From: Deepak Gupta <debug@rivosinc.com>
To: "Thomas Gleixner" <tglx@linutronix.de>,
"Ingo Molnar" <mingo@redhat.com>,
"Borislav Petkov" <bp@alien8.de>,
"Dave Hansen" <dave.hansen@linux.intel.com>,
x86@kernel.org, "H. Peter Anvin" <hpa@zytor.com>,
"Andrew Morton" <akpm@linux-foundation.org>,
"Liam R. Howlett" <Liam.Howlett@oracle.com>,
"Vlastimil Babka" <vbabka@suse.cz>,
"Lorenzo Stoakes" <lorenzo.stoakes@oracle.com>,
"Paul Walmsley" <paul.walmsley@sifive.com>,
"Palmer Dabbelt" <palmer@dabbelt.com>,
"Albert Ou" <aou@eecs.berkeley.edu>,
"Conor Dooley" <conor@kernel.org>,
"Rob Herring" <robh@kernel.org>,
"Krzysztof Kozlowski" <krzk+dt@kernel.org>,
"Arnd Bergmann" <arnd@arndb.de>,
"Christian Brauner" <brauner@kernel.org>,
"Peter Zijlstra" <peterz@infradead.org>,
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"Kees Cook" <kees@kernel.org>, "Jonathan Corbet" <corbet@lwn.net>,
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"Conor Dooley" <conor+dt@kernel.org>,
"Miguel Ojeda" <ojeda@kernel.org>,
"Alex Gaynor" <alex.gaynor@gmail.com>,
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"Alice Ryhl" <aliceryhl@google.com>,
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"Benno Lossin" <lossin@kernel.org>
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,
Deepak Gupta <debug@rivosinc.com>
Subject: [PATCH v18 18/27] riscv/kernel: update __show_regs to print shadow stack register
Date: Fri, 11 Jul 2025 12:46:23 -0700 [thread overview]
Message-ID: <20250711-v5_user_cfi_series-v18-18-a8ee62f9f38e@rivosinc.com> (raw)
In-Reply-To: <20250711-v5_user_cfi_series-v18-0-a8ee62f9f38e@rivosinc.com>
Updating __show_regs to print captured shadow stack pointer as well.
On tasks where shadow stack is disabled, it'll simply print 0.
Signed-off-by: Deepak Gupta <debug@rivosinc.com>
Reviewed-by: Alexandre Ghiti <alexghiti@rivosinc.com>
---
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 91db51413fab..a88b06ad2f9a 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));
pr_cont("status: " REG_FMT " badaddr: " REG_FMT " cause: " REG_FMT "\n",
regs->status, regs->badaddr, regs->cause);
--
2.43.0
next prev parent reply other threads:[~2025-07-11 19:47 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-07-11 19:46 [PATCH v18 00/27] riscv control-flow integrity for usermode Deepak Gupta
2025-07-11 19:46 ` [PATCH v18 01/27] mm: VM_SHADOW_STACK definition for riscv Deepak Gupta
2025-07-11 19:46 ` [PATCH v18 02/27] dt-bindings: riscv: zicfilp and zicfiss in dt-bindings (extensions.yaml) Deepak Gupta
2025-07-11 19:46 ` [PATCH v18 03/27] riscv: zicfiss / zicfilp enumeration Deepak Gupta
2025-07-11 19:46 ` [PATCH v18 04/27] riscv: zicfiss / zicfilp extension csr and bit definitions Deepak Gupta
2025-07-11 19:46 ` [PATCH v18 05/27] riscv: usercfi state for task and save/restore of CSR_SSP on trap entry/exit Deepak Gupta
2025-07-11 19:46 ` [PATCH v18 06/27] riscv/mm : ensure PROT_WRITE leads to VM_READ | VM_WRITE Deepak Gupta
2025-07-11 19:46 ` [PATCH v18 07/27] riscv/mm: manufacture shadow stack pte Deepak Gupta
2025-07-11 19:46 ` [PATCH v18 08/27] riscv/mm: teach pte_mkwrite to manufacture shadow stack PTEs Deepak Gupta
2025-07-11 19:46 ` [PATCH v18 09/27] riscv/mm: write protect and shadow stack Deepak Gupta
2025-07-11 19:46 ` [PATCH v18 10/27] riscv/mm: Implement map_shadow_stack() syscall Deepak Gupta
2025-07-11 19:46 ` [PATCH v18 11/27] riscv/shstk: If needed allocate a new shadow stack on clone Deepak Gupta
2025-07-11 19:46 ` [PATCH v18 12/27] riscv: Implements arch agnostic shadow stack prctls Deepak Gupta
2025-07-11 19:46 ` [PATCH v18 13/27] prctl: arch-agnostic prctl for indirect branch tracking Deepak Gupta
2025-07-11 19:46 ` [PATCH v18 14/27] riscv: Implements arch agnostic indirect branch tracking prctls Deepak Gupta
2025-07-11 19:46 ` [PATCH v18 15/27] riscv/traps: Introduce software check exception and uprobe handling Deepak Gupta
2025-07-11 19:46 ` [PATCH v18 16/27] riscv: signal: abstract header saving for setup_sigcontext Deepak Gupta
2025-07-11 19:46 ` [PATCH v18 17/27] riscv/signal: save and restore of shadow stack for signal Deepak Gupta
2025-07-11 19:46 ` Deepak Gupta [this message]
2025-07-11 19:46 ` [PATCH v18 19/27] riscv/ptrace: riscv cfi status and state via ptrace and in core files Deepak Gupta
2025-07-11 19:46 ` [PATCH v18 20/27] riscv/hwprobe: zicfilp / zicfiss enumeration in hwprobe Deepak Gupta
2025-07-11 19:46 ` [PATCH v18 21/27] riscv: kernel command line option to opt out of user cfi Deepak Gupta
2025-07-11 19:46 ` [PATCH v18 22/27] riscv: enable kernel access to shadow stack memory via FWFT sbi call Deepak Gupta
2025-07-11 19:46 ` [PATCH v18 23/27] arch/riscv: compile vdso with landing pad and shadow stack note Deepak Gupta
2025-07-11 19:46 ` [PATCH v18 24/27] riscv: create a config for shadow stack and landing pad instr support Deepak Gupta
2025-07-11 19:46 ` [PATCH v18 25/27] riscv: Documentation for landing pad / indirect branch tracking Deepak Gupta
2025-07-11 19:46 ` [PATCH v18 26/27] riscv: Documentation for shadow stack on riscv Deepak Gupta
2025-07-11 19:46 ` [PATCH v18 27/27] kselftest/riscv: kselftest for user mode cfi Deepak Gupta
2025-07-11 20:25 ` [PATCH v18 00/27] riscv control-flow integrity for usermode Deepak Gupta
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