From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 48) id CD6073858C52; Wed, 20 Jul 2022 20:46:04 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org CD6073858C52 From: "aoliva at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug target/81708] The x86 stack canary location should be customizable Date: Wed, 20 Jul 2022 20:46:04 +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: unknown X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: aoliva at gcc dot gnu.org X-Bugzilla-Status: REOPENED X-Bugzilla-Resolution: X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: ubizjak at gmail dot com X-Bugzilla-Target-Milestone: 8.0 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: Wed, 20 Jul 2022 20:46:04 -0000 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D81708 --- Comment #18 from Alexandre Oliva --- on x86_64 with -fPIC or -fpic, my_guard's address is indeed loaded from the= GOT with @GOTPCREL indeed on x86_64 with -fPIE or -fpie, however, it is used just as expected by the testcase. which should be fine as long as my_guard is required to be a link-time defined constant.=20=20 but if it is, then there's no point in loading its address from the GOT, no= t on x86_64 PIC, not on ia32 PIC/PIE. thus my question. something's fishy there.=