1 /*
2 * Stack-less Just-In-Time compiler
3 *
4 * Copyright Zoltan Herczeg (hzmester@freemail.hu). All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without modification, are
7 * permitted provided that the following conditions are met:
8 *
9 * 1. Redistributions of source code must retain the above copyright notice, this list of
10 * conditions and the following disclaimer.
11 *
12 * 2. Redistributions in binary form must reproduce the above copyright notice, this list
13 * of conditions and the following disclaimer in the documentation and/or other materials
14 * provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) AND CONTRIBUTORS ``AS IS'' AND ANY
17 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
19 * SHALL THE COPYRIGHT HOLDER(S) OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
21 * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
22 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
23 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
24 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27 #include <sys/types.h>
28 #include <sys/mman.h>
29
alloc_chunk(sljit_uw size)30 static SLJIT_INLINE void* alloc_chunk(sljit_uw size)
31 {
32 void *retval;
33 int prot = PROT_READ | PROT_WRITE | PROT_EXEC;
34 int flags = MAP_PRIVATE;
35 int fd = -1;
36
37 #ifdef PROT_MAX
38 prot |= PROT_MAX(prot);
39 #endif
40
41 #ifdef MAP_ANON
42 flags |= MAP_ANON;
43 #else /* !MAP_ANON */
44 if (SLJIT_UNLIKELY((dev_zero < 0) && open_dev_zero()))
45 return NULL;
46
47 fd = dev_zero;
48 #endif /* MAP_ANON */
49
50 retval = mmap(NULL, size, prot, flags, fd, 0);
51 if (retval == MAP_FAILED)
52 return NULL;
53
54 return retval;
55 }
56
free_chunk(void * chunk,sljit_uw size)57 static SLJIT_INLINE void free_chunk(void *chunk, sljit_uw size)
58 {
59 munmap(chunk, size);
60 }
61
62 #include "sljitExecAllocatorCore.c"
63
