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 B90E0C433F5 for ; Mon, 8 Nov 2021 04:10:31 +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 485186113A for ; Mon, 8 Nov 2021 04:10:31 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 485186113A 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]:35060 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1mjvzK-0003eX-FA for qemu-devel@archiver.kernel.org; Sun, 07 Nov 2021 23:10:30 -0500 Received: from eggs.gnu.org ([209.51.188.92]:48450) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mjvi2-0006op-BG for qemu-devel@nongnu.org; Sun, 07 Nov 2021 22:52:38 -0500 Received: from [2607:f8b0:4864:20::129] (port=39456 helo=mail-il1-x129.google.com) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1mjvhz-0002uz-2I for qemu-devel@nongnu.org; Sun, 07 Nov 2021 22:52:37 -0500 Received: by mail-il1-x129.google.com with SMTP id x9so15559212ilu.6 for ; Sun, 07 Nov 2021 19:52:34 -0800 (PST) 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=PvUeTMgN885XhJuKwa4LoMcKbwULkKoBW0eTfmjnXuT0KtKY4bL4ZwKhqNkWLbyg2F yLnWWoSVBPunLqZA3wieBmnI/aIKLVCbMO8ouYrmntFh/9vCmAAtXYPsuNj2kW8B06D5 2v+2sboCWdWClzcac2u92UEDGl/xFyd+54tK/ZkAYUYsp2qiObysJ4dEbIpJibQd+cKn m/7AkpsImVe5k4Rd8f7oCHcFL7lpW2i6lc0X0VGRLZT1O+LBlF1ZNdmJSM/VbmaGMTb/ WQU7EXXrXzJamGWAe6zlovFiK+t6tWIJKkHlY0Roknfpg+XNEOtKu5O63tK9BQUY/s4n zgAA== 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=N724P0oclTh0R0n9AJOEqvdOCLdxleB2j3eOcZmQLqwGyp4K1CXv162YTZfI5G09b1 QRAlLIuj4RdJLYgQg/rjpT2cZMO3fV/A5/8IhBw5Ffbi2dCBRQRUlzg+ULYKbUiqdVSR WQmLxNfplYNI/FW+BuvZg9mHbVSCyW+Idk15it7FAGeuKYprdmN3izrtIRt69Gu32boP Y1KlW5AeFxoy4RkANR6ljE8HOm3ajBzHQ/0LkVerEDebMMV0ifMsH2w8iXXRLokdpd2n lBXlPjIxVNzR3GjslzO/XMdYe+q3KzLsR9KOOe2yZqVRtpPVuHWI+ksEBAlhKo4RIpFh Ft0w== X-Gm-Message-State: AOAM533CmH+JGXAWx/272TUweXvW3jkiBWInTt/+mkPxTc227BeWvnh0 ldBzsbxzzEhXuv4G44l93ZhHPV+W/sOkSg== X-Google-Smtp-Source: ABdhPJz8xGzgiab25RBf/itPVeHqnz0njYapsXV1UTiJ3llF7+cP1k5Cgbx/pQEen50H7NATQvAXVQ== X-Received: by 2002:a92:dc0c:: with SMTP id t12mr46060285iln.198.1636343553575; Sun, 07 Nov 2021 19:52:33 -0800 (PST) Received: from dune.bsdimp.com (50-253-99-174-static.hfc.comcastbusiness.net. [50.253.99.174]) by smtp.gmail.com with ESMTPSA id x15sm876909iob.8.2021.11.07.19.52.32 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 07 Nov 2021 19:52:33 -0800 (PST) From: Warner Losh To: qemu-devel@nongnu.org Subject: [PATCH v5 25/37] bsd-user/arm/target_arch_thread.h: Routines to create and switch to a thread Date: Sun, 7 Nov 2021 20:51:24 -0700 Message-Id: <20211108035136.43687-26-imp@bsdimp.com> X-Mailer: git-send-email 2.33.0 In-Reply-To: <20211108035136.43687-1-imp@bsdimp.com> References: <20211108035136.43687-1-imp@bsdimp.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Host-Lookup-Failed: Reverse DNS lookup failed for 2607:f8b0:4864:20::129 (failed) Received-SPF: none client-ip=2607:f8b0:4864:20::129; envelope-from=imp@bsdimp.com; helo=mail-il1-x129.google.com X-Spam_score_int: -10 X-Spam_score: -1.1 X-Spam_bar: - X-Spam_report: (-1.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, PDS_HP_HELO_NORDNS=0.001, RCVD_IN_DNSWL_NONE=-0.0001, RDNS_NONE=0.793, SPF_HELO_NONE=0.001, SPF_NONE=0.001 autolearn=no 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, Kyle Evans , Michael Tokarev , Laurent Vivier , Philippe Mathieu-Daude , Richard Henderson , 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