usr/src/cmd/pi/pc.h

/* Copyright (c) 1979 Regents of the University of California */

/* static       char sccsid[] = "@(#)pc.h 1.3 4/1/81"; */

    /*
     *          random constants for pc
     */

    /*
     *  the name of the display.
     */
#define DISPLAYNAME     "__disply"

    /*
     *  the structure below describes the locals used by the run time system.
     *  at function entry, at least this much space is allocated,
     *  and the following information is filled in:
     *  the address of a routine to close the current frame for unwinding,
     *  a pointer to the display entry for the current static level and
     *  the previous contents of the display for this static level.
     *  the curfile location is used to point to the currently active file,
     *  and is filled in as io is initiated.
     *  one of these structures is allocated on the (negatively growing) stack.
     *  at function entry, fp is set to point to the last field of the struct,
     *  thus the offsets of the fields are as indicated below.
     */
struct rtlocals {
    struct iorec        *curfile;
    struct dispsave     dsave;
    struct dispsave     *dptr;
    int                 (*unwind)();
} rtlocs;
#define CURFILEOFFSET   ( ( -sizeof rtlocs ) + sizeof rtlocs.unwind )
#define DSAVEOFFSET     ( CURFILEOFFSET + sizeof rtlocs.curfile )
#define DPTROFFSET      ( DSAVEOFFSET + sizeof rtlocs.dsave )
#define UNWINDOFFSET    ( DPTROFFSET + sizeof rtlocs.dptr )
#define UNWINDNAME      "_UNWIND"

    /*
     *  the register save mask for saving no registers
     */
#define RSAVEMASK       ( 0 )

    /*
     *  runtime check mask for divide check and integer overflow
     */
#define RUNCHECK        ( ( 1 << 15 ) | ( 1 << 14 ) )

    /*
     *  formats for various names
     *      NAMEFORMAT          arbitrary length strings.
     *      EXTFORMAT           for externals, a preceding underscore.
     *      PREFIXFORMAT        used to print made up names with prefixes.
     *      LABELPREFIX         with getlab() makes up label names.
     *      LLABELPREFIX        with getlab() makes up sdb labels.
     *      FORMALPREFIX        prefix for EXTFORMAT for formal entry points.
     *  a typical use might be to print out a name with a preceeding underscore
     *  with putprintf( EXTFORMAT , 0 , name );
     */
#define NAMEFORMAT      "%s"
#define EXTFORMAT       "_%s"
#define PREFIXFORMAT    "%s%d"
#define LABELPREFIX     "L"
#define LLABELPREFIX    "LL"
#define FORMALPREFIX    "__"

    /*
     *  the name of the statement counter
     */
#define STMTCOUNT       "__stcnt"

    /*
     *  the name of the pcp counters
     */
#define PCPCOUNT        "__pcpcount"

    /*
     *  a vector of pointer to enclosing functions for fully qualified names.
     */
char    *enclosing[ DSPLYSZ ];

    /*
     *  and of course ...
     */
#define BITSPERBYTE     8

    /*
     *  error number for case label not found (ECASE)
     *  stolen from ~mckusick/px/lib/h01errs.h
     */
#define ECASE           5