From patchwork Tue Sep 17 13:08:51 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ben Dooks X-Patchwork-Id: 13806168 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 91FC7C35FFF for ; Tue, 17 Sep 2024 13:33:13 +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=+hUbPYoNCvzSbLtb9XM/tX3BhhJseN/C4la6EBJndIE=; b=2/cSN/yD2vmdT7 qripjSBfb0WA2alrt/YrrvYHotKPoR87TAIImprjRwq5850me/H7/tOznMu+CweldQ3M00SM8umqJ TSCTpGz7QLfAqsdXJ4KVbCu9JS4/SaSoXBGgw4zxMEWux/gnaOW08zMZ4cC1+5uQToNtd88oviyVh r3sZqFwmXxZkZdYZ4HE1fcLMCQWvZ/1ESCv+hrTfEIzvLA7jxyp9J30CI6fIzgRqUfWUUyHVa3Fy3 aWcn32DaR2a9c0tCYEYPfehXif7jOqpftyq/EtUGimo1ULj5IDLbbeeLYZUB1ZfmCJhhd9BCP7O0Y +Et2yPWzvTy4GE+UrgxQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98 #2 (Red Hat Linux)) id 1sqYKM-00000006El4-1MCB; Tue, 17 Sep 2024 13:33:10 +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 1sqYKJ-00000006EkU-0MWa for linux-riscv@lists.infradead.org; Tue, 17 Sep 2024 13:33:08 +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=BAuGBA6SeGp8hx6Y+sRmy9j/6zVyRjrmgZdRmAJIH6o=; b=OJb8gcLPH5kl/h9Oqnuu6YCEvh h7AEo/dT1E+oKZgS2G+9OXJwxtT9aBoYPHoHG9SPi8bGer6gk22wnU50+TBzCGg0P7GHVwlrlGxpP yqfl04uryUJqGSaOrTUMk6HgGFLytoM5HRJlvOi0hxQhz3STyE/Et1CasYN9X5BPR3w4YGLtlXmKO ZzrlyXmYUF62qZcDGXBKpamEjOwkCbCdcFkFDcZECE7GCrR+gMGtvWtlfI0vd2CZ6d7YErz9QMTye +xoAVatjS7ZVSrgVHF822es4aU141/wGUbOr7FMt4jW8LDzsSx9u04F2qrjuokKrbdZEgB+1ihGT8 z+hc/jMg==; Received: from [83.68.141.146] (helo=rainbowdash) by imap5.colo.codethink.co.uk with esmtpsa (Exim 4.94.2 #2 (Debian)) id 1sqXws-00FSG2-NZ; Tue, 17 Sep 2024 14:08:54 +0100 Received: from ben by rainbowdash with local (Exim 4.98) (envelope-from ) id 1sqXws-000000004rP-0VIV; Tue, 17 Sep 2024 14:08:54 +0100 From: Ben Dooks To: linux-riscv@lists.infradead.org Cc: Ben Dooks Subject: [PATCH 1/3] riscv: ptrace: add regs_set_register() Date: Tue, 17 Sep 2024 14:08:51 +0100 Message-Id: <20240917130853.18657-2-ben.dooks@codethink.co.uk> X-Mailer: git-send-email 2.37.2.352.g3c44437643 In-Reply-To: <20240917130853.18657-1-ben.dooks@codethink.co.uk> References: <20240917130853.18657-1-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-20240917_063307_230200_ACFEA780 X-CRM114-Status: GOOD ( 12.05 ) 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: , 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 --- 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..66fc1795141d 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 from its offset + * @regs: pt_regs from which register value is gotten + * @offset: offset of the register. + * @to: 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 to) +{ + if (unlikely(offset > MAX_REG_OFFSET)) + return; + + *(unsigned long *)((unsigned long)regs + offset) = to; +} + /** * regs_get_kernel_argument() - get Nth function argument in kernel * @regs: pt_regs of that context