/* ----------------------------------------------------------------------- * * * Copyright 1996-2016 The NASM Authors - All Rights Reserved * See the file AUTHORS included with the NASM distribution for * the specific copyright holders. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following * conditions are met: * * * Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * Redistributions in binary form must reproduce the above * copyright notice, this list of conditions and the following * disclaimer in the documentation and/or other materials provided * with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * * ----------------------------------------------------------------------- */ /* * nasmlib.h header file for nasmlib.c */ #ifndef NASM_NASMLIB_H #define NASM_NASMLIB_H #include "compiler.h" #include #include #include #ifdef HAVE_STRINGS_H #include #endif /* * tolower table -- avoids a function call on some platforms. * NOTE: unlike the tolower() function in ctype, EOF is *NOT* * a permitted value, for obvious reasons. */ void tolower_init(void); extern unsigned char nasm_tolower_tab[256]; #define nasm_tolower(x) nasm_tolower_tab[(unsigned char)(x)] /* Wrappers around functions */ /* These are only valid for values that cannot include EOF */ #define nasm_isspace(x) isspace((unsigned char)(x)) #define nasm_isalpha(x) isalpha((unsigned char)(x)) #define nasm_isdigit(x) isdigit((unsigned char)(x)) #define nasm_isalnum(x) isalnum((unsigned char)(x)) #define nasm_isxdigit(x) isxdigit((unsigned char)(x)) /* * ------------------------- * Error reporting functions * ------------------------- */ /* * An error reporting function should look like this. */ typedef void (*efunc) (int severity, const char *fmt, ...); typedef void (*vefunc) (int severity, const char *fmt, va_list ap); void printf_func(2, 3) nasm_error(int severity, const char *fmt, ...); void nasm_set_verror(vefunc); no_return printf_func(2, 3) nasm_panic(int flags, const char *fmt, ...); no_return nasm_panic_from_macro(const char *file, int line); #define panic() nasm_panic_from_macro(__FILE__, __LINE__); /* * These are the error severity codes which get passed as the first * argument to an efunc. */ #define ERR_DEBUG 0x00000008 /* put out debugging message */ #define ERR_WARNING 0x00000000 /* warn only: no further action */ #define ERR_NONFATAL 0x00000001 /* terminate assembly after phase */ #define ERR_FATAL 0x00000002 /* instantly fatal: exit with error */ #define ERR_PANIC 0x00000003 /* internal error: panic instantly * and dump core for reference */ #define ERR_MASK 0x0000000F /* mask off the above codes */ #define ERR_NOFILE 0x00000010 /* don't give source file name/line */ #define ERR_USAGE 0x00000020 /* print a usage message */ #define ERR_PASS1 0x00000040 /* only print this error on pass one */ #define ERR_PASS2 0x00000080 #define ERR_NO_SEVERITY 0x00000100 /* suppress printing severity */ /* * These codes define specific types of suppressible warning. */ #define ERR_WARN_MASK 0xFFFFF000 /* the mask for this feature */ #define ERR_WARN_SHR 12 /* how far to shift right */ #define WARN(x) ((x) << ERR_WARN_SHR) #define WARN_IDX(x) (((x) & ERR_WARN_MASK) >> ERR_WARN_SHR) #define ERR_WARN_TERM WARN( 0) /* treat warnings as errors */ #define ERR_WARN_MNP WARN( 1) /* macro-num-parameters warning */ #define ERR_WARN_MSR WARN( 2) /* macro self-reference */ #define ERR_WARN_MDP WARN( 3) /* macro default parameters check */ #define ERR_WARN_OL WARN( 4) /* orphan label (no colon, and * alone on line) */ #define ERR_WARN_NOV WARN( 5) /* numeric overflow */ #define ERR_WARN_GNUELF WARN( 6) /* using GNU ELF extensions */ #define ERR_WARN_FL_OVERFLOW WARN( 7) /* FP overflow */ #define ERR_WARN_FL_DENORM WARN( 8) /* FP denormal */ #define ERR_WARN_FL_UNDERFLOW WARN( 9) /* FP underflow */ #define ERR_WARN_FL_TOOLONG WARN(10) /* FP too many digits */ #define ERR_WARN_USER WARN(11) /* %warning directives */ #define ERR_WARN_LOCK WARN(12) /* bad LOCK prefixes */ #define ERR_WARN_HLE WARN(13) /* bad HLE prefixes */ #define ERR_WARN_BND WARN(14) /* bad BND prefixes */ #define ERR_WARN_ZEXTRELOC WARN(15) /* relocation zero-extended */ #define ERR_WARN_MAX 15 /* the highest numbered one */ /* * Wrappers around malloc, realloc and free. nasm_malloc will * fatal-error and die rather than return NULL; nasm_realloc will * do likewise, and will also guarantee to work right on being * passed a NULL pointer; nasm_free will do nothing if it is passed * a NULL pointer. */ void *nasm_malloc(size_t); void *nasm_zalloc(size_t); void *nasm_realloc(void *, size_t); void nasm_free(void *); char *nasm_strdup(const char *); char *nasm_strndup(const char *, size_t); /* * Wrapper around fwrite() which fatal-errors on output failure. */ void nasm_write(const void *, size_t, FILE *); /* * NASM assert failure */ no_return nasm_assert_failed(const char *, int, const char *); #define nasm_assert(x) \ do { \ if (unlikely(!(x))) \ nasm_assert_failed(__FILE__,__LINE__,#x); \ } while (0) /* * NASM failure at build time if x != 0 */ #define nasm_build_assert(x) (void)(sizeof(char[1-2*!!(x)])) /* * ANSI doesn't guarantee the presence of `stricmp' or * `strcasecmp'. */ #if defined(HAVE_STRCASECMP) #define nasm_stricmp strcasecmp #elif defined(HAVE_STRICMP) #define nasm_stricmp stricmp #else int nasm_stricmp(const char *, const char *); #endif #if defined(HAVE_STRNCASECMP) #define nasm_strnicmp strncasecmp #elif defined(HAVE_STRNICMP) #define nasm_strnicmp strnicmp #else int nasm_strnicmp(const char *, const char *, size_t); #endif int nasm_memicmp(const char *, const char *, size_t); #if defined(HAVE_STRSEP) #define nasm_strsep strsep #else char *nasm_strsep(char **stringp, const char *delim); #endif /* This returns the numeric value of a given 'digit'. */ #define numvalue(c) ((c) >= 'a' ? (c) - 'a' + 10 : (c) >= 'A' ? (c) - 'A' + 10 : (c) - '0') /* * Convert a string into a number, using NASM number rules. Sets * `*error' to true if an error occurs, and false otherwise. */ int64_t readnum(char *str, bool *error); /* * Convert a character constant into a number. Sets * `*warn' to true if an overflow occurs, and false otherwise. * str points to and length covers the middle of the string, * without the quotes. */ int64_t readstrnum(char *str, int length, bool *warn); /* * seg_init: Initialise the segment-number allocator. * seg_alloc: allocate a hitherto unused segment number. */ void seg_init(void); int32_t seg_alloc(void); /* * many output formats will be able to make use of this: a standard * function to add an extension to the name of the input file */ void standard_extension(char *inname, char *outname, char *extension); /* * Utility macros... * * This is a useful #define which I keep meaning to use more often: * the number of elements of a statically defined array. */ #define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0])) /* * List handling * * list_for_each - regular iterator over list * list_for_each_safe - the same but safe against list items removal * list_last - find the last element in a list */ #define list_for_each(pos, head) \ for (pos = head; pos; pos = pos->next) #define list_for_each_safe(pos, n, head) \ for (pos = head, n = (pos ? pos->next : NULL); pos; \ pos = n, n = (n ? n->next : NULL)) #define list_last(pos, head) \ for (pos = head; pos && pos->next; pos = pos->next) \ ; #define list_reverse(head, prev, next) \ do { \ if (!head || !head->next) \ break; \ prev = NULL; \ while (head) { \ next = head->next; \ head->next = prev; \ prev = head; \ head = next; \ } \ head = prev; \ } while (0) /* * Power of 2 align helpers */ #undef ALIGN_MASK /* Some BSD flavors define these in system headers */ #undef ALIGN #define ALIGN_MASK(v, mask) (((v) + (mask)) & ~(mask)) #define ALIGN(v, a) ALIGN_MASK(v, (a) - 1) #define IS_ALIGNED(v, a) (((v) & ((a) - 1)) == 0) /* * some handy macros that will probably be of use in more than one * output format: convert integers into little-endian byte packed * format in memory */ #if X86_MEMORY #define WRITECHAR(p,v) \ do { \ *(uint8_t *)(p) = (v); \ (p) += 1; \ } while (0) #define WRITESHORT(p,v) \ do { \ *(uint16_t *)(p) = (v); \ (p) += 2; \ } while (0) #define WRITELONG(p,v) \ do { \ *(uint32_t *)(p) = (v); \ (p) += 4; \ } while (0) #define WRITEDLONG(p,v) \ do { \ *(uint64_t *)(p) = (v); \ (p) += 8; \ } while (0) #define WRITEADDR(p,v,s) \ do { \ uint64_t _wa_v = (v); \ memcpy((p), &_wa_v, (s)); \ (p) += (s); \ } while (0) #else /* !X86_MEMORY */ #define WRITECHAR(p,v) \ do { \ uint8_t *_wc_p = (uint8_t *)(p); \ uint8_t _wc_v = (v); \ _wc_p[0] = _wc_v; \ (p) = (void *)(_wc_p + 1); \ } while (0) #define WRITESHORT(p,v) \ do { \ uint8_t *_ws_p = (uint8_t *)(p); \ uint16_t _ws_v = (v); \ _ws_p[0] = _ws_v; \ _ws_p[1] = _ws_v >> 8; \ (p) = (void *)(_ws_p + 2); \ } while (0) #define WRITELONG(p,v) \ do { \ uint8_t *_wl_p = (uint8_t *)(p); \ uint32_t _wl_v = (v); \ _wl_p[0] = _wl_v; \ _wl_p[1] = _wl_v >> 8; \ _wl_p[2] = _wl_v >> 16; \ _wl_p[3] = _wl_v >> 24; \ (p) = (void *)(_wl_p + 4); \ } while (0) #define WRITEDLONG(p,v) \ do { \ uint8_t *_wq_p = (uint8_t *)(p); \ uint64_t _wq_v = (v); \ _wq_p[0] = _wq_v; \ _wq_p[1] = _wq_v >> 8; \ _wq_p[2] = _wq_v >> 16; \ _wq_p[3] = _wq_v >> 24; \ _wq_p[4] = _wq_v >> 32; \ _wq_p[5] = _wq_v >> 40; \ _wq_p[6] = _wq_v >> 48; \ _wq_p[7] = _wq_v >> 56; \ (p) = (void *)(_wq_p + 8); \ } while (0) #define WRITEADDR(p,v,s) \ do { \ int _wa_s = (s); \ uint64_t _wa_v = (v); \ while (_wa_s--) { \ WRITECHAR(p,_wa_v); \ _wa_v >>= 8; \ } \ } while(0) #endif /* * and routines to do the same thing to a file */ #define fwriteint8_t(d,f) putc(d,f) void fwriteint16_t(uint16_t data, FILE * fp); void fwriteint32_t(uint32_t data, FILE * fp); void fwriteint64_t(uint64_t data, FILE * fp); void fwriteaddr(uint64_t data, int size, FILE * fp); /* * Binary search routine. Returns index into `array' of an entry * matching `string', or <0 if no match. `array' is taken to * contain `size' elements. * * bsi() is case sensitive, bsii() is case insensitive. */ int bsi(const char *string, const char **array, int size); int bsii(const char *string, const char **array, int size); char *src_set_fname(char *newname); int32_t src_set_linnum(int32_t newline); int32_t src_get_linnum(void); /* * src_get may be used if you simply want to know the source file and line. * It is also used if you maintain private status about the source location * It return 0 if the information was the same as the last time you * checked, -1 if the name changed and (new-old) if just the line changed. */ int src_get(int32_t *xline, char **xname); char *nasm_strcat(const char *one, const char *two); char *nasm_skip_spaces(const char *p); char *nasm_skip_word(const char *p); char *nasm_zap_spaces_fwd(char *p); char *nasm_zap_spaces_rev(char *p); char *nasm_trim_spaces(char *p); char *nasm_get_word(char *p, char **tail); char *nasm_opt_val(char *p, char **opt, char **val); /* * Converts a relative pathname rel_path into an absolute path name. * * The buffer returned must be freed by the caller */ char *nasm_realpath(const char *rel_path); const char *prefix_name(int); #define ZERO_BUF_SIZE 4096 /* Default value */ #if defined(BUFSIZ) && (BUFSIZ > ZERO_BUF_SIZE) # undef ZERO_BUF_SIZE # define ZERO_BUF_SIZE BUFSIZ #endif extern const uint8_t zero_buffer[ZERO_BUF_SIZE]; void fwritezero(size_t bytes, FILE *fp); static inline bool overflow_general(int64_t value, int bytes) { int sbit; int64_t vmax, vmin; if (bytes >= 8) return false; sbit = (bytes << 3) - 1; vmax = ((int64_t)2 << sbit) - 1; vmin = -((int64_t)1 << sbit); return value < vmin || value > vmax; } static inline bool overflow_signed(int64_t value, int bytes) { int sbit; int64_t vmax, vmin; if (bytes >= 8) return false; sbit = (bytes << 3) - 1; vmax = ((int64_t)1 << sbit) - 1; vmin = -((int64_t)1 << sbit); return value < vmin || value > vmax; } static inline bool overflow_unsigned(int64_t value, int bytes) { int sbit; int64_t vmax, vmin; if (bytes >= 8) return false; sbit = (bytes << 3) - 1; vmax = ((int64_t)2 << sbit) - 1; vmin = 0; return value < vmin || value > vmax; } static inline int64_t signed_bits(int64_t value, int bits) { if (bits < 64) { value &= ((int64_t)1 << bits) - 1; if (value & (int64_t)1 << (bits - 1)) value |= (int64_t)((uint64_t)-1 << bits); } return value; } int idata_bytes(int opcode); /* check if value is power of 2 */ #define is_power2(v) ((v) && ((v) & ((v) - 1)) == 0) /* * floor(log2(v)) */ int ilog2_32(uint32_t v); int ilog2_64(uint64_t v); /* * v == 0 ? 0 : is_power2(x) ? ilog2_X(v) : -1 */ int alignlog2_32(uint32_t v); int alignlog2_64(uint64_t v); #endif