1 /* $NetBSD: netbsd32_exec_elf32.c,v 1.8 2001/11/13 02:09:05 lukem Exp $ */ 2 /* from: NetBSD: exec_aout.c,v 1.15 1996/09/26 23:34:46 cgd Exp */ 3 4 /* 5 * Copyright (c) 1998, 2001 Matthew R. Green. 6 * Copyright (c) 1993, 1994 Christopher G. Demetriou 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed by Christopher G. Demetriou. 20 * 4. The name of the author may not be used to endorse or promote products 21 * derived from this software without specific prior written permission 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 24 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 25 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 26 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 27 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 28 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 29 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 30 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 31 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 32 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 33 */ 34 35 #include <sys/cdefs.h> 36 __KERNEL_RCSID(0, "$NetBSD: netbsd32_exec_elf32.c,v 1.8 2001/11/13 02:09:05 lukem Exp $"); 37 38 #define ELFSIZE 32 39 40 #include <sys/param.h> 41 #include <sys/systm.h> 42 #include <sys/proc.h> 43 #include <sys/malloc.h> 44 #include <sys/vnode.h> 45 #include <sys/exec.h> 46 #include <sys/exec_elf.h> 47 #include <sys/resourcevar.h> 48 #include <sys/signal.h> 49 #include <sys/signalvar.h> 50 51 #include <compat/netbsd32/netbsd32.h> 52 #include <compat/netbsd32/netbsd32_exec.h> 53 54 #include <machine/frame.h> 55 #include <machine/netbsd32_machdep.h> 56 57 int netbsd32_copyinargs __P((struct exec_package *, struct ps_strings *, 58 void *, size_t, const void *, const void *)); 59 60 extern int ELFNAME2(netbsd,signature) __P((struct proc *, struct exec_package *, 61 Elf_Ehdr *)); 62 63 int 64 ELFNAME2(netbsd32,probe)(p, epp, eh, itp, pos) 65 struct proc *p; 66 struct exec_package *epp; 67 void *eh; 68 char *itp; 69 vaddr_t *pos; 70 { 71 int error; 72 size_t i; 73 const char *bp; 74 75 if ((error = ELFNAME2(netbsd,signature)(p, epp, eh)) != 0) 76 return error; 77 78 if (itp[0]) { 79 if ((error = emul_find(p, NULL, epp->ep_esch->es_emul->e_path, 80 itp, &bp, 0)) && 81 (error = emul_find(p, NULL, "", itp, &bp, 0))) 82 return error; 83 if ((error = copystr(bp, itp, MAXPATHLEN, &i)) != 0) 84 return error; 85 free((void *)bp, M_TEMP); 86 } 87 epp->ep_flags |= EXEC_32; 88 epp->ep_vm_minaddr = VM_MIN_ADDRESS; 89 epp->ep_vm_maxaddr = USRSTACK32; 90 *pos = ELFDEFNNAME(NO_ADDR); 91 return 0; 92 } 93 94 /* round up and down to page boundaries. */ 95 #define ELF_ROUND(a, b) (((a) + (b) - 1) & ~((b) - 1)) 96 #define ELF_TRUNC(a, b) ((a) & ~((b) - 1)) 97 98 /* 99 * Copy arguments onto the stack in the normal way, but add some 100 * extra information in case of dynamic binding. 101 */ 102 int 103 netbsd32_elf32_copyargs(pack, arginfo, stackp, argp) 104 struct exec_package *pack; 105 struct ps_strings *arginfo; 106 char **stackp; 107 void *argp; 108 { 109 size_t len; 110 AuxInfo ai[ELF_AUX_ENTRIES], *a; 111 struct elf_args *ap; 112 int error; 113 114 if ((error = netbsd32_copyargs(pack, arginfo, stackp, argp)) != 0) 115 return error; 116 117 a = ai; 118 119 /* 120 * Push extra arguments on the stack needed by dynamically 121 * linked binaries 122 */ 123 if ((ap = (struct elf_args *)pack->ep_emul_arg)) { 124 125 a->a_type = AT_PHDR; 126 a->a_v = ap->arg_phaddr; 127 a++; 128 129 a->a_type = AT_PHENT; 130 a->a_v = ap->arg_phentsize; 131 a++; 132 133 a->a_type = AT_PHNUM; 134 a->a_v = ap->arg_phnum; 135 a++; 136 137 a->a_type = AT_PAGESZ; 138 a->a_v = NBPG; 139 a++; 140 141 a->a_type = AT_BASE; 142 a->a_v = ap->arg_interp; 143 a++; 144 145 a->a_type = AT_FLAGS; 146 a->a_v = 0; 147 a++; 148 149 a->a_type = AT_ENTRY; 150 a->a_v = ap->arg_entry; 151 a++; 152 153 free((char *)ap, M_TEMP); 154 pack->ep_emul_arg = NULL; 155 } 156 157 a->a_type = AT_NULL; 158 a->a_v = 0; 159 a++; 160 161 len = (a - ai) * sizeof(AuxInfo); 162 if ((error = copyout(ai, *stackp, len)) != 0) 163 return error; 164 *stackp += len; 165 166 return 0; 167 } 168