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NetBSD/sys/compat/sunos/sunos_exec.c

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/* $NetBSD: sunos_exec.c,v 1.19 2000/06/06 19:04:19 soren 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
* 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 "opt_syscall_debug.h"
#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/signalvar.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 <machine/cpu.h>
#include <machine/reg.h>
#include <compat/sunos/sunos.h>
#include <compat/sunos/sunos_exec.h>
#include <compat/sunos/sunos_syscall.h>
#ifdef __sparc__
#define sunos_exec_aout_prep_zmagic exec_aout_prep_zmagic
#define sunos_exec_aout_prep_nmagic exec_aout_prep_nmagic
#define sunos_exec_aout_prep_omagic exec_aout_prep_omagic
#endif
int sunos_exec_aout_prep_zmagic __P((struct proc *, struct exec_package *));
int sunos_exec_aout_prep_nmagic __P((struct proc *, struct exec_package *));
int sunos_exec_aout_prep_omagic __P((struct proc *, struct exec_package *));
extern int nsunos_sysent;
extern struct sysent sunos_sysent[];
#ifdef SYSCALL_DEBUG
extern char *sunos_syscallnames[];
#endif
extern char sunos_sigcode[], sunos_esigcode[];
const char sunos_emul_path[] = "/emul/sunos";
struct emul emul_sunos = {
"sunos",
NULL,
sunos_sendsig,
SUNOS_SYS_syscall,
SUNOS_SYS_MAXSYSCALL,
sunos_sysent,
#ifdef SYSCALL_DEBUG
sunos_syscallnames,
#else
NULL,
#endif
0,
copyargs,
setregs,
sunos_sigcode,
sunos_esigcode,
};
int
exec_sunos_aout_makecmds(p, epp)
struct proc *p;
struct exec_package *epp;
{
struct sunos_exec *sunmag = epp->ep_hdr;
int error = ENOEXEC;
if(sunmag->a_machtype != SUNOS_M_NATIVE)
return (ENOEXEC);
switch (sunmag->a_magic) {
case ZMAGIC:
error = sunos_exec_aout_prep_zmagic(p, epp);
break;
case NMAGIC:
error = sunos_exec_aout_prep_nmagic(p, epp);
break;
case OMAGIC:
error = sunos_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 SUNOS_N_TXTADDR(x,m) __LDPGSZ
#define SUNOS_N_DATADDR(x,m) (((m)==OMAGIC) ? \
(SUNOS_N_TXTADDR(x,m) + (x).a_text) : \
(SEGSIZ + ((SUNOS_N_TXTADDR(x,m) + (x).a_text - 1) & ~(SEGSIZ-1))))
#define SUNOS_N_BSSADDR(x,m) (SUNOS_N_DATADDR(x,m)+(x).a_data)
#define SUNOS_N_TXTOFF(x,m) ((m)==ZMAGIC ? 0 : sizeof (struct exec))
#define SUNOS_N_DATOFF(x,m) (SUNOS_N_TXTOFF(x,m) + (x).a_text)
/*
* sunos_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
sunos_exec_aout_prep_zmagic(p, epp)
struct proc *p;
struct exec_package *epp;
{
struct exec *execp = epp->ep_hdr;
epp->ep_taddr = SUNOS_N_TXTADDR(*execp, ZMAGIC);
epp->ep_tsize = execp->a_text;
epp->ep_daddr = SUNOS_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) &&
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;
}
vn_marktext(epp->ep_vp);
/* set up command for text segment */
NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_pagedvn, execp->a_text,
epp->ep_taddr, epp->ep_vp, SUNOS_N_TXTOFF(*execp, ZMAGIC),
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, SUNOS_N_DATOFF(*execp, ZMAGIC),
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_aout_setup_stack(p, epp);
}
/*
* sunos_exec_aout_prep_nmagic(): Prepare a SunOS NMAGIC binary's exec package
*/
int
sunos_exec_aout_prep_nmagic(p, epp)
struct proc *p;
struct exec_package *epp;
{
struct exec *execp = epp->ep_hdr;
long bsize, baddr;
epp->ep_taddr = SUNOS_N_TXTADDR(*execp, NMAGIC);
epp->ep_tsize = execp->a_text;
epp->ep_daddr = SUNOS_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 */
NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn, execp->a_text,
epp->ep_taddr, epp->ep_vp, SUNOS_N_TXTOFF(*execp, NMAGIC),
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, SUNOS_N_DATOFF(*execp, NMAGIC),
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_aout_setup_stack(p, epp);
}
/*
* sunos_exec_aout_prep_omagic(): Prepare a SunOS OMAGIC binary's exec package
*/
int
sunos_exec_aout_prep_omagic(p, epp)
struct proc *p;
struct exec_package *epp;
{
struct exec *execp = epp->ep_hdr;
long bsize, baddr;
epp->ep_taddr = SUNOS_N_TXTADDR(*execp, OMAGIC);
epp->ep_tsize = execp->a_text;
epp->ep_daddr = SUNOS_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 */
NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn,
execp->a_text + execp->a_data, epp->ep_taddr, epp->ep_vp,
SUNOS_N_TXTOFF(*execp, OMAGIC), 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_aout_setup_stack(p, epp);
}
#endif /* !sparc */
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