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/syslog.h> 49 #include <sys/cdefs.h> 50 #include <sys/uio.h> 51 52 static __inline caddr_t stackgap_init(void); 53 static __inline void *stackgap_alloc(caddr_t *, size_t); 54 55 #define szsigcode (*(curthread->td_proc->p_sysent->sv_szsigcode)) 56 57 static __inline caddr_t 58 stackgap_init() 59 { 60 return (caddr_t)(PS_STRINGS - szsigcode - SPARE_USRSPACE); 61 } 62 63 static __inline void * 64 stackgap_alloc(sgp, sz) 65 caddr_t *sgp; 66 size_t sz; 67 { 68 void *p = (void *) *sgp; 69 70 sz = ALIGN(sz); 71 if (*sgp + sz > (caddr_t)(PS_STRINGS - szsigcode)) 72 return NULL; 73 *sgp += sz; 74 return p; 75 } 76 77 extern const char linux_emul_path[]; 78 79 int linux_emul_convpath(struct thread *, char *, enum uio_seg, char **, int); 80 int linux_emul_find(struct thread *, caddr_t *, char *, char **, int); 81 82 #define CHECKALT(p, sgp, path, i) \ 83 do { \ 84 int _error; \ 85 \ 86 _error = linux_emul_find(p, sgp, path, &path, i); \ 87 if (_error == EFAULT) \ 88 return (_error); \ 89 } while (0) 90 91 #define CHECKALTEXIST(p, sgp, path) CHECKALT(p, sgp, path, 0) 92 #define CHECKALTCREAT(p, sgp, path) CHECKALT(p, sgp, path, 1) 93 94 #define LCONVPATH(td, upath, pathp, i) \ 95 do { \ 96 int _error; \ 97 \ 98 _error = linux_emul_convpath(td, upath, UIO_USERSPACE, \ 99 pathp, i); \ 100 if (*(pathp) == NULL) \ 101 return (_error); \ 102 } while (0) 103 104 #define LCONVPATHEXIST(td, upath, pathp) LCONVPATH(td, upath, pathp, 0) 105 #define LCONVPATHCREAT(td, upath, pathp) LCONVPATH(td, upath, pathp, 1) 106 #define LFREEPATH(path) free(path, M_TEMP) 107 108 #define DUMMY(s) \ 109 int \ 110 linux_ ## s(struct thread *p, struct linux_ ## s ## _args *args) \ 111 { \ 112 return (unimplemented_syscall(p, #s)); \ 113 } \ 114 struct __hack 115 116 void linux_msg(const struct thread *td, const char *fmt, ...) 117 __printflike(2, 3); 118 119 static __inline int 120 unimplemented_syscall(struct thread *td, const char *syscallname) 121 { 122 123 linux_msg(td, "syscall %s not implemented", syscallname); 124 return (ENOSYS); 125 } 126 127 #endif /* !_LINUX_UTIL_H_ */ 128