2 * Copyright (c) 1998-1999 Andrew Gallatin
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer
10 * in this position and unchanged.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * 3. The name of the author may not be used to endorse or promote products
15 * derived from this software withough specific prior written permission
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32 #include <vm/vm_param.h>
37 #include <sys/sysent.h>
38 #include <sys/cdefs.h>
42 #define SCARG(p, x) (p)->x
45 struct ia32_ps_strings {
46 u_int32_t ps_argvstr; /* first of 0 or more argument strings */
47 int ps_nargvstr; /* the number of argument strings */
48 u_int32_t ps_envstr; /* first of 0 or more environment strings */
49 int ps_nenvstr; /* the number of environment strings */
52 #define IA32_USRSTACK (4L*1024*1024*1024 - PAGE_SIZE)
53 #define IA32_PS_STRINGS (IA32_USRSTACK - sizeof(struct ia32_ps_strings))
55 static __inline caddr_t stackgap_init(void);
56 static __inline void *stackgap_alloc(caddr_t *, size_t);
58 static __inline caddr_t
61 #define szsigcode (*(curproc->p_sysent->sv_szsigcode))
62 return (caddr_t)(((caddr_t)IA32_PS_STRINGS) - szsigcode - SPARE_USRSPACE);
66 static __inline void *
67 stackgap_alloc(sgp, sz)
79 extern const char ia32_emul_path[];
80 int ia32_emul_find(struct thread *, caddr_t *, const char *, char *,
83 #define CHECKALT(p, sgp, path, i) \
87 _error = ia32_emul_find(p, sgp, ia32_emul_path, path, \
89 if (_error == EFAULT) \
93 #define CHECKALTEXIST(p, sgp, path) CHECKALT((p), (sgp), (path), 0)
94 #define CHECKALTCREAT(p, sgp, path) CHECKALT((p), (sgp), (path), 1)