netbsd32_exec_elf32.c revision 1.26
1 /* $NetBSD: netbsd32_exec_elf32.c,v 1.26 2006/07/23 22:06:09 ad 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 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. The name of the author may not be used to endorse or promote products 17 * derived from this software without specific prior written permission 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 20 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 21 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 22 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 23 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 24 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 28 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31 /* 32 * Copyright (c) 1993, 1994 Christopher G. Demetriou 33 * All rights reserved. 34 * 35 * Redistribution and use in source and binary forms, with or without 36 * modification, are permitted provided that the following conditions 37 * are met: 38 * 1. Redistributions of source code must retain the above copyright 39 * notice, this list of conditions and the following disclaimer. 40 * 2. Redistributions in binary form must reproduce the above copyright 41 * notice, this list of conditions and the following disclaimer in the 42 * documentation and/or other materials provided with the distribution. 43 * 3. All advertising materials mentioning features or use of this software 44 * must display the following acknowledgement: 45 * This product includes software developed by Christopher G. Demetriou. 46 * 4. The name of the author may not be used to endorse or promote products 47 * derived from this software without specific prior written permission 48 * 49 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 50 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 51 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 52 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 53 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 54 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 55 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 56 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 57 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 58 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 59 */ 60 61 #include <sys/cdefs.h> 62 __KERNEL_RCSID(0, "$NetBSD: netbsd32_exec_elf32.c,v 1.26 2006/07/23 22:06:09 ad Exp $"); 63 64 #define ELFSIZE 32 65 66 #include <sys/param.h> 67 #include <sys/systm.h> 68 #include <sys/proc.h> 69 #include <sys/malloc.h> 70 #include <sys/vnode.h> 71 #include <sys/exec.h> 72 #include <sys/exec_elf.h> 73 #include <sys/resourcevar.h> 74 #include <sys/signal.h> 75 #include <sys/signalvar.h> 76 #include <sys/kauth.h> 77 78 #include <compat/netbsd32/netbsd32.h> 79 #include <compat/netbsd32/netbsd32_exec.h> 80 81 #include <machine/frame.h> 82 #include <machine/netbsd32_machdep.h> 83 84 int netbsd32_copyinargs(struct exec_package *, struct ps_strings *, 85 void *, size_t, const void *, const void *); 86 int ELFNAME2(netbsd32,probe_noteless)(struct lwp *, struct exec_package *epp, 87 void *eh, char *itp, vaddr_t *pos); 88 extern int ELFNAME2(netbsd,signature)(struct lwp *, struct exec_package *, 89 Elf_Ehdr *); 90 91 int 92 ELFNAME2(netbsd32,probe)(struct lwp *l, struct exec_package *epp, 93 void *eh, char *itp, vaddr_t *pos) 94 { 95 int error; 96 97 if ((error = ELFNAME2(netbsd,signature)(l, epp, eh)) != 0) 98 return error; 99 100 return ELFNAME2(netbsd32,probe_noteless)(l, epp, eh, itp, pos); 101 } 102 103 int 104 ELFNAME2(netbsd32,probe_noteless)(struct lwp *l, struct exec_package *epp, 105 void *eh, char *itp, vaddr_t *pos) 106 { 107 int error; 108 109 if (itp) { 110 /* Translate interpreter name if needed */ 111 if ((error = emul_find_interp(l, 112 epp->ep_esch->es_emul->e_path, itp)) != 0) 113 return error; 114 } 115 epp->ep_flags |= EXEC_32; 116 epp->ep_vm_minaddr = VM_MIN_ADDRESS; 117 epp->ep_vm_maxaddr = USRSTACK32; 118 #ifdef ELF_INTERP_NON_RELOCATABLE 119 *pos = ELF_LINK_ADDR; 120 #endif 121 return 0; 122 } 123 124 /* round up and down to page boundaries. */ 125 #define ELF_ROUND(a, b) (((a) + (b) - 1) & ~((b) - 1)) 126 #define ELF_TRUNC(a, b) ((a) & ~((b) - 1)) 127 128 /* 129 * Copy arguments onto the stack in the normal way, but add some 130 * extra information in case of dynamic binding. 131 */ 132 int 133 netbsd32_elf32_copyargs(struct lwp *l, struct exec_package *pack, 134 struct ps_strings *arginfo, char **stackp, void *argp) 135 { 136 size_t len; 137 AuxInfo ai[ELF_AUX_ENTRIES], *a; 138 struct elf_args *ap; 139 int error; 140 141 if ((error = netbsd32_copyargs(l, pack, arginfo, stackp, argp)) != 0) 142 return error; 143 144 a = ai; 145 146 /* 147 * Push extra arguments on the stack needed by dynamically 148 * linked binaries 149 */ 150 if ((ap = (struct elf_args *)pack->ep_emul_arg)) { 151 152 a->a_type = AT_PHDR; 153 a->a_v = ap->arg_phaddr; 154 a++; 155 156 a->a_type = AT_PHENT; 157 a->a_v = ap->arg_phentsize; 158 a++; 159 160 a->a_type = AT_PHNUM; 161 a->a_v = ap->arg_phnum; 162 a++; 163 164 a->a_type = AT_PAGESZ; 165 a->a_v = PAGE_SIZE; 166 a++; 167 168 a->a_type = AT_BASE; 169 a->a_v = ap->arg_interp; 170 a++; 171 172 a->a_type = AT_FLAGS; 173 a->a_v = 0; 174 a++; 175 176 a->a_type = AT_ENTRY; 177 a->a_v = ap->arg_entry; 178 a++; 179 180 a->a_type = AT_EUID; 181 a->a_v = kauth_cred_geteuid(l->l_cred); 182 a++; 183 184 a->a_type = AT_RUID; 185 a->a_v = kauth_cred_getuid(l->l_cred); 186 a++; 187 188 a->a_type = AT_EGID; 189 a->a_v = kauth_cred_getegid(l->l_cred); 190 a++; 191 192 a->a_type = AT_RGID; 193 a->a_v = kauth_cred_getgid(l->l_cred); 194 a++; 195 196 free((char *)ap, M_TEMP); 197 pack->ep_emul_arg = NULL; 198 } 199 200 a->a_type = AT_NULL; 201 a->a_v = 0; 202 a++; 203 204 len = (a - ai) * sizeof(AuxInfo); 205 if ((error = copyout(ai, *stackp, len)) != 0) 206 return error; 207 *stackp += len; 208 209 return 0; 210 } 211
Indexes created Tue Sep 23 07:09:52 GMT 2025