4 * (C) Copyright 1989-1995
19 * The module lkdata contains the global variables
20 * and structures used in the linker aslink.
24 * Definitions for all Global Variables
27 char *_abs_ = { ". .ABS." };
29 int lkerr; /* Linker error flag
31 char *ip; /* Pointer into the REL file text line in ib[]
33 char ib[NINPUT]; /* REL file text line
35 char *rp; /* pointer into the LST file
38 char rb[NINPUT]; /* LST file text line being
42 char sdccopt[NINPUT]="";
43 char sdccopt_module[NINPUT]="";
44 char curr_module[NINPUT]="";
46 int oflag; /* Output file type flag
48 int mflag; /* Map output flag
51 int symflag; /* no$gmb .sym output flag
54 int xflag; /* Map file radix type flag
56 int pflag; /* print linker command file flag
58 int uflag; /* Listing relocation flag
60 int radix; /* current number conversion radix:
61 * 2 (binary), 8 (octal), 10 (decimal),
64 int line; /* current line number
66 int page; /* current page number
68 int lop; /* current line number on page
70 int pass; /* linker pass number
72 int rtcnt; /* count of elements in the
73 * rtval[] and rtflg[] arrays
75 Addr_T rtval[NTXT]; /* data associated with relocation
77 int rtflg[NTXT]; /* indicates if rtval[] value is
78 * to be sent to the output file.
79 * (always set in this linker)
81 int hilo; /* REL file byte ordering
83 int gline; /* LST file relocation active
86 int gcntr; /* LST file relocation active
91 * The structure lfile contains a pointer to a
92 * file specification string, the file type, and
93 * a link to the next lfile structure.
97 * struct lfile *f_flp; lfile link
98 * int f_type; File type
99 * char *f_idp; Pointer to file spec
102 struct lfile *filep; /* The pointers (lfile *) filep,
103 * (lfile *) cfp, and (FILE *) sfp
104 * are used in conjunction with
105 * the routine getline() to read
106 * asmlnk commands from
107 * (1) the standard input or
108 * (2) or a command file
109 * and to read the REL files
110 * sequentially as defined by the
111 * asmlnk input commands.
113 * The pointer *filep points to the
114 * beginning of a linked list of
117 struct lfile *cfp; /* The pointer *cfp points to the
118 * current lfile structure
120 struct lfile *startp;/* asmlnk startup file structure
122 struct lfile *linkp; /* pointer to first lfile structure
123 * containing an input REL file
126 struct lfile *lfp; /* pointer to current lfile structure
127 * being processed by parse()
129 FILE *ofp; /* Output file handle
132 FILE *mfp; /* Map output file handle
134 FILE *rfp; /* File handle for output
135 * address relocated ASxxxx
138 FILE *sfp; /* The file handle sfp points to the
139 * currently open file
141 FILE *tfp; /* File handle for input
142 * ASxxxx listing file
146 * The structures of head, area, areax, and sym are created
147 * as the REL files are read during the first pass of the
148 * linker. The struct head is created upon encountering a
149 * H directive in the REL file. The structure contains a
150 * link to a link file structure (struct lfile) which describes
151 * the file containing the H directive, the number of data/code
152 * areas contained in this header segment, the number of
153 * symbols referenced/defined in this header segment, a pointer
154 * to an array of pointers to areax structures (struct areax)
155 * created as each A directive is read, and a pointer to an
156 * array of pointers to symbol structures (struct sym) for
157 * all referenced/defined symbols. As H directives are read
158 * from the REL files a linked list of head structures is
159 * created by placing a link to the new head structure
160 * in the previous head structure.
164 * struct head *h_hp; Header link
165 * struct lfile *h_lfile; Associated file
166 * int h_narea; # of areas
167 * struct areax **a_list; Area list
168 * int h_nglob; # of global symbols
169 * struct sym **s_list; Global symbol list
170 * char m_id[NCPS]; Module name
173 struct head *headp; /* The pointer to the first
174 * head structure of a linked list
176 struct head *hp; /* Pointer to the current
181 * A structure area is created for each 'unique' data/code
182 * area definition found as the REL files are read. The
183 * struct area contains the name of the area, a flag byte
184 * which contains the area attributes (REL/CON/OVR/ABS),
185 * an area subtype (not used in this assembler), and the
186 * area base address and total size which will be filled
187 * in at the end of the first pass through the REL files.
188 * As A directives are read from the REL files a linked
189 * list of unique area structures is created by placing a
190 * link to the new area structure in the previous area structure.
194 * struct area *a_ap; Area link
195 * struct areax *a_axp; Area extension link
196 * Addr_T a_addr; Beginning address of area
197 * Addr_T a_size; Total size of the area
198 * char a_type; Area subtype
199 * char a_flag; Flag byte
200 * char a_id[NCPS]; Name
203 struct area *areap; /* The pointer to the first
204 * area structure of a linked list
206 struct area *ap; /* Pointer to the current
211 * An areax structure is created for every A directive found
212 * while reading the REL files. The struct areax contains a
213 * link to the 'unique' area structure referenced by the A
214 * directive and to the head structure this area segment is
215 * a part of. The size of this area segment as read from the
216 * A directive is placed in the areax structure. The beginning
217 * address of this segment will be filled in at the end of the
218 * first pass through the REL files. As A directives are read
219 * from the REL files a linked list of areax structures is
220 * created for each unique area. The final areax linked
221 * list has at its head the 'unique' area structure linked
222 * to the linked areax structures (one areax structure for
223 * each A directive for this area).
227 * struct areax *a_axp; Area extension link
228 * struct area *a_bap; Base area link
229 * struct head *a_bhp; Base header link
230 * Addr_T a_addr; Beginning address of section
231 * Addr_T a_size; Size of the area in section
234 struct areax *axp; /* Pointer to the current
239 * A sym structure is created for every unique symbol
240 * referenced/defined while reading the REL files. The
241 * struct sym contains the symbol's name, a flag value
242 * (not used in this linker), a symbol type denoting
243 * referenced/defined, and an address which is loaded
244 * with the relative address within the area in which
245 * the symbol was defined. The sym structure also
246 * contains a link to the area where the symbol was defined.
247 * The sym structures are linked into linked lists using
248 * the symbol link element.
252 * struct sym *s_sp; Symbol link
253 * struct areax *s_axp; Symbol area link
254 * char s_type; Symbol subtype
255 * char s_flag; Flag byte
256 * Addr_T s_addr; Address
257 * char s_id[NCPS]; Name
260 struct sym *symhash[NHASH]; /* array of pointers to NHASH
261 * linked symbol lists
264 * The struct base contains a pointer to a
265 * base definition string and a link to the next
270 * struct base *b_base; Base link
271 * char *b_strp; String pointer
274 struct base *basep; /* The pointer to the first
277 struct base *bsp; /* Pointer to the current
282 * The struct globl contains a pointer to a
283 * global definition string and a link to the next
288 * struct globl *g_globl; Global link
289 * char *g_strp; String pointer
292 struct globl *globlp;/* The pointer to the first
295 struct globl *gsp; /* Pointer to the current
300 * A structure sdp is created for each 'unique' paged
301 * area definition found as the REL files are read.
302 * As P directives are read from the REL files a linked
303 * list of unique sdp structures is created by placing a
304 * link to the new sdp structure in the previous area structure.
308 * struct area *s_area; Paged Area link
309 * struct areax *s_areax; Paged Area Extension Link
310 * Addr_T s_addr; Page address offset
313 struct sdp sdp; /* Base Page Structure */
316 * The structure rerr is loaded with the information
317 * required to report an error during the linking
318 * process. The structure contains an index value
319 * which selects the areax structure from the header
320 * areax structure list, a mode value which selects
321 * symbol or area relocation, the base address in the
322 * area section, an area/symbol list index value, and
323 * an area/symbol offset value.
327 * int aindex; Linking area
328 * int mode; Relocation mode
329 * Addr_T rtbase; Base address in section
330 * int rindex; Area/Symbol reloaction index
331 * Addr_T rval; Area/Symbol offset value
334 struct rerr rerr; /* Structure containing the
335 * linker error information
339 * The structure lbpath is created for each library
340 * path specification input by the -k option. The
341 * lbpath structures are linked into a list using
342 * the next link element.
345 * struct lbpath *next;
349 struct lbpath *lbphead; /* pointer to the first
350 * library path structure
354 * The structure lbname is created for all combinations of the
355 * library path specifications (input by the -k option) and the
356 * library file specifications (input by the -l option) that
357 * lead to an existing file. The element path points to
358 * the path string, element libfil points to the library
359 * file string, and the element libspc is the concatenation
360 * of the valid path and libfil strings.
362 * The lbpath structures are linked into a list
363 * using the next link element.
365 * Each library file contains a list of object files
366 * that are contained in the particular library. e.g.:
371 * Only one specification per line is allowed.
374 * struct lbname *next;
380 struct lbname *lbnhead; /* pointer to the first
381 * library name structure
385 * The function fndsym() searches through all combinations of the
386 * library path specifications (input by the -k option) and the
387 * library file specifications (input by the -l option) that
388 * lead to an existing file for a symbol definition.
390 * The structure lbfile is created for the first library
391 * object file which contains the definition for the
392 * specified undefined symbol.
394 * The element libspc points to the library file path specification
395 * and element relfil points to the object file specification string.
396 * The element filspc is the complete path/file specification for
397 * the library file to be imported into the linker. The
398 * file specicifation may be formed in one of two ways:
400 * (1) If the library file contained an absolute
401 * path/file specification then this becomes filspc.
404 * (2) If the library file contains a relative path/file
405 * specification then the concatenation of the path
406 * and this file specification becomes filspc.
409 * The lbpath structures are linked into a list
410 * using the next link element.
413 * struct lbfile *next;
419 struct lbfile *lbfhead; /* pointer to the first
420 * library file structure
424 * array of character types, one per
427 unsigned char ctype[128] = {
428 /*NUL*/ ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,
429 /*BS*/ ILL, SPACE, ILL, ILL, SPACE, ILL, ILL, ILL,
430 /*DLE*/ ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,
431 /*CAN*/ ILL, ILL, ILL, ILL, ILL, ILL, ILL, ILL,
432 /*SPC*/ SPACE, ETC, ETC, ETC, LETTER, BINOP, BINOP, ETC,
433 /*(*/ ETC, ETC, BINOP, BINOP, ETC, BINOP, LETTER, BINOP,
434 /*0*/ DGT2, DGT2, DGT8, DGT8, DGT8, DGT8, DGT8, DGT8,
435 /*8*/ DGT10, DGT10, ETC, ETC, BINOP, ETC, BINOP, ETC,
436 /*@*/ ETC, LTR16, LTR16, LTR16, LTR16, LTR16, LTR16, LETTER,
437 /*H*/ LETTER, LETTER, LETTER, LETTER, LETTER, LETTER, LETTER, LETTER,
438 /*P*/ LETTER, LETTER, LETTER, LETTER, LETTER, LETTER, LETTER, LETTER,
439 /*X*/ LETTER, LETTER, LETTER, ETC, ETC, ETC, BINOP, LETTER,
440 /*`*/ ETC, LTR16, LTR16, LTR16, LTR16, LTR16, LTR16, LETTER,
441 /*h*/ LETTER, LETTER, LETTER, LETTER, LETTER, LETTER, LETTER, LETTER,
442 /*p*/ LETTER, LETTER, LETTER, LETTER, LETTER, LETTER, LETTER, LETTER,
443 /*x*/ LETTER, LETTER, LETTER, ETC, BINOP, ETC, ETC, ETC
447 * an array of characters which
448 * perform the case translation function
453 /*NUL*/ '\000', '\001', '\002', '\003', '\004', '\005', '\006', '\007',
454 /*BS*/ '\010', '\011', '\012', '\013', '\014', '\015', '\016', '\017',
455 /*DLE*/ '\020', '\021', '\022', '\023', '\024', '\025', '\026', '\027',
456 /*CAN*/ '\030', '\031', '\032', '\033', '\034', '\035', '\036', '\037',
457 /*SPC*/ '\040', '\041', '\042', '\043', '\044', '\045', '\046', '\047',
458 /*(*/ '\050', '\051', '\052', '\053', '\054', '\055', '\056', '\057',
459 /*0*/ '\060', '\061', '\062', '\063', '\064', '\065', '\066', '\067',
460 /*8*/ '\070', '\071', '\072', '\073', '\074', '\075', '\076', '\077',
461 /*@*/ '\100', '\141', '\142', '\143', '\144', '\145', '\146', '\147',
462 /*H*/ '\150', '\151', '\152', '\153', '\154', '\155', '\156', '\157',
463 /*P*/ '\160', '\161', '\162', '\163', '\164', '\165', '\166', '\167',
464 /*X*/ '\170', '\171', '\172', '\133', '\134', '\135', '\136', '\137',
465 /*`*/ '\140', '\141', '\142', '\143', '\144', '\145', '\146', '\147',
466 /*h*/ '\150', '\151', '\152', '\153', '\154', '\155', '\156', '\157',
467 /*p*/ '\160', '\161', '\162', '\163', '\164', '\165', '\166', '\167',
468 /*x*/ '\170', '\171', '\172', '\173', '\174', '\175', '\176', '\177'