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Suzuki K. Poulose 2d888f48e0 arm64: Emulate SETEND for AArch32 tasks 
Emulate deprecated 'setend' instruction for AArch32 bit tasks.

	setend [le/be] - Sets the endianness of EL0

On systems with CPUs which support mixed endian at EL0, the hardware
support for the instruction can be enabled by setting the SCTLR_EL1.SED
bit. Like the other emulated instructions it is controlled by an entry in
/proc/sys/abi/. For more information see :
	Documentation/arm64/legacy_instructions.txt

The instruction is emulated by setting/clearing the SPSR_EL1.E bit, which
will be reflected in the PSTATE.E in AArch32 context.

This patch also restores the native endianness for the execution of signal
handlers, since the process could have changed the endianness.

Note: All CPUs on the system must have mixed endian support at EL0. Once the
handler is registered, hotplugging a CPU which doesn't support mixed endian,
could lead to unexpected results/behavior in applications.

Signed-off-by: Suzuki K. Poulose <suzuki.poulose@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Punit Agrawal <punit.agrawal@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
 		2015-01-23 17:11:44 +00:00
..
vdso arm64: vdso: fix build error when switching from LE to BE 2014-07-30 15:06:35 +01:00
.gitignore
…
Makefile arm64: kernel: add support for cpu cache information 2015-01-15 11:55:07 +00:00
alternative.c arm64: add module support for alternatives fixups 2014-12-04 10:28:24 +00:00
arm64ksyms.c arm64: Add ftrace support 2014-05-29 09:08:08 +01:00
armv8_deprecated.c arm64: Emulate SETEND for AArch32 tasks 2015-01-23 17:11:44 +00:00
asm-offsets.c arm64: KVM: implement lazy world switch for debug registers 2014-07-11 04:57:46 -07:00
cacheinfo.c arm64: kernel: add support for cpu cache information 2015-01-15 11:55:07 +00:00
cpu_errata.c arm64: alternatives: fix pr_fmt string for consistency 2014-11-25 18:27:01 +00:00
cpu_ops.c arm64: kernel: enable PSCI cpu operations on UP systems 2014-07-18 15:23:25 +01:00
cpuidle.c arm64: kernel: introduce cpu_init_idle CPU operation 2014-09-12 10:48:55 +01:00
cpuinfo.c arm64: Track system support for mixed endian EL0 2015-01-23 17:02:19 +00:00
cputable.c
…
debug-monitors.c KVM/ARM New features for 3.17 include: 2014-08-05 09:47:45 +02:00
efi-entry.S arm64 updates for 3.19 2014-12-09 13:12:47 -08:00
efi-stub.c arm64/efi: efistub: don't abort if base of DRAM is occupied 2014-09-08 14:39:18 +01:00
efi.c arm64/efi: move virtmap init to early initcall 2015-01-22 14:59:25 +00:00
entry-fpsimd.S arm64: fpsimd: fix a typo in fpsimd_save_partial_state ENDPROC 2014-07-31 11:42:42 +01:00
entry-ftrace.S arm64: ftrace: eliminate literal pool entries 2014-11-07 15:04:49 +00:00
entry.S arm64: move to ESR_ELx macros 2015-01-15 12:24:15 +00:00
fpsimd.c arm64: fix bug for reloading FPSIMD state after cpu power off 2014-09-01 12:55:21 +01:00
ftrace.c arm64: Correct ftrace calls to aarch64_insn_gen_branch_imm() 2014-09-19 12:05:45 +01:00
head.S arm64: Move some head.text functions to executable section 2014-11-26 17:19:47 +00:00
hw_breakpoint.c arm64: is_compat_task is defined both in asm/compat.h and linux/compat.h 2014-05-12 16:43:29 +01:00
hyp-stub.S irqchip: gic-v3: Initial support for GICv3 2014-07-08 22:11:47 +00:00
image.h arm64: Update the Image header 2014-07-10 12:36:40 +01:00
insn.c arm64: use fixmap for text patching 2015-01-22 11:50:56 +00:00
io.c arm64: optimize memcpy_{from,to}io() and memset_io() 2014-11-06 17:25:27 +00:00
irq.c arm64: Treat handle_arch_irq as a function pointer 2014-11-25 15:56:44 +00:00
jump_label.c arm64: jump labels: NOP out NOP -> NOP replacement 2014-11-26 17:19:47 +00:00
kgdb.c arm64: Fix typos in KGDB macros 2014-09-25 15:35:41 +01:00
kuser32.S arm64: Add __NR_* definitions for compat syscalls 2014-07-10 11:02:40 +01:00
module.c arm64: fix missing asm/alternative.h include in kernel/module.c 2015-01-07 11:40:59 +00:00
pci.c arm64: Add architectural support for PCI 2014-09-30 17:08:57 -06:00
perf_event.c arm64: perf: Prevent wraparound during overflow 2014-12-04 10:26:54 +00:00
perf_regs.c perf: Move task_pt_regs sampling into arch code 2015-01-09 11:12:28 +01:00
process.c arm64: ASLR: Don't randomise text when randomise_va_space == 0 2014-10-24 15:47:49 +01:00
psci.c arm64 fixes: 2014-12-16 14:12:33 -08:00
ptrace.c arm64: add seccomp support 2014-11-28 10:24:59 +00:00
return_address.c arm64: LLVMLinux: Use global stack pointer in return_address() 2014-09-08 14:39:19 +01:00
setup.c arm64: implement generic IOMMU configuration 2015-01-23 16:44:16 +00:00
signal.c arm64: Use sigsp() 2014-08-06 13:03:45 +02:00
signal32.c arm64: Emulate SETEND for AArch32 tasks 2015-01-23 17:11:44 +00:00
sleep.S arm64: Move cpu_resume into the text section 2014-11-25 15:56:44 +00:00
smp.c arm64: add module support for alternatives fixups 2014-12-04 10:28:24 +00:00
smp_spin_table.c arm64: fix missing asm/io.h include in kernel/smp_spin_table.c 2015-01-07 11:40:59 +00:00
stacktrace.c arm64: LLVMLinux: Use current_stack_pointer in save_stack_trace_tsk 2014-09-08 14:39:19 +01:00
suspend.c arm64: kernel: fix __cpu_suspend mm switch on warm-boot 2014-12-23 16:38:50 +00:00
sys.c
…
sys32.S
…
sys_compat.c arm64: compat: align cacheflush syscall with arch/arm 2014-12-01 13:31:12 +00:00
time.c arm64: kernel: initialize broadcast hrtimer based clock event device 2014-05-30 17:48:13 +01:00
topology.c arm64: topology: Fix handling of multi-level cluster MPIDR-based detection 2014-11-25 15:56:43 +00:00
trace-events-emulation.h arm64: Trace emulation of AArch32 legacy instructions 2014-11-20 16:35:02 +00:00
traps.c arm64: decode ESR_ELx.EC when reporting exceptions 2015-01-15 12:24:22 +00:00
vdso.c arm64,ia64,ppc,s390,sh,tile,um,x86,mm: remove default gate area 2014-08-08 15:57:27 -07:00
vmlinux.lds.S arm64: add better page protections to arm64 2015-01-22 14:54:29 +00:00