From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 48) id 8AE563858D39; Tue, 14 Dec 2021 00:09:16 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 8AE563858D39 From: "tomas.vanek at fbl dot cz" To: gdb-prs@sourceware.org Subject: [Bug gdb/28549] ARM/Cortex-M: improper stack unwinding when the target is in lockup state Date: Tue, 14 Dec 2021 00:09:16 +0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gdb X-Bugzilla-Component: gdb X-Bugzilla-Version: 9.2 X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: tomas.vanek at fbl dot cz X-Bugzilla-Status: WAITING X-Bugzilla-Resolution: X-Bugzilla-Priority: P2 X-Bugzilla-Assigned-To: luis.machado at linaro dot 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://sourceware.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 X-BeenThere: gdb-prs@sourceware.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Gdb-prs mailing list List-Unsubscribe: , List-Archive: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 14 Dec 2021 00:09:16 -0000 https://sourceware.org/bugzilla/show_bug.cgi?id=3D28549 --- Comment #23 from tomas.vanek at fbl dot cz --- Fredrik, it does not stop unwinding: (gdb) bt #0 #1 0x4fff0000 in ?? () #2 0x30000050 in pSecureErrorCallback () Backtrace stopped: previous frame identical to this frame (corrupt stack?) IMO returning outer_frame_id is crucial and yes, arm_m_exception_this_id() can be modified to return it if lockup is detected. In comparison with this= a new custom unwinder sniffing for lockup seems me cleaner. And with a small modification gdb 'backtrace' can print fancy unwinder name instead of just :=20 (gdb) bt #0 (gdb) --=20 You are receiving this mail because: You are on the CC list for the bug.=