/* aslink.h */

/*
 *  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
 */

/*
 * System Include Files
 */

#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include "sdld.h"

/*
 * Local Definitions
 */

#define VERSION "V03.00 + NoICE + sdld"

/*
 * To include NoICE Debugging set non-zero
 */
#define NOICE   1

/*
 * To include SDCC Debugging set non-zero
 */
#define SDCDB   1

/*
 * The assembler requires certain variables to have
 * at least 32 bits to allow correct address processing.
 *
 * The type INT32 is defined so that compiler dependent
 * variable sizes may be specified in one place.
 *
 * LONGINT is defined when INT32 is 'long' to
 * select the 'l' forms for format strings.
 */

/* Turbo C++ 3.0 for DOS */
/* 'int' is 16-bits, 'long' is 32-bits */

#ifdef  __TURBOC__
#define         INT32   long
#define         LONGINT
#endif

/* Symantec C++ V6.x/V7.x for DOS (not DOSX) */
/* 'int' is 16-bits, 'long' is 32-bits */

#ifdef  __SC__
#define         INT32   long
#define         LONGINT
#endif

/* The DEFAULT is 'int' is 32 bits */
#ifndef INT32
#define         INT32   int
#endif


/*)Module       aslink.h
 *
 *      The module aslink.h contains the definitions for constants,
 *      structures, global variables, and LKxxxx functions
 *      contained in the LKxxxx.c files.
 */

/*)BUILD
        $(PROGRAM) =    ASLINK
        $(INCLUDE) =    ASLINK.H
        $(FILES) = {
                LKMAIN.C
                LKLEX.C
                LKAREA.C
                LKBANK.C
                LKHEAD.C
                LKSYM.C
                LKEVAL.C
                LKDATA.C
                LKLIST.C
                LKNOICE.C
                LKSDCDB.C
                LKRLOC.C
                LKRLOC3.C
                LKLIBR.C
                LKOUT.C
                LKS19.C
        }
        $(STACK) = 2000
*/

#if defined  DECUS
/* DECUS C void definition */
/* File/extension seperator */

#define VOID        char
#define FSEPX       '.'

#elif defined  PDOS
/* PDOS C void definition */
/* File/extension seperator */

#define VOID        char
#define FSEPX       ':'

#elif defined UNIX
/* UNIX void definition */
/* File/extension seperator */

#define VOID        void
#define FSEPX       '.'
#define LKDIRSEP    '/'
#define LKDIRSEPSTR "/"
#define OTHERSYSTEM

#else
/* DOS/WINDOWS void definition */
/* File/extension seperator */

#define VOID        void
#define FSEPX       '.'
#define LKDIRSEP    '\\'
#define LKDIRSEPSTR "\\"
#define OTHERSYSTEM

#endif

/*
 * PATH_MAX
 */
#include <limits.h>
#ifndef PATH_MAX                /* POSIX, but not required   */
 #if defined(__BORLANDC__) || defined(_MSC_VER)
  #include <stdlib.h>
  #define PATH_MAX      _MAX_PATH
 #else
  #define PATH_MAX      255     /* define a reasonable value */
 #endif
#endif

#define LKOBJEXT        "rel"

/*
 * Global symbol types.
 */
#define S_REF   1               /* referenced */
#define S_DEF   2               /* defined */

/*
 * File types
 */
#define F_OUT   0               /* File.ixx / File.sxx */
#define F_STD   1               /* stdin */
#define F_LNK   2               /* File.lnk */
#define F_REL   3               /* File.rel */

/*
 * Error definitions
 */
#define ER_NONE         0       /* No error */
#define ER_WARNING      1       /* Warning */
#define ER_ERROR        2       /* Assembly error */
#define ER_FATAL        3       /* Fatal error */

/*
 * This file defines the format of the
 * relocatable binary file.
 */

#define NCPS    PATH_MAX        /* characters per symbol */
#define NINPUT  PATH_MAX        /* Input buffer size */
#define NHASH   (1 << 6)        /* Buckets in hash table */
#define HMASK   (NHASH - 1)     /* Hash mask */
#define NLPP    60              /* Lines per page */
#define NMAX    78              /* IXX/SXX/DBX Buffer Length */
#define         IXXMAXBYTES     32      /* NMAX > (2 * IXXMAXBYTES) */
#define         SXXMAXBYTES     32      /* NMAX > (2 * SXXMAXBYTES) */
#define         DBXMAXBYTES     64      /* NMAX > (  DBXMAXBYTES  ) */
#define FILSPC  PATH_MAX        /* File spec length */

#define NDATA   16              /* actual data */
/*
 * NTXT must be defined to have the same value in
 * the ASxxxx assemblers and ASLink.
 *
 * The R Line coding allows only 4-bits for coding
 * the T Line index.  The MAXIMUM value for NTXT
 * is 16.  It should not be changed.
 */
#define NTXT    16              /* T values */

/*
 * Internal ASxxxx Version Variable
 */
extern  int     ASxxxx_VERSION;


/*
 *      ASLINK - Version 3 Definitions
 */

/*
 *      The "A3_" area constants define values used in
 *      generating the assembler area output data.
 *
 * Area flags
 *
 *         7     6     5     4     3     2     1     0
 *      +-----+-----+-----+-----+-----+-----+-----+-----+
 *      |     |     |     | PAG | ABS | OVR |     |     |
 *      +-----+-----+-----+-----+-----+-----+-----+-----+
 */

#define A3_CON    000           /* concatenate */
#define A3_OVR    004           /* overlay */
#define A3_REL    000           /* relocatable */
#define A3_ABS    010           /* absolute */
#define A3_NOPAG  000           /* non-paged */
#define A3_PAG    020           /* paged */

/* sdld specific */
/* Additional flags for 8051 address spaces */
#define A_DATA    0000          /* data space (default)*/
#define A_CODE    0040          /* code space */
#define A_XDATA   0100          /* external data space */
#define A_BIT     0200          /* bit addressable space */

/* Additional flags for hc08 */
#define A_NOLOAD  0400          /* nonloadable */
#define A_LOAD    0000          /* loadable (default) */
/* end sdld specific */

/*
 *      The "R3_" relocation constants define values used in
 *      generating the assembler relocation output data for
 *      areas, symbols, and code.
 *
 *
 *      Relocation types.
 *
 *             7     6     5     4     3     2     1     0
 *          +-----+-----+-----+-----+-----+-----+-----+-----+
 *          | MSB | PAGn| PAG0| USGN| BYT2| PCR | SYM | BYT |
 *          +-----+-----+-----+-----+-----+-----+-----+-----+
 */

#define R3_WORD  0x00           /* 16 bit */
#define R3_BYTE  0x01           /*  8 bit */

#define R3_AREA  0x00           /* Base type */
#define R3_SYM   0x02

#define R3_NORM  0x00           /* PC adjust */
#define R3_PCR   0x04

#define R3_BYT1  0x00           /* Byte count for R_BYTE = 1 */
#define R3_BYTX  0x08           /* Byte count for R_BYTE = X */

#define R3_SGND  0x00           /* Signed value */
#define R3_USGN  0x10           /* Unsigned value */

#define R3_NOPAG 0x00           /* Page Mode */
#define R3_PAG0  0x20           /* Page '0' */
#define R3_PAG   0x40           /* Page 'nnn' */

#define R3_LSB   0x00           /* output low byte */
#define R3_MSB   0x80           /* output high byte */

/*
 *      Additional "R3_" functionality is required to support
 *      some microprocesssor architectures.   The 'illegal'
 *      "R3_" mode of R3_WORD | R3_BYTX is used as a designator
 *      of the extended R3_ modes.  The extended modes replace
 *      the PAGING modes and are being added in an adhoc manner
 *      as follows:
 *
 * Extended Mode relocation flags
 *
 *         7     6     5     4     3     2     1     0
 *      +-----+-----+-----+-----+-----+-----+-----+-----+
 *      | MSB |  x  |  x  | USGN|  1  | PCR | SYM |  0  |
 *      +-----+-----+-----+-----+-----+-----+-----+-----+
 */

#define R3_ECHEK        0011            /* Extended Mode Check Bits */
#define R3_EXTND        0010            /* Extended Mode Code */
#define R3_EMASK        0151            /* Extended Mode Mask */

/* #define R3_AREA 0000 */      /* Base type */
/* #define R3_SYM  0002 */

/* #define R3_NORM 0000 */      /* PC adjust */
/* #define R3_PCR  0004 */

/* #define R3_SGND 0000 */      /* Signed value */
/* #define R3_USGN 0020 */      /* Unsigned value */

/* #define R3_LSB  0000 */      /* output low byte */
/* #define R3_MSB  0200 */      /* output high byte */

#define R3_J11     (R3_WORD|R3_BYTX)        /* JLH: 11 bit JMP and CALL (8051) */
#define R3_J19     (R3_WORD|R3_BYTX|R3_MSB) /* BM:  19 bit JMP and CALL (DS80C390) */
#define R_C24      (R3_WORD|R3_BYT1|R3_MSB) /* 24 bit address (DS80C390) */
#define R_J19_MASK (R3_BYTE|R3_BYTX|R3_MSB)

#define IS_R_J19(x) (((x) & R_J19_MASK) == R3_J19)
#define IS_R_J11(x) (((x) & R_J19_MASK) == R3_J11)
#define IS_C24(x) (((x) & R_J19_MASK) == R_C24)

/* sdld specific */
#define R_BYT3  0x100           /* if R3_BYTE is set, this is a
                                 * 3 byte address, of which
                                 * the linker must select one byte.
                                 */
#define R_HIB   0x200           /* If R3_BYTE & R_BYT3 are set, linker
                                 * will select byte 3 of the relocated
                                 * 24 bit address.
                                 */

#define R_BIT   0x400           /* Linker will convert from byte-addressable
                                 * space to bit-addressable space.
                                 */

#define R_ESCAPE_MASK   0xf0    /* Used to escape relocation modes
                                 * greater than 0xff in the .rel
                                 * file.
                                 */
/* end sdld specific */


/*
 *      ASLINK - Version 4 Definitions
 */

/*
 *      The "A4_" area constants define values used in
 *      generating the assembler area output data.
 *
 * Area flags
 *
 *         7     6     5     4     3     2     1     0
 *      +-----+-----+-----+-----+-----+-----+-----+-----+
 *      | BNK | SEG |     | PAG | ABS | OVR | WL1 | WL0 |
 *      +-----+-----+-----+-----+-----+-----+-----+-----+
 */

#define A4_BYTE         0x0000          /*  8 bit */
#define A4_WORD         0x0001          /* 16 bit */

#define A4_1BYTE        0x0000          /* 1 Byte Word Length */
#define A4_2BYTE        0x0001          /* 2 Byte Word Length */
#define A4_3BYTE        0x0002          /* 3 Byte Word Length */
#define A4_4BYTE        0x0003          /* 4 Byte Word Length */
#define A4_WLMSK        0x0003          /* Word Length Mask */

#define A4_CON          0x0400          /* Concatenating */
#define A4_OVR          0x0404          /* Overlaying */
#define A4_REL          0x0800          /* Relocatable */
#define A4_ABS          0x0808          /* absolute */
#define A4_NOPAG        0x1000          /* Non-Paged */
#define A4_PAG          0x1010          /* Paged */

#define A4_CSEG         0x4000          /* CSEG */
#define A4_DSEG         0x4040          /* DSEG */
#define A4_NOBNK        0x8000          /* Non-Banked */
#define A4_BNK          0x8080          /* Banked */

#define A4_OUT          0x0100          /* Output Code Flag */

/*
 *      The "R4_" relocation constants define values used in
 *      generating the assembler relocation output data for
 *      areas, symbols, and code.
 *
 * Note:  The PAGE modes, PCR modes, Signed, Unsigned,
 *        and MSB codes are mutually exclusive !!!
 *
 *
 * Relocation flags
 *
 *         7     6     5     4     3     2     1     0
 *      +-----+-----+-----+-----+-----+-----+-----+-----+
 *      | SYM | PCR | PAGn| PAG0| USGN| SGND| BYT1| BYT0|
 *      +-----+-----+-----+-----+-----+-----+-----+-----+
 */

#define R4_BYTE         0x0000          /*  8 bit */
#define R4_WORD         0x0001          /* 16 bit */

#define R4_1BYTE        0x0000          /* 1 Byte */
#define R4_2BYTE        0x0001          /* 2 Byte */
#define R4_3BYTE        0x0002          /* 3 Byte */
#define R4_4BYTE        0x0003          /* 4 Byte */
#define R4_BYTES        0x0003          /* Data Size */

#define R4_SGND         0x0004          /* Signed */
#define R4_USGN         0x0008          /* Unsigned */
#define R4_OVRF         0x0008          /* Overflow */

#define R4_MBRS         0x0004          /* Merge Bit Range Signed */
                                        /* An alias for Signed */
#define R4_MBRU         0x0008          /* Merge Bit Range Unsigned */
                                        /* An alias for Unsigned */
#define R4_MBRO         0x0008          /* Merge Bit Range Overflow */
                                        /* An alias for Unsigned */

#define R4_MSB          0x000C          /* MSB */
                                        /* Mutually exclusive with Signed / Unsigned */

#define R4_AREA         0x0000          /* Base type */
#define R4_SYM          0x0080

/*
 * Paging Modes:
 */

#define R4_NOPAG        0x0000          /* Page Mode */
#define R4_PBITS        0x003C          /* Paging Bits */
#define R4_PAGE         0x0030          /* Paged Addressing */
#define R4_PAG0         0x0010          /* Page '0'    .setdp */
#define R4_PAGN         0x0020          /* Page 'nnn'  .setdp */
#define R4_PAGX         0x0030          /* Page 'x', Extended Relocation Mode */
#define R4_PAGX0        0x0030          /* Page 'x', pc + 0 */
#define R4_PAGX1        0x0034          /* Page 'x', pc + 1 */
#define R4_PAGX2        0x0038          /* Page 'x', pc + 2 */
#define R4_PAGX3        0x003C          /* Page 'x', pc + 3 */

/*
 * PCR Modes:
 */

#define R4_PCR          0x0040          /* PC adjust (default)    */
#define R4_PCRN         0x0050          /* PC adjust (default) no range check */

#define R4_PCR0         0x0054          /* PC adjust (offset = 0) */
#define R4_PCR1         0x0060          /* PC adjust (offset = 1) */
#define R4_PCR2         0x0064          /* PC adjust (offset = 2) */
#define R4_PCR3         0x0068          /* PC adjust (offset = 3) */
#define R4_PCR4         0x006C          /* PC adjust (offset = 4) */

#define R4_PCR0N        0x0058          /* PC adjust (offset = 0) no range check */
#define R4_PCR1N        0x0070          /* PC adjust (offset = 1) no range check */
#define R4_PCR2N        0x0074          /* PC adjust (offset = 2) no range check */
#define R4_PCR3N        0x0078          /* PC adjust (offset = 3) no range check */
#define R4_PCR4N        0x007C          /* PC adjust (offset = 4) no range check */

/*
 * Basic Relocation Modes
 */

#define R4_NORM         0x0000          /* No Bit Positioning */


/*
 *      The defined type 'a_uint' is used for all address and
 *      unsigned variable value calculations.  Its size is
 *      required to be at least 32-bits to allow upto
 *      32-bit addressing or 32-bit value manipulation.
 */
typedef unsigned INT32 a_uint;

/*
 *      The defined type 'v_sint' is used for address and
 *      variable value calculations requiring a sign.
 *      Its size is required to be at least 32-bits to allow
 *      upto 32-bit addressing or 32-bit value manipulation.
 */
typedef signed INT32 v_sint;

/*
 *      The structures of head, mode, bank, area, areax, and sym
 *      are created as the REL files are read during the first
 *      pass of the linker.  The struct head is created upon
 *      encountering a H directive in the REL file.  The
 *      structure contains a link to a link file structure
 *      (struct lfile) which describes the file containing the H
 *      directive, a pointer to an array of merge mode
 *      definition pointers, the number of data/code areas
 *      contained in this header segment, the number of
 *      symbols referenced/defined in this header segment, a pointer
 *      to an array of pointers to areax structures (struct areax)
 *      created as each A directive is read, a pointer to an
 *      array of pointers to symbol structures (struct sym) for
 *      all referenced/defined symbols and a pointer to an array
 *      of pointers to bank structures (struct bank) referenced
 *      by this module.  As H directives are read
 *      from the REL files a linked list of head structures is
 *      created by placing a link to the new head structure
 *      in the previous head structure.
 */
struct  head
{
        struct  head  *h_hp;    /* Header link */
        struct  lfile *h_lfile; /* Associated file */
        int     h_narea;        /* # of areas */
        struct  areax **a_list; /* Area list */
        int     h_nsym; /* # of symbols */
        struct  sym   **s_list; /* Symbol list */
        int     h_nbank;        /* # of banks */
        struct  bank  **b_list; /* Bank list */
        int     h_nmode;        /* # of modes */
        struct  mode  **m_list; /* Mode list */
        char *  m_id;           /* Module name */
};

/*
 *      The MODE structure contains the specification of one of the
 *      assemblers' relocation modes.  Each assembler must specify
 *      at least one relocation mode.  The relocation specification
 *      allows arbitrarily defined active bits and bit positions.
 *      The 32 element arrays are indexed from 0 to 31.
 *      Index 0 corresponds to bit 0, ..., and 31 corresponds to bit 31
 *      of a normal integer value.
 *
 *      The value an array element defines if the normal integer bit is
 *      active (bit <7> is set, 0x80) and what destination bit
 *      (bits <4:0>, 0 - 31) should be loaded with this normal
 *      integer bit.
 *
 *      The specification for a 32-bit integer:
 *
 *      char mode_[32] = {
 *              0x80,   0x81,   0x82,   0x83,   0x84,   0x85,   0x86,   0x87,
 *              0x88,   0x89,   0x8A,   0x8B,   0x8C,   0x8D,   0x8E,   0x8F,
 *              0x90,   0x91,   0x92,   0x93,   0x94,   0x95,   0x96,   0x97,
 *              0x98,   0x99,   0x9A,   0x9B,   0x9C,   0x9D,   0x9E,   0x9F
 *      };
 *
 *
 *      The specification for the 11-bit 8051 addressing mode:
 *
 *      char mode_[32] = {
 *              0x80,   0x81,   0x82,   0x83,   0x84,   0x85,   0x86,   0x87,
 *              0x8D,   0x8E,   0x8F,   0x0B,   0x0C,   0x0D,   0x0E,   0x0F,
 *              0x10,   0x11,   0x12,   0x13,   0x14,   0x15,   0x16,   0x17,
 *              0x18,   0x19,   0x1A,   0x1B,   0x1C,   0x1D,   0x1E,   0x1F
 *      };
 *
 *
 *      m_def is the bit relocation definition array.
 *      m_flag indicates that bit position swapping is required.
 *      m_dbits contains the active bit positions for the output.
 *      m_sbits contains the active bit positions for the input.
 */
struct  mode
{
        char    m_def[32];      /* Bit Relocation Definition */
        int     m_flag;         /* Bit Swapping Flag */
        a_uint  m_dbits;        /* Destination Bit Mask */
        a_uint  m_sbits;        /* Source Bit Mask */
};

/*
 *      The bank structure contains the parameter values for a
 *      specific program or data bank.  The bank structure
 *      is a linked list of banks.  The initial default bank
 *      is unnamed and is defined in lkdata.c, the next bank structure
 *      will be linked to this structure through the structure
 *      element 'struct bank *b_bp'.  The structure contains the
 *      bank name, the bank base address (default = 0), the bank size
 *      (default = 0, whole addressing space), the bank mapping,
 *      and the file name suffix. (default is none)  These optional
 *      parameters are from  the .bank assembler directive.
 *      The bank structure also contains the bank data output
 *      file specification, file handle pointer and the
 *      bank first output flag.
 */
struct  bank
{
        struct  bank *b_bp;     /* Bank link */
        char *  b_id;           /* Bank Name */
        char *  b_fsfx;         /* Bank File Suffix / File Specification */
        a_uint  b_base;         /* Bank base address */
        a_uint  b_size;         /* Bank size */
        a_uint  b_map;          /* Bank mapping */
        int     b_flag;         /* Bank flags */
        char *  b_fspec;        /* Bank File Specification */
        FILE *  b_ofp;          /* Bank File Handle */
        char *  b_ofspec;       /* Bank Output File Specification */
        int     b_oflag;        /* Bank has output flag */
        int     b_rtaflg;       /* Bank First Output flag */
};

#define B_BASE  0001            /* 'base' address specified */
#define B_SIZE  0002            /* 'size' of bank specified */
#define B_FSFX  0004            /* File suffix specified */
#define B_MAP   0010            /* Mapped Bank Flag */

/*
 *      A structure area is created for each 'unique' data/code
 *      area definition found as the REL files are read.  The
 *      struct area contains the name of the area, a flag byte
 *      which contains the area attributes (REL/CON/OVR/ABS),
 *      the area base address set flag byte (-b option), and the
 *      area base address and total size which will be filled
 *      in at the end of the first pass through the REL files.
 *      The area structure also contains a link to the bank
 *      this area is a part of and a data output file handle
 *      pointer which is loaded from from the bank structure.
 *      As A directives are read from the REL files a linked
 *      list of unique area structures is created by placing a
 *      link to the new area structure in the previous area structure.
 */
struct  area
{
        struct  area    *a_ap;  /* Area link */
        struct  areax   *a_axp; /* Area extension link */
        struct  bank    *a_bp;  /* Bank link */
        FILE *  a_ofp;          /* Area File Handle */
        a_uint  a_addr;         /* Beginning address of area */
        a_uint  a_size;         /* Total size of the area */
        int     a_bset;         /* Area base address set */
/* sdld specific */
        a_uint  a_unaloc;       /* Total number of unallocated bytes, for error reporting */
/* end sdld specific */
        int     a_flag;         /* Flags */
        char *  a_id;           /* Name */
/* sdld specific */
        char    *a_image;       /* Something for hc08/lkelf */
        char    *a_used;        /* Something for hc08/lkelf */
/* end sdld specific */
};

/*
 *      An areax structure is created for every A directive found
 *      while reading the REL files.  The struct areax contains a
 *      link to the 'unique' area structure referenced by the A
 *      directive and to the head structure this area segment is
 *      a part of.  The size of this area segment as read from the
 *      A directive is placed in the areax structure.  The beginning
 *      address of this segment will be filled in at the end of the
 *      first pass through the REL files.  As A directives are read
 *      from the REL files a linked list of areax structures is
 *      created for each unique area.  The final areax linked
 *      list has at its head the 'unique' area structure linked
 *      to the linked areax structures (one areax structure for
 *      each A directive for this area).
 */
struct  areax
{
        struct  areax   *a_axp; /* Area extension link */
        struct  area    *a_bap; /* Base area link */
        struct  head    *a_bhp; /* Base header link */
        a_uint  a_addr;         /* Beginning address of section */
        a_uint  a_size;         /* Size of the area in section */
};

/*
 *      A sym structure is created for every unique symbol
 *      referenced/defined while reading the REL files.  The
 *      struct sym contains the symbol's name, a flag value
 *      (not used in this linker), a symbol type denoting
 *      referenced/defined, and an address which is loaded
 *      with the relative address within the area in which
 *      the symbol was defined.  The sym structure also
 *      contains a link to the area where the symbol was defined.
 *      The sym structures are linked into linked lists using
 *      the symbol link element.
 */
struct  sym
{
        struct  sym     *s_sp;  /* Symbol link */
        struct  areax   *s_axp; /* Symbol area link */
        char    s_type;         /* Symbol subtype */
        char    s_flag;         /* Flag byte */
        a_uint  s_addr;         /* Address */
        char    *s_id;          /* Name (JLH) */
        char    *m_id;          /* Module symbol define in */
};

/*
 *      The structure lfile contains a pointer to a
 *      file specification string, an index which points
 *      to the file name (past the 'path'), the file type,
 *      an object output flag, and a link to the next
 *      lfile structure.
 */
struct  lfile
{
        struct  lfile   *f_flp; /* lfile link */
        int     f_type;         /* File type */
        char    *f_idp;         /* Pointer to file spec */
        int     f_idx;          /* Index to file name */
        int     f_obj;          /* Object output flag */
};

/*
 *      The struct base contains a pointer to a
 *      base definition string and a link to the next
 *      base structure.
 */
struct  base
{
        struct  base  *b_base;  /* Base link */
        char          *b_strp;  /* String pointer */
};

/*
 *      The struct globl contains a pointer to a
 *      global definition string and a link to the next
 *      global structure.
 */
struct  globl
{
        struct  globl *g_globl; /* Global link */
        char          *g_strp;  /* String pointer */
};

/*
 *      A structure sdp is created for each 'unique' paged
 *      area definition found as the REL files are read.
 *      As P directives are read from the REL files a linked
 *      list of unique sdp structures is created by placing a
 *      link to the new sdp structure in the previous area structure.
 */
struct  sdp
{
        struct  area  *s_area;  /* Paged Area link */
        struct  areax *s_areax; /* Paged Area Extension Link */
        a_uint  s_addr;         /* Page address offset */
};

/*
 *      The structure rerr is loaded with the information
 *      required to report an error during the linking
 *      process.  The structure contains an index value
 *      which selects the areax structure from the header
 *      areax structure list, a mode value which selects
 *      symbol or area relocation, the base address in the
 *      area section, an area/symbol list index value, and
 *      an area/symbol offset value.
 */
struct  rerr
{
        int     aindex;         /* Linking area */
        int     mode;           /* Relocation mode */
        a_uint  rtbase;         /* Base address in section */
        int     rindex;         /* Area/Symbol reloaction index */
        a_uint  rval;           /* Area/Symbol offset value */
};

/*
 *      The structure lbpath is created for each library
 *      path specification input by the -k option.  The
 *      lbpath structures are linked into a list using
 *      the next link element.
 */
struct lbpath {
        struct  lbpath  *next;
        char            *path;
};

/*
 *      The structure lbname is created for all combinations of the
 *      library path specifications (input by the -k option) and the
 *      library file specifications (input by the -l option) that
 *      lead to an existing file.  The element path points to
 *      the path string, element libfil points to the library
 *      file string, and the element libspc is the concatenation
 *      of the valid path and libfil strings.
 *
 *      The lbpath structures are linked into a list
 *      using the next link element.
 *
 *      Each library file contains a list of object files
 *      that are contained in the particular library. e.g.:
 *
 *              \iolib\termio
 *              \inilib\termio
 *
 *      Only one specification per line is allowed.
 */
struct lbname {
        struct  lbname  *next;
        char            *path;
        char            *libfil;
        char            *libspc;
        int             f_obj;
};

/*
 *      The function fndsym() searches through all combinations of the
 *      library path specifications (input by the -k option) and the
 *      library file specifications (input by the -l option) that
 *      lead to an existing file for a symbol definition.
 *
 *      The structure lbfile is created for the first library
 *      object file which contains the definition for the
 *      specified undefined symbol.
 *
 *      The element libspc points to the library file path specification
 *      and element relfil points to the object file specification string.
 *      The element filspc is the complete path/file specification for
 *      the library file to be imported into the linker.  The f_obj
 *      flag specifies if the object code from this file is
 *      to be output by the linker.  The file specification
 *      may be formed in one of two ways:
 *
 *      (1)     If the library file contained an absolute
 *              path/file specification then this becomes filspc.
 *              (i.e. C:\...)
 *
 *      (2)     If the library file contains a relative path/file
 *              specification then the concatenation of the path
 *              and this file specification becomes filspc.
 *              (i.e. \...)
 *
 *      The lbpath structures are linked into a list
 *      using the next link element.
 */
struct lbfile {
        struct  lbfile  *next;
        char            *libspc;
        char            *relfil;
        char            *filspc;
        int             f_obj;
/* sdld specific */
        long            offset;
        unsigned int    type;
/* end sdld specific */
};

/*
 *      External Definitions for all Global Variables
 */

extern  char    *_abs_;         /*      = { ".  .ABS." };
                                 */
extern  int     lkerr;          /*      ASLink error flag
                                 */
extern  char    *ip;            /*      pointer into the REL file
                                 *      text line in ib[]
                                 */
extern  char    ib[NINPUT];     /*      REL file text line
                                 */
extern  char    *rp;            /*      pointer into the LST file
                                 *      text line in rb[]
                                 */
extern  char    rb[NINPUT];     /*      LST file text line being
                                 *      address relocated
                                 */
extern  char    ctype[];        /*      array of character types, one per
                                 *      ASCII character
                                 */

/*
 *      Character Type Definitions
 */
#define SPACE   '\000'
#define ETC     '\000'
#define LETTER  '\001'
#define DIGIT   '\002'
#define BINOP   '\004'
#define RAD2    '\010'
#define RAD8    '\020'
#define RAD10   '\040'
#define RAD16   '\100'
#define ILL     '\200'

#define DGT2    DIGIT|RAD16|RAD10|RAD8|RAD2
#define DGT8    DIGIT|RAD16|RAD10|RAD8
#define DGT10   DIGIT|RAD16|RAD10
#define LTR16   LETTER|RAD16

extern  char    afspec[];       /*      The filespec created by afile()
                                 */
extern  char    ccase[];        /*      an array of characters which
                                 *      perform the case translation function
                                 */

extern  struct  lfile   *filep; /*      The pointers (lfile *) filep,
                                 *      (lfile *) cfp, and (FILE *) sfp
                                 *      are used in conjunction with
                                 *      the routine nxtline() to read
                                 *      aslink commands from
                                 *      (1) the standard input or
                                 *      (2) or a command file
                                 *      and to read the REL files
                                 *      sequentially as defined by the
                                 *      aslink input commands.
                                 *
                                 *      The pointer *filep points to the
                                 *      beginning of a linked list of
                                 *      lfile structures.
                                 */
extern  struct  lfile   *cfp;   /*      The pointer *cfp points to the
                                 *      current lfile structure
                                 */
extern  struct  lfile   *startp;/*      aslink startup file structure
                                 */
extern  struct  lfile   *linkp; /*      pointer to first lfile structure
                                 *      containing an input REL file
                                 *      specification
                                 */
extern  struct  lfile   *lfp;   /*      pointer to current lfile structure
                                 *      being processed by parse()
                                 */
extern  struct  head    *headp; /*      The pointer to the first
                                 *      head structure of a linked list
                                 */
extern  struct  head    *hp;    /*      Pointer to the current
                                 *      head structure
                                 */
extern  struct  bank    *bankp; /*      The pointer to the first
                                 *      bank structure of a linked list
                                 */
extern  struct  bank    *bp;    /*      Pointer to the current
                                 *      bank structure
                                 */
extern  struct  area    *areap; /*      The pointer to the first
                                 *      area structure of a linked list
                                 */
extern  struct  area    *ap;    /*      Pointer to the current
                                 *      area structure
                                 */
extern  struct  areax   *axp;   /*      Pointer to the current
                                 *      areax structure
                                 */
extern  struct  sym *symhash[NHASH]; /* array of pointers to NHASH
                                      * linked symbol lists
                                      */
extern  struct  base    *basep; /*      The pointer to the first
                                 *      base structure
                                 */
extern  struct  base    *bsp;   /*      Pointer to the current
                                 *      base structure
                                 */
extern  struct  globl   *globlp;/*      The pointer to the first
                                 *      globl structure
                                 */
extern  struct  globl   *gsp;   /*      Pointer to the current
                                 *      globl structure
                                 */
extern  struct  sdp     sdp;    /*      Base Paged structure
                                 */
extern  struct  rerr    rerr;   /*      Structure containing the
                                 *      linker error information
                                 */
extern  FILE    *nbofp;         /*      Non Banked Linker Output
                                 *      File Handle
                                 */
extern  FILE    *ofp;           /*      Linker Output file handle
                                 */

#if NOICE
extern  FILE    *jfp;           /*      NoICE output file handle
                                 */
#endif

extern  FILE    *mfp;           /*      Map output file handle
                                 */
extern  FILE    *rfp;           /*      File handle for output
                                 *      address relocated ASxxxx
                                 *      listing file
                                 */
extern  FILE    *sfp;           /*      The file handle sfp points to the
                                 *      currently open file
                                 */
extern  FILE    *tfp;           /*      File handle for input
                                 *      ASxxxx listing file
                                 */

#if SDCDB
extern  FILE    *yfp;           /*      SDCDB output file handle
                                 */
#endif

extern  int     oflag;          /*      Output file type flag
                                 */
extern  int     objflg;         /*      Linked file/library object output flag
                                 */

#if NOICE
extern  int     jflag;          /*      -j, enable NoICE Debug output
                                 */
#endif

extern  int     mflag;          /*      Map output flag
                                 */
extern  int     xflag;          /*      Map file radix type flag
                                 */

#if SDCDB
extern  int     yflag;          /*      -y, enable SDCC Debug output
                                 */
#endif

extern  int     pflag;          /*      print linker command file flag
                                 */
extern  int     uflag;          /*      Listing relocation flag
                                 */
extern  int     wflag;          /*      Enable wide format listing
                                 */
extern  int     zflag;          /*      Disable symbol case sensitivity
                                 */
extern  int     radix;          /*      current number conversion radix:
                                 *      2 (binary), 8 (octal), 10 (decimal),
                                 *      16 (hexadecimal)
                                 */
extern  int     line;           /*      current line number
                                 */
extern  int     page;           /*      current page number
                                 */
extern  int     lop;            /*      current line number on page
                                 */
extern  int     pass;           /*      linker pass number
                                 */
extern  a_uint  pc;             /*      current relocation address
                                 */
extern  int     pcb;            /*      current bytes per pc word
                                 */
extern  int     rtcnt;          /*      count of elements in the
                                 *      rtval[] and rtflg[] arrays
                                 */
extern  a_uint  rtval[];        /*      data associated with relocation
                                 */
extern  int     rtflg[];        /*      indicates if rtval[] value is
                                 *      to be sent to the output file.
                                 */
extern  int     rterr[];        /*      indicates if rtval[] value should
                                 *      be flagged as a relocation error.
                                 */
extern  char    rtbuf[];        /*      S19/IHX output buffer
                                 */
extern  struct  bank *rtabnk;   /*      rtbuf[] processing
                                 */
extern  int     rtaflg;         /*      rtbuf[] processing
                                 */
extern  a_uint  rtadr0;         /*
                                 */
extern  a_uint  rtadr1;         /*
                                 */
extern  a_uint  rtadr2;         /*
                                 */
extern  int     obj_flag;       /*      Linked file/library object output flag
                                 */
extern  int     a_bytes;        /*      REL file T Line address length
                                 */
extern  int     hilo;           /*      REL file byte ordering
                                 */
extern  a_uint  a_mask;         /*      Address Mask
                                 */
extern  a_uint  s_mask;         /*      Sign Mask
                                 */
extern  a_uint  v_mask;         /*      Value Mask
                                 */
extern  int     gline;          /*      LST file relocation active
                                 *      for current line
                                 */
extern  int     gcntr;          /*      LST file relocation active
                                 *      counter
                                 */
extern  struct lbpath *lbphead; /*      pointer to the first
                                 *      library path structure
                                 */
extern  struct lbname *lbnhead; /*      pointer to the first
                                 *      library name structure
                                 */
extern  struct lbfile *lbfhead; /*      pointer to the first
                                 *      library file structure
                                 */
/* sdld specific */
extern  int     sflag;          /*      JCF: Memory usage output flag
                                 */
extern  int     packflag;       /*      Pack data memory flag
                                 */
extern  int     stacksize;      /*      Pack data memory flag
                                 */
extern int      rflag;          /*      Extended linear address record flag.
                                */
extern  a_uint iram_size;       /*      internal ram size
                                 */
extern  long xram_size;         /*      external ram size
                                 */
extern  long code_size;         /*      code size
                                 */
extern  char *sdld_output;      /*      output file name, --output argument
                                 */
extern char *optsdcc;
extern char *optsdcc_module;
/* sdld 8015 specific */
extern  char idatamap[];        /* 0:not used, 1:used
                                 */
/* end sdld 8051 specific */
/* end sdld specific */



/* C Library function definitions */
/* for reference only
extern  VOID            exit();
extern  int             fclose();
extern  char *          fgets();
extern  FILE *          fopen();
extern  int             fprintf();
extern  VOID            free();
extern  VOID *          malloc();
extern  char            putc();
extern  char *          sprintf();
extern  char *          strcpy();
extern  int             strlen();
extern  char *          strncpy();
extern  char *          strrchr();
*/

/* Program function definitions */

#ifdef  OTHERSYSTEM

/* lkmain.c */
extern  FILE *          afile(char *fn, char *ft, int wf);
extern  VOID            bassav(void);
extern  int             fndidx(char *str);
extern  int             fndext(char *str);
extern  VOID            gblsav(void);
extern  int             intsiz(void);
extern  VOID            iramsav(void);
extern  VOID            xramsav(void);
extern  VOID            codesav(void);
extern  VOID            iramcheck(void);
extern  VOID            link_main(void);
extern  VOID            lkexit(int i);
extern  int             main(int argc, char *argv[]);
extern  VOID            map(void);
extern  VOID            sym(void);
extern  int             parse(void);
extern  VOID            doparse(void);
extern  VOID            setarea(void);
extern  VOID            setgbl(void);
extern  VOID            usage(int n);
extern  VOID            copyfile (FILE *dest, FILE *src);

/* lklex.c */
extern  VOID            chopcrlf(char *str);
extern  char            endline(void);
extern  int             get(void);
extern  VOID            getfid(char *str, int c);
extern  VOID            getid(char *id, int c);
extern  VOID            getSid(char *id);
extern  int             getmap(int d);
extern  int             getnb(void);
extern  int             more(void);
extern  int             nxtline(void);
extern  VOID            skip(int c);
extern  VOID            unget(int c);

/* lkarea.c */
extern  VOID            lkparea(char *id);
extern  VOID            lnkarea(void);
extern  VOID            lnkarea2(void);
extern  VOID            newarea(void);

/* lkbank.c */
extern  VOID            chkbank(FILE *fp);
extern  VOID            lkfclose(void);
extern  VOID            lkfopen(void);
extern  VOID            lkpbank(char * id);
extern  VOID            newbank(void);
extern  VOID            setbank(void);

/* lkhead.c */
extern  VOID            module(void);
extern  VOID            newhead(void);
extern  VOID            newmode(void);

/* lksym.c */
extern  int             hash(char *p, int cflag);
extern  struct  sym *   lkpsym(char *id, int f);
extern  char *          new(unsigned int n);
extern  struct  sym *   newsym(void);
extern  char *          strsto(char *str);
extern  VOID            symdef(FILE *fp);
extern  int             symeq(char *p1, char *p2, int cflag);
extern  VOID            syminit(void);
extern  VOID            symmod(FILE *fp, struct sym *tsp);
extern  a_uint          symval(struct sym *tsp);

/* lkeval.c */
extern  int             digit(int c, int r);
extern  a_uint          eval(void);
extern  a_uint          expr(int n);
extern  int             oprio(int c);
extern  a_uint          term(void);

/* lklist.c */
extern  int             dgt(int rdx, char *str, int n);
extern  VOID            newpag(FILE *fp);
extern  VOID            slew(struct area *xp, struct bank *yp);
extern  VOID            lstarea(struct area *xp, struct bank *yp);
extern  VOID            lkulist(int i);
extern  VOID            lkalist(a_uint cpc);
extern  VOID            lkglist(a_uint cpc, int v, int err);

/* lknoice.c */
extern  VOID            NoICEfopen(void);
extern  VOID            NoICEmagic(void);
extern  VOID            DefineNoICE(char *name, a_uint value, struct bank *yp);
extern  VOID            DefineGlobal(char *name, a_uint value, struct bank *yp);
extern  VOID            DefineScoped(char *name, a_uint value, struct bank *yp);
extern  VOID            DefineFile(char *name, a_uint value, struct bank *yp);
extern  VOID            DefineFunction(char *name, a_uint value, struct bank *yp);
extern  VOID            DefineStaticFunction(char *name, a_uint value, struct bank *yp);
extern  VOID            DefineEndFunction(a_uint value, struct bank *yp);
extern  VOID            DefineLine(char *lineString, a_uint value, struct bank *yp);
extern  VOID            PagedAddress(a_uint value, struct bank *yp);

/* lksdcdb.c */
extern  VOID            SDCDBfopen(void);
extern  VOID            SDCDBcopy(char * str);
extern  VOID            DefineSDCDB(char *name, a_uint value);

/* lkrloc.c */
extern  a_uint          adb_1b(a_uint v, int i);
extern  a_uint          adb_2b(a_uint v, int i);
extern  a_uint          adb_3b(a_uint v, int i);
extern  a_uint          adb_4b(a_uint v, int i);
extern  a_uint          adb_xb(a_uint v, int i);
extern  a_uint          evword(void);
extern  VOID            prntval(FILE *fptr, a_uint v);
extern  VOID            reloc(int c);

/* lkrloc3.c */
extern  a_uint          adb_bit(a_uint v, int i);
extern  a_uint          adb_24_bit(a_uint v, int i);
extern  a_uint          adb_24_hi(a_uint v, int i);
extern  a_uint          adb_24_mid(a_uint v, int i);
extern  a_uint          adb_24_lo(a_uint v, int i);
extern  a_uint          adb_hi(a_uint  v, int i);
extern  a_uint          adb_lo(a_uint  v, int i);
extern  char *          errmsg3[];
extern  VOID            errdmp3(FILE *fptr, char *str);
extern  VOID            erpdmp3(FILE *fptr, char *str);
extern  VOID            rele3(void);
extern  VOID            reloc3(int c);
extern  VOID            relt3(void);
extern  VOID            relr3(void);
extern  VOID            relp3(void);
extern  VOID            relerr3(char *str);
extern  VOID            relerp3(char *str);

/* lklibr.c */
extern  int             addfile(char *path, char *libfil);
extern  VOID            addlib(void);
extern  VOID            addpath(void);
extern  int             fndsym(char *name);
extern  VOID            library(void);
extern  VOID            loadfile(char *filspc);
extern  VOID            search(void);

/* lkout.c */
extern  VOID            lkout(int i);
extern  VOID            lkflush(void);
extern  VOID            ixx(int i);
extern  VOID            iflush(void);
extern  VOID            dbx(int i);
extern  VOID            dflush(void);

/* lks19.c */
extern  VOID            s19(int i);
extern  VOID            sflush(void);

/* EEP: lkelf.c */
extern  VOID            elf();

/* JCF: lkmem.c */
extern int summary(struct area * xp);
extern int summary2(struct area * xp);

/* JCF: lkaomf51.c */
extern void SaveLinkedFilePath(char * filepath);
extern void CreateAOMF51(void);

/* lkgb.h */
VOID gb(int in);
VOID gg(int in);

/* strcmpi.h */
extern int as_strcmpi(const char *s1, const char *s2);
extern int as_strncmpi(const char *s1, const char *s2, size_t n);

#else

#endif
