/*
 *  DAS/SECT.H
 *
 *
 *    (c)Copyright 1992-1997 Obvious Implementations Corp.  Redistribution and
 *    use is allowed under the terms of the DICE-LICENSE FILE,
 *    DICE-LICENSE.TXT.
 */

#define SECTBLKSIZE	8192	/*  allocation size */

/*
 *  Relocation and section information.  The section is broken up into
 *  relocation lists for byte, word, and long relocations for local and
 *  external symbols.  Each list itself is kept sorted by the SECTION HUNK THE
 *  LOCAL OR EXTERNAL LABEL BELONGS TO.
 *
 *  labels exported from this section are placed on the export list.  Labels
 *  imported into this section are listed via the Reloc lists.
 */

typedef struct Reloc {
    struct Reloc *RNext;
    Label   *Label;		/*  label we are referencing		    */
    long    Offset;		/*  offset in section of item to be relocd  */
} Reloc;

typedef struct DBlock {
    struct DBlock *Next;
    long    Size;
    long    Max;
    void    *Data;
} DBlock;

#define RELOC_ABSOLUTE	0x0000
#define RELOC_DATAREL	0x0100
#define RELOC_PCREL	0x0200

#define SECT_DUMMY  0
#define SECT_CODE   1
#define SECT_DATA   2
#define SECT_BSS    3
#define SECT_ABS    4
#define SECT_COMMON 5

typedef struct Sect {
    struct Sect *Next;
    short   Hunk;	    /*	starts at 0	    */
    short   Type;	    /*	code, data, bss, abs*/
    long    HunkMask;
    char    *Name;	    /*	section name	    */
    long    Addr;	    /*	current addr in sect*/

    long    ObjLen;	    /*	size of generated code/data	    */
    long    DebugLen;	    /*	debug entries			    */
    long    DebugIdx;
    DBlock  *Block;	    /*	linked list of generated code/data. NULL if bss */
    DBlock  *LastBlock;     /*	for appending...		    */

    Reloc   *RelocAry[10];
    Label   *XDefLab;	    /*	exported		*/
    struct DebugNode   *DebugAry;
} Sect;

#define RA_EXT	5

#define r_ByteReloc	    RelocAry[0]
#define r_WordRelocPc	    RelocAry[1]
#define r_LongReloc	    RelocAry[2]
#define r_WordDataReloc     RelocAry[3]
#define r_LongRelocPc	    RelocAry[4]
#define r_ExtByteReloc	    RelocAry[5]
#define r_ExtWordRelocPc    RelocAry[6]
#define r_ExtLongReloc	    RelocAry[7]
#define r_ExtWordDataReloc  RelocAry[8]
#define r_ExtLongRelocPc    RelocAry[9]

extern Sect    *CurSection;	/*  current section	*/
extern Sect    *SectBase;	/*  list of sections	*/