+++ /dev/null
-/* lklibr.c */
-
-/*
- * (C) Copyright 1989-1995
- * All Rights Reserved
- *
- * Alan R. Baldwin
- * 721 Berkeley St.
- * Kent, Ohio 44240
- *
- * With contributions for the
- * object libraries from
- * Ken Hornstein
- * kenh@cmf.nrl.navy.mil
- *
- */
-
-#define EQ(A,B) !strcmp((A),(B))
-#define MAXLINE 254 /*when using fgets*/
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include "aslink.h"
-
-/*)Module lklibr.c
- *
- * The module lklibr.c contains the functions which
- * (1) specify the path(s) to library files [.LIB]
- * (2) specify the library file(s) [.LIB] to search
- * (3) search the library files for specific symbols
- * and link the module containing this symbol
- *
- * lklibr.c contains the following functions:
- * VOID addpath()
- * VOID addlib()
- * VOID addfile()
- * VOID search()
- * VOID fndsym()
- * VOID library()
- * VOID loadfile()
- *
- */
-
-/*)Function VOID addpath()
- *
- * The function addpath() creates a linked structure containing
- * the paths to various object module library files.
- *
- * local variables:
- * lbpath *lbph pointer to new path structure
- * lbpath *lbp temporary pointer
- *
- * global variables:
- * lbpath *lbphead The pointer to the first
- * path structure
- *
- * functions called:
- * char getnb() lklex.c
- * VOID * new() lksym.c
- * int strlen() c_library
- * char * strcpy() c_library
- * VOID unget() lklex.c
- *
- * side effects:
- * An lbpath structure may be created.
- */
-
-VOID
-addpath()
-{
- struct lbpath *lbph, *lbp;
-
- lbph = (struct lbpath *) new (sizeof(struct lbpath));
- if (lbphead == NULL) {
- lbphead = lbph;
- } else {
- lbp = lbphead;
- while (lbp->next)
- lbp = lbp->next;
- lbp->next = lbph;
- }
- unget(getnb());
- lbph->path = (char *) new (strlen(ip)+1);
- strcpy(lbph->path, ip);
-}
-
-/*)Function VOID addlib()
- *
- * The function addlib() tests for the existance of a
- * library path structure to determine the method of
- * adding this library file to the library search structure.
- *
- * This function calls the function addfile() to actually
- * add the library file to the search list.
- *
- * local variables:
- * lbpath *lbph pointer to path structure
- *
- * global variables:
- * lbpath *lbphead The pointer to the first
- * path structure
- * ip a pointer to the library name
- *
- * functions called:
- * VOID addfile() lklibr.c
- * char getnb() lklex.c
- * VOID unget() lklex.c
- *
- * side effects:
- * The function addfile() may add the file to
- * the library search list.
- */
-
-VOID
-addlib()
-{
- struct lbpath *lbph;
- int foundcount=0;
-
- unget(getnb());
-
- if (lbphead == NULL)
- {
- foundcount=addfile(NULL, ip);
- }
- else
- {
- for (lbph=lbphead; lbph; lbph=lbph->next)
- {
- foundcount+=addfile(lbph->path, ip);
- }
- }
- if(foundcount == 0)
- {
- printf("?ASlink-Warning-Couldn't find library '%s'\n", ip);
- }
-}
-
-/*)Function int addfile(path,libfil)
- *
- * char *path library path specification
- * char *libfil library file specification
- *
- * The function addfile() searches for the library file
- * by concatenating the path and libfil specifications.
- * if the library is found, an lbname structure is created
- * and linked to any previously defined structures. This
- * linked list is used by the function fndsym() to attempt
- * to find any undefined symbols.
- *
- * The function does not give report an error on invalid
- * path / file specifications or if the file is not found.
- *
- * local variables:
- * lbname *lbnh pointer to new name structure
- * lbname *lbn temporary pointer
- *
- * global variables:
- * lbname *lbnhead The pointer to the first
- * path structure
- *
- * functions called:
- * char getnb() lklex.c
- * VOID * new() lksym.c
- * int strlen() c_library
- * char * strcpy() c_library
- * VOID unget() lklex.c
- *
- * side effects:
- * An lbname structure may be created.
- *
- * return:
- * 1: the library was found
- * 0: the library was not found
- */
-
-int addfile(char * path, char * libfil)
-{
- FILE *fp;
- char *str;
- struct lbname *lbnh, *lbn;
-#ifdef OTHERSYSTEM
- int libfilinc=0;
-#endif
-
- if (path != NULL)
- {
- str = (char *) new (strlen(path) + strlen(libfil) + 6);
- strcpy(str,path);
-#ifdef OTHERSYSTEM
- if (strlen(str) && (str[strlen(str)-1] != '/') && (str[strlen(str)-1] != '\\'))
- {
- strcat(str,"/");
- }
-#endif
- }
- else
- {
- str = (char *) new (strlen(libfil) + 5);
- }
-
-#ifdef OTHERSYSTEM
- if ((libfil[0] == '/') || (libfil[0] == '\\'))
- {
- libfil++;
- libfilinc=1;
- }
-#endif
-
- strcat(str, libfil);
- if(strchr(libfil, FSEPX) == NULL)
- {
- sprintf(&str[strlen(str)], "%clib", FSEPX);
- }
-
- fp=fopen(str, "r");
- if(fp == NULL)
- {
- /*Ok, that didn't work. Try with the 'libfil' name only*/
-#ifdef OTHERSYSTEM
- if(libfilinc) libfil--;
-#endif
- fp=fopen(libfil, "r");
- if(fp != NULL)
- {
- /*Bingo! 'libfil' is the absolute path of the library*/
- strcpy(str, libfil);
- path=NULL;/*This way 'libfil' and 'path' will be rebuilt from 'str'*/
- }
- }
-
- if(path==NULL)
- {
- /*'path' can not be null since it is needed to find the '.rel' files associated with
- the library. So, get 'path' from 'str' and then chop it off and recreate 'libfil'.
- That way putting 'path' and 'libfil' together will result into the original filepath
- as contained in 'str'.*/
- int j;
- path = (char *) new (strlen(str) + 1);
- strcpy(path, str);
- for(j=strlen(path)-1; j>=0; j--)
- {
- if((path[j] == '/') || (path[j] == '\\'))
- {
- strcpy(libfil, &path[j+1]);
- path[j+1]=0;
- break;
- }
- }
- if(j<=0) path[0]=0;
- }
-
- if (fp != NULL)
- {
- fclose(fp);
- lbnh = (struct lbname *) new (sizeof(struct lbname));
- if (lbnhead == NULL)
- {
- lbnhead = lbnh;
- }
- else
- {
- lbn = lbnhead;
- while (lbn->next)
- lbn = lbn->next;
- lbn->next = lbnh;
- }
-
- lbnh->path = path;
- lbnh->libfil = (char *) new (strlen(libfil) + 1);
- strcpy(lbnh->libfil,libfil);
- lbnh->libspc = str;
- return 1;
- }
- else
- {
- free(str);
- return 0;
- }
-}
-
-/*)Function VOID search()
- *
- * The function search() looks through all the symbol tables
- * at the end of pass 1. If any undefined symbols are found
- * then the function fndsym() is called. Function fndsym()
- * searches any specified library files to automagically
- * import the object modules containing the needed symbol.
- *
- * After a symbol is found and imported by the function
- * fndsym() the symbol tables are again searched. The
- * symbol tables are search until no more symbols can be
- * resolved within the library files. This ensures that
- * back references from one library module to another are
- * also resolved.
- *
- * local variables:
- * int i temporary counter
- * sym *sp pointer to a symbol structure
- * int symfnd found a symbol flag
- *
- * global variables:
- * sym *symhash[] array of pointers to symbol tables
- *
- * functions called:
- * int fndsym() lklibr.c
- *
- * side effects:
- * If a symbol is found then the library object module
- * containing the symbol will be imported and linked.
- */
-
-VOID
-search()
-{
- register struct sym *sp;
- register int i,symfnd;
-
- /*
- * Look for undefined symbols. Keep
- * searching until no more symbols are resolved.
- */
- symfnd = 1;
- while (symfnd) {
- symfnd = 0;
- /*
- * Look through all the symbols
- */
- for (i=0; i<NHASH; ++i) {
- sp = symhash[i];
- while (sp) {
- /* If we find an undefined symbol
- * (one where S_DEF is not set), then
- * try looking for it. If we find it
- * in any of the libraries then
- * increment symfnd. This will force
- * another pass of symbol searching and
- * make sure that back references work.
- */
- if ((sp->s_type & S_DEF) == 0) {
- if (fndsym(sp->s_id)) {
- symfnd++;
- }
- }
- sp = sp->s_sp;
- }
- }
- }
-}
-
-/*Load a .rel file embedded in a sdcclib file*/
-void LoadRel(FILE * libfp, char * ModName)
-{
- char str[NINPUT+2];
- int state=0;
-
- while (fgets(str, NINPUT, libfp) != NULL)
- {
- str[NINPUT+1] = '\0';
- chop_crlf(str);
- switch(state)
- {
- case 0:
- if(EQ(str, "<FILE>"))
- {
- fgets(str, NINPUT, libfp);
- str[NINPUT+1] = '\0';
- chop_crlf(str);
- if(EQ(str, ModName)) state=1;
- else
- {
- printf("Bad offset in library file str=%s, Modname=%s\n", str, ModName);
- lkexit(1);
- }
- }
- break;
- case 1:
- if(EQ(str, "<REL>")) state=2;
- break;
- case 2:
- if(EQ(str, "</REL>")) return;
- ip = str;
- link_main();
- break;
- }
- }
-}
-
-/*Load an .adb file embedded in a sdcclib file. If there is
-something between <ADB> and </ADB> returns 1, otherwise returns 0.
-This way the aomf51 will not have uselless empty modules. */
-
-int LoadAdb(FILE * libfp)
-{
- char str[MAXLINE+1];
- int state=0;
- int ToReturn=0;
-
- while (fgets(str, MAXLINE, libfp) != NULL)
- {
- str[NINPUT+1] = '\0';
- chop_crlf(str);
- switch(state)
- {
- case 0:
- if(EQ(str, "<ADB>")) state=1;
- break;
- case 1:
- if(EQ(str, "</ADB>")) return ToReturn;
- fprintf(dfp, "%s\n", str);
- ToReturn=1;
- break;
- }
- }
- return ToReturn;
-}
-
-/*Check for a symbol in a SDCC library. If found, add the embedded .rel and
-.adb files from the library. The library must be created with the SDCC
-librarian 'sdcclib' since the linking process depends on the correct file offsets
-embedded in the library file.*/
-
-int SdccLib(char * PathLib, FILE * libfp, char * DirLib, char * SymName)
-{
- struct lbfile *lbfh, *lbf;
- char ModName[NCPS]="";
- char FLine[MAXLINE+1];
- int state=0;
- long IndexOffset=0, FileOffset;
-
- while(!feof(libfp))
- {
- FLine[0]=0;
- fgets(FLine, MAXLINE, libfp);
- chop_crlf(FLine);
-
- switch(state)
- {
- case 0:
- if(EQ(FLine, "<INDEX>"))
- {
- /*The next line has the size of the index*/
- FLine[0]=0;
- fgets(FLine, MAXLINE, libfp);
- chop_crlf(FLine);
- IndexOffset=atol(FLine);
- state=1;
- }
- break;
- case 1:
- if(EQ(FLine, "<MODULE>"))
- {
- /*The next line has the name of the module and the offset
- of the corresponding embedded file in the library*/
- FLine[0]=0;
- fgets(FLine, MAXLINE, libfp);
- chop_crlf(FLine);
- sscanf(FLine, "%s %ld", ModName, &FileOffset);
- state=2;
- }
- else if(EQ(FLine, "</INDEX>"))
- {
- /*Reached the end of the index. The symbol is not in this library.*/
- return 0;
- }
- break;
- case 2:
- if(EQ(FLine, "</MODULE>"))
- {
- /*The symbol is not in this module, try the next one*/
- state=1;
- }
- else
- {
- /*Check if this is the symbol we are looking for.*/
- if (strncmp(SymName, FLine, NCPS)==0)
- {
- /*The symbol is in this module.*/
-
- /*As in the original library format, it is assumed that the .rel
- files reside in the same directory as the lib files.*/
- strcat(DirLib, ModName);
- sprintf(&DirLib[strlen(DirLib)], "%crel", FSEPX);
-
- /*If this module has been loaded already don't load it again.*/
- lbf = lbfhead;
- while (lbf)
- {
- if(EQ(DirLib, lbf->filspc)) return 1;/*Already loaded*/
- lbf=lbf->next;
- }
-
- /*Add the embedded file to the list of files to be loaded in
- the second pass. That is performed latter by the function
- library() below.*/
- lbfh = (struct lbfile *) new (sizeof(struct lbfile));
- if (lbfhead == NULL)
- {
- lbfhead = lbfh;
- }
- else
- {
- lbf = lbfhead;
- while (lbf->next)
- lbf = lbf->next;
- lbf->next = lbfh;
- }
-
- lbfh->libspc = PathLib;
- lbfh->filspc = DirLib;
- lbfh->relfil = (char *) new (strlen(ModName) + 1);
- strcpy(lbfh->relfil, ModName);
- /*Library embedded file, so lbfh->offset must be >=0*/
- lbfh->offset = IndexOffset+FileOffset;
-
- /*Jump to where the .rel begins and load it.*/
- fseek(libfp, lbfh->offset, SEEK_SET);
- LoadRel(libfp, ModName);
-
- /* if cdb information required & .adb file present */
- if (dflag && dfp)
- {
- if(LoadAdb(libfp))
- SaveLinkedFilePath(DirLib);
- }
- return 1; /*Found the symbol, so success!*/
- }
- }
- break;
-
- default:
- return 0; /*It should never reach this point, but just in case...*/
- break;
- }
- }
-
- return 0; /*The symbol is not in this library*/
-}
-
-/*)Function VOID fndsym(name)
- *
- * char *name symbol name to find
- *
- * The function fndsym() searches through all combinations of the
- * library path specifications (input by the -k option) and the
- * library file specifications (input by the -l option) that
- * lead to an existing file.
- *
- * The file specicifation may be formed in one of two ways:
- *
- * (1) If the library file contained an absolute
- * path/file specification then this becomes filspc.
- * (i.e. C:\...)
- *
- * (2) If the library file contains a relative path/file
- * specification then the concatenation of the path
- * and this file specification becomes filspc.
- * (i.e. \...)
- *
- * The structure lbfile is created for the first library
- * object file which contains the definition for the
- * specified undefined symbol.
- *
- * If the library file [.LIB] contains file specifications for
- * non existant files, no errors are returned.
- *
- * local variables:
- * char buf[] [.REL] file input line
- * char c [.REL] file input character
- * FILE *fp file handle for object file
- * lbfile *lbf temporary pointer
- * lbfile *lbfh pointer to lbfile structure
- * FILE *libfp file handle for library file
- * lbname *lbnh pointer to lbname structure
- * char *path file specification path
- * char relfil[] [.REL] file specification
- * char *str combined path and file specification
- * char symname[] [.REL] file symbol string
- *
- * global variables:
- * lbname *lbnhead The pointer to the first
- * name structure
- * lbfile *lbfhead The pointer to the first
- * file structure
- *
- * functions called:
- * int fclose() c_library
- * int fgets() c_library
- * FILE *fopen() c_library
- * VOID free() c_library
- * char getnb() lklex.c
- * VOID lkexit() lkmain.c
- * VOID loadfile() lklibr.c
- * VOID * new() lksym.c
- * char * sprintf() c_library
- * int sscanf() c_library
- * char * strcat() c_library
- * char * strchr() c_library
- * char * strcpy() c_library
- * int strlen() c_library
- * int strncmp() c_library
- * VOID unget() lklex.c
- *
- * side effects:
- * If the symbol is found then a new lbfile structure
- * is created and added to the linked list of lbfile
- * structures. The file containing the found symbol
- * is linked.
- */
-
-int
-fndsym(name)
-char *name;
-{
- FILE *libfp, *fp;
- struct lbname *lbnh;
- struct lbfile *lbfh, *lbf;
- char relfil[NINPUT+2];
- char buf[NINPUT+2];
- char symname[NINPUT];
- char *path,*str;
- char c;
- int result;
-
- /*
- * Search through every library in the linked list "lbnhead".
- */
-
- for (lbnh=lbnhead; lbnh; lbnh=lbnh->next)
- {
- if ((libfp = fopen(lbnh->libspc, "r")) == NULL)
- {
- fprintf(stderr, "Cannot open library file %s\n",
- lbnh->libspc);
- lkexit(1);
- }
- path = lbnh->path;
-
- /*
- * Read in a line from the library file.
- * This is the relative file specification
- * for a .REL file in this library.
- */
-
- while (fgets(relfil, NINPUT, libfp) != NULL)
- {
- relfil[NINPUT+1] = '\0';
- chop_crlf(relfil);
- if (path != NULL)
- {
- str = (char *) new (strlen(path)+strlen(relfil)+6);
- strcpy(str,path);
-#ifdef OTHERSYSTEM
- if (strlen(str) && (str[strlen(str)-1] != '/') && (str[strlen(str)-1] != '\\'))
- {
- strcat(str,"/");
- }
-#endif
- }
- else
- {
- str = (char *) new (strlen(relfil) + 5);
- }
-
- if(strcmp(relfil, "<SDCCLIB>")==0)
- {
- result=SdccLib(lbnh->libspc, libfp, str, name);
- fclose(libfp);
- if(result) return(1); /*Found the symbol*/
- free(str);
- /*The symbol is not in the current library,
- check the next library in the list*/
- break;
- }
-
- /*From here down is the support for libraries in the original format*/
- if (relfil[0] == '\\')
- {
- strcat(str,relfil+1);
- }
- else
- {
- strcat(str,relfil);
- }
-
- if(strchr(relfil, FSEPX) == NULL)
- {
- sprintf(&str[strlen(str)], "%crel", FSEPX);
- }
-
- if ((fp = fopen(str, "r")) != NULL)
- {
-
- /*
- * Read in the object file. Look for lines that
- * begin with "S" and end with "D". These are
- * symbol table definitions. If we find one, see
- * if it is our symbol. Make sure we only read in
- * our object file and don't go into the next one.
- */
-
- while (fgets(buf, NINPUT, fp) != NULL)
- {
- buf[NINPUT+1] = '\0';
- chop_crlf(buf);
- /*
- * Skip everything that's not a symbol record.
- */
- if (buf[0] != 'S') continue;
-
- /*
- * When a 'T line' is found terminate file scan.
- * All 'S line's preceed 'T line's in .REL files.
- */
- if (buf[0] == 'T') break;
-
- sscanf(buf, "S %s %c", symname, &c);
-
- /*
- * If we find a symbol definition for the
- * symbol we're looking for, load in the
- * file and add it to lbfhead so it gets
- * loaded on pass number 2.
- */
- if (strncmp(symname, name, NCPS) == 0 && c == 'D')
- {
- lbfh = (struct lbfile *) new (sizeof(struct lbfile));
- if (lbfhead == NULL)
- {
- lbfhead = lbfh;
- }
- else
- {
- lbf = lbfhead;
- while (lbf->next)
- lbf = lbf->next;
- lbf->next = lbfh;
- }
-
- lbfh->libspc = lbnh->libspc;
- lbfh->filspc = str;
- lbfh->relfil = (char *) new (strlen(relfil) + 1);
- lbfh->offset = -1; /*Stand alone rel file*/
- strcpy(lbfh->relfil,relfil);
- fclose(fp);
- fclose(libfp);
-
- /* if cdb information required & adb file present */
- if (dflag && dfp)
- {
- FILE *xfp = afile(str,"adb",0); //JCF: Nov 30, 2002
- if (xfp)
- {
- SaveLinkedFilePath(str);
- copyfile(dfp,xfp);
- fclose(xfp);
- }
- }
- loadfile(str);
- return (1);
- }
- }
- fclose(fp);
- }
- free(str);
- }
- fclose(libfp);
- }
- return(0);
-}
-
-void loadfile_SdccLib(char * libspc, char * module, long offset)
-{
- FILE *fp;
-
- if ((fp = fopen(libspc,"r")) != NULL)
- {
- fseek(fp, offset, SEEK_SET);
- LoadRel(fp, module);
- fclose(fp);
- }
-}
-
-/*)Function VOID library()
- *
- * The function library() links all the library object files
- * contained in the lbfile structures.
- *
- * local variables:
- * lbfile *lbfh pointer to lbfile structure
- *
- * global variables:
- * lbfile *lbfhead pointer to first lbfile structure
- *
- * functions called:
- * VOID loadfile lklibr.c
- *
- * side effects:
- * Links all files contained in the lbfile structures.
- */
-
-VOID
-library()
-{
- struct lbfile *lbfh;
-
- for (lbfh=lbfhead; lbfh; lbfh=lbfh->next)
- {
- if(lbfh->offset<0)
- {
- /*Stand alone rel file (original lib format)*/
- loadfile(lbfh->filspc);
- }
- else
- {
- /*rel file embedded in lib (new lib format)*/
- loadfile_SdccLib(lbfh->libspc, lbfh->relfil, lbfh->offset);
- }
- }
-}
-
-/*)Function VOID loadfile(filspc)
- *
- * char *filspc library object file specification
- *
- * The function loadfile() links the library object module.
- *
- * local variables:
- * FILE *fp file handle
- * int i input line length
- * char str[] file input line
- *
- * global variables:
- * char *ip pointer to linker input string
- *
- * functions called:
- * int fclose() c_library
- * int fgets() c_library
- * FILE * fopen() c_library
- * VOID link_main() lkmain.c
- * int strlen() c_library
- *
- * side effects:
- * If file exists it is linked.
- */
-
-VOID
-loadfile(filspc)
-char *filspc;
-{
- FILE *fp;
- char str[NINPUT+2];
-
- if ((fp = fopen(filspc,"r")) != NULL) {
- while (fgets(str, NINPUT, fp) != NULL) {
- str[NINPUT+1] = '\0';
- chop_crlf(str);
- ip = str;
- link_main();
- }
- fclose(fp);
- }
-}
projects / fw / sdcc / blobdiff