Alex Smith 91ad11d7cc recordmcount/MIPS: Fix possible incorrect mcount_loc table entries in modules ... On MIPS calls to _mcount in modules generate 2 instructions to load the _mcount address (and therefore 2 relocations). The mcount_loc table should only reference the first of these, so the second is filtered out by checking the relocation offset and ignoring ones that immediately follow the previous one seen. However if a module has an _mcount call at offset 0, the second relocation would not be filtered out due to old_r_offset == 0 being taken to mean that the current relocation is the first one seen, and both would end up in the mcount_loc table. This results in ftrace_make_nop() patching both (adjacent) instructions to branches over the _mcount call sequence like so: 0xffffffffc08a8000: 04 00 00 10 b 0xffffffffc08a8014 0xffffffffc08a8004: 04 00 00 10 b 0xffffffffc08a8018 0xffffffffc08a8008: 2d 08 e0 03 move at,ra ... The second branch is in the delay slot of the first, which is defined to be unpredictable - on the platform on which this bug was encountered, it triggers a reserved instruction exception. Fix by initializing old_r_offset to ~0 and using that instead of 0 to determine whether the current relocation is the first seen. Signed-off-by: Alex Smith <alex.smith@imgtec.com> Cc: linux-kernel@vger.kernel.org Cc: stable@vger.kernel.org Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/7098/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>		2014-06-26 10:48:19 +01:00
..
basic	kbuild: trivial - use tabs for code indent where possible	2014-06-10 14:00:53 +02:00
coccinelle	coccicheck: Add unneeded return variable test	2014-06-10 14:36:30 +02:00
dtc	kbuild: trivial - remove trailing empty lines	2014-06-10 00:04:06 +02:00
genksyms	genksyms: fix typeof() handling	2014-04-03 16:20:52 -07:00
kconfig	Merge branch 'misc' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild	2014-06-12 21:29:20 -07:00
ksymoops
mod	Merge branch 'misc' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild	2014-06-12 21:29:20 -07:00
package	Merge branch 'misc' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild	2014-06-12 21:29:20 -07:00
rt-tester	kbuild: trivial - remove trailing empty lines	2014-06-10 00:04:06 +02:00
selinux	kbuild: trivial - remove trailing empty lines	2014-06-10 00:04:06 +02:00
tracing
.gitignore
analyze_suspend.py	PM / tools: new tool for suspend/resume performance optimization	2014-01-17 01:47:26 +01:00
asn1_compiler.c	X.509: remove possible code fragility: enumeration values not handled	2013-09-25 17:17:01 +01:00
bin2c.c
bloat-o-meter	scripts/bloat-o-meter: use .startswith rather than fragile slicing	2013-11-07 10:47:13 +01:00
bootgraph.pl	scripts/bootgraph.pl: Add graphic header	2014-04-08 17:15:15 +02:00
checkincludes.pl
checkkconfigsymbols.sh	scripts/checkkconfigsymbols.sh: replace echo -e with printf	2013-08-28 17:00:47 +02:00
checkpatch.pl	scripts/checkpatch.pl: device_initcall is not the only __initcall substitute	2014-06-04 16:54:20 -07:00
checkstack.pl	kbuild: trivial - remove trailing empty lines	2014-06-10 00:04:06 +02:00
checksyscalls.sh	scripts/checksyscalls.sh: Make renameat optional	2014-05-20 10:59:38 +02:00
checkversion.pl
cleanfile
cleanpatch
coccicheck
config	kbuild: trivial - remove trailing empty lines	2014-06-10 00:04:06 +02:00
conmakehash.c	kbuild: trivial - remove trailing spaces	2014-04-30 17:34:32 +02:00
decode_stacktrace.sh	decode_stacktrace: make stack dump output useful again	2014-06-10 15:29:43 -07:00
decodecode
depmod.sh
diffconfig	diffconfig: Update script to support python versions 2.5 through 3.3	2013-09-01 21:24:51 +02:00
docproc.c	kbuild: trivial - use tabs for code indent where possible	2014-06-10 14:00:53 +02:00
export_report.pl
extract-ikconfig
extract-vmlinux
gcc-goto.sh	arm64, jump label: detect %c support for ARM64	2014-01-08 15:21:29 +00:00
gcc-ld	Kbuild, lto: Add a gcc-ld script to let run gcc as ld	2014-02-13 20:25:02 -08:00
gcc-version.sh
gcc-x86_32-has-stack-protector.sh
gcc-x86_64-has-stack-protector.sh
gen_initramfs_list.sh	scripts/gen_initramfs_list.sh: fix flags for initramfs LZ4 compression	2014-03-04 07:55:48 -08:00
get_maintainer.pl	get_maintainer: fix detection of git repository	2014-02-10 16:01:40 -08:00
gfp-translate
headerdep.pl
headers_check.pl	headers_check: special case seqbuf_dump()	2014-01-23 16:36:55 -08:00
headers_install.sh
headers.sh	kbuild: trivial - remove trailing empty lines	2014-06-10 00:04:06 +02:00
kallsyms.c	kbuild: trivial - use tabs for code indent where possible	2014-06-10 14:00:53 +02:00
Kbuild.include	Merge branch 'kbuild' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild	2014-04-07 17:52:31 -07:00
kernel-doc	Merge branch 'misc' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild	2013-11-15 14:09:15 -08:00
ld-version.sh	Kbuild, lto: add ld-version and ld-ifversion macros	2014-02-13 20:25:00 -08:00
Lindent
link-vmlinux.sh	kallsyms: fix percpu vars on x86-64 with relocation.	2014-03-17 14:55:27 +10:30
Makefile	kbuild: do not add "selinux" to subdir- twice	2014-06-09 23:24:59 +02:00
Makefile.asm-generic	kbuild: trivial - remove trailing empty lines	2014-06-10 00:04:06 +02:00
Makefile.build	kbuild: trivial - remove trailing spaces	2014-04-30 17:34:32 +02:00
Makefile.clean
Makefile.extrawarn	kbuild: move extra gcc checks to scripts/Makefile.extrawarn	2014-04-16 23:28:41 +02:00
Makefile.fwinst	firmware: Simplify directory creation	2014-05-14 22:43:04 +02:00
Makefile.headersinst
Makefile.help
Makefile.host	Merge branch 'misc' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild	2014-06-12 21:29:20 -07:00
Makefile.lib	kbuild: trivial - remove trailing spaces	2014-04-30 17:34:32 +02:00
Makefile.modbuiltin
Makefile.modinst
Makefile.modpost	modpost: Optionally ignore secondary errors seen if a single module build fails	2013-09-23 15:45:03 +09:30
Makefile.modsign
makelst
markup_oops.pl	kbuild: trivial - remove trailing empty lines	2014-06-10 00:04:06 +02:00
mkcompile_h	kbuild: trivial - remove trailing spaces	2014-04-30 17:34:32 +02:00
mkmakefile	kbuild: support simultaneous "make %config" and "make all"	2014-04-30 16:45:16 +02:00
mksysmap	kbuild: trivial - remove trailing empty lines	2014-06-10 00:04:06 +02:00
mkuboot.sh
mkversion
module-common.lds
namespace.pl
objdiff	scripts: objdiff: support directories for the augument of record command	2014-06-10 14:59:33 +02:00
patch-kernel	kbuild: trivial - remove trailing spaces	2014-04-30 17:34:32 +02:00
pnmtologo.c	kbuild: trivial - remove trailing empty lines	2014-06-10 00:04:06 +02:00
profile2linkerlist.pl
recordmcount.c	Merge branch 'misc' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild	2014-06-12 21:29:20 -07:00
recordmcount.h	recordmcount/MIPS: Fix possible incorrect mcount_loc table entries in modules	2014-06-26 10:48:19 +01:00
recordmcount.pl	ftrace: Add arm64 support to recordmcount	2014-05-29 09:04:31 +01:00
setlocalversion	Fix detectition of kernel git repository in setlocalversion script [take #2]	2014-01-03 14:48:42 +01:00
show_delta	kbuild: trivial - remove trailing empty lines	2014-06-10 00:04:06 +02:00
sign-file
sortextable.c	xtensa: enable sorting extable at build time	2014-04-02 01:35:50 +04:00
sortextable.h	scripts/sortextable: support objects with more than 64K sections.	2013-11-13 12:09:00 +09:00
tags.sh	kbuild: trivial - use tabs for code indent where possible	2014-06-10 14:00:53 +02:00
unifdef.c
ver_linux
xz_wrap.sh