netbsd32_exec_elf32.c revision 1.23
1 /* $NetBSD: netbsd32_exec_elf32.c,v 1.23 2005/12/11 12:20:22 christos 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 1.23 2005/12/11 12:20:22 christos 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 77 #include <compat/netbsd32/netbsd32.h> 78 #include <compat/netbsd32/netbsd32_exec.h> 79 80 #include <machine/frame.h> 81 #include <machine/netbsd32_machdep.h> 82 83 int netbsd32_copyinargs(struct exec_package *, struct ps_strings *, 84 void *, size_t, const void *, const void *); 85 int ELFNAME2(netbsd32,probe_noteless)(struct lwp *, struct exec_package *epp, 86 void *eh, char *itp, vaddr_t *pos); 87 extern int ELFNAME2(netbsd,signature)(struct proc *, struct exec_package *, 88 Elf_Ehdr *); 89 90 int 91 ELFNAME2(netbsd32,probe)(struct lwp *l, struct exec_package *epp, 92 void *eh, char *itp, vaddr_t *pos) 93 { 94 int error; 95 96 if ((error = ELFNAME2(netbsd,signature)(l->l_proc, epp, eh)) != 0) 97 return error; 98 99 return ELFNAME2(netbsd32,probe_noteless)(l, epp, eh, itp, pos); 100 } 101 102 int 103 ELFNAME2(netbsd32,probe_noteless)(struct lwp *l, struct exec_package *epp, 104 void *eh, char *itp, vaddr_t *pos) 105 { 106 int error; 107 108 if (itp) { 109 /* Translate interpreter name if needed */ 110 if ((error = emul_find_interp(l, 111 epp->ep_esch->es_emul->e_path, itp)) != 0) 112 return error; 113 } 114 epp->ep_flags |= EXEC_32; 115 epp->ep_vm_minaddr = VM_MIN_ADDRESS; 116 epp->ep_vm_maxaddr = USRSTACK32; 117 #ifdef ELF_INTERP_NON_RELOCATABLE 118 *pos = ELF_LINK_ADDR; 119 #endif 120 return 0; 121 } 122 123 /* round up and down to page boundaries. */ 124 #define ELF_ROUND(a, b) (((a) + (b) - 1) & ~((b) - 1)) 125 #define ELF_TRUNC(a, b) ((a) & ~((b) - 1)) 126 127 /* 128 * Copy arguments onto the stack in the normal way, but add some 129 * extra information in case of dynamic binding. 130 */ 131 int 132 netbsd32_elf32_copyargs(struct lwp *l, struct exec_package *pack, 133 struct ps_strings *arginfo, char **stackp, void *argp) 134 { 135 size_t len; 136 AuxInfo ai[ELF_AUX_ENTRIES], *a; 137 struct elf_args *ap; 138 struct proc *p; 139 int error; 140 141 p = l->l_proc; 142 143 if ((error = netbsd32_copyargs(l, pack, arginfo, stackp, argp)) != 0) 144 return error; 145 146 a = ai; 147 148 /* 149 * Push extra arguments on the stack needed by dynamically 150 * linked binaries 151 */ 152 if ((ap = (struct elf_args *)pack->ep_emul_arg)) { 153 154 a->a_type = AT_PHDR; 155 a->a_v = ap->arg_phaddr; 156 a++; 157 158 a->a_type = AT_PHENT; 159 a->a_v = ap->arg_phentsize; 160 a++; 161 162 a->a_type = AT_PHNUM; 163 a->a_v = ap->arg_phnum; 164 a++; 165 166 a->a_type = AT_PAGESZ; 167 a->a_v = PAGE_SIZE; 168 a++; 169 170 a->a_type = AT_BASE; 171 a->a_v = ap->arg_interp; 172 a++; 173 174 a->a_type = AT_FLAGS; 175 a->a_v = 0; 176 a++; 177 178 a->a_type = AT_ENTRY; 179 a->a_v = ap->arg_entry; 180 a++; 181 182 a->a_type = AT_EUID; 183 a->a_v = p->p_ucred->cr_uid; 184 a++; 185 186 a->a_type = AT_RUID; 187 a->a_v = p->p_cred->p_ruid; 188 a++; 189 190 a->a_type = AT_EGID; 191 a->a_v = p->p_ucred->cr_gid; 192 a++; 193 194 a->a_type = AT_RGID; 195 a->a_v = p->p_cred->p_rgid; 196 a++; 197 198 free((char *)ap, M_TEMP); 199 pack->ep_emul_arg = NULL; 200 } 201 202 a->a_type = AT_NULL; 203 a->a_v = 0; 204 a++; 205 206 len = (a - ai) * sizeof(AuxInfo); 207 if ((error = copyout(ai, *stackp, len)) != 0) 208 return error; 209 *stackp += len; 210 211 return 0; 212 } 213
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