1 /* $NetBSD: netbsd32_execve.c,v 1.26 2006/03/07 03:32:06 thorpej Exp $ */ 2 3 /* 4 * Copyright (c) 1998, 2001 Matthew R. Green 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. The name of the author may not be used to endorse or promote products 16 * derived from this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 23 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 24 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 25 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 */ 30 31 #include <sys/cdefs.h> 32 33 __KERNEL_RCSID(0, "$NetBSD: netbsd32_execve.c,v 1.26 2006/03/07 03:32:06 thorpej Exp $"); 34 35 #include <sys/param.h> 36 #include <sys/systm.h> 37 #include <sys/mount.h> 38 #include <sys/stat.h> 39 #include <sys/vnode.h> 40 #include <sys/file.h> 41 #include <sys/filedesc.h> 42 #include <sys/sa.h> 43 #include <sys/syscallargs.h> 44 #include <sys/proc.h> 45 #include <sys/exec.h> 46 47 #include <compat/netbsd32/netbsd32.h> 48 #include <compat/netbsd32/netbsd32_syscall.h> 49 #include <compat/netbsd32/netbsd32_syscallargs.h> 50 51 static int 52 netbsd32_execve_fetch_element(char * const *array, size_t index, char **value) 53 { 54 int error; 55 netbsd32_charp const *a32 = (void const *)array; 56 netbsd32_charp e; 57 58 error = copyin(a32 + index, &e, sizeof(e)); 59 if (error) 60 return error; 61 *value = (char *)NETBSD32PTR64(e); 62 return 0; 63 } 64 65 int 66 netbsd32_execve(struct lwp *l, void *v, register_t *retval) 67 { 68 struct netbsd32_execve_args /* { 69 syscallarg(const netbsd32_charp) path; 70 syscallarg(netbsd32_charpp) argp; 71 syscallarg(netbsd32_charpp) envp; 72 } */ *uap = v; 73 caddr_t sg; 74 const char *path = NETBSD32PTR64(SCARG(uap, path)); 75 76 sg = stackgap_init(l->l_proc, 0); 77 CHECK_ALT_EXIST(l, &sg, path); 78 79 return execve1(l, path, NETBSD32PTR64(SCARG(uap, argp)), 80 NETBSD32PTR64(SCARG(uap, envp)), netbsd32_execve_fetch_element); 81 } 82