Re: [Patch 6/8, Arm. GCC] Add pointer authentication for stack-unwinding runtime. [Was RE: [Patch 5/7, Arm. GCC] Add pointer authentication for stack-unwinding runtime.]

On 28/10/2021 12:43, Tejas Belagod via Gcc-patches wrote: -Original Message- From: Gcc-patches On Behalf Of Tejas Belagod via Gcc-patches Sent: Friday, October 8, 2021 1:18 PM To: gcc-patches@gcc.gnu.org Subject: [Patch 5/7, Arm. GCC] Add pointer authentication for stack

[Patch 6/8, Arm. GCC] Add pointer authentication for stack-unwinding runtime. [Was RE: [Patch 5/7, Arm. GCC] Add pointer authentication for stack-unwinding runtime.]

> -Original Message- > From: Gcc-patches bounces+belagod=gcc.gnu@gcc.gnu.org> On Behalf Of Tejas Belagod via > Gcc-patches > Sent: Friday, October 8, 2021 1:18 PM > To: gcc-patches@gcc.gnu.org > Subject: [Patch 5/7, Arm. GCC] Add pointer authentication for stack

[Patch 5/7, Arm. GCC] Add pointer authentication for stack-unwinding runtime.

Hi, This patch adds authentication for when the stack is unwound when an exception is taken. All the changes here are done to the runtime code in libgcc's unwinder code for Arm target. All the changes are guarded under defined (__ARM_FEATURE_PAC_DEFAULT) and activates only if the +pacbti feature