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- /*
- * Copyright (c) 1998 The Santa Cruz Operation, Inc.. All Rights Reserved.
- *
- * THIS IS UNPUBLISHED PROPRIETARY SOURCE CODE OF THE
- * SANTA CRUZ OPERATION INC.
- *
- * The copyright notice above does not evidence any actual or intended
- * publication of such source code.
- */
-
- #ident "@(#)sgs-head:i386/head/syms.h 2.8.1.2"
-
- #ifndef _SYMS_H
- #define _SYMS_H
-
- /* Storage Classes are defined in storclass.h */
- #include <storclass.h>
-
- /* Number of characters in a symbol name */
- #define SYMNMLEN 8
- /* Number of characters in a file name */
- #define FILNMLEN 14
- /* Number of array dimensions in auxiliary entry */
- #define DIMNUM 4
-
- struct syment
- {
- union
- {
- char _n_name[SYMNMLEN]; /* old COFF version */
- struct
- {
- long _n_zeroes; /* new == 0 */
- long _n_offset; /* offset into string table */
- } _n_n;
- char *_n_nptr[2]; /* allows for overlaying */
- } _n;
- unsigned
- long n_value; /* value of symbol */
- short n_scnum; /* section number */
- unsigned short n_type; /* type and derived type */
- char n_sclass; /* storage class */
- char n_numaux; /* number of aux. entries */
- #if defined(m88k)
- char n_pad1; /* pad to 4 byte multiple */
- char n_pad2; /* pad to 4 byte multiple */
- #endif
- };
-
- #define n_name _n._n_name
- #define n_nptr _n._n_nptr[1]
- #define n_zeroes _n._n_n._n_zeroes
- #define n_offset _n._n_n._n_offset
-
- /*
- Relocatable symbols have a section number of the
- section in which they are defined. Otherwise, section
- numbers have the following meanings:
- */
- /* undefined symbol */
- #define N_UNDEF 0
- /* value of symbol is absolute */
- #define N_ABS -1
- /* special debugging symbol -- value of symbol is meaningless */
- #define N_DEBUG -2
- /* indicates symbol needs transfer vector (preload) */
- #define N_TV (unsigned short)-3
-
- /* indicates symbol needs transfer vector (postload) */
-
- #define P_TV (unsigned short)-4
-
- /*
- The fundamental type of a symbol packed into the low
- 4 bits of the word.
- */
-
- #define _EF ".ef"
-
- #define T_NULL 0
- #define T_ARG 1 /* function argument (only used by compiler) */
- #define T_CHAR 2 /* character */
- #define T_SHORT 3 /* short integer */
- #define T_INT 4 /* integer */
- #define T_LONG 5 /* long integer */
- #define T_FLOAT 6 /* floating point */
- #define T_DOUBLE 7 /* double word */
- #define T_STRUCT 8 /* structure */
- #define T_UNION 9 /* union */
- #define T_ENUM 10 /* enumeration */
- #define T_MOE 11 /* member of enumeration */
- #define T_UCHAR 12 /* unsigned character */
- #define T_USHORT 13 /* unsigned short */
- #define T_UINT 14 /* unsigned integer */
- #define T_ULONG 15 /* unsigned long */
-
- /*
- * derived types are:
- */
-
- #define DT_NON 0 /* no derived type */
- #define DT_PTR 1 /* pointer */
- #define DT_FCN 2 /* function */
- #define DT_ARY 3 /* array */
-
- /*
- * type packing constants
- */
-
- #define N_BTMASK 017
- #define N_TMASK 060
- #define N_TMASK1 0300
- #define N_TMASK2 0360
- #define N_BTSHFT 4
- #define N_TSHIFT 2
-
- /*
- * MACROS
- */
-
- /* Basic Type of x */
-
- #define BTYPE(x) ((x) & N_BTMASK)
-
- /* Is x a pointer ? */
-
- #define ISPTR(x) (((x) & N_TMASK) == (DT_PTR << N_BTSHFT))
-
- /* Is x a function ? */
-
- #define ISFCN(x) (((x) & N_TMASK) == (DT_FCN << N_BTSHFT))
-
- /* Is x an array ? */
-
- #define ISARY(x) (((x) & N_TMASK) == (DT_ARY << N_BTSHFT))
-
- /* Is x a structure, union, or enumeration TAG? */
-
- #define ISTAG(x) ((x)==C_STRTAG || (x)==C_UNTAG || (x)==C_ENTAG)
-
- #define INCREF(x) ((((x)&~N_BTMASK)<<N_TSHIFT)|(DT_PTR<<N_BTSHFT)|(x&N_BTMASK))
-
- #define DECREF(x) ((((x)>>N_TSHIFT)&~N_BTMASK)|((x)&N_BTMASK))
-
- /*
- * AUXILIARY ENTRY FORMAT
- */
-
- union auxent
- {
- struct
- {
- long x_tagndx; /* str, un, or enum tag indx */
- union
- {
- struct
- {
- unsigned short x_lnno; /* declaration line number */
- unsigned short x_size; /* str, union, array size */
- } x_lnsz;
- long x_fsize; /* size of function */
- } x_misc;
- union
- {
- struct /* if ISFCN, tag, or .bb */
- {
- long x_lnnoptr; /* ptr to fcn line # */
- long x_endndx; /* entry ndx past block end */
- } x_fcn;
- struct /* if ISARY, up to 4 dimen. */
- {
- unsigned short x_dimen[DIMNUM];
- } x_ary;
- } x_fcnary;
- unsigned short x_tvndx; /* tv index */
- #if defined(m88k)
- char x_pad1; /* pad to 4 byte multiple */
- char x_pad2; /* pad to 4 byte multiple */
- #endif
- } x_sym;
- struct
- {
- char x_fname[FILNMLEN];
- } x_file;
- struct
- {
- long x_scnlen; /* section length */
- unsigned short x_nreloc; /* number of relocation entries */
- unsigned short x_nlinno; /* number of line numbers */
- } x_scn;
-
- struct
- {
- long x_tvfill; /* tv fill value */
- unsigned short x_tvlen; /* length of .tv */
- unsigned short x_tvran[2]; /* tv range */
- } x_tv; /* info about .tv section (in auxent of symbol .tv)) */
- };
-
- #define SYMENT struct syment
- #define AUXENT union auxent
-
- #if defined(m88k)
- #define SYMESZ sizeof(SYMENT)
- #define AUXESZ sizeof(AUXENT)
- #else
- #define SYMESZ 18
- #define AUXESZ 18
- #endif
-
- /* Defines for "special" symbols */
-
- #if defined(__STDC__)
-
- #if #machine(m88k)
- #define _ETEXT "_etext"
- #define _EDATA "_edata"
- #define _END "_end"
- #else
- #define _ETEXT "etext"
- #define _EDATA "edata"
- #define _END "end"
- #endif
-
- #else
- #if m88k
- /* XXX_INTERIM
- * The new BCS doesn't have leading underscores! Change this when
- * we get a coff compiler that doesn't generate them.
- */
-
- #define _ETEXT "_etext"
- #define _EDATA "_edata"
- #define _END "_end"
-
- #else
- #define _ETEXT "etext"
- #define _EDATA "edata"
- #define _END "end"
- #endif
-
- #endif /* __STDC__ */
-
- #define _START "_start"
-
- #if defined(m88k)
- #define _TVORIG "_tvorig"
- #define _TORIGIN "_torigin"
- #define _DORIGIN "_dorigin"
- #define _SORIGIN "_sorigin"
- #endif
- #endif /* _SYMS_H */
-