/* lkdata.c */ /* * (C) Copyright 1989-1995 * All Rights Reserved * * Alan R. Baldwin * 721 Berkeley St. * Kent, Ohio 44240 */ #include #include //#include #include "aslink.h" /*)Module lkdata.c * * The module lkdata contains the global variables * and structures used in the linker aslink. */ /* * Definitions for all Global Variables */ char *_abs_ = { ". .ABS." }; int lkerr; /* Linker error flag */ char *ip; /* Pointer into the REL file text line in ib[] */ char ib[NINPUT]; /* REL file text line */ char *rp; /* pointer into the LST file * text line in rb[] */ char rb[NINPUT]; /* LST file text line being * address relocated */ int oflag; /* Output file type flag */ int mflag; /* Map output flag */ #ifdef SDK int symflag; /* no$gmb .sym output flag */ #endif int xflag; /* Map file radix type flag */ int pflag; /* print linker command file flag */ int uflag; /* Listing relocation flag */ int radix; /* current number conversion radix: * 2 (binary), 8 (octal), 10 (decimal), * 16 (hexadecimal) */ int line; /* current line number */ int page; /* current page number */ int lop; /* current line number on page */ int pass; /* linker pass number */ int rtcnt; /* count of elements in the * rtval[] and rtflg[] arrays */ addr_t rtval[NTXT]; /* data associated with relocation */ int rtflg[NTXT]; /* indicates if rtval[] value is * to be sent to the output file. * (always set in this linker) */ int hilo; /* REL file byte ordering */ int gline; /* LST file relocation active * for current line */ int gcntr; /* LST file relocation active * counter */ /* * The structure lfile contains a pointer to a * file specification string, the file type, 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 * }; */ struct lfile *filep; /* The pointers (lfile *) filep, * (lfile *) cfp, and (FILE *) sfp * are used in conjunction with * the routine getline() to read * asmlnk commands from * (1) the standard input or * (2) or a command file * and to read the REL files * sequentially as defined by the * asmlnk input commands. * * The pointer *filep points to the * beginning of a linked list of * lfile structures. */ struct lfile *cfp; /* The pointer *cfp points to the * current lfile structure */ struct lfile *startp;/* asmlnk startup file structure */ struct lfile *linkp; /* pointer to first lfile structure * containing an input REL file * specification */ struct lfile *lfp; /* pointer to current lfile structure * being processed by parse() */ FILE *ofp; /* Output file handle * for word formats */ FILE *mfp; /* Map output file handle */ FILE *rfp; /* File handle for output * address relocated ASxxxx * listing file */ FILE *sfp; /* The file handle sfp points to the * currently open file */ FILE *tfp; /* File handle for input * ASxxxx listing file */ /* * The structures of head, 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, 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, and a pointer to an * array of pointers to symbol structures (struct sym) for * all referenced/defined symbols. 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_nglob; # of global symbols * struct sym **s_list; Global symbol list * char m_id[NCPS]; Module name * }; */ struct head *headp; /* The pointer to the first * head structure of a linked list */ struct head *hp; /* Pointer to the current * head structure */ /* * 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), * an area subtype (not used in this assembler), and the * area base address and total size which 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 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 * addr_t a_addr; Beginning address of area * addr_t a_size; Total size of the area * char a_type; Area subtype * char a_flag; Flag byte * char a_id[NCPS]; Name * }; */ struct area *areap; /* The pointer to the first * area structure of a linked list */ struct area *ap; /* Pointer to the current * area structure */ /* * 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 * addr_t a_addr; Beginning address of section * addr_t a_size; Size of the area in section * }; */ struct areax *axp; /* Pointer to the current * areax structure */ /* * 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 * addr_t s_addr; Address * char s_id[NCPS]; Name * }; */ struct sym *symhash[NHASH]; /* array of pointers to NHASH * linked symbol lists */ /* * 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 * }; */ struct base *basep; /* The pointer to the first * base structure */ struct base *bsp; /* Pointer to the current * base structure */ /* * 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 * }; */ struct globl *globlp;/* The pointer to the first * globl structure */ struct globl *gsp; /* Pointer to the current * globl structure */ /* * 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 * addr_t s_addr; Page address offset * }; */ struct sdp sdp; /* Base Page Structure */ /* * 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 * addr_t rtbase; Base address in section * int rindex; Area/Symbol reloaction index * addr_t rval; Area/Symbol offset value * }; */ struct rerr rerr; /* Structure containing the * linker error information */ /* * 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; * }; */ struct lbpath *lbphead; /* pointer to the first * library path structure */ /* * 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; * }; */ struct lbname *lbnhead; /* pointer to the first * library name structure */ /* * 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 * file specicifation 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; * }; */ struct lbfile *lbfhead; /* pointer to the first * library file structure */ /* * 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, ETC, 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 */ #if CASE_SENSITIVE #else 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' }; #endif