/* nasm.h main header file for the Netwide Assembler: inter-module interface * * The Netwide Assembler is copyright (C) 1996 Simon Tatham and * Julian Hall. All rights reserved. The software is * redistributable under the licence given in the file "Licence" * distributed in the NASM archive. * * initial version: 27/iii/95 by Simon Tatham */ #ifndef YASM_NASM_H #define YASM_NASM_H #ifndef NULL #define NULL 0 #endif #ifndef FALSE #define FALSE 0 /* comes in handy */ #endif #ifndef TRUE #define TRUE 1 #endif #ifndef FILENAME_MAX #define FILENAME_MAX 256 #endif #ifndef PREFIX_MAX #define PREFIX_MAX 10 #endif #ifndef POSTFIX_MAX #define POSTFIX_MAX 10 #endif #define IDLEN_MAX 4096 /* * ------------------------- * Error reporting functions * ------------------------- */ /* * An error reporting function should look like this. */ typedef void (*efunc) (int severity, const char *fmt, ...); /* * 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 */ /* * These codes define specific types of suppressible warning. */ #define ERR_WARN_MASK 0x0000FF00 /* the mask for this feature */ #define ERR_WARN_SHR 8 /* how far to shift right */ #define ERR_WARN_MNP 0x00000100 /* macro-num-parameters warning */ #define ERR_WARN_MSR 0x00000200 /* macro self-reference */ #define ERR_WARN_OL 0x00000300 /* orphan label (no colon, and * alone on line) */ #define ERR_WARN_NOV 0x00000400 /* numeric overflow */ #define ERR_WARN_GNUELF 0x00000500 /* using GNU ELF extensions */ #define ERR_WARN_MAX 5 /* the highest numbered one */ /* * ----------------------- * Other function typedefs * ----------------------- */ /* * List-file generators should look like this: */ typedef struct { /* * Called to initialise the listing file generator. Before this * is called, the other routines will silently do nothing when * called. The `char *' parameter is the file name to write the * listing to. */ void (*init) (char *, efunc); /* * Called to clear stuff up and close the listing file. */ void (*cleanup) (void); /* * Called to output binary data. Parameters are: the offset; * the data; the data type. Data types are similar to the * output-format interface, only OUT_ADDRESS will _always_ be * displayed as if it's relocatable, so ensure that any non- * relocatable address has been converted to OUT_RAWDATA by * then. Note that OUT_RAWDATA+0 is a valid data type, and is a * dummy call used to give the listing generator an offset to * work with when doing things like uplevel(LIST_TIMES) or * uplevel(LIST_INCBIN). */ void (*output) (long, const void *, unsigned long); /* * Called to send a text line to the listing generator. The * `int' parameter is LIST_READ or LIST_MACRO depending on * whether the line came directly from an input file or is the * result of a multi-line macro expansion. */ void (*line) (int, char *); /* * Called to change one of the various levelled mechanisms in * the listing generator. LIST_INCLUDE and LIST_MACRO can be * used to increase the nesting level of include files and * macro expansions; LIST_TIMES and LIST_INCBIN switch on the * two binary-output-suppression mechanisms for large-scale * pseudo-instructions. * * LIST_MACRO_NOLIST is synonymous with LIST_MACRO except that * it indicates the beginning of the expansion of a `nolist' * macro, so anything under that level won't be expanded unless * it includes another file. */ void (*uplevel) (int); /* * Reverse the effects of uplevel. */ void (*downlevel) (int); } ListGen; /* * The expression evaluator must be passed a scanner function; a * standard scanner is provided as part of nasmlib.c. The * preprocessor will use a different one. Scanners, and the * token-value structures they return, look like this. * * The return value from the scanner is always a copy of the * `t_type' field in the structure. */ struct tokenval { int t_type; yasm_intnum *t_integer, *t_inttwo; char *t_charptr; }; typedef int (*scanner) (void *private_data, struct tokenval *tv); /* * Token types returned by the scanner, in addition to ordinary * ASCII character values, and zero for end-of-string. */ enum { /* token types, other than chars */ TOKEN_INVALID = -1, /* a placeholder value */ TOKEN_EOS = 0, /* end of string */ TOKEN_EQ = '=', TOKEN_GT = '>', TOKEN_LT = '<', /* aliases */ TOKEN_ID = 256, TOKEN_NUM, TOKEN_REG, TOKEN_INSN, /* major token types */ TOKEN_ERRNUM, /* numeric constant with error in */ TOKEN_HERE, TOKEN_BASE, /* $ and $$ */ TOKEN_SPECIAL, /* BYTE, WORD, DWORD, FAR, NEAR, etc */ TOKEN_PREFIX, /* A32, O16, LOCK, REPNZ, TIMES, etc */ TOKEN_SHL, TOKEN_SHR, /* << and >> */ TOKEN_SDIV, TOKEN_SMOD, /* // and %% */ TOKEN_GE, TOKEN_LE, TOKEN_NE, /* >=, <= and <> (!= is same as <>) */ TOKEN_DBL_AND, TOKEN_DBL_OR, TOKEN_DBL_XOR, /* &&, || and ^^ */ TOKEN_SEG, TOKEN_WRT, /* SEG and WRT */ TOKEN_FLOAT /* floating-point constant */ }; /* * The actual expression evaluator function looks like this. When * called, it expects the first token of its expression to already * be in `*tv'; if it is not, set tv->t_type to TOKEN_INVALID and * it will start by calling the scanner. * * `critical' is non-zero if the expression may not contain forward * references. The evaluator will report its own error if this * occurs; if `critical' is 1, the error will be "symbol not * defined before use", whereas if `critical' is 2, the error will * be "symbol undefined". * * If `critical' has bit 8 set (in addition to its main value: 0x101 * and 0x102 correspond to 1 and 2) then an extended expression * syntax is recognised, in which relational operators such as =, < * and >= are accepted, as well as low-precedence logical operators * &&, ^^ and ||. */ #define CRITICAL 0x100 typedef yasm_expr *(*evalfunc) (scanner sc, void *scprivate, struct tokenval *tv, int critical, efunc error); /* * Preprocessors ought to look like this: */ typedef struct { /* * Called at the start of a pass; given a file name, the number * of the pass, an error reporting function, an evaluator * function, and a listing generator to talk to. */ void (*reset) (FILE *, const char *, int, efunc, evalfunc, ListGen *); /* * Called to fetch a line of preprocessed source. The line * returned has been malloc'ed, and so should be freed after * use. */ char *(*getline) (void); /* * Called at the end of a pass. */ void (*cleanup) (int); } Preproc; /* * ---------------------------------------------------------------- * Some lexical properties of the NASM source language, included * here because they are shared between the parser and preprocessor * ---------------------------------------------------------------- */ /* * isidstart matches any character that may start an identifier, and isidchar * matches any character that may appear at places other than the start of an * identifier. E.g. a period may only appear at the start of an identifier * (for local labels), whereas a number may appear anywhere *but* at the * start. */ #define isidstart(c) ( isalpha(c) || (c)=='_' || (c)=='.' || (c)=='?' \ || (c)=='@' ) #define isidchar(c) ( isidstart(c) || isdigit(c) || (c)=='$' || (c)=='#' \ || (c)=='~' ) /* Ditto for numeric constants. */ #define isnumstart(c) ( isdigit(c) || (c)=='$' ) #define isnumchar(c) ( isalnum(c) ) /* This returns the numeric value of a given 'digit'. */ #define numvalue(c) ((c)>='a' ? (c)-'a'+10 : (c)>='A' ? (c)-'A'+10 : (c)-'0') /* * Data-type flags that get passed to listing-file routines. */ enum { LIST_READ, LIST_MACRO, LIST_MACRO_NOLIST, LIST_INCLUDE, LIST_INCBIN, LIST_TIMES }; /* * ----- * Other * ----- */ /* * This is a useful #define which I keep meaning to use more often: * the number of elements of a statically defined array. */ #define elements(x) ( sizeof(x) / sizeof(*(x)) ) extern int tasm_compatible_mode; extern int tasm_locals; extern const char *tasm_segment; const char *tasm_get_segment_register(const char *segment); #endif