From nobody Tue Feb 10 17:14:35 2026 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id DAF5D35C1A0; Fri, 5 Dec 2025 18:41:51 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1764960112; cv=none; b=RjZo1t7sjpiqtCjZZsd5V0gOQ1R8BFF1MFIuq8AF8KKPUTTjU4oThZVWodL5POtfyK8jiluLRZ3dVnvzEA8G7WSuQM9dzfXz8UyCMPaMY3QriJ3RsVXNirBBLsuEzuz4rzPtE37hvkqY0ryuHaOIsznZ9QVFi3IsQkyxU2xScKs= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1764960112; c=relaxed/simple; bh=gKj05EfXWRzFgsdHcGDwkowJM1p6i+3gIjza9qiTqkA=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=Nt39YgTyOFTlumna/rrYXtns9wvnSZ80RGb0rFdPltzySUVEmjxhckAJt0VO7GBcS35cIZSFtHpdaVbC++0vYjrr+XGLOcH/enwcW2CQ78DHF+QxwNxhHQa99QYziLVIi+L72P6QctDH5QRkdHTSr+/qg/d9k1ZyRRUI0XQeEtE= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=lrA9+hoT; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="lrA9+hoT" Received: by smtp.kernel.org (Postfix) with ESMTPS id AC753C4DDFD; Fri, 5 Dec 2025 18:41:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1764960111; bh=gKj05EfXWRzFgsdHcGDwkowJM1p6i+3gIjza9qiTqkA=; h=From:Date:Subject:References:In-Reply-To:To:Cc:Reply-To:From; b=lrA9+hoTr2rXtUg3iXXS/9M9Jv5840hMcRepNTJgpUxDVzm1+raQrK77SQYuDEzNH GJogM9EuVytNk5wmPOa/jAOUZvXObYgzuRR4ZknaF+v2zDM45YdRIA+9IM3w6NByFr Ch7G8laVMENMImxp1btsjJ23j8pE/K7y5IN5Rf/OWZ0FqShFmhFzCqLaPhpOMV5rww jhvPSjSve+BHc/1fIf4NV8uOtncVBiUbPjDK5dNVatIEya3QtDkt9Uxmt88FW3lbiq NQgVJIfTc+fBUufFb15XI+/sVpjqsPEV4YHvVT/3VPhXN0hrVtX0RIUFI2QH8rMJuO LQYIUPy+K56Bg== Received: from aws-us-west-2-korg-lkml-1.web.codeaurora.org (localhost.localdomain [127.0.0.1]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9C0B8D2F7F6; Fri, 5 Dec 2025 18:41:51 +0000 (UTC) From: Deepak Gupta via B4 Relay Date: Fri, 05 Dec 2025 10:41:56 -0800 Subject: [PATCH v25 18/28] riscv/kernel: update __show_regs to print shadow stack register Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20251205-v5_user_cfi_series-v25-18-1a07c0127361@rivosinc.com> References: <20251205-v5_user_cfi_series-v25-0-1a07c0127361@rivosinc.com> In-Reply-To: <20251205-v5_user_cfi_series-v25-0-1a07c0127361@rivosinc.com> To: Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , x86@kernel.org, "H. Peter Anvin" , Andrew Morton , "Liam R. Howlett" , Vlastimil Babka , Lorenzo Stoakes , Paul Walmsley , Palmer Dabbelt , Albert Ou , Conor Dooley , Rob Herring , Krzysztof Kozlowski , Arnd Bergmann , Christian Brauner , Peter Zijlstra , Oleg Nesterov , Eric Biederman , Kees Cook , Jonathan Corbet , Shuah Khan , Jann Horn , Conor Dooley , Miguel Ojeda , Alex Gaynor , Boqun Feng , Gary Guo , =?utf-8?q?Bj=C3=B6rn_Roy_Baron?= , Andreas Hindborg , Alice Ryhl , Trevor Gross , Benno Lossin Cc: linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linux-riscv@lists.infradead.org, devicetree@vger.kernel.org, linux-arch@vger.kernel.org, linux-doc@vger.kernel.org, linux-kselftest@vger.kernel.org, alistair.francis@wdc.com, richard.henderson@linaro.org, jim.shu@sifive.com, andybnac@gmail.com, kito.cheng@sifive.com, charlie@rivosinc.com, atishp@rivosinc.com, evan@rivosinc.com, cleger@rivosinc.com, alexghiti@rivosinc.com, samitolvanen@google.com, broonie@kernel.org, rick.p.edgecombe@intel.com, rust-for-linux@vger.kernel.org, Andreas Korb , Valentin Haudiquet , Deepak Gupta X-Mailer: b4 0.13.0 X-Developer-Signature: v=1; a=ed25519-sha256; t=1764960107; l=1182; i=debug@rivosinc.com; s=20251023; h=from:subject:message-id; bh=XI4ppsK62Fegg41RmjuRUH5R6YykPAMiGtdfLotNIGk=; b=l6Q7qF73uJomHw0ehkP1t2QZ7pGlMrNsJbPbw5cJvi95Vi+ilYXg5KGXrCDdAnxDZhga/lxhp xahKwdn8tu7DmrT3yXGJiEa3qCcNZ52OENO38Q/98iauV2pY4SXd480 X-Developer-Key: i=debug@rivosinc.com; a=ed25519; pk=O37GQv1thBhZToXyQKdecPDhtWVbEDRQ0RIndijvpjk= X-Endpoint-Received: by B4 Relay for debug@rivosinc.com/20251023 with auth_id=553 X-Original-From: Deepak Gupta Reply-To: debug@rivosinc.com From: Deepak Gupta Updating __show_regs to print captured shadow stack pointer as well. On tasks where shadow stack is disabled, it'll simply print 0. Reviewed-by: Alexandre Ghiti Tested-by: Andreas Korb Tested-by: Valentin Haudiquet Signed-off-by: Deepak Gupta --- arch/riscv/kernel/process.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/riscv/kernel/process.c b/arch/riscv/kernel/process.c index 49f527e3acfd..aacb23978f93 100644 --- a/arch/riscv/kernel/process.c +++ b/arch/riscv/kernel/process.c @@ -93,8 +93,8 @@ void __show_regs(struct pt_regs *regs) regs->s8, regs->s9, regs->s10); pr_cont(" s11: " REG_FMT " t3 : " REG_FMT " t4 : " REG_FMT "\n", regs->s11, regs->t3, regs->t4); - pr_cont(" t5 : " REG_FMT " t6 : " REG_FMT "\n", - regs->t5, regs->t6); + pr_cont(" t5 : " REG_FMT " t6 : " REG_FMT " ssp : " REG_FMT "\n", + regs->t5, regs->t6, get_active_shstk(current)); =20 pr_cont("status: " REG_FMT " badaddr: " REG_FMT " cause: " REG_FMT "\n", regs->status, regs->badaddr, regs->cause); --=20 2.43.0