2 // RLN - Reboot's Linker for the Atari Jaguar Console System
3 // RLN.C - Application Code
4 // Copyright (C) 199x, Allan K. Pratt, 2011 Reboot & Friends
9 unsigned errflag = 0; // Error flag, goes TRUE on error
10 unsigned waitflag = 0; // Wait for any keypress flag
11 unsigned versflag = 0; // Version banner has been shown flag
12 unsigned aflag = 0; // Absolute linking flag
13 unsigned bflag = 0; // Don't remove mulitply def locals flag
14 unsigned cflag = 0; // COF executable
15 unsigned dflag = 0; // Wait for key after link flag
16 unsigned gflag = 0; // Source level debug include flag
17 unsigned lflag = 0; // Add local symbols to output flag
18 unsigned mflag = 0; // Produce symbol load map flag
19 unsigned oflag = 0; // Output filename specified
20 unsigned rflag = 0; // Segment alignment size flag
21 unsigned sflag = 0; // Output only global symbols
22 unsigned vflag = 0; // Verbose flag
23 unsigned zflag = 0; // Suppress banner flag
24 unsigned pflag, uflag, wflag = 1; // Unimplemented flags
25 unsigned hd = 0; // Index of next file handle to fill
26 unsigned secalign = 7; // Section Alignment (8=phrase)
27 unsigned tbase = 0; // TEXT base address
28 unsigned dbase = 0; // DATA base address
29 unsigned bbase = 0; // BSS base address
30 unsigned textoffset = 0; // COF TEXT segment offset
31 unsigned dataoffset = 0; // COF DATA segment offset
32 unsigned bssoffset = 0; // COF BSS segment offset
33 unsigned displaybanner = 1; // Display version banner
34 unsigned symoffset = 0; // Symbol table offset in output file
35 unsigned dosymi = 0; // Dosym() processing iterator
36 unsigned dbgsymbase = 0; // Debug symbol base address
37 //unsigned symtrunc = 0; // Symbol truncation -i and -ii
38 int noheaderflag = 0; // No header flag for ABS files
39 int hflags; // Value of the arg to -h option
40 int ttype, dtype, btype; // Type flag: 0, -1, -2, -3, -4
41 int tval, dval, bval; // Values of these abs bases
42 int hflag[NHANDLES]; // True for include files
43 int handle[NHANDLES]; // Open file handles
44 int textsize, datasize, bsssize; // Cumulative segment sizes
45 char libdir[FARGSIZE * 3]; // Library directory to search
46 char ofile[FARGSIZE]; // Output file name (.o)
47 char * name[NHANDLES]; // Associated file names
48 char * cmdlnexec = NULL; // Executable name - pointer to ARGV[0]
49 char * hsym1[SYMLEN]; // First symbol for include files
50 char * hsym2[SYMLEN]; // Second symbol for include files
51 struct OFILE * plist = NULL; // Object image list pointer
52 struct OFILE * plast; // Last object image list pointer
53 struct OFILE * olist = NULL; // Pointer to first object file in list
54 struct OFILE * olast; // Pointer to last object file in list
55 char obj_fname[512][FNLEN]; // Object file names
56 unsigned obj_segsize[512][3]; // Object file seg sizes; TEXT,DATA,BSS
57 unsigned obj_index = 0; // Object file index/count
58 struct HREC * htable[NBUCKETS]; // Hash table
59 struct HREC * unresolved = NULL; // Pointer to unresolved hash list
60 struct HREC * lookup(char *); // Hash lookup
61 char * ost; // Output symbol table
62 char * ost_ptr; // Output symbol table; current pointer
63 char * ost_end; // Output symbol table; end pointer
64 char * oststr; // Output string table
65 char * oststr_ptr; // Output string table; current pointer
66 char * oststr_end; // Output string table; end pointer
67 int ost_index = 0; // Index of next ost addition
68 int endian; // Processor endianess
72 // Get a Long Word from Memory
74 unsigned getlong(char * src)
101 // Put a Long Word into Memory
103 void putlong(char * dest, unsigned val)
105 *dest++ = (char)(val >> 24);
106 *dest++ = (char)(val >> 16);
107 *dest++ = (char)(val >> 8);
113 // Get a Word from Memory
115 int getword(char * src)
131 // Put a Word into Memory
133 void putword(char * dest, int val)
135 *dest++ = (char)(val >> 8);
141 // Obtain a File's Size
147 temp = lseek(fd, 0L, SEEK_CUR);
148 hold = lseek(fd, 0L, SEEK_END);
149 lseek(fd, 0L, SEEK_SET);
156 // For this object file, add symbols to the output symbol table after
157 // relocating them. Returns TRUE if ost_lookup returns an error (-1).
159 int dosym(struct OFILE * ofile)
161 char * symptr; // Symbol pointer
162 char * symend; // Symbol end pointer
163 int type; // Symbol type
164 long value; // Symbol value
165 int index; // Symbol index
167 int ssidx; // Segment size table index
168 unsigned tsegoffset; // Cumulative TEXT segment offset
169 unsigned dsegoffset; // Cumulative DATA segment offset
170 unsigned bsegoffset; // Cumulative BSS segment offset
171 struct HREC * hptr; // Hash table pointer for globl/extrn
172 char sym[SYMLEN]; // String for symbol name/hash search
174 // Point to first symbol record in the object file
175 symptr = (ofile->o_image + 32
176 + ofile->o_header.tsize
177 + ofile->o_header.dsize
178 + ofile->o_header.absrel.reloc.tsize
179 + ofile->o_header.absrel.reloc.dsize);
181 // Point to end of symbol record in the object file
182 symend = symptr + ofile->o_header.ssize;
184 // Search through object segment size table to accumulated segment sizes to ensure
185 // the correct offsets are used in the resulting COF file.
186 ssidx = -1; // Initialise segment index
187 tsegoffset = dsegoffset = bsegoffset = 0; // Initialise segment offsets
189 for(j=0; j<(int)obj_index; j++)
190 { // Search for object file name
191 if (!strcmp(ofile->o_name, obj_fname[j]))
193 ssidx = j; // Object file name found
197 tsegoffset += obj_segsize[j][0]; // Accumulate segment sizes
198 dsegoffset += obj_segsize[j][1];
199 bsegoffset += obj_segsize[j][2];
204 printf("dosym() : Cannot get object file segment size : %s\n", ofile->o_name);
208 // Process each record in the symbol table
209 for(; symptr!=symend; symptr+=12)
211 index = getlong(symptr + 0); // Obtain symbol string index
212 type = getlong(symptr + 4); // Obtain symbol type
213 value = getlong(symptr + 8); // Obtain symbol value
215 // Global/External symbols have a pre-processing stage
216 if (type & 0x01000000)
218 // Obtain the string table index for the relocation symbol, look for it in the globals
219 // hash table to obtain information on that symbol. For the hash calculation to work
220 // correctly it must be placed in a 'clean' string before looking it up.
221 memset(sym, 0, SYMLEN);
222 strcpy(sym, symend + index);
227 printf("dosym() : Cannot determine symbol : %s\n", sym);
231 // Search through object segment size table to obtain segment sizes for the object
232 // that has the required external/global as a local symbol. As each object is
233 // interrogated the segment sizes are accumulated to ensure the correct offsets are
234 // used in the resulting COF file. This is effectively 'done again' only as we
235 // are working with a different object file.
236 ssidx = -1; // Initialise segment index
237 tsegoffset = dsegoffset = bsegoffset = 0; // Initialise segment offsets
239 for(j=0; j<(int)obj_index; j++)
240 { // Search for object filename
241 if (!strcmp((const char *)hptr->h_ofile, obj_fname[j]))
243 ssidx = j; // Symbol object filename
247 tsegoffset += obj_segsize[j][0]; // Accumulate segment sizes
248 dsegoffset += obj_segsize[j][1];
249 bsegoffset += obj_segsize[j][2];
254 printf("dosym() : Cannot get object file segment size : %s\n",
259 type = hptr->h_type; // Update type with global type
261 if (type == 0x03000000)
262 type = 0x02000000; // Reset external flag if absolute
264 // If the global/external has a value then update that vaule in accordance with the
265 // segment sizes of the object file it originates from
268 switch (hptr->h_type & 0x0E000000)
270 case 0x02000000: // Absolute value
271 case 0x04000000: // TEXT segment
272 value = hptr->h_value;
274 case 0x06000000: // DATA segment
275 value = hptr->h_value - (hptr->h_ofile->o_header.tsize);
277 case 0x08000000: // BSS segment
278 value = hptr->h_value
279 - (hptr->h_ofile->o_header.tsize + hptr->h_ofile->o_header.dsize);
285 // Process and update the value dependant on whether the symbol is a debug symbol or not
286 if (type & 0xF0000000)
288 // Set the correct debug symbol base address (TEXT segment)
291 for(j=0; (unsigned)j<dosymi; j++)
292 dbgsymbase += obj_segsize[j][0];
294 switch (type & 0xFF000000)
297 value = tval + dbgsymbase;
302 value = tval + dbgsymbase + value;
307 putlong(symptr + 8, value);
310 { // NON-DEBUG SYMBOL
311 // Now make modifications to the symbol value, local or global, based on the segment sizes
312 // of the object file currently being processed.
313 switch (type & T_SEG)
315 case 0x02000000: // Absolute value
317 case T_TEXT: // TEXT segment
318 if (type & 0x01000000)
319 value = tbase + tsegoffset + value;
321 value = tbase + tsegoffset + value;
323 putlong(symptr + 8, value);
325 case T_DATA: // DATA segment
326 if (type & 0x01000000)
327 value = dbase + dsegoffset + value;
329 value = dbase + dsegoffset + (value - ofile->o_header.tsize);
331 putlong(symptr + 8, value);
333 case T_BSS: // BSS segment
334 if (type & 0x01000000)
335 value = bbase + bsegoffset + value;
337 value = bbase + bsegoffset
338 +(value - (ofile->o_header.tsize + ofile->o_header.dsize));
340 putlong(symptr + 8, value);
347 // Add to output symbol table
348 if (lflag || !islocal(type))
350 if (islocal(type) || isglobal(type))
352 if ((index = ost_add(symend + index, type, value)) == -1)
357 // Belongs in OST, but don't look it up yet
363 dosymi++; // Increment dosym() processsing
369 // Free Up Hash Records
374 struct HREC * htemp, * hptr;
376 for(i=0; i<NBUCKETS; i++)
382 htemp = hptr->h_next;
391 // Add all Global and External Symbols to the Output Symbol Table
395 struct HREC * hptr; // Hash record pointer
398 for(i=0; i<NBUCKETS; i++)
400 for(hptr=htable[i]; hptr!=NULL; hptr=hptr->h_next)
402 if (iscommon(hptr->h_type))
404 if (hptr->h_type == 0x03000000)
405 hptr->h_type = 0x02000000; // Absolutes can't be externals
407 if (ost_add(hptr->h_sym, hptr->h_type, hptr->h_value) == -1)
418 // Add a Symbol's Name, Type, and Value to the OST.
419 // Return the Index of the Symbol in OST, or -1 for Error.
421 int ost_add(char * name, int type, long value)
423 int ost_offset_p, ost_offset_e = 0; // OST table offsets for position calcs
424 int slen = 0; // Symbol string length
425 int ostresult; // OST index result
429 // If the OST or OST String Table has not been initialised then do so
432 if ((ost = malloc(OST_BLOCK)) == NULL)
434 printf("OST memory allocation error (stringtable).\n");
438 ost_ptr = ost; // Set OST start pointer
439 ost_end = ost + OST_BLOCK; // Set OST end pointer
441 if ((oststr = malloc(OST_BLOCK)) == NULL)
443 printf("OST memory allocation error (string).\n");
447 putlong(oststr, 0x00000004); // Just null long for now
448 oststr_ptr = oststr + 4; // Skip size of str table long (incl null long)
449 putlong(oststr_ptr, 0x00000000); // Null terminating long
450 oststr_end = oststr + OST_BLOCK;
454 // If next symbol record exceeds current allocation then expand symbol table.
455 ost_offset_p = (ost_ptr - ost);
456 ost_offset_e = (ost_end - ost);
458 if ((ost_ptr + 12) > ost_end)
460 if ((ost = realloc(ost, (unsigned)(ost_end + OST_BLOCK))) == NULL)
462 printf("OST memory reallocation error.\n");
466 ost_ptr = ost + ost_offset_p;
467 ost_end = (ost + ost_offset_e) + OST_BLOCK;
470 ost_offset_p = (oststr_ptr - oststr);
471 ost_offset_e = (oststr_end - oststr);
473 if ((oststr_ptr + (slen+1+4)) > oststr_end)
475 if ((oststr = realloc(oststr, (unsigned)(oststr_end + OST_BLOCK))) == NULL)
477 printf("OSTSTR memory reallocation error.\n");
481 oststr_ptr = oststr + ost_offset_p;
482 oststr_end = (oststr + ost_offset_e) + OST_BLOCK;
486 // If this is a debug symbol and the include debug symbol flag (-g) is not set then do nothing
487 if ((type & 0xF0000000) && !gflag)
493 ostresult = ost_lookup(name); // Get symbol index in OST
494 // If the symbol is in the output symbol table and the bflag is set (don't remove multiply
495 // defined locals) and this is not an external/global symbol *** OR *** the symbol is not
496 // in the output symbol table then add it.
497 if (((ostresult != -1) && bflag && !(type & 0x01000000))
498 || ((ostresult != -1) && gflag && (type & 0xF0000000)) || (ostresult == -1))
500 if ((type & 0xF0000000) == 0x40000000)
501 putlong(ost_ptr, 0x00000000); // Zero string table offset for dbg line
503 putlong(ost_ptr, (oststr_ptr - oststr)); // String table offset of symbol string
505 putlong(ost_ptr + 4, type );
506 putlong(ost_ptr + 8, value);
509 // If the symbol type is anything but a debug line information symbol then write
510 // the symbol string to the string table
511 if ((type & 0xF0000000) != 0x40000000)
513 strcpy(oststr_ptr, name); // Put symbol name in string table
514 *(oststr_ptr + slen) = '\0'; // Add null terminating character
515 oststr_ptr += (slen + 1);
516 putlong(oststr_ptr, 0x00000000); // Null terminating long
517 putlong(oststr, (oststr_ptr - oststr)); // Update size of string table
520 return ost_index++; // Return OST index
524 return 0; // not sure about this as it could affect return indices. needed to stop return error.
529 // Return the Index of a Symbol in the Output Symbol Table
531 int ost_lookup(char * sym)
534 int stro = 4; // Offset in string table
536 for(i=0; i<ost_index; i++)
538 if (!strcmp(oststr + stro, sym))
541 stro += strlen(oststr + stro) + 1;
549 // Add Unresolved Externs to the Output Symbol Table
551 int dounresolved(void)
553 struct HREC * hptr, * htemp; // Hash record pointers
554 hptr = unresolved; // Point to unresolved symbols list
556 // While unresolved list is valid
559 if (ost_add(hptr->h_sym, T_EXT, 0L) == -1)
562 htemp = hptr->h_next; // Temporarily get ptr to next record
563 free(hptr); // Free current record
564 hptr = htemp; // Make next record ptr, current
567 unresolved = NULL; // Zero unresolved record list
573 // Update Object File TEXT and DATA Segments Based on Relocation Records. Take
574 // in an OFILE header and flag (T_TEXT, T_DATA) to process. Return (0) is
575 // successful or non-zero (1) if failed.
577 int reloc_segment(struct OFILE * ofile, int flag)
579 char * symtab; // Start of symbol table
580 char * symbols; // Start of symbols
581 char * sptr; // Start of segment data
582 char * rptr; // Start of segment relocation records
583 unsigned symidx; // Offset to symbol
584 unsigned addr; // Relocation address
585 unsigned rflg; // Relocation flags
586 unsigned olddata; // Old segment data at reloc address
587 unsigned newdata = 0; // New segment data at reloc address
588 unsigned pad; // Temporary to calculate phrase padding
590 char sym[SYMLEN]; // String for symbol name/hash search
591 int ssidx; // Segment size table index
592 unsigned glblreloc; // Global relocation flag
593 unsigned absreloc; // Absolute relocation flag
594 unsigned relreloc; // Relative relocation flag
595 unsigned swcond; // Switch statement condition
596 unsigned relocsize; // Relocation record size
598 // If there is no TEXT relocation data for the selected object file segment
599 // then update the COF TEXT segment offset allowing for the phrase padding
600 if ((flag == T_TEXT) && !ofile->o_header.absrel.reloc.tsize)
602 // TEXT segment size plus padding
603 pad = ((ofile->o_header.tsize+secalign) & ~secalign);
604 textoffset += (ofile->o_header.tsize + (pad - ofile->o_header.tsize));
607 printf("reloc_segment(%s, TEXT) : No Relocation Data\n", ofile->o_name);
612 // If there is no DATA relocation data for the selected object file segment
613 // then update the COF DATA and BSS segment offsets allowing for the phrase
615 if ((flag == T_DATA) && !ofile->o_header.absrel.reloc.dsize)
617 // DATA segment size plus padding
618 pad = ((ofile->o_header.dsize + secalign) & ~secalign);
619 dataoffset += (ofile->o_header.dsize + (pad - ofile->o_header.dsize));
620 // BSS segment size plus padding
621 pad = ((ofile->o_header.bsize + secalign) & ~secalign);
622 bssoffset += (ofile->o_header.bsize + (pad - ofile->o_header.bsize));
625 printf("reloc_segment(%s, DATA) : No Relocation Data\n", ofile->o_name);
630 // Verbose mode information
633 printf("reloc_segment(%s, %s) : Processing Relocation Data\n",
634 ofile->o_name, flag == T_DATA ? "DATA" : "TEXT");
637 // Obtain pointer to start of symbol table
638 symtab = (ofile->o_image + 32 + ofile->o_header.tsize + ofile->o_header.dsize
639 + ofile->o_header.absrel.reloc.tsize + ofile->o_header.absrel.reloc.dsize);
641 // Obtain pointer to start of symbols
642 symbols = symtab + ofile->o_header.ssize;
644 // Obtain pointer to start of TEXT segment
645 sptr = ofile->o_image + 32;
647 // Obtain pointer to start of TEXT relocation records
648 rptr = sptr + (ofile->o_header.tsize + ofile->o_header.dsize);
650 relocsize = ofile->o_header.absrel.reloc.tsize;
652 // Update pointers if DATA relocation records are being processed
655 sptr += ofile->o_header.tsize; // Start of DATA segment
656 rptr += ofile->o_header.absrel.reloc.tsize; // Start of DATA relocation records
657 relocsize = ofile->o_header.absrel.reloc.dsize;
660 // Process each relocation record for the TEXT segment
661 for(i=0; i<(int)relocsize; i+=8)
663 // Obtain both the relocation address and the relocation flags from the
665 addr = getlong(rptr);
666 rflg = getlong(rptr + 4);
667 glblreloc = (rflg & 0x00000010 ? 1 : 0); // Set global relocation flag
668 absreloc = (rflg & 0x00000040 ? 1 : 0); // Set absolute relocation flag
669 relreloc = (rflg & 0x000000A0 ? 1 : 0); // Set relative relocation flag
671 // Additional processing required for global relocations
674 // Obtain the string table index for the relocation symbol, look
675 // for it in the globals hash table to obtain information on that
676 // symbol. For the hash calculation to work correctly it must be
677 // placed in a 'clean' string before looking it up.
678 symidx = getlong(symtab + ((rflg >> 8) * 12));
679 memset(sym, 0, SYMLEN);
680 strcpy(sym, symbols + symidx);
681 olddata = newdata = 0; // Initialise old and new segment data
682 ssidx = ost_lookup(sym);
683 newdata = getlong(ost + ((ssidx - 1) * 12) + 8);
686 // Obtain the existing long word segment data and flip words if the
687 // relocation flags indicate it relates to a RISC MOVEI instruction
688 olddata = getlong(sptr + addr);
691 olddata = _SWAPWORD(olddata);
693 // Process record dependant on segment it relates to; TEXT, DATA or
694 // BSS. Construct a new relocated segment long word based on the
695 // required segment base address, the segment data offset in the
696 // resulting COF file and the offsets from the incoming object file.
697 //swcond = glblreloc ? ((hptr->h_type & 0x0E000000) >> 16) : (rflg & 0xFFFFFF00);
698 swcond = (rflg & 0xFFFFFF00);
704 case 0x00000200: // Absolute Value
706 case 0x00000400: // TEXT segment relocation record
707 //AARRRGGGGHHHHH! does the else belong to the 1st 'if' or the 2nd?
708 // can we trust the indention to tell the truth here???
709 // Braces were not here, so if something breaks, try pairing the else to the 1st 'if'...
713 newdata = tbase + textoffset + olddata;
715 newdata = tbase + dataoffset + olddata;
719 case 0x00000600: // DATA segment relocation record
721 newdata = dbase + dataoffset + (olddata - ofile->o_header.tsize);
724 case 0x00000800: // BSS segment relocation record
726 newdata = bbase + bssoffset
727 + (olddata - (ofile->o_header.tsize + ofile->o_header.dsize));
738 // Set absolute (long) or relative (word) address of symbol
741 // Flip the new long word segment data if the relocation record
742 // indicated a RISC MOVEI instruction and place the resulting data
743 // back in the COF segment
745 newdata = _SWAPWORD(newdata);
747 putlong(sptr + addr, newdata);
751 putword(sptr + addr, newdata - tbase - addr - ofile->o_tbase);
754 // Shamus: Let's output some info to aid in debugging this crap
757 printf("reloc_segment(): %s, $%08X: $%08X => $%08X\n", sym, addr, olddata, getlong(sptr + addr));
760 rptr += 8; // Point to the next relocation record
763 // Update the COF segment offset allowing for the phrase padding.
766 // TEXT segment plus padding
767 pad = ((ofile->o_header.tsize + secalign) & ~secalign);
768 textoffset += (ofile->o_header.tsize + (pad - ofile->o_header.tsize));
772 // DATA segment plus padding
773 pad = ((ofile->o_header.dsize + secalign) & ~secalign);
774 dataoffset += (ofile->o_header.dsize + (pad - ofile->o_header.dsize));
775 // BSS segment plus padding
776 pad = ((ofile->o_header.bsize + secalign) & ~secalign);
777 bssoffset += (ofile->o_header.bsize + (pad - ofile->o_header.bsize));
780 // Return value, should always be zero
786 // Add a path character to the end of string 's' if it doesn't already end with
787 // one. The last occurrance of '/' or '\\' in the string is assumed to be the
790 void pathadd(char * s)
792 // And hope to God that there's enough space in the buffer...
797 if (*s == '/' || *s == '\\')
814 // Try to open "name", "name.o", "${libdir}name", "${libdir}name.o". Return the
815 // handle of the file successfully opened. p_name is updated to point to a
816 // malloc()'ed string which is the name which actually got opened. p_name will
817 // return unchanged if the file can't be found.
819 int tryopen(char ** p_name)
821 char * name = *p_name; // Filename
822 char * tmpbuf, * lastdot; // Buffer and 'dot' pointers
823 int fd, hasdot; // File descriptor and 'has dot' flag
825 // Note that libdir will be an empty string if there is none specified
826 if ((tmpbuf = malloc((long)strlen(name) + strlen(libdir) + 3)) == NULL)
828 printf("tryopen() : out of memory\n");
832 strcpy(tmpbuf, name);
833 hasdot = ((lastdot = strrchr(tmpbuf, '.')) > strrchr(tmpbuf, '/'))
834 && (lastdot > strrchr(tmpbuf, '\\'));
836 if ((fd = open(tmpbuf, _OPEN_FLAGS)) >= 0)
837 goto ok; // Try to open file as passed first
841 strcat(tmpbuf, ".o"); // Try to open file with '.o' added
843 if ((fd = open(tmpbuf, _OPEN_FLAGS)) >= 0)
847 // Try the libdir only if the name isn't already anchored
848 if (*name != '/' && *name != '\\' && !strchr(name, ':'))
850 strcpy(tmpbuf,libdir);
851 // Add a trailing path char if there isn't one already
853 strcat(tmpbuf, name);
855 if ((fd = open(tmpbuf, _OPEN_FLAGS)) >= 0)
860 strcat(tmpbuf, ".o");
862 if ((fd = open(tmpbuf, _OPEN_FLAGS)) >= 0)
867 return -1; // Couldn't open file at all
869 // What more Atari label use - sigh!!!
871 if ((tmpbuf = realloc(tmpbuf, (long)strlen(tmpbuf) + 1)) == NULL)
873 printf("tryopen() : out of memory\n");
878 return fd; // Return file descriptor
883 // Archive File Use, Needs to be Removed
885 void put_name(struct OFILE * p)
887 int flag = *(p->o_arname);
888 printf("%s%s%s", flag ? p->o_arname : "", flag ? ":" : "", p->o_name);
893 // Collect file names and handles in a buffer so there is less disk activity.
894 // Call dofile with flag FALSE for normal object files and archives.
895 // Call it with flag TRUE and a symbol name for include files (-i).
897 int dofile(char * fname, int flag, char * sym)
899 int fd; // File descriptor
900 int temp; // Temporary storage
902 // Verbose information
905 printf("dofile() : `%s' %s", fname, flag ? "INCLUDE" : "NORMAL");
908 printf(" symbol %s", sym);
913 // Reached maximum file handles
916 if (flush_handles()) return 1;
919 // Attempt to open input file
920 if ((fd = tryopen(&fname)) < 0)
922 printf("Cannot find input module %s\n", fname);
926 // The file is open; save its info in the handle and name arrays
928 name[hd] = fname; // This is the name from tryopen()
934 temp = strlen(sym); // Get symbol length
936 // 100 chars is max length of a symbol
943 // Malloc enough space for two symbols, then build the second one. Second one may be one
944 // character longer than first
945 if ((hsym1[hd] = malloc((long)temp + 1)) == NULL
946 || (hsym2[hd] = malloc((long)temp + 2)) == NULL)
948 printf("dofile() : out of memory for include-file symbols\n");
952 strcpy(hsym1[hd], sym);
953 strcpy(hsym2[hd], sym);
959 printf("Last char of %s is already 'x': choose another name\n", sym);
967 hsym2[hd][temp] = 'x';
968 hsym2[hd][temp+1] = '\0';
972 hd++; // Increment next handle index
973 return 0; // No problems
978 // Pad TEXT or DATA Segment to the Requested Boundary
980 int segmentpad(FILE * fd, long segsize, int value)
982 long padsize; // Number of pad bytes needed
983 int i; // Good 'ol iterator
984 char padarray[32]; // Array of padding bytes
985 char * padptr; // Pointer to array
987 // Determine the number of padding bytes that are needed
988 padsize = (segsize + secalign) & ~secalign;
989 padsize = padsize - segsize;
991 // Fill pad array if padding is required
998 putword(padptr, value);
1002 symoffset += padsize;
1004 if (fwrite(padarray, padsize, 1, fd) != 1) // Write padding bytes
1008 return 0; // All done
1013 // Write the Output File
1015 int write_ofile(struct OHEADER * header)
1017 FILE * fd; // File descriptor
1018 unsigned osize; // Object segment size
1019 struct OFILE * otemp; // Object file pointer
1020 int i, j; // Iterators
1021 char himage[0x168]; // Header image (COF = 0xA8)
1022 unsigned tsoff, dsoff, bsoff; // Segment offset values
1023 unsigned index, type, value; // Symbol table index, type and value
1024 short abstype; // ABS symbol type
1025 char symbol[14]; // Symbol record for ABS files
1026 int slen; // Symbol string length
1028 symoffset = 0; // Initialise symbol offset
1030 // Add correct output extension if none
1031 if (strchr(ofile, '.') == NULL)
1034 strcat(ofile, ".cof"); // COF files
1035 else if (aflag && !cflag)
1036 strcat(ofile, ".abs"); // ABS files
1038 strcat(ofile, ".o"); // Object files (partial linking etc)
1041 fd = fopen(ofile, "wb"); // Attempt to open output file
1045 printf("Can't open output file %s\n", ofile); // Error opening output file
1049 // Build the output file header
1050 // Absolute (COF) header
1053 tsoff = dsoff = bsoff = 0xA8; // Initialises segment offsets
1055 // Process each object file segment size to obtain a cumulative segment size for both
1056 // the TEXT and DATA segments
1057 for(i=0; i<(int)obj_index; i++)
1059 dsoff += obj_segsize[i][0]; // Adding TEXT segment sizes
1060 bsoff += obj_segsize[i][0] + obj_segsize[i][1]; // Adding TEXT and DATA segment sizes
1063 // Currently this only builds a COF absolute file. Conditionals and additional code will
1064 // need to be added for ABS and partial linking.
1066 // Build the COF_HDR
1067 putword(himage + 0, 0x0150 ); // Magic Number (0x0150)
1068 putword(himage + 2, 0x0003 ); // Sections Number (3)
1069 putlong(himage + 4, 0x00000000 ); // Date (0L)
1070 putlong(himage + 8, dsoff + header->dsize); // Offset to Symbols Section
1071 putlong(himage + 12, ost_index); // Number of Symbols
1072 putword(himage + 16, 0x001C ); // Size of RUN_HDR (0x1C)
1073 putword(himage + 18, 0x0003 ); // Executable Flags (3)
1075 // Build the RUN_HDR
1076 putlong(himage + 20, 0x00000107 ); // Magic/vstamp
1077 putlong(himage + 24, header->tsize ); // TEXT size in bytes
1078 putlong(himage + 28, header->dsize ); // DATA size in bytes
1079 putlong(himage + 32, header->bsize ); // BSS size in bytes
1080 putlong(himage + 36, tbase ); // Start of executable, normally @TEXT
1081 putlong(himage + 40, tbase ); // @TEXT
1082 putlong(himage + 44, dbase ); // @DATA
1084 // Build the TEXT SEC_HDR
1085 putlong(himage + 48, 0x2E746578 );
1086 putlong(himage + 52, 0x74000000 ); // ".text"
1087 putlong(himage + 56, tbase ); // TEXT START
1088 putlong(himage + 60, tbase ); // TEXT START
1089 putlong(himage + 64, header->tsize ); // TEXT size in bytes
1090 putlong(himage + 68, tsoff ); // Offset to section data in file
1091 putlong(himage + 72, 0x00000000 ); // Offset to section reloc in file (0L)
1092 putlong(himage + 76, 0x00000000 ); // Offset to debug lines structures (0L)
1093 putlong(himage + 80, 0x00000000 ); // Nreloc/nlnno (0L)
1094 putlong(himage + 84, 0x00000020 ); // SEC_FLAGS: STYP_TEXT
1096 // Build the DATA SEC_HDR
1097 putlong(himage + 88, 0x2E646174 );
1098 putlong(himage + 92, 0x61000000 ); // ".data"
1099 putlong(himage + 96, dbase ); // DATA START
1100 putlong(himage + 100, dbase ); // DATA START
1101 putlong(himage + 104, header->dsize ); // DATA size in bytes
1102 putlong(himage + 108, dsoff ); // Offset to section data in file
1103 putlong(himage + 112, 0x00000000 ); // Offset to section reloc in file (0L)
1104 putlong(himage + 116, 0x00000000 ); // Offset to debugging lines structures (0L)
1105 putlong(himage + 120, 0x00000000 ); // Nreloc/nlnno (0L)
1106 putlong(himage + 124, 0x00000040 ); // SEC_FLAGS: STYP_DATA
1108 // Build the BSS SEC_HDR
1109 putlong(himage + 128, 0x2E627373 );
1110 putlong(himage + 132, 0x00000000 ); // ".bss"
1111 putlong(himage + 136, bbase ); // BSS START
1112 putlong(himage + 140, bbase ); // BSS START
1113 putlong(himage + 144, header->bsize ); // BSS size in bytes
1114 putlong(himage + 148, bsoff ); // Offset to section data in file
1115 putlong(himage + 152, 0x00000000 ); // Offset to section reloc in file (0L)
1116 putlong(himage + 156, 0x00000000 ); // Offset to debugging lines structures (0L)
1117 putlong(himage + 160, 0x00000000 ); // Nreloc/nlnno (0L)
1118 putlong(himage + 164, 0x00000080 ); // SEC_FLAGS: STYP_BSS
1120 symoffset = 168; // Update symbol offset
1122 // Absolute (ABS) header
1125 // Build the ABS header
1126 putword(himage + 0, 0x601B ); // Magic Number (0x601B)
1127 putlong(himage + 2, header->tsize ); // TEXT segment size
1128 putlong(himage + 6, header->dsize ); // DATA segment size
1129 putlong(himage + 10, header->bsize ); // BSS segment size
1130 putlong(himage + 14, ost_index * 14 ); // Symbol table size (?)
1131 putlong(himage + 18, 0x00000000 ); //
1132 putlong(himage + 22, tbase ); // TEXT base address
1133 putword(himage + 26, 0xFFFF ); // Flags (?)
1134 putlong(himage + 28, dbase ); // DATA base address
1135 putlong(himage + 32, bbase ); // BSS base address
1137 symoffset = 36; // Update symbol offset
1140 // Write the header, but not if noheaderflag
1141 // Absolute (ABS) header
1145 if (fwrite(himage, 36, 1, fd) != 1)
1148 // Absolute (COF) header
1151 if (fwrite(himage, 168, 1, fd) != 1)
1155 // Write the TEXT segment of each object file
1156 for(otemp=olist; otemp!=NULL; otemp=otemp->o_next)
1158 osize = otemp->o_header.tsize;
1160 // Write only if segment has size
1164 printf("Writing TEXT Segment of %s\n", otemp->o_name);
1166 if (fwrite(otemp->o_image + 32, osize, 1, fd) != 1)
1169 // Pad to required alignment boundary
1170 if (segmentpad(fd, osize, 0x0000))
1177 // Write the DATA segment of each object file
1178 for(otemp = olist; otemp != NULL; otemp = otemp->o_next)
1180 osize = otemp->o_header.dsize;
1182 // Write only if the segment has size
1186 printf("Writing DATA Segment of %s\n", otemp->o_name);
1188 if (fwrite((otemp->o_image + 32 + otemp->o_header.tsize), osize, 1, fd) != 1)
1191 // Pad to required alignment boundary
1192 if (segmentpad(fd, osize, 0))
1201 // Write the symbols table and string table
1202 // Absolute (COF) symbol/string table
1207 if (fwrite(ost, (ost_ptr - ost), 1, fd) != 1) goto werror;
1208 if (fwrite(oststr, (oststr_ptr - oststr), 1, fd) != 1) goto werror;
1211 // Absolute (ABS) symbol/string table
1214 // The symbol and string table have been created as part of the dosym() function and the
1215 // output symbol and string tables are in COF format. For an ABS file we need to process
1216 // through this to create the 14 character long combined symbol and string table.
1217 // Format of symbol table in ABS: AAAAAAAATTVVVV, where (A)=STRING, (T)=TYPE & (V)=VALUE
1219 for(i=0; i<ost_index; i++)
1221 memset(symbol, 0, 14); // Initialise symbol record
1222 abstype = 0; // Initialise ABS symbol type
1223 slen = 0; // Initialise symbol string length
1224 index = getlong(ost + (i * 12)); // Get symbol index
1225 type = getlong((ost + (i * 12)) + 4); // Get symbol type
1227 if (type & 0xF0000000)
1228 continue; // Not doing debug symbols
1230 value = getlong((ost + (i * 12)) + 8); // Get symbol value
1231 slen = strlen(oststr + index);
1233 // Get symbol string (maximum 8 chars)
1237 *(symbol + j) = *(oststr + index + j);
1241 for(j=0; j<slen; j++)
1242 *(symbol + j) = *(oststr + index + j);
1245 // Modify to ABS symbol type
1248 case 0x02000000: abstype = (short)ABST_DEFINED; break;
1249 case 0x04000000: abstype = (short)ABST_DEFINED | ABST_TEXT; break;
1250 case 0x05000000: abstype = (short)ABST_DEFINED | ABST_GLOBAL | ABST_TEXT; break;
1251 case 0x06000000: abstype = (short)ABST_DEFINED | ABST_DATA; break;
1252 case 0x07000000: abstype = (short)ABST_DEFINED | ABST_GLOBAL | ABST_DATA; break;
1253 case 0x08000000: abstype = (short)ABST_DEFINED | ABST_BSS; break;
1254 case 0x09000000: abstype = (short)ABST_DEFINED | ABST_GLOBAL | ABST_BSS; break;
1256 printf("write_ofile: abs, cannot determine symbol type\n");
1261 putword(symbol + 8, abstype); // Write back new ABS type
1262 putlong(symbol + 10, value); // Write back value
1264 if (fwrite(symbol, 14, 1, fd) != 1) goto werror; // Write symbol record
1272 printf("Close error on output file %s\n",ofile);
1278 werror: // OMG! Why did Atari use these :)
1279 printf("Write error on output file %s\n", ofile);
1280 fclose(fd); // Try to close output file anyway
1286 // Display the Symbol Load Map
1288 int write_map(struct OHEADER * header)
1290 unsigned i, o; // Inner and outer loop iterators
1291 unsigned c; // Column number
1292 unsigned index; // Symbol string index
1293 unsigned type; // Symbol type
1294 unsigned value; // Symbol value
1295 char * symbol; // Symbol string value
1298 return 0; // Return if no symbols to map
1300 printf("LOAD MAP\n\n");
1302 // Outer loop for each of the symbol areas to map out;
1303 // 0 = NON-RELOCATABLE SYMBOLS
1304 // 1 = TEXT-SEGMENT RELOCATABLE SYMBOLS
1305 // 2 = DATA-SEGMENT RELOCATABLE SYMBOLS
1306 // 3 = BSS-SEGMENT RELOCATABLE SYMBOLS
1309 // Display the correct map header for the symbols being processed
1312 case 0: printf("NON-RELOCATABLE SYMBOLS\n\n"); break;
1313 case 1: printf("TEXT-SEGMENT RELOCATABLE SYMBOLS\n\n"); break;
1314 case 2: printf("DATA-SEGMENT RELOCATABLE SYMBOLS\n\n"); break;
1315 case 3: printf("BSS-SEGMENT RELOCATABLE SYMBOLS\n\n"); break;
1318 c = 0; // Initialise column number
1320 // Inner loop to process each record in the symbol table
1321 for(i=0; i<(unsigned)ost_index; i++)
1323 index = getlong(ost + (i * 12)); // Get symbol string index
1324 type = getlong(ost + (i * 12) + 4); // Get symbol type
1325 value = getlong(ost + (i * 12) + 8); // Get symbol value
1326 symbol = oststr + index; // Get symbol string
1328 // Display only three columns
1335 // If local symbols not included and the type is local then go to next symbol record
1336 if (!lflag & !(type & 0x01000000))
1339 // Output each symbol to the display, dependant on type
1342 case 0: // Non-relocatable symbols
1343 if (type == 0x02000000 || type == 0x03000000)
1345 printf("%-8s %c %08X ", symbol, (type & 0x01000000) ? 'G' : 'L', value);
1350 case 1: // TEXT segment relocatable symbols
1351 if (type == 0x04000000 || type == 0x05000000)
1353 printf("%-8s %c %08X ", symbol, (type & 0x01000000) ? 'G' : 'L', value);
1358 case 2: // DATA segment relocatble symbols
1359 if (type == 0x06000000 || type == 0x07000000)
1361 printf("%-8s %c %08X ", symbol, (type & 0x01000000) ? 'G' : 'L', value);
1366 case 3: // BSS segment relocatable symbols
1367 if (type == 0x08000000 || type == 0x09000000)
1369 printf("%-8s %c %08X ", symbol, (type & 0x01000000) ? 'G' : 'L', value);
1380 return 0; // All done
1385 // Convert ASCII to Hexadecimal
1387 //int atolx(char * string, long * value)
1388 int atolx(char * string, int * value)
1392 while (isxdigit(*string))
1394 if (isdigit(*string))
1396 *value = (*value << 4) + (*string++ - '0');
1400 if (isupper(*string))
1401 *string = tolower(*string);
1403 *value = (*value << 4) + ((*string++ - 'a') + 10);
1407 if (*string != '\0')
1409 printf("Invalid hexadecimal value");
1418 // Stuff the (long) value of a string into the value argument. RETURNS TRUE if
1419 // the string doesn't parse. Parses only as a hex string.
1421 //int getval(char * string, long * value)
1422 int getval(char * string, int * value)
1424 return atolx(string, value);
1429 // Create one big .o file from the images already in memory, returning a
1430 // pointer to an OHEADER. Note that the oheader is just the header for the
1431 // output (plus some other information). The text, data, and fixups are all
1432 // still in the ofile images hanging off the global `olist'.
1434 struct OHEADER * make_ofile()
1436 unsigned tptr, dptr, bptr; // Bases in runtime model
1437 int ret = 0; // Return value
1438 struct OFILE * otemp, * oprev, * ohold; // Object file list pointers
1439 struct OHEADER * header; // Output header pointer
1441 textsize = datasize = bsssize = 0; // Initialise cumulative segment sizes
1443 // For each object file, accumulate the sizes of the segments but remove those
1444 // object files which are unused
1445 oprev = NULL; // Init previous obj file list ptr
1446 otemp = olist; // Set temp pointer to object file list
1448 while (otemp != NULL)
1451 if (!(otemp->o_flags & O_ARCHIVE))
1453 if ((otemp->o_flags & O_USED) == 0)
1457 printf("Unused object file ");
1459 printf(" discarded.\n");
1464 olist = otemp->o_next;
1468 oprev -> o_next = otemp->o_next;
1472 free(ohold->o_image);
1477 // Increment total of segment sizes ensuring requested alignment
1478 textsize += (otemp->o_header.tsize + secalign) & ~secalign;
1479 datasize += (otemp->o_header.dsize + secalign) & ~secalign;
1480 bsssize += (otemp->o_header.bsize + secalign) & ~secalign;
1485 otemp = otemp->o_next; // Go to next object file list pointer
1488 // Update base addresses and create symbols _TEXT_E, _DATA_E and _BSS_E
1490 ost_add("_TEXT_E", 0x05000000, tval + textsize);
1494 // DATA follows TEXT
1495 dbase = tval + textsize;
1496 ost_add("_DATA_E", 0x07000000, tval + textsize + datasize);
1501 bbase = tval + textsize + datasize;
1502 ost_add("_BSS_E", 0x09000000, tval + textsize + datasize + bsssize);
1506 // BSS is independant of DATA
1508 ost_add("_BSS_E", 0x09000000, bval + bsssize);
1513 // DATA is independant of TEXT
1515 ost_add("_DATA_E", 0x07000000, dval + datasize);
1520 bbase = dval + datasize;
1521 ost_add("_BSS_E", 0x09000000, dval + datasize + bsssize);
1525 // BSS is independant of DATA
1527 ost_add("_BSS_E", 0x09000000, bval + bsssize);
1531 // Place each unresolved symbol in the output symbol table
1535 tptr = 0; // Initialise base addresses
1539 // For each file, relocate its symbols and add them to the output symbol table
1543 while (otemp != NULL)
1545 otemp->o_tbase = tptr;
1547 // Do rest only for non-ARCHIVE markers
1548 if (!(otemp->o_flags & O_ARCHIVE))
1550 otemp->o_dbase = dptr;
1551 otemp->o_bbase = bptr;
1552 tptr += (otemp->o_header.tsize + secalign) & ~secalign;
1553 dptr += (otemp->o_header.dsize + secalign) & ~secalign;
1554 bptr += (otemp->o_header.bsize + secalign) & ~secalign;
1557 // For each symbol, (conditionally) add it to the ost
1558 // For ARCHIVE markers, this adds the symbol for the file & returns
1562 if (otemp->o_flags & O_ARCHIVE)
1564 // Now that the archive is marked, remove it from list
1566 olist = otemp->o_next;
1568 oprev->o_next = otemp->o_next;
1572 if (ohold->o_image) free(ohold->o_image);
1580 otemp = otemp->o_next;
1583 // Places all the externs, globals etc into the output symbol table
1584 if (docommon() == -1)
1587 // Create a new output file header
1588 if ((header = new_oheader()) == NULL)
1590 printf("make_ofile: out of memory!\n");
1594 // Fill in the output header. Does not match the actual output but values
1595 // used as reference
1596 header->magic = 0x0150; // COF magic number
1597 header->tsize = textsize; // TEXT segment size
1598 header->dsize = datasize; // DATA segment size
1599 header->bsize = bsssize; // BSS segment size
1600 header->ssize = (ost_ptr - ost); // Symbol table size
1601 header->ostbase = ost; // Output symbol table base address
1603 // For each object file, relocate its TEXT and DATA segments. OR the result
1604 // into ret so all files get moved (and errors reported) before returning
1605 // with the error condition
1606 for(otemp=olist; otemp!=NULL; otemp=otemp->o_next)
1608 if (!(otemp->o_flags & O_ARCHIVE))
1610 ret |= reloc_segment(otemp, T_TEXT); // TEXT segment relocations
1611 ret |= reloc_segment(otemp, T_DATA); // DATA segment relocations
1615 hash_free(); // Done with global symbol hash tables
1617 return (ret ? (unsigned)NULL : header);
1622 // Add Symbol to Hash List
1624 int add_to_hlist(struct HREC ** hptr, char * sym, struct OFILE * ofile, long value, int type)
1626 struct HREC * htemp; // Temporary hash record pointer
1629 // Attempt to allocate new hash record
1630 if ((htemp = new_hrec()) == NULL)
1632 printf("Out of memory\n");
1636 for(i=0; i<SYMLEN; i++)
1637 htemp->h_sym[i] = '\0';
1639 strcpy(htemp->h_sym, sym); // Populate hash record
1640 htemp->h_ofile = ofile;
1641 htemp->h_value = value;
1642 htemp->h_type = type;
1644 htemp->h_next = *hptr; // Update hash record pointers
1652 // Add Symbol to the Unresolved Symbols Hash Table
1654 add_unresolved(char * sym, struct OFILE * ofile)
1657 printf("add_unresolved(%s,%s)\n", sym, ofile->o_name);
1659 return add_to_hlist(&unresolved, sym, ofile, 0L, 0);
1664 // Generate and Return Hash Value
1666 int dohash(char * s)
1668 int i = (s[0]+s[1]+s[2]+s[3]+s[4]+s[5]+s[6]+s[7] +s[8]+s[9]+s[10]+s[11]+s[12]+s[13]+s[14]) % NBUCKETS;
1674 // Lookup a Symbol in the Hash Table
1676 struct HREC * lookup(char * sym)
1678 struct HREC * hptr = htable[dohash(sym)]; // Hash index to record based on sym
1679 char symbol[SYMLEN]; // Temporary symbol storage
1681 memset(symbol, 0, SYMLEN); // Clean string for comparison
1682 strcpy(symbol, sym);
1684 while (hptr != NULL)
1686 if (symcmp(symbol, hptr->h_sym))
1689 hptr = hptr->h_next; // Return hash pointer if found
1692 return NULL; // Not found in hash table
1697 // Add Symbol to the Hash Table
1699 int hash_add(char * sym, long type, long value, struct OFILE * ofile)
1702 int flag = !iscommon(type);
1706 printf("hash_add(%s,%s,%lx,", sym, ofile->o_name,value);
1707 printf("%x,%s)\n", (unsigned int)type, (flag ? "GLOBAL" : "COMMON"));
1710 if ((hptr = lookup(sym)) == NULL)
1712 return add_to_hlist(&htable[dohash(sym)], sym, ofile, value, type);
1716 if (iscommon(type) && !iscommon(hptr->h_type))
1718 // Mismatch: global came first; warn and keep the global one
1721 printf("Warning: %s: global from ",sym);
1722 put_name(hptr->h_ofile);
1723 printf(" used, common from ");
1725 printf(" discarded.\n");
1728 putword(sym + 8, ABST_EXTERN);
1729 putlong(sym + 10, 0L);
1731 else if (iscommon(hptr->h_type) && !iscommon(type))
1733 // Mismatch: common came first; warn and keep the global one
1736 printf("Warning: %s: global from ", sym);
1738 printf(" used, common from ");
1739 put_name(hptr->h_ofile);
1740 printf(" discarded.\n");
1743 hptr->h_type = type;
1744 hptr->h_ofile = ofile;
1745 hptr->h_value = value;
1748 { // They're both global
1749 // Global exported by another ofile; warn and make this one extern
1752 printf("Duplicate symbol %s: ", sym);
1753 put_name(hptr->h_ofile);
1756 printf(" discarded\n");
1759 putword(sym + 8, ABST_EXTERN);
1762 { // They're both common
1763 if (hptr->h_value < value)
1765 hptr->h_value = value;
1766 hptr->h_ofile = ofile;
1775 // Add the imported symbols from this file to unresolved, and the global and
1776 // common symbols to the exported hash table.
1778 // Change old-style commons (type == T_EXTERN, value != 0) to new-style ones
1779 // (type == (T_GLOBAL | T_EXTERN)).
1781 int add_symbols(struct OFILE * Ofile)
1783 long nsymbols; // Number of symbols in object file
1784 char * ptr; // Object data base pointer
1785 char * sfix; // Symbol fixup table pointer
1786 char * sstr; // Symbol string table pointer
1787 long index; // String index
1788 long type; // Symbol type
1789 long value; // Symbol value
1790 struct HREC * hptr; // Hash record pointer
1791 char symbol[SYMLEN];
1794 printf("Add symbols for file %s\n", Ofile->o_name);
1796 ptr = Ofile->o_image + 32 // Get base pointer, start of sym fixups
1797 + Ofile->o_header.tsize
1798 + Ofile->o_header.dsize
1799 + Ofile->o_header.absrel.reloc.tsize
1800 + Ofile->o_header.absrel.reloc.dsize;
1801 sfix = ptr; // Set symbol fixup pointer
1802 sstr = sfix + Ofile->o_header.ssize; // Set symbol table pointer
1803 nsymbols = Ofile->o_header.ssize / 12; // Obtain number of symbols
1807 index = getlong(sfix); // Get symbol string index
1808 type = getlong(sfix + 4); // Get symbol type
1809 value = getlong(sfix + 8); // Get symbol value
1810 memset(symbol, 0, SYMLEN);
1811 strcpy(symbol, sstr + index);
1813 // If this is a global/external
1818 // Then add to hash table
1819 if (hash_add(symbol, type, value, Ofile))
1821 return 1; // Error if addition failed
1826 // If value is zero and in hash table
1827 if ((hptr = lookup(symbol)) != NULL)
1829 hptr->h_ofile->o_flags |= O_USED; // Mark symbol as used
1831 // Otherwise add to unresolved list
1832 else if (add_unresolved(symbol, Ofile))
1834 return 1; // Error if addition failed
1839 sfix += 12; // Increment symbol fixup pointer
1840 nsymbols--; // Decrement num of symbols to process
1843 return 0; // Success loading symbols
1848 // Process Object File for Symbols
1850 int doobj(char * fname, char * ptr, char * aname, int flags)
1852 struct OFILE * Ofile; // Object record pointer
1853 char * temp; // Temporary data pointer
1855 // Allocate memory for object record ptr
1856 if ((Ofile = new_ofile()) == NULL)
1858 printf("Out of memory processing %s\n",fname);
1862 // Starting after all pathnames, etc., copy .o file name to Ofile
1863 temp = path_tail(fname);
1865 // Check filename length
1866 if (strlen(temp) > FNLEN - 1)
1868 printf("File name too long: %s\n", temp);
1872 // Check archive name length
1873 if (strlen(aname) > FNLEN - 1)
1875 printf("Archive name too long: %s\n", aname);
1879 strcpy(Ofile->o_name, temp); // Store filename
1880 strcpy(Ofile->o_arname, aname); // Store archive name
1882 Ofile->o_next = NULL; // Initialise object record information
1886 Ofile->o_flags = flags;
1887 Ofile->o_image = ptr;
1889 // Don't do anything if this is just an ARCHIVE marker, just add the file to the olist
1890 if (!(flags & O_ARCHIVE))
1892 Ofile->o_header.magic = getlong(ptr);
1893 Ofile->o_header.tsize = getlong(ptr+4);
1894 Ofile->o_header.dsize = getlong(ptr+8);
1895 Ofile->o_header.bsize = getlong(ptr+12);
1896 Ofile->o_header.ssize = getlong(ptr+16);
1897 Ofile->o_header.absrel.reloc.tsize = getlong(ptr+24);
1898 Ofile->o_header.absrel.reloc.dsize = getlong(ptr+28);
1900 // Round BSS off to alignment boundary
1901 Ofile->o_header.bsize = (Ofile->o_header.bsize + secalign) & ~secalign;
1903 if (Ofile->o_header.dsize & 7)
1905 printf("Warning: data segment size of ");
1907 printf(" is not a phrase multiple\n");
1910 // Check for odd segment sizes
1911 if ((Ofile->o_header.tsize & 1) || (Ofile->o_header.dsize & 1)
1912 || (Ofile->o_header.bsize & 1))
1914 printf("Error: odd-sized segment in ");
1916 printf("; link aborted.\n");
1920 if (add_symbols(Ofile))
1924 // Add this file to the olist
1928 olast->o_next = Ofile;
1936 // Remove Elements from Unresolved List which are Resolvable
1940 struct HREC * uptr; // Unresolved hash record pointer
1941 struct HREC * prev = NULL; // Previous hash record pointer
1942 struct HREC * htemp; // Temporary hash record pointer
1943 struct OFILE * ptemp; // Temporary object file record pointer
1945 // Process object file list
1946 while (plist != NULL)
1948 if (doobj(plist->o_name, plist->o_image, plist->o_arname, plist->o_flags))
1952 plist = plist->o_next;
1956 // Process unresolved list
1957 for(uptr=unresolved; uptr!=NULL; )
1960 printf("lookup(%s) => ",uptr->h_sym);
1962 if ((htemp = lookup(uptr->h_sym)) != NULL)
1965 printf(" %s in %s\n", isglobal(htemp->h_type) ? "global" : "common", htemp->h_ofile->o_name);
1967 htemp->h_ofile->o_flags |= O_USED;
1971 unresolved = uptr->h_next;
1977 prev->h_next = uptr->h_next;
1979 uptr = prev->h_next;
1986 uptr = uptr->h_next;
1995 // Extract Filename from Path
1997 char * path_tail(char * name)
1999 char * temp = max(strrchr(name,'/'), max(strrchr(name,':'), strrchr(name, 92)));
2009 // Add Input File to Processing List
2011 int pladd(char * ptr, char * fname)
2015 plist = new_ofile(); // First time object record allocation
2016 plast = plist; // Update last object record pointer
2020 plast->o_next = new_ofile(); // Next object record allocation
2021 plast = plast->o_next; // Update last object record pointer
2026 printf("Out of memory.\n"); // Error if memory allocation fails
2030 if (strlen(path_tail(fname)) > FNLEN-1)
2031 { // Error on excessive filename length
2032 printf("File name too long: %s (sorry!)\n",fname);
2036 strcpy(plast->o_name, path_tail(fname)); // Store filename, not path
2037 *plast->o_arname = 0; // No archive name for this file
2038 plast->o_image = ptr; // Store data pointer
2039 plast->o_flags = O_USED; // File is used
2040 plast->o_next = NULL; // Initialise next record pointer
2042 return 0; // Return without errors
2047 // Process in Binary Include Files and Add them to the Processing List. This
2048 // routine takes in the binary file and creates an 'object' file in memory.
2049 // Sym1/Sym2 point to the start and end of data.
2051 // Image size for include files is:
2052 // Header ....... 32 bytes
2053 // Data ......... dsize
2054 // Sym Fixups ... 2 * 12 bytes
2055 // Symbol Size .. 4 bytes (Value to include symbols and terminating null)
2056 // Symbols ...... (strlen(sym1) + 1) + (strlen(sym2) + 1)
2057 // Terminate .... 4 bytes (0x00000000)
2059 int doinclude(char * fname, int handle, char * sym1, char * sym2, int segment)
2061 long fsize, dsize, size; // File, DATA segment and image sizes
2062 char * ptr, * sptr; // Data pointers
2064 int sym1len = 0; // Symbol 1 length
2065 int sym2len = 0; // Symbol 2 length
2066 unsigned symtype = 0;
2068 fsize = FSIZE(handle); // Get size of include file
2069 dsize = (fsize+secalign) & ~secalign; // Round up to a alignment boundary
2071 sym1len = strlen(sym1) + 1; // Get sym1 length + null termination
2072 sym2len = strlen(sym2) + 1; // Get sym2 length + null termination
2074 size = 32 + dsize + 24 + 4 + sym1len + sym2len + 4;
2076 // Use calloc so the header & fixups initialize to zero
2077 // Allocate object image memory
2078 if ((ptr = calloc(size, 1L)) == NULL)
2080 printf("Out of memory while including %s\n", fname);
2085 // Read in binary data
2086 if (read(handle, ptr+32, fsize) != fsize)
2088 printf("File read error on %s\n", fname);
2094 close(handle); // Close file
2096 strcpy(obj_fname[obj_index], path_tail(fname));
2098 // Build this image's dummy header
2099 putlong(ptr, 0x00000107); // Magic number
2103 putlong(ptr+4, dsize); // Text size
2104 putlong(ptr+8, 0L); // Data size
2105 symtype = 0x05000000;
2106 obj_segsize[obj_index][0] = dsize;
2107 obj_segsize[obj_index][1] = 0;
2108 obj_segsize[obj_index][2] = 0;
2112 putlong(ptr+4, 0L); // Text size
2113 putlong(ptr+8, dsize); // Data size
2114 symtype = 0x07000000;
2115 obj_segsize[obj_index][0] = 0;
2116 obj_segsize[obj_index][1] = dsize;
2117 obj_segsize[obj_index][2] = 0;
2120 obj_index++; // Increment object count
2122 putlong(ptr+12, 0L); // BSS size
2123 putlong(ptr+16, 24); // Symbol table size
2124 putlong(ptr+20, 0L); // Entry point
2125 putlong(ptr+24, 0L); // TEXT relocation size
2126 putlong(ptr+28, 0L); // DATA relocation size
2128 sptr = ptr + 32 + dsize; // Set sptr to symbol table location
2130 putlong(sptr, 4L); // String offset of symbol1
2131 putlong(sptr+4, symtype); // Symbol type
2132 putlong(sptr+8, 0x00000000); // Symbol has no value (START)
2133 putlong(sptr+12, 4L + (sym2len-1)); // String offset of symbol2
2134 putlong(sptr+16, symtype); // Symbol type
2135 putlong(sptr+20, dsize); // Symbol is data size (END)
2137 sptr = ptr + 32 + dsize + 24; // Set sptr to symbol table size loc
2139 putlong(sptr, sym1len + 4L); // Size of symbol table
2141 sptr = ptr + 32 + dsize + 24 + 4; // Set sptr to symbol table location
2143 for(i=0; i<(sym1len-1); i++) // Write symbol1 to string table
2146 sptr += (sym1len-1); // Step past symbol string
2147 *sptr = '\0'; // Terminate symbol string
2148 sptr += 1; // Step past termination
2150 for(i=0; i<(sym2len-1); i++) // Write symbol2 to string table
2153 sptr += (sym2len-1); // Step past symbol string
2154 *sptr = '\0'; // Terminate symbol string
2155 sptr += 1; // Step past termination
2157 putlong(sptr, 0L); // Terminating long for object file
2159 return pladd(ptr, fname);
2164 // Takes a file name, gets in its image, puts it on plist. The image may
2165 // already be in memory: If so, the ptr arg is non-null. If so, the file is
2166 // already closed. Note that the file is already open (from dofile()). RETURNS
2167 // a pointer to the OFILE structure for this file, so you can diddle its flags
2168 // (dofile sets O_USED for files on the command line).
2170 int doobject(char * fname, int fd, char * ptr)
2172 long size; // File size
2176 size = FSIZE(fd); // Get size of input object file
2178 // Allocate memory for file data
2179 if ((ptr = malloc(size)) == NULL)
2181 printf("Out of memory while processing %s\n", fname);
2182 close(fd); // Close and error
2186 // Read in file data
2187 if (read(fd, ptr, size) != size)
2189 printf("File read error on %s\n", fname);
2190 close(fd); // Close, free memory and error
2195 strcpy(obj_fname[obj_index], path_tail(fname)); // SCPCD : get the name of the file instead of all pathname
2196 obj_segsize[obj_index][0] = (getlong(ptr + 4) + secalign) & ~secalign;
2197 obj_segsize[obj_index][1] = (getlong(ptr + 8) + secalign) & ~secalign;
2198 obj_segsize[obj_index][2] = (getlong(ptr + 12) + secalign) & ~secalign;
2201 close(fd); // Close file
2204 // Now add this image to the list of pending ofiles (plist)
2205 // This routine is shared by doinclude after it builds the image
2206 return pladd(ptr, fname);
2211 // Process In Outstanding Object Files
2213 int flush_handles(void)
2216 char magic[4]; // Magic header number
2219 // Process all handles
2220 for(i=0; i<(int)hd; i++)
2222 // Verbose mode information
2225 printf("Read file %s%s\n", name[i], hflag[i] ? " (include)" : "");
2229 { // Attempt to read file magic number
2231 if (read(handle[i],magic,4) != 4)
2233 printf("Error reading file %s\n", name[i]);
2234 close(handle[i]); // Close file and error
2238 lseek(handle[i], 0L, 0); // Reset to start of input file
2239 // test = getlong(magic); printf("Magic Number is 0x%08X\n", test);
2241 if (getlong(magic) == 0x00000107)
2242 { // Look for SMAC/MAC object files
2243 if (doobject(name[i], handle[i], 0L)) // Process input object file
2248 printf("%s is not a supported object file\n", name[i]);
2249 close(handle[i]); // Close file and error
2256 // If hflag[i] is 1, include this in the data segment; if 2, put in in text segment
2257 if (doinclude(name[i], handle[i], hsym1[i], hsym2[i], hflag[i] - 1))
2262 // Free include, symbol & object handles
2263 for(i=0; i<(int)hd; i++)
2274 hd = 0; // Reset next handle indicator
2280 // Load newargv with Pointers to Arguments Found in the Buffer
2282 int parse(char * buf, char * newargv[])
2287 printf("begin parsing\n");
2291 while (*buf && strchr(",\t\n\r\14 ", *buf))
2295 if (*buf == '\0' || *buf == 26)
2299 printf("No commands in command file\n");
2308 /* test for comment */
2311 /* found a comment; skip to next \n and start over */
2312 while (*buf && *buf != '\n')
2320 printf("Too many arguments in command file\n");
2326 while (!strchr(",\t\n\r\14 ", *buf))
2328 if (*buf == '\0' || *buf == 26)
2330 printf("Finished parsing %d args\n", i);
2340 printf("argv[%d] = \"%s\"\n", i, newargv[i]);
2348 // Process in a Link Command File
2350 int docmdfile(char * fname)
2352 int fd; // File descriptor
2353 unsigned size; // Command file size
2354 char * ptr; // Pointer
2355 int newargc; // New argument count
2356 char * (*newargv)[]; // New argument value array
2358 // Verbose information
2360 printf("docmdfile(%s)\n", fname);
2362 // Allocate memory for new argument values
2363 newargv = malloc((long)(sizeof(char *) * MAXARGS));
2367 printf("Out of memory.\n");
2371 // Attempt to open and read in the command file
2374 if ((fd = open(fname, _OPEN_FLAGS)) < 0)
2376 printf("Cannot open command file %s.\n", fname);
2382 if ((ptr = malloc(size + 1)) == NULL)
2384 printf("Out of memory.\n");
2389 if (read(fd, ptr, size) != (int)size)
2391 printf("Read error on command file %s.\n", fname);
2396 *(ptr + size) = 0; // Null terminate the buffer
2401 printf("No command filename specified\n");
2405 // Parse the command file
2406 if ((newargc = parse(ptr, *newargv)) == -1)
2411 // Process the inputted flags
2412 if (doargs(newargc, *newargv))
2414 printf("docmdfile: doargs returns TRUE\n");
2426 // Take an Argument List and Parse the Command Line
2428 int doargs(int argc, char * argv[])
2430 int i = 1; // Iterator
2431 int c; // Command line character
2432 char * ifile, * isym; // File name and symbol name for -i
2435 { // Parse through option switches & files
2436 if (argv[i][0] == '-')
2437 { // Process command line switches
2440 printf("Illegal option argument: %s\n\n", argv[i]);
2445 c = argv[i++][1]; // Get next character in command line
2448 { // Process command line switch
2449 case '?': // Display usage information
2456 case 'A': // Set absolute linking on
2462 printf("Not enough arguments to -a\n");
2466 aflag = 1; // Set abs link flag
2467 // Segment order is TEXT, DATA, BSS
2468 // Text segment can be 'r', 'x' or a value
2471 if ((*argv[i] == 'r' || *argv[i] == 'R') && !argv[i][1])
2473 ttype = -1; // TEXT segment is relocatable
2475 else if ((*argv[i] == 'x' || *argv[i] == 'X'))
2477 printf("Error in text-segment address: cannot be contiguous\n");
2480 else if ((ttype = 0), getval(argv[i], &tval))
2482 printf("Error in text-segment address: %s is not 'r', 'x' or an address.", argv[i]);
2487 // Data segment can be 'r', 'x' or a value
2490 if ((*argv[i] == 'r' || *argv[i] == 'R') && !argv[i][1])
2492 dtype = -1; // DATA segment is relocatable
2494 else if ((*argv[i] == 'x' || *argv[i] == 'X'))
2496 dtype = -2; // DATA follows TEXT
2498 else if ((dtype = 0), getval(argv[i],&dval))
2500 printf("Error in data-segment address: %s is not 'r', 'x' or an address.", argv[i]);
2507 // BSS segment can be 'r', 'x' or a value
2508 if ((*argv[i] == 'r' || *argv[i] == 'R') && !argv[i][1])
2510 btype = -1; // BSS segment is relocatable
2512 else if ((*argv[i] == 'x' || *argv[i] == 'X'))
2514 btype = -3; // BSS follows DATA
2516 else if ((btype = 0), getval(argv[i],&bval))
2518 printf("Error in bss-segment address: %s is not 'r', 'x[td]', or an address.", argv[i]);
2525 case 'B': // Don't remove muliply defined locals
2532 case 'C': // Process a command file
2535 printf("Not enough arguments to -c\n");
2539 if (docmdfile(argv[i++]))
2546 case 'D': // Wait for "return" before exiting
2554 case 'E': // Output COFF (absolute only)
2558 case 'G': // Output source level debugging
2559 printf("\'g\' flag not currently implemented\n");
2562 if (gflag) warn('g', 1);
2567 case 'I': // Include binary file
2570 printf("Not enough arguments to -i\n");
2577 if ((argv[i-3][2] == 'i') || (argv[i-3][2] == 'I'))
2578 { // handle -ii (No truncation)
2580 printf("warning: (-ii) COFF format output not specified\n");
2583 { // handle -i (Truncation)
2584 if (strlen(isym) > 7)
2588 // Place include files in the DATA segment only
2589 if (dofile(ifile, DSTSEG_D, isym))
2594 case 'L': // Add local symbols
2601 case 'M': // Produce load symbol map
2608 case 'N': // Output no header to .abs file
2615 case 'O': // Specify an output file
2623 printf("No output filename following -o switch\n");
2627 if (strlen(argv[i]) > FARGSIZE - 5)
2629 printf("Output file name too long (sorry!)\n");
2633 strcpy(ofile, argv[i++]);
2636 case 'R': // Section alignment size
2642 switch (argv[i-1][2])
2644 case 'w': case 'W': secalign = 1; break; // Word alignment
2645 case 'l': case 'L': secalign = 3; break; // Long alignment
2646 case 'p': case 'P': secalign = 7; break; // Phrase alignment
2647 case 'd': case 'D': secalign = 15; break; // Double phrase alignment
2648 case 'q': case 'Q': secalign = 31; break; // Quad phrase alignment
2649 default: secalign = 7; break; // Default phrase alignment
2654 case 'S': // Output only global symbols
2661 case 'V': // Verbose information
2662 if (!vflag && !versflag)
2670 case 'Z': // Suppress banner flag
2677 printf("unknown option argument `%c'\n", c);
2682 { // Not a switch, then process as a file
2683 if (dofile(argv[i++], 0, NULL))
2689 if (!oflag && vflag)
2691 strcpy(ofile, "output");
2692 printf("Output file is %s[.ext]\n", ofile);
2696 printf("Output file is %s\n", ofile);
2701 return 0; // No problems encountered
2706 // Display Version Information
2708 void display_version(void)
2710 if (displaybanner)// && vflag)
2712 printf("\nReboot's Linker for Atari Jaguar\n");
2713 printf("Copyright (c) 199x Allan K. Pratt, 2011 Reboot\n");
2714 printf("V%i.%i.%i %s (%s)\n\n", MAJOR, MINOR, PATCH, __DATE__, PLATFORM);
2720 // Display Command Line Help
2722 void display_help(void)
2725 printf(" %s [-options] file(s)\n", cmdlnexec);
2727 printf("Options:\n");
2728 printf(" -? or -h display usage information\n");
2729 printf(" -a <text> <data> <bss> output absolute file\n");
2730 printf(" hex value: segment address\n");
2731 printf(" r: relocatable segment\n");
2732 printf(" x: contiguous segment\n");
2733 printf(" -b don't remove multiply defined local labels\n");
2734 printf(" -c <fname> add contents of <fname> to command line\n");
2735 printf(" -d wait for key after link\n");
2736 printf(" -e output COF absolute file\n");
2737 printf(" -g output source-level debugging\n");
2738 printf(" -i <fname> <label> incbin <fname> and set <label>\n");
2739 printf(" -l add local symbols\n");
2740 printf(" -m produce load symbols map\n");
2741 printf(" -n output no file header to .abs file\n");
2742 printf(" -o <fname> set output name\n");
2743 printf(" -r<size> section alignment size\n");
2744 printf(" w: word (2 bytes)\n");
2745 printf(" l: long (4 bytes)\n");
2746 printf(" p: phrase (8 bytes, default alignment)\n");
2747 printf(" d: double phrase (16 bytes)\n");
2748 printf(" q: quad phrase (32 bytes)\n");
2749 printf(" -s output only global symbols\n");
2750 printf(" -v set verbose mode\n");
2751 printf(" -z suppress banner\n");
2763 // Display link status if verbose mode
2765 printf("Link %s.\n", errflag ? "aborted" : "complete");
2767 // Wait for return key if requested
2770 printf("\nPress the <return> key to continue. ");
2771 fgets(tempbuf, 128, stdin);
2779 // Determine Processor Endianess
2781 int get_endianess(void)
2784 char * p = (char *)&i;
2794 // Application Code Starts Here
2796 int main(int argc, char * argv[])
2798 char * s = NULL; // String pointer for "getenv"
2799 struct HREC * utemp; // Temporary hash record pointer
2800 struct OHEADER * header; // Pointer to output header structure
2802 endian = get_endianess(); // Get processor endianess
2803 cmdlnexec = argv[0]; // Obtain executable name
2804 s = getenv("RLNPATH");
2806 if (s) // Attempt to obtain env variable
2807 strcpy(libdir, s); // Store it if found
2809 // Parse the command line
2810 if (doargs(argc, argv))
2816 if (!zflag && !vflag)
2818 display_version(); // Display version information
2819 versflag = 1; // We've dumped the version banner
2822 // Process in specified files/objects
2823 if (flush_handles())
2829 // Remove elements from unresolved list
2836 // Check that there is something to link
2839 // printf("No object files to link.\n\n");
2845 // Report unresolved externals
2846 if (unresolved != NULL)
2848 printf("UNRESOLVED SYMBOLS\n");
2850 // Don't list them if two -u's or more
2855 while (utemp != NULL)
2857 printf("\t%s (",utemp->h_sym);
2858 put_name(utemp->h_ofile);
2860 utemp = utemp->h_next;
2871 // Make one output file from input objs
2872 if ((header = make_ofile()) == NULL)
2881 printf("TO DO:Partial linking\n");
2884 // Relocatable linking
2887 printf("TO DO:Relocatable linking\n");
2895 printf("Absolute linking ");
2904 printf("Header magic is 0x%04X\n", (unsigned int)header->magic);
2906 if (write_ofile(header))
2910 if (mflag) // Display the loaded symbols map
2911 if (write_map(header))
2914 // Display segment size summary
2918 printf("+---------+----------+----------+----------+\n");
2919 printf("| Segment | TEXT | DATA | BSS |\n");
2920 printf("| Sizes |----------+----------+----------|\n");
2921 printf("| (Hex) | %8X | %8X | %8X |\n", (unsigned int)header->tsize, (unsigned int)header->dsize, (unsigned int)header->bsize);
2922 printf("+---------+----------+----------+----------+\n\n");
2925 free(header); // Free allocated memory
2926 rln_exit(); // Perform application exit