NetBSD/sys/compat/ibcs2/ibcs2_exec_elf32.c

144 lines
4.1 KiB
C

/* $NetBSD: ibcs2_exec_elf32.c,v 1.2 2001/07/14 02:05:05 christos Exp $ */
/*
* Copyright (c) 1994, 1995, 1998 Scott Bartram
* Copyright (c) 1994 Adam Glass
* Copyright (c) 1993, 1994 Christopher G. Demetriou
* All rights reserved.
*
* originally from kern/exec_ecoff.c
*
* 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 Scott Bartram.
* 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.
*/
#define ELFSIZE 32
#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 <machine/cpu.h>
#include <machine/reg.h>
#include <machine/ibcs2_machdep.h>
#include <compat/ibcs2/ibcs2_types.h>
#include <compat/ibcs2/ibcs2_exec.h>
#include <compat/ibcs2/ibcs2_errno.h>
#include <compat/ibcs2/ibcs2_util.h>
static int ibcs2_elf32_signature __P((struct proc *p, struct exec_package *,
Elf32_Ehdr *));
/*
* The SCO compiler adds the string "SCO" to the .notes section of all
* binaries I've seen so far.
*
* XXX - probably should only compare the id in the actual ELF notes struct
*/
#define SCO_SIGNATURE "\004\0\0\0\014\0\0\0\001\0\0\0SCO\0"
static int
ibcs2_elf32_signature(p, epp, eh)
struct proc *p;
struct exec_package *epp;
Elf32_Ehdr *eh;
{
size_t shsize = sizeof(Elf32_Shdr) * eh->e_shnum;
size_t i;
static const char signature[] = SCO_SIGNATURE;
char buf[sizeof(signature) - 1];
Elf32_Shdr *sh;
int error;
sh = (Elf32_Shdr *)malloc(shsize, M_TEMP, M_WAITOK);
if ((error = exec_read_from(p, epp->ep_vp, eh->e_shoff, sh,
shsize)) != 0)
goto out;
for (i = 0; i < eh->e_shnum; i++) {
Elf32_Shdr *s = &sh[i];
if (s->sh_type != SHT_NOTE ||
s->sh_flags != 0 ||
s->sh_size < sizeof(signature) - 1)
continue;
if ((error = exec_read_from(p, epp->ep_vp, s->sh_offset, buf,
sizeof(signature) - 1)) != 0)
goto out;
if (memcmp(buf, signature, sizeof(signature) - 1) == 0)
goto out;
else
break; /* only one .note section so quit */
}
error = EFTYPE;
out:
free(sh, M_TEMP);
return error;
}
/*
* ibcs2_elf32_probe - search the executable for signs of SCO
*/
int
ibcs2_elf32_probe(p, epp, eh, itp, pos)
struct proc *p;
struct exec_package *epp;
void *eh;
char *itp;
vaddr_t *pos;
{
const char *bp;
int error;
size_t len;
if ((error = ibcs2_elf32_signature(p, epp, eh)) != 0)
return error;
if (itp[0]) {
if ((error = emul_find(p, NULL, epp->ep_esch->es_emul->e_path, itp, &bp, 0)))
return error;
if ((error = copystr(bp, itp, MAXPATHLEN, &len)))
return error;
free((void *)bp, M_TEMP);
}
*pos = ELF32_NO_ADDR;
return 0;
}