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📁 ..
📄 altivec.c(4.74 KB)
📄 autoconf.c(2.69 KB)
📄 bus_machdep.c(22.3 KB)
📄 busdma_machdep.c(31.78 KB)
📄 clock.c(8.72 KB)
📄 copyinout.c(15.08 KB)
📄 cpu.c(23.74 KB)
📄 cpu_subr64.S(2.99 KB)
📄 db_disasm.c(31.78 KB)
📄 db_hwwatch.c(1.71 KB)
📄 db_interface.c(1.78 KB)
📄 db_trace.c(8.56 KB)
📄 dump_machdep.c(1.63 KB)
📄 elf32_machdep.c(11.71 KB)
📄 elf64_machdep.c(12 KB)
📄 elf_common.c(4.21 KB)
📄 exec_machdep.c(29.55 KB)
📄 fpu.c(6.47 KB)
📄 gdb_machdep.c(3.5 KB)
📄 genassym.c(10.78 KB)
📄 in_cksum.c(6.64 KB)
📄 interrupt.c(3.9 KB)
📄 intr_machdep.c(15.53 KB)
📄 iommu_if.m(1.74 KB)
📄 machdep.c(21.72 KB)
📄 mem.c(8.4 KB)
📄 minidump_machdep.c(9.09 KB)
📄 mp_machdep.c(8.81 KB)
📄 nexus.c(7.06 KB)
📄 openpic.c(11.35 KB)
📄 pic_if.m(2.45 KB)
📄 platform.c(9.15 KB)
📄 platform_if.m(6.15 KB)
📄 pmap_dispatch.c(8.92 KB)
📄 ptrace_machdep.c(3.58 KB)
📄 sc_machdep.c(2.21 KB)
📄 setjmp.S(2.45 KB)
📄 sigcode32.S(2.4 KB)
📄 sigcode64.S(2.94 KB)
📄 stack_machdep.c(3.1 KB)
📄 support.S(11.06 KB)
📄 swtch32.S(7.31 KB)
📄 swtch64.S(10.59 KB)
📄 syncicache.c(2.51 KB)
📄 sys_machdep.c(1.73 KB)
📄 trap.c(25.06 KB)
📄 uio_machdep.c(4.04 KB)
📄 uma_machdep.c(2.89 KB)
📄 vm_machdep.c(7.5 KB)

Editing: uio_machdep.c

/*-
 * SPDX-License-Identifier: BSD-3-Clause
 *
 * Copyright (c) 2004 Alan L. Cox <alc@cs.rice.edu>
 * Copyright (c) 1982, 1986, 1991, 1993
 *	The Regents of the University of California.  All rights reserved.
 * (c) UNIX System Laboratories, Inc.
 * All or some portions of this file are derived from material licensed
 * to the University of California by American Telephone and Telegraph
 * Co. or Unix System Laboratories, Inc. and are reproduced herein with
 * the permission of UNIX System Laboratories, Inc.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *	@(#)kern_subr.c	8.3 (Berkeley) 1/21/94
 */

#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <sys/proc.h>
#include <sys/uio.h>
#include <sys/sf_buf.h>

#include <vm/vm.h>
#include <vm/vm_page.h>

#include <machine/cpu.h>
#include <machine/vmparam.h>
#include <machine/md_var.h>

/*
 * Implement uiomove(9) from physical memory using sf_bufs to
 * avoid the creation and destruction of ephemeral mappings.
 */
int
uiomove_fromphys(vm_page_t ma[], vm_offset_t offset, int n, struct uio *uio)
{
	struct thread *td = curthread;
	struct iovec *iov;
	void *cp;
	vm_offset_t page_offset;
	vm_page_t m;
	size_t cnt;
	int error = 0;
	int save = 0;
	struct sf_buf *sf;

KASSERT(uio->uio_rw == UIO_READ || uio->uio_rw == UIO_WRITE,
	    ("uiomove_fromphys: mode"));
	KASSERT(uio->uio_segflg != UIO_USERSPACE || uio->uio_td == curthread,
	    ("uiomove_fromphys proc"));

save = td->td_pflags & TDP_DEADLKTREAT;
	td->td_pflags |= TDP_DEADLKTREAT;
	while (n > 0 && uio->uio_resid) {
		iov = uio->uio_iov;
		cnt = iov->iov_len;
		if (cnt == 0) {
			uio->uio_iov++;
			uio->uio_iovcnt--;
			continue;
		}
		if (cnt > n)
			cnt = n;
		page_offset = offset & PAGE_MASK;
		cnt = min(cnt, PAGE_SIZE - page_offset);

m = ma[offset >> PAGE_SHIFT];
		sf = sf_buf_alloc(m, 0);
		cp = (char*)sf_buf_kva(sf) + page_offset;

switch (uio->uio_segflg) {
			case UIO_USERSPACE:
				maybe_yield();
				if (uio->uio_rw == UIO_READ)
					error = copyout(cp, iov->iov_base, cnt);
				else
					error = copyin(iov->iov_base, cp, cnt);
				if (error) {
					sf_buf_free(sf);
					goto out;
				}
				break;
			case UIO_SYSSPACE:
				if (uio->uio_rw == UIO_READ)
					bcopy(cp, iov->iov_base, cnt);
				else
					bcopy(iov->iov_base, cp, cnt);
				break;
			case UIO_NOCOPY:
				break;
		}
		sf_buf_free(sf);
		iov->iov_base = (char *)iov->iov_base + cnt;
		iov->iov_len -= cnt;
		uio->uio_resid -= cnt;
		uio->uio_offset += cnt;
		offset += cnt;
		n -= cnt;
	}
out:
	if (save == 0)
		td->td_pflags &= ~TDP_DEADLKTREAT;
	return (error);
}

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Editing: uio_machdep.c

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