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Guenter Roeck 51962a9d43 scripts/kallsyms.c: ignore symbol type 'n' 
gcc on aarch64 may emit synbols of type 'n' if the kernel is built with
'-frecord-gcc-switches'.  In most cases, those symbols are reported with
nm as

	000000000000000e n $d

and with objdump as

	0000000000000000 l    d  .GCC.command.line	0000000000000000 .GCC.command.line
	000000000000000e l       .GCC.command.line	0000000000000000 $d

Those symbols are detected in is_arm_mapping_symbol() and ignored.
However, if "--prefix-symbols=<prefix>" is configured as well, the
situation is different.  For example, in efi/libstub, arm64 images are
built with

	'--prefix-alloc-sections=.init --prefix-symbols=__efistub_'.

In combination with '-frecord-gcc-switches', the symbols are now reported
by nm as:

	000000000000000e n __efistub_$d
and by objdump as:
	0000000000000000 l    d  .GCC.command.line	0000000000000000 .GCC.command.line
	000000000000000e l       .GCC.command.line	0000000000000000 __efistub_$d

Those symbols are no longer ignored and included in the base address
calculation.  This results in a base address of 000000000000000e, which
in turn causes kallsyms to abort with

    kallsyms failure:
	relative symbol value 0xffffff900800a000 out of range in relative mode

The problem is seen in little endian arm64 builds with CONFIG_EFI
enabled and with '-frecord-gcc-switches' set in KCFLAGS.

Explicitly ignore symbols of type 'n' since those are clearly debug
symbols.

Link: http://lkml.kernel.org/r/1507136063-3139-1-git-send-email-linux@roeck-us.net
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Acked-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 		2017-10-13 16:18:32 -07:00
..
basic fixdep: trivial: typo fix and correction 2017-08-10 01:01:03 +09:00
coccinelle drm: Introduce drm_property_blob_{get,put}() 2017-02-28 16:16:46 +01:00
dtc scripts/dtc: dtx_diff - 2nd update of include dts paths to match build 2017-09-20 10:13:05 -05:00
gcc-plugins Merge branch 'for-next/gcc-plugin/structleak' into for-next/gcc-plugins 2017-08-07 13:29:04 -07:00
gdb kbuild: use $(abspath ...) instead of $(shell cd ... && /bin/pwd) 2017-09-01 08:50:32 +09:00
genksyms genksyms: fix gperf removal conversion 2017-09-08 14:32:34 -07:00
kconfig Remove gperf usage from toolchain 2017-08-19 11:02:53 -07:00
ksymoops Fix dead URLs to ftp.kernel.org 2017-03-28 16:16:52 +02:00
mod Modules updates for v4.14 2017-09-13 11:28:19 -07:00
package kbuild: rpm-pkg: fix version number handling 2017-09-21 00:06:03 +09:00
selinux selinux: genheaders should fail if too many permissions are defined 2017-07-31 19:03:02 -04:00
tracing ftrace/scripts: Add helper script to bisect function tracing problem functions 2016-09-21 13:56:55 -04:00
.gitignore Docs: clean up some DocBook loose ends 2017-06-23 14:17:38 -06:00
Kbuild.include kbuild: trivial cleanups on the comments 2017-08-10 00:58:20 +09:00
Lindent scripts/Lindent: clean up and optimize 2017-02-22 16:41:26 -08:00
Makefile Docs: clean up some DocBook loose ends 2017-06-23 14:17:38 -06:00
Makefile.asm-generic kbuild: update comments of Makefile.asm-generic 2017-08-25 00:10:05 +09:00
Makefile.build objtool: Skip unreachable warnings for GCC 4.4 and older 2017-09-28 07:23:02 +02:00
Makefile.clean Shared library support 2016-06-07 22:57:10 +02:00
Makefile.dtbinst kbuild: Do not use hyphen in exported variable name 2017-08-21 09:06:00 +09:00
Makefile.extrawarn Kbuild: enable -Wunused-macros warning for "make W=2" 2017-09-01 08:53:17 +09:00
Makefile.gcc-plugins gcc-plugins: structleak: add option to init all vars used as byref args 2017-08-07 11:20:57 -07:00
Makefile.headersinst kbuild: remove wrapper files handling from Makefile.headersinst 2017-07-11 21:33:54 +09:00
Makefile.help
…
Makefile.host kbuild: Add __cc-option macro 2017-06-25 12:47:55 +09:00
Makefile.kasan kasan: turn on -fsanitize-address-use-after-scope 2016-12-12 18:55:09 -08:00
Makefile.lib remove gperf left-overs from build system 2017-09-09 10:00:15 -07:00
Makefile.modbuiltin
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Makefile.modinst modsign: Abort modules_install when signing fails 2015-08-07 16:26:13 +01:00
Makefile.modpost kbuild: add arch specific post-link Makefile 2016-09-09 10:47:00 +02:00
Makefile.modsign
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Makefile.ubsan Kbuild: enable -Wmaybe-uninitialized warning for "make W=1" 2016-11-11 08:45:08 -08:00
adjust_autoksyms.sh kbuild: fix scripts/adjust_autoksyms.sh* for the no modules case 2016-12-11 22:30:10 +01:00
asn1_compiler.c ASN.1: fix open failure check on headername 2016-04-06 14:06:48 +01:00
bloat-o-meter scripts/bloat-o-meter: compile .NUMBER regex 2016-12-12 18:55:06 -08:00
bootgraph.pl scripts: Switch to more portable Perl shebang 2017-05-14 11:20:44 +09:00
check_00index.sh scripts: add a script to check if Documentation/00-INDEX is sane 2016-12-05 14:21:24 -07:00
check_extable.sh
…
checkincludes.pl scripts: Switch to more portable Perl shebang 2017-05-14 11:20:44 +09:00
checkkconfigsymbols.py checkkconfigsymbols.py: support Kconfig's 'imply' statement 2017-02-03 11:49:06 +01:00
checkpatch.pl checkpatch: fix ignoring cover-letter logic 2017-10-03 17:54:26 -07:00
checkstack.pl scripts: Switch to more portable Perl shebang 2017-05-14 11:20:44 +09:00
checksyscalls.sh kbuild: speed up checksyscalls.sh 2017-06-10 01:15:36 +09:00
checkversion.pl scripts: Switch to more portable Perl shebang 2017-05-14 11:20:44 +09:00
cleanfile scripts: Switch to more portable Perl shebang 2017-05-14 11:20:44 +09:00
cleanpatch scripts: Switch to more portable Perl shebang 2017-05-14 11:20:44 +09:00
coccicheck scripts/coccicheck: Update reference for the corresponding documentation 2016-10-11 09:50:43 +02:00
config
…
conmakehash.c
…
const_structs.checkpatch const_structs.checkpatch: add frequently used from Julia Lawall's list 2016-10-11 15:06:30 -07:00
decode_stacktrace.sh scripts/decode_stacktrace.sh: Fix address line detection on x86 2016-11-29 14:19:50 +01:00
decodecode
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depmod.sh
…
diffconfig
…
export_report.pl scripts: Switch to more portable Perl shebang 2017-05-14 11:20:44 +09:00
extract-cert.c KEYS: Remove unnecessary header #inclusions from extract-cert.c 2015-09-25 16:31:45 +01:00
extract-ikconfig
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extract-module-sig.pl scripts: Switch to more portable Perl shebang 2017-05-14 11:20:44 +09:00
extract-sys-certs.pl scripts: Switch to more portable Perl shebang 2017-05-14 11:20:44 +09:00
extract-vmlinux
…
extract_xc3028.pl scripts: Switch to more portable Perl shebang 2017-05-14 11:20:44 +09:00
faddr2line scripts: fix faddr2line to work on last symbol 2017-10-12 12:26:52 -07:00
gcc-goto.sh
…
gcc-ld
…
gcc-plugin.sh gcc-plugins: abort builds cleanly when not supported 2016-08-08 17:49:05 -07:00
gcc-version.sh
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gcc-x86_32-has-stack-protector.sh
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gcc-x86_64-has-stack-protector.sh scripts/has-stack-protector: add -fno-PIE 2016-11-09 22:28:05 +01:00
gen_initramfs_list.sh Kbuild misc updates for 4.13 2017-07-07 15:09:09 -07:00
get_dvb_firmware scripts: Switch to more portable Perl shebang 2017-05-14 11:20:44 +09:00
get_maintainer.pl get_maintainer: Prepare for separate MAINTAINERS files 2017-08-08 11:09:31 -07:00
gfp-translate
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headerdep.pl scripts: Switch to more portable Perl shebang 2017-05-14 11:20:44 +09:00
headers.sh
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headers_check.pl scripts: Switch to more portable Perl shebang 2017-05-14 11:20:44 +09:00
headers_install.sh
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insert-sys-cert.c KEYS: Reserve an extra certificate symbol for inserting without recompiling 2016-02-26 15:30:20 +00:00
kallsyms.c scripts/kallsyms.c: ignore symbol type 'n' 2017-10-13 16:18:32 -07:00
kernel-doc kernel-doc parser mishandles declarations split into lines 2017-08-30 16:18:16 -06:00
ld-version.sh ld-version: Drop the 4th and 5th version components 2016-05-13 14:02:05 +02:00
link-vmlinux.sh kbuild: handle libs-y archives separately from built-in.o archives 2017-06-30 09:03:03 +09:00
makelst
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markup_oops.pl scripts: Switch to more portable Perl shebang 2017-05-14 11:20:44 +09:00
mkcompile_h scripts/mkcompile_h: Remove trailing spaces from compiler version 2017-06-19 22:48:15 +09:00
mkmakefile
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mksysmap mksysmap: Add h8300 local symbol pattern 2015-06-23 13:35:47 +09:00
mkuboot.sh
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module-common.lds module: set .init_array alignment to 8 2017-03-13 09:40:28 -07:00
namespace.pl scripts: Switch to more portable Perl shebang 2017-05-14 11:20:44 +09:00
objdiff scripts: objdiff: Ignore debug info when comparing 2017-03-11 11:13:38 +09:00
parse-maintainers.pl parse-maintainers: Move matching sections from MAINTAINERS 2017-08-08 11:16:14 -07:00
patch-kernel
…
pnmtologo.c
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profile2linkerlist.pl scripts: Switch to more portable Perl shebang 2017-05-14 11:20:44 +09:00
prune-kernel scripts: add "prune-kernel" script to clean up old kernel images 2016-02-09 10:09:52 -08:00
recordmcount.c ftrace: Allow for function tracing to record init functions on boot up 2017-03-24 20:51:49 -04:00
recordmcount.h recordmcount: Fix endianness handling bug for nop_mcount 2015-11-03 10:45:26 -05:00
recordmcount.pl scripts: Switch to more portable Perl shebang 2017-05-14 11:20:44 +09:00
setlocalversion kbuild: setlocalversion: print error to STDERR 2016-06-20 17:37:45 +02:00
show_delta
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sign-file.c sign-file: fix build error in sign-file.c with libressl 2017-02-10 12:43:47 +11:00
sortextable.c powerpc: Build-time sort the exception table 2016-11-14 11:11:51 +11:00
sortextable.h
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spelling.txt scripts/spelling.txt: add more spelling mistakes to spelling.txt 2017-10-03 17:54:23 -07:00
sphinx-pre-install docs-rst: don't require adjustbox anymore 2017-09-08 10:02:55 -06:00
stackdelta scripts: Switch to more portable Perl shebang 2017-05-14 11:20:44 +09:00
stackusage scripts: add stackusage script 2015-08-28 17:04:40 +02:00
tags.sh tags: honor COMPILED_SOURCE with apart output directory 2017-06-06 08:42:34 +09:00
unifdef.c
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ver_linux ver_linux: Use /usr/bin/awk instead of /bin/awk 2017-04-08 18:03:42 +02:00
xen-hypercalls.sh
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xz_wrap.sh
…