From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from simark.ca by simark.ca with LMTP id sQHJG0ZoZGoUhSwAWB0awg (envelope-from ) for ; Sat, 25 Jul 2026 03:39:50 -0400 Authentication-Results: simark.ca; dkim=pass (2048-bit key; unprotected) header.d=gmail.com header.i=@gmail.com header.a=rsa-sha256 header.s=20251104 header.b=Wwv2wJPz; dkim-atps=neutral Received: by simark.ca (Postfix, from userid 112) id 6D10C1E099; Sat, 25 Jul 2026 03:39:50 -0400 (EDT) X-Spam-Checker-Version: SpamAssassin 4.0.1 (2024-03-25) on simark.ca X-Spam-Level: X-Spam-Status: No, score=-5.4 required=5.0 tests=ARC_SIGNED,ARC_VALID,BAYES_00, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FROM,MAILING_LIST_MULTI, RCVD_IN_DNSWL_MED autolearn=unavailable autolearn_force=no version=4.0.1 Received: from vm01.sourceware.org (vm01.sourceware.org [IPv6:2620:52:6:3111::32]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange x25519 server-signature ECDSA (prime256v1) server-digest SHA256) (No client certificate requested) by simark.ca (Postfix) with ESMTPS id 19AA71E099 for ; Sat, 25 Jul 2026 03:39:50 -0400 (EDT) Received: from vm01.sourceware.org (localhost [IPv6:::1]) by sourceware.org (Postfix) with ESMTP id B6CC54BA23F8 for ; Sat, 25 Jul 2026 07:39:48 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org B6CC54BA23F8 Authentication-Results: sourceware.org; dkim=pass (2048-bit key, unprotected) header.d=gmail.com header.i=@gmail.com header.a=rsa-sha256 header.s=20251104 header.b=Wwv2wJPz Received: from mail-wm1-x32d.google.com (mail-wm1-x32d.google.com [IPv6:2a00:1450:4864:20::32d]) by sourceware.org (Postfix) with ESMTPS id 269484BA2E2F for ; Sat, 25 Jul 2026 07:39:25 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.2 sourceware.org 269484BA2E2F Authentication-Results: sourceware.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: sourceware.org; spf=pass smtp.mailfrom=gmail.com ARC-Filter: OpenARC Filter v1.0.0 sourceware.org 269484BA2E2F Authentication-Results: sourceware.org; arc=none smtp.remote-ip=2a00:1450:4864:20::32d ARC-Seal: i=1; a=rsa-sha256; d=sourceware.org; s=key; t=1784965165; cv=none; b=ebXDYQJwe/MSVByyRt3D8gIz82KpHVktOTYpldqdD0jeO9Yput00SwGV5AHVAbMIfuZHy0RUxfaoJtFJ3yoMG8k5tjjSMMiXCpWHiEJsrlV+0YSb1gGnI0iE4AQ/rKaIwVuqc190kdLBrZ4R/iBniE311IuGJQMMweL82qy6WQM= ARC-Message-Signature: i=1; a=rsa-sha256; d=sourceware.org; s=key; t=1784965165; c=relaxed/simple; bh=kLPk7s0SMwgSI9QmmxQdm5fod3A9YfNGiUWumIHJVcQ=; h=DKIM-Signature:Message-ID:Date:MIME-Version:Subject:To:From; b=dM3OsPvcExZ4diFay+4SZhXw7+BiBgPQkGcSLNnNYhI6gGVYUBVgbF2L2IYv5wl4z9cRKSJGlu1corDk/jQMebLny9PBfBNA+XGFcsqrdwyjzS16832X0dsVYNJHgk7O9fu8ecUH8YaWe399Yj05k4tQmdR6amLfEEsJQWvT6tY= ARC-Authentication-Results: i=1; sourceware.org; dkim=pass (2048-bit key, unprotected) header.d=gmail.com header.i=@gmail.com header.a=rsa-sha256 header.s=20251104 header.b=Wwv2wJPz DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 269484BA2E2F Received: by mail-wm1-x32d.google.com with SMTP id 5b1f17b1804b1-495635a85d2so9807585e9.0 for ; Sat, 25 Jul 2026 00:39:25 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20251104; t=1784965164; x=1785569964; darn=sourceware.org; h=content-transfer-encoding:content-type:in-reply-to:from:references :cc:to:content-language:subject:user-agent:mime-version:date :message-id:from:to:cc:subject:date:message-id:reply-to:content-type; bh=J0oe9MdmGI/GBgtV/tQ7E8HfsfAbqViyvREEXz0I9oU=; b=Wwv2wJPzrSnCpx2m6zNRqX9NAm6w/dEfxQMewtjEKFhAUAJ5WeGQLG15rBR0/V0iDQ sAcNnOLZYKssZF4GpAo9CiuFIE6Uvtz25vOifn7yINEXREg1EwJYgfiKumUc21N95S+y sXxBPHqTonbgNh0LyyPxyomnQ8znPEeZ7d5ypDceqv1hmAThpAwfErOOt1a4lAqGOkbR +QDMVGhDAbdEOY7b7m/fhthU5i7v9mFzpEf5rvCmvxIJnZlbS+ptSreIf+B+gACtsaSP wmT677xe1bN7gUjWVfO1GGvcDBqrcQHgo38fPbqlvc3ILarfb8LL6m7o8/bO/tEAQRu4 xcJg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1784965164; x=1785569964; h=content-transfer-encoding:content-type:in-reply-to:from:references :cc:to:content-language:subject:user-agent:mime-version:date :message-id:x-gm-gg:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to:content-type; bh=J0oe9MdmGI/GBgtV/tQ7E8HfsfAbqViyvREEXz0I9oU=; b=Ow0fhF8yP422bYqZ81im4S+XB2DrLpdwSXSA3eQv1M+Ti4BTy8+5ihp82a1NfGz1LD 86nVD2/kbjErhsBvgqRWJ28X9r+t28sYtFUp66UmwlCRHMdLKrT16rpZI8I5dXynJbhA JCZhsc9yqqv7a13dHw+Apj6mx6w46+uli5712+2beI9yztE9xnze6b/pgXOz85IDpxTY UmA7H297uNj4SPQk7duEfhOJikmUoZwEVESL6FY+lHn263ch8cmqELbxxqOjWhKGT+lY oOADn+bJPHuzlEhjJtH/5pc5En+VcKa0NuW5NiTIFm8kExEe28a1JpgwqGX5f0x41AhP mVoQ== X-Forwarded-Encrypted: i=1; AHgh+Rp9VowYJ/ix0i9xf/JHWNAvGtakNM3bId8kBM3gUzzfESX/RMvE0QIv1meqTCLO4ynqd/ZXKjl4otJKfw==@sourceware.org X-Gm-Message-State: AOJu0YzjRZXpK/0uivXV7ZjCQzq7gEPKzZLzu1UCUkTTRU1GyymHQWo0 rBWcjiOrprExAC9LjTQQv0HOkTxQZwUsnwuSRDTqKPbKrkhYj3d/bI4w X-Gm-Gg: AR+sD12U/Bevb6RRyT7wat4JuuYH+aKOMMuDw1mm6L76gQ1wvuO/IUKJmGTWBuFBKEx HCPqLrRN7w7qsobH62QM0OSZKpxupuDZZf83MGZFU61od3p0hnMF6lg13S70B5JDE7/UJztSfxf us8Miy5xyywmQg29QfvJ4tNBkqp62O0aKH+PmU3/5GQs9b/G2yzhCfsEm1ndtmcf6IiPL5Lz5T5 MCXjgBGqqBU7XUGWRpN58BTFl24vwkGDoVufTu7kEHC/saSr/JxE0KrH6gO8mchduU2PPeHzr5O FHmERR02D/qzzasK5h/tCSkAjH0ecFOJfLH+4SkxoYQrMWNACAeF9nfb9WkRGXbrBRECgXGVyIR kqGQer+m0YQCCrzA9mT2rTe4asPO+J9BHxrNyR8djuhtfYY+x2q3SdPiNCWCVbT+Y7ii1c/dL+X CQet4FTLfsmoklgs8= X-Received: by 2002:a05:600c:19c9:b0:492:4a50:41fe with SMTP id 5b1f17b1804b1-496b56ff171mr17254465e9.22.1784965163884; Sat, 25 Jul 2026 00:39:23 -0700 (PDT) Received: from [192.168.0.38] ([86.12.216.189]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-496b499ccb4sm50971795e9.10.2026.07.25.00.39.22 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Sat, 25 Jul 2026 00:39:23 -0700 (PDT) Message-ID: Date: Sat, 25 Jul 2026 08:39:22 +0100 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v3 2/5] [PATCH 2/5] gdb: Improve SIGSEGV diagnostics for POE faults Content-Language: en-US To: Srinath Parvathaneni , Matthieu Longo , "gdb-patches@sourceware.org" Cc: "guinevere@redhat.com" , "thiago.bauermann@linaro.org" , Ezra Sitorus , "simark@simark.ca" References: <20260714201530.78374-1-srinath.parvathaneni@arm.com> <20260714201530.78374-3-srinath.parvathaneni@arm.com> <3ae1161e-bc58-4cc4-a71d-c12b5b62d611@gmail.com> <3407ccb1-ad39-4572-b439-b508a4f4ea0d@arm.com> From: Luis In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-BeenThere: gdb-patches@sourceware.org X-Mailman-Version: 2.1.30 Precedence: list List-Id: Gdb-patches mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: gdb-patches-bounces~public-inbox=simark.ca@sourceware.org On 23/07/2026 10:03, Srinath Parvathaneni wrote: > > > >>>> +  /* For POE SEGSEGV, show additional information.  */ > >>> > >>> Is this really supposed to be POE SEGSEGV or is it a typo? > >>> > >> > >> For now, in my knowledge, AARCH64_SEGV_PKUERR is only used for POE. > >> However, it will also be used soon for another upcoming feature. > >> I would recommend to either simply eliminate the comment, or make it > more clear like > >> > >> /* For memory permission faults, e.g. due to a permission overlay > >>     restriction when feature POE is enabled.  */ > >> > >> Matthieu > > > >Sorry, I may not have been clear, but I was referring specifically to > >the SEGSEGV. Should it be SIGSEGV instead? > > Yes Luis, that's a typo. It should be SIGSEGV instead of SEGSEGV, thanks for > spotting it, I will update in the re-spin. > Got it. Thanks. > Regarding the comment itself, while SIGSEGV already implies a memory fault, > AARCH64_SEGV_PKUERR is currently only generated for Permission Overlay > violations. I think something like following would be more accurate > description. > > /* Additional information for SIGSEGV caused by a permission overlay > violation.  */ Yes, I think that reads a bit better.