4 * (C) Copyright 1989-1995
11 * With contributions for the
12 * object libraries from
14 * kenh@cmf.nrl.navy.mil
19 * Extensions: P. Felber
22 #define EQ(A,B) !strcmp((A),(B))
23 #define MAXLINE 254 /*when using fgets*/
34 #define LKDIRSEPSTR "/"
37 #define LKDIRSEPSTR "\\"
41 #define LKDIRSEPSTR "\\"
46 void ToCygWin(char * filspc)
48 char posix_path[PATH_MAX];
49 void cygwin_conv_to_full_posix_path(char * win_path, char * posix_path);
50 cygwin_conv_to_full_posix_path(filspc, posix_path);
51 strcpy(filspc, posix_path);
57 * The module lklibr.c contains the functions which
58 * (1) specify the path(s) to library files [.LIB]
59 * (2) specify the library file(s) [.LIB] to search
60 * (3) search the library files for specific symbols
61 * and link the module containing this symbol
63 * lklibr.c contains the following functions:
75 typedef struct slibrarysymbol mlibrarysymbol;
76 typedef struct slibrarysymbol *pmlibrarysymbol;
78 struct slibrarysymbol {
83 typedef struct slibraryfile mlibraryfile;
84 typedef struct slibraryfile *pmlibraryfile;
91 char filename[FILSPC];
92 long offset; //if > 0, the embedded file offset in the library file libspc
93 pmlibrarysymbol symbols;
97 int buildlibraryindex();
100 /*)Function VOID addpath()
102 * The function addpath() creates a linked structure containing
103 * the paths to various object module library files.
106 * lbpath *lbph pointer to new path structure
107 * lbpath *lbp temporary pointer
110 * lbpath *lbphead The pointer to the first
114 * char getnb() lklex.c
115 * VOID * new() lksym.c
116 * int strlen() c_library
117 * char * strcpy() c_library
118 * VOID unget() lklex.c
121 * An lbpath structure may be created.
127 struct lbpath *lbph, *lbp;
129 lbph = (struct lbpath *) new (sizeof(struct lbpath));
130 if (lbphead == NULL) {
139 lbph->path = (char *) new (strlen(ip)+1);
140 strcpy(lbph->path, ip);
143 /*)Function VOID addlib()
145 * The function addlib() tests for the existance of a
146 * library path structure to determine the method of
147 * adding this library file to the library search structure.
149 * This function calls the function addfile() to actually
150 * add the library file to the search list.
153 * lbpath *lbph pointer to path structure
156 * lbpath *lbphead The pointer to the first
158 * ip a pointer to the library name
161 * VOID addfile() lklibr.c
162 * char getnb() lklex.c
163 * VOID unget() lklex.c
166 * The function addfile() may add the file to
167 * the library search list.
180 foundcount=addfile(NULL, ip);
184 for (lbph=lbphead; lbph; lbph=lbph->next)
186 foundcount+=addfile(lbph->path, ip);
191 printf("\n?ASlink-Warning-Couldn't find library '%s'", ip);
195 /*)Function int addfile(path,libfil)
197 * char *path library path specification
198 * char *libfil library file specification
200 * The function addfile() searches for the library file
201 * by concatenating the path and libfil specifications.
202 * if the library is found, an lbname structure is created
203 * and linked to any previously defined structures. This
204 * linked list is used by the function fndsym() to attempt
205 * to find any undefined symbols.
207 * The function does not give report an error on invalid
208 * path / file specifications or if the file is not found.
211 * lbname *lbnh pointer to new name structure
212 * lbname *lbn temporary pointer
215 * lbname *lbnhead The pointer to the first
219 * char getnb() lklex.c
220 * VOID * new() lksym.c
221 * int strlen() c_library
222 * char * strcpy() c_library
223 * VOID unget() lklex.c
226 * An lbname structure may be created.
229 * 1: the library was found
230 * 0: the library was not found
233 int addfile(char * path, char * libfil)
237 struct lbname *lbnh, *lbn;
242 str = (char *) new (strlen(path) + strlen(libfil) + 6);
245 if (str[strlen(str)-1] != LKDIRSEP)
247 strcat(str, LKDIRSEPSTR);
252 str = (char *) new (strlen(libfil) + 5);
255 if (libfil[0] == LKDIRSEP)
263 if(strchr(libfil, FSEPX) == NULL)
265 sprintf(&str[strlen(str)], "%clib", FSEPX);
271 /*Ok, that didn't work. Try with the 'libfil' name only*/
272 if(libfilinc) libfil--;
273 fp=fopen(libfil, "r");
276 /*Bingo! 'libfil' is the absolute path of the library*/
278 path=NULL;/*This way 'libfil' and 'path' will be rebuilt from 'str'*/
284 /*'path' can not be null since it is needed to find the '.o' files associated with
285 the library. So, get 'path' from 'str' and then chop it off and recreate 'libfil'.
286 That way putting 'path' and 'libfil' together will result into the original filepath
287 as contained in 'str'.*/
289 path = (char *) new (strlen(str));
291 for(j=strlen(path)-1; j>=0; j--)
293 if((path[j]=='\\')||(path[j]=='/'))
295 strcpy(libfil, &path[j+1]);
306 lbnh = (struct lbname *) new (sizeof(struct lbname));
320 lbnh->libfil = (char *) new (strlen(libfil) + 1);
321 strcpy(lbnh->libfil, libfil);
332 /*)Function VOID search()
334 * The function search() looks through all the symbol tables
335 * at the end of pass 1. If any undefined symbols are found
336 * then the function fndsym() is called. Function fndsym()
337 * searches any specified library files to automagically
338 * import the object modules containing the needed symbol.
340 * After a symbol is found and imported by the function
341 * fndsym() the symbol tables are again searched. The
342 * symbol tables are search until no more symbols can be
343 * resolved within the library files. This ensures that
344 * back references from one library module to another are
348 * int i temporary counter
349 * sym *sp pointer to a symbol structure
350 * int symfnd found a symbol flag
353 * sym *symhash[] array of pointers to symbol tables
356 * int fndsym() lklibr.c
359 * If a symbol is found then the library object module
360 * containing the symbol will be imported and linked.
366 register struct sym *sp;
367 register int i, symfnd;
370 * Look for undefined symbols. Keep
371 * searching until no more symbols are resolved.
377 * Look through all the symbols
379 for (i=0; i<NHASH; ++i) {
382 /* If we find an undefined symbol
383 * (one where S_DEF is not set), then
384 * try looking for it. If we find it
385 * in any of the libraries then
386 * increment symfnd. This will force
387 * another pass of symbol searching and
388 * make sure that back references work.
390 if ((sp->s_type & S_DEF) == 0) {
391 if (fndsym(sp->s_id)) {
401 /*Load a .rel file embedded in a sdcclib file*/
402 void LoadRel(FILE * libfp, char * ModName)
407 while (fgets(str, NINPUT, libfp) != NULL)
409 str[NINPUT+1] = '\0';
414 if(EQ(str, "<FILE>"))
416 fgets(str, NINPUT, libfp);
417 str[NINPUT+1] = '\0';
419 if(EQ(str, ModName)) state=1;
422 printf("Bad offset in library file str=%s, Modname=%s\n", str, ModName);
428 if(EQ(str, "<REL>")) state=2;
431 if(EQ(str, "</REL>")) return;
439 /*)Function VOID fndsym(name)
441 * char *name symbol name to find
443 * The function fndsym() searches through all combinations of the
444 * library path specifications (input by the -k option) and the
445 * library file specifications (input by the -l option) that
446 * lead to an existing file.
448 * The file specicifation may be formed in one of two ways:
450 * (1) If the library file contained an absolute
451 * path/file specification then this becomes filspc.
454 * (2) If the library file contains a relative path/file
455 * specification then the concatenation of the path
456 * and this file specification becomes filspc.
459 * The structure lbfile is created for the first library
460 * object file which contains the definition for the
461 * specified undefined symbol.
463 * If the library file [.LIB] contains file specifications for
464 * non existant files, no errors are returned.
467 * char buf[] [.REL] file input line
468 * char c [.REL] file input character
469 * FILE *fp file handle for object file
470 * lbfile *lbf temporary pointer
471 * lbfile *lbfh pointer to lbfile structure
472 * FILE *libfp file handle for library file
473 * lbname *lbnh pointer to lbname structure
474 * char *path file specification path
475 * char relfil[] [.REL] file specification
476 * char *str combined path and file specification
477 * char symname[] [.REL] file symbol string
480 * lbname *lbnhead The pointer to the first
482 * lbfile *lbfhead The pointer to the first
486 * int fclose() c_library
487 * int fgets() c_library
488 * FILE *fopen() c_library
489 * VOID free() c_library
490 * char getnb() lklex.c
491 * VOID lkexit() lkmain.c
492 * VOID loadfile() lklibr.c
493 * VOID * new() lksym.c
494 * char * sprintf() c_library
495 * int sscanf() c_library
496 * char * strcat() c_library
497 * char * strchr() c_library
498 * char * strcpy() c_library
499 * int strlen() c_library
500 * int strncmp() c_library
501 * VOID unget() lklex.c
504 * If the symbol is found then a new lbfile structure
505 * is created and added to the linked list of lbfile
506 * structures. The file containing the found symbol
512 /* First entry in the library object symbol cache */
515 int fndsym( char *name )
517 struct lbfile *lbfh, *lbf;
518 pmlibraryfile ThisLibr;
519 pmlibrarysymbol ThisSym = NULL;
521 pmlibraryfile FirstFound;
524 /* Build the index if this is the first call to fndsym */
528 /* Iterate through all library object files */
529 ThisLibr = libr.next;
532 /* Iterate through all symbols in an object file */
533 ThisSym = ThisLibr->symbols->next;
537 //printf("ThisSym->name=%s\n", ThisSym->name);
538 if (!strcmp(ThisSym->name, name))
540 if ((!ThisLibr->loaded) && (numfound==0))
542 /* Object file is not loaded - add it to the list */
543 lbfh = (struct lbfile *) new (sizeof(struct lbfile));
555 lbfh->libspc = ThisLibr->libspc;
556 lbfh->filspc = ThisLibr->str;
557 lbfh->relfil = (char *) new (strlen(ThisLibr->relfil) + 1);
558 strcpy(lbfh->relfil,ThisLibr->relfil);
559 lbfh->offset = ThisLibr->offset;
561 { /*For an embedded object file in a library*/
562 void loadfile_SdccLib(char * libspc, char * module, long offset);
563 loadfile_SdccLib(lbfh->libspc, lbfh->relfil, lbfh->offset);
566 { /*For a stand alone object file*/
567 loadfile(lbfh->filspc);
579 if( !( EQ(FirstFound->libspc, ThisLibr->libspc) &&
580 EQ(FirstFound->relfil, ThisLibr->relfil) ) )
584 printf("?Aslink-Warning-Definition of public symbol '%s'"
585 " found more than once:\n", name);
586 printf(" Library: '%s', Module: '%s'\n",
587 FirstFound->libspc, FirstFound->relfil);
589 printf(" Library: '%s', Module: '%s'\n",
590 ThisLibr->libspc, ThisLibr->relfil);
595 ThisSym=ThisSym->next; /* Next sym in library */
597 ThisLibr=ThisLibr->next; /* Next library in list */
602 pmlibraryfile buildlibraryindex_SdccLib(char * PathLib, FILE * libfp, char * DirLib, pmlibraryfile This)
604 char ModName[NCPS]="";
605 char FLine[MAXLINE+1];
607 long IndexOffset=0, FileOffset;
608 pmlibrarysymbol ThisSym = NULL;
613 fgets(FLine, MAXLINE, libfp);
619 if(EQ(FLine, "<INDEX>"))
621 /*The next line has the size of the index*/
623 fgets(FLine, MAXLINE, libfp);
625 IndexOffset=atol(FLine);
630 if(EQ(FLine, "<MODULE>"))
632 /*The next line has the name of the module and the offset
633 of the corresponding embedded file in the library*/
635 fgets(FLine, MAXLINE, libfp);
637 sscanf(FLine, "%s %ld", ModName, &FileOffset);
640 /*create a new libraryfile object for this module*/
641 This->next = (pmlibraryfile)new( sizeof( mlibraryfile ));
642 if (This->next == NULL)
644 printf("panic: can't allocate memory.\n");
650 This->loaded=-1; /*Kind of useless, but...*/
651 This->offset=FileOffset+IndexOffset;
652 This->libspc=PathLib;
653 strcpy(This->relfil, ModName);
656 sprintf(This->filename, "%s%s%co", DirLib, ModName, FSEPX);
658 sprintf(This->filename, "%s%s%crel", DirLib, ModName, FSEPX);
661 This->str=This->filename;
663 ThisSym = This->symbols = (pmlibrarysymbol)malloc( sizeof(mlibrarysymbol));
664 ThisSym->next = NULL;
666 else if(EQ(FLine, "</INDEX>"))
668 return This; /*Finish, get out of here*/
672 if(EQ(FLine, "</MODULE>"))
675 /*Create the index for the next module*/
681 ThisSym->next = (pmlibrarysymbol)malloc(sizeof(mlibrarysymbol));
682 ThisSym=ThisSym->next;
685 printf("panic: can't allocate memory.\n");
689 strcpy(ThisSym->name, FLine);
694 return This; /*State machine should never reach this point, but just in case...*/
699 return This; /*State machine should never reach this point, but just in case...*/
703 /* buildlibraryindex - build an in-memory cache of the symbols contained in
706 int buildlibraryindex(void)
710 char relfil[NINPUT+2], *str, *path;
711 char buf[NINPUT+2], c;
712 char symname[NINPUT+2];
714 pmlibrarysymbol ThisSym;
718 /* Iterate through all library files */
719 /*1*/ for (lbnh=lbnhead; lbnh; lbnh=lbnh->next) {
720 libfp = fopen( lbnh->libspc, "r" );
725 * Read in a line from the library file.
726 * This is the relative file specification
727 * for a .REL file in this library.
730 /*2*/ while (fgets(relfil, NINPUT, libfp) != NULL) {
731 relfil[NINPUT+1] = '\0';
734 str = (char *)new(strlen(path)+strlen(relfil)+6);
739 if (str[strlen(str)-1] != '/') {
742 if (str[strlen(str)-1] != '\\') {
746 if (str[strlen(str)-1] != '\\') {
752 str = (char *)new(strlen(relfil) + 5);
755 if(strcmp(relfil, "<SDCCLIB>")==0)
757 /*Get the built in index of a library*/
758 This=buildlibraryindex_SdccLib(lbnh->libspc, libfp, str, This);
761 break; /*get the index for next library*/
764 /*From here down, build the index for the original library
768 if (relfil[0] == '/') {
770 if (relfil[0] == '\\') {
773 if (relfil[0] == '\\') {
775 strcat(str,relfil+1);
779 if(strchr(str,FSEPX) == NULL) {
781 sprintf(&str[strlen(str)], "%co", FSEPX);
783 sprintf(&str[strlen(str)], "%crel", FSEPX);
786 /*3*/ if ((fp = fopen(str, "r")) != NULL) {
788 /* Opened OK - create a new libraryfile object for it */
789 This->next = (pmlibraryfile)new( sizeof( mlibraryfile ));
790 if (This->next == NULL) {
791 printf("panic: can't allocate memory.\n");
798 This->offset=-1; /*There should be a rel file*/
800 strcpy( This->filename, str );
802 ThisSym = This->symbols = (pmlibrarysymbol)malloc( sizeof(mlibrarysymbol));
803 ThisSym->next = NULL;
806 * Read in the object file. Look for lines that
807 * begin with "S" and end with "D". These are
808 * symbol table definitions. If we find one, see
809 * if it is our symbol. Make sure we only read in
810 * our object file and don't go into the next one.
813 /*4*/ while (fgets(buf, NINPUT, fp) != NULL) {
815 buf[NINPUT+1] = '\0';
816 buf[strlen(buf) - 1] = '\0';
819 * Skip everything that's not a symbol record.
825 * When a 'T line' is found terminate file scan.
826 * All 'S line's preceed 'T line's in .REL files.
831 sscanf(buf, "S %s %c", symname, &c);
833 /* If it's an actual symbol, record it */
834 /*5*/ if (c == 'D') {
835 ThisSym->next = (pmlibrarysymbol)malloc(sizeof(mlibrarysymbol));
836 ThisSym=ThisSym->next;
837 if (ThisSym == NULL) {
838 printf("panic: can't allocate memory.\n");
844 strcpy(This->relfil,relfil);
845 strcpy(ThisSym->name, symname);
846 This->libspc = lbnh->libspc;
848 } /* Closes while - read object file */
850 } /* Closes if object file opened OK */
851 } /* Ends while - processing all in libr */
853 } /* Ends good open of libr file */
860 /*Check for a symbol in a SDCC library. If found, add the embedded .rel.
861 The library must be created with the SDCC librarian 'sdcclib' since the
862 linking process depends on the correct file offsets embedded in the library
865 int SdccLib(char * PathLib, FILE * libfp, char * DirLib, char * SymName)
867 struct lbfile *lbfh, *lbf;
868 char ModName[NCPS]="";
869 char FLine[MAXLINE+1];
871 long IndexOffset=0, FileOffset;
876 fgets(FLine, MAXLINE, libfp);
882 if(EQ(FLine, "<INDEX>"))
884 /*The next line has the size of the index*/
886 fgets(FLine, MAXLINE, libfp);
888 IndexOffset=atol(FLine);
893 if(EQ(FLine, "<MODULE>"))
895 /*The next line has the name of the module and the offset
896 of the corresponding embedded file in the library*/
898 fgets(FLine, MAXLINE, libfp);
900 sscanf(FLine, "%s %ld", ModName, &FileOffset);
903 else if(EQ(FLine, "</INDEX>"))
905 /*Reached the end of the index. The symbol is not in this library.*/
910 if(EQ(FLine, "</MODULE>"))
912 /*The symbol is not in this module, try the next one*/
917 /*Check if this is the symbol we are looking for.*/
918 if (strncmp(SymName, FLine, NCPS)==0)
920 /*The symbol is in this module.*/
922 /*As in the original library format, it is assumed that the .rel
923 files reside in the same directory as the lib files.*/
924 strcat(DirLib, ModName);
926 sprintf(&DirLib[strlen(DirLib)], "%co", FSEPX);
928 sprintf(&DirLib[strlen(DirLib)], "%crel", FSEPX);
931 /*If this module has been loaded already don't load it again.*/
935 if(EQ(DirLib, lbf->filspc)) return 1;/*Already loaded*/
939 /*Add the embedded file to the list of files to be loaded in
940 the second pass. That is performed latter by the function
942 lbfh = (struct lbfile *) new (sizeof(struct lbfile));
955 lbfh->libspc = PathLib;
956 lbfh->filspc = DirLib;
957 lbfh->relfil = (char *) new (strlen(ModName) + 1);
958 strcpy(lbfh->relfil, ModName);
959 /*Library embedded file, so lbfh->offset must be >=0*/
960 lbfh->offset = IndexOffset+FileOffset;
962 /*Jump to where the .rel begins and load it.*/
963 fseek(libfp, lbfh->offset, SEEK_SET);
964 LoadRel(libfp, ModName);
966 return 1; /*Found the symbol, so success!*/
972 return 0; /*It should never reach this point, but just in case...*/
977 return 0; /*The symbol is not in this library*/
986 struct lbfile *lbfh, *lbf;
987 char relfil[NINPUT+2];
989 char symname[NINPUT];
995 * Search through every library in the linked list "lbnhead".
998 /*1*/ for (lbnh=lbnhead; lbnh; lbnh=lbnh->next) {
999 if ((libfp = fopen(lbnh->libspc, "r")) == NULL) {
1000 fprintf(stderr, "Cannot open library file %s\n",
1007 * Read in a line from the library file.
1008 * This is the relative file specification
1009 * for a .REL file in this library.
1012 /*2*/ while (fgets(relfil, NINPUT, libfp) != NULL) {
1013 relfil[NINPUT+1] = '\0';
1016 str = (char *) new (strlen(path)+strlen(relfil)+6);
1021 if (str[strlen(str)-1] != '/') {
1024 if (str[strlen(str)-1] != '\\') {
1028 if (str[strlen(str)-1] != '\\') {
1034 str = (char *) new (strlen(relfil) + 5);
1037 /*See if this is a library with embedded files*/
1038 if(strcmp(relfil, "<SDCCLIB>")==0)
1040 result=SdccLib(lbnh->libspc, libfp, str, name);
1042 if(result) return(1); /*Found the symbol*/
1044 /*The symbol is not in the current library,
1045 check the next library in the list*/
1049 /*From here down is the support for libraries in the original format*/
1052 if (relfil[0] == '/') {
1054 if (relfil[0] == '\\') {
1057 if (relfil[0] == '\\') {
1059 strcat(str,relfil+1);
1063 if(strchr(relfil,FSEPX) == NULL) {
1065 sprintf(&str[strlen(str)], "%co", FSEPX);
1067 sprintf(&str[strlen(str)], "%crel", FSEPX);
1070 /*3*/ if ((fp = fopen(str, "r")) != NULL) {
1073 * Read in the object file. Look for lines that
1074 * begin with "S" and end with "D". These are
1075 * symbol table definitions. If we find one, see
1076 * if it is our symbol. Make sure we only read in
1077 * our object file and don't go into the next one.
1080 /*4*/ while (fgets(buf, NINPUT, fp) != NULL) {
1082 buf[NINPUT+1] = '\0';
1083 buf[strlen(buf) - 1] = '\0';
1086 * Skip everything that's not a symbol record.
1092 * When a 'T line' is found terminate file scan.
1093 * All 'S line's preceed 'T line's in .REL files.
1098 sscanf(buf, "S %s %c", symname, &c);
1101 * If we find a symbol definition for the
1102 * symbol we're looking for, load in the
1103 * file and add it to lbfhead so it gets
1104 * loaded on pass number 2.
1106 /*5*/ if (strncmp(symname, name, NCPS) == 0 && c == 'D') {
1108 lbfh = (struct lbfile *) new (sizeof(struct lbfile));
1109 if (lbfhead == NULL) {
1117 lbfh->libspc = lbnh->libspc;
1119 lbfh->relfil = (char *) new (strlen(relfil) + 1);
1120 lbfh->offset = -1; /*Stand alone rel file*/
1121 strcpy(lbfh->relfil,relfil);
1139 #endif /* INDEXLIB */
1141 void loadfile_SdccLib(char * libspc, char * module, long offset)
1149 if ((fp = fopen(libspc,"r")) != NULL)
1151 fseek(fp, offset, SEEK_SET);
1152 LoadRel(fp, module);
1157 /*)Function VOID library()
1159 * The function library() links all the library object files
1160 * contained in the lbfile structures.
1163 * lbfile *lbfh pointer to lbfile structure
1166 * lbfile *lbfhead pointer to first lbfile structure
1169 * VOID loadfile lklibr.c
1172 * Links all files contained in the lbfile structures.
1178 struct lbfile *lbfh;
1180 for (lbfh=lbfhead; lbfh; lbfh=lbfh->next)
1184 /*Stand alone rel file (original lib format)*/
1185 loadfile(lbfh->filspc);
1189 /*rel file embedded in lib (new lib format)*/
1190 loadfile_SdccLib(lbfh->libspc, lbfh->relfil, lbfh->offset);
1195 /*)Function VOID loadfile(filspc)
1197 * char *filspc library object file specification
1199 * The function loadfile() links the library object module.
1202 * FILE *fp file handle
1203 * int i input line length
1204 * char str[] file input line
1207 * char *ip pointer to linker input string
1210 * int fclose() c_library
1211 * int fgets() c_library
1212 * FILE * fopen() c_library
1213 * VOID link() lkmain.c
1214 * int strlen() c_library
1217 * If file exists it is linked.
1232 if ((fp = fopen(filspc,"r")) != NULL) {
1233 while (fgets(str, NINPUT, fp) != NULL) {
1234 str[NINPUT+1] = '\0';
1235 i = strlen(str) - 1;
1245 printf("Couldn't find file %s\n", filspc);