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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9CC8AC433F5 for ; Fri, 5 Nov 2021 03:43:51 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id 253AE61245 for ; Fri, 5 Nov 2021 03:43:51 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 253AE61245 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=bsdimp.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=nongnu.org Received: from localhost ([::1]:50624 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1miq8s-0008Bx-6C for qemu-devel@archiver.kernel.org; Thu, 04 Nov 2021 23:43:50 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:53956) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mipm4-0004ak-0G for qemu-devel@nongnu.org; Thu, 04 Nov 2021 23:20:16 -0400 Received: from mail-io1-xd32.google.com ([2607:f8b0:4864:20::d32]:43779) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1mipm0-0004Bt-9T for qemu-devel@nongnu.org; Thu, 04 Nov 2021 23:20:15 -0400 Received: by mail-io1-xd32.google.com with SMTP id b203so5835785iof.10 for ; Thu, 04 Nov 2021 20:20:11 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bsdimp-com.20210112.gappssmtp.com; s=20210112; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=4oZ5iwXqrJmDcU+2qXHAQ++/SNnYAx62sujgKs8Ho4M=; b=uocYHOL+N/Zc+TzaAsIC0fuw++G00gnW8Jej5GciuPQE3PGm9ZAxaafpaQDaYNOeiQ bBFnil65s+NIOrhWIWDmk2KaS5+MWtQNxTf42KSTtvVh5La/RvTUlK6C5eZzSEcEybJd 31vij7bUVfU3yTBNMhjvLiMxL1U7Y5J9+OGgo75m1GwW0hcBCwPZ4uEu7kAZnEqZhWeV 01z32GahkjmcVJXUKOi3mA4qvb//t90fpzVvjaPB4xCwQbuzUuknQnsC36QDDV8dOORq F3PzkzLetCxHssk18JvWlgpsG/va6S/oH6QvcgNvd8bCWohTNScfCRfvVjaaLsQPzTl+ sTXw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=4oZ5iwXqrJmDcU+2qXHAQ++/SNnYAx62sujgKs8Ho4M=; b=jnbsr+nA4Vq+pSVsYBLAj3GRpWijlTVnyKn47xBdE+KNJ0SbzVCSuvXCq4gnF1Dtl8 XQ9rX1H8tFxAR/DBso2JNCJ5nyWoX8iCyOJdtfymyQw3K86DYm44TNkkLuJN9VOp2WSl IwW0jnnLychqbRVI9odWi1EI08RNTtukcLgQnjSgeQC6VrFYeFqwIbCjm384aW+nKXlT f3XU+aZ+mpGL3lo4cKjA0aIkKoK6k5QhMk9saugrBk3hY6y/Z/xM9hFh3K1kr+OadpWJ eGQKu1hwq2IQmtMtNtB3guoiJJxT9XzemgAFUZoMdhmXrs1MAAUDgiJLmqUjl2iZ2K59 G4XA== X-Gm-Message-State: AOAM532NjnWuy3wITacpiN4e+wW4xCdvz6V4yqZsr054Z1ieyTrXE3VS G6Ri0SMLq3ZnKTvcXAm3oWbZtLfkMb+x3A== X-Google-Smtp-Source: ABdhPJxdbmQMhIEDU+vkko9gQWHAA9XohINh0Vprdbh9VKuvscTT6O/MIi+1+d7Osa42nfb6ne+NjA== X-Received: by 2002:a05:6602:2293:: with SMTP id d19mr4244150iod.71.1636082411069; Thu, 04 Nov 2021 20:20:11 -0700 (PDT) Received: from dune.bsdimp.com (50-253-99-174-static.hfc.comcastbusiness.net. [50.253.99.174]) by smtp.gmail.com with ESMTPSA id v4sm3508528ilq.57.2021.11.04.20.20.09 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 04 Nov 2021 20:20:10 -0700 (PDT) From: Warner Losh To: qemu-devel@nongnu.org Subject: [PATCH v4 24/36] bsd-user/arm/target_arch_thread.h: Routines to create and switch to a thread Date: Thu, 4 Nov 2021 21:19:05 -0600 Message-Id: <20211105031917.87837-25-imp@bsdimp.com> X-Mailer: git-send-email 2.33.0 In-Reply-To: <20211105031917.87837-1-imp@bsdimp.com> References: <20211105031917.87837-1-imp@bsdimp.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Received-SPF: none client-ip=2607:f8b0:4864:20::d32; envelope-from=imp@bsdimp.com; helo=mail-io1-xd32.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, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_NONE=0.001 autolearn=unavailable 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: , Cc: Stacey Son , qemu-trivial@nongnu.org, Michael Tokarev , Richard Henderson , Philippe Mathieu-Daude , Laurent Vivier , Kyle Evans , Warner Losh Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Implement target_thread_init (to create a thread) and target_set_upcall (to switch to a thread) for arm. Signed-off-by: Stacey Son Signed-off-by: Kyle Evans Signed-off-by: Warner Losh Reviewed-by: Kyle Evans --- bsd-user/arm/target_arch_thread.h | 82 +++++++++++++++++++++++++++++++ 1 file changed, 82 insertions(+) create mode 100644 bsd-user/arm/target_arch_thread.h diff --git a/bsd-user/arm/target_arch_thread.h b/bsd-user/arm/target_arch_thread.h new file mode 100644 index 0000000000..11c7f76583 --- /dev/null +++ b/bsd-user/arm/target_arch_thread.h @@ -0,0 +1,82 @@ +/* + * arm thread support + * + * Copyright (c) 2013 Stacey D. Son + * + * 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 . + */ +#ifndef _TARGET_ARCH_THREAD_H_ +#define _TARGET_ARCH_THREAD_H_ + +/* Compare to arm/arm/vm_machdep.c cpu_set_upcall_kse() */ +static inline void target_thread_set_upcall(CPUARMState *env, abi_ulong entry, + abi_ulong arg, abi_ulong stack_base, abi_ulong stack_size) +{ + abi_ulong sp; + + /* + * Make sure the stack is properly aligned. + * arm/include/param.h (STACKLIGN() macro) + */ + sp = (u_int)(stack_base + stack_size) & ~0x7; + + /* sp = stack base */ + env->regs[13] = sp; + /* pc = start function entry */ + env->regs[15] = entry & 0xfffffffe; + /* r0 = arg */ + env->regs[0] = arg; + env->spsr = ARM_CPU_MODE_USR; + /* + * Thumb mode is encoded by the low bit in the entry point (since ARM can't + * execute at odd addresses). When it's set, set the Thumb bit (T) in the + * CPSR. + */ + cpsr_write(env, (entry & 1) * CPSR_T, CPSR_T, CPSRWriteByInstr); +} + +static inline void target_thread_init(struct target_pt_regs *regs, + struct image_info *infop) +{ + abi_long stack = infop->start_stack; + memset(regs, 0, sizeof(*regs)); + regs->ARM_cpsr = ARM_CPU_MODE_USR; + /* + * Thumb mode is encoded by the low bit in the entry point (since ARM can't + * execute at odd addresses). When it's set, set the Thumb bit (T) in the + * CPSR. + */ + if (infop->entry & 1) { + regs->ARM_cpsr |= CPSR_T; + } + regs->ARM_pc = infop->entry & 0xfffffffe; + regs->ARM_sp = stack; + if (bsd_type == target_freebsd) { + regs->ARM_lr = infop->entry & 0xfffffffe; + } + /* + * FreeBSD kernel passes the ps_strings pointer in r0. This is used by some + * programs to set status messages that we see in ps. bsd-user doesn't + * support that functionality, so it's ignored. When set to 0, FreeBSD's csu + * code ignores it. For the static case, r1 and r2 are effectively ignored + * by the csu __startup() routine. For the dynamic case, rtld saves r0 but + * generates r1 and r2 and passes them into the csu _startup. + * + * r0 ps_strings 0 passed since ps arg setting not supported + * r1 obj_main ignored by _start(), so 0 passed + * r2 cleanup generated by rtld or ignored by _start(), so 0 passed + */ +} + +#endif /* !_TARGET_ARCH_THREAD_H_ */ -- 2.33.0