From patchwork Sat Aug 24 04:56:32 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ajeet Singh X-Patchwork-Id: 13776318 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 2DC93C52D6F for ; Sat, 24 Aug 2024 04:59:50 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1shiqA-00080x-Gw; Sat, 24 Aug 2024 00:57:30 -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 1shiq9-0007xh-Gr for qemu-devel@nongnu.org; Sat, 24 Aug 2024 00:57:29 -0400 Received: from mail-oo1-xc2a.google.com ([2607:f8b0:4864:20::c2a]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1shiq7-0002Jb-OP for qemu-devel@nongnu.org; Sat, 24 Aug 2024 00:57:29 -0400 Received: by mail-oo1-xc2a.google.com with SMTP id 006d021491bc7-5d5cbe88f70so1877749eaf.0 for ; Fri, 23 Aug 2024 21:57:27 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1724475446; x=1725080246; 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=aPkcLfYPnabFub9OXg5gLpxRTxiDVMKbZ69gdvPy0jqW/EjSc6nKH4swMHfgn3mDJg /qGfzN8Apqw3iAmpcw9bPDBm5VNZ5crMRmuWNJhEi5/LbCcIRLp1tTr6o+GO9PaW5CGg sComs5F8cJJsAnSCbFp0SHqLGbakvp3RwouV4jK5KjpbUvR+cHJjIXiJx2dL/zGscuEV ucIPMcJC5KWBWecGbDTt/CWNnftL7LB6e6kN/lB5+pu80FqPGV843JjPKG4TzfiGMuxB 6CJE4Z0ZhmgxwidzrkJ3b9GsuqbY71uwjW9g5hmb/JoQYuX+ps72wBN80qfqordH38Jn fcTg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1724475446; x=1725080246; 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=pm/2/cGDp/mZC24+kKzOrN6BfFG5vY2tfhXYiDFNXb0JgN7A6o8gDhBAJSOxE9zXW4 cZF2fNpu+mPP75sVqsZXOQN+46i7skARx+TUaYy8xIqw6o6rLRlaiAbLb5YhAPU+NGbU 9hKxfbziaLqUP2SLaMR9yh4wZmwRqUzTWQ3OAedb8GzGnO+Z+ChbzpSttdzH8Q3vmsMk VoCVLFMTgF5DZt6F84aDmBz0qKyFoDFacw2Ux1Eb9S5VIdbU3wz+ASxWSbAo7X/eS9PL FfZyhH4cVJZDQC/7Z02d6ZvktqAfoNzrMW0dMwztna1z9F/4VzPolUUUScRcVGS3gbQC Hm/Q== X-Gm-Message-State: AOJu0YwBzwClZ6aBF+Ha6W8WumuzWvXBQ+q6YUs3W/5Z7gtb0aqfXk5i 4zmK4S6tMLivs+XHZb7ajv0h9alibcTAi2dxIO7HyjBE/BW/Hm77MktuJPMDetU= X-Google-Smtp-Source: AGHT+IGaa4p4vmbOztc3a7HKebHGsiTpajJnIc/4hBwa8mr3Fz99YGiwCjHdJqMPintLLxnGiOJceA== X-Received: by 2002:a05:6358:948b:b0:1aa:b9f2:a0c4 with SMTP id e5c5f4694b2df-1b5c3a4ea37mr492822455d.11.1724475446153; Fri, 23 Aug 2024 21:57:26 -0700 (PDT) Received: from localhost.localdomain ([220.253.126.131]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-7143422ecedsm3805934b3a.25.2024.08.23.21.57.23 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 23 Aug 2024 21:57:25 -0700 (PDT) From: Ajeet Singh X-Google-Original-From: Ajeet Singh To: qemu-devel@nongnu.org Cc: Warner Losh , Mark Corbin , Ajeet Singh , Richard Henderson Subject: [PATCH v3 14/17] bsd-user: Implement RISC-V signal trampoline setup functions Date: Sat, 24 Aug 2024 14:56:32 +1000 Message-Id: <20240824045635.8978-15-itachis@FreeBSD.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240824045635.8978-1-itachis@FreeBSD.org> References: <20240824045635.8978-1-itachis@FreeBSD.org> MIME-Version: 1.0 Received-SPF: pass client-ip=2607:f8b0:4864:20::c2a; envelope-from=itachis6234@gmail.com; helo=mail-oo1-xc2a.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; +}