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 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 DCEDAC433EF for ; Tue, 1 Feb 2022 12:16:17 +0000 (UTC) Received: from localhost ([::1]:58694 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1nEs52-00060E-Qy for qemu-devel@archiver.kernel.org; Tue, 01 Feb 2022 07:16:16 -0500 Received: from eggs.gnu.org ([209.51.188.92]:57270) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1nEr7x-0005IK-7c for qemu-devel@nongnu.org; Tue, 01 Feb 2022 06:15:13 -0500 Received: from [2607:f8b0:4864:20::d31] (port=43873 helo=mail-io1-xd31.google.com) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1nEr7v-0003iP-D7 for qemu-devel@nongnu.org; Tue, 01 Feb 2022 06:15:12 -0500 Received: by mail-io1-xd31.google.com with SMTP id z199so20681715iof.10 for ; Tue, 01 Feb 2022 03:15:10 -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=LZKC0QaOKwxbEUnfj7dWcrcxfW+qKzGj8MUewXGWUGU=; b=WT893l4lDfXwBaIRRgEUFN1gjhD0kkTpC+nrw1ma6oHI0iS3tNuHHpmVS8znKNbchi p8AX6c4V3UBKn+nKNPic9ixDJlO2bBo/4P4//qHVbq6H9ppFt2m4HoIxJDF1dGC1Mxpf 30cchC2D6IcJzExJDesXIun0ee36YVp8/4kg4jCO9F2am6lQP/GMScWwHad4aBW0Cm45 4EaGHjK5msFjAcee7a5nZ4LfFJpqW4aztRQDzVhRHi49TdxiIoy0VPOclt2o/lHlvKKA odKN35gr4BDYtrCzgsmHA+qw2bbyudqp+ITTz+pWrtfLAx8KiBt+flUUFoBaoqEfM828 9k/Q== 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=LZKC0QaOKwxbEUnfj7dWcrcxfW+qKzGj8MUewXGWUGU=; b=p/QZW7IkYcyq/bwkc3KjZ5fsLo6TkFTRbau137XoO2xFXcdMUTmrVjW04djeS37LYs 7cR5wwwTy/P4FB0dgep5rTY0wg8A5aopyrbmOJLkQTqNQgtGxGEdtapBKii2rdUWlFbo IFT+BHVfyzsBkEcf5bZajNLF32cgXFpvGqF4Tram92dba/YyyG9YSOGUrJpka+K3L8VZ 7irvUFlxS3xCQyVmxMwyE3h0jVn97fVsA18c49j86aBKWQAGet4vQn0Be/gmTd7K+DJ3 qlq/ukW8SU6CVS2aEE9kGcqynA6ssq1NrvtseEEi1o5CSHQgE34HSB2jwD0JMKCsWVDm OTZA== X-Gm-Message-State: AOAM530nDyI0NlYWSKXeTwUWwDMhGlbAmgY5oa/hDkUlboqdwWnbYR91 yzxu8bjSJIh4PkBNWp4+fa9rACty/Ch54g== X-Google-Smtp-Source: ABdhPJxc92OFaR2C3AUQQuJJb8SiRjKLi+cc98cWVsFLBu02yVblff2YhrnOnexNU7sItvOUYgUcPA== X-Received: by 2002:a05:6638:13d1:: with SMTP id i17mr6193658jaj.182.1643714109820; Tue, 01 Feb 2022 03:15:09 -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 w5sm13526852ilu.83.2022.02.01.03.15.09 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 01 Feb 2022 03:15:09 -0800 (PST) From: Warner Losh To: qemu-devel@nongnu.org Subject: [PATCH 21/22] bsd-user/bsd-file.h: Meat of the write system calls Date: Tue, 1 Feb 2022 04:14:54 -0700 Message-Id: <20220201111455.52511-22-imp@bsdimp.com> X-Mailer: git-send-email 2.33.1 In-Reply-To: <20220201111455.52511-1-imp@bsdimp.com> References: <20220201111455.52511-1-imp@bsdimp.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Host-Lookup-Failed: Reverse DNS lookup failed for 2607:f8b0:4864:20::d31 (failed) Received-SPF: none client-ip=2607:f8b0:4864:20::d31; envelope-from=imp@bsdimp.com; helo=mail-io1-xd31.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, T_SCC_BODY_TEXT_LINE=-0.01 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: Peter Maydell , Stacey Son , arrowd@FreeBSD.org, Kyle Evans , Richard Henderson , def@FreeBSD.org, jrtc27@FreeBSD.org, Warner Losh , Brad Smith Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Implement write, writev, pwrite and pwritev and connect them to the system call dispatch routine. Signed-off-by: Stacey Son Signed-off-by: Kyle Evans Signed-off-by: Warner Losh --- bsd-user/bsd-file.h | 85 +++++++++++++++++++++++++++++++++++ bsd-user/freebsd/os-syscall.c | 23 ++++++++++ 2 files changed, 108 insertions(+) diff --git a/bsd-user/bsd-file.h b/bsd-user/bsd-file.h index 5934cbd5612..2047256a555 100644 --- a/bsd-user/bsd-file.h +++ b/bsd-user/bsd-file.h @@ -41,6 +41,11 @@ ssize_t safe_pread(int fd, void *buf, size_t nbytes, off_t offset); ssize_t safe_readv(int fd, const struct iovec *iov, int iovcnt); ssize_t safe_preadv(int fd, const struct iovec *iov, int iovcnt, off_t offset); +ssize_t safe_write(int fd, void *buf, size_t nbytes); +ssize_t safe_pwrite(int fd, void *buf, size_t nbytes, off_t offset); +ssize_t safe_writev(int fd, const struct iovec *iov, int iovcnt); +ssize_t safe_pwritev(int fd, const struct iovec *iov, int iovcnt, off_t offset); + /* read(2) */ static inline abi_long do_bsd_read(abi_long arg1, abi_long arg2, abi_long arg3) { @@ -115,4 +120,84 @@ static inline abi_long do_bsd_preadv(void *cpu_env, abi_long arg1, return ret; } +/* write(2) */ +static inline abi_long do_bsd_write(abi_long arg1, abi_long arg2, abi_long arg3) +{ + abi_long nbytes, ret; + void *p; + + /* nbytes < 0 implies that it was larger than SIZE_MAX. */ + nbytes = arg3; + if (nbytes < 0) { + return -TARGET_EINVAL; + } + p = lock_user(VERIFY_READ, arg2, nbytes, 1); + if (p == NULL) { + return -TARGET_EFAULT; + } + ret = get_errno(safe_write(arg1, p, arg3)); + unlock_user(p, arg2, 0); + + return ret; +} + +/* pwrite(2) */ +static inline abi_long do_bsd_pwrite(void *cpu_env, abi_long arg1, + abi_long arg2, abi_long arg3, abi_long arg4, abi_long arg5, abi_long arg6) +{ + abi_long ret; + void *p; + + p = lock_user(VERIFY_READ, arg2, arg3, 1); + if (p == NULL) { + return -TARGET_EFAULT; + } + if (regpairs_aligned(cpu_env) != 0) { + arg4 = arg5; + arg5 = arg6; + } + ret = get_errno(safe_pwrite(arg1, p, arg3, target_arg64(arg4, arg5))); + unlock_user(p, arg2, 0); + + return ret; +} + +/* writev(2) */ +static inline abi_long do_bsd_writev(abi_long arg1, abi_long arg2, + abi_long arg3) +{ + abi_long ret; + struct iovec *vec = lock_iovec(VERIFY_READ, arg2, arg3, 1); + + if (vec != NULL) { + ret = get_errno(safe_writev(arg1, vec, arg3)); + unlock_iovec(vec, arg2, arg3, 0); + } else { + ret = -host_to_target_errno(errno); + } + + return ret; +} + +/* pwritev(2) */ +static inline abi_long do_bsd_pwritev(void *cpu_env, abi_long arg1, + abi_long arg2, abi_long arg3, abi_long arg4, abi_long arg5, abi_long arg6) +{ + abi_long ret; + struct iovec *vec = lock_iovec(VERIFY_READ, arg2, arg3, 1); + + if (vec != NULL) { + if (regpairs_aligned(cpu_env) != 0) { + arg4 = arg5; + arg5 = arg6; + } + ret = get_errno(safe_pwritev(arg1, vec, arg3, target_arg64(arg4, arg5))); + unlock_iovec(vec, arg2, arg3, 0); + } else { + ret = -host_to_target_errno(errno); + } + + return ret; +} + #endif /* !BSD_FILE_H_ */ diff --git a/bsd-user/freebsd/os-syscall.c b/bsd-user/freebsd/os-syscall.c index dda79af53de..f52c9e3c306 100644 --- a/bsd-user/freebsd/os-syscall.c +++ b/bsd-user/freebsd/os-syscall.c @@ -50,6 +50,13 @@ safe_syscall3(ssize_t, readv, int, fd, const struct iovec *, iov, int, iovcnt); safe_syscall4(ssize_t, preadv, int, fd, const struct iovec *, iov, int, iovcnt, off_t, offset); +safe_syscall3(ssize_t, write, int, fd, void *, buf, size_t, nbytes); +safe_syscall4(ssize_t, pwrite, int, fd, void *, buf, size_t, nbytes, off_t, + offset); +safe_syscall3(ssize_t, writev, int, fd, const struct iovec *, iov, int, iovcnt); +safe_syscall4(ssize_t, pwritev, int, fd, const struct iovec *, iov, int, iovcnt, + off_t, offset); + void target_set_brk(abi_ulong new_brk) { } @@ -236,6 +243,22 @@ abi_long do_freebsd_syscall(void *cpu_env, int num, abi_long arg1, ret = do_bsd_readv(arg1, arg2, arg3); break; + case TARGET_FREEBSD_NR_write: /* write(2) */ + ret = do_bsd_write(arg1, arg2, arg3); + break; + + case TARGET_FREEBSD_NR_pwrite: /* pwrite(2) */ + ret = do_bsd_pwrite(cpu_env, arg1, arg2, arg3, arg4, arg5, arg6); + break; + + case TARGET_FREEBSD_NR_writev: /* writev(2) */ + ret = do_bsd_writev(arg1, arg2, arg3); + break; + + case TARGET_FREEBSD_NR_pwritev: /* pwritev(2) */ + ret = do_bsd_pwritev(cpu_env, arg1, arg2, arg3, arg4, arg5, arg6); + break; + default: gemu_log("qemu: unsupported syscall: %d\n", num); ret = -TARGET_ENOSYS; -- 2.33.1