Return to vax1k_subr.c CVS log

Up to [local] / sys / compat / vax1k

Annotation of sys/compat/vax1k/vax1k_subr.c, Revision 1.1

1.1     ! nbrk        1: /*     $OpenBSD: vax1k_subr.c,v 1.3 2005/11/06 22:21:33 miod Exp $     */
        !             2: /*     $NetBSD: vax1k_subr.c,v 1.2 1999/03/24 05:51:20 mrg Exp $       */
        !             3:
        !             4: /*
        !             5:  * Copyright (c) 1993, 1994, 1996 Christopher G. Demetriou
        !             6:  * All rights reserved.
        !             7:  *
        !             8:  * Redistribution and use in source and binary forms, with or without
        !             9:  * modification, are permitted provided that the following conditions
        !            10:  * are met:
        !            11:  * 1. Redistributions of source code must retain the above copyright
        !            12:  *    notice, this list of conditions and the following disclaimer.
        !            13:  * 2. Redistributions in binary form must reproduce the above copyright
        !            14:  *    notice, this list of conditions and the following disclaimer in the
        !            15:  *    documentation and/or other materials provided with the distribution.
        !            16:  * 3. All advertising materials mentioning features or use of this software
        !            17:  *    must display the following acknowledgement:
        !            18:  *      This product includes software developed by Christopher G. Demetriou.
        !            19:  * 4. The name of the author may not be used to endorse or promote products
        !            20:  *    derived from this software without specific prior written permission
        !            21:  *
        !            22:  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
        !            23:  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
        !            24:  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
        !            25:  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
        !            26:  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
        !            27:  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
        !            28:  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
        !            29:  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
        !            30:  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
        !            31:  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
        !            32:  */
        !            33:
        !            34: #include <sys/param.h>
        !            35: #include <sys/systm.h>
        !            36: #include <sys/proc.h>
        !            37: #include <sys/malloc.h>
        !            38: #include <sys/vnode.h>
        !            39: #include <sys/filedesc.h>
        !            40: #include <sys/exec.h>
        !            41: #include <sys/mman.h>
        !            42:
        !            43: #include <compat/vax1k/vax1k_exec.h>
        !            44:
        !            45: #include <uvm/uvm_extern.h>
        !            46:
        !            47: /*
        !            48:  * vax1k_map_readvn():
        !            49:  *     handle vmcmd which specifies that a vnode should be read from.
        !            50:  *     This is used to be able to read in and execute vax1k binaries
        !            51:  *     even if the page size is bigger. (cannot mmap).
        !            52:  */
        !            53: int
        !            54: vax1k_map_readvn(p, cmd)
        !            55:        struct proc *p;
        !            56:        struct exec_vmcmd *cmd;
        !            57: {
        !            58:        vaddr_t oaddr;
        !            59:        int error;
        !            60:
        !            61:        if (cmd->ev_len == 0)
        !            62:                return (0);
        !            63:
        !            64:        oaddr = cmd->ev_addr;
        !            65:        cmd->ev_addr = trunc_page(cmd->ev_addr); /* required by uvm_map */
        !            66:        error = uvm_map(&p->p_vmspace->vm_map, &cmd->ev_addr,
        !            67:                        round_page(cmd->ev_len + (oaddr - cmd->ev_addr)),
        !            68:                        NULL, UVM_UNKNOWN_OFFSET, 0,
        !            69:                        UVM_MAPFLAG(UVM_PROT_ALL, UVM_PROT_ALL, UVM_INH_COPY,
        !            70:                        UVM_ADV_NORMAL,
        !            71:                        UVM_FLAG_FIXED|UVM_FLAG_OVERLAY|UVM_FLAG_COPYONW));
        !            72:
        !            73:        if (error)
        !            74:                return error;
        !            75:
        !            76:        error = vn_rdwr(UIO_READ, cmd->ev_vp, (caddr_t)oaddr,
        !            77:            cmd->ev_len, cmd->ev_offset, UIO_USERSPACE, IO_UNIT,
        !            78:            p->p_ucred, NULL, p);
        !            79:        if (error)
        !            80:                return error;
        !            81:
        !            82:        if (cmd->ev_prot != (VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE)) {
        !            83:                /*
        !            84:                 * we had to map in the area at PROT_ALL so that vn_rdwr()
        !            85:                 * could write to it.   however, the caller seems to want
        !            86:                 * it mapped read-only, so now we are going to have to call
        !            87:                 * uvm_map_protect() to fix up the protection.  ICK.
        !            88:                 */
        !            89:                return(uvm_map_protect(&p->p_vmspace->vm_map,
        !            90:                                trunc_page(cmd->ev_addr),
        !            91:                                round_page(cmd->ev_addr + cmd->ev_len),
        !            92:                                cmd->ev_prot, FALSE));
        !            93:        }
        !            94:
        !            95:        return (0);
        !            96: }