NetBSD/sys/compat/netbsd32/netbsd32_exec_elf32.c

210 lines
6.4 KiB
C

/* $NetBSD: netbsd32_exec_elf32.c,v 1.27 2007/04/22 08:29:58 dsl Exp $ */
/* from: NetBSD: exec_aout.c,v 1.15 1996/09/26 23:34:46 cgd Exp */
/*
* Copyright (c) 1998, 2001 Matthew R. Green.
* 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.
*/
/*
* 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: netbsd32_exec_elf32.c,v 1.27 2007/04/22 08:29:58 dsl Exp $");
#define ELFSIZE 32
#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/exec_elf.h>
#include <sys/resourcevar.h>
#include <sys/signal.h>
#include <sys/signalvar.h>
#include <sys/kauth.h>
#include <compat/netbsd32/netbsd32.h>
#include <compat/netbsd32/netbsd32_exec.h>
#include <machine/frame.h>
#include <machine/netbsd32_machdep.h>
int netbsd32_copyinargs(struct exec_package *, struct ps_strings *,
void *, size_t, const void *, const void *);
int ELFNAME2(netbsd32,probe_noteless)(struct lwp *, struct exec_package *epp,
void *eh, char *itp, vaddr_t *pos);
extern int ELFNAME2(netbsd,signature)(struct lwp *, struct exec_package *,
Elf_Ehdr *);
int
ELFNAME2(netbsd32,probe)(struct lwp *l, struct exec_package *epp,
void *eh, char *itp, vaddr_t *pos)
{
int error;
if ((error = ELFNAME2(netbsd,signature)(l, epp, eh)) != 0)
return error;
return ELFNAME2(netbsd32,probe_noteless)(l, epp, eh, itp, pos);
}
int
ELFNAME2(netbsd32,probe_noteless)(struct lwp *l, struct exec_package *epp,
void *eh, char *itp, vaddr_t *pos)
{
int error;
if (itp) {
/* Translate interpreter name if needed */
if ((error = emul_find_interp(l, epp, itp)) != 0)
return error;
}
epp->ep_flags |= EXEC_32;
epp->ep_vm_minaddr = VM_MIN_ADDRESS;
epp->ep_vm_maxaddr = USRSTACK32;
#ifdef ELF_INTERP_NON_RELOCATABLE
*pos = ELF_LINK_ADDR;
#endif
return 0;
}
/* round up and down to page boundaries. */
#define ELF_ROUND(a, b) (((a) + (b) - 1) & ~((b) - 1))
#define ELF_TRUNC(a, b) ((a) & ~((b) - 1))
/*
* Copy arguments onto the stack in the normal way, but add some
* extra information in case of dynamic binding.
*/
int
netbsd32_elf32_copyargs(struct lwp *l, struct exec_package *pack,
struct ps_strings *arginfo, char **stackp, void *argp)
{
size_t len;
AuxInfo ai[ELF_AUX_ENTRIES], *a;
struct elf_args *ap;
int error;
if ((error = netbsd32_copyargs(l, pack, arginfo, stackp, argp)) != 0)
return error;
a = ai;
/*
* Push extra arguments on the stack needed by dynamically
* linked binaries
*/
if ((ap = (struct elf_args *)pack->ep_emul_arg)) {
a->a_type = AT_PHDR;
a->a_v = ap->arg_phaddr;
a++;
a->a_type = AT_PHENT;
a->a_v = ap->arg_phentsize;
a++;
a->a_type = AT_PHNUM;
a->a_v = ap->arg_phnum;
a++;
a->a_type = AT_PAGESZ;
a->a_v = PAGE_SIZE;
a++;
a->a_type = AT_BASE;
a->a_v = ap->arg_interp;
a++;
a->a_type = AT_FLAGS;
a->a_v = 0;
a++;
a->a_type = AT_ENTRY;
a->a_v = ap->arg_entry;
a++;
a->a_type = AT_EUID;
a->a_v = kauth_cred_geteuid(l->l_cred);
a++;
a->a_type = AT_RUID;
a->a_v = kauth_cred_getuid(l->l_cred);
a++;
a->a_type = AT_EGID;
a->a_v = kauth_cred_getegid(l->l_cred);
a++;
a->a_type = AT_RGID;
a->a_v = kauth_cred_getgid(l->l_cred);
a++;
free((char *)ap, M_TEMP);
pack->ep_emul_arg = NULL;
}
a->a_type = AT_NULL;
a->a_v = 0;
a++;
len = (a - ai) * sizeof(AuxInfo);
if ((error = copyout(ai, *stackp, len)) != 0)
return error;
*stackp += len;
return 0;
}