From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 48) id 484103858415; Mon, 18 Oct 2021 16:59:03 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 484103858415 From: "nsz at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug target/102768] [feature request] Add support for aarch64 shadow call stack Date: Mon, 18 Oct 2021 16:59:03 +0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: target X-Bugzilla-Version: 12.0 X-Bugzilla-Keywords: X-Bugzilla-Severity: enhancement X-Bugzilla-Who: nsz at gcc dot gnu.org X-Bugzilla-Status: UNCONFIRMED X-Bugzilla-Resolution: X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org X-Bugzilla-Target-Milestone: --- X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: Message-ID: In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 X-BeenThere: gcc-bugs@gcc.gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Gcc-bugs mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 18 Oct 2021 16:59:03 -0000 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D102768 --- Comment #3 from nsz at gcc dot gnu.org --- well, protection mechanisms are rarely equivalent. neither scs nor traditional stack protector are perfect. to me compiler support for freestanding environments such as linux makes sense. i cannot immediately tell if libc support would work. (android is not a good indicator of what can be done in linux userspace: the android abi is broken between releases while glibc is abi stable, bionic can do hacks in longjmp/setcontext that is not acceptable in glibc and android does not have mixed toolchain issues such as old unwinder tries to unwind across a new binary.)=