From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id C0535CD4F3C for ; Tue, 19 May 2026 06:50:39 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Type:Cc:To:From: Subject:Message-ID:References:Mime-Version:In-Reply-To:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=VHkz/NgFKwMRIi/FlTPVEcadP4L/5L+4bREFqEJc294=; b=c+nUwH5tD/Bguu94DrHo8H7z13 KhA14PJHTim/rcPRacPWY/glJlD8tGAIOwtIz1Yvq7tIVupoXFR1OqGsestrGvNdITPRdzXHAxjA+ oPBSvwo48q5Dntcwv1mTQWpTq03gBb+iTWhG1HAlhA74flu0aW4+gQ8wAFgPlFVg2jG1eHgib854r oE+DPBHzlXIQZXE+fVgD3WM8yEQi0z5SE+Xj3SyWmpq7PSASCKPvV9uSWgvhS3v2R12EIZLGYngxh 7fKa8E1xWY5c5aLlMaHvx2uPLnZZtTgxUsijHqOEhRrQRW7miMCNySlTJF5mpg6lJ8cLUIaxla1tt 3W9N02cg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1wPEHd-00000000Oh5-1G3A; Tue, 19 May 2026 06:50:29 +0000 Received: from mail-pf1-x449.google.com ([2607:f8b0:4864:20::449]) by bombadil.infradead.org with esmtps (Exim 4.99.1 #2 (Red Hat Linux)) id 1wPEHV-00000000OZv-4BZ2 for linux-arm-kernel@lists.infradead.org; Tue, 19 May 2026 06:50:23 +0000 Received: by mail-pf1-x449.google.com with SMTP id d2e1a72fcca58-83536dc3be5so3155529b3a.1 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=lists.infradead.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=IxP3TpP5c2NI5n8HgYuGlu/RgIEee4uBG64/u5kOvlh5doQCMFEr6JhZfZHDSmZMcV skvkF6BUQOzknD3FjffTFU1eqYrjUA+Wpwt0Nzy/QXKAirRX6CxXi+ANn6VT73DHyaQr 40jKDSZZZ3uidcuycbw3ypTtvQmebhDeFr5BCeTfYvs0W/ibseT5NTjo/XBhHFoPpgre ROP7ZmsBfYSsMMbJjG/xjUwpa4FhdNNNY0zMWDGgI9w8M40Ep20F94M6Hd1+FydpYP43 OS3QUcub7W1wysXDIlVjOkn+6weXGUYbD2IyoptGr1Uw4kZ+Qa/DvVnb55RC5tt2NO2I EGvg== 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=AIAOkdCODmZDUYuhxu1iR0oP74mkYxBE2w5mTO/dzoorLhzbKvGx/9Y1KNFKnatiiv dFrfjsDkYRyOfAlVWDkhmbKuKkjDrXHGlLL5GgeGilsy5WqSbOf3YcqyFWQuCszvSAU9 UgIymaCjw7ZKEMCNf9tE2KIm6wfqjkFMHwa3/LEfAYs6PKfHpeiVqlXJ+xvR5zHUDRcW Wx1O52ftSzJzrLPtWQDU6mocB4eniactatGq9ZWOqkPkhZxVCsWjptKbjI8wG6WQed+H r32jjeS7svg0Ct5bVjHHvNmLbVYmUxzDh/ArPK/aC0NRgS9xiYULnXYBdKW9cW4EODAK l1ow== X-Forwarded-Encrypted: i=1; AFNElJ/hE2RjniNVLVqyGLktlTLmkfTmAYPnC5ccB0+duEng4RqHzwE6ctqcHxC1E8Ln7Cakgw++RH4qxnohLz2mXmw0@lists.infradead.org X-Gm-Message-State: AOJu0Yyi7IrwMN02jjMOz3aXeMjA8nyKWQJFOPuanZG3VOtufCOpGkYF JP1BbaJ7bbICYwiUaCb5RwrRmEXjBpHuDmbJfp8OUmaWxgnbHxixAO6eQP+7pSeKmCgesTkAV7e XMaeBfzz31jyqNyFXjIs3LhPuow== 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> 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" X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260518_235022_051308_0CF89BF1 X-CRM114-Status: GOOD ( 13.36 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org 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