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d05c513069
linux/arch/mips
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Marcin Nowakowski d05c513069 MIPS: tracing: disable uprobe/kprobe on compact branch instructions 
Current instruction decoder for uprobe/kprobe handler only handles
branches with delay slots. For compact branches the behaviour is rather
unpredictable - and depending on the encoding of a compact branch
instruction may result in one (or more) of:
- executing an instruction that follows a branch which wasn't in a delay
  slot and shouldn't have been executed
- incorrectly emulating a branch leading to a jump to a wrong location
- unexpected branching out of the single-stepped code and never reaching
  the breakpoint that should terminate the probe handler

Results of these actions are generally unpredictable, but can end up
with a probed application or kernel crash, so disable placing probes on
compact branches until they are handled properly.

Signed-off-by: Marcin Nowakowski <marcin.nowakowski@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/14336/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-10-06 17:37:40 +02:00
..
alchemy Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus 2016-05-19 10:02:26 -07:00
ar7 MIPS: ar7: use gpiochip data pointer 2016-02-19 09:51:43 +01:00
ath25 genirq: Remove irq argument from irq flow handlers 2015-09-16 15:47:51 +02:00
ath79 MIPS: ath79: Fix test for error return of clk_register_fixed_factor(). 2016-09-13 14:13:26 +02:00
bcm47xx MIPS: BCM47xx: Make serial explicitly non-modular 2016-10-04 16:13:57 +02:00
bcm63xx MIPS: BCM63xx: Let clk_disable() return immediately if clk is NULL 2016-10-04 16:13:57 +02:00
bmips MIPS: BMIPS: Support APPENDED_DTB 2016-10-06 17:31:02 +02:00
boot MIPS: BMIPS: Use interrupt-controller node name 2016-10-06 17:31:02 +02:00
cavium-octeon MIPS: Octeon: Delete unused cvmx-mdio.h 2016-10-04 16:13:57 +02:00
cobalt MIPS: Cobalt: Fix typo 2016-08-03 08:16:30 +02:00
configs MIPS: Malta: Use syscon-reboot driver to reboot 2016-10-06 17:31:01 +02:00
dec MIPS: DEC: Avoid la pseudo-instruction in delay slots 2016-09-29 18:59:49 +02:00
emma
fw MIPS: Fix misspellings in comments. 2016-04-03 12:32:09 +02:00
include irqchip: i8259: Remove unused i8259A_irq_pending 2016-10-06 17:31:00 +02:00
jazz MIPS: Jazz: Migrate to new 'set-state' interface 2015-09-03 12:07:50 +02:00
jz4740 tree-wide: replace config_enabled() with IS_ENABLED() 2016-08-04 08:50:07 -04:00
kernel MIPS: tracing: disable uprobe/kprobe on compact branch instructions 2016-10-06 17:37:40 +02:00
kvm MIPS: kvm: Audit and remove any unnecessary uses of module.h 2016-10-05 01:31:20 +02:00
lantiq MIPS: Lantiq: Make xrx200_phy_fw explicitly non-modular 2016-10-04 16:13:57 +02:00
lasat MIPS: Lasat: A couple off by one bugs in picvue_proc.c 2016-05-28 12:35:06 +02:00
lib MIPS: lib: Audit and remove any unnecessary uses of module.h 2016-10-05 01:31:20 +02:00
loongson32 MIPS: Add RTC support for Loongson1C board 2016-10-04 16:13:57 +02:00
loongson64 Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus 2016-08-06 09:13:11 -04:00
math-emu MIPS: Fix delay slot emulation count in debugfs 2016-09-25 01:59:16 +02:00
mm MIPS: mm: Audit and remove any unnecessary uses of module.h 2016-10-05 01:31:20 +02:00
mti-malta MIPS: Malta: Remove custom halt implementation 2016-10-06 17:31:01 +02:00
mti-sead3 MIPS: SEAD3: Remove custom read_persistent_clock 2016-10-06 17:10:59 +02:00
net Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus 2016-08-06 09:13:11 -04:00
netlogic dma-mapping: use unsigned long for dma_attrs 2016-08-04 08:50:07 -04:00
oprofile MIPS/Loongson-3: Convert oprofile to hotplug state machine 2016-07-15 10:40:29 +02:00
paravirt MIPS: SMP: Don't increment irq_count multiple times for call function IPIs 2015-08-03 09:25:12 +02:00
pci MIPS: pci: Audit and remove any unnecessary uses of module.h 2016-10-05 01:31:20 +02:00
pic32 Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus 2016-08-06 09:13:11 -04:00
pistachio Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus 2016-08-06 09:13:11 -04:00
pmcs-msp71xx MIPS: MSP71xx: Use __flush_cache_all instead of flush_cache_all. 2016-05-13 14:01:38 +02:00
pnx833x MIPS: Squash lines for simple wrapper functions 2016-10-04 16:13:57 +02:00
power
ralink MIPS: ralink: Make timer explicitly non-modular 2016-10-04 16:13:57 +02:00
rb532 MIPS: rb532: use gpiochip data pointer 2016-02-19 09:51:44 +01:00
sgi-ip22 rtc: ds1286: move header to linux/rtc 2016-07-08 16:23:11 +02:00
sgi-ip27 MIPS: Spelling fix lets -> let's 2016-05-28 12:35:09 +02:00
sgi-ip32 MIPS: IP32: Fix build errors in reset code in DS1685 platform hook. 2015-05-13 00:01:41 +02:00
sibyte MIPS: Sibyte: Fix Kconfig dependencies of SIBYTE_BUS_WATCHER 2016-05-09 12:00:03 +02:00
sni char/genrtc: remove asm-generic/rtc.h from mips 2016-06-04 00:23:36 +02:00
txx9 MIPS: PCI: Reduce stack frame usage 2016-10-04 16:13:57 +02:00
vdso MIPS: Build microMIPS VDSO for microMIPS kernels 2016-05-28 12:35:12 +02:00
vr41xx MIPS: VR41xx: Fix typo 2016-05-28 12:35:09 +02:00
xilfpga mips: Remove unnecessary of_platform_populate with default match table 2016-06-23 15:00:29 -05:00
Kbuild MIPS: Initial implementation of a VDSO 2015-11-11 08:36:36 +01:00
Kbuild.platforms MIPS: Add support for PIC32MZDA platform 2016-01-24 02:53:28 +01:00
Kconfig MIPS: Malta: Probe interrupt controllers via DT 2016-10-06 17:31:00 +02:00
Kconfig.debug MIPS: Remove compact branch policy Kconfig entries 2016-09-13 14:14:50 +02:00
Makefile MIPS: Remove compact branch policy Kconfig entries 2016-09-13 14:14:50 +02:00