1 /* $NetBSD: netbsd32_exec_elf32.c,v 1.15 2002/12/01 11:02:11 agc 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 1.15 2002/12/01 11:02:11 agc 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 82 if (itp[0]) { 83 /* Translate interpreter name if needed */ 84 if ((error = emul_find_interp(p, epp->ep_esch->es_emul->e_path, 85 itp)) != 0) 86 return error; 87 } 88 epp->ep_flags |= EXEC_32; 89 epp->ep_vm_minaddr = VM_MIN_ADDRESS; 90 epp->ep_vm_maxaddr = USRSTACK32; 91 *pos = ELFDEFNNAME(NO_ADDR); 92 return 0; 93 } 94 95 /* round up and down to page boundaries. */ 96 #define ELF_ROUND(a, b) (((a) + (b) - 1) & ~((b) - 1)) 97 #define ELF_TRUNC(a, b) ((a) & ~((b) - 1)) 98 99 /* 100 * Copy arguments onto the stack in the normal way, but add some 101 * extra information in case of dynamic binding. 102 */ 103 int 104 netbsd32_elf32_copyargs(struct proc *p, struct exec_package *pack, 105 struct ps_strings *arginfo, char **stackp, void *argp) 106 { 107 size_t len; 108 AuxInfo ai[ELF_AUX_ENTRIES], *a; 109 struct elf_args *ap; 110 int error; 111 112 if ((error = netbsd32_copyargs(p, pack, arginfo, stackp, argp)) != 0) 113 return error; 114 115 a = ai; 116 117 /* 118 * Push extra arguments on the stack needed by dynamically 119 * linked binaries 120 */ 121 if ((ap = (struct elf_args *)pack->ep_emul_arg)) { 122 123 a->a_type = AT_PHDR; 124 a->a_v = ap->arg_phaddr; 125 a++; 126 127 a->a_type = AT_PHENT; 128 a->a_v = ap->arg_phentsize; 129 a++; 130 131 a->a_type = AT_PHNUM; 132 a->a_v = ap->arg_phnum; 133 a++; 134 135 a->a_type = AT_PAGESZ; 136 a->a_v = NBPG; 137 a++; 138 139 a->a_type = AT_BASE; 140 a->a_v = ap->arg_interp; 141 a++; 142 143 a->a_type = AT_FLAGS; 144 a->a_v = 0; 145 a++; 146 147 a->a_type = AT_ENTRY; 148 a->a_v = ap->arg_entry; 149 a++; 150 151 a->a_type = AT_EUID; 152 a->a_v = p->p_ucred->cr_uid; 153 a++; 154 155 a->a_type = AT_RUID; 156 a->a_v = p->p_cred->p_ruid; 157 a++; 158 159 a->a_type = AT_EGID; 160 a->a_v = p->p_ucred->cr_gid; 161 a++; 162 163 a->a_type = AT_RGID; 164 a->a_v = p->p_cred->p_rgid; 165 a++; 166 167 free((char *)ap, M_TEMP); 168 pack->ep_emul_arg = NULL; 169 } 170 171 a->a_type = AT_NULL; 172 a->a_v = 0; 173 a++; 174 175 len = (a - ai) * sizeof(AuxInfo); 176 if ((error = copyout(ai, *stackp, len)) != 0) 177 return error; 178 *stackp += len; 179 180 return 0; 181 } 182