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974310d047
linux/arch/arm
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Jon Medhurst 974310d047 arm: kprobes: Align stack to 8-bytes in test code 
kprobes test cases need to have a stack that is aligned to an 8-byte
boundary because they call other functions (and the ARM ABI mandates
that alignment) and because test cases include 64-bit accesses to the
stack. Unfortunately, GCC doesn't ensure this alignment for inline
assembler and for the code in question seems to always misalign it by
pushing just the LR register onto the stack. We therefore need to
explicitly perform stack alignment at the start of each test case.

Without this fix, some test cases will generate alignment faults on
systems where alignment is enforced. Even if the kernel is configured to
handle these faults in software, triggering them is ugly. It also
exposes limitations in the fault handling code which doesn't cope with
writes to the stack. E.g. when handling this instruction

   strd r6, [sp, #-64]!

the fault handling code will write to a stack location below the SP
value at the point the fault occurred, which coincides with where the
exception handler has pushed the saved register context. This results in
corruption of those registers.

Signed-off-by: Jon Medhurst <tixy@linaro.org>
2017-03-21 16:24:19 +00:00
..
boot Merge branch 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm 2017-02-28 11:50:53 -08:00
common sched/headers: Prepare to move signal wakeup & sigpending methods from <linux/sched.h> into <linux/sched/signal.h> 2017-03-02 08:42:32 +01:00
configs ARM: deconfig: fix the moxart defconfig 2017-03-02 23:08:28 +01:00
crypto crypto: arm/crc32 - add build time test for CRC instruction support 2017-03-01 19:47:53 +08:00
firmware
include KVM fixes for v4.11-rc2 2017-03-11 14:24:58 -08:00
kernel sched/headers: Move task->mm handling methods to <linux/sched/mm.h> 2017-03-03 01:43:28 +01:00
kvm KVM: arm/arm64: Enable KVM_CAP_NR_MEMSLOTS on arm/arm64 2017-03-09 09:13:39 +00:00
lib ARM: 8658/1: uaccess: fix zeroing of 64-bit get_user() 2017-02-16 15:58:32 +00:00
mach-alpine ARM: 8641/1: treewide: Replace uses of virt_to_phys with __pa_symbol 2017-02-28 11:06:10 +00:00
mach-artpec
mach-asm9260
mach-aspeed
mach-at91
mach-axxia ARM: 8641/1: treewide: Replace uses of virt_to_phys with __pa_symbol 2017-02-28 11:06:10 +00:00
mach-bcm sched/headers: Prepare for new header dependencies before moving code to <linux/sched/clock.h> 2017-03-02 08:42:27 +01:00
mach-berlin ARM: 8646/1: mmu: decouple VECTORS_BASE from Kconfig 2017-02-28 11:06:12 +00:00
mach-clps711x
mach-cns3xxx
mach-davinci ARM: SoC platform updates 2017-02-23 15:33:54 -08:00
mach-digicolor
mach-dove
mach-ebsa110
mach-efm32
mach-ep93xx RTC for 4.11 2017-02-27 19:59:21 -08:00
mach-exynos Merge branch 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm 2017-02-28 11:50:53 -08:00
mach-footbridge
mach-gemini
mach-highbank
mach-hisi Merge branch 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm 2017-02-28 11:50:53 -08:00
mach-imx Merge branch 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm 2017-02-28 11:50:53 -08:00
mach-integrator
mach-iop13xx
mach-iop32x
mach-iop33x
mach-ixp4xx
mach-keystone
mach-ks8695
mach-lpc18xx
mach-lpc32xx
mach-mediatek ARM: 8641/1: treewide: Replace uses of virt_to_phys with __pa_symbol 2017-02-28 11:06:10 +00:00
mach-meson
mach-mmp
mach-moxart
mach-mv78xx0
mach-mvebu Merge branch 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm 2017-02-28 11:50:53 -08:00
mach-mxs
mach-netx
mach-nomadik
mach-nspire
mach-omap1 ARM: SoC platform updates 2017-02-23 15:33:54 -08:00
mach-omap2 sched/headers: Prepare for new header dependencies before moving code to <linux/sched/clock.h> 2017-03-02 08:42:27 +01:00
mach-orion5x RTC for 4.11 2017-02-27 19:59:21 -08:00
mach-oxnas
mach-picoxcell
mach-prima2 ARM: 8641/1: treewide: Replace uses of virt_to_phys with __pa_symbol 2017-02-28 11:06:10 +00:00
mach-pxa Merge branch 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm 2017-02-28 11:50:53 -08:00
mach-qcom
mach-realview ARM: 8641/1: treewide: Replace uses of virt_to_phys with __pa_symbol 2017-02-28 11:06:10 +00:00
mach-rockchip Merge branch 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm 2017-02-28 11:50:53 -08:00
mach-rpc sched/headers: Prepare for new header dependencies before moving code to <linux/sched/mm.h> 2017-03-02 08:42:28 +01:00
mach-s3c24xx Merge branch 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm 2017-02-28 11:50:53 -08:00
mach-s3c64xx Merge branch 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm 2017-02-28 11:50:53 -08:00
mach-s5pv210 Merge branch 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm 2017-02-28 11:50:53 -08:00
mach-sa1100 ARM: 8641/1: treewide: Replace uses of virt_to_phys with __pa_symbol 2017-02-28 11:06:10 +00:00
mach-shmobile Merge branch 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm 2017-02-28 11:50:53 -08:00
mach-socfpga ARM: 8641/1: treewide: Replace uses of virt_to_phys with __pa_symbol 2017-02-28 11:06:10 +00:00
mach-spear ARM: 8641/1: treewide: Replace uses of virt_to_phys with __pa_symbol 2017-02-28 11:06:10 +00:00
mach-sti ARM: 8641/1: treewide: Replace uses of virt_to_phys with __pa_symbol 2017-02-28 11:06:10 +00:00
mach-stm32
mach-sunxi Merge branch 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm 2017-02-28 11:50:53 -08:00
mach-tango ARM: 8641/1: treewide: Replace uses of virt_to_phys with __pa_symbol 2017-02-28 11:06:10 +00:00
mach-tegra Merge branch 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm 2017-02-28 11:50:53 -08:00
mach-u300
mach-uniphier
mach-ux500 ARM: SoC: late DT updates for v4.11 2017-03-03 16:15:48 -08:00
mach-versatile
mach-vexpress ARM: 8641/1: treewide: Replace uses of virt_to_phys with __pa_symbol 2017-02-28 11:06:10 +00:00
mach-vt8500
mach-w90x900
mach-zx ARM: 8641/1: treewide: Replace uses of virt_to_phys with __pa_symbol 2017-02-28 11:06:10 +00:00
mach-zynq ARM: 8641/1: treewide: Replace uses of virt_to_phys with __pa_symbol 2017-02-28 11:06:10 +00:00
mm sched/headers: Prepare to remove the <linux/mm_types.h> dependency from <linux/sched.h> 2017-03-02 08:42:37 +01:00
net
nwfpe sched/headers: Move task_struct::signal and task_struct::sighand types and accessors into <linux/sched/signal.h> 2017-03-03 01:43:37 +01:00
oprofile
plat-iop
plat-omap
plat-orion ARM: orion: Register DSA switch as a MDIO device 2017-02-07 10:51:47 -05:00
plat-pxa
plat-samsung
plat-versatile
probes arm: kprobes: Align stack to 8-bytes in test code 2017-03-21 16:24:19 +00:00
tools
vdso
vfp sched/headers: Prepare for new header dependencies before moving code to <linux/sched/signal.h> 2017-03-02 08:42:29 +01:00
xen Merge branch 'stable/for-linus-4.11' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/swiotlb 2017-03-07 10:23:17 -08:00
Kconfig Merge branch 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm 2017-02-28 11:50:53 -08:00
Kconfig-nommu
Kconfig.debug arch: Move CONFIG_DEBUG_RODATA and CONFIG_SET_MODULE_RONX to be common 2017-02-07 12:32:52 -08:00
Makefile