1 /* $NetBSD: netbsd32_exec_elf32.c,v 1.2 2000/12/02 04:08:35 mrg Exp $ */ 2 /* from: NetBSD: exec_aout.c,v 1.15 1996/09/26 23:34:46 cgd Exp */ 3 4 /* 5 * Copyright (c) 1998 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 #define ELFSIZE 32 36 37 #include <sys/param.h> 38 #include <sys/systm.h> 39 #include <sys/proc.h> 40 #include <sys/malloc.h> 41 #include <sys/vnode.h> 42 #include <sys/exec.h> 43 #include <sys/exec_elf.h> 44 #include <sys/resourcevar.h> 45 #include <sys/signal.h> 46 #include <sys/signalvar.h> 47 48 #include <compat/netbsd32/netbsd32.h> 49 #include <compat/netbsd32/netbsd32_exec.h> 50 51 #include <machine/frame.h> 52 #include <machine/netbsd32_machdep.h> 53 54 int netbsd32_copyinargs __P((struct exec_package *, struct ps_strings *, 55 void *, size_t, const void *, const void *)); 56 57 extern int ELFNAME2(netbsd,signature) __P((struct proc *, struct exec_package *, 58 Elf_Ehdr *)); 59 60 int 61 ELFNAME2(netbsd32,probe)(p, epp, eh, itp, pos) 62 struct proc *p; 63 struct exec_package *epp; 64 void *eh; 65 char *itp; 66 vaddr_t *pos; 67 { 68 int error; 69 size_t i; 70 const char *bp; 71 72 if ((error = ELFNAME2(netbsd,signature)(p, epp, eh)) != 0) 73 return error; 74 75 if (itp[0]) { 76 if ((error = emul_find(p, NULL, epp->ep_esch->es_emul->e_path, 77 itp, &bp, 0)) && 78 (error = emul_find(p, NULL, "", itp, &bp, 0))) 79 return error; 80 if ((error = copystr(bp, itp, MAXPATHLEN, &i)) != 0) 81 return error; 82 free((void *)bp, M_TEMP); 83 } 84 epp->ep_flags |= EXEC_32; 85 *(Elf_Addr *)pos = ELFDEFNNAME(NO_ADDR); 86 return 0; 87 } 88 89 /* round up and down to page boundaries. */ 90 #define ELF_ROUND(a, b) (((a) + (b) - 1) & ~((b) - 1)) 91 #define ELF_TRUNC(a, b) ((a) & ~((b) - 1)) 92 93 /* 94 * Copy arguments onto the stack in the normal way, but add some 95 * extra information in case of dynamic binding. 96 */ 97 void * 98 netbsd32_elf32_copyargs(pack, arginfo, stack, argp) 99 struct exec_package *pack; 100 struct ps_strings *arginfo; 101 void *stack; 102 void *argp; 103 { 104 size_t len; 105 AuxInfo ai[ELF_AUX_ENTRIES], *a; 106 struct elf_args *ap; 107 108 stack = netbsd32_copyargs(pack, arginfo, stack, argp); 109 if (!stack) 110 return NULL; 111 112 a = ai; 113 114 /* 115 * Push extra arguments on the stack needed by dynamically 116 * linked binaries 117 */ 118 if ((ap = (struct elf_args *)pack->ep_emul_arg)) { 119 120 a->a_type = AT_PHDR; 121 a->a_v = ap->arg_phaddr; 122 a++; 123 124 a->a_type = AT_PHENT; 125 a->a_v = ap->arg_phentsize; 126 a++; 127 128 a->a_type = AT_PHNUM; 129 a->a_v = ap->arg_phnum; 130 a++; 131 132 a->a_type = AT_PAGESZ; 133 a->a_v = NBPG; 134 a++; 135 136 a->a_type = AT_BASE; 137 a->a_v = ap->arg_interp; 138 a++; 139 140 a->a_type = AT_FLAGS; 141 a->a_v = 0; 142 a++; 143 144 a->a_type = AT_ENTRY; 145 a->a_v = ap->arg_entry; 146 a++; 147 148 free((char *)ap, M_TEMP); 149 pack->ep_emul_arg = NULL; 150 } 151 152 a->a_type = AT_NULL; 153 a->a_v = 0; 154 a++; 155 156 len = (a - ai) * sizeof(AuxInfo); 157 if (copyout(ai, stack, len)) 158 return NULL; 159 stack = (caddr_t)stack + len; 160 161 return stack; 162 } 163