281 lines
9.6 KiB
C
281 lines
9.6 KiB
C
/* $NetBSD: netbsd32_exec_aout.c,v 1.19 2004/02/20 17:04:27 drochner Exp $ */
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/* from: NetBSD: exec_aout.c,v 1.15 1996/09/26 23:34:46 cgd Exp */
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/*
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* Copyright (c) 1998, 2001 Matthew R. Green.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* Copyright (c) 1993, 1994 Christopher G. Demetriou
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Christopher G. Demetriou.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: netbsd32_exec_aout.c,v 1.19 2004/02/20 17:04:27 drochner Exp $");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/proc.h>
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#include <sys/malloc.h>
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#include <sys/vnode.h>
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#include <sys/exec.h>
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#include <sys/exec_aout.h>
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#include <sys/resourcevar.h>
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#include <sys/signal.h>
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#include <sys/signalvar.h>
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#include <compat/netbsd32/netbsd32.h>
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#ifndef EXEC_AOUT
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#define EXEC_AOUT
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#endif
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#include <compat/netbsd32/netbsd32_exec.h>
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#include <machine/frame.h>
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#include <machine/netbsd32_machdep.h>
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int netbsd32_copyinargs __P((struct exec_package *, struct ps_strings *,
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void *, size_t, const void *, const void *));
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/*
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* exec_netbsd32_makecmds(): Check if it's an netbsd32 a.out format
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* executable.
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*
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* Given a proc pointer and an exec package pointer, see if the referent
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* of the epp is in netbsd32 a.out format. Check 'standard' magic
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* numbers for this architecture.
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*
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* This function, in the former case, or the hook, in the latter, is
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* responsible for creating a set of vmcmds which can be used to build
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* the process's vm space and inserting them into the exec package.
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*/
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int
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exec_netbsd32_makecmds(p, epp)
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struct proc *p;
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struct exec_package *epp;
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{
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netbsd32_u_long midmag, magic;
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u_short mid;
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int error;
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struct netbsd32_exec *execp = epp->ep_hdr;
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if (epp->ep_hdrvalid < sizeof(struct netbsd32_exec))
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return ENOEXEC;
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midmag = (netbsd32_u_long)ntohl(execp->a_midmag);
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mid = (midmag >> 16) & 0x3ff;
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magic = midmag & 0xffff;
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midmag = mid << 16 | magic;
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/* this is already needed by setup_stack() */
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epp->ep_flags |= EXEC_32;
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switch (midmag) {
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case (NETBSD32_MID_MACHINE << 16) | ZMAGIC:
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error = netbsd32_exec_aout_prep_zmagic(p, epp);
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break;
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case (NETBSD32_MID_MACHINE << 16) | NMAGIC:
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error = netbsd32_exec_aout_prep_nmagic(p, epp);
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break;
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case (NETBSD32_MID_MACHINE << 16) | OMAGIC:
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error = netbsd32_exec_aout_prep_omagic(p, epp);
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break;
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default:
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/* Invalid magic */
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error = ENOEXEC;
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break;
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}
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if (error) {
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kill_vmcmds(&epp->ep_vmcmds);
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epp->ep_flags &= ~EXEC_32;
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}
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return error;
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}
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/*
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* netbsd32_exec_aout_prep_zmagic(): Prepare a 'native' ZMAGIC binary's
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* exec package
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*
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* First, set of the various offsets/lengths in the exec package.
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*
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* Then, mark the text image busy (so it can be demand paged) or error
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* out if this is not possible. Finally, set up vmcmds for the
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* text, data, bss, and stack segments.
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*/
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int
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netbsd32_exec_aout_prep_zmagic(p, epp)
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struct proc *p;
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struct exec_package *epp;
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{
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struct netbsd32_exec *execp = epp->ep_hdr;
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int error;
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epp->ep_taddr = AOUT_LDPGSZ;
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epp->ep_tsize = execp->a_text;
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epp->ep_daddr = epp->ep_taddr + execp->a_text;
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epp->ep_dsize = execp->a_data + execp->a_bss;
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epp->ep_entry = execp->a_entry;
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epp->ep_vm_minaddr = VM_MIN_ADDRESS;
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epp->ep_vm_maxaddr = VM_MAXUSER_ADDRESS32;
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error = vn_marktext(epp->ep_vp);
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if (error)
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return (error);
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/* set up command for text segment */
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NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_pagedvn, execp->a_text,
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epp->ep_taddr, epp->ep_vp, 0, VM_PROT_READ|VM_PROT_EXECUTE);
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/* set up command for data segment */
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NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_pagedvn, execp->a_data,
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epp->ep_daddr, epp->ep_vp, execp->a_text,
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VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE);
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/* set up command for bss segment */
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if (execp->a_bss > 0)
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NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero, execp->a_bss,
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epp->ep_daddr + execp->a_data, NULLVP, 0,
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VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE);
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return (*epp->ep_esch->es_setup_stack)(p, epp);
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}
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/*
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* netbsd32_exec_aout_prep_nmagic(): Prepare a 'native' NMAGIC binary's
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* exec package
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*/
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int
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netbsd32_exec_aout_prep_nmagic(p, epp)
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struct proc *p;
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struct exec_package *epp;
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{
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struct netbsd32_exec *execp = epp->ep_hdr;
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long bsize, baddr;
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epp->ep_taddr = AOUT_LDPGSZ;
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epp->ep_tsize = execp->a_text;
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epp->ep_daddr = roundup(epp->ep_taddr + execp->a_text, AOUT_LDPGSZ);
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epp->ep_dsize = execp->a_data + execp->a_bss;
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epp->ep_entry = execp->a_entry;
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epp->ep_vm_minaddr = VM_MIN_ADDRESS;
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epp->ep_vm_maxaddr = VM_MAXUSER_ADDRESS32;
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/* set up command for text segment */
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NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn, execp->a_text,
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epp->ep_taddr, epp->ep_vp, sizeof(struct netbsd32_exec),
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VM_PROT_READ|VM_PROT_EXECUTE);
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/* set up command for data segment */
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NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn, execp->a_data,
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epp->ep_daddr, epp->ep_vp, execp->a_text + sizeof(struct netbsd32_exec),
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VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE);
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/* set up command for bss segment */
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baddr = roundup(epp->ep_daddr + execp->a_data, PAGE_SIZE);
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bsize = epp->ep_daddr + epp->ep_dsize - baddr;
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if (bsize > 0)
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NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero, bsize, baddr,
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NULLVP, 0, VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE);
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return (*epp->ep_esch->es_setup_stack)(p, epp);
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}
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/*
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* netbsd32_exec_aout_prep_omagic(): Prepare a 'native' OMAGIC binary's
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* exec package
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*/
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int
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netbsd32_exec_aout_prep_omagic(p, epp)
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struct proc *p;
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struct exec_package *epp;
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{
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struct netbsd32_exec *execp = epp->ep_hdr;
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long dsize, bsize, baddr;
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epp->ep_taddr = AOUT_LDPGSZ;
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epp->ep_tsize = execp->a_text;
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epp->ep_daddr = epp->ep_taddr + execp->a_text;
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epp->ep_dsize = execp->a_data + execp->a_bss;
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epp->ep_entry = execp->a_entry;
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epp->ep_vm_minaddr = VM_MIN_ADDRESS;
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epp->ep_vm_maxaddr = VM_MAXUSER_ADDRESS32;
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/* set up command for text and data segments */
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NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn,
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execp->a_text + execp->a_data, epp->ep_taddr, epp->ep_vp,
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sizeof(struct netbsd32_exec), VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE);
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/* set up command for bss segment */
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baddr = roundup(epp->ep_daddr + execp->a_data, PAGE_SIZE);
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bsize = epp->ep_daddr + epp->ep_dsize - baddr;
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if (bsize > 0)
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NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero, bsize, baddr,
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NULLVP, 0, VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE);
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/*
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* Make sure (# of pages) mapped above equals (vm_tsize + vm_dsize);
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* obreak(2) relies on this fact. Both `vm_tsize' and `vm_dsize' are
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* computed (in execve(2)) by rounding *up* `ep_tsize' and `ep_dsize'
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* respectively to page boundaries.
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* Compensate `ep_dsize' for the amount of data covered by the last
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* text page.
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*/
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dsize = epp->ep_dsize + execp->a_text - roundup(execp->a_text,
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PAGE_SIZE);
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epp->ep_dsize = (dsize > 0) ? dsize : 0;
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return (*epp->ep_esch->es_setup_stack)(p, epp);
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}
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