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netbsd32_exec_elf32.c revision 1.26
      1  1.26        ad /*	$NetBSD: netbsd32_exec_elf32.c,v 1.26 2006/07/23 22:06:09 ad Exp $	*/
      2   1.1  jdolecek /*	from: NetBSD: exec_aout.c,v 1.15 1996/09/26 23:34:46 cgd Exp */
      3   1.1  jdolecek 
      4   1.1  jdolecek /*
      5   1.7       mrg  * Copyright (c) 1998, 2001 Matthew R. Green.
      6  1.20       agc  * All rights reserved.
      7  1.20       agc  *
      8  1.20       agc  * Redistribution and use in source and binary forms, with or without
      9  1.20       agc  * modification, are permitted provided that the following conditions
     10  1.20       agc  * are met:
     11  1.20       agc  * 1. Redistributions of source code must retain the above copyright
     12  1.20       agc  *    notice, this list of conditions and the following disclaimer.
     13  1.20       agc  * 2. Redistributions in binary form must reproduce the above copyright
     14  1.20       agc  *    notice, this list of conditions and the following disclaimer in the
     15  1.20       agc  *    documentation and/or other materials provided with the distribution.
     16  1.20       agc  * 3. The name of the author may not be used to endorse or promote products
     17  1.20       agc  *    derived from this software without specific prior written permission
     18  1.20       agc  *
     19  1.20       agc  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     20  1.20       agc  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     21  1.20       agc  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     22  1.20       agc  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     23  1.20       agc  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     24  1.20       agc  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     25  1.20       agc  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     26  1.20       agc  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     27  1.20       agc  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     28  1.20       agc  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     29  1.20       agc  */
     30  1.20       agc 
     31  1.20       agc /*
     32   1.1  jdolecek  * Copyright (c) 1993, 1994 Christopher G. Demetriou
     33   1.1  jdolecek  * All rights reserved.
     34   1.1  jdolecek  *
     35   1.1  jdolecek  * Redistribution and use in source and binary forms, with or without
     36   1.1  jdolecek  * modification, are permitted provided that the following conditions
     37   1.1  jdolecek  * are met:
     38   1.1  jdolecek  * 1. Redistributions of source code must retain the above copyright
     39   1.1  jdolecek  *    notice, this list of conditions and the following disclaimer.
     40   1.1  jdolecek  * 2. Redistributions in binary form must reproduce the above copyright
     41   1.1  jdolecek  *    notice, this list of conditions and the following disclaimer in the
     42   1.1  jdolecek  *    documentation and/or other materials provided with the distribution.
     43   1.1  jdolecek  * 3. All advertising materials mentioning features or use of this software
     44   1.1  jdolecek  *    must display the following acknowledgement:
     45   1.1  jdolecek  *      This product includes software developed by Christopher G. Demetriou.
     46   1.1  jdolecek  * 4. The name of the author may not be used to endorse or promote products
     47   1.1  jdolecek  *    derived from this software without specific prior written permission
     48   1.1  jdolecek  *
     49   1.1  jdolecek  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     50   1.1  jdolecek  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     51   1.1  jdolecek  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     52   1.1  jdolecek  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     53   1.1  jdolecek  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     54   1.1  jdolecek  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     55   1.1  jdolecek  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     56   1.1  jdolecek  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     57   1.1  jdolecek  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     58   1.1  jdolecek  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     59   1.1  jdolecek  */
     60   1.8     lukem 
     61   1.8     lukem #include <sys/cdefs.h>
     62  1.26        ad __KERNEL_RCSID(0, "$NetBSD: netbsd32_exec_elf32.c,v 1.26 2006/07/23 22:06:09 ad Exp $");
     63   1.1  jdolecek 
     64   1.1  jdolecek #define	ELFSIZE		32
     65   1.1  jdolecek 
     66   1.1  jdolecek #include <sys/param.h>
     67   1.1  jdolecek #include <sys/systm.h>
     68   1.1  jdolecek #include <sys/proc.h>
     69   1.1  jdolecek #include <sys/malloc.h>
     70   1.1  jdolecek #include <sys/vnode.h>
     71   1.1  jdolecek #include <sys/exec.h>
     72   1.1  jdolecek #include <sys/exec_elf.h>
     73   1.1  jdolecek #include <sys/resourcevar.h>
     74   1.1  jdolecek #include <sys/signal.h>
     75   1.1  jdolecek #include <sys/signalvar.h>
     76  1.25      elad #include <sys/kauth.h>
     77   1.1  jdolecek 
     78   1.1  jdolecek #include <compat/netbsd32/netbsd32.h>
     79   1.1  jdolecek #include <compat/netbsd32/netbsd32_exec.h>
     80   1.1  jdolecek 
     81   1.1  jdolecek #include <machine/frame.h>
     82   1.1  jdolecek #include <machine/netbsd32_machdep.h>
     83   1.1  jdolecek 
     84  1.22     perry int netbsd32_copyinargs(struct exec_package *, struct ps_strings *,
     85  1.10      fvdl 			void *, size_t, const void *, const void *);
     86  1.23  christos int ELFNAME2(netbsd32,probe_noteless)(struct lwp *, struct exec_package *epp,
     87  1.10      fvdl 				      void *eh, char *itp, vaddr_t *pos);
     88  1.24      cube extern int ELFNAME2(netbsd,signature)(struct lwp *, struct exec_package *,
     89  1.10      fvdl 				      Elf_Ehdr *);
     90   1.1  jdolecek 
     91   1.1  jdolecek int
     92  1.23  christos ELFNAME2(netbsd32,probe)(struct lwp *l, struct exec_package *epp,
     93  1.10      fvdl 			 void *eh, char *itp, vaddr_t *pos)
     94   1.1  jdolecek {
     95   1.1  jdolecek 	int error;
     96   1.1  jdolecek 
     97  1.24      cube 	if ((error = ELFNAME2(netbsd,signature)(l, epp, eh)) != 0)
     98   1.1  jdolecek 		return error;
     99   1.1  jdolecek 
    100  1.23  christos 	return ELFNAME2(netbsd32,probe_noteless)(l, epp, eh, itp, pos);
    101   1.9       eeh }
    102   1.9       eeh 
    103   1.9       eeh int
    104  1.23  christos ELFNAME2(netbsd32,probe_noteless)(struct lwp *l, struct exec_package *epp,
    105  1.10      fvdl 				  void *eh, char *itp, vaddr_t *pos)
    106   1.9       eeh {
    107   1.9       eeh 	int error;
    108   1.9       eeh 
    109  1.21  drochner 	if (itp) {
    110   1.9       eeh 		/* Translate interpreter name if needed */
    111  1.23  christos 		if ((error = emul_find_interp(l,
    112  1.23  christos 		    epp->ep_esch->es_emul->e_path, itp)) != 0)
    113   1.1  jdolecek 			return error;
    114   1.1  jdolecek 	}
    115   1.1  jdolecek 	epp->ep_flags |= EXEC_32;
    116   1.4       eeh 	epp->ep_vm_minaddr = VM_MIN_ADDRESS;
    117   1.4       eeh 	epp->ep_vm_maxaddr = USRSTACK32;
    118  1.21  drochner #ifdef ELF_INTERP_NON_RELOCATABLE
    119  1.21  drochner 	*pos = ELF_LINK_ADDR;
    120  1.21  drochner #endif
    121   1.1  jdolecek 	return 0;
    122   1.1  jdolecek }
    123   1.1  jdolecek 
    124   1.1  jdolecek /* round up and down to page boundaries. */
    125   1.1  jdolecek #define	ELF_ROUND(a, b)		(((a) + (b) - 1) & ~((b) - 1))
    126   1.1  jdolecek #define	ELF_TRUNC(a, b)		((a) & ~((b) - 1))
    127   1.1  jdolecek 
    128   1.1  jdolecek /*
    129   1.1  jdolecek  * Copy arguments onto the stack in the normal way, but add some
    130   1.1  jdolecek  * extra information in case of dynamic binding.
    131   1.1  jdolecek  */
    132   1.5  christos int
    133  1.23  christos netbsd32_elf32_copyargs(struct lwp *l, struct exec_package *pack,
    134  1.11  christos     struct ps_strings *arginfo, char **stackp, void *argp)
    135   1.1  jdolecek {
    136   1.1  jdolecek 	size_t len;
    137   1.1  jdolecek 	AuxInfo ai[ELF_AUX_ENTRIES], *a;
    138   1.1  jdolecek 	struct elf_args *ap;
    139   1.6       eeh 	int error;
    140   1.1  jdolecek 
    141  1.23  christos 	if ((error = netbsd32_copyargs(l, pack, arginfo, stackp, argp)) != 0)
    142   1.5  christos 		return error;
    143   1.1  jdolecek 
    144   1.1  jdolecek 	a = ai;
    145   1.1  jdolecek 
    146   1.1  jdolecek 	/*
    147   1.1  jdolecek 	 * Push extra arguments on the stack needed by dynamically
    148   1.1  jdolecek 	 * linked binaries
    149   1.1  jdolecek 	 */
    150   1.1  jdolecek 	if ((ap = (struct elf_args *)pack->ep_emul_arg)) {
    151   1.1  jdolecek 
    152   1.1  jdolecek 		a->a_type = AT_PHDR;
    153   1.1  jdolecek 		a->a_v = ap->arg_phaddr;
    154   1.1  jdolecek 		a++;
    155   1.1  jdolecek 
    156   1.1  jdolecek 		a->a_type = AT_PHENT;
    157   1.1  jdolecek 		a->a_v = ap->arg_phentsize;
    158   1.1  jdolecek 		a++;
    159   1.1  jdolecek 
    160   1.1  jdolecek 		a->a_type = AT_PHNUM;
    161   1.1  jdolecek 		a->a_v = ap->arg_phnum;
    162   1.1  jdolecek 		a++;
    163   1.1  jdolecek 
    164   1.1  jdolecek 		a->a_type = AT_PAGESZ;
    165  1.16   thorpej 		a->a_v = PAGE_SIZE;
    166   1.1  jdolecek 		a++;
    167   1.1  jdolecek 
    168   1.1  jdolecek 		a->a_type = AT_BASE;
    169   1.1  jdolecek 		a->a_v = ap->arg_interp;
    170   1.1  jdolecek 		a++;
    171   1.1  jdolecek 
    172   1.1  jdolecek 		a->a_type = AT_FLAGS;
    173   1.1  jdolecek 		a->a_v = 0;
    174   1.1  jdolecek 		a++;
    175   1.1  jdolecek 
    176   1.1  jdolecek 		a->a_type = AT_ENTRY;
    177   1.1  jdolecek 		a->a_v = ap->arg_entry;
    178  1.11  christos 		a++;
    179  1.11  christos 
    180  1.12  christos 		a->a_type = AT_EUID;
    181  1.26        ad 		a->a_v = kauth_cred_geteuid(l->l_cred);
    182  1.11  christos 		a++;
    183  1.11  christos 
    184  1.12  christos 		a->a_type = AT_RUID;
    185  1.26        ad 		a->a_v = kauth_cred_getuid(l->l_cred);
    186  1.11  christos 		a++;
    187  1.11  christos 
    188  1.12  christos 		a->a_type = AT_EGID;
    189  1.26        ad 		a->a_v = kauth_cred_getegid(l->l_cred);
    190  1.11  christos 		a++;
    191  1.11  christos 
    192  1.12  christos 		a->a_type = AT_RGID;
    193  1.26        ad 		a->a_v = kauth_cred_getgid(l->l_cred);
    194   1.1  jdolecek 		a++;
    195   1.1  jdolecek 
    196   1.1  jdolecek 		free((char *)ap, M_TEMP);
    197   1.1  jdolecek 		pack->ep_emul_arg = NULL;
    198   1.1  jdolecek 	}
    199   1.1  jdolecek 
    200   1.1  jdolecek 	a->a_type = AT_NULL;
    201   1.1  jdolecek 	a->a_v = 0;
    202   1.1  jdolecek 	a++;
    203   1.1  jdolecek 
    204   1.1  jdolecek 	len = (a - ai) * sizeof(AuxInfo);
    205   1.5  christos 	if ((error = copyout(ai, *stackp, len)) != 0)
    206   1.5  christos 		return error;
    207   1.5  christos 	*stackp += len;
    208   1.1  jdolecek 
    209   1.5  christos 	return 0;
    210   1.1  jdolecek }
    211