Annotation of sys/compat/bsdos/bsdos_exec.c, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: bsdos_exec.c,v 1.4 2001/11/06 19:53:17 miod Exp $ */
! 2:
! 3: /*
! 4: * Copyright (c) 1993, 1994 Christopher G. Demetriou
! 5: * All rights reserved.
! 6: *
! 7: * Redistribution and use in source and binary forms, with or without
! 8: * modification, are permitted provided that the following conditions
! 9: * are met:
! 10: * 1. Redistributions of source code must retain the above copyright
! 11: * notice, this list of conditions and the following disclaimer.
! 12: * 2. Redistributions in binary form must reproduce the above copyright
! 13: * notice, this list of conditions and the following disclaimer in the
! 14: * documentation and/or other materials provided with the distribution.
! 15: * 3. All advertising materials mentioning features or use of this software
! 16: * must display the following acknowledgement:
! 17: * This product includes software developed by Christopher G. Demetriou.
! 18: * 4. The name of the author may not be used to endorse or promote products
! 19: * derived from this software without specific prior written permission
! 20: *
! 21: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
! 22: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
! 23: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
! 24: * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
! 25: * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
! 26: * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
! 27: * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
! 28: * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
! 29: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
! 30: * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
! 31: */
! 32:
! 33: #include <sys/param.h>
! 34: #include <sys/systm.h>
! 35: #include <sys/proc.h>
! 36: #include <sys/signalvar.h>
! 37: #include <sys/malloc.h>
! 38: #include <sys/vnode.h>
! 39: #include <sys/exec.h>
! 40: #include <sys/resourcevar.h>
! 41: #include <uvm/uvm_extern.h>
! 42:
! 43: #if 0
! 44: #include <machine/bsdos_machdep.h>
! 45: #endif
! 46:
! 47: #include <compat/bsdos/bsdos_exec.h>
! 48: #include <compat/bsdos/bsdos_syscall.h>
! 49:
! 50: extern struct sysent bsdos_sysent[];
! 51: #ifdef SYSCALL_DEBUG
! 52: extern char *bsdos_syscallnames[];
! 53: #endif
! 54:
! 55: extern char sigcode[], esigcode[];
! 56:
! 57: struct emul emul_bsdos = {
! 58: "bsdos",
! 59: NULL,
! 60: sendsig,
! 61: BSDOS_SYS_syscall,
! 62: BSDOS_SYS_MAXSYSCALL,
! 63: bsdos_sysent,
! 64: #ifdef SYSCALL_DEBUG
! 65: bsdos_syscallnames,
! 66: #else
! 67: NULL,
! 68: #endif
! 69: 0,
! 70: copyargs,
! 71: setregs,
! 72: NULL,
! 73: sigcode,
! 74: esigcode,
! 75: };
! 76:
! 77: /*
! 78: * exec_aout_makecmds(): Check if it's an a.out-format executable.
! 79: *
! 80: * Given a proc pointer and an exec package pointer, see if the referent
! 81: * of the epp is in a.out format. First check 'standard' magic numbers for
! 82: * this architecture. If that fails, try a cpu-dependent hook.
! 83: *
! 84: * This function, in the former case, or the hook, in the latter, is
! 85: * responsible for creating a set of vmcmds which can be used to build
! 86: * the process's vm space and inserting them into the exec package.
! 87: */
! 88:
! 89: int
! 90: exec_bsdos_aout_makecmds(p, epp)
! 91: struct proc *p;
! 92: struct exec_package *epp;
! 93: {
! 94: u_long midmag, magic;
! 95: u_short mid;
! 96: int error = ENOEXEC;
! 97: struct exec *execp = epp->ep_hdr;
! 98:
! 99: if (epp->ep_hdrvalid < sizeof(struct exec))
! 100: return ENOEXEC;
! 101:
! 102: midmag = ntohl(execp->a_midmag);
! 103: mid = (midmag >> 16) & 0xffff;
! 104: magic = midmag & 0xffff;
! 105:
! 106: if (magic == 0) {
! 107: magic = (execp->a_midmag & 0xffff);
! 108: mid = MID_BSDOS;
! 109: }
! 110:
! 111: midmag = mid << 16 | magic;
! 112:
! 113: switch (midmag) {
! 114: case (MID_BSDOS << 16) | ZMAGIC:
! 115: /*
! 116: * 386BSD's ZMAGIC format:
! 117: */
! 118: error = exec_aout_prep_oldzmagic(p, epp);
! 119: break;
! 120: case (MID_BSDOS << 16) | QMAGIC:
! 121: /*
! 122: * BSDI's QMAGIC format:
! 123: * same as new ZMAGIC format, but with different magic number.
! 124: */
! 125: error = exec_aout_prep_zmagic(p, epp);
! 126: break;
! 127: case (MID_BSDOS << 16) | NMAGIC:
! 128: /*
! 129: * BSDI's NMAGIC format:
! 130: * same as NMAGIC format, but with different magic number
! 131: * and with text starting at 0.
! 132: */
! 133: error = exec_aout_prep_oldnmagic(p, epp);
! 134: break;
! 135: case (MID_BSDOS << 16) | OMAGIC:
! 136: /*
! 137: * BSDI's OMAGIC format:
! 138: * same as OMAGIC format, but with different magic number
! 139: * and with text starting at 0.
! 140: */
! 141: error = exec_aout_prep_oldomagic(p, epp);
! 142: break;
! 143: }
! 144: if (error == 0)
! 145: epp->ep_emul = &emul_bsdos;
! 146: else
! 147: kill_vmcmds(&epp->ep_vmcmds);
! 148:
! 149: return error;
! 150: }
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