| 1 | /* $NetBSD: netbsd32_exec_elf32.c,v 1.40 2016/08/06 15:13:13 maxv 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 | * |
| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 27 | */ |
| 28 | |
| 29 | /* |
| 30 | * Copyright (c) 1993, 1994 Christopher G. Demetriou |
| 31 | * All rights reserved. |
| 32 | * |
| 33 | * Redistribution and use in source and binary forms, with or without |
| 34 | * modification, are permitted provided that the following conditions |
| 35 | * are met: |
| 36 | * 1. Redistributions of source code must retain the above copyright |
| 37 | * notice, this list of conditions and the following disclaimer. |
| 38 | * 2. Redistributions in binary form must reproduce the above copyright |
| 39 | * notice, this list of conditions and the following disclaimer in the |
| 40 | * documentation and/or other materials provided with the distribution. |
| 41 | * 3. All advertising materials mentioning features or use of this software |
| 42 | * must display the following acknowledgement: |
| 43 | * This product includes software developed by Christopher G. Demetriou. |
| 44 | * 4. The name of the author may not be used to endorse or promote products |
| 45 | * derived from this software without specific prior written permission |
| 46 | * |
| 47 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| 48 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| 49 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| 50 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| 51 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| 52 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 53 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 54 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 55 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| 56 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 57 | */ |
| 58 | |
| 59 | #include <sys/cdefs.h> |
| 60 | __KERNEL_RCSID(0, "$NetBSD: netbsd32_exec_elf32.c,v 1.40 2016/08/06 15:13:13 maxv Exp $" ); |
| 61 | |
| 62 | #define ELFSIZE 32 |
| 63 | |
| 64 | #include <sys/param.h> |
| 65 | #include <sys/systm.h> |
| 66 | #include <sys/proc.h> |
| 67 | #include <sys/vnode.h> |
| 68 | #include <sys/exec.h> |
| 69 | #include <sys/exec_elf.h> |
| 70 | #include <sys/resourcevar.h> |
| 71 | #include <sys/signal.h> |
| 72 | #include <sys/signalvar.h> |
| 73 | #include <sys/kauth.h> |
| 74 | #include <sys/namei.h> |
| 75 | |
| 76 | #include <compat/common/compat_util.h> |
| 77 | |
| 78 | #include <compat/netbsd32/netbsd32.h> |
| 79 | #include <compat/netbsd32/netbsd32_exec.h> |
| 80 | |
| 81 | #include <machine/netbsd32_machdep.h> |
| 82 | |
| 83 | int ELFNAME2(netbsd32,probe_noteless)(struct lwp *, struct exec_package *epp, |
| 84 | void *eh, char *itp, vaddr_t *pos); |
| 85 | extern int ELFNAME2(netbsd,signature)(struct lwp *, struct exec_package *, |
| 86 | Elf_Ehdr *); |
| 87 | |
| 88 | int |
| 89 | ELFNAME2(netbsd32,probe)(struct lwp *l, struct exec_package *epp, |
| 90 | void *eh, char *itp, vaddr_t *pos) |
| 91 | { |
| 92 | int error; |
| 93 | |
| 94 | if ((error = ELFNAME2(netbsd,signature)(l, epp, eh)) != 0) |
| 95 | return error; |
| 96 | |
| 97 | #ifdef ELF_MD_PROBE_FUNC |
| 98 | if ((error = ELF_MD_PROBE_FUNC(l, epp, eh, itp, pos)) != 0) |
| 99 | return error; |
| 100 | #elif defined(ELF_INTERP_NON_RELOCATABLE) |
| 101 | *pos = ELF_LINK_ADDR; |
| 102 | #endif |
| 103 | |
| 104 | return ELFNAME2(netbsd32,probe_noteless)(l, epp, eh, itp, pos); |
| 105 | } |
| 106 | |
| 107 | int |
| 108 | ELFNAME2(netbsd32,probe_noteless)(struct lwp *l, struct exec_package *epp, |
| 109 | void *eh, char *itp, vaddr_t *pos) |
| 110 | { |
| 111 | if (itp && epp->ep_interp == NULL) { |
| 112 | extern const char machine32[]; |
| 113 | (void)compat_elf_check_interp(epp, itp, machine32); |
| 114 | } |
| 115 | #ifdef _LP64 |
| 116 | epp->ep_flags |= EXEC_32 | EXEC_FORCEAUX; |
| 117 | #endif |
| 118 | epp->ep_vm_minaddr = exec_vm_minaddr(VM_MIN_ADDRESS); |
| 119 | epp->ep_vm_maxaddr = USRSTACK32; |
| 120 | #ifdef ELF_INTERP_NON_RELOCATABLE |
| 121 | *pos = ELF_LINK_ADDR; |
| 122 | #endif |
| 123 | return 0; |
| 124 | } |
| 125 | |
| 126 | /* |
| 127 | * Copy arguments onto the stack in the normal way, but add some |
| 128 | * extra information in case of dynamic binding. |
| 129 | */ |
| 130 | int |
| 131 | netbsd32_elf32_copyargs(struct lwp *l, struct exec_package *pack, |
| 132 | struct ps_strings *arginfo, char **stackp, void *argp) |
| 133 | { |
| 134 | size_t len; |
| 135 | AuxInfo ai[ELF_AUX_ENTRIES], *a; |
| 136 | struct elf_args *ap; |
| 137 | int error; |
| 138 | |
| 139 | if ((error = netbsd32_copyargs(l, pack, arginfo, stackp, argp)) != 0) |
| 140 | return error; |
| 141 | |
| 142 | a = ai; |
| 143 | |
| 144 | memset(ai, 0, sizeof(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 | exec_free_emul_arg(pack); |
| 197 | } |
| 198 | |
| 199 | a->a_type = AT_NULL; |
| 200 | a->a_v = 0; |
| 201 | a++; |
| 202 | |
| 203 | len = (a - ai) * sizeof(AuxInfo); |
| 204 | if ((error = copyout(ai, *stackp, len)) != 0) |
| 205 | return error; |
| 206 | *stackp += len; |
| 207 | |
| 208 | return 0; |
| 209 | } |
| 210 | |