337 lines
10 KiB
C
337 lines
10 KiB
C
/* $NetBSD: linux_exec_aout.c,v 1.47 2001/11/13 02:08:50 lukem Exp $ */
|
|
|
|
/*-
|
|
* Copyright (c) 1995, 1998 The NetBSD Foundation, Inc.
|
|
* All rights reserved.
|
|
*
|
|
* This code is derived from software contributed to The NetBSD Foundation
|
|
* by Christos Zoulas, Frank van der Linden and Eric Haszlakiewicz.
|
|
*
|
|
* 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 the NetBSD
|
|
* Foundation, Inc. and its contributors.
|
|
* 4. Neither the name of The NetBSD Foundation nor the names of its
|
|
* contributors may be used to endorse or promote products derived
|
|
* from this software without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
|
|
* ``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 FOUNDATION OR CONTRIBUTORS
|
|
* 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.
|
|
*/
|
|
|
|
/*
|
|
* based on exec_aout.c, sunos_exec.c and svr4_exec.c
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
__KERNEL_RCSID(0, "$NetBSD: linux_exec_aout.c,v 1.47 2001/11/13 02:08:50 lukem Exp $");
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/proc.h>
|
|
#include <sys/malloc.h>
|
|
#include <sys/namei.h>
|
|
#include <sys/vnode.h>
|
|
#include <sys/mount.h>
|
|
#include <sys/exec.h>
|
|
#include <sys/exec_elf.h>
|
|
|
|
#include <sys/mman.h>
|
|
#include <sys/syscallargs.h>
|
|
|
|
#include <machine/cpu.h>
|
|
#include <machine/reg.h>
|
|
|
|
#include <compat/linux/common/linux_types.h>
|
|
#include <compat/linux/common/linux_signal.h>
|
|
#include <compat/linux/common/linux_util.h>
|
|
#include <compat/linux/common/linux_exec.h>
|
|
#include <compat/linux/common/linux_machdep.h>
|
|
|
|
#include <compat/linux/linux_syscallargs.h>
|
|
#include <compat/linux/linux_syscall.h>
|
|
|
|
int linux_aout_copyargs __P((struct exec_package *, struct ps_strings *,
|
|
char **, void *));
|
|
|
|
static int exec_linux_aout_prep_zmagic __P((struct proc *,
|
|
struct exec_package *));
|
|
static int exec_linux_aout_prep_nmagic __P((struct proc *,
|
|
struct exec_package *));
|
|
static int exec_linux_aout_prep_omagic __P((struct proc *,
|
|
struct exec_package *));
|
|
static int exec_linux_aout_prep_qmagic __P((struct proc *,
|
|
struct exec_package *));
|
|
|
|
int
|
|
linux_aout_copyargs(pack, arginfo, stackp, argp)
|
|
struct exec_package *pack;
|
|
struct ps_strings *arginfo;
|
|
char **stackp;
|
|
void *argp;
|
|
{
|
|
char **cpp = (char **)*stackp;
|
|
char **stk = (char **)*stackp;
|
|
char *dp, *sp;
|
|
size_t len;
|
|
void *nullp = NULL;
|
|
int argc = arginfo->ps_nargvstr;
|
|
int envc = arginfo->ps_nenvstr;
|
|
int error;
|
|
|
|
if ((error = copyout(&argc, cpp++, sizeof(argc))) != 0)
|
|
return error;
|
|
|
|
/* leave room for envp and argv */
|
|
cpp += 2;
|
|
if ((error = copyout(&cpp, &stk[1], sizeof (cpp))) != 0)
|
|
return error;
|
|
|
|
dp = (char *) (cpp + argc + envc + 2);
|
|
sp = argp;
|
|
|
|
/* XXX don't copy them out, remap them! */
|
|
arginfo->ps_argvstr = cpp; /* remember location of argv for later */
|
|
|
|
for (; --argc >= 0; sp += len, dp += len)
|
|
if ((error = copyout(&dp, cpp++, sizeof(dp))) != 0 ||
|
|
(error = copyoutstr(sp, dp, ARG_MAX, &len)) != 0)
|
|
return error;
|
|
|
|
if ((error = copyout(&nullp, cpp++, sizeof(nullp))) != 0)
|
|
return error;
|
|
|
|
if ((error = copyout(&cpp, &stk[2], sizeof (cpp))) != 0)
|
|
return error;
|
|
|
|
arginfo->ps_envstr = cpp; /* remember location of envp for later */
|
|
|
|
for (; --envc >= 0; sp += len, dp += len)
|
|
if ((error = copyout(&dp, cpp++, sizeof(dp))) != 0 ||
|
|
(error = copyoutstr(sp, dp, ARG_MAX, &len)) != 0)
|
|
return error;
|
|
|
|
if ((error = copyout(&nullp, cpp++, sizeof(nullp))) != 0)
|
|
return error;
|
|
|
|
*stackp = (char *)cpp;
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
exec_linux_aout_makecmds(p, epp)
|
|
struct proc *p;
|
|
struct exec_package *epp;
|
|
{
|
|
struct exec *linux_ep = epp->ep_hdr;
|
|
int machtype, magic;
|
|
int error = ENOEXEC;
|
|
|
|
magic = LINUX_N_MAGIC(linux_ep);
|
|
machtype = LINUX_N_MACHTYPE(linux_ep);
|
|
|
|
|
|
if (machtype != LINUX_MID_MACHINE)
|
|
return (ENOEXEC);
|
|
|
|
switch (magic) {
|
|
case QMAGIC:
|
|
error = exec_linux_aout_prep_qmagic(p, epp);
|
|
break;
|
|
case ZMAGIC:
|
|
error = exec_linux_aout_prep_zmagic(p, epp);
|
|
break;
|
|
case NMAGIC:
|
|
error = exec_linux_aout_prep_nmagic(p, epp);
|
|
break;
|
|
case OMAGIC:
|
|
error = exec_linux_aout_prep_omagic(p, epp);
|
|
break;
|
|
}
|
|
return error;
|
|
}
|
|
|
|
/*
|
|
* Since text starts at 0x400 in Linux ZMAGIC executables, and 0x400
|
|
* is very likely not page aligned on most architectures, it is treated
|
|
* as an NMAGIC here. XXX
|
|
*/
|
|
|
|
static int
|
|
exec_linux_aout_prep_zmagic(p, epp)
|
|
struct proc *p;
|
|
struct exec_package *epp;
|
|
{
|
|
struct exec *execp = epp->ep_hdr;
|
|
|
|
epp->ep_taddr = LINUX_N_TXTADDR(*execp, ZMAGIC);
|
|
epp->ep_tsize = execp->a_text;
|
|
epp->ep_daddr = LINUX_N_DATADDR(*execp, ZMAGIC);
|
|
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, LINUX_N_TXTOFF(*execp, ZMAGIC),
|
|
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, LINUX_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);
|
|
}
|
|
|
|
/*
|
|
* exec_aout_prep_nmagic(): Prepare Linux NMAGIC package.
|
|
* Not different from the normal stuff.
|
|
*/
|
|
|
|
static int
|
|
exec_linux_aout_prep_nmagic(p, epp)
|
|
struct proc *p;
|
|
struct exec_package *epp;
|
|
{
|
|
struct exec *execp = epp->ep_hdr;
|
|
long bsize, baddr;
|
|
|
|
epp->ep_taddr = LINUX_N_TXTADDR(*execp, NMAGIC);
|
|
epp->ep_tsize = execp->a_text;
|
|
epp->ep_daddr = LINUX_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, LINUX_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, LINUX_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);
|
|
}
|
|
|
|
/*
|
|
* exec_aout_prep_omagic(): Prepare Linux OMAGIC package.
|
|
* Business as usual.
|
|
*/
|
|
|
|
static int
|
|
exec_linux_aout_prep_omagic(p, epp)
|
|
struct proc *p;
|
|
struct exec_package *epp;
|
|
{
|
|
struct exec *execp = epp->ep_hdr;
|
|
long dsize, bsize, baddr;
|
|
|
|
epp->ep_taddr = LINUX_N_TXTADDR(*execp, OMAGIC);
|
|
epp->ep_tsize = execp->a_text;
|
|
epp->ep_daddr = LINUX_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,
|
|
LINUX_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);
|
|
|
|
/*
|
|
* 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, NBPG);
|
|
epp->ep_dsize = (dsize > 0) ? dsize : 0;
|
|
return exec_aout_setup_stack(p, epp);
|
|
}
|
|
|
|
static int
|
|
exec_linux_aout_prep_qmagic(p, epp)
|
|
struct proc *p;
|
|
struct exec_package *epp;
|
|
{
|
|
struct exec *execp = epp->ep_hdr;
|
|
|
|
epp->ep_taddr = LINUX_N_TXTADDR(*execp, QMAGIC);
|
|
epp->ep_tsize = execp->a_text;
|
|
epp->ep_daddr = LINUX_N_DATADDR(*execp, QMAGIC);
|
|
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;
|
|
}
|
|
epp->ep_vp->v_flag |= VTEXT;
|
|
|
|
/* set up command for text segment */
|
|
NEW_VMCMD(&epp->ep_vmcmds, vmcmd_map_pagedvn, execp->a_text,
|
|
epp->ep_taddr, epp->ep_vp, LINUX_N_TXTOFF(*execp, QMAGIC),
|
|
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, LINUX_N_DATOFF(*execp, QMAGIC),
|
|
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);
|
|
}
|