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Prem Karat ccd3988086 MIPS: Enable VDSO randomization 
Based on commit 1091458d09e1a (mmap randomization)

For 32-bit address spaces randomize within a
16MB space, for 64-bit within a 256MB space.

Test Results:
------------
Without Patch (VDSO is not randomized)
---------------------------------------
root@Maleo:~# ./aslr vdso
FAIL: ASLR not functional (vdso always at 0x7fff7000)

root@Maleo:~# ./aslr rekey vdso
pre_val==cur_val
value=0x7fff7000

With patch:(VDSO is randmoized and doesn't interfere with stack)
----------------------------------------------------------------
root@cavium-octeon2:~# ./aslr rekey vdso
pre_val!=cur_val
previous_value=0x7f830ea2
current_value=0x776e2000
root@cavium-octeon2:~# ./aslr rekey vdso
pre_val!=cur_val
previous_value=0x7fb0cea2
current_value=0x77209000
root@cavium-octeon2:~# ./aslr rekey vdso
pre_val!=cur_val
previous_value=0x7f985ea2
current_value=0x7770c000
root@cavium-octeon2:~# ./aslr rekey vdso
pre_val!=cur_val
previous_value=0x7fbc6ea2
current_value=0x7fe25000

Maps file output:
-------------------------
root@cavium-octeon2:~# ./aslr rekey maps
78584000-785a5000 rwxp 00000000 00:00 0                                  [heap]
7f9d0000-7f9f1000 rw-p 00000000 00:00 0                                  [stack]
7ffa5000-7ffa6000 r-xp 00000000 00:00 0                                  [vdso]

root@cavium-octeon2:~# ./aslr rekey maps
77de0000-77e01000 rwxp 00000000 00:00 0                                  [heap]
7f91b000-7f93c000 rw-p 00000000 00:00 0                                  [stack]
7ff99000-7ff9a000 r-xp 00000000 00:00 0                                  [vdso]

root@cavium-octeon2:~# ./aslr rekey maps
77d7f000-77da0000 rwxp 00000000 00:00 0                                  [heap]
7fc2a000-7fc4b000 rw-p 00000000 00:00 0                                  [stack]
7fe09000-7fe0a000 r-xp 00000000 00:00 0                                  [vdso]

root@cavium-octeon2:~# ./aslr rekey maps
7794c000-7794d000 r-xp 00000000 00:00 0                                  [vdso]
77e4b000-77e6c000 rwxp 00000000 00:00 0                                  [heap]
7f6e7000-7f708000 rw-p 00000000 00:00 0                                  [stack]
root@cavium-octeon2:~#

Signed-off-by: Prem Karat <pkarat@mvista.com>
Cc: linux-mips@linux-mips.org
Cc: sergei.shtylyov@cogentembedded.com
Cc: ddaney.cavm@gmail.com
Patchwork: https://patchwork.linux-mips.org/patch/6812
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2014-11-24 07:45:38 +01:00
..
alchemy
MIPS: Alchemy: Remove direct access to prepare_count field of struct clk
2014-11-24 07:45:17 +01:00
ar7
mips: Convert pr_warning to pr_warn
2014-11-24 07:44:51 +01:00
ath25
MIPS: ath25: add Wireless device support
2014-11-24 07:45:29 +01:00
ath79
MIPS: ath79: Read the initrd address from the firmware environment
2014-11-24 07:45:30 +01:00
bcm47xx
MIPS: BCM47XX: Clean up nvram header
2014-11-24 07:45:08 +01:00
bcm63xx
MIPS: Remove useless parentheses
2014-11-24 07:44:49 +01:00
bcm3384
MIPS: bcm3384: Initial commit of bcm3384 platform support
2014-11-24 07:45:13 +01:00
boot
MIPS: bcm3384: Initial commit of bcm3384 platform support
2014-11-24 07:45:13 +01:00
cavium-octeon
MIPS: Octeon: Mark octeon_model_get_string() with __init
2014-11-24 07:45:32 +01:00
cobalt
MIPS: Cobalt: Move to 8250/16550 serial early printk driver
2013-10-29 21:24:38 +01:00
configs
MIPS: bcm3384: Initial commit of bcm3384 platform support
2014-11-24 07:45:13 +01:00
dec
Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus
2014-06-09 18:10:34 -07:00
emma
MIPS: Remove panic_timeout settings
2013-11-26 12:12:27 +01:00
fw
MIPS: FW: Use kstrtoul() to parse unsigned long from the fw environment
2014-11-24 07:45:26 +01:00
include
MIPS: Remove a temporary hack for debugging cache flushes in SMTC configuration
2014-11-24 07:45:37 +01:00
jazz
…
jz4740
This is the bulk of GPIO changes for the v3.17 development
2014-08-08 18:00:35 -07:00
kernel
MIPS: Enable VDSO randomization
2014-11-24 07:45:38 +01:00
kvm
KVM: remove garbage arg to *hardware_{en,dis}able
2014-08-29 16:35:55 +02:00
lantiq
MIPS: lantiq: add missing spi clock on falcon SoC
2014-11-24 07:45:18 +01:00
lasat
MIPS: Lasat: Add missing CONFIG_PROC_FS dependency to PICVUE_PROC
2014-10-21 17:35:44 +02:00
lib
MIPS: lib: mips-atomic.c: Remove obsolete ifdefery
2014-11-24 07:45:33 +01:00
loongson
MIPS: loongson: common: rtc: make loongson_rtc_resources static
2014-11-24 07:45:35 +01:00
loongson1
MIPS: Loongson1B: Add a clockevent/clocksource using PWM Timer
2014-11-24 07:45:09 +01:00
math-emu
MIPS: Support for hybrid FPRs
2014-11-24 07:45:07 +01:00
mm
MIPS: mm: Only build one microassembler that is suitable
2014-11-24 07:45:36 +01:00
mti-malta
clocksource: mips-gic: Move gic_frequency to clocksource driver
2014-11-24 07:45:15 +01:00
mti-sead3
MIPS: Move gic.h to include/linux/irqchip/mips-gic.h
2014-11-24 07:44:59 +01:00
net
Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus
2014-10-18 14:24:36 -07:00
netlogic
MIPS: Netlogic: Move device-trees to arch/mips/boot/dts/
2014-09-22 13:35:50 +02:00
oprofile
MIPS: oprofile: Backtrace: don't fail on leaf functions
2014-11-24 07:45:31 +01:00
paravirt
mips: Update the email address of Geert Uytterhoeven
2014-06-02 16:34:41 +02:00
pci
MIPS: ath25: add AR2315 PCI host controller driver
2014-11-24 07:45:28 +01:00
pmcs-msp71xx
MIPS: Remove useless parentheses
2014-11-24 07:44:49 +01:00
pnx833x
MIPS: PNX833x: Remove checks for CONFIG_I2C_PNX0105
2014-05-23 15:12:39 +02:00
power
nosave: consolidate __nosave_{begin,end} in <asm/sections.h>
2014-10-09 22:26:04 -04:00
ralink
MIPS: ralink: add rt2880 pci driver
2014-11-24 07:45:25 +01:00
rb532
MIPS: Remove useless parentheses
2014-11-24 07:44:49 +01:00
sgi-ip22
MIPS: Remove useless parentheses
2014-11-24 07:44:49 +01:00
sgi-ip27
MIPS: Remove useless parentheses
2014-11-24 07:44:49 +01:00
sgi-ip32
…
sibyte
MIPS: Remove useless parentheses
2014-11-24 07:44:49 +01:00
sni
MIPS: Cleanup CP0 PRId and CP1 FPIR register access masks
2013-09-18 20:25:19 +02:00
txx9
mips: Convert pr_warning to pr_warn
2014-11-24 07:44:51 +01:00
vr41xx
MIPS: Idle: Consolidate all declarations in <asm/idle.h>.
2013-05-22 01:34:27 +02:00
Kbuild
MIPS: net: Add BPF JIT
2014-05-30 16:10:20 +02:00
Kbuild.platforms
MIPS: ath25: add common parts
2014-11-24 07:45:26 +01:00
Kconfig
MIPS: Kconfig: Only allow 32-bit microMIPS builds
2014-11-24 07:45:36 +01:00
Kconfig.debug
MIPS: Kconfig option to better exercise/debug hybrid FPRs
2014-11-24 07:45:08 +01:00
Makefile
MIPS: IP22/IP32: Add line to arch/mips/Makefile archhelp about vmlinux.32
2014-11-24 07:45:33 +01:00