1 /* $NetBSD: freebsd_exec_elf32.c,v 1.16 2006/11/16 01:32:42 christos Exp $ */
4 * Copyright (c) 1993, 1994 Christopher G. Demetriou
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. All advertising materials mentioning features or use of this software
16 * must display the following acknowledgement:
17 * This product includes software developed by Christopher G. Demetriou.
18 * 4. The name of the author may not be used to endorse or promote products
19 * derived from this software without specific prior written permission
21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
22 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
23 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
24 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
26 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
30 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
33 #include <sys/cdefs.h>
34 __KERNEL_RCSID(0, "$NetBSD: freebsd_exec_elf32.c,v 1.16 2006/11/16 01:32:42 christos Exp $");
36 #include <sys/param.h>
37 #include <sys/systm.h>
39 #include <sys/malloc.h>
40 #include <sys/vnode.h>
45 #include <sys/exec_elf.h>
47 #include <compat/sys/signal.h>
48 #include <compat/sys/signalvar.h>
50 #include <compat/freebsd/freebsd_exec.h>
51 #include <compat/common/compat_util.h>
53 #include <machine/freebsd_machdep.h>
57 ELFNAME2(freebsd
,probe
)(
59 struct exec_package
*epp
,
67 Elf_Ehdr
*eh
= (Elf_Ehdr
*) veh
;
72 static const char wantBrand
[] = FREEBSD_ELF_BRAND_STRING
;
73 static const char wantInterp
[] = FREEBSD_ELF_INTERP_PREFIX_STRING
;
76 * Insist that the executable have a brand, and that it be "FreeBSD".
77 * Newer FreeBSD binaries have OSABI set to ELFOSABI_FREEBSD. This
78 * is arguably broken, but they seem to think they need it, for
84 if ((eh
->e_ident
[EI_BRAND
] == '\0'
85 || strcmp(&eh
->e_ident
[EI_BRAND
], wantBrand
) != 0)
86 && eh
->e_ident
[EI_OSABI
] != ELFOSABI_FREEBSD
)
91 phsize
= i
* sizeof(Elf_Phdr
);
92 ph
= (Elf_Phdr
*) malloc(phsize
, M_TEMP
, M_WAITOK
);
93 if ((error
= exec_read_from(l
, epp
->ep_vp
, eh
->e_phoff
, ph
,
97 for (ephp
= ph
; i
--; ephp
++) {
98 if (ephp
->p_type
!= PT_INTERP
)
101 /* Check for "legal" intepreter name. */
102 if (ephp
->p_filesz
< sizeof wantInterp
)
105 np
= (Elf_Nhdr
*) malloc(ephp
->p_filesz
+1,
108 if (((error
= exec_read_from(l
, epp
->ep_vp
,
109 ephp
->p_offset
, np
, ephp
->p_filesz
)) != 0))
112 if (strncmp((char *)np
, wantInterp
,
113 sizeof wantInterp
- 1))
123 if ((error
= emul_find_interp(l
, epp
, itp
)))
126 #ifdef DEBUG_FREEBSD_ELF
127 printf("freebsd_elf32_probe: returning 0\n");