[PATCH 0/7, GCC, V8M] ARMv8-M Security Extensions

["Andre Vieira (lists)" <Andre.SimoesDiasVieira@arm.com>]

[PATCH 0/7, GCC, V8M] ARMv8-M Security Extensions

Hello,

This is a respin of a previous patch series for ARMv8-M Security
Extensions. In this version I have removed one patch, rebased the rest
and changed some of them.

This patch series aims at implementing support for ARMv8-M's Security
Extensions. You can find the specification of ARMV8-M Security
Extensions in: ARM®v8-M Security Extensions: Requirements on Development
Tools
(http://infocenter.arm.com/help/topic/com.arm.doc.ecm0359818/index.html).

We currently:
- do not support passing arguments or returning on the stack for
cmse_nonsecure_{call,entry} functions,
- only test Security Extensions for -mfpu=fpv5-d16 and fpv5-sp-d16 and
only support single and double precision FPU's with d16.

Bootstrapped and tested on arm-none-linux-gnueabihf and tested on
arm-none-eabi with ARMv8-M Baseline and Mainline targets.

Andre Vieira (7):
 Add support for ARMv8-M's Security Extensions flag and intrinsics
 Handling ARMv8-M Security Extension's cmse_nonsecure_entry attribute
 ARMv8-M Security Extension's cmse_nonsecure_entry: __acle_se label and
bxns return
 ARMv8-M Security Extension's cmse_nonsecure_entry: clear registers
 Handling ARMv8-M Security Extension's cmse_nonsecure_call attribute
 ARMv8-M Security Extension's cmse_nonsecure_call: use
__gnu_cmse_nonsecure_call
 Added support for ARMV8-M Security Extension cmse_nonsecure_caller
intrinsic