From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pj1-f74.google.com (mail-pj1-f74.google.com [209.85.216.74]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id EEA39192B85 for ; Wed, 29 Jan 2025 07:23:47 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.216.74 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1738135429; cv=none; b=l0nDU8I42coylvpNN1R/SZ4geEh3GK0Vkfzn41sfW8ZDXyLCRApZPKc1qMTEmAYkxGQMxAcWY9HNprAOLkuZat/yzcBWsRJF55HEG6yvHCLylqzGpORnR9FIwtamv5K6zCgix06ny0tpDtvU1gpQwXoR/YQ3qKfNHdYhp6nV/+E= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1738135429; c=relaxed/simple; bh=to5O8NoTB/c/DDyXIccxxNZqz1dxeSJFdLztzKRAPko=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=Zoyqo7FRH3m9SCxNyZq2Q/hA8B4/lglHUgr+EXcNGM56z25LY88Ppr9D71nzCyiqG/tMStZ/7PvM45hBxXRARpIXbJ+vfkZp36zSDqkutQmsaq0+oJq7hUWt+Uh8LlVWugMFOPVZnH0O8z7ryZcOnsLCjplcA4mQo0cta8GTZ7Q= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--wnliu.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=3PfbrpvD; arc=none smtp.client-ip=209.85.216.74 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=flex--wnliu.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="3PfbrpvD" Received: by mail-pj1-f74.google.com with SMTP id 98e67ed59e1d1-2ef9dbeb848so12216097a91.0 for ; Tue, 28 Jan 2025 23:23:47 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1738135427; x=1738740227; darn=vger.kernel.org; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=to5O8NoTB/c/DDyXIccxxNZqz1dxeSJFdLztzKRAPko=; b=3PfbrpvDaRzsZHdX2XNU6Yxb1pAGM0OkvK0MHRnOLTYrSWqL90usiCZdKVTlFm0oH4 ZfXCCdaG8ZSHlNT3OxVJRZVfe9iszZHjAhsyHVV/thqKDSFCFBB2v/aaIVZNIdaPuafU J6F7USMNyR3zQkmM0+waaTI5q2eb4GDAfpsaVHdpts4AQi1vrF5QfAVm/z1JO6XuHhYa SWMaIDznYYS0XiO591Twvmn8DSvsEwQNojhRmGMJFFcu8xq5yiecivhXVtn8BV08kQiz nrwgPT1HznHDt1Vi/L3kBB390wPn1crgRN+ay6f99hfF+Pbymh6t26jFFqMsTVNwOYjy Qnuw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1738135427; x=1738740227; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=to5O8NoTB/c/DDyXIccxxNZqz1dxeSJFdLztzKRAPko=; b=YEGdu4maNgx1qnP/azTEEoLnxAZqoRLGiUjR6w7OY40h1vcV5aDBDv+5GO5bNYQ4VR yfEPb/8bQhv+TE952rZERxUPZ0J5WtT4tz3IHgv8OkGi884vNA3ML5UhosfEg2msTK03 DwkwnyFGpLc9g1b0a38K2uKxjAgNa61fz419S1KOG5IKjXWa+rMkejYLHEX0rzMUDVv1 Jt/AM9KM+Oi2cyPD2l4cq4E0x3bqtwIbXVBr7Z6JQMfw5ZUXmKlIH+SJ4YJmaRUQkFQ7 9vD0lQCSZKMgmXft2oxc+2rrH/GCeExfcp3xPZl2ZlnWYIeT5O9pH10lV3CH0PZN687w iHxA== X-Forwarded-Encrypted: i=1; AJvYcCXhrXBcsDF2lClFpODSiUQ+ogxfGplcgYRCNjzHw2Bfz8OXYVDVyK+hsh/EHKzkmDzcBt3FoISZv4083leX@vger.kernel.org X-Gm-Message-State: AOJu0Yxy/JNi4NcMO9rylWOipB3VT2Axs7mag8j1dG1Ft5oaQRBiwlB8 YdNkIg3Pjvv4UtsyYufYC6M8NyQGlbWfi9ql1ncUYs6iQ9fw/x643sbR9/VIVBVw08Gp3HeaIQ= = X-Google-Smtp-Source: AGHT+IFKzhN6yxa1m0w1DuTS6hG3IIPd1uDcWGcK6u2GkZ3C9EsPnGf+Bhi+qQWDKgF+BnewqutKH+ggrg== X-Received: from pfbay42.prod.google.com ([2002:a05:6a00:302a:b0:729:9f1:663e]) (user=wnliu job=prod-delivery.src-stubby-dispatcher) by 2002:a05:6a00:2d8e:b0:725:cfa3:bc76 with SMTP id d2e1a72fcca58-72fd0bce05cmr3286318b3a.4.1738135426969; Tue, 28 Jan 2025 23:23:46 -0800 (PST) Date: Wed, 29 Jan 2025 07:23:45 +0000 In-Reply-To: <29b94227-8861-4011-b83f-2e0c59dd1f73@oracle.com> Precedence: bulk X-Mailing-List: live-patching@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <29b94227-8861-4011-b83f-2e0c59dd1f73@oracle.com> X-Mailer: git-send-email 2.48.1.262.g85cc9f2d1e-goog Message-ID: <20250129072345.3106495-1-wnliu@google.com> Subject: Re: [PATCH 0/8] unwind, arm64: add sframe unwinder for kernel From: Weinan Liu To: indu.bhagat@oracle.com Cc: irogers@google.com, joe.lawrence@redhat.com, jpoimboe@kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-toolchains@vger.kernel.org, live-patching@vger.kernel.org, mark.rutland@arm.com, peterz@infradead.org, roman.gushchin@linux.dev, rostedt@goodmis.org, will@kernel.org, wnliu@google.com Content-Type: text/plain; charset="UTF-8" Not only does objdump show that func_start_addr all 0s, but the func_start_addr in the kernel module's sframe table is also incorrect. I'll prepare a repro so we can investigate this. > > I can share a fix for 32589 so atleast we can verify that the starting > point is sane. > Great! Thanks. This will be helpful for comparing the values from the sframe table with the values we obtain at runtime