/* SPDX-License-Identifier: BSD-2-Clause */ /* Copyright 1996-2025 The NASM Authors - All Rights Reserved */ /* * nasm.h main header file for the Netwide Assembler: inter-module interface */ #ifndef NASM_NASM_H #define NASM_NASM_H #include "compiler.h" #include #include "nasmlib.h" #include "nctype.h" #include "strlist.h" #include "preproc.h" #include "macros.h" #include "insnsi.h" /* For enum opcode */ #include "directiv.h" /* For enum directive */ #include "labels.h" /* For enum mangle_index, enum label_type */ #include "opflags.h" #include "regs.h" #include "x86const.h" #include "srcfile.h" #include "error.h" /* Program name for error messages etc. */ extern const char *_progname; /* Time stamp for the official start of compilation */ struct compile_time { time_t t; bool have_local, have_gm, have_posix; int64_t posix; struct tm local; struct tm gm; }; extern struct compile_time official_compile_time; /* POSIX timestamp if and only if we are not a reproducible build */ extern bool reproducible; static inline int64_t posix_timestamp(void) { return reproducible ? 0 : official_compile_time.posix; } #define NO_SEG INT32_C(-1) /* null segment value */ #define SEG_ABS 0x40000000L /* mask for far-absolute segments */ #define IDLEN_MAX 4096 #define DECOLEN_MAX 32 /* * Name pollution problems: 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; /* * Values for the `type' parameter to an output function. */ enum out_type { OUT_RAWDATA, /* Plain bytes */ OUT_RESERVE, /* Reserved bytes (RESB et al) */ OUT_ZERODATA, /* Initialized data, but all zero */ OUT_ADDRESS, /* An address (symbol value) */ OUT_RELADDR, /* A relative address */ OUT_SEGMENT, /* A segment number */ /* * These values are used by the legacy backend interface only; see * nasm_ofmt_output() in asm/assemble.c for more information. * These should never be used otherwise. Once all backends have * been fully migrated to the new interface they should be * removed. */ OUT_REL1ADR, OUT_REL2ADR, OUT_REL4ADR, OUT_REL8ADR }; enum out_flags { OUT_WRAP = 0, /* Undefined signedness (wraps) */ OUT_SIGNED = 1, /* Value is signed */ OUT_UNSIGNED = 2, /* Value is unsigned */ OUT_SIGNMASK = 3, /* Mask for signedness bits */ OUT_NOWARN = 4 /* Don't warn on overflow (already done?) */ }; /* * Description of an assembly output location */ struct location { int64_t offset; int32_t segment; bool known; }; extern struct location location; /* Current assembly location */ /* * The data we send down to the backend. * XXX: We still want to push down the base address symbol if * available, and replace the segment numbers with a structure. */ struct out_data { struct location loc; /* seg:offset being written to */ enum out_type type; /* See above */ enum out_flags flags; /* See above */ int inslen; /* Length of instruction */ int insoffs; /* Offset inside instruction */ int bits; /* Bits mode of compilation */ uint64_t size; /* Size of output */ const struct itemplate *itemp; /* Instruction template */ const void *data; /* Data for OUT_RAWDATA */ uint64_t toffset; /* Target address offset for relocation */ int32_t tsegment; /* Target segment for relocation */ int32_t twrt; /* Relocation with respect to */ int64_t relbase; /* Relative base for OUT_RELADDR */ struct src_location where; /* Source file and line */ const char *what; /* Additional description, e.g. "immediate" */ /* * Legacy output data fields; some of these differ in their * definition from the corresponding modern fields. * See nasm_ofmt_output() in asm/assemble.c. */ struct out_data_legacy { const void *data; enum out_type type; uint64_t size; int32_t tsegment; /* Legacy name "segment" */ int32_t twrt; /* Legacy name "wrt" */ } legacy; }; /* * And a label-definition function. 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, int32_t segment, int64_t offset, char *special, bool is_norm); /* * Token types returned by the scanner, in addition to ordinary * ASCII character values, and zero for end-of-string. */ enum token_type { /* token types, other than chars */ /* Token values shared between assembler and preprocessor */ /* Special codes */ TOKEN_INVALID = -1, /* a placeholder value */ TOKEN_BLOCK = -2, /* used for storage management */ TOKEN_FREE = -3, /* free token marker, use to catch leaks */ TOKEN_EOS = 0, /* end of string */ /* * Single-character operators. Enumerated here to keep strict * compilers happy, and for documentation. */ TOKEN_WHITESPACE = ' ', /* Preprocessor use */ TOKEN_BOOL_NOT = '!', TOKEN_AND = '&', TOKEN_OR = '|', TOKEN_XOR = '^', TOKEN_NOT = '~', TOKEN_MULT = '*', TOKEN_DIV = '/', TOKEN_MOD = '%', TOKEN_LPAR = '(', TOKEN_RPAR = ')', TOKEN_PLUS = '+', TOKEN_MINUS = '-', TOKEN_COMMA = ',', TOKEN_LBRACE = '{', TOKEN_RBRACE = '}', TOKEN_LBRACKET = '[', TOKEN_RBRACKET = ']', TOKEN_QMARK = '?', TOKEN_EQ = '=', /* = or == */ TOKEN_GT = '>', TOKEN_LT = '<', TOKEN_COLON = ':', /* Multi-character operators */ TOKEN_SHL = 256, /* << or <<< */ TOKEN_SHR, /* >> */ TOKEN_SAR, /* >>> */ TOKEN_SDIV, /* // */ TOKEN_SMOD, /* %% */ TOKEN_GE, /* >= */ TOKEN_LE, /* <= */ TOKEN_NE, /* <> (!= is same as <>) */ TOKEN_LEG, /* <=> */ TOKEN_DBL_AND, /* && */ TOKEN_DBL_OR, /* || */ TOKEN_DBL_XOR, /* ^^ */ TOKEN_MAX_OPERATOR, TOKEN_NUM, /* numeric constant */ TOKEN_ERRNUM, /* malformed numeric constant */ TOKEN_STR, /* string constant */ TOKEN_ERRSTR, /* unterminated string constant */ TOKEN_ID, /* identifier */ TOKEN_FLOAT, /* floating-point constant */ TOKEN_HERE, /* $, not '$' because it is not an operator */ TOKEN_BASE, /* $$ */ /* Token values only used by the assembler */ TOKEN_START_ASM, TOKEN_SEG, /* SEG */ TOKEN_WRT, /* WRT */ TOKEN_TIMES, /* TIMES */ TOKEN_FLOATIZE, /* __?floatX?__ */ TOKEN_STRFUNC, /* __utf16*__, __utf32*__ */ TOKEN_IFUNC, /* __ilog2*__ */ TOKEN_DECORATOR, /* decorators such as {...} */ TOKEN_MASM_PTR, /* __?masm_ptr?__ for the masm package */ TOKEN_MASM_FLAT, /* __?masm_flat?__ for the masm package */ TOKEN_OPMASK, /* translated token for opmask registers */ TOKEN_SIZE, /* BYTE, WORD, DWORD, QWORD, etc */ TOKEN_SPECIAL, /* REL, FAR, NEAR, STRICT, NOSPLIT, etc */ TOKEN_PREFIX, /* A32, O16, LOCK, REPNZ, TIMES, etc */ TOKEN_BRCCONST, /* braced constant expression */ TOKEN_REG, /* register name */ TOKEN_INSN, /* instruction name */ TOKEN_END_ASM, /* Token values only used by the preprocessor */ TOKEN_START_PP = TOKEN_END_ASM, TOKEN_OTHER, /* % sequence without (current) meaning */ TOKEN_PREPROC_ID, /* Preprocessor ID, e.g. %symbol */ TOKEN_MMACRO_PARAM, /* MMacro parameter, e.g. %1 */ TOKEN_LOCAL_SYMBOL, /* Local symbol, e.g. %%symbol */ TOKEN_LOCAL_MACRO, /* Context-local macro, e.g. %$symbol */ TOKEN_ENVIRON, /* %! */ TOKEN_INTERNAL_STR, /* Unquoted string that should remain so */ TOKEN_NAKED_STR, /* Unquoted string that can be re-quoted */ TOKEN_PREPROC_Q, /* %? */ TOKEN_PREPROC_QQ, /* %?? */ TOKEN_PREPROC_SQ, /* %*? */ TOKEN_PREPROC_SQQ, /* %*?? */ TOKEN_PASTE, /* %+ */ TOKEN_COND_COMMA, /* %, */ TOKEN_INDIRECT, /* %[...] */ TOKEN_XDEF_PARAM, /* Used during %xdefine processing */ /* smacro parameters starting here; an arbitrary number. */ TOKEN_SMAC_START_PARAMS, /* MUST BE LAST IN THE LIST!!! */ TOKEN_MAX = INT_MAX /* Keep compiler from reducing the range */ }; /* * Token flags */ enum token_flags { TFLAG_BRC = 1 << 0, /* valid only with braces. {1to8}, {rd-sae}, ...*/ TFLAG_BRC_OPT = 1 << 1, /* may or may not have braces. opmasks {k1} */ TFLAG_BRC_ANY = TFLAG_BRC | TFLAG_BRC_OPT, TFLAG_BRDCAST = 1 << 2, /* broadcasting decorator */ TFLAG_WARN = 1 << 3, /* warning only, treat as ID */ TFLAG_DUP = 1 << 4, /* valid ID but also has context-specific use */ TFLAG_ORBIT = 1 << 5 /* OR in the bit given in t_inttwo */ }; /* Must match the fp_formats[] array in asm/floats.c */ enum floatize { FLOAT_8, FLOAT_16, FLOAT_B16, FLOAT_32, FLOAT_64, FLOAT_80M, FLOAT_80E, FLOAT_128L, FLOAT_128H, FLOAT_ERR /* Invalid format, MUST BE LAST */ }; /* Must match the list in string_transform(), in strfunc.c */ enum strfunc { STRFUNC_UTF16, STRFUNC_UTF16LE, STRFUNC_UTF16BE, STRFUNC_UTF32, STRFUNC_UTF32LE, STRFUNC_UTF32BE }; enum ifunc { IFUNC_ILOG2E, IFUNC_ILOG2W, IFUNC_ILOG2F, IFUNC_ILOG2C }; size_t string_transform(char *, size_t, char **, enum strfunc); /* * 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 { int64_t t_integer; int64_t t_inttwo; char *t_charptr; const char *t_start; /* Pointer to token in input buffer */ int t_len; /* Length of token in input buffer */ enum token_type t_type; enum token_flags t_flag; }; typedef int (*scanner)(void *private_data, struct tokenval *tv); /* * 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 { int32_t type; /* a register, or EXPR_xxx */ int64_t value; /* must be >= 32 bits */ } expr; /* * Library routines to manipulate expression data types. */ enum expr_classes { EC_ZERO = 0, /* All-zero expression */ EC_CONST = 1, /* Additive constant */ EC_SEGABS = 2, /* Absolute segment reference */ EC_SIMPLE = EC_CONST | EC_SEGABS, EC_SELFREL = 4, /* Self-relative expression */ EC_SEG = 8, /* Has a segment base */ EC_WRT = 16, /* Has WRT */ EC_RELOC = EC_SIMPLE | EC_SELFREL | EC_SEG | EC_WRT, EC_UNKNOWN = 32, /* Has an "unknown" part */ EC_REGISTER = 64, /* Has a register */ EC_REGEXPR = 128, /* Has more than one register and/or reg*n */ EC_COMPLEX = 256 /* Even more complex, problematic */ }; enum expr_classes expr_class(const expr *vect); bool is_reloc(const expr *vect); bool is_simple(const expr *vect); bool is_really_simple(const expr *vect); bool is_unknown(const expr *vect); bool is_just_unknown(const expr *vect); int64_t reloc_value(const expr *vect); int32_t reloc_seg(const expr *vect); int32_t reloc_wrt(const expr *vect); bool is_self_relative(const expr *vect); void dump_expr(const expr *vect); /* * 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 { int64_t 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 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 ||. * * If `hints' is non-NULL, it gets filled in with some hints as to * the base register in complex effective addresses. */ #define CRITICAL 0x100 typedef expr *(*evalfunc)(scanner sc, void *scprivate, struct tokenval *tv, int *fwref, int critical, struct eval_hints *hints); /* * Special values for expr->type. * These come after EXPR_REG_END as defined in regs.h. * Expr types : 0 ~ EXPR_REG_END, EXPR_UNKNOWN, EXPR_...., EXPR_RDSAE, * EXPR_SEGBASE ~ EXPR_SEGBASE + SEG_ABS, ... */ #define EXPR_UNKNOWN (EXPR_REG_END+1) /* forward references */ #define EXPR_SIMPLE (EXPR_REG_END+2) #define EXPR_WRT (EXPR_REG_END+3) #define EXPR_RDSAE (EXPR_REG_END+4) #define EXPR_SEGBASE (EXPR_REG_END+5) /* * preprocessors ought to look like this: */ enum preproc_mode { PP_NORMAL, /* Assembly */ PP_DEPS, /* Dependencies only */ PP_PREPROC /* Preprocessing only */ }; enum preproc_opt { PP_TRIVIAL = 1, /* Only %line or # directives */ PP_NOLINE = 2, /* Ignore %line and # directives */ PP_TASM = 4 /* TASM compatibility hacks */ }; /* * Called once at the very start of assembly. */ void pp_init(enum preproc_opt opt); /* * 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 pp_reset(const char *file, enum preproc_mode mode, struct strlist *deplist); /* * Called to fetch a line of preprocessed source. The line * returned has been malloc'ed, and so should be freed after * use. */ char *pp_getline(void); /* Called at the end of each pass. */ void pp_cleanup_pass(void); /* * Called at the end of the assembly session, * after cleanup_pass() has been called for the * last pass. */ void pp_cleanup_session(void); /* Early definitions and undefinitions for macros */ void pp_pre_define(char *definition); void pp_pre_undefine(char *definition); /* Include file from command line */ void pp_pre_include(char *fname); /* Add a command from the command line */ void pp_pre_command(const char *what, char *str); /* Include path from command line */ void pp_include_path(struct strlist *ipath); /* Unwind the macro stack when printing an error message */ void pp_error_list_macros(errflags severity); /* Return true if an error message should be suppressed */ bool pp_suppress_error(errflags severity); /* List of dependency files */ extern struct strlist *depend_list; /* TASM mode changes some properties */ extern bool tasm_compatible_mode; /* * inline function to skip past an identifier; returns the first character past * the identifier if valid, otherwise NULL. */ static inline char *nasm_skip_identifier(const char *str) { const char *p = str; if (!nasm_isidstart(*p++)) { p = NULL; } else { while (nasm_isidchar(*p++)) ; } return (char *)p; } /* * Data-type flags that get passed to listing-file routines. */ enum { LIST_READ, LIST_MACRO, LIST_INCLUDE, LIST_INCBIN, LIST_TIMES }; /* * ----------------------------------------------------------- * Format of the `insn' structure returned from `parser.c' and * passed into `assemble.c' * ----------------------------------------------------------- */ /* * REX flags * * Note: REX_[BXRW] and REX_P must match the locations of these * bits within an actual REX prefix (with REX_P being the invariant * 0x40 bit. REX_[BXR]1 must match the locations of these bits * within the REX2 prefix, shifted into the second byte (<< 12). * Finally, REX_[BXR]V are should match BXR << 16. * * REX_W64 is a separate bit to indicate that REX.W should be set * if the operand size is 64. It can be overridden by the "nw" (0327) * byte code. */ #define REX_MASK 0x4f /* Actual REX prefix bits */ #define REX_B 0x01 /* ModRM r/m extension */ #define REX_X 0x02 /* SIB index extension */ #define REX_R 0x04 /* ModRM reg extension */ #define REX_W 0x08 /* 64-bit operand size */ #define REX_L 0x20 /* Use LOCK prefix instead of REX.R */ #define REX_P 0x40 /* REX prefix present/required */ #define REX_H 0x80 /* High register present, REX forbidden */ #define REX_V 0x0100 /* Instruction uses VEX/XOP instead of REX */ #define REX_NH 0x0200 /* Instruction which doesn't use high regs */ #define REX_EV 0x0400 /* Instruction uses EVEX instead of REX */ #define REX_2 0x0800 /* Instruction requires REX2 */ #define REX_B1 0x1000 /* REX2/EVEX B second bit */ #define REX_X1 0x2000 /* REX2/EVEX X second bit */ #define REX_R1 0x4000 /* REX2/EVEX R second bit */ #define REX_NW 0x8000 /* REX.W not required for 64-bit operand mode */ #define REX_BV 0x10000 /* B is not a GPR or CREG */ #define REX_XV 0x20000 /* X is not a GPR or CREG */ #define REX_RV 0x40000 /* R is not a GPR or CREG */ #define REX_BXR0 0x0007 #define REX_BXR1 0x7000 #define REX_BXR 0x7007 #define REX_BXRV 0x70000 /* All flags pertaining to B, X, and R */ #define REX_rB (REX_B | REX_B1 | REX_BV | REX_H | REX_P) #define REX_rX (REX_X | REX_X1 | REX_XV | REX_H | REX_P) #define REX_rR (REX_R | REX_R1 | REX_RV | REX_H | REX_P) /* * EVEX bit fields. Note that the P[] numbers in the SDM does not include * the leading 0x62 byte, so add 8 to the position. * * NOTES: B4 is in bit X3 = P[5] if B is a vector * X4 is in bit V4 = P[19] if X is a vector */ #define evexf(name,pos,width) \ mk_field(EVEX_ ## name, 8+(pos), width) enum evex_fields { evexf(MM, 0, 3), /* EVEX P[2:0] : Opcode map */ evexf(B4, 3, 1), /* EVEX P[3] : Bit 4 B register (B4*) */ evexf(R4, 4, 1), /* EVEX P[4] : Bit 4 R register (R4) */ evexf(B3, 5, 1), /* EVEX P[5] : Bit 3 B register (B3) */ evexf(X3, 6, 1), /* EVEX P[5] : Bit 3 X register (X3*) */ evexf(R3, 7, 1), /* EVEX P[7] : Bit 3 R register (R3) */ evexf(PP, 8, 2), /* EVEX P[9:8] : Legacy prefix */ evexf(X4, 10, 1), /* EVEX P[10] : Bit 4 X register (X4) */ evexf(VVVV, 11, 4), /* EVEX P[14:11] : V register (V3-V0) */ evexf(W, 15, 1), /* EVEX P[15] : Osize extension (REX.W) */ evexf(AAA, 16, 3), /* EVEX P[18:16] : Embedded opmask */ evexf(NF, 18, 1), /* EVEX P[18]: No flags bit */ evexf(V4, 19, 1), /* EVEX P[19] : Bit 4 V register (V4*) */ evexf(SCC, 16, 4), /* EVEX P[19:16]: Modified condition */ evexf(B, 20, 1), /* EVEX P[20] : Broadcast / RC / SAE */ evexf(ND, 20, 1), /* EVEX P[20] : New destination */ evexf(ZU, 20, 1), /* EVEX P[20] : Zero upper */ evexf(LL, 21, 2), /* EVEX P[22:21] : Vector length */ evexf(RC, 21, 2), /* EVEX P[22:21] : Rounding control */ evexf(Z, 23, 1) /* EVEX P[23] : Zeroing/Merging */ }; /* * REX_V "classes" (prefixes which behave like VEX) */ enum vex_class { RV_VEX = 0, /* C4/C5 */ RV_XOP = 1, /* 8F */ RV_EVEX = 2 /* 62 */ }; /* * Note that because segment registers may be used as instruction * prefixes, we must ensure the enumerations for prefixes and * register names do not overlap. * * These MUST match the table in common/common.c */ enum prefixes { /* instruction prefixes */ P_none = 0, P_any = 1, PREFIX_ENUM_START = REG_ENUM_LIMIT, P_A16 = PREFIX_ENUM_START, P_A32, P_A64, P_ASP, P_LOCK, P_O16, P_O32, P_O64, P_OSP, P_REP, P_REPE, P_REPNE, P_REPNZ, P_REPZ, P_WAIT, P_XACQUIRE, P_XRELEASE, P_BND, P_NOBND, P_REX, P_REX2, P_EVEX, P_VEX, P_VEX3, P_VEX2, P_NF, P_ZU, P_PT, P_PN, PREFIX_ENUM_LIMIT }; enum ea_flags { /* 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 */ EAF_REL = 8, /* IP-relative addressing */ EAF_ABS = 16, /* non-IP-relative addressing */ EAF_MIB = 32, /* mib operand */ EAF_SIB = 64, /* SIB encoding obligatory */ EAF_NOTFSGS = 128, /* no fs: or gs: */ EAF_FS = 256, /* fs segment override present */ EAF_GS = 512 /* gs segment override present */ }; enum eval_hint { /* 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 */ EAH_SUMMED = 3 /* base and index are summed into index */ }; typedef struct operand { /* operand to an instruction */ opflags_t type; /* type of operand */ opflags_t xsize; /* size flags used in find_match() */ enum reg_enum basereg; enum reg_enum indexreg; /* address registers */ int scale; /* index scale */ int hintbase; enum eval_hint hinttype; /* hint as to real base register */ int32_t segment; /* immediate segment, if needed */ int64_t offset; /* any immediate number */ int32_t wrt; /* segment base it's relative to */ int eaflags; /* special EA flags */ int opflags; /* see OPFLAG_* defines below */ int iflag; /* Requires a specific IF_* flag */ decoflags_t decoflags; /* decorator flags such as {...} */ bool bcast; /* broadcast operand */ uint8_t disp_size; /* 0 means default; 16; 32; 64 */ uint8_t opidx; /* Operand index */ } operand; #define OPFLAG_FORWARD 1 /* operand is a forward reference */ #define OPFLAG_EXTERN 2 /* operand is an external reference */ #define OPFLAG_UNKNOWN 4 /* operand is an unknown reference (always a forward reference also) */ #define OPFLAG_RELATIVE 8 /* operand is self-relative, e.g. [foo - $] where foo is not in the current segment */ #define OPFLAG_SIMPLE 16 /* operand is a simple expression */ enum extop_type { /* extended operand types */ EOT_NOTHING = 0, EOT_EXTOP, /* Subexpression */ EOT_DB_STRING, /* Byte string */ EOT_DB_FLOAT, /* Floating-pointer number (special byte string) */ EOT_DB_STRING_FREE, /* Byte string which should be nasm_free'd*/ EOT_DB_NUMBER, /* Integer */ EOT_DB_RESERVE /* ? */ }; typedef struct extop { /* extended operand */ struct extop *next; /* linked list */ union { struct { /* text or byte string */ char *data; size_t len; } string; struct { /* numeric expression */ int64_t offset; /* numeric value or address offset */ int32_t segment; /* address segment */ int32_t wrt; /* address wrt */ bool relative; /* self-relative expression */ } num; struct extop *subexpr; /* actual expressions */ } val; size_t dup; /* duplicated? */ enum extop_type type; /* defined above */ int elem; /* element size override, if any (bytes) */ } extop; enum ea_type { EA_INVALID, /* Not a valid EA at all */ EA_SCALAR, /* Scalar EA */ EA_XMMVSIB, /* XMM vector EA */ EA_YMMVSIB, /* YMM vector EA */ EA_ZMMVSIB /* ZMM vector EA */ }; /* * Prefix positions: each type of prefix goes in a specific slot. * This affects the final ordering of the assembled output, which * shouldn't matter to the processor, but if you have stylistic * preferences, you can change this. REX prefixes are handled * differently for the time being. * * LOCK and REP used to be one slot; this is no longer the case since * the introduction of HLE. * * The prefixes are emitted in order by slot number. * * Note: these are stored in an PPS_BITS-bit field in the token hash! * */ enum prefix_pos { PPS_WAIT = 0, /* WAIT (technically not a prefix!) */ PPS_SEG, /* Segment override prefix */ PPS_ASIZE, /* Address size prefix */ PPS_LOCK, /* LOCK prefix */ PPS_OSIZE, /* Operand size prefix */ PPS_REP, /* REP/HLE prefix */ PPS_REX, /* REX/VEX type */ PPS_NF, /* Do not set flags */ PPS_ZU, /* Zero upper register */ MAXPREFIX /* Total number of prefix slots */ }; /* * Tuple types that are used when determining Disp8*N eligibility * The order must match with a hash %tuple_codes in insns.pl */ enum ttypes { FV = 001, HV = 002, FVM = 003, T1S8 = 004, T1S16 = 005, T1S = 006, T1F32 = 007, T1F64 = 010, T2 = 011, T4 = 012, T8 = 013, HVM = 014, QVM = 015, OVM = 016, M128 = 017, DUP = 020 }; /* EVEX.L'L : Vector length on vector insns */ enum vectlens { VL128 = 0, VL256 = 1, VL512 = 2, VLMAX = 3 }; /* A postprocessed effective address (EA) */ struct ea_data { enum ea_type type; /* what kind of EA is this? */ uint32_t rex; /* EA-derived REX flags */ bool sib_present; /* is a SIB byte necessary? */ uint8_t bytes; /* # of bytes of offset needed */ uint8_t size; /* lazy - this is sib+bytes+1 */ uint8_t modrm, sib; /* the bytes themselves */ bool rip; /* RIP-relative? */ int8_t disp8; /* 8-bit displacement, possibly compressed */ uint8_t disp8_shift; /* Shift for 8-bit displacement */ bool disp8_ok; /* 8-bit displacement is valid */ }; /* * flag to disable optimizations selectively * this is useful to turn-off certain optimizations */ enum optimization { /* Individual flags */ OPTIM_NO_Jcc_RELAX = 1, /* Disable Jcc relaxation */ OPTIM_NO_JMP_RELAX = 2, /* Disable JMP relaxation */ OPTIM_STRICT_INSTR = 4, /* Disable alternate instructions */ OPTIM_STRICT_OPER = 8, /* Disable operand relaxation */ OPTIM_DISABLE_FWREF = 16, /* Disable forward reference relaxation */ OPTIM_STRICT_OSIZE = 32, /* Disable osize adjustments */ /* Everything */ OPTIM_ALL_ENABLED = 0, /* Disable all jump relaxations */ OPTIM_DISABLE_JMP_MATCH = OPTIM_NO_Jcc_RELAX | OPTIM_NO_JMP_RELAX, /* Level 0 : 0.98 behavior */ OPTIM_LEVEL_0 = OPTIM_STRICT_INSTR | OPTIM_STRICT_OSIZE | OPTIM_STRICT_OPER | OPTIM_NO_JMP_RELAX, /* Level 1 : 0.98.09 behavior */ OPTIM_LEVEL_1 = OPTIM_STRICT_INSTR | OPTIM_STRICT_OSIZE | OPTIM_NO_Jcc_RELAX | OPTIM_NO_JMP_RELAX | OPTIM_DISABLE_FWREF, /* Default */ OPTIM_DEFAULT = OPTIM_ALL_ENABLED }; /* * Used with byte values for prefixes when no single byte value applies */ enum prefix_err { PFE_NULL = -1, /* No output */ PFE_MULTI = -2, /* Multibyte output (VEX, EVEX, REX2) */ PFE_ERR = -3, /* Invalid prefix use */ PFE_WHAT = -4 /* Not a valid prefix (internal error) */ }; typedef struct insn { /* an instruction itself */ enum opcode opcode; /* the opcode - not just the string */ struct location loc; /* assembly location */ int prefixes[MAXPREFIX]; /* instruction prefixes, if any */ int need_pfx[MAXPREFIX]; /* byte prefixes used as opcodes */ char *label; /* the label defined, or NULL */ extop *eops; /* extended operands */ int eops_float; /* true if DD and floating */ int32_t times; /* repeat count (TIMES prefix) */ bool rex_done; /* REX prefix emitted? */ bool dummy; /* not a real instruction, no errors */ uint8_t bits; /* Execution mode (16, 32, 64) */ uint8_t op_size; /* operand size */ uint8_t addr_size; /* address size */ uint8_t operands; /* how many operands? 0-7 unless eops */ uint8_t vexreg; /* Register encoded in VEX.V */ uint8_t veximm; /* Bit-inverted immediate encoded in VEX.V */ uint8_t vex_cm; /* Class and M field for VEX prefix */ uint8_t vex_wlp; /* W, P and L information for VEX prefix */ uint32_t rex; /* REX prefix flags */ uint32_t evex; /* EVEX prefix under construction */ enum ttypes evex_tuple; /* Tuple type for compressed Disp8*N */ int evex_rm; /* static rounding mode for AVX512 (EVEX) */ enum optimization opt; /* Optimization flags to use */ struct ea_data ea; /* Effective address data */ const struct itemplate *itemp; /* Instruction template */ const struct operand *evex_brerop; /* BR/ER/SAE operand position */ struct operand oprs[MAX_OPERANDS]; /* the operands, defined as above */ } insn; /* Instruction flags type: IF_* flags are defined in insns.h */ typedef uint64_t iflags_t; /* * What to return from a directive- or pragma-handling function. * Currently DIRR_OK and DIRR_ERROR are treated the same way; * in both cases the backend is expected to produce the appropriate * error message on its own. * * DIRR_BADPARAM causes a generic error message to be printed. Note * that it is an error, not a warning, even in the case of pragmas; * don't use it where forward compatibility would be compromised * (instead consider adding a DIRR_WARNPARAM.) */ enum directive_result { DIRR_UNKNOWN, /* Directive not handled by backend */ DIRR_OK, /* Directive processed */ DIRR_ERROR, /* Directive processed unsuccessfully */ DIRR_BADPARAM /* Print bad argument error message */ }; /* * A pragma facility: this structure is used to request passing a * parsed pragma directive for a specific facility. If the handler is * NULL then this pragma facility is recognized but ignored; pragma * processing stops at that point. * * Note that the handler is passed a pointer to the facility structure * as part of the struct pragma. */ struct pragma; typedef enum directive_result (*pragma_handler)(const struct pragma *); struct pragma_facility { const char *name; pragma_handler handler; }; /* * This structure defines how a pragma directive is passed to a * facility. This structure may be augmented in the future. * * Any facility MAY, but is not required to, add its operations * keywords or a subset thereof into asm/directiv.dat, in which case * the "opcode" field will be set to the corresponding D_ constant * from directiv.h; otherwise it will be D_unknown. */ struct pragma { const struct pragma_facility *facility; const char *facility_name; /* Facility name exactly as entered by user */ const char *opname; /* First word after the facility name */ const char *tail; /* Anything after the operation */ enum directive opcode; /* Operation as a D_ directives constant */ }; /* * These are semi-arbitrary limits to keep the assembler from going * into a black hole on certain kinds of bugs. They can be overridden * by command-line options or %pragma. */ enum nasm_limit { LIMIT_PASSES, LIMIT_STALLED, LIMIT_MACRO_LEVELS, LIMIT_MACRO_TOKENS, LIMIT_MMACROS, LIMIT_REP, LIMIT_EVAL, LIMIT_LINES }; #define LIMIT_MAX LIMIT_LINES extern int64_t nasm_limit[LIMIT_MAX+1]; extern enum directive_result nasm_set_limit(const char *, const char *); /* * 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. */ const char *fullname; /* * This is a single keyword used to select the driver. */ const char *shortname; /* * Default output filename extension, or a null string */ const char *extension; /* * Output format flags. */ #define OFMT_TEXT 1 /* Text file format */ #define OFMT_KEEP_ADDR 2 /* Keep addr; no conversion to data */ #define OFMT_ZERODATA 4 /* "Native" OUT_ZERODATA support */ unsigned int flags; int maxbits; /* Maximum segment bits supported */ /* * this is a pointer to the first element of the debug information */ const struct dfmt * const *debug_formats; /* * the default debugging format if -F is not specified */ const struct dfmt *default_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). */ macros_t *stdmac; /* * This procedure is called at the start of an output session to set * up internal parameters. */ void (*init)(void); /* * This procedure is called at the start of each pass. */ void (*reset)(void); /* * This is the modern output function, which gets passed * a struct out_data with much more information. See the * definition of struct out_data. */ void (*output)(const struct out_data *data); /* * 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, int32_t segment, int64_t 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, 32 or 64. Or, if it * doesn't wish to define a default, it can leave `bits' alone. */ int32_t (*section)(char *name, int *bits); /* * This function is called when a label is defined * in the source code. It is allowed to change the section * number as a result, but not the bits value. * This is *only* called if the symbol defined is at the * current offset, i.e. "foo:" or "foo equ $". * The offset isn't passed; and may not be stable at this point. * The subsection number is a field available for use by the * backend. It is initialized to NO_SEG. * * If "copyoffset" is set by the backend then the offset is * copied from the previous segment, otherwise the new segment * is treated as a new segment the normal way. */ int32_t (*herelabel)(const char *name, enum label_type type, int32_t seg, int32_t *subsection, bool *copyoffset); /* * This procedure is called to modify section alignment, * note there is a trick, the alignment can only increase */ void (*sectalign)(int32_t seg, unsigned int value); /* * 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. */ int32_t (*segbase)(int32_t 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'. * * The following values are (currently) possible for * directive_result: * * 0 - DIRR_UNKNOWN - directive not recognized by backend * 1 - DIRR_OK - directive processed ok * 2 - DIRR_ERROR - backend printed its own error message * 3 - DIRR_BADPARAM - print the generic message * "invalid parameter to [*] directive" * * When called with "value" as NULL (as opposed to the empty * string!), it should perform no action and not print any * messages, but return DIRR_UNKNOWN if this directive is * unsupported by the backend, DIRR_OK if it is, and either * DIRR_ERROR or DIRR_BADPARAM if it *would* be supported by the * backend if configured otherwise, but it would be invalid in the * current context, regardless of the parameter(s). * * This is used by %ifdirective. */ enum directive_result (*directive)(enum directive directive, char *value); /* * 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)(void); /* * List of pragma facility names that apply to this backend. */ const struct pragma_facility *pragmas; }; /* * Output format driver alias */ struct ofmt_alias { const char *shortname; const struct ofmt *ofmt; }; extern const struct ofmt *ofmt; extern FILE *ofile; /* * ------------------------------------------------------------ * The data structure defining a debug format driver, and the * interfaces to the functions therein. * ------------------------------------------------------------ */ struct debug_macro_info; struct dfmt { /* * This is a short (one-liner) description of the type of * output generated by the driver. */ const char *fullname; /* * This is a single keyword used to select the driver. */ const char *shortname; /* * init - called initially to set up local pointer to object format. */ void (*init)(void); /* * linenum - called any time there is output with a change of * line number or file. */ void (*linenum)(const char *filename, int32_t linenumber, int32_t segto); /* * debug_deflabel - called whenever a label is defined. Parameters * are the same as to 'symdef()' in the output format. This function * is called after the output format version. */ void (*debug_deflabel)(char *name, int32_t segment, int64_t offset, int is_global, char *special); /* * debug_smacros - called when an smacro is defined or undefined * during the code-generation pass. The definition string contains * the macro name, any arguments, a single space, and the macro * definition; this is what is expected by e.g. DWARF. * * The definition is provided even for an undef. */ void (*debug_smacros)(bool define, const char *def); /* * debug_include - called when a file is included or the include * is finished during the code-generation pass. The filename is * kept by the srcfile system and so can be compared for pointer * equality. * * A filename of NULL means builtin (initial or %use) or command * line statements. */ void (*debug_include)(bool start, struct src_location outer, struct src_location inner); /* * debug_mmacros - called once at the end with a definition for each * non-.nolist macro that has been invoked at least once in the program, * and the corresponding address ranges. See dbginfo.h. */ void (*debug_mmacros)(const struct debug_macro_info *); /* * 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)(int32_t 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); /* * List of pragma facility names that apply to this backend. */ const struct pragma_facility *pragmas; }; extern const struct dfmt *dfmt; /* * 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_OWORD 0x40 #define TY_YWORD 0x48 #define TY_ZWORD 0x50 #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) /* Sizes corresponding to various tokens */ enum byte_sizes { SIZE_BYTE = 1, SIZE_WORD = 2, SIZE_DWORD = 4, SIZE_LONG = 4, SIZE_QWORD = 8, SIZE_TWORD = 10, SIZE_OWORD = 16, SIZE_YWORD = 32, SIZE_ZWORD = 64 }; enum special_tokens { SIZE_ENUM_START = PREFIX_ENUM_LIMIT, S_BYTE = SIZE_ENUM_START, S_WORD, S_DWORD, S_LONG, S_QWORD, S_TWORD, S_OWORD, S_YWORD, S_ZWORD, SIZE_ENUM_LIMIT, SPECIAL_ENUM_START = SIZE_ENUM_LIMIT, S_ABS = SPECIAL_ENUM_START, S_FAR, S_NEAR, S_NOSPLIT, S_REL, S_SHORT, S_STRICT, S_TO, SPECIAL_ENUM_LIMIT }; enum decorator_tokens { DECORATOR_ENUM_START = SPECIAL_ENUM_LIMIT, BRC_1TO2 = DECORATOR_ENUM_START, BRC_1TO4, BRC_1TO8, BRC_1TO16, BRC_1TO32, BRC_RN, BRC_RD, BRC_RU, BRC_RZ, BRC_SAE, BRC_Z, DECORATOR_ENUM_LIMIT }; /* * AVX512 Decorator (decoflags_t) bits distribution (counted from 0) * 3 2 1 * 10987654321098765432109876543210 * | * | word boundary * ............................1111 opmask * ...........................1.... zeroing / merging * ..........................1..... broadcast * .........................1...... static rounding * ........................1....... SAE * ....................1111........ broadcast element size * .................111............ number of broadcast elements */ #define OP_GENVAL(val, bits, shift) (((val) & ((UINT64_C(1) << (bits)) - 1)) << (shift)) /* * Opmask register number * identical to EVEX.aaa * * Bits: 0 - 3 */ #define OPMASK_SHIFT (0) #define OPMASK_BITS (4) #define OPMASK_MASK OP_GENMASK(OPMASK_BITS, OPMASK_SHIFT) #define GEN_OPMASK(bit) OP_GENBIT(bit, OPMASK_SHIFT) #define VAL_OPMASK(val) OP_GENVAL(val, OPMASK_BITS, OPMASK_SHIFT) /* * zeroing / merging control available * matching to EVEX.z * * Bits: 4 */ #define Z_SHIFT (4) #define Z_BITS (1) #define Z_MASK OP_GENMASK(Z_BITS, Z_SHIFT) #define GEN_Z(bit) OP_GENBIT(bit, Z_SHIFT) /* * broadcast - Whether this operand can be broadcasted * * Bits: 5 */ #define BRDCAST_SHIFT (5) #define BRDCAST_BITS (1) #define BRDCAST_MASK OP_GENMASK(BRDCAST_BITS, BRDCAST_SHIFT) #define GEN_BRDCAST(bit) OP_GENBIT(bit, BRDCAST_SHIFT) /* * Whether this instruction can have a static rounding mode. * It goes with the last simd operand because the static rounding mode * decorator is located between the last simd operand and imm8 (if any). * * Bits: 6 */ #define STATICRND_SHIFT (6) #define STATICRND_BITS (1) #define STATICRND_MASK OP_GENMASK(STATICRND_BITS, STATICRND_SHIFT) #define GEN_STATICRND(bit) OP_GENBIT(bit, STATICRND_SHIFT) /* * SAE(Suppress all exception) available * * Bits: 7 */ #define SAE_SHIFT (7) #define SAE_BITS (1) #define SAE_MASK OP_GENMASK(SAE_BITS, SAE_SHIFT) #define GEN_SAE(bit) OP_GENBIT(bit, SAE_SHIFT) /* * Broadcasting element size. * * Bits: 8 - 11 */ #define BRSIZE_SHIFT (8) #define BRSIZE_BITS (4) #define BRSIZE_MASK OP_GENMASK(BRSIZE_BITS, BRSIZE_SHIFT) #define GEN_BRSIZE(bit) OP_GENBIT(bit, BRSIZE_SHIFT) #define BR_BITS8 GEN_BRSIZE(0) /* For potential future use */ #define BR_BITS16 GEN_BRSIZE(1) #define BR_BITS32 GEN_BRSIZE(2) #define BR_BITS64 GEN_BRSIZE(3) /* * Number of broadcasting elements * * Bits: 12 - 14 */ #define BRNUM_SHIFT (12) #define BRNUM_BITS (3) #define BRNUM_MASK OP_GENMASK(BRNUM_BITS, BRNUM_SHIFT) #define VAL_BRNUM(val) OP_GENVAL(val, BRNUM_BITS, BRNUM_SHIFT) #define BR_1TO2 VAL_BRNUM(0) #define BR_1TO4 VAL_BRNUM(1) #define BR_1TO8 VAL_BRNUM(2) #define BR_1TO16 VAL_BRNUM(3) #define BR_1TO32 VAL_BRNUM(4) #define BR_1TO64 VAL_BRNUM(5) /* For potential future use */ #define MASK OPMASK_MASK /* Opmask (k1 ~ 7) can be used */ #define Z Z_MASK #define B16 (BRDCAST_MASK|BR_BITS16) /* {1to32} : broadcast 16b * 32 to zmm(512b) */ #define B32 (BRDCAST_MASK|BR_BITS32) /* {1to16} : broadcast 32b * 16 to zmm(512b) */ #define B64 (BRDCAST_MASK|BR_BITS64) /* {1to8} : broadcast 64b * 8 to zmm(512b) */ #define ER STATICRND_MASK /* ER(Embedded Rounding) == Static rounding mode */ #define SAE SAE_MASK /* SAE(Suppress All Exception) */ /* * Broadcast flags (BR_BITS*) to sizes (BITS*) */ static inline opflags_t brsize_to_size(opflags_t brbits) { return (brbits & BRSIZE_MASK) << (SIZE_SHIFT - BRSIZE_SHIFT); } /* * Global modes */ /* * Various types of compiler passes we may execute. * If these are changed, you need to also change _pass_types[] * in asm/nasm.c. */ enum pass_type { PASS_INIT, /* Initialization, not doing anything yet */ PASS_PREPROC, /* Preprocess-only mode (similar to PASS_FIRST) */ PASS_FIRST, /* The very first pass over the code */ PASS_OPT, /* Optimization pass */ PASS_STAB, /* Stabilization pass (original pass 1) */ PASS_FINAL /* Code generation pass (original pass 2) */ }; extern const char * const _pass_types[]; extern enum pass_type _pass_type; static inline enum pass_type pass_type(void) { return _pass_type; } static inline const char *pass_type_name(void) { return _pass_types[_pass_type]; } /* True during initialization, no code read yet */ static inline bool not_started(void) { return pass_type() == PASS_INIT; } /* True for the initial pass and setup (old "pass2 < 2") */ static inline bool pass_first(void) { return pass_type() <= PASS_FIRST; } /* At this point we better have stable definitions */ static inline bool pass_stable(void) { return pass_type() >= PASS_STAB; } /* True for the code generation pass only, (old "pass1 >= 2") */ static inline bool pass_final(void) { return pass_type() >= PASS_FINAL; } /* True for code generation *or* preprocess-only mode */ static inline bool pass_final_or_preproc(void) { return pass_type() >= PASS_FINAL || pass_type() == PASS_PREPROC; } /* * The actual pass number. 0 is used during initialization, the very * first pass is 1, and then it is simply increasing numbers until we are * done. */ extern int64_t _passn; /* Actual pass number */ static inline int64_t pass_count(void) { return _passn; } extern enum optimization optimizing; /* Pass-wide state; reset on top of each pass */ struct globalopt { int bits; /* 16, 32 or 64-bit mode */ enum ea_flags rel; /* default to relative addressing? */ enum ea_flags reldef; /* default rel/abs explicitly defined? */ bool bnd; /* default to using bnd prefix? */ bool dollarhex; /* $-prefixed hexadecimal numbers? */ }; extern struct globalopt globl; extern const char *inname; /* primary input filename */ extern const char *outname; /* output filename */ /* * Switch to a different segment and return the current offset */ int64_t switch_segment(int32_t segment); #endif /* NASM_NASM_H */