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/* @(#)sym.h	2.3 */
#define isymNil	-1L
#define isym0	0L

#define bitHigh	(0x80000000)

/* magic number definitions */
#define magicImpure	0407            /* impure format */
#define magicReadOnly	0410            /* read-only text */
#define magicDemand	0413            /* demand load format */
#define	magicLpd	0401		/* lpd (UNIX/RT) */
#define	magicSplit	0411		/* separated I&D */
#define	magicOverlay	0405		/* overlay */

#ifdef SYSIII
#ifndef REGULUS

/* stuff directly related to the symbol table */
struct	exec {	/* a.out header */
	short	a_magic;	/* magic number */
	uint	a_text;		/* size of text segment */
	uint	a_data;		/* size of initialized data */
	uint	a_bss;		/* size of uninitialized data */
	uint	a_syms;		/* size of symbol table */
	uint	a_entry;	/* entry point */
	uint	a_stamp;	/* system environment stamp */
	uint	a_flag;		/* relocation info stripped */
};

/* ***** in invocation of BADMAG macro, argument should not be a function.***/
#define	FBadMagic(X) (X.a_magic!=magicReadOnly && X.a_magic!=magicImpure \
		   && X.a_magic!=magicLpd && X.a_magic!=magicSplit \
		   && X.a_magic!=magicOverlay)

#define CbTextOffset(x) (cbEXECR)
#define CbSymOffset(x) ((x).a_text + (x).a_data + CbTextOffset(x))

/* values for type flag */
#define	N_UNDF	0	/* undefined */
#define	N_ABS	01	/* absolute */
#define	N_TEXT	02	/* text symbol */
#define	N_DATA	03	/* data symbol */
#define	N_BSS	04	/* bss symbol */
#define	N_TYPE	037	/* gets JUST the type bits (removes N_EXT) */
#define	N_REG	024	/* register name */
#define	N_FN	037	/* file name symbol */
#define	N_EXT	040	/* external bit, or'ed in */

typedef struct SYMS {	/* same record as `nlist, but with my names */
	char	sbSym[8];	/* symbol name */
	short	type;		/* type flag */
	uint	value;		/* something appropriate to the type */
	} SYMR, *pSYMR;
#define cbSYMR sizeof(SYMR)

/* then following is replaced by a procedure for BSD41 - see sym.c */
#define SbInCore(sb) (sb)
/* end of normal SYSIII */

#else

/* stuff directly related to the symbol table */
struct	exec {	/* a.out header */
	short	a_magic;	/* magic number */
	long	a_text;		/* size of text segment */
	long	a_data;		/* size of initialized data */
	long	a_bss;		/* size of uninitialized data */
	long	a_syms;		/* size of symbol table */
	long	a_stksize;	/* stack size */
	long	a_entry;	/* entry point */
	short	a_flag;		/* relocation info stripped */
};

#define	A_MAGIC1	0x601a		/* normal */
#define	A_MAGIC0	0x601c		/* shared text - 2k boundaries */
#define	A_MAGIC2	0x601d		/* separated I&D */
#define	A_MAGIC3	0x601e		/* shared text - 4k boundaries */
/* ***** in invocation of BADMAG macro, argument should not be a function.***/
#define	FBadMagic(X) (X.a_magic!=A_MAGIC1 && X.a_magic!=A_MAGIC2 \
		   && X.a_magic!=A_MAGIC3 && X.a_magic!=A_MAGIC0)

#define CbTextOffset(x) (cbEXECR)
#define CbSymOffset(x) (CbTextOffset(x) + (x).a_text + (x).a_data)

/* values for type flag */
#define	N_UNDF	0	/* undefined */
#define	N_ABS	040000	/* absolute */
#define	N_TEXT	01000	/* text symbol */
#define	N_DATA	02000	/* data symbol */
#define	N_BSS	0400	/* bss symbol */
#define	N_TYPE	053600	/* gets JUST the type bits (removes N_EXT) */
#define	N_REG	010000	/* register name */
#define	N_FN	0200	/* file name symbol */
#define	N_EXT	020000	/* external bit, or'ed in */

typedef struct SYMS {	/* same record as `nlist, but with my names */
	char	sbSym[8];	/* symbol name */
	short	type;		/* type flag */
	ulong	value;		/* something appropriate to the type */
	} SYMR, *pSYMR;
#define cbSYMR sizeof(SYMR)

/* then following is replaced by a procedure for BSD41 - see sym.c */
#define SbInCore(sb) (sb)
/* end of REGULUS */
#endif
/* end of SYSIII stuff */
#endif

#ifdef BSD41
extern char * SbInCore();

struct exec {
        long    a_magic;        /* magic number */
	ulong   a_text;         /* size of text segment */
	ulong   a_data;         /* size of initialized data */
	ulong   a_bss;          /* size of uninitialized data */
	ulong   a_syms;         /* size of symbol table */
	ulong   a_entry;        /* entry point */
	ulong   a_trsize;       /* size of text relocation */
	ulong   a_drsize;       /* size of data relocation */
};

#define FBadMagic(x) \
    (((x).a_magic)!=magicImpure \
    && ((x).a_magic)!=magicReadOnly \
    && ((x).a_magic)!=magicDemand)

#ifdef SUN
#define CbTextOffset(x) ((x).a_magic==magicDemand ? 2048 : cbEXECR)
#else
#define CbTextOffset(x) ((x).a_magic==magicDemand ? 1024 : cbEXECR)
#endif

#define CbSymOffset(x) \
        (CbTextOffset(x) + (x).a_text+(x).a_data + (x).a_trsize+(x).a_drsize)
#define CbStrOffset(x) (CbSymOffset(x) + (x).a_syms)

typedef struct  SYMS {	/* berkeley `nlist', almost */
	long    sbSym;		/* not an `sb', an index into string space */
	uchar   type;		/* type flag, i.e. N_TEXT etc; see below */
        char    other;		/* unused */
        short   desc;		/* see <stab.h> */
	ulong   value;		/* value of this symbol (or sdb offset) */
	} SYMR, *pSYMR;
#define cbSYMR sizeof(SYMR)

/*
 * Simple values for n_type.
 */
#define N_UNDF  0x0		/* undefined */
#define N_ABS   0x2		/* absolute */
#define N_TEXT  0x4		/* text */
#define N_DATA  0x6		/* data */
#define N_BSS   0x8		/* bss */
#define N_FN    0x1f		/* file name symbol */

#define N_EXT   01		/* external bit, or'ed in */
#define N_TYPE  0x1e		/* mask for all the type bits */

#define N_STAB  0xe0		/* if any of these bits set, a SDB entry */
/* end of BSD41 */
#endif

#define symNil ((pSYMR)0)

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