Gecko [ tsuru-no-tsurugi.tokyo ]

Name	Size	Permission	Date
atomic	[ DIR ]	drwxr-xr-x	2026-06-27 06:50
basic	[ DIR ]	drwxr-xr-x	2026-06-27 06:50
clang-tools	[ DIR ]	drwxr-xr-x	2026-06-27 06:50
coccinelle	[ DIR ]	drwxr-xr-x	2026-06-27 06:50
dtc	[ DIR ]	drwxr-xr-x	2026-06-27 06:50
dummy-tools	[ DIR ]	drwxr-xr-x	2026-06-27 06:50
gcc-plugins	[ DIR ]	drwxr-xr-x	2026-06-27 06:50
gdb	[ DIR ]	drwxr-xr-x	2026-06-27 06:50
genksyms	[ DIR ]	drwxr-xr-x	2026-06-27 06:50
kconfig	[ DIR ]	drwxr-xr-x	2026-06-27 06:50
ksymoops	[ DIR ]	drwxr-xr-x	2026-06-27 06:50
mod	[ DIR ]	drwxr-xr-x	2026-06-27 06:50
package	[ DIR ]	drwxr-xr-x	2026-06-27 06:50
selinux	[ DIR ]	drwxr-xr-x	2026-06-27 06:50
tracing	[ DIR ]	drwxr-xr-x	2026-06-27 06:50
.gitignore	160 B	-rw-r--r--	2021-11-01 05:53
Kbuild.include	10.15 KB	-rw-r--r--	2026-06-20 00:54
Kconfig.include	2.57 KB	-rw-r--r--	2026-06-20 00:54
Lindent	502 B	-rwxr-xr-x	2021-11-01 05:53
Makefile	1.64 KB	-rw-r--r--	2026-06-20 00:54
Makefile.asm-generic	1.82 KB	-rw-r--r--	2021-11-01 05:53
Makefile.build	19.66 KB	-rw-r--r--	2026-06-20 00:54
Makefile.clang	1.56 KB	-rw-r--r--	2026-06-20 00:54
Makefile.clean	2.2 KB	-rw-r--r--	2021-11-01 05:53
Makefile.compiler	2.74 KB	-rw-r--r--	2026-06-20 00:54
Makefile.dtbinst	1007 B	-rw-r--r--	2026-06-20 00:54
Makefile.extrawarn	3.02 KB	-rw-r--r--	2026-06-20 00:54
Makefile.gcc-plugins	2.71 KB	-rw-r--r--	2026-06-20 00:54
Makefile.headersinst	2.88 KB	-rw-r--r--	2021-11-01 05:53
Makefile.host	4.63 KB	-rw-r--r--	2021-11-01 05:53
Makefile.kasan	1.67 KB	-rw-r--r--	2021-11-01 05:53
Makefile.kcov	333 B	-rw-r--r--	2021-11-01 05:53
Makefile.kcsan	739 B	-rw-r--r--	2021-11-01 05:53
Makefile.lib	18.02 KB	-rw-r--r--	2026-06-20 00:54
Makefile.modfinal	2.73 KB	-rw-r--r--	2026-06-20 00:54
Makefile.modinst	2.52 KB	-rw-r--r--	2026-06-20 00:54
Makefile.modpost	4.37 KB	-rw-r--r--	2026-06-20 00:54
Makefile.package	6.61 KB	-rw-r--r--	2021-11-01 05:53
Makefile.ubsan	770 B	-rw-r--r--	2026-06-20 00:54
Makefile.userprogs	1.57 KB	-rw-r--r--	2021-11-01 05:53
adjust_autoksyms.sh	2.07 KB	-rwxr-xr-x	2021-11-01 05:53
as-version.sh	2.03 KB	-rwxr-xr-x	2026-06-20 00:54
asn1_compiler.c	35.33 KB	-rw-r--r--	2026-06-20 00:54
bin2c.c	743 B	-rw-r--r--	2021-11-01 05:53
bloat-o-meter	3.36 KB	-rwxr-xr-x	2021-11-01 05:53
bootgraph.pl	5.64 KB	-rwxr-xr-x	2021-11-01 05:53
bpf_doc.py	24.98 KB	-rwxr-xr-x	2026-06-20 00:54
cc-can-link.sh	166 B	-rwxr-xr-x	2021-11-01 05:53
cc-version.sh	1.51 KB	-rwxr-xr-x	2021-11-01 05:53
check-sysctl-docs	4.37 KB	-rwxr-xr-x	2021-11-01 05:53
check_extable.sh	4.93 KB	-rwxr-xr-x	2021-11-01 05:53
checkdeclares.pl	1.1 KB	-rwxr-xr-x	2021-11-01 05:53
checkincludes.pl	1.94 KB	-rwxr-xr-x	2021-11-01 05:53
checkkconfigsymbols.py	15.75 KB	-rwxr-xr-x	2026-06-20 00:54
checkpatch.pl	223.76 KB	-rwxr-xr-x	2026-06-20 00:54
checkstack.pl	5.86 KB	-rwxr-xr-x	2026-06-20 00:54
checksyscalls.sh	7.42 KB	-rwxr-xr-x	2021-11-01 05:53
checkversion.pl	2.16 KB	-rwxr-xr-x	2021-11-01 05:53
cleanfile	3.46 KB	-rwxr-xr-x	2021-11-01 05:53
cleanpatch	5.06 KB	-rwxr-xr-x	2021-11-01 05:53
coccicheck	7.89 KB	-rwxr-xr-x	2021-11-01 05:53
config	4.78 KB	-rwxr-xr-x	2026-06-20 00:54
const_structs.checkpatch	1009 B	-rw-r--r--	2021-11-01 05:53
decode_stacktrace.sh	7.51 KB	-rwxr-xr-x	2026-06-20 00:54
decodecode	2.88 KB	-rwxr-xr-x	2021-11-01 05:53
depmod.sh	1.41 KB	-rwxr-xr-x	2021-11-01 05:53
dev-needs.sh	6.07 KB	-rwxr-xr-x	2021-11-01 05:53
diffconfig	4.12 KB	-rwxr-xr-x	2026-06-20 00:54
documentation-file-ref-check	5.55 KB	-rwxr-xr-x	2021-11-01 05:53
export_report.pl	4.5 KB	-rwxr-xr-x	2021-11-01 05:53
extract-cert.c	3.63 KB	-rw-r--r--	2026-06-20 00:54
extract-ikconfig	1.69 KB	-rwxr-xr-x	2021-11-01 05:53
extract-module-sig.pl	3.66 KB	-rwxr-xr-x	2021-11-01 05:53
extract-sys-certs.pl	3.75 KB	-rwxr-xr-x	2021-11-01 05:53
extract-vmlinux	1.66 KB	-rwxr-xr-x	2021-11-01 05:53
extract_xc3028.pl	44.62 KB	-rwxr-xr-x	2021-11-01 05:53
faddr2line	8.17 KB	-rwxr-xr-x	2026-06-20 00:54
file-size.sh	86 B	-rwxr-xr-x	2021-11-01 05:53
find-unused-docs.sh	1.27 KB	-rwxr-xr-x	2021-11-01 05:53
gcc-goto.sh	511 B	-rwxr-xr-x	2021-11-01 05:53
gcc-ld	711 B	-rwxr-xr-x	2021-11-01 05:53
gcc-x86_32-has-stack-protector.sh	405 B	-rwxr-xr-x	2026-06-20 00:54
gcc-x86_64-has-stack-protector.sh	195 B	-rwxr-xr-x	2026-06-20 00:54
gen_autoksyms.sh	1.47 KB	-rwxr-xr-x	2021-11-01 05:53
gen_ksymdeps.sh	556 B	-rwxr-xr-x	2021-11-01 05:53
generate_initcall_order.pl	5.95 KB	-rwxr-xr-x	2021-11-01 05:53
get_abi.pl	15.1 KB	-rwxr-xr-x	2026-06-20 00:54
get_dvb_firmware	24.54 KB	-rwxr-xr-x	2021-11-01 05:53
get_feat.pl	14.34 KB	-rwxr-xr-x	2021-11-01 05:53
get_maintainer.pl	67.13 KB	-rwxr-xr-x	2021-11-01 05:53
gfp-translate	1.69 KB	-rwxr-xr-x	2021-11-01 05:53
headerdep.pl	3.5 KB	-rwxr-xr-x	2021-11-01 05:53
headers_check.pl	3.73 KB	-rwxr-xr-x	2021-11-01 05:53
headers_install.sh	3.35 KB	-rwxr-xr-x	2021-11-01 05:53
insert-sys-cert.c	13.08 KB	-rw-r--r--	2026-06-20 00:54
jobserver-exec	2.16 KB	-rwxr-xr-x	2021-11-01 05:53
kallsyms.c	18.06 KB	-rw-r--r--	2021-11-01 05:53
kernel-doc	68.74 KB	-rwxr-xr-x	2026-06-20 00:54
ld-version.sh	1.82 KB	-rwxr-xr-x	2026-06-20 00:54
leaking_addresses.pl	12.8 KB	-rwxr-xr-x	2026-06-20 00:54
link-vmlinux.sh	10.92 KB	-rwxr-xr-x	2026-06-20 00:54
makelst	808 B	-rwxr-xr-x	2021-11-01 05:53
markup_oops.pl	7.92 KB	-rwxr-xr-x	2021-11-01 05:53
min-tool-version.sh	558 B	-rwxr-xr-x	2021-11-01 05:53
mkcompile_h	2.48 KB	-rwxr-xr-x	2021-11-01 05:53
mksysmap	1.34 KB	-rwxr-xr-x	2026-06-20 00:54
mkuboot.sh	414 B	-rwxr-xr-x	2021-11-01 05:53
module.lds.S	1.65 KB	-rw-r--r--	2026-06-20 00:54
modules-check.sh	427 B	-rwxr-xr-x	2021-11-01 05:53
nsdeps	1.72 KB	-rw-r--r--	2021-11-01 05:53
objdiff	2.84 KB	-rwxr-xr-x	2021-11-01 05:53
pahole-flags.sh	749 B	-rwxr-xr-x	2026-06-20 00:54
pahole-version.sh	269 B	-rwxr-xr-x	2026-06-20 00:54
parse-maintainers.pl	4.54 KB	-rwxr-xr-x	2021-11-01 05:53
patch-kernel	9.95 KB	-rwxr-xr-x	2021-11-01 05:53
profile2linkerlist.pl	414 B	-rwxr-xr-x	2021-11-01 05:53
prune-kernel	708 B	-rwxr-xr-x	2021-11-01 05:53
recordmcount.c	16.75 KB	-rw-r--r--	2026-06-20 00:54
recordmcount.h	19.37 KB	-rw-r--r--	2021-11-01 05:53
recordmcount.pl	17.63 KB	-rwxr-xr-x	2026-06-20 00:54
remove-stale-files	1.3 KB	-rwxr-xr-x	2021-11-01 05:53
setlocalversion	3.5 KB	-rwxr-xr-x	2021-11-01 05:53
show_delta	3.01 KB	-rwxr-xr-x	2021-11-01 05:53
sign-file.c	9.93 KB	-rw-r--r--	2026-06-20 00:54
sorttable.c	8.74 KB	-rw-r--r--	2026-06-20 00:54
sorttable.h	9.83 KB	-rw-r--r--	2026-06-20 00:54
spdxcheck-test.sh	277 B	-rw-r--r--	2021-11-01 05:53
spdxcheck.py	10.09 KB	-rwxr-xr-x	2021-11-01 05:53
spelling.txt	31.88 KB	-rw-r--r--	2021-11-01 05:53
sphinx-pre-install	24.45 KB	-rwxr-xr-x	2026-06-20 00:54
split-man.pl	604 B	-rwxr-xr-x	2021-11-01 05:53
stackdelta	1.84 KB	-rwxr-xr-x	2021-11-01 05:53
stackusage	794 B	-rwxr-xr-x	2021-11-01 05:53
subarch.include	619 B	-rw-r--r--	2021-11-01 05:53
syscallhdr.sh	1.89 KB	-rwxr-xr-x	2021-11-01 05:53
syscallnr.sh	1.45 KB	-rwxr-xr-x	2021-11-01 05:53
syscalltbl.sh	1.45 KB	-rwxr-xr-x	2021-11-01 05:53
tags.sh	9.87 KB	-rwxr-xr-x	2026-06-20 00:54
tools-support-relr.sh	546 B	-rwxr-xr-x	2021-11-01 05:53
ubuntu-retpoline-extract-one	7.26 KB	-rw-r--r--	2026-06-20 00:54
unifdef.c	34.8 KB	-rw-r--r--	2021-11-01 05:53
ver_linux	2.59 KB	-rwxr-xr-x	2021-11-01 05:53
xen-hypercalls.sh	386 B	-rwxr-xr-x	2021-11-01 05:53
xz_wrap.sh	563 B	-rwxr-xr-x	2021-11-01 05:53

Rename

#! /bin/bash
# SPDX-License-Identifier: GPL-2.0
# (c) 2015, Quentin Casasnovas <quentin.casasnovas@oracle.com>

obj=$1

file ${obj} | grep -q ELF || (echo "${obj} is not an ELF file." 1>&2 ; exit 0)

# Bail out early if there isn't an __ex_table section in this object file.
objdump -hj __ex_table ${obj} 2> /dev/null > /dev/null
[ $? -ne 0 ] && exit 0

white_list=.text,.fixup

suspicious_relocs=$(objdump -rj __ex_table ${obj}  | tail -n +6 |
			grep -v $(eval echo -e{${white_list}}) | awk '{print $3}')

# No suspicious relocs in __ex_table, jobs a good'un
[ -z "${suspicious_relocs}" ] && exit 0

# After this point, something is seriously wrong since we just found out we
# have some relocations in __ex_table which point to sections which aren't
# white listed.  If you're adding a new section in the Linux kernel, and
# you're expecting this section to contain code which can fault (i.e. the
# __ex_table relocation to your new section is expected), simply add your
# new section to the white_list variable above.  If not, you're probably
# doing something wrong and the rest of this code is just trying to print
# you more information about it.

function find_section_offset_from_symbol()
{
    eval $(objdump -t ${obj} | grep ${1} | sed 's/$[0-9a-f]\+$ .\{7\} $[^ \t]\+$.*/section="\2"; section_offset="0x\1" /')

# addr2line takes addresses in hexadecimal...
    section_offset=$(printf "0x%016x" $(( ${section_offset} + $2 )) )
}

function find_symbol_and_offset_from_reloc()
{
    # Extract symbol and offset from the objdump output
    eval $(echo $reloc | sed 's/$[^+]\+$+\?$0x[0-9a-f]\+$\?/symbol="\1"; symbol_offset="\2"/')

# When the relocation points to the begining of a symbol or section, it
    # won't print the offset since it is zero.
    if [ -z "${symbol_offset}" ]; then
	symbol_offset=0x0
    fi
}

function find_alt_replacement_target()
{
    # The target of the .altinstr_replacement is the relocation just before
    # the .altinstr_replacement one.
    eval $(objdump -rj .altinstructions ${obj} | grep -B1 "${section}+${section_offset}" | head -n1 | awk '{print $3}' |
	   sed 's/$[^+]\+$+$0x[0-9a-f]\+$/alt_target_section="\1"; alt_target_offset="\2"/')
}

function handle_alt_replacement_reloc()
{
    # This will define alt_target_section and alt_target_section_offset
    find_alt_replacement_target ${section} ${section_offset}

echo "Error: found a reference to .altinstr_replacement in __ex_table:"
    addr2line -fip -j ${alt_target_section} -e ${obj} ${alt_target_offset} | awk '{print "\t" $0}'

error=true
}

function is_executable_section()
{
    objdump -hwj ${section} ${obj} | grep -q CODE
    return $?
}

function handle_suspicious_generic_reloc()
{
    if is_executable_section ${section}; then
	# We've got a relocation to a non white listed _executable_
	# section, print a warning so the developper adds the section to
	# the white list or fix his code.  We try to pretty-print the file
	# and line number where that relocation was added.
	echo "Warning: found a reference to section \"${section}\" in __ex_table:"
	addr2line -fip -j ${section} -e ${obj} ${section_offset} | awk '{print "\t" $0}'
    else
	# Something is definitively wrong here since we've got a relocation
	# to a non-executable section, there's no way this would ever be
	# running in the kernel.
	echo "Error: found a reference to non-executable section \"${section}\" in __ex_table at offset ${section_offset}"
	error=true
    fi
}

function diagnose()
{

for reloc in ${suspicious_relocs}; do
	# Let's find out where the target of the relocation in __ex_table
	# is, this will define ${symbol} and ${symbol_offset}
	find_symbol_and_offset_from_reloc ${reloc}

# When there's a global symbol at the place of the relocation,
	# objdump will use it instead of giving us a section+offset, so
	# let's find out which section is this symbol in and the total
	# offset withing that section.
	find_section_offset_from_symbol ${symbol} ${symbol_offset}

# In this case objdump was presenting us with a reloc to a symbol
	# rather than a section. Now that we've got the actual section,
	# we can skip it if it's in the white_list.
	if [ -z "$( echo $section | grep -v $(eval echo -e{${white_list}}))" ]; then
	    continue;
	fi

# Will either print a warning if the relocation happens to be in a
	# section we do not know but has executable bit set, or error out.
	handle_suspicious_reloc
    done
}

function check_debug_info() {
    objdump -hj .debug_info ${obj} 2> /dev/null > /dev/null ||
	echo -e "${obj} does not contain debug information, the addr2line output will be limited.\n" \
	     "Recompile ${obj} with CONFIG_DEBUG_INFO to get a more useful output."
}

check_debug_info

diagnose

if [ "${error}" ]; then
    exit 1
fi

exit 0