From patchwork Wed Aug 28 09:52:40 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ajeet Singh X-Patchwork-Id: 13781019 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 lists.gnu.org (lists.gnu.org [209.51.188.17]) (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 08877C5479A for ; Wed, 28 Aug 2024 09:54:52 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1sjFMu-0003eq-03; Wed, 28 Aug 2024 05:53:36 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1sjFMs-0003Zd-Nc for qemu-devel@nongnu.org; Wed, 28 Aug 2024 05:53:34 -0400 Received: from mail-oa1-x2f.google.com ([2001:4860:4864:20::2f]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1sjFMq-0001qU-TY for qemu-devel@nongnu.org; Wed, 28 Aug 2024 05:53:34 -0400 Received: by mail-oa1-x2f.google.com with SMTP id 586e51a60fabf-2704b6a6fe6so4568623fac.1 for ; Wed, 28 Aug 2024 02:53:32 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1724838811; x=1725443611; darn=nongnu.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=7+bsO6A/4UIjh+UAI8JcbcWlILl99UyeWUeQ1BHs21E=; b=bJps8pEpdV0oHR75mMx3QvDdgs4XT4QbhqANuRR6QlTmhMZD7/QbalcngVKmZflo2c hPXHyMEbR7hvAeRZ0cghboKSyR13BHkBJF626qCx2FiBIio+TudAgqY1XqPMHM9rSZXG n52AI8oH3LzW8gKzgsnie2Mo19MGpOAp8i/0VazcpTc4SAzmBtfKMDA4rXLAr4xqdQF8 TLIXiNrBABDxekKC+NHJCncnpwUdFzWKEOZZNk+rj8vCMfNBNs1myvwHd6LNaLeuW5/U MOCagjJ84ScVUBzHxkoK5sT/xqIcwHNQ8NIBeeN/9sIC1SfyGInGnHfRcbGPSWbSFyeO zCIg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1724838811; x=1725443611; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=7+bsO6A/4UIjh+UAI8JcbcWlILl99UyeWUeQ1BHs21E=; b=dXzS0X3FKw34b4MYTDIa2eMoKnjp1lU/HJwxJyGA2wv5V9y0OoZvYZA92LpItTgL5c T1PpekLkyTxlLu/8NUi0jpwTBHiwx72aoIvRXxUgIDj0kGTJ3DBOa1y+Cd8wCRXtdoy6 pe8lEyXNQvr+Z63qzMGKFUCZmZJLBtJzjmcAFXcEb3A/mr1llZhHzYbn5RCRNJP4zT9q ++eW7VSJe3QouL6D0qYtp1hz2h6V5zj/uVmdfCcjfryOnih0SrXXOOlGKf6Yh64aBIbg yxTsg/jH3wuMvY0AfQIDhys+ozCXY3miKo+Eggsnou8buXpBICKRTpQzkXlCrDl0ee54 NHdQ== X-Gm-Message-State: AOJu0YwgREKLoahs05wz2elLM7lUqB8ZVsL8XRqA9OKToRPVXq9VJbd6 tMN5zC+R+sGObkSi+lNaaUVlnHMDnRDqowjm4UfG9m4CRvJpgev3a1zgjQ== X-Google-Smtp-Source: AGHT+IHqNlVZOqCxRnzo2RVFi3hVTav9vLjMGt3c7MZMTZbe6YXfscGuk8pabzxcHsgM7q5dCZTYAQ== X-Received: by 2002:a05:6870:858a:b0:261:908:5899 with SMTP id 586e51a60fabf-2777d14bc55mr1353411fac.10.1724838811211; Wed, 28 Aug 2024 02:53:31 -0700 (PDT) Received: from localhost.localdomain ([220.253.126.131]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-7143430f6e7sm9787508b3a.160.2024.08.28.02.53.29 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 28 Aug 2024 02:53:30 -0700 (PDT) From: Ajeet Singh X-Google-Original-From: Ajeet Singh To: qemu-devel@nongnu.org Cc: Mark Corbin , Warner Losh , Ajeet Singh , Richard Henderson Subject: [PATCH v4 14/17] bsd-user: Implement RISC-V signal trampoline setup functions Date: Wed, 28 Aug 2024 19:52:40 +1000 Message-Id: <20240828095243.90491-15-itachis@FreeBSD.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240828095243.90491-1-itachis@FreeBSD.org> References: <20240828095243.90491-1-itachis@FreeBSD.org> MIME-Version: 1.0 Received-SPF: pass client-ip=2001:4860:4864:20::2f; envelope-from=itachis6234@gmail.com; helo=mail-oa1-x2f.google.com X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_ENVFROM_END_DIGIT=0.25, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org From: Mark Corbin Added functions for setting up the RISC-V signal trampoline and signal frame: 'set_sigtramp_args()': Configures the RISC-V CPU state with arguments for the signal handler. It sets up the registers with the signal number,pointers to the signal info and user context, the signal handler address, and the signal frame pointer. 'setup_sigframe_arch()': Initializes the signal frame with the current machine context.This function copies the context from the CPU state to the signal frame, preparing it for the signal handler. Signed-off-by: Mark Corbin Signed-off-by: Ajeet Singh Signed-off-by: Warner Losh Co-authored-by: Warner Losh Reviewed-by: Richard Henderson --- bsd-user/riscv/signal.c | 63 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 63 insertions(+) create mode 100644 bsd-user/riscv/signal.c diff --git a/bsd-user/riscv/signal.c b/bsd-user/riscv/signal.c new file mode 100644 index 0000000000..2597fec2fd --- /dev/null +++ b/bsd-user/riscv/signal.c @@ -0,0 +1,63 @@ +/* + * RISC-V signal definitions + * + * Copyright (c) 2019 Mark Corbin + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, see . + */ +#include "qemu/osdep.h" + +#include "qemu.h" + +/* + * Compare with sendsig() in riscv/riscv/exec_machdep.c + * Assumes that target stack frame memory is locked. + */ +abi_long +set_sigtramp_args(CPURISCVState *regs, int sig, struct target_sigframe *frame, + abi_ulong frame_addr, struct target_sigaction *ka) +{ + /* + * Arguments to signal handler: + * a0 (10) = signal number + * a1 (11) = siginfo pointer + * a2 (12) = ucontext pointer + * pc = signal pointer handler + * sp (2) = sigframe pointer + * ra (1) = sigtramp at base of user stack + */ + + regs->gpr[xA0] = sig; + regs->gpr[xA1] = frame_addr + + offsetof(struct target_sigframe, sf_si); + regs->gpr[xA2] = frame_addr + + offsetof(struct target_sigframe, sf_uc); + regs->pc = ka->_sa_handler; + regs->gpr[xSP] = frame_addr; + regs->gpr[xRA] = TARGET_PS_STRINGS - TARGET_SZSIGCODE; + return 0; +} + +/* + * Compare to riscv/riscv/exec_machdep.c sendsig() + * Assumes that the memory is locked if frame points to user memory. + */ +abi_long setup_sigframe_arch(CPURISCVState *env, abi_ulong frame_addr, + struct target_sigframe *frame, int flags) +{ + target_mcontext_t *mcp = &frame->sf_uc.uc_mcontext; + + get_mcontext(env, mcp, flags); + return 0; +}