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
46 char sdccopt[NINPUT]="";
47 char sdccopt_module[NINPUT]="";
48 char curr_module[NINPUT]="";
50 int dflag; /* Debug information output flag
52 int oflag; /* Output file type flag
54 int mflag; /* Map output flag
56 int sflag; /* JCF: Memory usage output flag
58 int packflag_and_stacksize=0; /* JCF: Pack internal memory flag
60 int aflag; /* Overlapping area warning flag
62 int jflag; /* NoICE output flag
64 int xflag; /* Map file radix type flag
66 int pflag; /* print linker command file flag
68 int uflag; /* Listing relocation flag
70 int rflag; /* Extended linear address record flag.
72 int radix; /* current number conversion radix:
73 * 2 (binary), 8 (octal), 10 (decimal),
76 int line; /* current line number
78 int page; /* current page number
80 int lop; /* current line number on page
82 int pass; /* linker pass number
84 int rtcnt; /* count of elements in the
85 * rtval[] and rtflg[] arrays
87 Addr_T rtval[NTXT]; /* data associated with relocation
89 int rtflg[NTXT]; /* indicates if rtval[] value is
90 * to be sent to the output file.
91 * (always set in this linker)
93 int hilo; /* REL file byte ordering
95 int gline; /* LST file relocation active
98 int gcntr; /* LST file relocation active
101 Addr_T iram_size; /* internal ram size
103 long xram_size=-1; /* external ram size
105 long code_size=-1; /* code size
109 * The structure lfile contains a pointer to a
110 * file specification string, the file type, and
111 * a link to the next lfile structure.
115 * struct lfile *f_flp; lfile link
116 * int f_type; File type
117 * char *f_idp; Pointer to file spec
120 struct lfile *filep; /* The pointers (lfile *) filep,
121 * (lfile *) cfp, and (FILE *) sfp
122 * are used in conjunction with
123 * the routine getline() to read
124 * asmlnk commands from
125 * (1) the standard input or
126 * (2) or a command file
127 * and to read the REL files
128 * sequentially as defined by the
129 * asmlnk input commands.
131 * The pointer *filep points to the
132 * beginning of a linked list of
135 struct lfile *cfp; /* The pointer *cfp points to the
136 * current lfile structure
138 struct lfile *startp;/* asmlnk startup file structure
140 struct lfile *linkp; /* pointer to first lfile structure
141 * containing an input REL file
144 struct lfile *lfp; /* pointer to current lfile structure
145 * being processed by parse()
147 FILE *ofp; /* Output file handle
150 FILE *mfp; /* Map output file handle
152 FILE *jfp; /* NoICE output file handle
154 FILE *rfp; /* File handle for output
155 * address relocated ASxxxx
158 FILE *sfp; /* The file handle sfp points to the
159 * currently open file
161 FILE *tfp; /* File handle for input
162 * ASxxxx listing file
164 FILE *dfp = NULL ; /*
165 * File handle for debug
166 * information output file
169 * The structures of head, area, areax, and sym are created
170 * as the REL files are read during the first pass of the
171 * linker. The struct head is created upon encountering a
172 * H directive in the REL file. The structure contains a
173 * link to a link file structure (struct lfile) which describes
174 * the file containing the H directive, the number of data/code
175 * areas contained in this header segment, the number of
176 * symbols referenced/defined in this header segment, a pointer
177 * to an array of pointers to areax structures (struct areax)
178 * created as each A directive is read, and a pointer to an
179 * array of pointers to symbol structures (struct sym) for
180 * all referenced/defined symbols. As H directives are read
181 * from the REL files a linked list of head structures is
182 * created by placing a link to the new head structure
183 * in the previous head structure.
187 * struct head *h_hp; Header link
188 * struct lfile *h_lfile; Associated file
189 * int h_narea; # of areas
190 * struct areax **a_list; Area list
191 * int h_nglob; # of global symbols
192 * struct sym **s_list; Global symbol list
193 * char m_id[NCPS]; Module name
196 struct head *headp; /* The pointer to the first
197 * head structure of a linked list
199 struct head *hp; /* Pointer to the current
204 * A structure area is created for each 'unique' data/code
205 * area definition found as the REL files are read. The
206 * struct area contains the name of the area, a flag byte
207 * which contains the area attributes (REL/CON/OVR/ABS),
208 * an area subtype (not used in this assembler), and the
209 * area base address and total size which will be filled
210 * in at the end of the first pass through the REL files.
211 * As A directives are read from the REL files a linked
212 * list of unique area structures is created by placing a
213 * link to the new area structure in the previous area structure.
217 * struct area *a_ap; Area link
218 * struct areax *a_axp; Area extension link
219 * Addr_T a_addr; Beginning address of area
220 * Addr_T a_size; Total size of the area
221 * char a_type; Area subtype
222 * char a_flag; Flag byte
223 * char a_id[NCPS]; Name
226 struct area *areap; /* The pointer to the first
227 * area structure of a linked list
229 struct area *ap; /* Pointer to the current
234 * An areax structure is created for every A directive found
235 * while reading the REL files. The struct areax contains a
236 * link to the 'unique' area structure referenced by the A
237 * directive and to the head structure this area segment is
238 * a part of. The size of this area segment as read from the
239 * A directive is placed in the areax structure. The beginning
240 * address of this segment will be filled in at the end of the
241 * first pass through the REL files. As A directives are read
242 * from the REL files a linked list of areax structures is
243 * created for each unique area. The final areax linked
244 * list has at its head the 'unique' area structure linked
245 * to the linked areax structures (one areax structure for
246 * each A directive for this area).
250 * struct areax *a_axp; Area extension link
251 * struct area *a_bap; Base area link
252 * struct head *a_bhp; Base header link
253 * Addr_T a_addr; Beginning address of section
254 * Addr_T a_size; Size of the area in section
257 struct areax *axp; /* Pointer to the current
262 * A sym structure is created for every unique symbol
263 * referenced/defined while reading the REL files. The
264 * struct sym contains the symbol's name, a flag value
265 * (not used in this linker), a symbol type denoting
266 * referenced/defined, and an address which is loaded
267 * with the relative address within the area in which
268 * the symbol was defined. The sym structure also
269 * contains a link to the area where the symbol was defined.
270 * The sym structures are linked into linked lists using
271 * the symbol link element.
275 * struct sym *s_sp; Symbol link
276 * struct areax *s_axp; Symbol area link
277 * char s_type; Symbol subtype
278 * char s_flag; Flag byte
279 * Addr_T s_addr; Address
280 * char *s_id; Name (JLH)
283 struct sym *symhash[NHASH]; /* array of pointers to NHASH
284 * linked symbol lists
287 * The struct base contains a pointer to a
288 * base definition string and a link to the next
293 * struct base *b_base; Base link
294 * char *b_strp; String pointer
297 struct base *basep; /* The pointer to the first
300 struct base *bsp; /* Pointer to the current
305 * The struct globl contains a pointer to a
306 * global definition string and a link to the next
311 * struct globl *g_globl; Global link
312 * char *g_strp; String pointer
315 struct globl *globlp;/* The pointer to the first
318 struct globl *gsp; /* Pointer to the current
323 * A structure sdp is created for each 'unique' paged
324 * area definition found as the REL files are read.
325 * As P directives are read from the REL files a linked
326 * list of unique sdp structures is created by placing a
327 * link to the new sdp structure in the previous area structure.
331 * struct area *s_area; Paged Area link
332 * struct areax *s_areax; Paged Area Extension Link
333 * Addr_T s_addr; Page address offset
336 struct sdp sdp; /* Base Page Structure */
339 * The structure rerr is loaded with the information
340 * required to report an error during the linking
341 * process. The structure contains an index value
342 * which selects the areax structure from the header
343 * areax structure list, a mode value which selects
344 * symbol or area relocation, the base address in the
345 * area section, an area/symbol list index value, and
346 * an area/symbol offset value.
350 * int aindex; Linking area
351 * int mode; Relocation mode
352 * Addr_T rtbase; Base address in section
353 * int rindex; Area/Symbol reloaction index
354 * Addr_T rval; Area/Symbol offset value
357 struct rerr rerr; /* Structure containing the
358 * linker error information
362 * The structure lbpath is created for each library
363 * path specification input by the -k option. The
364 * lbpath structures are linked into a list using
365 * the next link element.
368 * struct lbpath *next;
372 struct lbpath *lbphead; /* pointer to the first
373 * library path structure
377 * The structure lbname is created for all combinations of the
378 * library path specifications (input by the -k option) and the
379 * library file specifications (input by the -l option) that
380 * lead to an existing file. The element path points to
381 * the path string, element libfil points to the library
382 * file string, and the element libspc is the concatenation
383 * of the valid path and libfil strings.
385 * The lbpath structures are linked into a list
386 * using the next link element.
388 * Each library file contains a list of object files
389 * that are contained in the particular library. e.g.:
394 * Only one specification per line is allowed.
397 * struct lbname *next;
403 struct lbname *lbnhead; /* pointer to the first
404 * library name structure
408 * The function fndsym() searches through all combinations of the
409 * library path specifications (input by the -k option) and the
410 * library file specifications (input by the -l option) that
411 * lead to an existing file for a symbol definition.
413 * The structure lbfile is created for the first library
414 * object file which contains the definition for the
415 * specified undefined symbol.
417 * The element libspc points to the library file path specification
418 * and element relfil points to the object file specification string.
419 * The element filspc is the complete path/file specification for
420 * the library file to be imported into the linker. The
421 * file specicifation may be formed in one of two ways:
423 * (1) If the library file contained an absolute
424 * path/file specification then this becomes filspc.
427 * (2) If the library file contains a relative path/file
428 * specification then the concatenation of the path
429 * and this file specification becomes filspc.
432 * The lbpath structures are linked into a list
433 * using the next link element.
436 * struct lbfile *next;
442 struct lbfile *lbfhead; /* pointer to the first
443 * library file structure
447 * array of character types, one per
450 unsigned char ctype[128] = {
451 /*NUL*/ ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,
452 /*BS*/ ILL, SPACE, ILL, ILL, SPACE, ILL, ILL, ILL,
453 /*DLE*/ ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,
454 /*CAN*/ ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,
455 /*SPC*/ SPACE, ETC, ETC, ETC, LETTER, BINOP, BINOP, ETC,
456 /*(*/ ETC, ETC, BINOP, BINOP, ETC, BINOP, LETTER, BINOP,
457 /*0*/ DGT2, DGT2, DGT8, DGT8, DGT8, DGT8, DGT8, DGT8,
458 /*8*/ DGT10, DGT10, ETC, ETC, BINOP, ETC, BINOP, ETC,
459 /*@*/ ETC, LTR16, LTR16, LTR16, LTR16, LTR16, LTR16, LETTER,
460 /*H*/ LETTER, LETTER, LETTER, LETTER, LETTER, LETTER, LETTER, LETTER,
461 /*P*/ LETTER, LETTER, LETTER, LETTER, LETTER, LETTER, LETTER, LETTER,
462 /*X*/ LETTER, LETTER, LETTER, ETC, ETC, ETC, BINOP, LETTER,
463 /*`*/ ETC, LTR16, LTR16, LTR16, LTR16, LTR16, LTR16, LETTER,
464 /*h*/ LETTER, LETTER, LETTER, LETTER, LETTER, LETTER, LETTER, LETTER,
465 /*p*/ LETTER, LETTER, LETTER, LETTER, LETTER, LETTER, LETTER, LETTER,
466 /*x*/ LETTER, LETTER, LETTER, ETC, BINOP, ETC, ETC, ETC
470 * an array of characters which
471 * perform the case translation function
476 /*NUL*/ '\000', '\001', '\002', '\003', '\004', '\005', '\006', '\007',
477 /*BS*/ '\010', '\011', '\012', '\013', '\014', '\015', '\016', '\017',
478 /*DLE*/ '\020', '\021', '\022', '\023', '\024', '\025', '\026', '\027',
479 /*CAN*/ '\030', '\031', '\032', '\033', '\034', '\035', '\036', '\037',
480 /*SPC*/ '\040', '\041', '\042', '\043', '\044', '\045', '\046', '\047',
481 /*(*/ '\050', '\051', '\052', '\053', '\054', '\055', '\056', '\057',
482 /*0*/ '\060', '\061', '\062', '\063', '\064', '\065', '\066', '\067',
483 /*8*/ '\070', '\071', '\072', '\073', '\074', '\075', '\076', '\077',
484 /*@*/ '\100', '\141', '\142', '\143', '\144', '\145', '\146', '\147',
485 /*H*/ '\150', '\151', '\152', '\153', '\154', '\155', '\156', '\157',
486 /*P*/ '\160', '\161', '\162', '\163', '\164', '\165', '\166', '\167',
487 /*X*/ '\170', '\171', '\172', '\133', '\134', '\135', '\136', '\137',
488 /*`*/ '\140', '\141', '\142', '\143', '\144', '\145', '\146', '\147',
489 /*h*/ '\150', '\151', '\152', '\153', '\154', '\155', '\156', '\157',
490 /*p*/ '\160', '\161', '\162', '\163', '\164', '\165', '\166', '\167',
491 /*x*/ '\170', '\171', '\172', '\173', '\174', '\175', '\176', '\177'