From patchwork Sun Sep 15 15:25:51 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ajeet Singh X-Patchwork-Id: 13804851 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 CEA5EC3ABA1 for ; Sun, 15 Sep 2024 15:28:59 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1spr9M-0007dp-3v; Sun, 15 Sep 2024 11:26:56 -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 1spr9L-0007bf-Hh for qemu-devel@nongnu.org; Sun, 15 Sep 2024 11:26:55 -0400 Received: from mail-pl1-x62f.google.com ([2607:f8b0:4864:20::62f]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1spr9J-0008Ff-BK for qemu-devel@nongnu.org; Sun, 15 Sep 2024 11:26:55 -0400 Received: by mail-pl1-x62f.google.com with SMTP id d9443c01a7336-2053525bd90so20691335ad.0 for ; Sun, 15 Sep 2024 08:26:53 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1726414011; x=1727018811; 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=K0byiNSSIMXTHAy/Dhh7swYJqNUT5hc7RbiapbwJbQErbB3oUYoRLkKCLkjPLItl8M BOwFFFA5/pfH19R9Ndhy3uJ+yAsigXIhPxC0qsadkqUDfM+nIpIeO2ug22O0x4bXt72Y yrfmh1MLH4/bTQZoGzOBclYqxj7YREFxKZa0NlxlG64x/5EERhDPsYpzyiJ0KnHVvqBa YSTxcJU7V1cR654EgryzpJRdnc5n2YOSDkIQVuSb+qFhFmSrOdBiUFHje2MRMJTFhQaj pwnYIdQdGtS/yihrU/Fg0Rl0njMYlQ8q0ieG8KAU1nervRvw1WXgOy96TmT0mrgdpgs8 EMpw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1726414011; x=1727018811; 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=qTpnNQni14efuRWLfEFlVGFUm4PpiJ6pINnwad+IkU7sVxtDpf8raq61yeuNR9AKwl CT9crlpZhD1geTdHAUVAy3ONn+/SSx5J+fpXVmuDJflblyUvMv88toXNlGclS7cUfIHR jkBTwXTO4Xo3aKKDS5HzCo2bN5vROJNxSTrtLl4CIqS+LTJzJfe7g9ntoCg98GrSCHce 7TQsh1D4tpCNMVNZ0rMstWpT9b/B4QxA6URSsuGntcn9McwGwnVYj3wIwnrcD8x5RsLe qOiRUQhznIv0V+N5ktOUlvLnmfSaD46TeSEV4R23ykTNdE/sFTUjsCUP77x4co0rbsmM ccGg== X-Gm-Message-State: AOJu0Yx/b2fZkBob6S3C2sw02Wj8uVIOrsNAOkAN/aoEN014AGLNm519 TqqC9ojE6fA+5lnbTLgBatbvsHh2ZezBGdv6JH0cO4fBBTjpz2w+p4Ig5Q== X-Google-Smtp-Source: AGHT+IHajRv6ps20JaJ5GAH87n0s7KU/cz+Doxlsa5GI4ILV5fINSOx7qA3HAyZQwmBpfl1t1UePlQ== X-Received: by 2002:a17:902:d508:b0:205:6a4c:9a20 with SMTP id d9443c01a7336-2078253009bmr124516825ad.34.1726414011247; Sun, 15 Sep 2024 08:26:51 -0700 (PDT) Received: from localhost.localdomain (14-200-149-22.tpgi.com.au. [14.200.149.22]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-207946f34c1sm22554335ad.184.2024.09.15.08.26.48 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 15 Sep 2024 08:26:50 -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 v6 14/17] bsd-user: Implement RISC-V signal trampoline setup functions Date: Mon, 16 Sep 2024 01:25:51 +1000 Message-Id: <20240915152554.8394-15-itachis@FreeBSD.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240915152554.8394-1-itachis@FreeBSD.org> References: <20240915152554.8394-1-itachis@FreeBSD.org> MIME-Version: 1.0 Received-SPF: pass client-ip=2607:f8b0:4864:20::62f; envelope-from=itachis6234@gmail.com; helo=mail-pl1-x62f.google.com X-Spam_score_int: -17 X-Spam_score: -1.8 X-Spam_bar: - X-Spam_report: (-1.8 / 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 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; +}