Annotation of sys/compat/vax1k/vax1k_exec.c, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: vax1k_exec.c,v 1.2 2002/03/14 01:26:51 millert Exp $ */
! 2: /* $NetBSD: vax1k_exec.c,v 1.1 1998/08/21 13:25:47 ragge Exp $ */
! 3:
! 4: /*
! 5: * Copyright (c) 1993, 1994 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: /*
! 35: * Exec glue to provide compatibility with older NetBSD vax1k exectuables.
! 36: *
! 37: * Because NetBSD/vax now uses 4k page size, older binaries (that started
! 38: * on an 1k boundary) cannot be mmap'ed. Therefore they are read in
! 39: * (via vn_rdwr) as OMAGIC binaries and executed. This will use a little
! 40: * bit more memory, but otherwise won't affect the execution speed.
! 41: */
! 42:
! 43: #include <sys/param.h>
! 44: #include <sys/systm.h>
! 45: #include <sys/proc.h>
! 46: #include <sys/malloc.h>
! 47: #include <sys/vnode.h>
! 48: #include <sys/exec.h>
! 49: #include <sys/resourcevar.h>
! 50:
! 51: #include <compat/vax1k/vax1k_exec.h>
! 52:
! 53: int exec_vax1k_prep_anymagic(struct proc *, struct exec_package *, int);
! 54:
! 55: /*
! 56: * exec_vax1k_makecmds(): Check if it's an a.out-format executable
! 57: * with an vax1k magic number.
! 58: *
! 59: * Given a proc pointer and an exec package pointer, see if the referent
! 60: * of the epp is in a.out format. Just check 'standard' magic numbers for
! 61: * this architecture.
! 62: *
! 63: * This function, in the former case, or the hook, in the latter, is
! 64: * responsible for creating a set of vmcmds which can be used to build
! 65: * the process's vm space and inserting them into the exec package.
! 66: */
! 67:
! 68: int
! 69: exec_vax1k_makecmds(p, epp)
! 70: struct proc *p;
! 71: struct exec_package *epp;
! 72: {
! 73: u_long midmag, magic;
! 74: u_short mid;
! 75: int error;
! 76: struct exec *execp = epp->ep_hdr;
! 77:
! 78: if (epp->ep_hdrvalid < sizeof(struct exec))
! 79: return ENOEXEC;
! 80:
! 81: midmag = ntohl(execp->a_midmag);
! 82: mid = (midmag >> 16) & 0x3ff;
! 83: magic = midmag & 0xffff;
! 84:
! 85: midmag = mid << 16 | magic;
! 86:
! 87: switch (midmag) {
! 88: case (MID_VAX1K << 16) | ZMAGIC:
! 89: error = exec_vax1k_prep_anymagic(p, epp, 0);
! 90: break;
! 91:
! 92: case (MID_VAX1K << 16) | NMAGIC:
! 93: case (MID_VAX1K << 16) | OMAGIC:
! 94: error = exec_vax1k_prep_anymagic(p, epp, sizeof(struct exec));
! 95: break;
! 96:
! 97: default:
! 98: error = ENOEXEC;
! 99: }
! 100:
! 101: if (error)
! 102: kill_vmcmds(&epp->ep_vmcmds);
! 103:
! 104: return error;
! 105: }
! 106:
! 107: /*
! 108: * exec_vax1k_prep_anymagic(): Prepare an vax1k ?MAGIC binary's exec package
! 109: *
! 110: * First, set of the various offsets/lengths in the exec package.
! 111: * Note that all code is mapped RW; no protection, but because it is
! 112: * only used for compatibility it won't hurt.
! 113: *
! 114: */
! 115: int
! 116: exec_vax1k_prep_anymagic(p, epp, off)
! 117: struct proc *p;
! 118: struct exec_package *epp;
! 119: int off;
! 120: {
! 121: long etmp, tmp;
! 122: struct exec *execp = epp->ep_hdr;
! 123:
! 124: epp->ep_taddr = execp->a_entry & ~(VAX1K_USRTEXT - 1);
! 125: epp->ep_tsize = execp->a_text + execp->a_data;
! 126: epp->ep_daddr = epp->ep_tsize + epp->ep_taddr;
! 127: epp->ep_dsize = execp->a_bss;
! 128: epp->ep_entry = execp->a_entry;
! 129:
! 130: /* set up command for text segment */
! 131: NEW_VMCMD(&epp->ep_vmcmds, vax1k_map_readvn,
! 132: epp->ep_tsize, epp->ep_taddr, epp->ep_vp, off,
! 133: VM_PROT_WRITE|VM_PROT_READ|VM_PROT_EXECUTE);
! 134:
! 135: tmp = round_page(epp->ep_daddr);
! 136: etmp = execp->a_bss - (tmp - epp->ep_daddr);
! 137:
! 138: /* set up command for bss segment */
! 139: if (etmp > 0)
! 140: NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero, etmp, tmp, NULLVP, 0,
! 141: VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE);
! 142:
! 143: return exec_setup_stack(p, epp);
! 144: }
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