282 lines
8.6 KiB
C
282 lines
8.6 KiB
C
/* $NetBSD: exec_ecoff.c,v 1.11 2000/04/11 04:37:50 chs Exp $ */
|
|
|
|
/*
|
|
* Copyright (c) 1994 Adam Glass
|
|
* Copyright (c) 1993, 1994, 1996, 1999 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
|
|
* for the NetBSD Project.
|
|
* 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/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 <sys/exec_ecoff.h>
|
|
|
|
/*
|
|
* exec_ecoff_makecmds(): Check if it's an ecoff-format executable.
|
|
*
|
|
* Given a proc pointer and an exec package pointer, see if the referent
|
|
* of the epp is in ecoff format. Check 'standard' magic numbers for
|
|
* this architecture. If that fails, return failure.
|
|
*
|
|
* This function 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_ecoff_makecmds(p, epp)
|
|
struct proc *p;
|
|
struct exec_package *epp;
|
|
{
|
|
int error;
|
|
struct ecoff_exechdr *execp = epp->ep_hdr;
|
|
|
|
if (epp->ep_hdrvalid < ECOFF_HDR_SIZE)
|
|
return ENOEXEC;
|
|
|
|
if (ECOFF_BADMAG(execp))
|
|
return ENOEXEC;
|
|
|
|
error = cpu_exec_ecoff_hook(p, epp);
|
|
|
|
/*
|
|
* if there was an error or there are already vmcmds set up,
|
|
* we return. (the latter can happen if cpu_exec_ecoff_hook()
|
|
* recursively invokes check_exec() to handle loading of a
|
|
* dynamically linked binary's shared loader.
|
|
*/
|
|
if (error || epp->ep_vmcmds.evs_cnt)
|
|
return (error);
|
|
|
|
/*
|
|
* prepare the exec package to map the executable.
|
|
*/
|
|
switch (execp->a.magic) {
|
|
case ECOFF_OMAGIC:
|
|
error = exec_ecoff_prep_omagic(p, epp, epp->ep_hdr,
|
|
epp->ep_vp);
|
|
break;
|
|
case ECOFF_NMAGIC:
|
|
error = exec_ecoff_prep_nmagic(p, epp, epp->ep_hdr,
|
|
epp->ep_vp);
|
|
break;
|
|
case ECOFF_ZMAGIC:
|
|
error = exec_ecoff_prep_zmagic(p, epp, epp->ep_hdr,
|
|
epp->ep_vp);
|
|
break;
|
|
default:
|
|
return ENOEXEC;
|
|
}
|
|
|
|
/* set up the stack */
|
|
if (!error)
|
|
error = exec_ecoff_setup_stack(p, epp);
|
|
|
|
if (error)
|
|
kill_vmcmds(&epp->ep_vmcmds);
|
|
|
|
return error;
|
|
}
|
|
|
|
/*
|
|
* exec_ecoff_setup_stack(): Set up the stack segment for an ecoff
|
|
* executable.
|
|
*
|
|
* Note that the ep_ssize parameter must be set to be the current stack
|
|
* limit; this is adjusted in the body of execve() to yield the
|
|
* appropriate stack segment usage once the argument length is
|
|
* calculated.
|
|
*
|
|
* This function returns an int for uniformity with other (future) formats'
|
|
* stack setup functions. They might have errors to return.
|
|
*/
|
|
int
|
|
exec_ecoff_setup_stack(p, epp)
|
|
struct proc *p;
|
|
struct exec_package *epp;
|
|
{
|
|
|
|
epp->ep_maxsaddr = USRSTACK - MAXSSIZ;
|
|
epp->ep_minsaddr = USRSTACK;
|
|
epp->ep_ssize = p->p_rlimit[RLIMIT_STACK].rlim_cur;
|
|
|
|
/*
|
|
* set up commands for stack. note that this takes *two*, one to
|
|
* map the part of the stack which we can access, and one to map
|
|
* the part which we can't.
|
|
*
|
|
* arguably, it could be made into one, but that would require the
|
|
* addition of another mapping proc, which is unnecessary
|
|
*
|
|
* note that in memory, things assumed to be: 0 ... ep_maxsaddr
|
|
* <stack> ep_minsaddr
|
|
*/
|
|
NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero,
|
|
((epp->ep_minsaddr - epp->ep_ssize) - epp->ep_maxsaddr),
|
|
epp->ep_maxsaddr, NULLVP, 0, VM_PROT_NONE);
|
|
NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero, epp->ep_ssize,
|
|
(epp->ep_minsaddr - epp->ep_ssize), NULLVP, 0,
|
|
VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* exec_ecoff_prep_omagic(): Prepare a ECOFF OMAGIC binary's exec package
|
|
*/
|
|
int
|
|
exec_ecoff_prep_omagic(p, epp, execp, vp)
|
|
struct proc *p;
|
|
struct exec_package *epp;
|
|
struct ecoff_exechdr *execp;
|
|
struct vnode *vp;
|
|
{
|
|
struct ecoff_aouthdr *eap = &execp->a;
|
|
|
|
epp->ep_taddr = ECOFF_SEGMENT_ALIGN(execp, eap->text_start);
|
|
epp->ep_tsize = eap->tsize;
|
|
epp->ep_daddr = ECOFF_SEGMENT_ALIGN(execp, eap->data_start);
|
|
epp->ep_dsize = eap->dsize + eap->bsize;
|
|
epp->ep_entry = eap->entry;
|
|
|
|
/* set up command for text and data segments */
|
|
NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn,
|
|
eap->tsize + eap->dsize, epp->ep_taddr, vp,
|
|
ECOFF_TXTOFF(execp),
|
|
VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE);
|
|
|
|
/* set up command for bss segment */
|
|
if (eap->bsize > 0)
|
|
NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero, eap->bsize,
|
|
ECOFF_SEGMENT_ALIGN(execp, eap->bss_start), NULLVP, 0,
|
|
VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* exec_ecoff_prep_nmagic(): Prepare a 'native' NMAGIC ECOFF binary's exec
|
|
* package.
|
|
*/
|
|
int
|
|
exec_ecoff_prep_nmagic(p, epp, execp, vp)
|
|
struct proc *p;
|
|
struct exec_package *epp;
|
|
struct ecoff_exechdr *execp;
|
|
struct vnode *vp;
|
|
{
|
|
struct ecoff_aouthdr *eap = &execp->a;
|
|
|
|
epp->ep_taddr = ECOFF_SEGMENT_ALIGN(execp, eap->text_start);
|
|
epp->ep_tsize = eap->tsize;
|
|
epp->ep_daddr = ECOFF_ROUND(eap->data_start, ECOFF_LDPGSZ);
|
|
epp->ep_dsize = eap->dsize + eap->bsize;
|
|
epp->ep_entry = eap->entry;
|
|
|
|
/* set up command for text segment */
|
|
NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn, epp->ep_tsize,
|
|
epp->ep_taddr, vp, ECOFF_TXTOFF(execp),
|
|
VM_PROT_READ|VM_PROT_EXECUTE);
|
|
|
|
/* set up command for data segment */
|
|
NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_readvn, epp->ep_dsize,
|
|
epp->ep_daddr, vp, ECOFF_DATOFF(execp),
|
|
VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE);
|
|
|
|
/* set up command for bss segment */
|
|
if (eap->bsize > 0)
|
|
NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero, eap->bsize,
|
|
ECOFF_SEGMENT_ALIGN(execp, eap->bss_start), NULLVP, 0,
|
|
VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* exec_ecoff_prep_zmagic(): Prepare a ECOFF ZMAGIC binary's exec package
|
|
*
|
|
* First, set 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_ecoff_prep_zmagic(p, epp, execp, vp)
|
|
struct proc *p;
|
|
struct exec_package *epp;
|
|
struct ecoff_exechdr *execp;
|
|
struct vnode *vp;
|
|
{
|
|
struct ecoff_aouthdr *eap = &execp->a;
|
|
|
|
epp->ep_taddr = ECOFF_SEGMENT_ALIGN(execp, eap->text_start);
|
|
epp->ep_tsize = eap->tsize;
|
|
epp->ep_daddr = ECOFF_SEGMENT_ALIGN(execp, eap->data_start);
|
|
epp->ep_dsize = eap->dsize + eap->bsize;
|
|
epp->ep_entry = eap->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 ((eap->tsize != 0 || eap->dsize != 0) &&
|
|
vp->v_writecount != 0) {
|
|
#ifdef DIAGNOSTIC
|
|
if (vp->v_flag & VTEXT)
|
|
panic("exec: a VTEXT vnode has writecount != 0\n");
|
|
#endif
|
|
return ETXTBSY;
|
|
}
|
|
vn_marktext(vp);
|
|
|
|
/* set up command for text segment */
|
|
NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_pagedvn, eap->tsize,
|
|
epp->ep_taddr, vp, ECOFF_TXTOFF(execp),
|
|
VM_PROT_READ|VM_PROT_EXECUTE);
|
|
|
|
/* set up command for data segment */
|
|
NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_pagedvn, eap->dsize,
|
|
epp->ep_daddr, vp, ECOFF_DATOFF(execp),
|
|
VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE);
|
|
|
|
/* set up command for bss segment */
|
|
NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_zero, eap->bsize,
|
|
ECOFF_SEGMENT_ALIGN(execp, eap->bss_start), NULLVP, 0,
|
|
VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE);
|
|
|
|
return 0;
|
|
}
|