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 aflag; /* Overlapping area warning flag
60 int jflag; /* NoICE output flag
62 int xflag; /* Map file radix type flag
64 int pflag; /* print linker command file flag
66 int uflag; /* Listing relocation flag
68 int rflag; /* Extended linear address record flag.
70 int radix; /* current number conversion radix:
71 * 2 (binary), 8 (octal), 10 (decimal),
74 int line; /* current line number
76 int page; /* current page number
78 int lop; /* current line number on page
80 int pass; /* linker pass number
82 int rtcnt; /* count of elements in the
83 * rtval[] and rtflg[] arrays
85 Addr_T rtval[NTXT]; /* data associated with relocation
87 int rtflg[NTXT]; /* indicates if rtval[] value is
88 * to be sent to the output file.
89 * (always set in this linker)
91 int hilo; /* REL file byte ordering
93 int gline; /* LST file relocation active
96 int gcntr; /* LST file relocation active
99 Addr_T iram_size; /* internal ram size
101 long xram_size=-1; /* external ram size
103 long code_size=-1; /* code size
107 * The structure lfile contains a pointer to a
108 * file specification string, the file type, and
109 * a link to the next lfile structure.
113 * struct lfile *f_flp; lfile link
114 * int f_type; File type
115 * char *f_idp; Pointer to file spec
118 struct lfile *filep; /* The pointers (lfile *) filep,
119 * (lfile *) cfp, and (FILE *) sfp
120 * are used in conjunction with
121 * the routine lk_getline() to read
122 * asmlnk commands from
123 * (1) the standard input or
124 * (2) or a command file
125 * and to read the REL files
126 * sequentially as defined by the
127 * asmlnk input commands.
129 * The pointer *filep points to the
130 * beginning of a linked list of
133 struct lfile *cfp; /* The pointer *cfp points to the
134 * current lfile structure
136 struct lfile *startp;/* asmlnk startup file structure
138 struct lfile *linkp; /* pointer to first lfile structure
139 * containing an input REL file
142 struct lfile *lfp; /* pointer to current lfile structure
143 * being processed by parse()
145 FILE *ofp; /* Output file handle
148 FILE *mfp; /* Map output file handle
150 FILE *jfp; /* NoICE output file handle
152 FILE *rfp; /* File handle for output
153 * address relocated ASxxxx
156 FILE *sfp; /* The file handle sfp points to the
157 * currently open file
159 FILE *tfp; /* File handle for input
160 * ASxxxx listing file
162 FILE *dfp = NULL ; /*
163 * File handle for debug
164 * information output file
167 * The structures of head, area, areax, and sym are created
168 * as the REL files are read during the first pass of the
169 * linker. The struct head is created upon encountering a
170 * H directive in the REL file. The structure contains a
171 * link to a link file structure (struct lfile) which describes
172 * the file containing the H directive, the number of data/code
173 * areas contained in this header segment, the number of
174 * symbols referenced/defined in this header segment, a pointer
175 * to an array of pointers to areax structures (struct areax)
176 * created as each A directive is read, and a pointer to an
177 * array of pointers to symbol structures (struct sym) for
178 * all referenced/defined symbols. As H directives are read
179 * from the REL files a linked list of head structures is
180 * created by placing a link to the new head structure
181 * in the previous head structure.
185 * struct head *h_hp; Header link
186 * struct lfile *h_lfile; Associated file
187 * int h_narea; # of areas
188 * struct areax **a_list; Area list
189 * int h_nglob; # of global symbols
190 * struct sym **s_list; Global symbol list
191 * char m_id[NCPS]; Module name
194 struct head *headp; /* The pointer to the first
195 * head structure of a linked list
197 struct head *hp; /* Pointer to the current
202 * A structure area is created for each 'unique' data/code
203 * area definition found as the REL files are read. The
204 * struct area contains the name of the area, a flag byte
205 * which contains the area attributes (REL/CON/OVR/ABS),
206 * an area subtype (not used in this assembler), and the
207 * area base address and total size which will be filled
208 * in at the end of the first pass through the REL files.
209 * As A directives are read from the REL files a linked
210 * list of unique area structures is created by placing a
211 * link to the new area structure in the previous area structure.
215 * struct area *a_ap; Area link
216 * struct areax *a_axp; Area extension link
217 * Addr_T a_addr; Beginning address of area
218 * Addr_T a_size; Total size of the area
219 * char a_type; Area subtype
220 * char a_flag; Flag byte
221 * char a_id[NCPS]; Name
224 struct area *areap; /* The pointer to the first
225 * area structure of a linked list
227 struct area *ap; /* Pointer to the current
232 * An areax structure is created for every A directive found
233 * while reading the REL files. The struct areax contains a
234 * link to the 'unique' area structure referenced by the A
235 * directive and to the head structure this area segment is
236 * a part of. The size of this area segment as read from the
237 * A directive is placed in the areax structure. The beginning
238 * address of this segment will be filled in at the end of the
239 * first pass through the REL files. As A directives are read
240 * from the REL files a linked list of areax structures is
241 * created for each unique area. The final areax linked
242 * list has at its head the 'unique' area structure linked
243 * to the linked areax structures (one areax structure for
244 * each A directive for this area).
248 * struct areax *a_axp; Area extension link
249 * struct area *a_bap; Base area link
250 * struct head *a_bhp; Base header link
251 * Addr_T a_addr; Beginning address of section
252 * Addr_T a_size; Size of the area in section
255 struct areax *axp; /* Pointer to the current
260 * A sym structure is created for every unique symbol
261 * referenced/defined while reading the REL files. The
262 * struct sym contains the symbol's name, a flag value
263 * (not used in this linker), a symbol type denoting
264 * referenced/defined, and an address which is loaded
265 * with the relative address within the area in which
266 * the symbol was defined. The sym structure also
267 * contains a link to the area where the symbol was defined.
268 * The sym structures are linked into linked lists using
269 * the symbol link element.
273 * struct sym *s_sp; Symbol link
274 * struct areax *s_axp; Symbol area link
275 * char s_type; Symbol subtype
276 * char s_flag; Flag byte
277 * Addr_T s_addr; Address
278 * char *s_id; Name (JLH)
281 struct sym *symhash[NHASH]; /* array of pointers to NHASH
282 * linked symbol lists
285 * The struct base contains a pointer to a
286 * base definition string and a link to the next
291 * struct base *b_base; Base link
292 * char *b_strp; String pointer
295 struct base *basep; /* The pointer to the first
298 struct base *bsp; /* Pointer to the current
303 * The struct globl contains a pointer to a
304 * global definition string and a link to the next
309 * struct globl *g_globl; Global link
310 * char *g_strp; String pointer
313 struct globl *globlp;/* The pointer to the first
316 struct globl *gsp; /* Pointer to the current
321 * A structure sdp is created for each 'unique' paged
322 * area definition found as the REL files are read.
323 * As P directives are read from the REL files a linked
324 * list of unique sdp structures is created by placing a
325 * link to the new sdp structure in the previous area structure.
329 * struct area *s_area; Paged Area link
330 * struct areax *s_areax; Paged Area Extension Link
331 * Addr_T s_addr; Page address offset
334 struct sdp sdp; /* Base Page Structure */
337 * The structure rerr is loaded with the information
338 * required to report an error during the linking
339 * process. The structure contains an index value
340 * which selects the areax structure from the header
341 * areax structure list, a mode value which selects
342 * symbol or area relocation, the base address in the
343 * area section, an area/symbol list index value, and
344 * an area/symbol offset value.
348 * int aindex; Linking area
349 * int mode; Relocation mode
350 * Addr_T rtbase; Base address in section
351 * int rindex; Area/Symbol reloaction index
352 * Addr_T rval; Area/Symbol offset value
355 struct rerr rerr; /* Structure containing the
356 * linker error information
360 * The structure lbpath is created for each library
361 * path specification input by the -k option. The
362 * lbpath structures are linked into a list using
363 * the next link element.
366 * struct lbpath *next;
370 struct lbpath *lbphead; /* pointer to the first
371 * library path structure
375 * The structure lbname is created for all combinations of the
376 * library path specifications (input by the -k option) and the
377 * library file specifications (input by the -l option) that
378 * lead to an existing file. The element path points to
379 * the path string, element libfil points to the library
380 * file string, and the element libspc is the concatenation
381 * of the valid path and libfil strings.
383 * The lbpath structures are linked into a list
384 * using the next link element.
386 * Each library file contains a list of object files
387 * that are contained in the particular library. e.g.:
392 * Only one specification per line is allowed.
395 * struct lbname *next;
401 struct lbname *lbnhead; /* pointer to the first
402 * library name structure
406 * The function fndsym() searches through all combinations of the
407 * library path specifications (input by the -k option) and the
408 * library file specifications (input by the -l option) that
409 * lead to an existing file for a symbol definition.
411 * The structure lbfile is created for the first library
412 * object file which contains the definition for the
413 * specified undefined symbol.
415 * The element libspc points to the library file path specification
416 * and element relfil points to the object file specification string.
417 * The element filspc is the complete path/file specification for
418 * the library file to be imported into the linker. The
419 * file specicifation may be formed in one of two ways:
421 * (1) If the library file contained an absolute
422 * path/file specification then this becomes filspc.
425 * (2) If the library file contains a relative path/file
426 * specification then the concatenation of the path
427 * and this file specification becomes filspc.
430 * The lbpath structures are linked into a list
431 * using the next link element.
434 * struct lbfile *next;
440 struct lbfile *lbfhead; /* pointer to the first
441 * library file structure
445 * array of character types, one per
448 unsigned char ctype[128] = {
449 /*NUL*/ ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,
450 /*BS*/ ILL, SPACE, ILL, ILL, SPACE, ILL, ILL, ILL,
451 /*DLE*/ ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,
452 /*CAN*/ ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,
453 /*SPC*/ SPACE, ETC, ETC, ETC, LETTER, BINOP, BINOP, ETC,
454 /*(*/ ETC, ETC, BINOP, BINOP, ETC, BINOP, LETTER, BINOP,
455 /*0*/ DGT2, DGT2, DGT8, DGT8, DGT8, DGT8, DGT8, DGT8,
456 /*8*/ DGT10, DGT10, ETC, ETC, BINOP, ETC, BINOP, ETC,
457 /*@*/ ETC, LTR16, LTR16, LTR16, LTR16, LTR16, LTR16, LETTER,
458 /*H*/ LETTER, LETTER, LETTER, LETTER, LETTER, LETTER, LETTER, LETTER,
459 /*P*/ LETTER, LETTER, LETTER, LETTER, LETTER, LETTER, LETTER, LETTER,
460 /*X*/ LETTER, LETTER, LETTER, ETC, ETC, ETC, BINOP, LETTER,
461 /*`*/ ETC, LTR16, LTR16, LTR16, LTR16, LTR16, LTR16, LETTER,
462 /*h*/ LETTER, LETTER, LETTER, LETTER, LETTER, LETTER, LETTER, LETTER,
463 /*p*/ LETTER, LETTER, LETTER, LETTER, LETTER, LETTER, LETTER, LETTER,
464 /*x*/ LETTER, LETTER, LETTER, ETC, BINOP, ETC, ETC, ETC
468 * an array of characters which
469 * perform the case translation function
474 /*NUL*/ '\000', '\001', '\002', '\003', '\004', '\005', '\006', '\007',
475 /*BS*/ '\010', '\011', '\012', '\013', '\014', '\015', '\016', '\017',
476 /*DLE*/ '\020', '\021', '\022', '\023', '\024', '\025', '\026', '\027',
477 /*CAN*/ '\030', '\031', '\032', '\033', '\034', '\035', '\036', '\037',
478 /*SPC*/ '\040', '\041', '\042', '\043', '\044', '\045', '\046', '\047',
479 /*(*/ '\050', '\051', '\052', '\053', '\054', '\055', '\056', '\057',
480 /*0*/ '\060', '\061', '\062', '\063', '\064', '\065', '\066', '\067',
481 /*8*/ '\070', '\071', '\072', '\073', '\074', '\075', '\076', '\077',
482 /*@*/ '\100', '\141', '\142', '\143', '\144', '\145', '\146', '\147',
483 /*H*/ '\150', '\151', '\152', '\153', '\154', '\155', '\156', '\157',
484 /*P*/ '\160', '\161', '\162', '\163', '\164', '\165', '\166', '\167',
485 /*X*/ '\170', '\171', '\172', '\133', '\134', '\135', '\136', '\137',
486 /*`*/ '\140', '\141', '\142', '\143', '\144', '\145', '\146', '\147',
487 /*h*/ '\150', '\151', '\152', '\153', '\154', '\155', '\156', '\157',
488 /*p*/ '\160', '\161', '\162', '\163', '\164', '\165', '\166', '\167',
489 /*x*/ '\170', '\171', '\172', '\173', '\174', '\175', '\176', '\177'