2 * Mesa 3-D graphics library
5 * Copyright (C) 1999-2005 Brian Paul All Rights Reserved.
7 * Permission is hereby granted, free of charge, to any person obtaining a
8 * copy of this software and associated documentation files (the "Software"),
9 * to deal in the Software without restriction, including without limitation
10 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
11 * and/or sell copies of the Software, and to permit persons to whom the
12 * Software is furnished to do so, subject to the following conditions:
14 * The above copyright notice and this permission notice shall be included
15 * in all copies or substantial portions of the Software.
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
18 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
20 * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
21 * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
22 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
28 * Functions for allocating executable memory.
30 * \author Keith Whitwell
35 #include "glapi/glthread.h"
39 #if defined(__linux__) || defined(__OpenBSD__) || defined(_NetBSD__) || defined(__sun)
42 * Allocate a large block of memory which can hold code then dole it out
43 * in pieces by means of the generic memory manager code.
51 #include <selinux/selinux.h>
56 #define MAP_ANONYMOUS MAP_ANON
60 #define EXEC_HEAP_SIZE (10*1024*1024)
62 _glthread_DECLARE_STATIC_MUTEX(exec_mutex
);
64 static struct mem_block
*exec_heap
= NULL
;
65 static unsigned char *exec_mem
= NULL
;
72 if (is_selinux_enabled()) {
73 if (!security_get_boolean_active("allow_execmem") ||
74 !security_get_boolean_pending("allow_execmem"))
80 exec_heap
= mmInit( 0, EXEC_HEAP_SIZE
);
83 exec_mem
= mmap(NULL
, EXEC_HEAP_SIZE
, PROT_EXEC
| PROT_READ
| PROT_WRITE
,
84 MAP_PRIVATE
| MAP_ANONYMOUS
, -1, 0);
86 return (exec_mem
!= MAP_FAILED
);
91 _mesa_exec_malloc(GLuint size
)
93 struct mem_block
*block
= NULL
;
96 _glthread_LOCK_MUTEX(exec_mutex
);
102 size
= (size
+ 31) & ~31;
103 block
= mmAllocMem( exec_heap
, size
, 32, 0 );
107 addr
= exec_mem
+ block
->ofs
;
109 printf("_mesa_exec_malloc failed\n");
112 _glthread_UNLOCK_MUTEX(exec_mutex
);
119 _mesa_exec_free(void *addr
)
121 _glthread_LOCK_MUTEX(exec_mutex
);
124 struct mem_block
*block
= mmFindBlock(exec_heap
, (unsigned char *)addr
- exec_mem
);
130 _glthread_UNLOCK_MUTEX(exec_mutex
);
137 * Just use regular memory.
141 _mesa_exec_malloc(GLuint size
)
143 return malloc( size
);
148 _mesa_exec_free(void *addr
)