--- /dev/null
+/* $OpenBSD: m68k4k_exec.c,v 1.1 1997/01/13 11:07:52 niklas Exp $ */
+/* $NetBSD: m68k4k_exec.c,v 1.1 1996/09/10 22:01:20 thorpej Exp $ */
+
+/*
+ * Copyright (c) 1993, 1994 Christopher G. Demetriou
+ * All rights reserved.
+ *
+ * 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. All advertising materials mentioning features or use of this software
+ * must display the following acknowledgement:
+ * This product includes software developed by Christopher G. Demetriou.
+ * 4. The name of the author may not be used to endorse or promote products
+ * derived from this software without specific prior written permission
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
+ */
+
+/*
+ * Exec glue to provide compatibility with older {Net,Open}BSD m68k4k
+ * exectuables.
+ *
+ * Taken directly from kern/exec_aout.c and frobbed to map text and
+ * data as m68k4k executables expect.
+ *
+ * This module only works on machines with NBPG == 4096. It's not clear
+ * that making it work on other machines is worth the trouble.
+ */
+
+#if !defined(__m68k__)
+#error YOU GOTTA BE KIDDING!
+#endif
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/proc.h>
+#include <sys/malloc.h>
+#include <sys/vnode.h>
+#include <sys/exec.h>
+#include <sys/resourcevar.h>
+
+#include <vm/vm.h>
+
+#include <compat/m68k4k/m68k4k_exec.h>
+
+int exec_m68k4k_prep_zmagic __P((struct proc *, struct exec_package *));
+int exec_m68k4k_prep_nmagic __P((struct proc *, struct exec_package *));
+int exec_m68k4k_prep_omagic __P((struct proc *, struct exec_package *));
+
+/*
+ * exec_m68k4k_makecmds(): Check if it's an a.out-format executable
+ * with an m68k4k magic number.
+ *
+ * Given a proc pointer and an exec package pointer, see if the referent
+ * of the epp is in a.out format. Just check 'standard' magic numbers for
+ * this architecture.
+ *
+ * This function, in the former case, or the hook, in the latter, is
+ * responsible for creating a set of vmcmds which can be used to build
+ * the process's vm space and inserting them into the exec package.
+ */
+
+int
+exec_m68k4k_makecmds(p, epp)
+ struct proc *p;
+ struct exec_package *epp;
+{
+ u_long midmag, magic;
+ u_short mid;
+ int error;
+ struct exec *execp = epp->ep_hdr;
+
+ /* See note above... */
+ if (M68K4K_LDPGSZ != NBPG)
+ return ENOEXEC;
+
+ if (epp->ep_hdrvalid < sizeof(struct exec))
+ return ENOEXEC;
+
+ midmag = ntohl(execp->a_midmag);
+ mid = (midmag >> 16) & 0x3ff;
+ magic = midmag & 0xffff;
+
+ midmag = mid << 16 | magic;
+
+ switch (midmag) {
+ case (MID_M68K4K << 16) | ZMAGIC:
+ error = exec_m68k4k_prep_zmagic(p, epp);
+ break;
+ case (MID_M68K4K << 16) | NMAGIC:
+ error = exec_m68k4k_prep_nmagic(p, epp);
+ break;
+ case (MID_M68K4K << 16) | OMAGIC:
+ error = exec_m68k4k_prep_omagic(p, epp);
+ break;
+ default:
+ error = ENOEXEC;
+ }
+
+ if (error)
+ kill_vmcmds(&epp->ep_vmcmds);
+
+ return error;
+}
+
+/*
+ * exec_m68k4k_prep_zmagic(): Prepare an m68k4k ZMAGIC binary's exec package
+ *
+ * First, set of the various offsets/lengths in the exec package.
+ *
+ * Then, mark the text image busy (so it can be demand paged) or error
+ * out if this is not possible. Finally, set up vmcmds for the
+ * text, data, bss, and stack segments.
+ */
+
+int
+exec_m68k4k_prep_zmagic(p, epp)
+ struct proc *p;
+ struct exec_package *epp;
+{
+ struct exec *execp = epp->ep_hdr;
+
+ epp->ep_taddr = M68K4K_USRTEXT;
+ epp->ep_tsize = execp->a_text;
+ epp->ep_daddr = epp->ep_taddr + execp->a_text;
+ epp->ep_dsize = execp->a_data + execp->a_bss;
+ epp->ep_entry = execp->a_entry;
+
+ /*
+ * check if vnode is in open for writing, because we want to
+ * demand-page out of it. if it is, don't do it, for various
+ * reasons
+ */
+ if ((execp->a_text != 0 || execp->a_data != 0) &&
+ epp->ep_vp->v_writecount != 0) {
+#ifdef DIAGNOSTIC
+ if (epp->ep_vp->v_flag & VTEXT)
+ panic("exec: a VTEXT vnode has writecount != 0\n");
+#endif
+ return ETXTBSY;
+ }
+ epp->ep_vp->v_flag |= VTEXT;
+
+ /* set up command for text segment */
+ NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_pagedvn, execp->a_text,
+ epp->ep_taddr, epp->ep_vp, 0, VM_PROT_READ|VM_PROT_EXECUTE);
+
+ /* set up command for data segment */
+ NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_pagedvn, execp->a_data,
+ epp->ep_daddr, epp->ep_vp, execp->a_text,
+ VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE);
+
+ /* set up command for bss segment */
+ NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero, execp->a_bss,
+ epp->ep_daddr + execp->a_data, NULLVP, 0,
+ VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE);
+
+ return exec_setup_stack(p, epp);
+}
+
+/*
+ * exec_m68k4k_prep_nmagic(): Prepare a m68k4k NMAGIC binary's exec package
+ */
+
+int
+exec_m68k4k_prep_nmagic(p, epp)
+ struct proc *p;
+ struct exec_package *epp;
+{
+ struct exec *execp = epp->ep_hdr;
+ long bsize, baddr;
+
+ epp->ep_taddr = M68K4K_USRTEXT;
+ epp->ep_tsize = execp->a_text;
+ epp->ep_daddr = roundup(epp->ep_taddr + execp->a_text,
+ M68K4K_LDPGSZ);
+ epp->ep_dsize = execp->a_data + execp->a_bss;
+ epp->ep_entry = execp->a_entry;
+
+ /* set up command for text segment */
+ NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn, execp->a_text,
+ epp->ep_taddr, epp->ep_vp, sizeof(struct exec),
+ VM_PROT_READ|VM_PROT_EXECUTE);
+
+ /* set up command for data segment */
+ NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn, execp->a_data,
+ epp->ep_daddr, epp->ep_vp, execp->a_text + sizeof(struct exec),
+ VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE);
+
+ /* set up command for bss segment */
+ baddr = roundup(epp->ep_daddr + execp->a_data, NBPG);
+ bsize = epp->ep_daddr + epp->ep_dsize - baddr;
+ if (bsize > 0)
+ NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero, bsize, baddr,
+ NULLVP, 0, VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE);
+
+ return exec_setup_stack(p, epp);
+}
+
+/*
+ * exec_m68k4k_prep_omagic(): Prepare a m68k4k OMAGIC binary's exec package
+ */
+
+int
+exec_m68k4k_prep_omagic(p, epp)
+ struct proc *p;
+ struct exec_package *epp;
+{
+ struct exec *execp = epp->ep_hdr;
+ long dsize, bsize, baddr;
+
+ epp->ep_taddr = M68K4K_USRTEXT;
+ epp->ep_tsize = execp->a_text;
+ epp->ep_daddr = epp->ep_taddr + execp->a_text;
+ epp->ep_dsize = execp->a_data + execp->a_bss;
+ epp->ep_entry = execp->a_entry;
+
+ /* set up command for text and data segments */
+ NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn,
+ execp->a_text + execp->a_data, epp->ep_taddr, epp->ep_vp,
+ sizeof(struct exec), VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE);
+
+ /* set up command for bss segment */
+ baddr = roundup(epp->ep_daddr + execp->a_data, NBPG);
+ bsize = epp->ep_daddr + epp->ep_dsize - baddr;
+ if (bsize > 0)
+ NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero, bsize, baddr,
+ NULLVP, 0, VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE);
+
+ /*
+ * Make sure (# of pages) mapped above equals (vm_tsize + vm_dsize);
+ * obreak(2) relies on this fact. Both `vm_tsize' and `vm_dsize' are
+ * computed (in execve(2)) by rounding *up* `ep_tsize' and `ep_dsize'
+ * respectively to page boundaries.
+ * Compensate `ep_dsize' for the amount of data covered by the last
+ * text page.
+ */
+ dsize = epp->ep_dsize + execp->a_text - roundup(execp->a_text, NBPG);
+ epp->ep_dsize = (dsize > 0) ? dsize : 0;
+ return exec_setup_stack(p, epp);
+}
--- /dev/null
+/* $OpenBSD: m68k4k_exec.h,v 1.1 1997/01/13 11:07:53 niklas Exp $ */
+/* $NetBSD: m68k4k_exec.h,v 1.1 1996/09/10 22:01:21 thorpej Exp $ */
+
+/*-
+ * Copyright (c) 1996 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Jason R. Thorpe.
+ *
+ * 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. All advertising materials mentioning features or use of this software
+ * must display the following acknowledgement:
+ * This product includes software developed by the NetBSD
+ * Foundation, Inc. and its contributors.
+ * 4. Neither the name of The NetBSD Foundation 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 NETBSD FOUNDATION, INC. 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.
+ */
+
+#ifndef _M68K4K_EXEC_H_
+#define _M68K4K_EXEC_H_
+
+#define M68K4K_LDPGSZ 4096
+#define M68K4K_USRTEXT M68K4K_LDPGSZ
+
+int exec_m68k4k_makecmds __P((struct proc *, struct exec_package *));
+
+#endif /* _M68K4K_EXEC_H_ */
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