path: root/sdas/asxxsrc/asdata.c

/* asdata.c */

/*
 *  Copyright (C) 1989-2010  Alan R. Baldwin
 *
 *  This program is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 *
 * Alan R. Baldwin
 * 721 Berkeley St.
 * Kent, Ohio  44240
 *
 *   With enhancements from
 *
 *      John L. Hartman (JLH)
 *      jhartman@compuserve.com
 *
 *      Bill McKinnon (BM)
 *      w_mckinnon@conknet.com
 *
 *      Mike McCarty
 *      mike dot mccarty at sbcglobal dot net
 */

#include "asxxxx.h"

/*)Module       asdata.c
 *
 *      The module asdata.c contains the global constants,
 *      structures, and variables used in the assembler.
 */

int     aserr;          /*      ASxxxx error counter
                         */
jmp_buf jump_env;       /*      compiler dependent structure
                         *      used by setjmp() and longjmp()
                         */

/*
 *      The asmf structure contains the information
 *      pertaining to an assembler source file/macro.
 *
 * The Parameters:
 *      next    is a pointer to the next object in the linked list
 *      objtyp  specifies the object type - T_ASM, T_INCL, T_MACRO
 *      line    is the saved line number of the parent object
 *      fp      is the source FILE handle
 *      afp     is the file path length (excludes the files name.ext)
 *      afn[]   is the assembler/include file path/name.ext
 *
 *      struct  asmf
 *      {
 *              struct  asmf *next;     Link to Next Object
 *              int     objtyp;         Object Type
 *              int     line;           Saved Line Counter
 *              int     flevel;         saved flevel
 *              int     tlevel;         saved tlevel
 *              int     lnlist;         saved lnlist
 *              FILE *  fp;             FILE Handle
 *              int     afp;            File Path Length
 *              char    afn[FILSPC];    File Name
 *      };
 */
struct  asmf    *asmp;  /*      The pointer to the first assembler
                         *      source file structure of a linked list
                         */
struct  asmf    *asmc;  /*      Pointer to the current
                         *      source input structure
                         */
struct  asmf    *asmi;  /*      Queued pointer to an include file
                         *      source input structure
                         */
struct  asmf    *asmq;  /*      Queued pointer to a macro
                         *      source input structure
                         */

/*
 *      The mcrdef structure contains the
 *      information about a macro definition.
 *
 *      When the macro is defined the definition
 *      arguments are packed into a linked list of
 *      strings beginning with bgnarg and ending with
 *      endarg. The number of args is placed in narg.
 *
 *      When the macro is invoked the expansion
 *      argument strings are placed into a linked
 *      list of strings beginning with bgnxrg and
 *      ending with endxrg. The number of expansion
 *      arguments is placed in xarg.
 *
 * The Parameters:
 *      next    is a pointer to the next macro definition structure
 *      name    is a pointer to the macro name string
 *      bgnlst  is a pointer to the first text line of the macro
 *      endlst  is a pointer to the last  text line of the macro
 *      type    is the macro type - .macro, .irp, .irpc, or .rept
 *      rptcnt  is the repeat count for the macro
 *      nest    is the macro nesting counter
 *      narg    is the number of macro definition arguments
 *      bgnarg  is a pointer to the first definition argument string
 *      endarg  is a pointer to the last  definition argument string
 *      xarg    is the number of expansion arguments at macro invocation
 *      bgnxrg  is a pointer to the first expansion argument string
 *      endxrg  is a pointer to the last  expansion argument string
 *
 *      struct  mcrdef {
 *              struct mcrdef * next;           link to next macro definition
 *              char *          name;           pointer to the macro name
 *              struct strlst * bgnlst;         link to first text line of macro
 *              struct strlst * endlst;         link to last text line of macro
 *              int             type;           macro type
 *              int             rptcnt;         repeat counter
 *              int             nest;           macro nesting counter
 *              int             narg;           number of macro defintion arguments
 *              struct strlst * bgnarg;         link to first macro defintion argument
 *              struct strlst * endarg;         link to last macro definition argument
 *              int             xarg;           number of macro expansion arguments
 *              struct strlst * bgnxrg;         link to first macro expansion argument
 *              struct strlst * endxrg;         link to last macro xpansion argument
 *      };
 */
struct mcrdef * mcrlst; /*      link to list of defined macros
                         */
struct mcrdef * mcrp;   /*      link to list of defined macros
                         */

/*
 *      The memlnk structure is a linked list
 *      of memory allocations.
 *
 *      The function new() uses the memlnk structure
 *      to create a linked list of allocated memory
 *      that can be traversed by asfree() to release
 *      the allocated memory.
 *
 *      The function mhunk() uses the memlnk structure
 *      to create a linked list of allocated memory
 *      that can be reused.
 *
 * The Parameters:
 *      next    is a pointer to the next memlnk structure.
 *      ptr     is a pointer to the allocated memory.
 *
 *      struct  memlnk {
 *              struct memlnk * next;           link to next memlnk
 *              VOID *          ptr;            pointer to allocated memory
 *      };
 */
struct memlnk * pmcrmem;/*      First Macro Memory Allocation Structure
                         */
struct memlnk * mcrmem; /*      Macro Memory Allocation Structure
                         */
int     mcrblk;         /*      new data blocks allocated
                         */
int     incfil;         /*      include file nesting counter
                         */
int     maxinc;         /*      maximum include file nesting encountered
                         */
int     mcrfil;         /*      macro nesting counter
                         */
int     maxmcr;         /*      maximum macro nesting encountered
                         */
int     flevel;         /*      IF-ELSE-ENDIF flag will be non
                         *      zero for false conditional case
                         */
int     ftflevel;       /*      IIFF-IIFT-IIFTF FLAG
                         */
int     tlevel;         /*      current conditional level
                         */
int     lnlist;         /*      LIST-NLIST options
                         */
int     ifcnd[MAXIF+1]; /*      array of IF statement condition
                         *      values (0 = FALSE) indexed by tlevel
                         */
int     iflvl[MAXIF+1]; /*      array of IF-ELSE-ENDIF flevel
                         *      values indexed by tlevel
                         */
char    afn[FILSPC];    /*      current input file specification
                         */
int     afp;            /*      current input file path length
                         */
char    afntmp[FILSPC]; /*      temporary input file specification
                         */
int     afptmp;         /*      temporary input file path length
                         */
int     srcline;        /*      current source line number
                         */
int     asmline;        /*      current assembler file line number
                         */
int     incline;        /*      current include file line number
                         */
int     mcrline;        /*      current macro line number
                         */
int     radix;          /*      current number conversion radix:
                         *      2 (binary), 8 (octal), 10 (decimal),
                         *      16 (hexadecimal)
                         */
int     line;           /*      current assembler source
                         *      line number
                         */
int     page;           /*      current page number
                         */
int     lop;            /*      current line number on page
                         */
int     pass;           /*      assembler pass number
                         */
int     aflag;          /*      -a, make all symbols global flag
                         */
int     bflag;          /*      -b(b), listing modes flag
                         */
int     cflag;          /*      -c, disable cycle counts in listing flag
                         */
int     fflag;          /*      -f(f), relocations flagged flag
                         */
int     gflag;          /*      -g, make undefined symbols global flag
                         */
int     jflag;          /*      -j, generate debug information flag
                         */
int     lflag;          /*      -l, generate listing flag
                         */
int     oflag;          /*      -o, generate relocatable output flag
                         */
int     pflag;          /*      -p, disable listing pagination
                         */
int     sflag;          /*      -s, generate symbol table flag
                         */
int     uflag;          /*      -u, disable .list/.nlist processing flag
                         */
int     wflag;          /*      -w, enable wide listing format
                         */
int     xflag;          /*      -x, listing radix flag
                         */
int     yflag;          /*      -y, enable SDCC Debug Symbols
                         */
int     zflag;          /*      -z, disable symbol case sensitivity
                         */
int     waddrmode;      /*      WORD Address mode flag
                         */
int     a_bytes;        /*      REL file T Line address length
                         */
a_uint  a_mask;         /*      Address Mask
                         */
a_uint  s_mask;         /*      Sign Mask
                         */
a_uint  v_mask;         /*      Value Mask
                         */
a_uint  laddr;          /*      address of current assembler line
                         *      or value of .if argument
                         */
a_uint  fuzz;           /*      tracks pass to pass changes in the
                         *      address of symbols caused by
                         *      variable length instruction formats
                         */
int     lmode;          /*      listing mode
                         */
char    *ep;            /*      pointer into error list
                         *      array eb[NERR]
                         */
char    eb[NERR];       /*      array of generated error codes
                         */
char    *ip;            /*      pointer into the assembler-source
                         *      text line in ib[]
                         */
char    *ib;            /*      assembler-source text line for processing
                         */
char    *ic;            /*      assembler-source text line for listing
                         */
char    *cp;            /*      pointer to assembler output
                         *      array cb[]
                         */
char    cb[NCODE];      /*      array of assembler output values
                         */
int     *cpt;           /*      pointer to assembler relocation type
                         *      output array cbt[]
                         */
int     cbt[NCODE];     /*      array of assembler relocation types
                         *      describing the data in cb[]
                         */
int     opcycles;       /*      opcode execution cycles
                         */
char    tb[NTITL];      /*      Title string buffer
                         */
char    stb[NSBTL];     /*      Subtitle string buffer
                         */
char    erb[NINPUT+4];  /*      Error string buffer
                         */

char    symtbl[] = { "Symbol Table" };
char    aretbl[] = { "Area Table" };

char    module[NCPS+2]; /*      module name string
                         */
/* sdas specific */
int     org_cnt;        /*      .org directive counter
                         */
char    *optsdcc;       /*      sdcc compile options
                         */
/* end sdas specific */

/*
 *      The mne structure is a linked list of the assembler
 *      mnemonics and directives.  The list of mnemonics and
 *      directives contained in the device dependent file
 *      xxxpst.c are hashed and linked into NHASH lists in
 *      module assym.c by syminit().  The structure contains
 *      the mnemonic/directive name, a subtype which directs
 *      the evaluation of this mnemonic/directive, a flag which
 *      is used to detect the end of the mnemonic/directive
 *      list in xxxpst.c, and a value which is normally
 *      associated with the assembler mnemonic base instruction
 *      value.
 *
 *      struct  mne
 *      {
 *              struct  mne *m_mp;      Hash link
 *              char *  m_id;           Mnemonic (JLH)
 *              char    m_type;         Mnemonic subtype
 *              char    m_flag;         Mnemonic flags
 *              a_uint  m_valu;         Value
 *      };
 */
struct  mne     *mnehash[NHASH];

/*
 *      The sym structure is a linked list of symbols defined
 *      in the assembler source files.  The first symbol is "."
 *      defined here.  The entry 'struct tsym *s_tsym'
 *      links any temporary symbols following this symbol and
 *      preceeding the next normal symbol.  The structure also
 *      contains the symbol's name, type (USER or NEW), flag
 *      (global, assigned, and multiply defined), a pointer
 *      to the area structure defining where the symbol is
 *      located, a reference number assigned by outgsd() in
 *      asout.c, and the symbols address relative to the base
 *      address of the area where the symbol is located.
 *
 *      struct  sym
 *      {
 *              struct  sym  *s_sp;     Hash link
 *              struct  tsym *s_tsym;   Temporary symbol link
 *              char    *s_id;          Symbol (JLH)
 *              char    s_type;         Symbol subtype
 *              char    s_flag;         Symbol flags
 *              struct  area *s_area;   Area line, 0 if absolute
 *              int     s_ref;          Ref. number
 *              a_uint  s_addr;         Address
 * sdas specific
 *              a_uint  s_org;          Start Address if absolute
 * end sdas specific
 *      };
 */
struct  sym     sym[] = {
    {   NULL,   NULL,   ".",        S_USER, 0,                  NULL,   0,  0,  0 },
    {   NULL,   NULL,   ".__.ABS.", S_USER, S_ASG|S_GBL,        NULL,   0,  0,  0 },
    {   NULL,   NULL,   ".__.CPU.", S_USER, S_ASG|S_LCL,        NULL,   0,  0,  0 },
    {   NULL,   NULL,   ".__.H$L.", S_USER, S_ASG|S_LCL,        NULL,   0,  0,  0 },
    {   NULL,   NULL,   ".__.$$$.", S_USER, S_ASG|S_LCL|S_EOL,  NULL,   0,  0,  0 }
};

struct  sym     *symp;          /*      pointer to a symbol structure
                                 */
struct  sym *symhash[NHASH];    /*      array of pointers to NHASH
                                 *      linked symbol lists
                                 */

/*
 *      The area structure contains the parameter values for a
 *      specific program or data section.  The area structure
 *      is a linked list of areas.  The initial default area
 *      is "_CODE" defined here, the next area structure
 *      will be linked to this structure through the structure
 *      element 'struct area *a_ap'.  The structure contains the
 *      area name, area reference number ("_CODE" is 0) determined
 *      by the order of .area directives, area size determined
 *      from the total code and/or data in an area, area fuzz is
 *      a variable used to track pass to pass changes in the
 *      area size caused by variable length instruction formats,
 *      and area flags which specify the area's relocation type.
 *
 *      struct  area
 *      {
 *              struct  area *a_ap;     Area link
 *              char *  a_id;           Area Name
 *              int     a_ref;          Reference number
 *              a_uint  a_size;         Area size
 *              a_uint  a_fuzz;         Area fuzz
 *              int     a_flag;         Area flags
 *      };
 */
struct  area    area[] = {
    {NULL,      "_CODE",        0,      0,      0,      A_CON|A_REL}
};

struct  area    *areap; /*      pointer to an area structure
                         */

FILE    *lfp;           /*      list output file handle
                         */
FILE    *ofp;           /*      relocation output file handle
                         */
FILE    *tfp;           /*      symbol table output file handle
                         */
char    txt[NTXT];      /*      T Line Values
                         */
char    rel[NREL];      /*      R Line Values
                         */
char    *txtp = &txt[0];/*      Pointer to T Line Values
                         */
char    *relp = &rel[0];/*      Pointer to R Line Values
                         */

/*
 *      an array of character types,
 *      one per ASCII character
 */
unsigned char   ctype[128] = {
/*NUL*/ ILL,    ILL,    ILL,    ILL,    ILL,    ILL,    ILL,    ILL,
/*BS*/  ILL,    SPACE,  ILL,    ILL,    SPACE,  ILL,    ILL,    ILL,
/*DLE*/ ILL,    ILL,    ILL,    ILL,    ILL,    ILL,    ILL,    ILL,
/*CAN*/ ILL,    ILL,    ILL,    ILL,    ILL,    ILL,    ILL,    ILL,
/*SPC*/ SPACE,  ETC,    ETC,    ETC,    LETTER, BINOP,  BINOP,  ETC,
/*(*/   ETC,    ETC,    BINOP,  BINOP,  ETC,    BINOP,  LETTER, BINOP,
/*0*/   DGT2,   DGT2,   DGT8,   DGT8,   DGT8,   DGT8,   DGT8,   DGT8,
/*8*/   DGT10,  DGT10,  ETC,    ETC,    BINOP,  ETC,    BINOP,  ETC,
/*@*/   ETC,    LTR16,  LTR16,  LTR16,  LTR16,  LTR16,  LTR16,  LETTER,
/*H*/   LETTER, LETTER, LETTER, LETTER, LETTER, LETTER, LETTER, LETTER,
/*P*/   LETTER, LETTER, LETTER, LETTER, LETTER, LETTER, LETTER, LETTER,
/*X*/   LETTER, LETTER, LETTER, BINOP,  ETC,    ETC,    BINOP,  LETTER,
/*`*/   ETC,    LTR16,  LTR16,  LTR16,  LTR16,  LTR16,  LTR16,  LETTER,
/*h*/   LETTER, LETTER, LETTER, LETTER, LETTER, LETTER, LETTER, LETTER,
/*p*/   LETTER, LETTER, LETTER, LETTER, LETTER, LETTER, LETTER, LETTER,
/*x*/   LETTER, LETTER, LETTER, ETC,    BINOP,  ETC,    ETC,    ETC
};

/*
 *      an array of characters which
 *      perform the case translation function
 */
char    ccase[128] = {
/*NUL*/ '\000', '\001', '\002', '\003', '\004', '\005', '\006', '\007',
/*BS*/  '\010', '\011', '\012', '\013', '\014', '\015', '\016', '\017',
/*DLE*/ '\020', '\021', '\022', '\023', '\024', '\025', '\026', '\027',
/*CAN*/ '\030', '\031', '\032', '\033', '\034', '\035', '\036', '\037',
/*SPC*/ '\040', '\041', '\042', '\043', '\044', '\045', '\046', '\047',
/*(*/   '\050', '\051', '\052', '\053', '\054', '\055', '\056', '\057',
/*0*/   '\060', '\061', '\062', '\063', '\064', '\065', '\066', '\067',
/*8*/   '\070', '\071', '\072', '\073', '\074', '\075', '\076', '\077',
/*@*/   '\100', '\141', '\142', '\143', '\144', '\145', '\146', '\147',
/*H*/   '\150', '\151', '\152', '\153', '\154', '\155', '\156', '\157',
/*P*/   '\160', '\161', '\162', '\163', '\164', '\165', '\166', '\167',
/*X*/   '\170', '\171', '\172', '\133', '\134', '\135', '\136', '\137',
/*`*/   '\140', '\141', '\142', '\143', '\144', '\145', '\146', '\147',
/*h*/   '\150', '\151', '\152', '\153', '\154', '\155', '\156', '\157',
/*p*/   '\160', '\161', '\162', '\163', '\164', '\165', '\166', '\167',
/*x*/   '\170', '\171', '\172', '\173', '\174', '\175', '\176', '\177'
};