1 /* $NetBSD: netbsd32_exec_elf32.c,v 1.7 2001/08/25 15:06:03 mrg 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 #define ELFSIZE 32 36 37 #include <sys/param.h> 38 #include <sys/systm.h> 39 #include <sys/proc.h> 40 #include <sys/malloc.h> 41 #include <sys/vnode.h> 42 #include <sys/exec.h> 43 #include <sys/exec_elf.h> 44 #include <sys/resourcevar.h> 45 #include <sys/signal.h> 46 #include <sys/signalvar.h> 47 48 #include <compat/netbsd32/netbsd32.h> 49 #include <compat/netbsd32/netbsd32_exec.h> 50 51 #include <machine/frame.h> 52 #include <machine/netbsd32_machdep.h> 53 54 int netbsd32_copyinargs __P((struct exec_package *, struct ps_strings *, 55 void *, size_t, const void *, const void *)); 56 57 extern int ELFNAME2(netbsd,signature) __P((struct proc *, struct exec_package *, 58 Elf_Ehdr *)); 59 60 int 61 ELFNAME2(netbsd32,probe)(p, epp, eh, itp, pos) 62 struct proc *p; 63 struct exec_package *epp; 64 void *eh; 65 char *itp; 66 vaddr_t *pos; 67 { 68 int error; 69 size_t i; 70 const char *bp; 71 72 if ((error = ELFNAME2(netbsd,signature)(p, epp, eh)) != 0) 73 return error; 74 75 if (itp[0]) { 76 if ((error = emul_find(p, NULL, epp->ep_esch->es_emul->e_path, 77 itp, &bp, 0)) && 78 (error = emul_find(p, NULL, "", itp, &bp, 0))) 79 return error; 80 if ((error = copystr(bp, itp, MAXPATHLEN, &i)) != 0) 81 return error; 82 free((void *)bp, M_TEMP); 83 } 84 epp->ep_flags |= EXEC_32; 85 epp->ep_vm_minaddr = VM_MIN_ADDRESS; 86 epp->ep_vm_maxaddr = USRSTACK32; 87 *pos = ELFDEFNNAME(NO_ADDR); 88 return 0; 89 } 90 91 /* round up and down to page boundaries. */ 92 #define ELF_ROUND(a, b) (((a) + (b) - 1) & ~((b) - 1)) 93 #define ELF_TRUNC(a, b) ((a) & ~((b) - 1)) 94 95 /* 96 * Copy arguments onto the stack in the normal way, but add some 97 * extra information in case of dynamic binding. 98 */ 99 int 100 netbsd32_elf32_copyargs(pack, arginfo, stackp, argp) 101 struct exec_package *pack; 102 struct ps_strings *arginfo; 103 char **stackp; 104 void *argp; 105 { 106 size_t len; 107 AuxInfo ai[ELF_AUX_ENTRIES], *a; 108 struct elf_args *ap; 109 int error; 110 111 if ((error = netbsd32_copyargs(pack, arginfo, stackp, argp)) != 0) 112 return error; 113 114 a = ai; 115 116 /* 117 * Push extra arguments on the stack needed by dynamically 118 * linked binaries 119 */ 120 if ((ap = (struct elf_args *)pack->ep_emul_arg)) { 121 122 a->a_type = AT_PHDR; 123 a->a_v = ap->arg_phaddr; 124 a++; 125 126 a->a_type = AT_PHENT; 127 a->a_v = ap->arg_phentsize; 128 a++; 129 130 a->a_type = AT_PHNUM; 131 a->a_v = ap->arg_phnum; 132 a++; 133 134 a->a_type = AT_PAGESZ; 135 a->a_v = NBPG; 136 a++; 137 138 a->a_type = AT_BASE; 139 a->a_v = ap->arg_interp; 140 a++; 141 142 a->a_type = AT_FLAGS; 143 a->a_v = 0; 144 a++; 145 146 a->a_type = AT_ENTRY; 147 a->a_v = ap->arg_entry; 148 a++; 149 150 free((char *)ap, M_TEMP); 151 pack->ep_emul_arg = NULL; 152 } 153 154 a->a_type = AT_NULL; 155 a->a_v = 0; 156 a++; 157 158 len = (a - ai) * sizeof(AuxInfo); 159 if ((error = copyout(ai, *stackp, len)) != 0) 160 return error; 161 *stackp += len; 162 163 return 0; 164 } 165