include/qemu-common.h

   1
   2 /* Common header file that is included by all of QEMU.
   3  *
   4  * This file is supposed to be included only by .c files. No header file should
   5  * depend on qemu-common.h, as this would easily lead to circular header
   6  * dependencies.
   7  *
   8  * If a header file uses a definition from qemu-common.h, that definition
   9  * must be moved to a separate header file, and the header that uses it
  10  * must include that header.
  11  */
  12 #ifndef QEMU_COMMON_H
  13 #define QEMU_COMMON_H
  14
  15 #include "qemu/compiler.h"
  16 #include "config-host.h"
  17 #include "qemu/typedefs.h"
  18 #include "qemu/fprintf-fn.h"
  19
  20 #if defined(__arm__) || defined(__sparc__) || defined(__mips__) || defined(__hppa__) || defined(__ia64__)
  21 #define WORDS_ALIGNED
  22 #endif
  23
  24 #define TFR(expr) do { if ((expr) != -1) break; } while (errno == EINTR)
  25
  26 /* we put basic includes here to avoid repeating them in device drivers */
  27 #include <stdlib.h>
  28 #include <stdio.h>
  29 #include <stdarg.h>
  30 #include <stdbool.h>
  31 #include <string.h>
  32 #include <strings.h>
  33 #include <inttypes.h>
  34 #include <limits.h>
  35 #include <time.h>
  36 #include <ctype.h>
  37 #include <errno.h>
  38 #include <unistd.h>
  39 #include <fcntl.h>
  40 #include <sys/stat.h>
  41 #include <sys/time.h>
  42 #include <assert.h>
  43 #include <signal.h>
  44 #include "glib-compat.h"
  45 #include "qemu/option.h"
  46
  47 #ifdef _WIN32
  48 #include "sysemu/os-win32.h"
  49 #endif
  50
  51 #ifdef CONFIG_POSIX
  52 #include "sysemu/os-posix.h"
  53 #endif
  54
  55 #ifndef O_LARGEFILE
  56 #define O_LARGEFILE 0
  57 #endif
  58 #ifndef O_BINARY
  59 #define O_BINARY 0
  60 #endif
  61 #ifndef MAP_ANONYMOUS
  62 #define MAP_ANONYMOUS MAP_ANON
  63 #endif
  64 #ifndef ENOMEDIUM
  65 #define ENOMEDIUM ENODEV
  66 #endif
  67 #if !defined(ENOTSUP)
  68 #define ENOTSUP 4096
  69 #endif
  70 #if !defined(ECANCELED)
  71 #define ECANCELED 4097
  72 #endif
  73 #if !defined(EMEDIUMTYPE)
  74 #define EMEDIUMTYPE 4098
  75 #endif
  76 #ifndef TIME_MAX
  77 #define TIME_MAX LONG_MAX
  78 #endif
  79
  80 /* HOST_LONG_BITS is the size of a native pointer in bits. */
  81 #if UINTPTR_MAX == UINT32_MAX
  82 # define HOST_LONG_BITS 32
  83 #elif UINTPTR_MAX == UINT64_MAX
  84 # define HOST_LONG_BITS 64
  85 #else
  86 # error Unknown pointer size
  87 #endif
  88
  89 #ifdef _WIN32
  90 #define fsync _commit
  91 #if !defined(lseek)
  92 # define lseek _lseeki64
  93 #endif
  94 int qemu_ftruncate64(int, int64_t);
  95 #if !defined(ftruncate)
  96 # define ftruncate qemu_ftruncate64
  97 #endif
  98
  99 static inline char *realpath(const char *path, char *resolved_path)
 100 {
 101     _fullpath(resolved_path, path, _MAX_PATH);
 102     return resolved_path;
 103 }
 104 #endif
 105
 106 void cpu_ticks_init(void);
 107
 108 /* icount */
 109 void configure_icount(QemuOpts *opts, Error **errp);
 110 extern int use_icount;
 111 extern int icount_align_option;
 112 /* drift information for info jit command */
 113 extern int64_t max_delay;
 114 extern int64_t max_advance;
 115 void dump_drift_info(FILE *f, fprintf_function cpu_fprintf);
 116
 117 #include "qemu/osdep.h"
 118 #include "qemu/bswap.h"
 119
 120 /* FIXME: Remove NEED_CPU_H.  */
 121 #ifdef NEED_CPU_H
 122 #include "cpu.h"
 123 #endif /* !defined(NEED_CPU_H) */
 124
 125 /* main function, renamed */
 126 #if defined(CONFIG_COCOA)
 127 int qemu_main(int argc, char **argv, char **envp);
 128 #endif
 129
 130 void qemu_get_timedate(struct tm *tm, int offset);
 131 int qemu_timedate_diff(struct tm *tm);
 132
 133 /**
 134  * is_help_option:
 135  * @s: string to test
 136  *
 137  * Check whether @s is one of the standard strings which indicate
 138  * that the user is asking for a list of the valid values for a
 139  * command option like -cpu or -M. The current accepted strings
 140  * are 'help' and '?'. '?' is deprecated (it is a shell wildcard
 141  * which makes it annoying to use in a reliable way) but provided
 142  * for backwards compatibility.
 143  *
 144  * Returns: true if @s is a request for a list.
 145  */
 146 static inline bool is_help_option(const char *s)
 147 {
 148     return !strcmp(s, "?") || !strcmp(s, "help");
 149 }
 150
 151 /* util/cutils.c */
 152 /**
 153  * pstrcpy:
 154  * @buf: buffer to copy string into
 155  * @buf_size: size of @buf in bytes
 156  * @str: string to copy
 157  *
 158  * Copy @str into @buf, including the trailing NUL, but do not
 159  * write more than @buf_size bytes. The resulting buffer is
 160  * always NUL terminated (even if the source string was too long).
 161  * If @buf_size is zero or negative then no bytes are copied.
 162  *
 163  * This function is similar to strncpy(), but avoids two of that
 164  * function's problems:
 165  *  * if @str fits in the buffer, pstrcpy() does not zero-fill the
 166  *    remaining space at the end of @buf
 167  *  * if @str is too long, pstrcpy() will copy the first @buf_size-1
 168  *    bytes and then add a NUL
 169  */
 170 void pstrcpy(char *buf, int buf_size, const char *str);
 171 /**
 172  * strpadcpy:
 173  * @buf: buffer to copy string into
 174  * @buf_size: size of @buf in bytes
 175  * @str: string to copy
 176  * @pad: character to pad the remainder of @buf with
 177  *
 178  * Copy @str into @buf (but *not* its trailing NUL!), and then pad the
 179  * rest of the buffer with the @pad character. If @str is too large
 180  * for the buffer then it is truncated, so that @buf contains the
 181  * first @buf_size characters of @str, with no terminator.
 182  */
 183 void strpadcpy(char *buf, int buf_size, const char *str, char pad);
 184 /**
 185  * pstrcat:
 186  * @buf: buffer containing existing string
 187  * @buf_size: size of @buf in bytes
 188  * @s: string to concatenate to @buf
 189  *
 190  * Append a copy of @s to the string already in @buf, but do not
 191  * allow the buffer to overflow. If the existing contents of @buf
 192  * plus @str would total more than @buf_size bytes, then write
 193  * as much of @str as will fit followed by a NUL terminator.
 194  *
 195  * @buf must already contain a NUL-terminated string, or the
 196  * behaviour is undefined.
 197  *
 198  * Returns: @buf.
 199  */
 200 char *pstrcat(char *buf, int buf_size, const char *s);
 201 /**
 202  * strstart:
 203  * @str: string to test
 204  * @val: prefix string to look for
 205  * @ptr: NULL, or pointer to be written to indicate start of
 206  *       the remainder of the string
 207  *
 208  * Test whether @str starts with the prefix @val.
 209  * If it does (including the degenerate case where @str and @val
 210  * are equal) then return true. If @ptr is not NULL then a
 211  * pointer to the first character following the prefix is written
 212  * to it. If @val is not a prefix of @str then return false (and
 213  * @ptr is not written to).
 214  *
 215  * Returns: true if @str starts with prefix @val, false otherwise.
 216  */
 217 int strstart(const char *str, const char *val, const char **ptr);
 218 /**
 219  * stristart:
 220  * @str: string to test
 221  * @val: prefix string to look for
 222  * @ptr: NULL, or pointer to be written to indicate start of
 223  *       the remainder of the string
 224  *
 225  * Test whether @str starts with the case-insensitive prefix @val.
 226  * This function behaves identically to strstart(), except that the
 227  * comparison is made after calling qemu_toupper() on each pair of
 228  * characters.
 229  *
 230  * Returns: true if @str starts with case-insensitive prefix @val,
 231  *          false otherwise.
 232  */
 233 int stristart(const char *str, const char *val, const char **ptr);
 234 /**
 235  * qemu_strnlen:
 236  * @s: string
 237  * @max_len: maximum number of bytes in @s to scan
 238  *
 239  * Return the length of the string @s, like strlen(), but do not
 240  * examine more than @max_len bytes of the memory pointed to by @s.
 241  * If no NUL terminator is found within @max_len bytes, then return
 242  * @max_len instead.
 243  *
 244  * This function has the same behaviour as the POSIX strnlen()
 245  * function.
 246  *
 247  * Returns: length of @s in bytes, or @max_len, whichever is smaller.
 248  */
 249 int qemu_strnlen(const char *s, int max_len);
 250 /**
 251  * qemu_strsep:
 252  * @input: pointer to string to parse
 253  * @delim: string containing delimiter characters to search for
 254  *
 255  * Locate the first occurrence of any character in @delim within
 256  * the string referenced by @input, and replace it with a NUL.
 257  * The location of the next character after the delimiter character
 258  * is stored into @input.
 259  * If the end of the string was reached without finding a delimiter
 260  * character, then NULL is stored into @input.
 261  * If @input points to a NULL pointer on entry, return NULL.
 262  * The return value is always the original value of *@input (and
 263  * so now points to a NUL-terminated string corresponding to the
 264  * part of the input up to the first delimiter).
 265  *
 266  * This function has the same behaviour as the BSD strsep() function.
 267  *
 268  * Returns: the pointer originally in @input.
 269  */
 270 char *qemu_strsep(char **input, const char *delim);
 271 time_t mktimegm(struct tm *tm);
 272 int qemu_fls(int i);
 273 int qemu_fdatasync(int fd);
 274 int fcntl_setfl(int fd, int flag);
 275 int qemu_parse_fd(const char *param);
 276
 277 int parse_uint(const char *s, unsigned long long *value, char **endptr,
 278                int base);
 279 int parse_uint_full(const char *s, unsigned long long *value, int base);
 280
 281 /*
 282  * strtosz() suffixes used to specify the default treatment of an
 283  * argument passed to strtosz() without an explicit suffix.
 284  * These should be defined using upper case characters in the range
 285  * A-Z, as strtosz() will use qemu_toupper() on the given argument
 286  * prior to comparison.
 287  */
 288 #define STRTOSZ_DEFSUFFIX_EB    'E'
 289 #define STRTOSZ_DEFSUFFIX_PB    'P'
 290 #define STRTOSZ_DEFSUFFIX_TB    'T'
 291 #define STRTOSZ_DEFSUFFIX_GB    'G'
 292 #define STRTOSZ_DEFSUFFIX_MB    'M'
 293 #define STRTOSZ_DEFSUFFIX_KB    'K'
 294 #define STRTOSZ_DEFSUFFIX_B     'B'
 295 int64_t strtosz(const char *nptr, char **end);
 296 int64_t strtosz_suffix(const char *nptr, char **end, const char default_suffix);
 297 int64_t strtosz_suffix_unit(const char *nptr, char **end,
 298                             const char default_suffix, int64_t unit);
 299 #define K_BYTE     (1ULL << 10)
 300 #define M_BYTE     (1ULL << 20)
 301 #define G_BYTE     (1ULL << 30)
 302 #define T_BYTE     (1ULL << 40)
 303 #define P_BYTE     (1ULL << 50)
 304 #define E_BYTE     (1ULL << 60)
 305
 306 /* used to print char* safely */
 307 #define STR_OR_NULL(str) ((str) ? (str) : "null")
 308
 309 /* id.c */
 310 bool id_wellformed(const char *id);
 311
 312 /* path.c */
 313 void init_paths(const char *prefix);
 314 const char *path(const char *pathname);
 315
 316 #define qemu_isalnum(c)         isalnum((unsigned char)(c))
 317 #define qemu_isalpha(c)         isalpha((unsigned char)(c))
 318 #define qemu_iscntrl(c)         iscntrl((unsigned char)(c))
 319 #define qemu_isdigit(c)         isdigit((unsigned char)(c))
 320 #define qemu_isgraph(c)         isgraph((unsigned char)(c))
 321 #define qemu_islower(c)         islower((unsigned char)(c))
 322 #define qemu_isprint(c)         isprint((unsigned char)(c))
 323 #define qemu_ispunct(c)         ispunct((unsigned char)(c))
 324 #define qemu_isspace(c)         isspace((unsigned char)(c))
 325 #define qemu_isupper(c)         isupper((unsigned char)(c))
 326 #define qemu_isxdigit(c)        isxdigit((unsigned char)(c))
 327 #define qemu_tolower(c)         tolower((unsigned char)(c))
 328 #define qemu_toupper(c)         toupper((unsigned char)(c))
 329 #define qemu_isascii(c)         isascii((unsigned char)(c))
 330 #define qemu_toascii(c)         toascii((unsigned char)(c))
 331
 332 void *qemu_oom_check(void *ptr);
 333
 334 ssize_t qemu_write_full(int fd, const void *buf, size_t count)
 335     QEMU_WARN_UNUSED_RESULT;
 336
 337 #ifndef _WIN32
 338 int qemu_pipe(int pipefd[2]);
 339 /* like openpty() but also makes it raw; return master fd */
 340 int qemu_openpty_raw(int *aslave, char *pty_name);
 341 #endif
 342
 343 #ifdef _WIN32
 344 /* MinGW needs type casts for the 'buf' and 'optval' arguments. */
 345 #define qemu_getsockopt(sockfd, level, optname, optval, optlen) \
 346     getsockopt(sockfd, level, optname, (void *)optval, optlen)
 347 #define qemu_setsockopt(sockfd, level, optname, optval, optlen) \
 348     setsockopt(sockfd, level, optname, (const void *)optval, optlen)
 349 #define qemu_recv(sockfd, buf, len, flags) recv(sockfd, (void *)buf, len, flags)
 350 #define qemu_sendto(sockfd, buf, len, flags, destaddr, addrlen) \
 351     sendto(sockfd, (const void *)buf, len, flags, destaddr, addrlen)
 352 #else
 353 #define qemu_getsockopt(sockfd, level, optname, optval, optlen) \
 354     getsockopt(sockfd, level, optname, optval, optlen)
 355 #define qemu_setsockopt(sockfd, level, optname, optval, optlen) \
 356     setsockopt(sockfd, level, optname, optval, optlen)
 357 #define qemu_recv(sockfd, buf, len, flags) recv(sockfd, buf, len, flags)
 358 #define qemu_sendto(sockfd, buf, len, flags, destaddr, addrlen) \
 359     sendto(sockfd, buf, len, flags, destaddr, addrlen)
 360 #endif
 361
 362 /* Error handling.  */
 363
 364 void QEMU_NORETURN hw_error(const char *fmt, ...) GCC_FMT_ATTR(1, 2);
 365
 366 struct ParallelIOArg {
 367     void *buffer;
 368     int count;
 369 };
 370
 371 typedef int (*DMA_transfer_handler) (void *opaque, int nchan, int pos, int size);
 372
 373 typedef uint64_t pcibus_t;
 374
 375 typedef struct PCIHostDeviceAddress {
 376     unsigned int domain;
 377     unsigned int bus;
 378     unsigned int slot;
 379     unsigned int function;
 380 } PCIHostDeviceAddress;
 381
 382 void tcg_exec_init(unsigned long tb_size);
 383 bool tcg_enabled(void);
 384
 385 void cpu_exec_init_all(void);
 386
 387 /* CPU save/load.  */
 388 #ifdef CPU_SAVE_VERSION
 389 void cpu_save(QEMUFile *f, void *opaque);
 390 int cpu_load(QEMUFile *f, void *opaque, int version_id);
 391 #endif
 392
 393 /* Unblock cpu */
 394 void qemu_cpu_kick_self(void);
 395
 396 /* work queue */
 397 struct qemu_work_item {
 398     struct qemu_work_item *next;
 399     void (*func)(void *data);
 400     void *data;
 401     int done;
 402     bool free;
 403 };
 404
 405
 406 /**
 407  * Sends a (part of) iovec down a socket, yielding when the socket is full, or
 408  * Receives data into a (part of) iovec from a socket,
 409  * yielding when there is no data in the socket.
 410  * The same interface as qemu_sendv_recvv(), with added yielding.
 411  * XXX should mark these as coroutine_fn
 412  */
 413 ssize_t qemu_co_sendv_recvv(int sockfd, struct iovec *iov, unsigned iov_cnt,
 414                             size_t offset, size_t bytes, bool do_send);
 415 #define qemu_co_recvv(sockfd, iov, iov_cnt, offset, bytes) \
 416   qemu_co_sendv_recvv(sockfd, iov, iov_cnt, offset, bytes, false)
 417 #define qemu_co_sendv(sockfd, iov, iov_cnt, offset, bytes) \
 418   qemu_co_sendv_recvv(sockfd, iov, iov_cnt, offset, bytes, true)
 419
 420 /**
 421  * The same as above, but with just a single buffer
 422  */
 423 ssize_t qemu_co_send_recv(int sockfd, void *buf, size_t bytes, bool do_send);
 424 #define qemu_co_recv(sockfd, buf, bytes) \
 425   qemu_co_send_recv(sockfd, buf, bytes, false)
 426 #define qemu_co_send(sockfd, buf, bytes) \
 427   qemu_co_send_recv(sockfd, buf, bytes, true)
 428
 429 typedef struct QEMUIOVector {
 430     struct iovec *iov;
 431     int niov;
 432     int nalloc;
 433     size_t size;
 434 } QEMUIOVector;
 435
 436 void qemu_iovec_init(QEMUIOVector *qiov, int alloc_hint);
 437 void qemu_iovec_init_external(QEMUIOVector *qiov, struct iovec *iov, int niov);
 438 void qemu_iovec_add(QEMUIOVector *qiov, void *base, size_t len);
 439 void qemu_iovec_concat(QEMUIOVector *dst,
 440                        QEMUIOVector *src, size_t soffset, size_t sbytes);
 441 size_t qemu_iovec_concat_iov(QEMUIOVector *dst,
 442                              struct iovec *src_iov, unsigned int src_cnt,
 443                              size_t soffset, size_t sbytes);
 444 bool qemu_iovec_is_zero(QEMUIOVector *qiov);
 445 void qemu_iovec_destroy(QEMUIOVector *qiov);
 446 void qemu_iovec_reset(QEMUIOVector *qiov);
 447 size_t qemu_iovec_to_buf(QEMUIOVector *qiov, size_t offset,
 448                          void *buf, size_t bytes);
 449 size_t qemu_iovec_from_buf(QEMUIOVector *qiov, size_t offset,
 450                            const void *buf, size_t bytes);
 451 size_t qemu_iovec_memset(QEMUIOVector *qiov, size_t offset,
 452                          int fillc, size_t bytes);
 453 ssize_t qemu_iovec_compare(QEMUIOVector *a, QEMUIOVector *b);
 454 void qemu_iovec_clone(QEMUIOVector *dest, const QEMUIOVector *src, void *buf);
 455 void qemu_iovec_discard_back(QEMUIOVector *qiov, size_t bytes);
 456
 457 bool buffer_is_zero(const void *buf, size_t len);
 458
 459 void qemu_progress_init(int enabled, float min_skip);
 460 void qemu_progress_end(void);
 461 void qemu_progress_print(float delta, int max);
 462 const char *qemu_get_vm_name(void);
 463
 464 #define QEMU_FILE_TYPE_BIOS   0
 465 #define QEMU_FILE_TYPE_KEYMAP 1
 466 char *qemu_find_file(int type, const char *name);
 467
 468 /* OS specific functions */
 469 void os_setup_early_signal_handling(void);
 470 char *os_find_datadir(void);
 471 void os_parse_cmd_args(int index, const char *optarg);
 472
 473 /* Convert a byte between binary and BCD.  */
 474 static inline uint8_t to_bcd(uint8_t val)
 475 {
 476     return ((val / 10) << 4) | (val % 10);
 477 }
 478
 479 static inline uint8_t from_bcd(uint8_t val)
 480 {
 481     return ((val >> 4) * 10) + (val & 0x0f);
 482 }
 483
 484 /* compute with 96 bit intermediate result: (a*b)/c */
 485 #ifdef CONFIG_INT128
 486 static inline uint64_t muldiv64(uint64_t a, uint32_t b, uint32_t c)
 487 {
 488     return (__int128_t)a * b / c;
 489 }
 490 #else
 491 static inline uint64_t muldiv64(uint64_t a, uint32_t b, uint32_t c)
 492 {
 493     union {
 494         uint64_t ll;
 495         struct {
 496 #ifdef HOST_WORDS_BIGENDIAN
 497             uint32_t high, low;
 498 #else
 499             uint32_t low, high;
 500 #endif
 501         } l;
 502     } u, res;
 503     uint64_t rl, rh;
 504
 505     u.ll = a;
 506     rl = (uint64_t)u.l.low * (uint64_t)b;
 507     rh = (uint64_t)u.l.high * (uint64_t)b;
 508     rh += (rl >> 32);
 509     res.l.high = rh / c;
 510     res.l.low = (((rh % c) << 32) + (rl & 0xffffffff)) / c;
 511     return res.ll;
 512 }
 513 #endif
 514
 515 /* Round number down to multiple */
 516 #define QEMU_ALIGN_DOWN(n, m) ((n) / (m) * (m))
 517
 518 /* Round number up to multiple */
 519 #define QEMU_ALIGN_UP(n, m) QEMU_ALIGN_DOWN((n) + (m) - 1, (m))
 520
 521 static inline bool is_power_of_2(uint64_t value)
 522 {
 523     if (!value) {
 524         return 0;
 525     }
 526
 527     return !(value & (value - 1));
 528 }
 529
 530 /* round down to the nearest power of 2*/
 531 int64_t pow2floor(int64_t value);
 532
 533 /* round up to the nearest power of 2 (0 if overflow) */
 534 uint64_t pow2ceil(uint64_t value);
 535
 536 #include "qemu/module.h"
 537
 538 /*
 539  * Implementation of ULEB128 (http://en.wikipedia.org/wiki/LEB128)
 540  * Input is limited to 14-bit numbers
 541  */
 542
 543 int uleb128_encode_small(uint8_t *out, uint32_t n);
 544 int uleb128_decode_small(const uint8_t *in, uint32_t *n);
 545
 546 /* unicode.c */
 547 int mod_utf8_codepoint(const char *s, size_t n, char **end);
 548
 549 /*
 550  * Hexdump a buffer to a file. An optional string prefix is added to every line
 551  */
 552
 553 void qemu_hexdump(const char *buf, FILE *fp, const char *prefix, size_t size);
 554
 555 /* vector definitions */
 556 #ifdef __ALTIVEC__
 557 #include <altivec.h>
 558 /* The altivec.h header says we're allowed to undef these for
 559  * C++ compatibility.  Here we don't care about C++, but we
 560  * undef them anyway to avoid namespace pollution.
 561  */
 562 #undef vector
 563 #undef pixel
 564 #undef bool
 565 #define VECTYPE        __vector unsigned char
 566 #define SPLAT(p)       vec_splat(vec_ld(0, p), 0)
 567 #define ALL_EQ(v1, v2) vec_all_eq(v1, v2)
 568 #define VEC_OR(v1, v2) ((v1) | (v2))
 569 /* altivec.h may redefine the bool macro as vector type.
 570  * Reset it to POSIX semantics. */
 571 #define bool _Bool
 572 #elif defined __SSE2__
 573 #include <emmintrin.h>
 574 #define VECTYPE        __m128i
 575 #define SPLAT(p)       _mm_set1_epi8(*(p))
 576 #define ALL_EQ(v1, v2) (_mm_movemask_epi8(_mm_cmpeq_epi8(v1, v2)) == 0xFFFF)
 577 #define VEC_OR(v1, v2) (_mm_or_si128(v1, v2))
 578 #else
 579 #define VECTYPE        unsigned long
 580 #define SPLAT(p)       (*(p) * (~0UL / 255))
 581 #define ALL_EQ(v1, v2) ((v1) == (v2))
 582 #define VEC_OR(v1, v2) ((v1) | (v2))
 583 #endif
 584
 585 #define BUFFER_FIND_NONZERO_OFFSET_UNROLL_FACTOR 8
 586 static inline bool
 587 can_use_buffer_find_nonzero_offset(const void *buf, size_t len)
 588 {
 589     return (len % (BUFFER_FIND_NONZERO_OFFSET_UNROLL_FACTOR
 590                    * sizeof(VECTYPE)) == 0
 591             && ((uintptr_t) buf) % sizeof(VECTYPE) == 0);
 592 }
 593 size_t buffer_find_nonzero_offset(const void *buf, size_t len);
 594
 595 /*
 596  * helper to parse debug environment variables
 597  */
 598 int parse_debug_env(const char *name, int max, int initial);
 599
 600 const char *qemu_ether_ntoa(const MACAddr *mac);
 601
 602 #endif