nasmlib.h

   1 /* nasmlib.h    header file for nasmlib.c
   2  *
   3  * The Netwide Assembler is copyright (C) 1996 Simon Tatham and
   4  * Julian Hall. All rights reserved. The software is
   5  * redistributable under the license given in the file "LICENSE"
   6  * distributed in the NASM archive.
   7  */
   8
   9 #ifndef NASM_NASMLIB_H
  10 #define NASM_NASMLIB_H
  11
  12 #include "compiler.h"
  13
  14 #include <inttypes.h>
  15 #include <stdio.h>
  16 #include <string.h>
  17 #ifdef HAVE_STRINGS_H
  18 #include <strings.h>
  19 #endif
  20
  21 /*
  22  * If this is defined, the wrappers around malloc et al will
  23  * transform into logging variants, which will cause NASM to create
  24  * a file called `malloc.log' when run, and spew details of all its
  25  * memory management into that. That can then be analysed to detect
  26  * memory leaks and potentially other problems too.
  27  */
  28 /* #define LOGALLOC */
  29
  30 /*
  31  * -------------------------
  32  * Error reporting functions
  33  * -------------------------
  34  */
  35
  36 /*
  37  * An error reporting function should look like this.
  38  */
  39 typedef void (*efunc) (int severity, const char *fmt, ...);
  40 extern efunc nasm_malloc_error;
  41
  42 /*
  43  * These are the error severity codes which get passed as the first
  44  * argument to an efunc.
  45  */
  46
  47 #define ERR_DEBUG       0x00000008      /* put out debugging message */
  48 #define ERR_WARNING     0x00000000      /* warn only: no further action */
  49 #define ERR_NONFATAL    0x00000001      /* terminate assembly after phase */
  50 #define ERR_FATAL       0x00000002      /* instantly fatal: exit with error */
  51 #define ERR_PANIC       0x00000003      /* internal error: panic instantly
  52                                          * and dump core for reference */
  53 #define ERR_MASK        0x0000000F      /* mask off the above codes */
  54 #define ERR_NOFILE      0x00000010      /* don't give source file name/line */
  55 #define ERR_USAGE       0x00000020      /* print a usage message */
  56 #define ERR_PASS1       0x00000040      /* only print this error on pass one */
  57
  58 /*
  59  * These codes define specific types of suppressible warning.
  60  */
  61
  62 #define ERR_WARN_MASK   0x0000FF00      /* the mask for this feature */
  63 #define ERR_WARN_SHR  8                 /* how far to shift right */
  64
  65 #define WARN(x) ((x) << ERR_WARN_SHR)
  66
  67 #define ERR_WARN_MNP            WARN(1) /* macro-num-parameters warning */
  68 #define ERR_WARN_MSR            WARN(2) /* macro self-reference */
  69 #define ERR_WARN_OL             WARN(3) /* orphan label (no colon, and
  70                                          * alone on line) */
  71 #define ERR_WARN_NOV            WARN(4) /* numeric overflow */
  72 #define ERR_WARN_GNUELF         WARN(5) /* using GNU ELF extensions */
  73 #define ERR_WARN_FL_OVERFLOW    WARN(6) /* FP overflow */
  74 #define ERR_WARN_FL_DENORM      WARN(7) /* FP denormal */
  75 #define ERR_WARN_FL_UNDERFLOW   WARN(8) /* FP underflow */
  76 #define ERR_WARN_FL_TOOLONG     WARN(9) /* FP too many digits */
  77 #define ERR_WARN_MAX    9               /* the highest numbered one */
  78
  79 /*
  80  * Wrappers around malloc, realloc and free. nasm_malloc will
  81  * fatal-error and die rather than return NULL; nasm_realloc will
  82  * do likewise, and will also guarantee to work right on being
  83  * passed a NULL pointer; nasm_free will do nothing if it is passed
  84  * a NULL pointer.
  85  */
  86 void nasm_set_malloc_error(efunc);
  87 #ifndef LOGALLOC
  88 void *nasm_malloc(size_t);
  89 void *nasm_zalloc(size_t);
  90 void *nasm_realloc(void *, size_t);
  91 void nasm_free(void *);
  92 char *nasm_strdup(const char *);
  93 char *nasm_strndup(char *, size_t);
  94 #else
  95 void *nasm_malloc_log(char *, int, size_t);
  96 void *nasm_zalloc_log(char *, int, size_t);
  97 void *nasm_realloc_log(char *, int, void *, size_t);
  98 void nasm_free_log(char *, int, void *);
  99 char *nasm_strdup_log(char *, int, const char *);
 100 char *nasm_strndup_log(char *, int, char *, size_t);
 101 #define nasm_malloc(x) nasm_malloc_log(__FILE__,__LINE__,x)
 102 #define nasm_zalloc(x) nasm_zalloc_log(__FILE__,__LINE__,x)
 103 #define nasm_realloc(x,y) nasm_realloc_log(__FILE__,__LINE__,x,y)
 104 #define nasm_free(x) nasm_free_log(__FILE__,__LINE__,x)
 105 #define nasm_strdup(x) nasm_strdup_log(__FILE__,__LINE__,x)
 106 #define nasm_strndup(x,y) nasm_strndup_log(__FILE__,__LINE__,x,y)
 107 #endif
 108
 109 /*
 110  * ANSI doesn't guarantee the presence of `stricmp' or
 111  * `strcasecmp'.
 112  */
 113 #if defined(HAVE_STRCASECMP)
 114 #define nasm_stricmp strcasecmp
 115 #elif defined(HAVE_STRICMP)
 116 #define nasm_stricmp stricmp
 117 #else
 118 int nasm_stricmp(const char *, const char *);
 119 #endif
 120
 121 #if defined(HAVE_STRNCASECMP)
 122 #define nasm_strnicmp strncasecmp
 123 #elif defined(HAVE_STRNICMP)
 124 #define nasm_strnicmp strnicmp
 125 #else
 126 int nasm_strnicmp(const char *, const char *, size_t);
 127 #endif
 128
 129 int nasm_memicmp(const char *, const char *, size_t);
 130
 131 #if defined(HAVE_STRSEP)
 132 #define nasm_strsep strsep
 133 #else
 134 char *nasm_strsep(char **stringp, const char *delim);
 135 #endif
 136
 137
 138 /*
 139  * Convert a string into a number, using NASM number rules. Sets
 140  * `*error' to true if an error occurs, and false otherwise.
 141  */
 142 int64_t readnum(char *str, bool *error);
 143
 144 /*
 145  * Convert a character constant into a number. Sets
 146  * `*warn' to true if an overflow occurs, and false otherwise.
 147  * str points to and length covers the middle of the string,
 148  * without the quotes.
 149  */
 150 int64_t readstrnum(char *str, int length, bool *warn);
 151
 152 /*
 153  * seg_init: Initialise the segment-number allocator.
 154  * seg_alloc: allocate a hitherto unused segment number.
 155  */
 156 void seg_init(void);
 157 int32_t seg_alloc(void);
 158
 159 /*
 160  * many output formats will be able to make use of this: a standard
 161  * function to add an extension to the name of the input file
 162  */
 163 #ifdef NASM_NASM_H
 164 void standard_extension(char *inname, char *outname, char *extension,
 165                         efunc error);
 166 #endif
 167
 168 /*
 169  * Utility macros...
 170  *
 171  * This is a useful #define which I keep meaning to use more often:
 172  * the number of elements of a statically defined array.
 173  */
 174
 175 #define elements(x)     ( sizeof(x) / sizeof(*(x)) )
 176
 177
 178 /*
 179  * some handy macros that will probably be of use in more than one
 180  * output format: convert integers into little-endian byte packed
 181  * format in memory
 182  */
 183
 184 #if X86_MEMORY
 185
 186 #define WRITECHAR(p,v)                          \
 187     do {                                        \
 188         *(uint8_t *)(p) = (v);                  \
 189         (p) += 1;                               \
 190     } while (0)
 191
 192 #define WRITESHORT(p,v)                         \
 193     do {                                        \
 194         *(uint16_t *)(p) = (v);                 \
 195         (p) += 2;                               \
 196     } while (0)
 197
 198 #define WRITELONG(p,v)                          \
 199     do {                                        \
 200         *(uint32_t *)(p) = (v);                 \
 201         (p) += 4;                               \
 202     } while (0)
 203
 204 #define WRITEDLONG(p,v)                         \
 205     do {                                        \
 206         *(uint64_t *)(p) = (v);                 \
 207         (p) += 8;                               \
 208     } while (0)
 209
 210 #define WRITEADDR(p,v,s)                        \
 211     do {                                        \
 212         uint64_t _wa_v = (v);                   \
 213         memcpy((p), &_wa_v, (s));               \
 214         (p) += (s);                             \
 215     } while (0)
 216
 217 #else /* !X86_MEMORY */
 218
 219 #define WRITECHAR(p,v)                          \
 220     do {                                        \
 221         uint8_t *_wc_p = (uint8_t *)(p);        \
 222         uint8_t _wc_v = (v);                    \
 223         _wc_p[0] = _wc_v;                       \
 224         (p) = (void *)(_wc_p + 1);              \
 225     } while (0)
 226
 227 #define WRITESHORT(p,v)                         \
 228     do {                                        \
 229         uint8_t *_ws_p = (uint8_t *)(p);        \
 230         uint16_t _ws_v = (v);                   \
 231         _ws_p[0] = _ws_v;                       \
 232         _ws_p[1] = _ws_v >> 8;                  \
 233         (p) = (void *)(_ws_p + 2);              \
 234     } while (0)
 235
 236 #define WRITELONG(p,v)                          \
 237     do {                                        \
 238         uint8_t *_wl_p = (uint8_t *)(p);        \
 239         uint32_t _wl_v = (v);                   \
 240         _wl_p[0] = _wl_v;                       \
 241         _wl_p[1] = _wl_v >> 8;                  \
 242         _wl_p[2] = _wl_v >> 16;                 \
 243         _wl_p[3] = _wl_v >> 24;                 \
 244         (p) = (void *)(_wl_p + 4);              \
 245     } while (0)
 246
 247 #define WRITEDLONG(p,v)                         \
 248     do {                                        \
 249         uint8_t *_wq_p = (uint8_t *)(p);        \
 250         uint64_t _wq_v = (v);                   \
 251         _wq_p[0] = _wq_v;                       \
 252         _wq_p[1] = _wq_v >> 8;                  \
 253         _wq_p[2] = _wq_v >> 16;                 \
 254         _wq_p[3] = _wq_v >> 24;                 \
 255         _wq_p[4] = _wq_v >> 32;                 \
 256         _wq_p[5] = _wq_v >> 40;                 \
 257         _wq_p[6] = _wq_v >> 48;                 \
 258         _wq_p[7] = _wq_v >> 56;                 \
 259         (p) = (void *)(_wq_p + 8);              \
 260     } while (0)
 261
 262 #define WRITEADDR(p,v,s)                        \
 263     do {                                        \
 264         int _wa_s = (s);                        \
 265         uint64_t _wa_v = (v);                   \
 266         while (_wa_s--) {                       \
 267             WRITECHAR(p,_wa_v);                 \
 268             _wa_v >>= 8;                        \
 269         }                                       \
 270     } while(0)
 271
 272 #endif
 273
 274 /*
 275  * and routines to do the same thing to a file
 276  */
 277 #define fwriteint8_t(d,f) putc(d,f)
 278 void fwriteint16_t(uint16_t data, FILE * fp);
 279 void fwriteint32_t(uint32_t data, FILE * fp);
 280 void fwriteint64_t(uint64_t data, FILE * fp);
 281 void fwriteaddr(uint64_t data, int size, FILE * fp);
 282
 283 /*
 284  * Binary search routine. Returns index into `array' of an entry
 285  * matching `string', or <0 if no match. `array' is taken to
 286  * contain `size' elements.
 287  *
 288  * bsi() is case sensitive, bsii() is case insensitive.
 289  */
 290 int bsi(const char *string, const char **array, int size);
 291 int bsii(const char *string, const char **array, int size);
 292
 293 char *src_set_fname(char *newname);
 294 int32_t src_set_linnum(int32_t newline);
 295 int32_t src_get_linnum(void);
 296 /*
 297  * src_get may be used if you simply want to know the source file and line.
 298  * It is also used if you maintain private status about the source location
 299  * It return 0 if the information was the same as the last time you
 300  * checked, -1 if the name changed and (new-old) if just the line changed.
 301  */
 302 int src_get(int32_t *xline, char **xname);
 303
 304 char *nasm_strcat(char *one, char *two);
 305
 306 void null_debug_routine(const char *directive, const char *params);
 307 extern struct dfmt null_debug_form;
 308 extern struct dfmt *null_debug_arr[2];
 309
 310 const char *prefix_name(int);
 311
 312 #endif