1 /* $NetBSD: netbsd32_exec_elf32.c,v 1.10 2002/06/01 15:10:43 fvdl 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 1.10 2002/06/01 15:10:43 fvdl 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(struct exec_package *, struct ps_strings *, 58 void *, size_t, const void *, const void *); 59 int ELFNAME2(netbsd32,probe_noteless)(struct proc *, struct exec_package *epp, 60 void *eh, char *itp, vaddr_t *pos); 61 extern int ELFNAME2(netbsd,signature)(struct proc *, struct exec_package *, 62 Elf_Ehdr *); 63 64 int 65 ELFNAME2(netbsd32,probe)(struct proc *p, struct exec_package *epp, 66 void *eh, char *itp, vaddr_t *pos) 67 { 68 int error; 69 70 if ((error = ELFNAME2(netbsd,signature)(p, epp, eh)) != 0) 71 return error; 72 73 return ELFNAME2(netbsd32,probe_noteless)(p, epp, eh, itp, pos); 74 } 75 76 int 77 ELFNAME2(netbsd32,probe_noteless)(struct proc *p, struct exec_package *epp, 78 void *eh, char *itp, vaddr_t *pos) 79 { 80 int error; 81 size_t i; 82 const char *bp; 83 84 if (itp[0]) { 85 /* Translate interpreter name if needed */ 86 if ((error = emul_find(p, NULL, epp->ep_esch->es_emul->e_path, 87 itp, &bp, 0)) != 0) { 88 /* 89 * See if we're chroot-ed. Since it's the same OS, 90 * there really shouldn't be any device node issues 91 * so we might as well support chroot-ing to a 32-bit 92 * installation. 93 */ 94 if ((error = emul_find(p, NULL, "/", itp, &bp, 0)) 95 != 0) { 96 return error; 97 } 98 } 99 if ((error = copystr(bp, itp, MAXPATHLEN, &i)) != 0) 100 return error; 101 free((void *)bp, M_TEMP); 102 } 103 epp->ep_flags |= EXEC_32; 104 epp->ep_vm_minaddr = VM_MIN_ADDRESS; 105 epp->ep_vm_maxaddr = USRSTACK32; 106 *pos = ELFDEFNNAME(NO_ADDR); 107 return 0; 108 } 109 110 /* round up and down to page boundaries. */ 111 #define ELF_ROUND(a, b) (((a) + (b) - 1) & ~((b) - 1)) 112 #define ELF_TRUNC(a, b) ((a) & ~((b) - 1)) 113 114 /* 115 * Copy arguments onto the stack in the normal way, but add some 116 * extra information in case of dynamic binding. 117 */ 118 int 119 netbsd32_elf32_copyargs(struct exec_package *pack, struct ps_strings *arginfo, 120 char **stackp, void *argp) 121 { 122 size_t len; 123 AuxInfo ai[ELF_AUX_ENTRIES], *a; 124 struct elf_args *ap; 125 int error; 126 127 if ((error = netbsd32_copyargs(pack, arginfo, stackp, argp)) != 0) 128 return error; 129 130 a = ai; 131 132 /* 133 * Push extra arguments on the stack needed by dynamically 134 * linked binaries 135 */ 136 if ((ap = (struct elf_args *)pack->ep_emul_arg)) { 137 138 a->a_type = AT_PHDR; 139 a->a_v = ap->arg_phaddr; 140 a++; 141 142 a->a_type = AT_PHENT; 143 a->a_v = ap->arg_phentsize; 144 a++; 145 146 a->a_type = AT_PHNUM; 147 a->a_v = ap->arg_phnum; 148 a++; 149 150 a->a_type = AT_PAGESZ; 151 a->a_v = NBPG; 152 a++; 153 154 a->a_type = AT_BASE; 155 a->a_v = ap->arg_interp; 156 a++; 157 158 a->a_type = AT_FLAGS; 159 a->a_v = 0; 160 a++; 161 162 a->a_type = AT_ENTRY; 163 a->a_v = ap->arg_entry; 164 a++; 165 166 free((char *)ap, M_TEMP); 167 pack->ep_emul_arg = NULL; 168 } 169 170 a->a_type = AT_NULL; 171 a->a_v = 0; 172 a++; 173 174 len = (a - ai) * sizeof(AuxInfo); 175 if ((error = copyout(ai, *stackp, len)) != 0) 176 return error; 177 *stackp += len; 178 179 return 0; 180 } 181