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 EF522D49762 for ; Sun, 1 Dec 2024 10:28:31 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=DkY50LEf2t0aek9wRQu1zD4dSfCGwaREF61y9RVENeA=; b=HVwbYGkKQXgVGE K3NNDFGZymMbDX63K4TXeKeUuQW2HAiDPV7JnKoWQgKcKe9Ir9ZpKA3ewYFKPkjM5XZt72cHVH2vO iUiOPNBG+yc4orijS5FhGKO6c/j0gpm+iRZGW9bK9R4/xDqNRPpPQWj9MHmWB6vhRl09d8GX020Rc 4EXZ+OiQpU2BLS/FXVj31Q7KtJvYoxrWmK1/xiCxxvv6cpwnYNM0cP7wCdQqn3yy1EIiWbEAMBxkm TGWaqOCPbOe9Gd/zojqjfuJYJNTajLICyjZ5UMSdeRLbaXFfP9V59KxdU8gYFoidxN2/lAlxvJ6MN bzk8xGY/GLE9N/mKfkxA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98 #2 (Red Hat Linux)) id 1tHhBU-00000003INp-0KHI; Sun, 01 Dec 2024 10:28:12 +0000 Received: from imap5.colo.codethink.co.uk ([78.40.148.171]) by bombadil.infradead.org with esmtps (Exim 4.98 #2 (Red Hat Linux)) id 1tHhBQ-00000003IMR-3odt for linux-riscv@lists.infradead.org; Sun, 01 Dec 2024 10:28:10 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=codethink.co.uk; s=imap5-20230908; h=Sender:Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From: Reply-To:Content-Type:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id:List-Help: List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=yw5hif6R2xr8gQiHoZQCNSDbVLkDYEqGBRYYvkoSF24=; b=LHB8KC2ceCUaLl8HnzUR3b1Grj BZ9cWpI4lgSkVPfTu18s994++ksTwOa4xCTC7FEflRLHfXY6/8M0HdctVQ1KXraGVqNFKjzgN4MgL ozDUpvZL298+ycf4KdQ0sV2Ar787ecGTuGCNmFT7FVar0yX1C2KvGhPyPhtRel9iz5q0twlbl8O/m axOGyaJSZ8e/mjcHPXWE78oX5w3Y4Eh2VyAedO33W4eMhQvm7oEiPVXztwbi2Djs2fhZtfMOhNBxp 5djzNopQvxW5GyrM0TIURiR+3gbqgiBGADvH3Jb9RHO1pqTQwkCSApD2A7dja93lRqbNcKwYVrP7S uFNt3PlQ==; Received: from [167.98.27.226] (helo=rainbowdash) by imap5.colo.codethink.co.uk with esmtpsa (Exim 4.94.2 #2 (Debian)) id 1tHhBI-00FjrP-RS; Sun, 01 Dec 2024 10:28:02 +0000 Received: from ben by rainbowdash with local (Exim 4.98) (envelope-from ) id 1tHhBJ-00000000vYn-2pUh; Sun, 01 Dec 2024 10:28:01 +0000 From: Ben Dooks To: linux-riscv@lists.infradead.org Cc: ajones@ventanamicro.com, palmer@dabbelt.com, Ben Dooks Subject: [PATCH v2 1/3] riscv: ptrace: add regs_set_register() Date: Sun, 1 Dec 2024 10:27:57 +0000 Message-Id: <20241201102759.221176-2-ben.dooks@codethink.co.uk> X-Mailer: git-send-email 2.37.2.352.g3c44437643 In-Reply-To: <20241201102759.221176-1-ben.dooks@codethink.co.uk> References: <20241201102759.221176-1-ben.dooks@codethink.co.uk> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20241201_022809_121774_184CB21D X-CRM114-Status: GOOD ( 11.37 ) X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org Since we have regs_get_register() and we could use the set counterpart for things like fixing up traps, add regs_set_register() to set a pt_regs value from offset. Signed-off-by: Ben Dooks --- v2: - fixed Andrew Jones' suggestions for comments --- arch/riscv/include/asm/ptrace.h | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) diff --git a/arch/riscv/include/asm/ptrace.h b/arch/riscv/include/asm/ptrace.h index b5b0adcc85c1..45c503b592c8 100644 --- a/arch/riscv/include/asm/ptrace.h +++ b/arch/riscv/include/asm/ptrace.h @@ -143,6 +143,26 @@ static inline unsigned long regs_get_register(struct pt_regs *regs, return *(unsigned long *)((unsigned long)regs + offset); } +/** + * regs_set_register() - set register value at its offset + * @regs: pt_regs to which register value is set + * @offset: offset of the register. + * @value: value to set register to + * + * regs_set_register sets the value @to to a register whose offset from @regs. + * The @offset is the offset of the register in struct pt_regs. + * If @offset is bigger than MAX_REG_OFFSET, this will ignore the write. + */ +static inline void regs_set_register(struct pt_regs *regs, + unsigned int offset, + unsigned long value) +{ + if (unlikely(offset > MAX_REG_OFFSET)) + return; + + *(unsigned long *)((unsigned long)regs + offset) = value; +} + /** * regs_get_kernel_argument() - get Nth function argument in kernel * @regs: pt_regs of that context -- 2.37.2.352.g3c44437643 _______________________________________________ linux-riscv mailing list linux-riscv@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-riscv