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linux/arch/arm/include/asm
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Kees Cook 6a9af90a3b arm: move ELF_ET_DYN_BASE to 4MB 
Now that explicitly executed loaders are loaded in the mmap region, we
have more freedom to decide where we position PIE binaries in the
address space to avoid possible collisions with mmap or stack regions.

4MB is chosen here mainly to have parity with x86, where this is the
traditional minimum load location, likely to avoid historically
requiring a 4MB page table entry when only a portion of the first 4MB
would be used (since the NULL address is avoided).

For ARM the position could be 0x8000, the standard ET_EXEC load address,
but that is needlessly close to the NULL address, and anyone running PIE
on 32-bit ARM will have an MMU, so the tight mapping is not needed.

Link: http://lkml.kernel.org/r/1498154792-49952-2-git-send-email-keescook@chromium.org
Signed-off-by: Kees Cook <keescook@chromium.org>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: James Hogan <james.hogan@imgtec.com>
Cc: Pratyush Anand <panand@redhat.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Daniel Micay <danielmicay@gmail.com>
Cc: Dmitry Safonov <dsafonov@virtuozzo.com>
Cc: Grzegorz Andrejczuk <grzegorz.andrejczuk@intel.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Masahiro Yamada <yamada.masahiro@socionext.com>
Cc: Qualys Security Advisory <qsa@qualys.com>
Cc: Rik van Riel <riel@redhat.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 		2017-07-10 16:32:36 -07:00
..
hardware ARM/clk: move the ICST library to drivers/clk 2017-04-07 11:58:12 +02:00
mach ARM/PCI: Convert PCI scan API to pci_scan_root_bus_bridge() 2017-06-28 15:13:55 -05:00
xen xen: avoid type warning in xchg_xen_ulong 2017-06-08 15:07:38 -07:00
Kbuild signal: Remove non-uapi <asm/siginfo.h> 2017-06-04 15:11:47 +02:00
arch_gicv3.h ARM: gic-v3-its: Add 32bit support to GICv3 ITS 2016-11-29 09:14:48 +00:00
arch_timer.h clocksource: arch_timer: Fix code to use physical timers when requested 2014-12-04 23:30:26 -08:00
arm-cci.h arm-cci: Get rid of secure transactions for PMU driver 2015-03-27 13:44:35 +00:00
asm-offsets.h
…
assembler.h ARM: Prepare for randomized task_struct 2017-06-30 12:00:50 -07:00
atomic.h locking/atomic: Remove linux/atomic.h:atomic_fetch_or() 2016-06-16 10:48:32 +02:00
auxvec.h ARM: 8329/1: miscellaneous vdso infrastructure, preparation 2015-03-27 22:20:45 +00:00
bL_switcher.h ARM: bL_switcher: Add query interface to discover CPU affinities 2013-09-23 18:47:31 -04:00
barrier.h ARM: 8582/1: remove unused CONFIG_ARCH_HAS_BARRIERS 2016-07-02 11:01:08 +01:00
bitops.h ARM: 8679/1: bitops: Align prototypes to generic API 2017-06-18 22:36:33 +01:00
bitrev.h ARM: 8287/1: add bitrev.h file to support rbit instruction 2015-01-16 14:06:18 +00:00
bug.h ARM: 8455/1: define __BUG as asm(BUG_INSTR) without CONFIG_BUG 2015-12-03 00:02:29 +00:00
bugs.h
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cache.h
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cacheflush.h treewide: decouple cacheflush.h and set_memory.h 2017-05-08 17:15:14 -07:00
cachetype.h ARM: 8604/1: V7M: Add support for reading the CTR with read_cpuid_cachetype() 2016-09-06 15:51:07 +01:00
checksum.h ipv6: Pass proto to csum_ipv6_magic as __u8 instead of unsigned short 2016-03-13 23:55:13 -04:00
clocksource.h arm/arm64: arch_timer: Use archdata to indicate vdso suitability 2016-09-23 17:19:25 +01:00
cmpxchg.h ARM: 8443/1: Adding support for atomic half word exchange 2015-10-09 16:22:54 +01:00
compiler.h ARM: 8300/1: teach __asmeq that r11 == fp and r12 == ip 2015-02-10 10:23:11 +00:00
cp15.h ARM: Move system register accessors to asm/cp15.h 2016-09-22 13:22:10 +02:00
cpu.h
…
cpufeature.h ARM: 8663/1: wire up HWCAP/HWCAP2 feature bits to the CPU modalias 2017-03-30 19:45:52 +01:00
cpuidle.h ARM: cpuidle: add const qualifier to cpuidle_ops member in structures 2016-04-20 06:59:10 +02:00
cputype.h ARM: 8634/1: hw_breakpoint: blacklist Scorpion CPUs 2017-01-10 23:32:26 +00:00
cti.h
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dcc.h ARM: tty: Move HVC DCC assembly to arch/arm 2014-05-28 13:33:18 -07:00
delay.h ARM: 8619/1: udelay: document the various constants 2016-10-19 10:52:36 +01:00
device.h ARM: dma-mapping: Don't tear down third-party mappings 2017-05-30 11:31:33 +02:00
div64.h ARM: 8504/1: __arch_xprod_64(): small optimization 2016-02-11 15:33:37 +00:00
dma-contiguous.h drivers: dma-contiguous: clean source code and prepare for device tree 2013-08-27 09:18:29 +02:00
dma-iommu.h arm: remove arch specific dma_supported implementation 2017-06-28 06:54:45 -07:00
dma-mapping.h ARM: NOMMU: Introduce dma operations for noMMU 2017-06-30 10:03:09 -07:00
dma.h remove <asm/scatterlist.h> 2015-05-05 13:35:39 -06:00
dmi.h efi/arm: Enable DMI/SMBIOS 2017-06-05 17:50:44 +02:00
domain.h ARM: 8573/1: domain: move {set,get}_domain under config guard 2016-05-05 19:03:02 +01:00
ecard.h
…
edac.h EDAC: Cleanup atomic_scrub mess 2015-05-28 15:31:53 +02:00
efi.h efi/arm-stub: Correct FDT and initrd allocation rules for arm64 2017-04-05 12:27:23 +02:00
elf.h arm: move ELF_ET_DYN_BASE to 4MB 2017-07-10 16:32:36 -07:00
entry-macro-multi.S ARM: replace BSYM() with badr assembly macro 2015-05-08 17:33:50 +01:00
exception.h arch, ftrace: for KASAN put hard/soft IRQ entries into separate sections 2016-03-25 16:37:42 -07:00
fb.h
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fiq.h
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firmware.h ARM: EXYNOS: add exynos_get_boot_addr() helper 2015-06-06 02:17:56 +09:00
fixmap.h ARM: 8667/3: Fix memory attribute inconsistencies when using fixmap 2017-04-20 11:19:42 +01:00
flat.h ARM: 8594/1: enable binfmt_flat on systems with an MMU 2016-08-12 16:47:05 +01:00
floppy.h ARM: 8584/1: floppy: avoid gcc-6 warning 2016-07-02 11:02:13 +01:00
fncpy.h
…
fpstate.h
…
ftrace.h ARM: 8678/1: ftrace: Adds support for CONFIG_DYNAMIC_FTRACE_WITH_REGS 2017-06-18 22:25:16 +01:00
futex.h ARM: uaccess: provide uaccess_save_and_enable() and uaccess_restore() 2015-08-25 16:14:43 +01:00
glue-cache.h ARM: 8607/1: V7M: Wire up caches for V7M processors with cache support. 2016-09-06 15:51:08 +01:00
glue-df.h ARM: 8065/1: remove last use of CONFIG_CPU_ARM710 2014-05-30 01:12:30 +01:00
glue-pf.h
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glue-proc.h ARM: 8103/1: save/restore Cortex-A9 CP15 registers on suspend/resume 2014-07-18 12:29:37 +01:00
glue.h
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gpio.h ARM: delete old reference to ARM_GPIOLIB_COMPLEX 2014-06-30 21:37:39 +02:00
hardirq.h ARM: 8487/1: Remove IPI_CALL_FUNC_SINGLE 2015-12-22 12:09:43 +00:00
highmem.h kmap_atomic_to_page() has no users, remove it 2015-11-09 15:11:24 -08:00
hugetlb-3level.h
…
hugetlb.h mm/hugetlb: remove arch_prepare/release_hugepage from arch headers 2015-06-25 17:00:35 -07:00
hw_breakpoint.h ARM: 8598/1: remove traces of perf_ops_bp 2016-08-23 10:09:23 +01:00
hw_irq.h ARM: Remove ununsed set_irq_flags 2015-09-16 16:53:39 +02:00
hwcap.h ARM: 7981/1: add support for AT_HWCAP2 ELF auxv entry 2014-02-25 11:40:48 +00:00
hypervisor.h
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ide.h
…
idmap.h
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insn.h ARM: kprobes: enable OPTPROBES for ARM 32 2015-01-13 16:10:17 +00:00
io.h ARM: Implement pci_remap_cfgspace() interface 2017-04-24 13:53:13 -05:00
irq.h nmi_backtrace: add more trigger_*_cpu_backtrace() methods 2016-10-07 18:46:30 -07:00
irq_work.h arm: Tell irq work about self IPI support 2014-09-13 18:38:39 +02:00
irqflags.h ARM: 8422/1: enable imprecise aborts during early kernel startup 2015-09-22 08:13:56 +01:00
jump_label.h locking/static_keys: Add a new static_key interface 2015-08-03 11:34:15 +02:00
kexec.h ARM: kexec: fix kexec for Keystone 2 2016-08-02 19:35:29 -04:00
kgdb.h ARM: kdgb: use <asm/opcodes.h> for data to be assembled as intruction 2013-10-19 20:46:35 +01:00
kmap_types.h
…
kprobes.h kprobes: move kprobe declarations to asm-generic/kprobes.h 2017-02-27 18:43:45 -08:00
kvm_arm.h arm/arm64: KVM: add guest SEA support 2017-06-22 18:22:05 +01:00
kvm_asm.h ARM: KVM: Gracefully handle hyp-stubs being restored from under our feet 2017-04-09 07:49:31 -07:00
kvm_coproc.h KVM: arm: plug potential guest hardware debug leakage 2017-05-15 14:29:19 +02:00
kvm_emulate.h arm: KVM: Add Virtual Abort injection helper 2016-09-08 12:53:00 +02:00
kvm_host.h KVM: arm: Handle VCPU device attributes in guest.c 2017-06-08 16:59:55 +02:00
kvm_hyp.h arm/arm64: KVM: Perform local TLB invalidation when multiplexing vcpus on a single CPU 2016-11-04 17:56:28 +00:00
kvm_mmio.h KVM: arm/arm64: Export mmio_read/write_bus 2016-05-20 15:39:42 +02:00
kvm_mmu.h arm/arm64: KVM: Remove kvm_get_idmap_start 2017-04-09 07:49:32 -07:00
kvm_psci.h ARM/ARM64: KVM: Make kvm_psci_call() return convention more flexible 2014-04-30 04:18:57 -07:00
limits.h
…
linkage.h
…
mc146818rtc.h
…
mcpm.h ARM: MCPM: remove residency argument from mcpm_cpu_suspend() 2015-05-06 11:47:10 -04:00
mcs_spinlock.h ARM: 8098/1: mcs lock: implement wfe-based polling for MCS locking 2014-07-18 12:29:35 +01:00
memblock.h ARM: 8025/1: Get rid of meminfo 2014-06-01 01:17:12 +01:00
memory.h ARM: 8648/2: nommu: display vectors base 2017-02-28 11:06:14 +00:00
mmu.h ARM: 8329/1: miscellaneous vdso infrastructure, preparation 2015-03-27 22:20:45 +00:00
mmu_context.h sched/headers: Prepare to remove the <linux/mm_types.h> dependency from <linux/sched.h> 2017-03-02 08:42:37 +01:00
module.h ARM: 8662/1: module: split core and init PLT sections 2017-03-17 10:01:28 +00:00
mpu.h
…
mtd-xip.h
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neon.h ARM: add support for kernel mode NEON 2013-07-08 22:08:51 +01:00
nwflash.h
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opcodes-sec.h
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opcodes-virt.h
…
opcodes.h
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outercache.h ARM: move heavy barrier support out of line 2015-07-25 15:28:05 +01:00
page-nommu.h ARM: 8684/1: NOMMU: Remove unused KTHREAD_SIZE definition 2017-06-27 14:58:10 +01:00
page.h ARM: make vectors page inaccessible from userspace 2013-08-01 14:31:58 +01:00
paravirt.h arm: introduce CONFIG_PARAVIRT, PARAVIRT_TIME_ACCOUNTING and pv_time_ops 2015-12-21 14:40:54 +00:00
patch.h ARM: probes: move all probe code to dedicate directory 2015-01-09 09:36:50 +00:00
pci.h ARM/PCI: Use generic pci_mmap_resource_range() 2017-04-20 08:47:47 -05:00
percpu.h ARM: 8174/1: Use global stack register variable for percpu 2014-11-13 23:58:06 +00:00
perf_event.h arm: perf: Fix callchain parse error with kernel tracepoint events 2015-05-27 16:12:05 +01:00
pgalloc.h arm: get rid of superfluous __GFP_REPEAT 2016-07-26 16:19:19 -07:00
pgtable-2level-hwdef.h ARM: 8612/1: LPAE: initialize cache policy correctly 2016-09-12 12:12:30 +01:00
pgtable-2level-types.h
…
pgtable-2level.h ARM: 8578/1: mm: ensure pmd_present only checks the valid bit 2016-06-09 17:51:47 +01:00
pgtable-3level-hwdef.h ARM: 8612/1: LPAE: initialize cache policy correctly 2016-09-12 12:12:30 +01:00
pgtable-3level-types.h
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pgtable-3level.h ARM: 8579/1: mm: Fix definition of pmd_mknotpresent 2016-06-09 17:51:47 +01:00
pgtable-hwdef.h
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pgtable-nommu.h ARM: 8676/1: NOMMU: provide pgprot_device() macro 2017-06-05 10:29:40 +01:00
pgtable.h arch, mm: convert all architectures to use 5level-fixup.h 2017-03-09 11:48:47 -08:00
probes.h ARM: optprobes: execute instruction during restoring if possible. 2015-01-14 12:24:52 +00:00
proc-fns.h ARM: soft-reboot into same mode that we entered the kernel 2017-04-09 07:49:24 -07:00
processor.h locking/core: Provide common cpu_relax_yield() definition 2016-11-17 08:17:36 +01:00
procinfo.h
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prom.h of/fdt: move memreserve and dtb memory reservations into core 2014-04-30 00:59:17 -05:00
psci.h ARM: SoC cleanups for v4.5 2016-01-20 17:55:20 -08:00
ptrace.h ARM: save and reset the address limit when entering an exception 2016-07-07 16:01:01 +01:00
sections.h ARM: 8518/1: Use correct symbols for XIP_KERNEL 2016-02-11 15:43:14 +00:00
set_memory.h treewide: move set_memory_* functions away from cacheflush.h 2017-05-08 17:15:13 -07:00
setup.h ARM: 8495/1: ATAGS: move save_atags() to arch/arm/include/asm/setup.h 2016-01-04 11:26:00 +00:00
shmparam.h
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signal.h
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smp.h ARM: 8423/1: add const qualifier to smp_operations member in structures 2015-09-22 08:13:57 +01:00
smp_plat.h ARM: 8392/3: smp: Only expose /sys/.../cpuX/online if hotpluggable 2015-07-31 18:58:30 +01:00
smp_scu.h ARM: make it easier to check the CPU part number correctly 2014-07-18 12:29:02 +01:00
smp_twd.h
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sparsemem.h ARM: 8411/1: Add default SPARSEMEM settings 2016-02-16 16:35:21 +00:00
spinlock.h locking/spinlock, arch: Update and fix spin_unlock_wait() implementations 2016-06-14 11:55:15 +02:00
spinlock_types.h ARM: locks: prefetch the destination word for write prior to strex 2013-09-30 16:42:55 +01:00
stackprotector.h
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stacktrace.h ARM: 8070/1: Introduce arm_get_current_stack_frame() 2014-07-18 12:29:11 +01:00
stage2_pgtable.h kvm-arm: arm32: Introduce stage2 page table helpers 2016-04-21 14:57:26 +02:00
string.h
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suspend.h ARM: 8389/1: Add cpu_resume_arm() for firmwares that resume in ARM state 2015-06-12 21:17:17 +01:00
swab.h
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switch_to.h sched, arm: Remove finish_arch_switch() 2015-08-04 09:37:52 +02:00
sync_bitops.h ARM: 7989/1: Delete asm/system.h 2014-02-25 11:33:37 +00:00
syscall.h ARM: 8152/1: Convert pr_warning to pr_warn 2014-09-26 14:39:53 +01:00
system_info.h ARM: 8355/1: arch: Show the serial number from devicetree in cpuinfo 2015-05-08 10:42:35 +01:00
system_misc.h arm/arm64: KVM: add guest SEA support 2017-06-22 18:22:05 +01:00
tcm.h
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therm.h
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thread_info.h Merge branch 'fixes' of git://ftp.arm.linux.org.uk/~rmk/linux-arm 2015-09-14 12:24:10 -07:00
thread_notify.h
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timex.h ARM: drop <mach/timex.h> for !ARCH_MULTIPLATFORM, too 2013-12-20 17:17:16 +01:00
tlb.h mm: remove the page size change check in tlb_remove_page 2016-12-12 18:55:07 -08:00
tlbflush.h sched/headers: Prepare to remove the <linux/mm_types.h> dependency from <linux/sched.h> 2017-03-02 08:42:37 +01:00
tls.h ARM: 8178/1: fix set_tls for !CONFIG_KUSER_HELPERS 2014-09-30 16:55:23 +01:00
topology.h sched/topology: Rename topology_thread_cpumask() to topology_sibling_cpumask() 2015-05-27 15:22:15 +02:00
traps.h
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trusted_foundations.h treewide: remove redundant #include <linux/kconfig.h> 2016-10-11 15:06:33 -07:00
uaccess.h kill strlen_user() 2017-05-15 23:40:22 -04:00
ucontext.h
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unified.h ARM: replace BSYM() with badr assembly macro 2015-05-08 17:33:50 +01:00
unistd.h ARM: wire up new pkey syscalls 2016-10-19 10:18:47 +01:00
unwind.h
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uprobes.h ARM: add uprobes support 2014-03-18 16:39:40 -04:00
user.h
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v7m.h ARM: 8603/1: V7M: Add addresses for mem-mapped V7M cache operations 2016-09-06 15:51:06 +01:00
vdso.h ARM: 8329/1: miscellaneous vdso infrastructure, preparation 2015-03-27 22:20:45 +00:00
vdso_datapage.h ARM: 8329/1: miscellaneous vdso infrastructure, preparation 2015-03-27 22:20:45 +00:00
vfp.h ARM: vfp: Add vfp_disable for problematic platforms 2015-05-20 15:07:00 -07:00
vfpmacros.h
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vga.h
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virt.h ARM: hyp-stub/KVM: Kill __hyp_get_vectors 2017-04-09 07:49:34 -07:00
word-at-a-time.h ARM: 8322/1: keep .text and .fixup regions closer together 2015-03-29 23:11:56 +01:00
xor.h ARM: crypto: add NEON accelerated XOR implementation 2013-07-08 22:09:06 +01:00