4 * (C) Copyright 1989-1995
12 * - change s_id from [NCPS] to pointer (comment)
14 * - add jflag and jfp for NoICE output
23 * The module lkdata contains the global variables
24 * and structures used in the linker aslink.
28 * Definitions for all Global Variables
31 char *_abs_ = { ". .ABS." };
33 int lkerr; /* Linker error flag
35 char *ip; /* Pointer into the REL file text line in ib[]
37 char ib[NINPUT]; /* REL file text line
39 char *rp; /* pointer into the LST file
42 char rb[NINPUT]; /* LST file text line being
45 int dflag; /* Debug information output flag
47 int oflag; /* Output file type flag
49 int mflag; /* Map output flag
51 int sflag; /* JCF: Memory usage output flag
53 int aflag; /* Overlapping area warning flag
55 int jflag; /* NoICE output flag
57 int xflag; /* Map file radix type flag
59 int pflag; /* print linker command file flag
61 int uflag; /* Listing relocation flag
63 int rflag; /* Extended linear address record flag.
65 int radix; /* current number conversion radix:
66 * 2 (binary), 8 (octal), 10 (decimal),
69 int line; /* current line number
71 int page; /* current page number
73 int lop; /* current line number on page
75 int pass; /* linker pass number
77 int rtcnt; /* count of elements in the
78 * rtval[] and rtflg[] arrays
80 Addr_T rtval[NTXT]; /* data associated with relocation
82 int rtflg[NTXT]; /* indicates if rtval[] value is
83 * to be sent to the output file.
84 * (always set in this linker)
86 int hilo; /* REL file byte ordering
88 int gline; /* LST file relocation active
91 int gcntr; /* LST file relocation active
94 Addr_T iram_size; /* internal ram size
98 * The structure lfile contains a pointer to a
99 * file specification string, the file type, and
100 * a link to the next lfile structure.
104 * struct lfile *f_flp; lfile link
105 * int f_type; File type
106 * char *f_idp; Pointer to file spec
109 struct lfile *filep; /* The pointers (lfile *) filep,
110 * (lfile *) cfp, and (FILE *) sfp
111 * are used in conjunction with
112 * the routine getline() to read
113 * asmlnk commands from
114 * (1) the standard input or
115 * (2) or a command file
116 * and to read the REL files
117 * sequentially as defined by the
118 * asmlnk input commands.
120 * The pointer *filep points to the
121 * beginning of a linked list of
124 struct lfile *cfp; /* The pointer *cfp points to the
125 * current lfile structure
127 struct lfile *startp;/* asmlnk startup file structure
129 struct lfile *linkp; /* pointer to first lfile structure
130 * containing an input REL file
133 struct lfile *lfp; /* pointer to current lfile structure
134 * being processed by parse()
136 FILE *ofp; /* Output file handle
139 FILE *mfp; /* Map output file handle
141 FILE *jfp; /* NoICE output file handle
143 FILE *rfp; /* File handle for output
144 * address relocated ASxxxx
147 FILE *sfp; /* The file handle sfp points to the
148 * currently open file
150 FILE *tfp; /* File handle for input
151 * ASxxxx listing file
153 FILE *dfp = NULL ; /*
154 * File handle for debug
155 * information output file
158 * The structures of head, area, areax, and sym are created
159 * as the REL files are read during the first pass of the
160 * linker. The struct head is created upon encountering a
161 * H directive in the REL file. The structure contains a
162 * link to a link file structure (struct lfile) which describes
163 * the file containing the H directive, the number of data/code
164 * areas contained in this header segment, the number of
165 * symbols referenced/defined in this header segment, a pointer
166 * to an array of pointers to areax structures (struct areax)
167 * created as each A directive is read, and a pointer to an
168 * array of pointers to symbol structures (struct sym) for
169 * all referenced/defined symbols. As H directives are read
170 * from the REL files a linked list of head structures is
171 * created by placing a link to the new head structure
172 * in the previous head structure.
176 * struct head *h_hp; Header link
177 * struct lfile *h_lfile; Associated file
178 * int h_narea; # of areas
179 * struct areax **a_list; Area list
180 * int h_nglob; # of global symbols
181 * struct sym **s_list; Global symbol list
182 * char m_id[NCPS]; Module name
185 struct head *headp; /* The pointer to the first
186 * head structure of a linked list
188 struct head *hp; /* Pointer to the current
193 * A structure area is created for each 'unique' data/code
194 * area definition found as the REL files are read. The
195 * struct area contains the name of the area, a flag byte
196 * which contains the area attributes (REL/CON/OVR/ABS),
197 * an area subtype (not used in this assembler), and the
198 * area base address and total size which will be filled
199 * in at the end of the first pass through the REL files.
200 * As A directives are read from the REL files a linked
201 * list of unique area structures is created by placing a
202 * link to the new area structure in the previous area structure.
206 * struct area *a_ap; Area link
207 * struct areax *a_axp; Area extension link
208 * Addr_T a_addr; Beginning address of area
209 * Addr_T a_size; Total size of the area
210 * char a_type; Area subtype
211 * char a_flag; Flag byte
212 * char a_id[NCPS]; Name
215 struct area *areap; /* The pointer to the first
216 * area structure of a linked list
218 struct area *ap; /* Pointer to the current
223 * An areax structure is created for every A directive found
224 * while reading the REL files. The struct areax contains a
225 * link to the 'unique' area structure referenced by the A
226 * directive and to the head structure this area segment is
227 * a part of. The size of this area segment as read from the
228 * A directive is placed in the areax structure. The beginning
229 * address of this segment will be filled in at the end of the
230 * first pass through the REL files. As A directives are read
231 * from the REL files a linked list of areax structures is
232 * created for each unique area. The final areax linked
233 * list has at its head the 'unique' area structure linked
234 * to the linked areax structures (one areax structure for
235 * each A directive for this area).
239 * struct areax *a_axp; Area extension link
240 * struct area *a_bap; Base area link
241 * struct head *a_bhp; Base header link
242 * Addr_T a_addr; Beginning address of section
243 * Addr_T a_size; Size of the area in section
246 struct areax *axp; /* Pointer to the current
251 * A sym structure is created for every unique symbol
252 * referenced/defined while reading the REL files. The
253 * struct sym contains the symbol's name, a flag value
254 * (not used in this linker), a symbol type denoting
255 * referenced/defined, and an address which is loaded
256 * with the relative address within the area in which
257 * the symbol was defined. The sym structure also
258 * contains a link to the area where the symbol was defined.
259 * The sym structures are linked into linked lists using
260 * the symbol link element.
264 * struct sym *s_sp; Symbol link
265 * struct areax *s_axp; Symbol area link
266 * char s_type; Symbol subtype
267 * char s_flag; Flag byte
268 * Addr_T s_addr; Address
269 * char *s_id; Name (JLH)
272 struct sym *symhash[NHASH]; /* array of pointers to NHASH
273 * linked symbol lists
276 * The struct base contains a pointer to a
277 * base definition string and a link to the next
282 * struct base *b_base; Base link
283 * char *b_strp; String pointer
286 struct base *basep; /* The pointer to the first
289 struct base *bsp; /* Pointer to the current
294 * The struct globl contains a pointer to a
295 * global definition string and a link to the next
300 * struct globl *g_globl; Global link
301 * char *g_strp; String pointer
304 struct globl *globlp;/* The pointer to the first
307 struct globl *gsp; /* Pointer to the current
312 * A structure sdp is created for each 'unique' paged
313 * area definition found as the REL files are read.
314 * As P directives are read from the REL files a linked
315 * list of unique sdp structures is created by placing a
316 * link to the new sdp structure in the previous area structure.
320 * struct area *s_area; Paged Area link
321 * struct areax *s_areax; Paged Area Extension Link
322 * Addr_T s_addr; Page address offset
325 struct sdp sdp; /* Base Page Structure */
328 * The structure rerr is loaded with the information
329 * required to report an error during the linking
330 * process. The structure contains an index value
331 * which selects the areax structure from the header
332 * areax structure list, a mode value which selects
333 * symbol or area relocation, the base address in the
334 * area section, an area/symbol list index value, and
335 * an area/symbol offset value.
339 * int aindex; Linking area
340 * int mode; Relocation mode
341 * Addr_T rtbase; Base address in section
342 * int rindex; Area/Symbol reloaction index
343 * Addr_T rval; Area/Symbol offset value
346 struct rerr rerr; /* Structure containing the
347 * linker error information
351 * The structure lbpath is created for each library
352 * path specification input by the -k option. The
353 * lbpath structures are linked into a list using
354 * the next link element.
357 * struct lbpath *next;
361 struct lbpath *lbphead; /* pointer to the first
362 * library path structure
366 * The structure lbname is created for all combinations of the
367 * library path specifications (input by the -k option) and the
368 * library file specifications (input by the -l option) that
369 * lead to an existing file. The element path points to
370 * the path string, element libfil points to the library
371 * file string, and the element libspc is the concatenation
372 * of the valid path and libfil strings.
374 * The lbpath structures are linked into a list
375 * using the next link element.
377 * Each library file contains a list of object files
378 * that are contained in the particular library. e.g.:
383 * Only one specification per line is allowed.
386 * struct lbname *next;
392 struct lbname *lbnhead; /* pointer to the first
393 * library name structure
397 * The function fndsym() searches through all combinations of the
398 * library path specifications (input by the -k option) and the
399 * library file specifications (input by the -l option) that
400 * lead to an existing file for a symbol definition.
402 * The structure lbfile is created for the first library
403 * object file which contains the definition for the
404 * specified undefined symbol.
406 * The element libspc points to the library file path specification
407 * and element relfil points to the object file specification string.
408 * The element filspc is the complete path/file specification for
409 * the library file to be imported into the linker. The
410 * file specicifation may be formed in one of two ways:
412 * (1) If the library file contained an absolute
413 * path/file specification then this becomes filspc.
416 * (2) If the library file contains a relative path/file
417 * specification then the concatenation of the path
418 * and this file specification becomes filspc.
421 * The lbpath structures are linked into a list
422 * using the next link element.
425 * struct lbfile *next;
431 struct lbfile *lbfhead; /* pointer to the first
432 * library file structure
436 * array of character types, one per
439 unsigned char ctype[128] = {
440 /*NUL*/ ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,
441 /*BS*/ ILL, SPACE, ILL, ILL, SPACE, ILL, ILL, ILL,
442 /*DLE*/ ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,
443 /*CAN*/ ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,
444 /*SPC*/ SPACE, ETC, ETC, ETC, LETTER, BINOP, BINOP, ETC,
445 /*(*/ ETC, ETC, BINOP, BINOP, ETC, BINOP, LETTER, BINOP,
446 /*0*/ DGT2, DGT2, DGT8, DGT8, DGT8, DGT8, DGT8, DGT8,
447 /*8*/ DGT10, DGT10, ETC, ETC, BINOP, ETC, BINOP, ETC,
448 /*@*/ ETC, LTR16, LTR16, LTR16, LTR16, LTR16, LTR16, LETTER,
449 /*H*/ LETTER, LETTER, LETTER, LETTER, LETTER, LETTER, LETTER, LETTER,
450 /*P*/ LETTER, LETTER, LETTER, LETTER, LETTER, LETTER, LETTER, LETTER,
451 /*X*/ LETTER, LETTER, LETTER, ETC, ETC, ETC, BINOP, LETTER,
452 /*`*/ ETC, LTR16, LTR16, LTR16, LTR16, LTR16, LTR16, LETTER,
453 /*h*/ LETTER, LETTER, LETTER, LETTER, LETTER, LETTER, LETTER, LETTER,
454 /*p*/ LETTER, LETTER, LETTER, LETTER, LETTER, LETTER, LETTER, LETTER,
455 /*x*/ LETTER, LETTER, LETTER, ETC, BINOP, ETC, ETC, ETC
459 * an array of characters which
460 * perform the case translation function
465 /*NUL*/ '\000', '\001', '\002', '\003', '\004', '\005', '\006', '\007',
466 /*BS*/ '\010', '\011', '\012', '\013', '\014', '\015', '\016', '\017',
467 /*DLE*/ '\020', '\021', '\022', '\023', '\024', '\025', '\026', '\027',
468 /*CAN*/ '\030', '\031', '\032', '\033', '\034', '\035', '\036', '\037',
469 /*SPC*/ '\040', '\041', '\042', '\043', '\044', '\045', '\046', '\047',
470 /*(*/ '\050', '\051', '\052', '\053', '\054', '\055', '\056', '\057',
471 /*0*/ '\060', '\061', '\062', '\063', '\064', '\065', '\066', '\067',
472 /*8*/ '\070', '\071', '\072', '\073', '\074', '\075', '\076', '\077',
473 /*@*/ '\100', '\141', '\142', '\143', '\144', '\145', '\146', '\147',
474 /*H*/ '\150', '\151', '\152', '\153', '\154', '\155', '\156', '\157',
475 /*P*/ '\160', '\161', '\162', '\163', '\164', '\165', '\166', '\167',
476 /*X*/ '\170', '\171', '\172', '\133', '\134', '\135', '\136', '\137',
477 /*`*/ '\140', '\141', '\142', '\143', '\144', '\145', '\146', '\147',
478 /*h*/ '\150', '\151', '\152', '\153', '\154', '\155', '\156', '\157',
479 /*p*/ '\160', '\161', '\162', '\163', '\164', '\165', '\166', '\167',
480 /*x*/ '\170', '\171', '\172', '\173', '\174', '\175', '\176', '\177'