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 "opt_linux.h" 43 44 #include <vm/vm.h> 45 #include <vm/vm_param.h> 46 #include <vm/pmap.h> 47 #include <machine/vmparam.h> 48 #include <sys/exec.h> 49 #include <sys/sysent.h> 50 #include <sys/cdefs.h> 51 52 #ifndef SCARG 53 #define SCARG(p, x) (p)->x 54 #endif 55 56 static __inline caddr_t stackgap_init(void); 57 static __inline void *stackgap_alloc(caddr_t *, size_t); 58 59 static __inline caddr_t 60 stackgap_init() 61 { 62 #define szsigcode (*(curproc->p_sysent->sv_szsigcode)) 63 return (caddr_t)(PS_STRINGS - szsigcode - SPARE_USRSPACE); 64 } 65 66 67 static __inline void * 68 stackgap_alloc(sgp, sz) 69 caddr_t *sgp; 70 size_t sz; 71 { 72 void *p = (void *) *sgp; 73 *sgp += ALIGN(sz); 74 return p; 75 } 76 77 #ifdef DEBUG_LINUX 78 #define DPRINTF(a) printf a; 79 #else 80 #define DPRINTF(a) 81 #endif 82 83 extern const char linux_emul_path[]; 84 85 int linux_emul_find __P((struct proc *, caddr_t *, const char *, char *, 86 char **, int)); 87 88 #define CHECKALT(p, sgp, path, i) \ 89 do { \ 90 int _error; \ 91 \ 92 _error = linux_emul_find(p, sgp, linux_emul_path, path, \ 93 &path, i); \ 94 if (_error == EFAULT) \ 95 return (_error); \ 96 } while (0) 97 98 #define CHECKALTEXIST(p, sgp, path) CHECKALT(p, sgp, path, 0) 99 #define CHECKALTCREAT(p, sgp, path) CHECKALT(p, sgp, path, 1) 100 101 #endif /* !_LINUX_UTIL_H_ */ 102