nasm.h
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上传日期:2007-01-08
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文件大小:31k
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编译器/解释器
开发平台:
C/C++
- /* 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 NASM_NASM_H
- #define NASM_NASM_H
- #define NASM_MAJOR_VER 0
- #define NASM_MINOR_VER 98
- #define NASM_VER "0.98"
- #ifndef NULL
- #define NULL 0
- #endif
- #ifndef FALSE
- #define FALSE 0 /* comes in handy */
- #endif
- #ifndef TRUE
- #define TRUE 1
- #endif
- #define NO_SEG -1L /* null segment value */
- #define SEG_ABS 0x40000000L /* mask for far-absolute segments */
- #ifndef FILENAME_MAX
- #define FILENAME_MAX 256
- #endif
- /*
- * Name pollution problems: <time.h> on Digital UNIX pulls in some
- * strange hardware header file which sees fit to define R_SP. We
- * undefine it here so as not to break the enum below.
- */
- #ifdef R_SP
- #undef R_SP
- #endif
- /*
- * We must declare the existence of this structure type up here,
- * since we have to reference it before we define it...
- */
- struct ofmt;
- /*
- * -------------------------
- * Error reporting functions
- * -------------------------
- */
- /*
- * An error reporting function should look like this.
- */
- typedef void (*efunc) (int severity, char *fmt, ...);
- /*
- * These are the error severity codes which get passed as the first
- * argument to an efunc.
- */
- #define ERR_WARNING 0 /* warn only: no further action */
- #define ERR_NONFATAL 1 /* terminate assembly after phase */
- #define ERR_FATAL 2 /* instantly fatal: exit with error */
- #define ERR_PANIC 3 /* internal error: panic instantly
- * and dump core for reference */
- #define ERR_MASK 0x0F /* mask off the above codes */
- #define ERR_NOFILE 0x10 /* don't give source file name/line */
- #define ERR_USAGE 0x20 /* print a usage message */
- #define ERR_PASS1 0x80 /* only print this error on pass one */
- /*
- * These codes define specific types of suppressible warning.
- */
- #define ERR_WARN_MNP 0x0100 /* macro-num-parameters warning */
- #define ERR_WARN_OL 0x0200 /* orphan label (no colon, and
- * alone on line) */
- #define ERR_WARN_NOV 0x0300 /* numeric overflow */
- #define ERR_WARN_MASK 0xFF00 /* the mask for this feature */
- #define ERR_WARN_SHR 8 /* how far to shift right */
- #define ERR_WARN_MAX 3 /* the highest numbered one */
- /*
- * -----------------------
- * Other function typedefs
- * -----------------------
- */
- /*
- * A label-lookup function should look like this.
- */
- typedef int (*lfunc) (char *label, long *segment, long *offset);
- /*
- * And a label-definition function like this. The boolean parameter
- * `is_norm' states whether the label is a `normal' label (which
- * should affect the local-label system), or something odder like
- * an EQU or a segment-base symbol, which shouldn't.
- */
- typedef void (*ldfunc) (char *label, long segment, long offset, char *special,
- int is_norm, int isextrn, struct ofmt *ofmt,
- efunc error);
- /*
- * 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, 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;
- long 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 */
- };
- typedef struct {
- long segment;
- long offset;
- int known;
- } loc_t;
- /*
- * Expression-evaluator datatype. Expressions, within the
- * evaluator, are stored as an array of these beasts, terminated by
- * a record with type==0. Mostly, it's a vector type: each type
- * denotes some kind of a component, and the value denotes the
- * multiple of that component present in the expression. The
- * exception is the WRT type, whose `value' field denotes the
- * segment to which the expression is relative. These segments will
- * be segment-base types, i.e. either odd segment values or SEG_ABS
- * types. So it is still valid to assume that anything with a
- * `value' field of zero is insignificant.
- */
- typedef struct {
- long type; /* a register, or EXPR_xxx */
- long value; /* must be >= 32 bits */
- } expr;
- /*
- * The evaluator can also return hints about which of two registers
- * used in an expression should be the base register. See also the
- * `operand' structure.
- */
- struct eval_hints {
- int base;
- int type;
- };
- /*
- * 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.
- *
- * If a forward reference happens during evaluation, the evaluator
- * must set `*fwref' to TRUE if `fwref' is non-NULL.
- *
- * `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 4 set (in addition to its main value: 0x11
- * and 0x12 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 ||.
- *
- * If `hints' is non-NULL, it gets filled in with some hints as to
- * the base register in complex effective addresses.
- */
- typedef expr *(*evalfunc) (scanner sc, void *scprivate, struct tokenval *tv,
- int *fwref, int critical, efunc error,
- struct eval_hints *hints);
- /*
- * Special values for expr->type. ASSUMPTION MADE HERE: the number
- * of distinct register names (i.e. possible "type" fields for an
- * expr structure) does not exceed 124 (EXPR_REG_START through
- * EXPR_REG_END).
- */
- #define EXPR_REG_START 1
- #define EXPR_REG_END 124
- #define EXPR_UNKNOWN 125L /* for forward references */
- #define EXPR_SIMPLE 126L
- #define EXPR_WRT 127L
- #define EXPR_SEGBASE 128L
- /*
- * 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) (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) (void);
- } 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
- };
- /*
- * -----------------------------------------------------------
- * Format of the `insn' structure returned from `parser.c' and
- * passed into `assemble.c'
- * -----------------------------------------------------------
- */
- /*
- * Here we define the operand types. These are implemented as bit
- * masks, since some are subsets of others; e.g. AX in a MOV
- * instruction is a special operand type, whereas AX in other
- * contexts is just another 16-bit register. (Also, consider CL in
- * shift instructions, DX in OUT, etc.)
- */
- /* size, and other attributes, of the operand */
- #define BITS8 0x00000001L
- #define BITS16 0x00000002L
- #define BITS32 0x00000004L
- #define BITS64 0x00000008L /* FPU only */
- #define BITS80 0x00000010L /* FPU only */
- #define FAR 0x00000020L /* grotty: this means 16:16 or */
- /* 16:32, like in CALL/JMP */
- #define NEAR 0x00000040L
- #define SHORT 0x00000080L /* and this means what it says :) */
- #define SIZE_MASK 0x000000FFL /* all the size attributes */
- #define NON_SIZE (~SIZE_MASK)
- #define TO 0x00000100L /* reverse effect in FADD, FSUB &c */
- #define COLON 0x00000200L /* operand is followed by a colon */
- /* type of operand: memory reference, register, etc. */
- #define MEMORY 0x00204000L
- #define REGISTER 0x00001000L /* register number in 'basereg' */
- #define IMMEDIATE 0x00002000L
- #define REGMEM 0x00200000L /* for r/m, ie EA, operands */
- #define REGNORM 0x00201000L /* 'normal' reg, qualifies as EA */
- #define REG8 0x00201001L
- #define REG16 0x00201002L
- #define REG32 0x00201004L
- #define MMXREG 0x00201008L /* MMX registers */
- #define XMMREG 0x00201010L /* XMM Katmai reg */
- #define FPUREG 0x01000000L /* floating point stack registers */
- #define FPU0 0x01000800L /* FPU stack register zero */
- /* special register operands: these may be treated differently */
- #define REG_SMASK 0x00070000L /* a mask for the following */
- #define REG_ACCUM 0x00211000L /* accumulator: AL, AX or EAX */
- #define REG_AL 0x00211001L /* REG_ACCUM | BITSxx */
- #define REG_AX 0x00211002L /* ditto */
- #define REG_EAX 0x00211004L /* and again */
- #define REG_COUNT 0x00221000L /* counter: CL, CX or ECX */
- #define REG_CL 0x00221001L /* REG_COUNT | BITSxx */
- #define REG_CX 0x00221002L /* ditto */
- #define REG_ECX 0x00221004L /* another one */
- #define REG_DX 0x00241002L
- #define REG_SREG 0x00081002L /* any segment register */
- #define REG_CS 0x01081002L /* CS */
- #define REG_DESS 0x02081002L /* DS, ES, SS (non-CS 86 registers) */
- #define REG_FSGS 0x04081002L /* FS, GS (386 extended registers) */
- #define REG_CDT 0x00101004L /* CRn, DRn and TRn */
- #define REG_CREG 0x08101004L /* CRn */
- #define REG_CR4 0x08101404L /* CR4 (Pentium only) */
- #define REG_DREG 0x10101004L /* DRn */
- #define REG_TREG 0x20101004L /* TRn */
- /* special type of EA */
- #define MEM_OFFS 0x00604000L /* simple [address] offset */
- /* special type of immediate operand */
- #define ONENESS 0x00800000L /* so UNITY == IMMEDIATE | ONENESS */
- #define UNITY 0x00802000L /* for shift/rotate instructions */
- /*
- * Next, the codes returned from the parser, for registers and
- * instructions.
- */
- enum { /* register names */
- R_AH = EXPR_REG_START, R_AL, R_AX, R_BH, R_BL, R_BP, R_BX, R_CH,
- R_CL, R_CR0, R_CR2, R_CR3, R_CR4, R_CS, R_CX, R_DH, R_DI, R_DL,
- R_DR0, R_DR1, R_DR2, R_DR3, R_DR6, R_DR7, R_DS, R_DX, R_EAX,
- R_EBP, R_EBX, R_ECX, R_EDI, R_EDX, R_ES, R_ESI, R_ESP, R_FS,
- R_GS, R_MM0, R_MM1, R_MM2, R_MM3, R_MM4, R_MM5, R_MM6, R_MM7,
- R_SI, R_SP, R_SS, R_ST0, R_ST1, R_ST2, R_ST3, R_ST4, R_ST5,
- R_ST6, R_ST7, R_TR3, R_TR4, R_TR5, R_TR6, R_TR7,
- R_XMM0, R_XMM1, R_XMM2, R_XMM3, R_XMM4, R_XMM5, R_XMM6, R_XMM7, REG_ENUM_LIMIT
- };
- /* Instruction names automatically generated from insns.dat */
- #include "insnsi.h"
- /* max length of any instruction, register name etc. */
- #if MAX_INSLEN > 9
- #define MAX_KEYWORD MAX_INSLEN
- #else
- #define MAX_KEYWORD 9
- #endif
- enum { /* condition code names */
- C_A, C_AE, C_B, C_BE, C_C, C_E, C_G, C_GE, C_L, C_LE, C_NA, C_NAE,
- C_NB, C_NBE, C_NC, C_NE, C_NG, C_NGE, C_NL, C_NLE, C_NO, C_NP,
- C_NS, C_NZ, C_O, C_P, C_PE, C_PO, C_S, C_Z
- };
- /*
- * Note that because segment registers may be used as instruction
- * prefixes, we must ensure the enumerations for prefixes and
- * register names do not overlap.
- */
- enum { /* instruction prefixes */
- PREFIX_ENUM_START = REG_ENUM_LIMIT,
- P_A16 = PREFIX_ENUM_START, P_A32, P_LOCK, P_O16, P_O32, P_REP, P_REPE,
- P_REPNE, P_REPNZ, P_REPZ, P_TIMES
- };
- enum { /* extended operand types */
- EOT_NOTHING, EOT_DB_STRING, EOT_DB_NUMBER
- };
- enum { /* special EA flags */
- EAF_BYTEOFFS = 1, /* force offset part to byte size */
- EAF_WORDOFFS = 2, /* force offset part to [d]word size */
- EAF_TIMESTWO = 4 /* really do EAX*2 not EAX+EAX */
- };
- enum { /* values for `hinttype' */
- EAH_NOHINT = 0, /* no hint at all - our discretion */
- EAH_MAKEBASE = 1, /* try to make given reg the base */
- EAH_NOTBASE = 2 /* try _not_ to make reg the base */
- };
- typedef struct { /* operand to an instruction */
- long type; /* type of operand */
- int addr_size; /* 0 means default; 16; 32 */
- int basereg, indexreg, scale; /* registers and scale involved */
- int hintbase, hinttype; /* hint as to real base register */
- long segment; /* immediate segment, if needed */
- long offset; /* any immediate number */
- long wrt; /* segment base it's relative to */
- int eaflags; /* special EA flags */
- int opflags; /* see OPFLAG_* defines below */
- } operand;
- #define OPFLAG_FORWARD 1 /* operand is a forward reference */
- #define OPFLAG_EXTERN 2 /* operand is an external reference */
- typedef struct extop { /* extended operand */
- struct extop *next; /* linked list */
- long type; /* defined above */
- char *stringval; /* if it's a string, then here it is */
- int stringlen; /* ... and here's how long it is */
- long segment; /* if it's a number/address, then... */
- long offset; /* ... it's given here ... */
- long wrt; /* ... and here */
- } extop;
- #define MAXPREFIX 4
- typedef struct { /* an instruction itself */
- char *label; /* the label defined, or NULL */
- int prefixes[MAXPREFIX]; /* instruction prefixes, if any */
- int nprefix; /* number of entries in above */
- int opcode; /* the opcode - not just the string */
- int condition; /* the condition code, if Jcc/SETcc */
- int operands; /* how many operands? 0-3
- * (more if db et al) */
- operand oprs[3]; /* the operands, defined as above */
- extop *eops; /* extended operands */
- int eops_float; /* true if DD and floating */
- long times; /* repeat count (TIMES prefix) */
- int forw_ref; /* is there a forward reference? */
- } insn;
- enum geninfo { GI_SWITCH };
- /*
- * ------------------------------------------------------------
- * The data structure defining an output format driver, and the
- * interfaces to the functions therein.
- * ------------------------------------------------------------
- */
- struct ofmt {
- /*
- * This is a short (one-liner) description of the type of
- * output generated by the driver.
- */
- char *fullname;
- /*
- * This is a single keyword used to select the driver.
- */
- char *shortname;
- /*
- * this is reserved for out module specific help.
- * It is set to NULL in all the out modules but is not implemented
- * in the main program
- */
- char *helpstring;
- /*
- * this is a pointer to the first element of the debug information
- */
- struct dfmt **debug_formats;
- /*
- * and a pointer to the element that is being used
- * note: this is set to the default at compile time and changed if the
- * -F option is selected. If developing a set of new debug formats for
- * an output format, be sure to set this to whatever default you want
- *
- */
- struct dfmt *current_dfmt;
- /*
- * This, if non-NULL, is a NULL-terminated list of `char *'s
- * pointing to extra standard macros supplied by the object
- * format (e.g. a sensible initial default value of __SECT__,
- * and user-level equivalents for any format-specific
- * directives).
- */
- char **stdmac;
- /*
- * This procedure is called at the start of an output session.
- * It tells the output format what file it will be writing to,
- * what routine to report errors through, and how to interface
- * to the label manager and expression evaluator if necessary.
- * It also gives it a chance to do other initialisation.
- */
- void (*init) (FILE *fp, efunc error, ldfunc ldef, evalfunc eval);
- /*
- * This procedure is called to pass generic information to the
- * object file. The first parameter gives the information type
- * (currently only command line switches)
- * and the second parameter gives the value. This function returns
- * 1 if recognized, 0 if unrecognized
- */
- int (*setinfo)(enum geninfo type, char **string);
- /*
- * This procedure is called by assemble() to write actual
- * generated code or data to the object file. Typically it
- * doesn't have to actually _write_ it, just store it for
- * later.
- *
- * The `type' argument specifies the type of output data, and
- * usually the size as well: its contents are described below.
- */
- void (*output) (long segto, void *data, unsigned long type,
- long segment, long wrt);
- /*
- * This procedure is called once for every symbol defined in
- * the module being assembled. It gives the name and value of
- * the symbol, in NASM's terms, and indicates whether it has
- * been declared to be global. Note that the parameter "name",
- * when passed, will point to a piece of static storage
- * allocated inside the label manager - it's safe to keep using
- * that pointer, because the label manager doesn't clean up
- * until after the output driver has.
- *
- * Values of `is_global' are: 0 means the symbol is local; 1
- * means the symbol is global; 2 means the symbol is common (in
- * which case `offset' holds the _size_ of the variable).
- * Anything else is available for the output driver to use
- * internally.
- *
- * This routine explicitly _is_ allowed to call the label
- * manager to define further symbols, if it wants to, even
- * though it's been called _from_ the label manager. That much
- * re-entrancy is guaranteed in the label manager. However, the
- * label manager will in turn call this routine, so it should
- * be prepared to be re-entrant itself.
- *
- * The `special' parameter contains special information passed
- * through from the command that defined the label: it may have
- * been an EXTERN, a COMMON or a GLOBAL. The distinction should
- * be obvious to the output format from the other parameters.
- */
- void (*symdef) (char *name, long segment, long offset, int is_global,
- char *special);
- /*
- * This procedure is called when the source code requests a
- * segment change. It should return the corresponding segment
- * _number_ for the name, or NO_SEG if the name is not a valid
- * segment name.
- *
- * It may also be called with NULL, in which case it is to
- * return the _default_ section number for starting assembly in.
- *
- * It is allowed to modify the string it is given a pointer to.
- *
- * It is also allowed to specify a default instruction size for
- * the segment, by setting `*bits' to 16 or 32. Or, if it
- * doesn't wish to define a default, it can leave `bits' alone.
- */
- long (*section) (char *name, int pass, int *bits);
- /*
- * This procedure is called to modify the segment base values
- * returned from the SEG operator. It is given a segment base
- * value (i.e. a segment value with the low bit set), and is
- * required to produce in return a segment value which may be
- * different. It can map segment bases to absolute numbers by
- * means of returning SEG_ABS types.
- *
- * It should return NO_SEG if the segment base cannot be
- * determined; the evaluator (which calls this routine) is
- * responsible for throwing an error condition if that occurs
- * in pass two or in a critical expression.
- */
- long (*segbase) (long segment);
- /*
- * This procedure is called to allow the output driver to
- * process its own specific directives. When called, it has the
- * directive word in `directive' and the parameter string in
- * `value'. It is called in both assembly passes, and `pass'
- * will be either 1 or 2.
- *
- * This procedure should return zero if it does not _recognise_
- * the directive, so that the main program can report an error.
- * If it recognises the directive but then has its own errors,
- * it should report them itself and then return non-zero. It
- * should also return non-zero if it correctly processes the
- * directive.
- */
- int (*directive) (char *directive, char *value, int pass);
- /*
- * This procedure is called before anything else - even before
- * the "init" routine - and is passed the name of the input
- * file from which this output file is being generated. It
- * should return its preferred name for the output file in
- * `outname', if outname[0] is not ' ', and do nothing to
- * `outname' otherwise. Since it is called before the driver is
- * properly initialised, it has to be passed its error handler
- * separately.
- *
- * This procedure may also take its own copy of the input file
- * name for use in writing the output file: it is _guaranteed_
- * that it will be called before the "init" routine.
- *
- * The parameter `outname' points to an area of storage
- * guaranteed to be at least FILENAME_MAX in size.
- */
- void (*filename) (char *inname, char *outname, efunc error);
- /*
- * This procedure is called after assembly finishes, to allow
- * the output driver to clean itself up and free its memory.
- * Typically, it will also be the point at which the object
- * file actually gets _written_.
- *
- * One thing the cleanup routine should always do is to close
- * the output file pointer.
- */
- void (*cleanup) (int debuginfo);
- };
- /*
- * values for the `type' parameter to an output function. Each one
- * must have the actual number of _bytes_ added to it.
- *
- * Exceptions are OUT_RELxADR, which denote an x-byte relocation
- * which will be a relative jump. For this we need to know the
- * distance in bytes from the start of the relocated record until
- * the end of the containing instruction. _This_ is what is stored
- * in the size part of the parameter, in this case.
- *
- * Also OUT_RESERVE denotes reservation of N bytes of BSS space,
- * and the contents of the "data" parameter is irrelevant.
- *
- * The "data" parameter for the output function points to a "long",
- * containing the address in question, unless the type is
- * OUT_RAWDATA, in which case it points to an "unsigned char"
- * array.
- */
- #define OUT_RAWDATA 0x00000000UL
- #define OUT_ADDRESS 0x10000000UL
- #define OUT_REL2ADR 0x20000000UL
- #define OUT_REL4ADR 0x30000000UL
- #define OUT_RESERVE 0x40000000UL
- #define OUT_TYPMASK 0xF0000000UL
- #define OUT_SIZMASK 0x0FFFFFFFUL
- /*
- * ------------------------------------------------------------
- * The data structure defining a debug format driver, and the
- * interfaces to the functions therein.
- * ------------------------------------------------------------
- */
- struct dfmt {
- /*
- * This is a short (one-liner) description of the type of
- * output generated by the driver.
- */
- char *fullname;
- /*
- * This is a single keyword used to select the driver.
- */
- char *shortname;
- /*
- * init - called initially to set up local pointer to object format,
- * void pointer to implementation defined data, file pointer (which
- * probably won't be used, but who knows?), and error function.
- */
- void (*init) (struct ofmt * of, void * id, FILE * fp, efunc error);
- /*
- * linenum - called any time there is output with a change of
- * line number or file.
- */
- void (*linenum) (const char * filename, long linenumber, long segto);
- /*
- * debug_deflabel - called whenever a label is defined. Parameters
- * are the same as to 'symdef()' in the output format. This function
- * would be called before the output format version.
- */
- void (*debug_deflabel) (char * name, long segment, long offset,
- int is_global, char * special);
- /*
- * debug_directive - called whenever a DEBUG directive other than 'LINE'
- * is encountered. 'directive' contains the first parameter to the
- * DEBUG directive, and params contains the rest. For example,
- * 'DEBUG VAR _somevar:int' would translate to a call to this
- * function with 'directive' equal to "VAR" and 'params' equal to
- * "_somevar:int".
- */
- void (*debug_directive) (const char * directive, const char * params);
- /*
- * typevalue - called whenever the assembler wishes to register a type
- * for the last defined label. This routine MUST detect if a type was
- * already registered and not re-register it.
- */
- void (*debug_typevalue) (long type);
- /*
- * debug_output - called whenever output is required
- * 'type' is the type of info required, and this is format-specific
- */
- void (*debug_output) (int type, void *param);
- /*
- * cleanup - called after processing of file is complete
- */
- void (*cleanup) (void);
- };
- /*
- * The type definition macros
- * for debugging
- *
- * low 3 bits: reserved
- * next 5 bits: type
- * next 24 bits: number of elements for arrays (0 for labels)
- */
- #define TY_UNKNOWN 0x00
- #define TY_LABEL 0x08
- #define TY_BYTE 0x10
- #define TY_WORD 0x18
- #define TY_DWORD 0x20
- #define TY_FLOAT 0x28
- #define TY_QWORD 0x30
- #define TY_TBYTE 0x38
- #define TY_COMMON 0xE0
- #define TY_SEG 0xE8
- #define TY_EXTERN 0xF0
- #define TY_EQU 0xF8
- #define TYM_TYPE(x) ((x) & 0xF8)
- #define TYM_ELEMENTS(x) (((x) & 0xFFFFFF00) >> 8)
- #define TYS_ELEMENTS(x) ((x) << 8)
- /*
- * -----
- * 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)) )
- #endif