | \
	{
		while read section_num section_name section_type section_vma
		do
			echo "sectionmap_$section_num='$section_name'"
			echo "sectionvma_$section_num='$section_vma'"
			case "$section_type" in
			REL|RELA) section_relocation="$section_type" ;;
			esac
		done
		echo "section_relocation='$section_relocation'"
	}
}
sectionmap_init()
{
	eval $(__sectionmap_init "$1")
}
sectionmap()
{
	eval RET="\$sectionmap_$1"
	if [ "$RET" = '' ]; then
		echo "sectionmap: $1: invalid section" 1>&2
		exit 1
	fi
}
sectionvma()
{
	eval RET="\$sectionvma_$1"
	if [ "$RET" = '' ]; then
		echo "sectionvma: $1: invalid section" 1>&2
		exit 1
	fi
}

# Read and parse the hex-dump output.
hex="[0-9a-f]"
hex_8="$hex$hex$hex$hex$hex$hex$hex$hex"
hexspc="[0-9a-f ]"
hexspc_8="$hexspc$hexspc$hexspc$hexspc$hexspc$hexspc$hexspc$hexspc"

raw32()
{
	readelf --hex-dump "$2" "$1" 2>/dev/null |
	sed \
		-e '/^Hex/d' -e '/^$/d' -e '/^ *NOTE/d' \
		-e 's/  *[^ ][^ ]*  *$'"$hex_8"'$ $'"$hexspc_8"'$ $'"$hexspc_8"'$ $'"$hexspc_8"'$ .*/\1 \2 \3 \4 /' \
		-e 's/$'"$hex$hex"'$$'"$hex$hex"'$$'"$hex$hex"'$$'"$hex$hex"'$ /\4\3\2\1 /g' \
		-e 's/ $//g' -e 's/ /\n/g'
}
#-e 's/$[^ ][^ ][^ ][^ ][^ ][^ ][^ ][^ ]$ $[^ ][^ ][^ ][^ ][^ ][^ ][^ ][^ ]$ /\2\1 /g' \

rela()
{
	#file="$(basename "$1")"
	file="$1"

# Read relocation information for a 64bit binary.  Each relocation entry
	# is 3 long longs so we collect 6 quads here.  Note that the dump is in
	# listed in increasing byte order not withstanding the quad split.
	#
	# The record says to take the value of <symbol> add <symbol offset> and
	# shove that into <write offset> in the segment of the <symbol>.
	#
	# Format:
	#  <write offset>	64 bits
	#  <symbol number>	32 bits
	#  <relocation type>	32 bits
	#  <symbol offset>	64 bits
	raw32 "$1" ".rela$SECTION" | \
	{
		a1=''; a2=''; a3=''; a4=''; a5=''
		while read a6
		do
			[ "$a1" = '' ] && { a1="$a6"; continue; }
			[ "$a2" = '' ] && { a2="$a6"; continue; }
			[ "$a3" = '' ] && { a3="$a6"; continue; }
			[ "$a4" = '' ] && { a4="$a6"; continue; }
			[ "$a5" = '' ] && { a5="$a6"; continue; }

#echo ">$a1< >$a2< >$a3< >$a4< >$a5< >$a6<" 1>&2
			#echo "type<$a3> symbol<$a4> offset<$a2$a1> addr<$a6a5>" 1>&2

symbolmap "$a4"; section_num="$RET"
			#echo "section_num<$section_num>" 1>&2

sectionmap "$section_num"; section="$RET"
			sectionvma "$section_num"; vma="$RET"
			#echo "section<$section> vma<$vma>" 1>&2

# Adjust the segment addressing by the segment offset.
			printf -v addr "%u" "0x$a6$a5"
			printf -v vma "%u" "0x$vma"
			let offset="$addr + $vma"
			printf -v offset "%x" "$offset"

echo "$file-$section-$offset"

a1=''; a2=''; a3=''; a4=''; a5=''
		done
	} | sed -e 's/-00*$[0-9a-f]$/-\1/'
}

# Form an associative lookup for the raw contents for an ELF section.
# Uses 8 character 0 expanded hexadecimal key for ease of consumption.
contentmap_init()
{
	raw32 "$1" "$2" >"$tmp.cm"
	let offset=0
	while read value
	do
		printf -v offset_hex "%08x" $offset
		eval contentmap_$offset_hex=\'$value\'

let offset="$offset + 4"
	done <"$tmp.cm"
	rm -f "$tmp.cm"
}
contentmap()
{
	eval RET="\$contentmap_$1"
	if [ "$RET" = '' ]; then
		echo "contentmap: $1: invalid offset" 1>&2
		exit 1
	fi
}

rel()
{
	# Load up the current contents of the $SECTION segment
	# as the offsets (see below) are recorded there and we will need
	# those to calculate the actuall address.
	contentmap_init "$1" "$SECTION"

#file="$(basename "$1")"
	file="$1"

# Read relocation information for a 32bit binary.  Each relocation entry
	# is 3 longs so we collect 3 quads here.  Note that the dump is in
	# listed in increasing byte order not withstanding the quad split.
	#
	# The record says to take the value of <symbol> and add that to the
	# existing contents of <write offset> in the segment of the <symbol>.
	#
	# Format:
	#  <write offset>	32 bits
	#  <symbol number>	24 bits
	#  <relocation type>	 8 bits
	raw32 "$1" ".rel$SECTION" | \
	{
		a1=''
		while read a2
		do
			[ "$a1" = '' ] && { a1="$a2"; continue; }

#echo ">$a1< >$a2<"
			contentmap "$a1"; offset="$RET"
			symbolmap "00${a2%??}"; section_num="$RET"

sectionmap "$section_num"; section="$RET"
			sectionvma "$section_num"; vma="$RET"
			#echo ">$a1< >$a2< >$offset< >$section<"

echo "$file-$section-$offset"

a1=''
		done
	} | sed -e 's/-00*$[0-9a-f]$/-\1/'
}

tmp="/tmp/retpoline-extract.$$"

disassemble()
{
	local object="$1"
	local src="$2"
	local options="$3"
	local selector="$4"

objdump $options --disassemble --no-show-raw-insn "$object" | \
	awk -F' ' '
		BEGIN				{ file="'"$object"'"; src="'"$src"'"; }
		/Disassembly of section/        { segment=$4; sub(":", "", segment); }
		/^[0-9a-f][0-9a-f]* <.*>:/      { tag=$0; sub(".*<", "", tag); sub(">.*", "", tag); }
		$0 ~ /(call|jmp)q?  *\*0x[0-9a-f]*$%rip$/ {
			next
		}
		$0 ~ /(call|jmp)q?  *\*.*%/ {
			sub(":", "", $1);
			if ('"$selector"') {
				offset=$1
				$1=tag
				print(file "-" segment "-" offset " " src " " segment " " $0);
			}
		}
	'
}

# Accumulate potentially vunerable indirect call/jmp sequences.  We do this
# by examining the raw disassembly for affected forms, recording the location
# of each.
case "$bit16" in
'')	disassemble "$object" "$src" '' 'segment != ".init.text"' ;;
*)	disassemble "$object" "$src" '--disassembler-options=i8086' 'segment != ".init.text" && segment != ".text32" && segment != ".text64"'
	disassemble "$object" "$src" '--disassembler-options=i386' 'segment == ".text32"'
	disassemble "$object" "$src" '--disassembler-options=x86-64' 'segment == ".text64"'
	;;
esac | sort -k 1b,1 >"$object.ur-detected"
[ ! -s "$object.ur-detected" ] && rm -f "$object.ur-detected"

# Load up the symbol table and section mappings.
symbolmap_init "$object"
sectionmap_init "$object"

# Accumulate annotated safe indirect call/jmp sequences.  We do this by examining
# the $SECTION sections (and their associated relocation information),
# each entry represents the address of an instruction which has been marked
# as ok.
case "$section_relocation" in
REL)	rel "$object" ;;
RELA)	rela "$object" ;;
esac | sort -k 1b,1 >"$object.ur-safe"
[ ! -s "$object.ur-safe" ] && rm -f "$object.ur-safe"

# We will perform the below join on the summarised and sorted fragments
# formed above.  This is performed in retpoline-check.
#join -v 1 -j 1 "$tmp.extracted" "$tmp.safe" | sed -s 's/[^ ]*  *//'

rm -f "$tmp".*

${this.title}

Code Editor : ubuntu-retpoline-extract-one