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 #define psstrings (curthread->td_proc->p_sysent->sv_psstrings) 57 58 static __inline caddr_t 59 stackgap_init() 60 { 61 return (caddr_t)(psstrings - szsigcode - SPARE_USRSPACE); 62 } 63 64 static __inline void * 65 stackgap_alloc(sgp, sz) 66 caddr_t *sgp; 67 size_t sz; 68 { 69 void *p = (void *) *sgp; 70 71 sz = ALIGN(sz); 72 if (*sgp + sz > (caddr_t)(psstrings - szsigcode)) 73 return NULL; 74 *sgp += sz; 75 return p; 76 } 77 78 extern const char linux_emul_path[]; 79 80 int linux_emul_convpath(struct thread *, char *, enum uio_seg, char **, int); 81 int linux_emul_find(struct thread *, caddr_t *, char *, char **, int); 82 83 #define CHECKALT(td, sgp, path, i) \ 84 do { \ 85 int _error; \ 86 \ 87 _error = linux_emul_find(td, sgp, path, &path, i); \ 88 if (_error == EFAULT) \ 89 return (_error); \ 90 } while (0) 91 92 #define CHECKALTEXIST(td, sgp, path) CHECKALT(td, sgp, path, 0) 93 #define CHECKALTCREAT(td, sgp, path) CHECKALT(td, sgp, path, 1) 94 95 #define LCONVPATH(td, upath, pathp, i) \ 96 do { \ 97 int _error; \ 98 \ 99 _error = linux_emul_convpath(td, upath, UIO_USERSPACE, \ 100 pathp, i); \ 101 if (*(pathp) == NULL) \ 102 return (_error); \ 103 } while (0) 104 105 #define LCONVPATHEXIST(td, upath, pathp) LCONVPATH(td, upath, pathp, 0) 106 #define LCONVPATHCREAT(td, upath, pathp) LCONVPATH(td, upath, pathp, 1) 107 #define LFREEPATH(path) free(path, M_TEMP) 108 109 #define DUMMY(s) \ 110 int \ 111 linux_ ## s(struct thread *td, struct linux_ ## s ## _args *args) \ 112 { \ 113 return (unimplemented_syscall(td, #s)); \ 114 } \ 115 struct __hack 116 117 void linux_msg(const struct thread *td, const char *fmt, ...) 118 __printflike(2, 3); 119 120 static __inline int 121 unimplemented_syscall(struct thread *td, const char *syscallname) 122 { 123 124 linux_msg(td, "syscall %s not implemented", syscallname); 125 return (ENOSYS); 126 } 127 128 #endif /* !_LINUX_UTIL_H_ */ 129