netbsd32_exec_elf32.c revision 1.9
1 /* $NetBSD: netbsd32_exec_elf32.c,v 1.9 2002/05/31 00:49:42 eeh 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 1.9 2002/05/31 00:49:42 eeh 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 73 if ((error = ELFNAME2(netbsd,signature)(p, epp, eh)) != 0) 74 return error; 75 76 return ELFNAME2(netbsd32,probe_noteless)(p, epp, eh, itp, pos); 77 } 78 79 int 80 ELFNAME2(netbsd32,probe_noteless)(p, epp, eh, itp, pos) 81 struct proc *p; 82 struct exec_package *epp; 83 void *eh; 84 char *itp; 85 vaddr_t *pos; 86 { 87 int error; 88 size_t i; 89 const char *bp; 90 91 if (itp[0]) { 92 /* Translate interpreter name if needed */ 93 if ((error = emul_find(p, NULL, epp->ep_esch->es_emul->e_path, 94 itp, &bp, 0)) != 0) { 95 /* 96 * See if we're chroot-ed. Since it's the same OS, 97 * there really shouldn't be any device node issues 98 * so we might as well support chroot-ing to a 32-bit 99 * installation. 100 */ 101 if ((error = emul_find(p, NULL, "/", itp, &bp, 0)) 102 != 0) { 103 return error; 104 } 105 } 106 if ((error = copystr(bp, itp, MAXPATHLEN, &i)) != 0) 107 return error; 108 free((void *)bp, M_TEMP); 109 } 110 epp->ep_flags |= EXEC_32; 111 epp->ep_vm_minaddr = VM_MIN_ADDRESS; 112 epp->ep_vm_maxaddr = USRSTACK32; 113 *pos = ELFDEFNNAME(NO_ADDR); 114 return 0; 115 } 116 117 /* round up and down to page boundaries. */ 118 #define ELF_ROUND(a, b) (((a) + (b) - 1) & ~((b) - 1)) 119 #define ELF_TRUNC(a, b) ((a) & ~((b) - 1)) 120 121 /* 122 * Copy arguments onto the stack in the normal way, but add some 123 * extra information in case of dynamic binding. 124 */ 125 int 126 netbsd32_elf32_copyargs(pack, arginfo, stackp, argp) 127 struct exec_package *pack; 128 struct ps_strings *arginfo; 129 char **stackp; 130 void *argp; 131 { 132 size_t len; 133 AuxInfo ai[ELF_AUX_ENTRIES], *a; 134 struct elf_args *ap; 135 int error; 136 137 if ((error = netbsd32_copyargs(pack, arginfo, stackp, argp)) != 0) 138 return error; 139 140 a = ai; 141 142 /* 143 * Push extra arguments on the stack needed by dynamically 144 * linked binaries 145 */ 146 if ((ap = (struct elf_args *)pack->ep_emul_arg)) { 147 148 a->a_type = AT_PHDR; 149 a->a_v = ap->arg_phaddr; 150 a++; 151 152 a->a_type = AT_PHENT; 153 a->a_v = ap->arg_phentsize; 154 a++; 155 156 a->a_type = AT_PHNUM; 157 a->a_v = ap->arg_phnum; 158 a++; 159 160 a->a_type = AT_PAGESZ; 161 a->a_v = NBPG; 162 a++; 163 164 a->a_type = AT_BASE; 165 a->a_v = ap->arg_interp; 166 a++; 167 168 a->a_type = AT_FLAGS; 169 a->a_v = 0; 170 a++; 171 172 a->a_type = AT_ENTRY; 173 a->a_v = ap->arg_entry; 174 a++; 175 176 free((char *)ap, M_TEMP); 177 pack->ep_emul_arg = NULL; 178 } 179 180 a->a_type = AT_NULL; 181 a->a_v = 0; 182 a++; 183 184 len = (a - ai) * sizeof(AuxInfo); 185 if ((error = copyout(ai, *stackp, len)) != 0) 186 return error; 187 *stackp += len; 188 189 return 0; 190 } 191
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