From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pf1-f201.google.com (mail-pf1-f201.google.com [209.85.210.201]) (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 605BA39EF38 for ; Tue, 19 May 2026 06:50:21 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.210.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779173423; cv=none; b=G+slkJ9r0mKrvZrW99P3nmRPJyeiBR40npy6J2575I2+NY1885pvKpIEmZgZdMp/1Yd3MCs0jqU0EwiQlGN0oENF4kW+DrO8desge/OheDHsMpUPqkR6TAjj4q2SySt8qrLU6JL0iqMdzIphrGjYDB1U9WgcViE5zwwE6ALgAxc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779173423; c=relaxed/simple; bh=jVfugcjgdalF4aRphBnA3RWVR8TUBdRTnGXqTDdA0QQ=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=Rt68mMC49UE9dQ9LFxCHE4IAs1b+7rDJG/y+Q6TzttAyPj6u9sUD24Sct/PVLCRQ1EXbUKAe2evh7m6iagISEaAIvLqBmqnSkzG6Y4MeaF8UNCS7R69c9+Ekk810Wu5MlnLP8TwJa6zc3mxq1TFQIp826JCPP7QR9VISI1f7lQA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--dylanbhatch.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=J7ts8KM6; arc=none smtp.client-ip=209.85.210.201 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--dylanbhatch.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="J7ts8KM6" Received: by mail-pf1-f201.google.com with SMTP id d2e1a72fcca58-8353b042152so4571513b3a.3 for ; Mon, 18 May 2026 23:50:21 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20251104; t=1779173421; x=1779778221; 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=VHkz/NgFKwMRIi/FlTPVEcadP4L/5L+4bREFqEJc294=; b=J7ts8KM6sORU5kBh5i1kiNbNyNFjPkUCrl6dVi2SGxHcETrFnXuo2329Y0qZIzmYFB hPuMAKymVJtjP7bb7nKZu0D2JW9hkWNexrR2XLbPllKye14+hPfYcVQpHJERigHNfMs/ e3dxXKWvQGGW4yu/C9MF3HDOs9AMJdgTRv9G4XjtOti4O+k+yfoFSR0l5JcQKK2N+Shz 4pfsT/MCqjH31dewXX4FSIqcbCx28QenWK9z2qxXJxRpV1y3yDga03DrfbDI2xldwABa /VElTYHNlB2Jq8hrL3ksytl5S1FSHVGN3UKZAMCx/tCfbX2Iyx7A3dGtACEpN7+xQEOZ YXyw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1779173421; x=1779778221; 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=VHkz/NgFKwMRIi/FlTPVEcadP4L/5L+4bREFqEJc294=; b=eIGQKJefcMYOpgZMuf3s/3qCSkVGRFltmjEh1yqNOcRp3s4b7dj/5bI6DaeMhNcmyK Xubdu9LndpmHKQOhC3Fj/YgH172v0aAR4O3CaP5+QXCpRFRw98PPQKOs63Qx0JWg2RPN /8iWgfC+cVokBPklyUTX6bOnI3BsnaRqiXY0DHZaBvGEujklP1denkOtDaiFgxz1HpJy NTjLtO9MtgPEKvxFsSPdwtEs7guTstZ1NnvFLDB8S3HUkW/H28Ff/GC8lrd1XqkQCEqz W+GST+0Xa4YyzTHkYwpEhSFF831DAsCpFjs2w+6bukxBwlmQ/DHHHnsAJ0WZHkn779ao gErw== X-Forwarded-Encrypted: i=1; AFNElJ9vTl7oX+Wa0aSVpWDNbKeSYLS8nLzokQkggyaBCAJlnXBi4H7IZmS5rXL1HVRpAQuOWAFCOxgW9qPmaRUm@vger.kernel.org X-Gm-Message-State: AOJu0YxX5hVqIh/rJMONZdYqig2YHBZbngy5sL6kDz+UsKmfaS0ivtuY iKzShcA+KQ3qc9KB5cZwvfvw5NCXVPzmSzA0hev3N3nPwOwAMTzZp0ytjgscMq55jmJ7Fp4kLlu uzdiT1AjjbMYYTWLau9pZx8KGpg== X-Received: from pfbg11.prod.google.com ([2002:a05:6a00:ae0b:b0:83a:68c:e1c6]) (user=dylanbhatch job=prod-delivery.src-stubby-dispatcher) by 2002:a05:6a00:4214:b0:83d:b11f:796c with SMTP id d2e1a72fcca58-83f33f31c40mr20319191b3a.49.1779173420344; Mon, 18 May 2026 23:50:20 -0700 (PDT) Date: Tue, 19 May 2026 06:49:49 +0000 In-Reply-To: <20260519064950.493949-1-dylanbhatch@google.com> Precedence: bulk X-Mailing-List: live-patching@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20260519064950.493949-1-dylanbhatch@google.com> X-Mailer: git-send-email 2.54.0.563.g4f69b47b94-goog Message-ID: <20260519064950.493949-9-dylanbhatch@google.com> Subject: [PATCH v6 8/9] sframe: Initialize debug info for kernel sections From: Dylan Hatch To: Roman Gushchin , Weinan Liu , Will Deacon , Josh Poimboeuf , Indu Bhagat , Peter Zijlstra , Steven Rostedt , Catalin Marinas , Jiri Kosina , Mark Rutland , Jens Remus Cc: Dylan Hatch , Prasanna Kumar T S M , Puranjay Mohan , Song Liu , joe.lawrence@redhat.com, linux-toolchains@vger.kernel.org, linux-kernel@vger.kernel.org, live-patching@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Randy Dunlap , Mostafa Saleh , Herbert Xu , "David S. Miller" Content-Type: text/plain; charset="UTF-8" Setup the optional unwinder debug information for kernel .sframe sections. Modules are indicated by the format "()". Suggested-by: Jens Remus Signed-off-by: Dylan Hatch --- kernel/unwind/sframe.c | 4 ++++ kernel/unwind/sframe_debug.h | 13 +++++++++++++ 2 files changed, 17 insertions(+) diff --git a/kernel/unwind/sframe.c b/kernel/unwind/sframe.c index e8ede0343cb2..d256e72620fe 100644 --- a/kernel/unwind/sframe.c +++ b/kernel/unwind/sframe.c @@ -1036,6 +1036,8 @@ void __init init_sframe_table(void) kernel_sfsec.text_start = (unsigned long)_stext; kernel_sfsec.text_end = (unsigned long)_etext; + dbg_init(&kernel_sfsec); + if (WARN_ON(sframe_read_header(&kernel_sfsec))) return; if (WARN_ON(sframe_validate_section(&kernel_sfsec))) @@ -1099,6 +1101,8 @@ void sframe_module_init(struct module *mod, void *sframe, size_t sframe_size, sec->text_start = (unsigned long)text; sec->text_end = (unsigned long)text + text_size; + dbg_init(sec); + if (WARN_ON(sframe_read_header(sec))) return; if (WARN_ON(sframe_sort_fdes(sec))) diff --git a/kernel/unwind/sframe_debug.h b/kernel/unwind/sframe_debug.h index e568be4172b1..6c7ab3aa7c9e 100644 --- a/kernel/unwind/sframe_debug.h +++ b/kernel/unwind/sframe_debug.h @@ -32,6 +32,19 @@ static inline void dbg_init(struct sframe_section *sec) struct mm_struct *mm = current->mm; struct vm_area_struct *vma; + if (sec->sec_type == SFRAME_KERNEL) { + if (sec == &kernel_sfsec) { + sec->filename = kstrdup("(vmlinux)", GFP_KERNEL); + } else { + struct module *mod = container_of(sec, struct module, + arch.sframe_sec); + sec->filename = kasprintf(GFP_KERNEL, "(%s)", + mod->name); + } + + return; + } + guard(mmap_read_lock)(mm); vma = vma_lookup(mm, sec->sframe_start); if (!vma) -- 2.54.0.563.g4f69b47b94-goog