1 /* 2 * Copyright (c) 1994 Christos Zoulas 3 * Copyright (c) 1995 Frank van der Linden 4 * Copyright (c) 1995 Scott Bartram 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, BUT 23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28 * 29 * from: svr4_util.h,v 1.5 1994/11/18 02:54:31 christos Exp 30 * from: linux_util.h,v 1.2 1995/03/05 23:23:50 fvdl Exp 31 * $FreeBSD$ 32 */ 33 34 /* 35 * This file is pretty much the same as Christos' svr4_util.h 36 * (for now). 37 */ 38 39 #ifndef _LINUX_UTIL_H_ 40 #define _LINUX_UTIL_H_ 41 42 #include <vm/vm.h> 43 #include <vm/vm_param.h> 44 #include <vm/pmap.h> 45 #include <machine/vmparam.h> 46 #include <sys/exec.h> 47 #include <sys/sysent.h> 48 #include <sys/cdefs.h> 49 50 static __inline caddr_t stackgap_init(void); 51 static __inline void *stackgap_alloc(caddr_t *, size_t); 52 53 #define szsigcode (*(curthread->td_proc->p_sysent->sv_szsigcode)) 54 55 static __inline caddr_t 56 stackgap_init() 57 { 58 return (caddr_t)(PS_STRINGS - szsigcode - SPARE_USRSPACE); 59 } 60 61 static __inline void * 62 stackgap_alloc(sgp, sz) 63 caddr_t *sgp; 64 size_t sz; 65 { 66 void *p = (void *) *sgp; 67 68 sz = ALIGN(sz); 69 if (*sgp + sz > (caddr_t)(PS_STRINGS - szsigcode)) 70 return NULL; 71 *sgp += sz; 72 return p; 73 } 74 75 extern const char linux_emul_path[]; 76 77 int linux_emul_find(struct thread *, caddr_t *, char *, char **, int); 78 79 #define CHECKALT(p, sgp, path, i) \ 80 do { \ 81 int _error; \ 82 \ 83 _error = linux_emul_find(p, sgp, path, &path, i); \ 84 if (_error == EFAULT) \ 85 return (_error); \ 86 } while (0) 87 88 #define CHECKALTEXIST(p, sgp, path) CHECKALT(p, sgp, path, 0) 89 #define CHECKALTCREAT(p, sgp, path) CHECKALT(p, sgp, path, 1) 90 91 #define DUMMY(s) \ 92 int \ 93 linux_ ## s(struct thread *p, struct linux_ ## s ## _args *args) \ 94 { \ 95 return (unsupported_msg(p, #s)); \ 96 } \ 97 struct __hack 98 99 static __inline int 100 unsupported_msg(struct thread *td, const char *fname) 101 { 102 103 printf("linux: syscall %s is obsoleted or not implemented (pid=%ld)\n", 104 fname, (long)td->td_proc->p_pid); 105 return (ENOSYS); 106 } 107 108 #endif /* !_LINUX_UTIL_H_ */ 109