NetBSD/sys/compat/sunos/sun_exec.c

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/* $NetBSD: sun_exec.c,v 1.6 1994/07/12 00:34:31 gwr Exp $ */
/*
* Copyright (c) 1993 Theo de Raadt
* 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. 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
*
* 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.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/filedesc.h>
#include <sys/kernel.h>
#include <sys/proc.h>
#include <sys/mount.h>
#include <sys/malloc.h>
#include <sys/namei.h>
#include <sys/vnode.h>
#include <sys/file.h>
#include <sys/exec.h>
#include <sys/resourcevar.h>
#include <sys/wait.h>
#include <sys/mman.h>
#include <vm/vm.h>
#include <vm/vm_param.h>
#include <vm/vm_map.h>
#include <vm/vm_kern.h>
#include <vm/vm_pager.h>
#include <machine/cpu.h>
#include <machine/reg.h>
#include <machine/exec.h>
#include <compat/sunos/exec.h>
#ifdef sparc
#define sun_exec_aout_prep_zmagic exec_aout_prep_zmagic
#define sun_exec_aout_prep_nmagic exec_aout_prep_nmagic
#define sun_exec_aout_prep_omagic exec_aout_prep_omagic
#endif
int
sun_exec_aout_makecmds(p, epp)
struct proc *p;
struct exec_package *epp;
{
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struct sun_exec *sunmag = epp->ep_hdr;
int error = ENOEXEC;
if(sunmag->a_machtype != SUN_M_NATIVE)
return (ENOEXEC);
switch (sunmag->a_magic) {
case ZMAGIC:
error = sun_exec_aout_prep_zmagic(p, epp);
break;
case NMAGIC:
error = sun_exec_aout_prep_nmagic(p, epp);
break;
case OMAGIC:
error = sun_exec_aout_prep_omagic(p, epp);
break;
}
if (error==0)
epp->ep_emul = EMUL_SUNOS;
return error;
}
/*
* the code below is only needed for sun3 emulation.
*/
#ifndef sparc
/* suns keep data seg aligned to SEGSIZ because of sun custom mmu */
#define SEGSIZ 0x20000
#define SUN_N_TXTADDR(x,m) __LDPGSZ
#define SUN_N_DATADDR(x,m) (((m)==OMAGIC) ? \
(SUN_N_TXTADDR(x,m) + (x).a_text) : \
(SEGSIZ + ((SUN_N_TXTADDR(x,m) + (x).a_text - 1) & ~(SEGSIZ-1))))
#define SUN_N_BSSADDR(x,m) (SUN_N_DATADDR(x,m)+(x).a_data)
#define SUN_N_TXTOFF(x,m) ((m)==ZMAGIC ? 0 : sizeof (struct exec))
#define SUN_N_DATOFF(x,m) (SUN_N_TXTOFF(x,m) + (x).a_text)
/*
* sun_exec_aout_prep_zmagic(): Prepare a SunOS 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
sun_exec_aout_prep_zmagic(p, epp)
struct proc *p;
struct exec_package *epp;
{
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struct exec *execp = epp->ep_hdr;
struct exec_vmcmd *ccmdp;
epp->ep_taddr = SUN_N_TXTADDR(*execp, ZMAGIC);
epp->ep_tsize = execp->a_text;
epp->ep_daddr = SUN_N_DATADDR(*execp, ZMAGIC);
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) &&
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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 */
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NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_pagedvn, execp->a_text,
epp->ep_taddr, epp->ep_vp, SUN_N_TXTOFF(*execp, ZMAGIC),
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VM_PROT_READ|VM_PROT_EXECUTE);
/* set up command for data segment */
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NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_pagedvn, execp->a_data,
epp->ep_daddr, epp->ep_vp, SUN_N_DATOFF(*execp, ZMAGIC),
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VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE);
/* set up command for bss segment */
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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);
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return exec_aout_setup_stack(p, epp);
}
/*
* sun_exec_aout_prep_nmagic(): Prepare a SunOS NMAGIC binary's exec package
*/
int
sun_exec_aout_prep_nmagic(p, epp)
struct proc *p;
struct exec_package *epp;
{
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struct exec *execp = epp->ep_hdr;
struct exec_vmcmd *ccmdp;
long bsize, baddr;
epp->ep_taddr = SUN_N_TXTADDR(*execp, NMAGIC);
epp->ep_tsize = execp->a_text;
epp->ep_daddr = SUN_N_DATADDR(*execp, NMAGIC);
epp->ep_dsize = execp->a_data + execp->a_bss;
epp->ep_entry = execp->a_entry;
/* set up command for text segment */
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NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn, execp->a_text,
epp->ep_taddr, epp->ep_vp, SUN_N_TXTOFF(*execp, NMAGIC),
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VM_PROT_READ|VM_PROT_EXECUTE);
/* set up command for data segment */
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NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn, execp->a_data,
epp->ep_daddr, epp->ep_vp, SUN_N_DATOFF(*execp, NMAGIC),
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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;
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if (bsize > 0)
NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero, bsize, baddr,
NULLVP, 0, VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE);
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return exec_aout_setup_stack(p, epp);
}
/*
* sun_exec_aout_prep_omagic(): Prepare a SunOS OMAGIC binary's exec package
*/
int
sun_exec_aout_prep_omagic(p, epp)
struct proc *p;
struct exec_package *epp;
{
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struct exec *execp = epp->ep_hdr;
struct exec_vmcmd *ccmdp;
long bsize, baddr;
epp->ep_taddr = SUN_N_TXTADDR(*execp, OMAGIC);
epp->ep_tsize = execp->a_text;
epp->ep_daddr = SUN_N_DATADDR(*execp, OMAGIC);
epp->ep_dsize = execp->a_data + execp->a_bss;
epp->ep_entry = execp->a_entry;
/* set up command for text and data segments */
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NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn,
execp->a_text + execp->a_data, epp->ep_taddr, epp->ep_vp,
SUN_N_TXTOFF(*execp, OMAGIC), VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE);
/* set up command for bss segment */
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baddr = roundup(epp->ep_daddr + execp->a_data, NBPG);
bsize = epp->ep_daddr + epp->ep_dsize - baddr;
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if (bsize > 0)
NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero, bsize, baddr,
NULLVP, 0, VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE);
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return exec_aout_setup_stack(p, epp);
}
#endif /* !sparc */