144 lines
4.1 KiB
C
144 lines
4.1 KiB
C
/* $NetBSD: ibcs2_exec_elf32.c,v 1.2 2001/07/14 02:05:05 christos Exp $ */
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/*
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* Copyright (c) 1994, 1995, 1998 Scott Bartram
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* Copyright (c) 1994 Adam Glass
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* Copyright (c) 1993, 1994 Christopher G. Demetriou
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* All rights reserved.
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*
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* originally from kern/exec_ecoff.c
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Scott Bartram.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#define ELFSIZE 32
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/proc.h>
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#include <sys/malloc.h>
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#include <sys/namei.h>
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#include <sys/vnode.h>
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#include <sys/mount.h>
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#include <sys/exec.h>
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#include <sys/exec_elf.h>
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#include <sys/mman.h>
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#include <machine/cpu.h>
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#include <machine/reg.h>
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#include <machine/ibcs2_machdep.h>
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#include <compat/ibcs2/ibcs2_types.h>
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#include <compat/ibcs2/ibcs2_exec.h>
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#include <compat/ibcs2/ibcs2_errno.h>
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#include <compat/ibcs2/ibcs2_util.h>
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static int ibcs2_elf32_signature __P((struct proc *p, struct exec_package *,
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Elf32_Ehdr *));
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/*
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* The SCO compiler adds the string "SCO" to the .notes section of all
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* binaries I've seen so far.
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*
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* XXX - probably should only compare the id in the actual ELF notes struct
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*/
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#define SCO_SIGNATURE "\004\0\0\0\014\0\0\0\001\0\0\0SCO\0"
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static int
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ibcs2_elf32_signature(p, epp, eh)
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struct proc *p;
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struct exec_package *epp;
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Elf32_Ehdr *eh;
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{
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size_t shsize = sizeof(Elf32_Shdr) * eh->e_shnum;
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size_t i;
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static const char signature[] = SCO_SIGNATURE;
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char buf[sizeof(signature) - 1];
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Elf32_Shdr *sh;
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int error;
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sh = (Elf32_Shdr *)malloc(shsize, M_TEMP, M_WAITOK);
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if ((error = exec_read_from(p, epp->ep_vp, eh->e_shoff, sh,
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shsize)) != 0)
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goto out;
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for (i = 0; i < eh->e_shnum; i++) {
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Elf32_Shdr *s = &sh[i];
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if (s->sh_type != SHT_NOTE ||
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s->sh_flags != 0 ||
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s->sh_size < sizeof(signature) - 1)
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continue;
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if ((error = exec_read_from(p, epp->ep_vp, s->sh_offset, buf,
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sizeof(signature) - 1)) != 0)
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goto out;
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if (memcmp(buf, signature, sizeof(signature) - 1) == 0)
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goto out;
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else
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break; /* only one .note section so quit */
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}
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error = EFTYPE;
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out:
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free(sh, M_TEMP);
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return error;
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}
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/*
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* ibcs2_elf32_probe - search the executable for signs of SCO
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*/
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int
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ibcs2_elf32_probe(p, epp, eh, itp, pos)
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struct proc *p;
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struct exec_package *epp;
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void *eh;
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char *itp;
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vaddr_t *pos;
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{
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const char *bp;
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int error;
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size_t len;
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if ((error = ibcs2_elf32_signature(p, epp, eh)) != 0)
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return error;
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if (itp[0]) {
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if ((error = emul_find(p, NULL, epp->ep_esch->es_emul->e_path, itp, &bp, 0)))
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return error;
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if ((error = copystr(bp, itp, MAXPATHLEN, &len)))
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return error;
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free((void *)bp, M_TEMP);
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}
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*pos = ELF32_NO_ADDR;
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return 0;
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}
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