dynamips/trunk/utils.h

/*
 * Cisco router simulation platform.
 * Copyright (c) 2005,2006 Christophe Fillot (cf@utc.fr)
 */

#ifndef __UTILS_H__
#define __UTILS_H__

#include <stdarg.h>
#include <sys/types.h>
#include <sys/mman.h>
#include <sys/time.h>
#include <time.h>
#include <netinet/in.h>

/* True/False definitions */
#ifndef FALSE
#define FALSE 0
#endif

#ifndef TRUE
#define TRUE  1
#endif

/* Host CPU Types */
#define CPU_x86    0
#define CPU_amd64  1
#define CPU_nojit  2

/* Number of host registers available for JIT */
#if JIT_CPU == CPU_x86
#define JIT_HOST_NREG  8
#elif JIT_CPU == CPU_amd64
#define JIT_HOST_NREG  16
#else
#define JIT_HOST_NREG  0
#endif

/* Endianness */
#define ARCH_BIG_ENDIAN     0x4321
#define ARCH_LITTLE_ENDIAN  0x1234

#if defined(PPC) || defined(__powerpc__) || defined(__ppc__)
#define ARCH_BYTE_ORDER ARCH_BIG_ENDIAN
#elif defined(__sparc) || defined(__sparc__)
#define ARCH_BYTE_ORDER ARCH_BIG_ENDIAN
#elif defined(__alpha) || defined(__alpha__)
#define ARCH_BYTE_ORDER ARCH_LITTLE_ENDIAN
#elif defined(__i386) || defined(__i386__) || defined(i386)
#define ARCH_BYTE_ORDER ARCH_LITTLE_ENDIAN
#elif defined(__x86_64__)
#define ARCH_BYTE_ORDER ARCH_LITTLE_ENDIAN
#endif

#ifndef ARCH_BYTE_ORDER
#error Please define your architecture in utils.h!
#endif

/* Host to VM (big-endian) conversion functions */
#if ARCH_BYTE_ORDER == ARCH_BIG_ENDIAN
#define htovm16(x) (x)
#define htovm32(x) (x)
#define htovm64(x) (x)

#define vmtoh16(x) (x)
#define vmtoh32(x) (x)
#define vmtoh64(x) (x)
#else
#define htovm16(x) (htons(x))
#define htovm32(x) (htonl(x))
#define htovm64(x) (swap64(x))

#define vmtoh16(x) (ntohs(x))
#define vmtoh32(x) (ntohl(x))
#define vmtoh64(x) (swap64(x))
#endif

/* Useful attributes for functions */
#define asmlinkage __attribute__((regparm(0)))
#define fastcall   __attribute__((regparm(3)))

#if __GNUC__ > 2
#define forced_inline inline __attribute__((always_inline))
#define no_inline __attribute__ ((noinline))
#else
#define forced_inline inline
#define no_inline
#endif

#if __GNUC__ > 2
/* http://kerneltrap.org/node/4705 */
#define likely(x)    __builtin_expect((x),1)
#define unlikely(x)  __builtin_expect((x),0)
#else
#define likely(x)    (x)
#define unlikely(x)  (x)
#endif

/* Common types */
typedef unsigned char m_uint8_t;
typedef signed char m_int8_t;

typedef unsigned short m_uint16_t;
typedef signed short m_int16_t;

typedef unsigned int m_uint32_t;
typedef signed int m_int32_t;

typedef unsigned long long m_uint64_t;
typedef signed long long m_int64_t;

typedef unsigned long m_iptr_t;
typedef m_uint64_t m_tmcnt_t;

/* Forward declarations */
typedef struct cpu_gen cpu_gen_t;
typedef struct vm_instance vm_instance_t;
typedef struct mips64_jit_tcb mips64_jit_tcb_t;
typedef struct ppc32_jit_tcb ppc32_jit_tcb_t;
typedef struct jit_op jit_op_t;

/* Translated block function pointer */
typedef void (*insn_tblock_fptr)(void);

/* Host executable page */
typedef struct insn_exec_page insn_exec_page_t;
struct insn_exec_page {
   u_char *ptr;
   insn_exec_page_t *next;
};

/* MIPS instruction */
typedef m_uint32_t mips_insn_t;

/* PowerPC instruction */
typedef m_uint32_t ppc_insn_t;

/* Max and min macro */
#define m_max(a,b) (((a) > (b)) ? (a) : (b))
#define m_min(a,b) (((a) < (b)) ? (a) : (b))

/* A simple macro for adjusting pointers */
#define PTR_ADJUST(type,ptr,size) (type)((char *)(ptr) + (size))

/* Size of a field in a structure */
#define SIZEOF(st,field) (sizeof(((st *)NULL)->field))

/* Compute offset of a field in a structure */
#define OFFSET(st,f)     ((long)&((st *)(NULL))->f)

/* MMAP */
#ifndef MAP_ANONYMOUS
#define MAP_ANONYMOUS MAP_ANON
#endif

/* List item */
typedef struct m_list m_list_t;
struct m_list {
   void *data;
   m_list_t *next;
};

/* MTS mapping info */
typedef struct {
   m_uint64_t vaddr;
   m_uint64_t paddr;
   m_uint64_t len;
   m_uint32_t cached;
   m_uint32_t tlb_index;
}mts_map_t;

/* Invalid VTLB entry */
#define MTS_INV_ENTRY_MASK  0x00000001

/* MTS entry flags */
#define MTS_FLAG_DEV   0x000000001   /* Virtual device used */
#define MTS_FLAG_COW   0x000000002   /* Copy-On-Write */
#define MTS_FLAG_EXEC  0x000000004   /* Exec page */

/* Virtual TLB entry (32-bit MMU) */
typedef struct mts32_entry mts32_entry_t;
struct mts32_entry {
   m_uint32_t gvpa;   /* Guest Virtual Page Address */
   m_uint32_t gppa;   /* Guest Physical Page Address */
   m_iptr_t   hpa;    /* Host Page Address */
   m_uint32_t flags;  /* Flags */
}__attribute__ ((aligned(16)));

/* Virtual TLB entry (64-bit MMU) */
typedef struct mts64_entry mts64_entry_t;
struct mts64_entry {
   m_uint64_t gvpa;   /* Guest Virtual Page Address */
   m_uint64_t gppa;   /* Guest Physical Page Address */
   m_iptr_t   hpa;    /* Host Page Address */
   m_uint32_t flags;  /* Flags */
}__attribute__ ((aligned(16)));

/* Host register allocation */
#define HREG_FLAG_ALLOC_LOCKED  1
#define HREG_FLAG_ALLOC_FORCED  2

struct hreg_map {
   int hreg,vreg;
   int flags;
   struct hreg_map *prev,*next;
};

/* Global logfile */
extern FILE *log_file;

/* Check status of a bit */
static inline int check_bit(u_int old,u_int new,u_int bit)
{
   int mask = 1 << bit;

   if ((old & mask) && !(new & mask))
      return(1);   /* bit unset */
   
   if (!(old & mask) && (new & mask))
      return(2);   /* bit set */

   /* no change */
   return(0);
}

/* Sign-extension */
static forced_inline m_int64_t sign_extend(m_int64_t x,int len)
{
   len = 64 - len;
   return (x << len) >> len;
}

/* Sign-extension (32-bit) */
static forced_inline m_int32_t sign_extend_32(m_int32_t x,int len)
{
   len = 32 - len;
   return (x << len) >> len;
}

/* Extract bits from a 32-bit values */
static inline int bits(m_uint32_t val,int start,int end)
{
   return((val >> start) & ((1 << (end-start+1)) - 1));
}

/* Normalize a size */
static inline u_int normalize_size(u_int val,u_int nb,int shift) 
{
   return(((val+nb-1) & ~(nb-1)) >> shift);
}

/* Convert a 16-bit number between little and big endian */
static forced_inline m_uint16_t swap16(m_uint16_t value)
{
   return((value >> 8) | ((value & 0xFF) << 8));
}

/* Convert a 32-bit number between little and big endian */
static forced_inline m_uint32_t swap32(m_uint32_t value)
{
   m_uint32_t result;

   result = value >> 24;
   result |= ((value >> 16) & 0xff) << 8;
   result |= ((value >> 8)  & 0xff) << 16;
   result |= (value & 0xff) << 24;
   return(result);
}

/* Convert a 64-bit number between little and big endian */
static forced_inline m_uint64_t swap64(m_uint64_t value)
{
   m_uint64_t result;

   result = (m_uint64_t)swap32(value & 0xffffffff) << 32;
   result |= swap32(value >> 32);
   return(result);
}

/* Get current time in number of msec since epoch */
static inline m_tmcnt_t m_gettime(void)
{
   struct timeval tvp;

   gettimeofday(&tvp,NULL);
   return(((m_tmcnt_t)tvp.tv_sec * 1000) + ((m_tmcnt_t)tvp.tv_usec / 1000));
}

/* Get current time in number of usec since epoch */
static inline m_tmcnt_t m_gettime_usec(void)
{
   struct timeval tvp;

   gettimeofday(&tvp,NULL);
   return(((m_tmcnt_t)tvp.tv_sec * 1000000) + (m_tmcnt_t)tvp.tv_usec);
}

#ifdef __CYGWIN__
#define GET_TIMEZONE _timezone
#else
#define GET_TIMEZONE timezone
#endif

/* Get current time in number of ms (localtime) */
static inline m_tmcnt_t m_gettime_adj(void)
{
   struct timeval tvp;
   struct tm tmx;
   time_t gmt_adjust;
   time_t ct;

   gettimeofday(&tvp,NULL);
   ct = tvp.tv_sec;
   localtime_r(&ct,&tmx);

#if defined(__CYGWIN__) || defined(SUNOS)
   gmt_adjust = -(tmx.tm_isdst ? GET_TIMEZONE - 3600 : GET_TIMEZONE);
#else
   gmt_adjust = tmx.tm_gmtoff;
#endif

   tvp.tv_sec += gmt_adjust;
   return(((m_tmcnt_t)tvp.tv_sec * 1000) + ((m_tmcnt_t)tvp.tv_usec / 1000));
}

/* Add an element to a list */
m_list_t *m_list_add(m_list_t **head,void *data);

/* Dynamic sprintf */
char *dyn_sprintf(const char *fmt,...);

/* Split a string */
int m_strsplit(char *str,char delim,char **array,int max_count);

/* Tokenize a string */
int m_strtok(char *str,char delim,char **array,int max_count);

/* Quote a string */
char *m_strquote(char *buffer,size_t buf_len,char *str);

/* Ugly function that dumps a structure in hexa and ascii. */
void mem_dump(FILE *f_output,u_char *pkt,u_int len);

/* Logging function */
void m_flog(FILE *fd,char *module,char *fmt,va_list ap);

/* Logging function */
void m_log(char *module,char *fmt,...);

/* Returns a line from specified file (remove trailing '\n') */
char *m_fgets(char *buffer,int size,FILE *fd);

/* Read a file and returns it in a buffer */
ssize_t m_read_file(char *filename,char **buffer);

/* Allocate aligned memory */
void *m_memalign(size_t boundary,size_t size);

/* Block specified signal for calling thread */
int m_signal_block(int sig);

/* Unblock specified signal for calling thread */
int m_signal_unblock(int sig);

/* Set non-blocking mode on a file descriptor */
int m_fd_set_non_block(int fd);

/* Map a memory zone from a file */
u_char *memzone_map_file(int fd,size_t len);

/* Map a memory zone from a file, with copy-on-write (COW) */
u_char *memzone_map_cow_file(int fd,size_t len);

/* Create a file to serve as a memory zone */
int memzone_create_file(char *filename,size_t len,u_char **ptr);

/* Open a file to serve as a COW memory zone */
int memzone_open_cow_file(char *filename,size_t len,u_char **ptr);

/* Open a file and map it in memory */
int memzone_open_file(char *filename,u_char **ptr,off_t *fsize);

/* Compute NVRAM checksum */
m_uint16_t nvram_cksum(m_uint16_t *ptr,size_t count);

/* Byte-swap a memory block */
void mem_bswap32(void *ptr,size_t len);

/* Reverse a byte */
m_uint8_t m_reverse_u8(m_uint8_t val);

#endif
1	dpavlin	1	/*
2	dpavlin	7	* Cisco router simulation platform.
3	dpavlin	1	* Copyright (c) 2005,2006 Christophe Fillot (cf@utc.fr)
4			*/
5
6			#ifndef __UTILS_H__
7			#define __UTILS_H__
8
9			#include <stdarg.h>
10			#include <sys/types.h>
11			#include <sys/mman.h>
12			#include <sys/time.h>
13			#include <time.h>
14			#include <netinet/in.h>
15
16			/* True/False definitions */
17			#ifndef FALSE
18			#define FALSE 0
19			#endif
20
21			#ifndef TRUE
22			#define TRUE 1
23			#endif
24
25	dpavlin	9	/* Host CPU Types */
26			#define CPU_x86 0
27			#define CPU_amd64 1
28			#define CPU_nojit 2
29
30			/* Number of host registers available for JIT */
31			#if JIT_CPU == CPU_x86
32			#define JIT_HOST_NREG 8
33			#elif JIT_CPU == CPU_amd64
34			#define JIT_HOST_NREG 16
35			#else
36			#define JIT_HOST_NREG 0
37			#endif
38
39	dpavlin	1	/* Endianness */
40			#define ARCH_BIG_ENDIAN 0x4321
41			#define ARCH_LITTLE_ENDIAN 0x1234
42
43			#if defined(PPC) \|\| defined(__powerpc__) \|\| defined(__ppc__)
44			#define ARCH_BYTE_ORDER ARCH_BIG_ENDIAN
45			#elif defined(__sparc) \|\| defined(__sparc__)
46			#define ARCH_BYTE_ORDER ARCH_BIG_ENDIAN
47			#elif defined(__alpha) \|\| defined(__alpha__)
48			#define ARCH_BYTE_ORDER ARCH_LITTLE_ENDIAN
49			#elif defined(__i386) \|\| defined(__i386__) \|\| defined(i386)
50			#define ARCH_BYTE_ORDER ARCH_LITTLE_ENDIAN
51			#elif defined(__x86_64__)
52			#define ARCH_BYTE_ORDER ARCH_LITTLE_ENDIAN
53			#endif
54
55			#ifndef ARCH_BYTE_ORDER
56			#error Please define your architecture in utils.h!
57			#endif
58
59			/* Host to VM (big-endian) conversion functions */
60			#if ARCH_BYTE_ORDER == ARCH_BIG_ENDIAN
61			#define htovm16(x) (x)
62			#define htovm32(x) (x)
63			#define htovm64(x) (x)
64
65			#define vmtoh16(x) (x)
66			#define vmtoh32(x) (x)
67			#define vmtoh64(x) (x)
68			#else
69			#define htovm16(x) (htons(x))
70			#define htovm32(x) (htonl(x))
71			#define htovm64(x) (swap64(x))
72
73			#define vmtoh16(x) (ntohs(x))
74			#define vmtoh32(x) (ntohl(x))
75			#define vmtoh64(x) (swap64(x))
76			#endif
77
78			/* Useful attributes for functions */
79			#define asmlinkage __attribute__((regparm(0)))
80			#define fastcall __attribute__((regparm(3)))
81
82			#if __GNUC__ > 2
83			#define forced_inline inline __attribute__((always_inline))
84			#define no_inline __attribute__ ((noinline))
85			#else
86			#define forced_inline inline
87			#define no_inline
88			#endif
89
90			#if __GNUC__ > 2
91			/* http://kerneltrap.org/node/4705 */
92			#define likely(x) __builtin_expect((x),1)
93			#define unlikely(x) __builtin_expect((x),0)
94			#else
95			#define likely(x) (x)
96			#define unlikely(x) (x)
97			#endif
98
99			/* Common types */
100			typedef unsigned char m_uint8_t;
101			typedef signed char m_int8_t;
102
103			typedef unsigned short m_uint16_t;
104			typedef signed short m_int16_t;
105
106			typedef unsigned int m_uint32_t;
107			typedef signed int m_int32_t;
108
109			typedef unsigned long long m_uint64_t;
110			typedef signed long long m_int64_t;
111
112			typedef unsigned long m_iptr_t;
113			typedef m_uint64_t m_tmcnt_t;
114
115			/* Forward declarations */
116	dpavlin	9	typedef struct cpu_gen cpu_gen_t;
117	dpavlin	1	typedef struct vm_instance vm_instance_t;
118	dpavlin	7	typedef struct mips64_jit_tcb mips64_jit_tcb_t;
119			typedef struct ppc32_jit_tcb ppc32_jit_tcb_t;
120	dpavlin	9	typedef struct jit_op jit_op_t;
121	dpavlin	7
122			/* Translated block function pointer */
123			typedef void (*insn_tblock_fptr)(void);
124
125			/* Host executable page */
126	dpavlin	1	typedef struct insn_exec_page insn_exec_page_t;
127	dpavlin	7	struct insn_exec_page {
128			u_char *ptr;
129			insn_exec_page_t *next;
130			};
131	dpavlin	1
132			/* MIPS instruction */
133			typedef m_uint32_t mips_insn_t;
134
135	dpavlin	7	/* PowerPC instruction */
136			typedef m_uint32_t ppc_insn_t;
137
138	dpavlin	1	/* Max and min macro */
139			#define m_max(a,b) (((a) > (b)) ? (a) : (b))
140			#define m_min(a,b) (((a) < (b)) ? (a) : (b))
141
142			/* A simple macro for adjusting pointers */
143			#define PTR_ADJUST(type,ptr,size) (type)((char *)(ptr) + (size))
144
145			/* Size of a field in a structure */
146			#define SIZEOF(st,field) (sizeof(((st *)NULL)->field))
147
148			/* Compute offset of a field in a structure */
149			#define OFFSET(st,f) ((long)&((st *)(NULL))->f)
150
151			/* MMAP */
152			#ifndef MAP_ANONYMOUS
153			#define MAP_ANONYMOUS MAP_ANON
154			#endif
155
156			/* List item */
157			typedef struct m_list m_list_t;
158			struct m_list {
159			void *data;
160			m_list_t *next;
161			};
162
163			/* MTS mapping info */
164			typedef struct {
165			m_uint64_t vaddr;
166			m_uint64_t paddr;
167			m_uint64_t len;
168			m_uint32_t cached;
169			m_uint32_t tlb_index;
170			}mts_map_t;
171
172	dpavlin	7	/* Invalid VTLB entry */
173			#define MTS_INV_ENTRY_MASK 0x00000001
174
175			/* MTS entry flags */
176	dpavlin	8	#define MTS_FLAG_DEV 0x000000001 /* Virtual device used */
177			#define MTS_FLAG_COW 0x000000002 /* Copy-On-Write */
178			#define MTS_FLAG_EXEC 0x000000004 /* Exec page */
179	dpavlin	7
180			/* Virtual TLB entry (32-bit MMU) */
181			typedef struct mts32_entry mts32_entry_t;
182			struct mts32_entry {
183			m_uint32_t gvpa; /* Guest Virtual Page Address */
184			m_uint32_t gppa; /* Guest Physical Page Address */
185			m_iptr_t hpa; /* Host Page Address */
186			m_uint32_t flags; /* Flags */
187			}__attribute__ ((aligned(16)));
188
189			/* Virtual TLB entry (64-bit MMU) */
190			typedef struct mts64_entry mts64_entry_t;
191			struct mts64_entry {
192			m_uint64_t gvpa; /* Guest Virtual Page Address */
193			m_uint64_t gppa; /* Guest Physical Page Address */
194			m_iptr_t hpa; /* Host Page Address */
195			m_uint32_t flags; /* Flags */
196			}__attribute__ ((aligned(16)));
197
198	dpavlin	9	/* Host register allocation */
199			#define HREG_FLAG_ALLOC_LOCKED 1
200			#define HREG_FLAG_ALLOC_FORCED 2
201
202			struct hreg_map {
203			int hreg,vreg;
204			int flags;
205			struct hreg_map prev,next;
206			};
207
208	dpavlin	1	/* Global logfile */
209			extern FILE *log_file;
210
211			/* Check status of a bit */
212			static inline int check_bit(u_int old,u_int new,u_int bit)
213			{
214			int mask = 1 << bit;
215
216			if ((old & mask) && !(new & mask))
217			return(1); /* bit unset */
218
219			if (!(old & mask) && (new & mask))
220			return(2); /* bit set */
221
222			/* no change */
223			return(0);
224			}
225
226			/* Sign-extension */
227			static forced_inline m_int64_t sign_extend(m_int64_t x,int len)
228			{
229			len = 64 - len;
230			return (x << len) >> len;
231			}
232
233	dpavlin	7	/* Sign-extension (32-bit) */
234			static forced_inline m_int32_t sign_extend_32(m_int32_t x,int len)
235			{
236			len = 32 - len;
237			return (x << len) >> len;
238			}
239
240	dpavlin	1	/* Extract bits from a 32-bit values */
241			static inline int bits(m_uint32_t val,int start,int end)
242			{
243			return((val >> start) & ((1 << (end-start+1)) - 1));
244			}
245
246			/* Normalize a size */
247			static inline u_int normalize_size(u_int val,u_int nb,int shift)
248			{
249			return(((val+nb-1) & ~(nb-1)) >> shift);
250			}
251
252			/* Convert a 16-bit number between little and big endian */
253			static forced_inline m_uint16_t swap16(m_uint16_t value)
254			{
255			return((value >> 8) \| ((value & 0xFF) << 8));
256			}
257
258			/* Convert a 32-bit number between little and big endian */
259			static forced_inline m_uint32_t swap32(m_uint32_t value)
260			{
261			m_uint32_t result;
262
263			result = value >> 24;
264			result \|= ((value >> 16) & 0xff) << 8;
265			result \|= ((value >> 8) & 0xff) << 16;
266			result \|= (value & 0xff) << 24;
267			return(result);
268			}
269
270			/* Convert a 64-bit number between little and big endian */
271			static forced_inline m_uint64_t swap64(m_uint64_t value)
272			{
273			m_uint64_t result;
274
275			result = (m_uint64_t)swap32(value & 0xffffffff) << 32;
276			result \|= swap32(value >> 32);
277			return(result);
278			}
279
280			/* Get current time in number of msec since epoch */
281			static inline m_tmcnt_t m_gettime(void)
282			{
283			struct timeval tvp;
284
285			gettimeofday(&tvp,NULL);
286			return(((m_tmcnt_t)tvp.tv_sec * 1000) + ((m_tmcnt_t)tvp.tv_usec / 1000));
287			}
288
289			/* Get current time in number of usec since epoch */
290			static inline m_tmcnt_t m_gettime_usec(void)
291			{
292			struct timeval tvp;
293
294			gettimeofday(&tvp,NULL);
295			return(((m_tmcnt_t)tvp.tv_sec * 1000000) + (m_tmcnt_t)tvp.tv_usec);
296			}
297
298	dpavlin	3	#ifdef __CYGWIN__
299			#define GET_TIMEZONE _timezone
300			#else
301			#define GET_TIMEZONE timezone
302			#endif
303
304			/* Get current time in number of ms (localtime) */
305			static inline m_tmcnt_t m_gettime_adj(void)
306			{
307			struct timeval tvp;
308			struct tm tmx;
309			time_t gmt_adjust;
310			time_t ct;
311
312			gettimeofday(&tvp,NULL);
313			ct = tvp.tv_sec;
314			localtime_r(&ct,&tmx);
315
316			#if defined(__CYGWIN__) \|\| defined(SUNOS)
317			gmt_adjust = -(tmx.tm_isdst ? GET_TIMEZONE - 3600 : GET_TIMEZONE);
318			#else
319			gmt_adjust = tmx.tm_gmtoff;
320			#endif
321
322			tvp.tv_sec += gmt_adjust;
323			return(((m_tmcnt_t)tvp.tv_sec * 1000) + ((m_tmcnt_t)tvp.tv_usec / 1000));
324			}
325
326	dpavlin	1	/* Add an element to a list */
327			m_list_t m_list_add(m_list_t head,void data);
328
329			/* Dynamic sprintf */
330			char dyn_sprintf(const char fmt,...);
331
332			/* Split a string */
333			int m_strsplit(char str,char delim,char *array,int max_count);
334
335			/* Tokenize a string */
336			int m_strtok(char str,char delim,char *array,int max_count);
337
338			/* Quote a string */
339			char m_strquote(char buffer,size_t buf_len,char *str);
340
341			/* Ugly function that dumps a structure in hexa and ascii. */
342			void mem_dump(FILE f_output,u_char pkt,u_int len);
343
344			/* Logging function */
345			void m_flog(FILE fd,char module,char *fmt,va_list ap);
346
347			/* Logging function */
348			void m_log(char module,char fmt,...);
349
350			/* Returns a line from specified file (remove trailing '\n') */
351			char m_fgets(char buffer,int size,FILE *fd);
352
353			/* Read a file and returns it in a buffer */
354			ssize_t m_read_file(char filename,char *buffer);
355
356			/* Allocate aligned memory */
357			void *m_memalign(size_t boundary,size_t size);
358
359	dpavlin	3	/* Block specified signal for calling thread */
360			int m_signal_block(int sig);
361
362			/* Unblock specified signal for calling thread */
363			int m_signal_unblock(int sig);
364
365			/* Set non-blocking mode on a file descriptor */
366			int m_fd_set_non_block(int fd);
367
368	dpavlin	4	/* Map a memory zone from a file */
369			u_char *memzone_map_file(int fd,size_t len);
370
371			/* Map a memory zone from a file, with copy-on-write (COW) */
372			u_char *memzone_map_cow_file(int fd,size_t len);
373
374			/* Create a file to serve as a memory zone */
375			int memzone_create_file(char filename,size_t len,u_char *ptr);
376
377			/* Open a file to serve as a COW memory zone */
378			int memzone_open_cow_file(char filename,size_t len,u_char *ptr);
379
380			/* Open a file and map it in memory */
381			int memzone_open_file(char filename,u_char ptr,off_t fsize);
382
383			/* Compute NVRAM checksum */
384			m_uint16_t nvram_cksum(m_uint16_t *ptr,size_t count);
385
386	dpavlin	7	/* Byte-swap a memory block */
387			void mem_bswap32(void *ptr,size_t len);
388
389	dpavlin	8	/* Reverse a byte */
390			m_uint8_t m_reverse_u8(m_uint8_t val);
391
392	dpavlin	1	#endif