183 lines
6.2 KiB
C
183 lines
6.2 KiB
C
/* $NetBSD: compat_exec.c,v 1.14 2005/12/11 12:19:56 christos 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.
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
__KERNEL_RCSID(0, "$NetBSD: compat_exec.c,v 1.14 2005/12/11 12:19:56 christos Exp $");
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/proc.h>
|
|
#include <sys/vnode.h>
|
|
#include <sys/exec.h>
|
|
#include <sys/resourcevar.h>
|
|
|
|
/*
|
|
* exec_aout_prep_oldzmagic():
|
|
* Prepare the vmcmds to build a vmspace for an old ZMAGIC
|
|
* binary. [386BSD/BSDI/4.4BSD/NetBSD0.8]
|
|
*
|
|
* Cloned from exec_aout_prep_zmagic() in kern/exec_aout.c; a more verbose
|
|
* description of operation is there.
|
|
* There were copies of this in the mac68k, hp300, and i386 ports.
|
|
*/
|
|
int
|
|
exec_aout_prep_oldzmagic(l, epp)
|
|
struct lwp *l;
|
|
struct exec_package *epp;
|
|
{
|
|
struct exec *execp = epp->ep_hdr;
|
|
int error;
|
|
|
|
epp->ep_taddr = 0;
|
|
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;
|
|
|
|
error = vn_marktext(epp->ep_vp);
|
|
if (error)
|
|
return (error);
|
|
|
|
/* set up command for text segment */
|
|
NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_pagedvn, execp->a_text,
|
|
epp->ep_taddr, epp->ep_vp, PAGE_SIZE, /* XXX CLBYTES? */
|
|
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 + PAGE_SIZE, /* XXX CLBYTES? */
|
|
VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE);
|
|
|
|
/* set up command for bss segment */
|
|
if (execp->a_bss)
|
|
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 (*epp->ep_esch->es_setup_stack)(l, epp);
|
|
}
|
|
|
|
|
|
/*
|
|
* exec_aout_prep_oldnmagic():
|
|
* Prepare the vmcmds to build a vmspace for an old NMAGIC
|
|
* binary. [BSDI]
|
|
*
|
|
* Cloned from exec_aout_prep_nmagic() in kern/exec_aout.c; with text starting
|
|
* at 0.
|
|
* XXX: There must be a better way to share this code.
|
|
*/
|
|
int
|
|
exec_aout_prep_oldnmagic(l, epp)
|
|
struct lwp *l;
|
|
struct exec_package *epp;
|
|
{
|
|
struct exec *execp = epp->ep_hdr;
|
|
long bsize, baddr;
|
|
|
|
epp->ep_taddr = 0;
|
|
epp->ep_tsize = execp->a_text;
|
|
epp->ep_daddr = roundup(epp->ep_taddr + execp->a_text, AOUT_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, PAGE_SIZE);
|
|
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 (*epp->ep_esch->es_setup_stack)(l, epp);
|
|
}
|
|
|
|
|
|
/*
|
|
* exec_aout_prep_oldomagic():
|
|
* Prepare the vmcmds to build a vmspace for an old OMAGIC
|
|
* binary. [BSDI]
|
|
*
|
|
* Cloned from exec_aout_prep_omagic() in kern/exec_aout.c; with text starting
|
|
* at 0.
|
|
* XXX: There must be a better way to share this code.
|
|
*/
|
|
int
|
|
exec_aout_prep_oldomagic(l, epp)
|
|
struct lwp *l;
|
|
struct exec_package *epp;
|
|
{
|
|
struct exec *execp = epp->ep_hdr;
|
|
long dsize, bsize, baddr;
|
|
|
|
epp->ep_taddr = 0;
|
|
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, PAGE_SIZE);
|
|
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,
|
|
PAGE_SIZE);
|
|
epp->ep_dsize = (dsize > 0) ? dsize : 0;
|
|
return (*epp->ep_esch->es_setup_stack)(l, epp);
|
|
}
|