Initial commit.
authorJames Hammons <jlhamm@acm.org>
Mon, 26 Dec 2011 17:38:55 +0000 (17:38 +0000)
committerJames Hammons <jlhamm@acm.org>
Mon, 26 Dec 2011 17:38:55 +0000 (17:38 +0000)
makefile [new file with mode: 0644]
rln.c [new file with mode: 0644]
rln.h [new file with mode: 0644]

diff --git a/makefile b/makefile
new file mode 100644 (file)
index 0000000..d49541a
--- /dev/null
+++ b/makefile
@@ -0,0 +1,22 @@
+rm=/bin/rm -f 
+CC= cc 
+PROGNAME= rln 
+LIBS= 
+
+CFLAGS= -g -I. -D__GCCUNIX__
+
+SRCS = rln.c 
+
+OBJS = rln.o
+
+.c.o: 
+       $(rm) $@ 
+       $(CC) $(CFLAGS) -c $*.c 
+
+all: $(PROGNAME) 
+
+$(PROGNAME) : $(OBJS) 
+       $(CC) $(CFLAGS) -o $(PROGNAME) $(OBJS) $(LIBS) 
+
+clean: 
+       $(rm) $(OBJS) $(PROGNAME) core *~ 
diff --git a/rln.c b/rln.c
new file mode 100644 (file)
index 0000000..f1d0b9b
--- /dev/null
+++ b/rln.c
@@ -0,0 +1,2547 @@
+///////////////////////////////////////////////////////////////////////////////
+// RLN - Reboot's Linker for the Atari Jaguar Console System
+// RLN.C - Application Code
+// Copyright (C) 199x, Allan K. Pratt, 2011 Reboot & Friends
+
+#include "rln.h"
+
+unsigned errflag = 0;                  // Error flag, goes TRUE on error
+unsigned waitflag = 0;                  // Wait for any keypress flag
+unsigned versflag = 0;                  // Version banner has been shown flag
+unsigned aflag = 0;                     // Absolute linking flag
+unsigned bflag = 0;                     // Don't remove mulitply def locals flag
+unsigned cflag = 0;                     // COF executable
+unsigned dflag = 0;                     // Wait for key after link flag
+unsigned gflag = 0;                     // Source level debug include flag
+unsigned lflag = 0;                     // Add local symbols to output flag
+unsigned mflag = 0;                     // Produce symbol load map flag
+unsigned oflag = 0;                     // Output filename specified
+unsigned rflag = 0;                     // Segment alignment size flag
+unsigned sflag = 0;                     // Output only global symbols
+unsigned vflag = 0;                     // Verbose flag
+unsigned zflag = 0;                     // Suppress banner flag
+unsigned pflag, uflag, wflag;           // Unimplemented flags
+unsigned hd = 0;                        // Index of next file handle to fill 
+unsigned secalign = 7;                  // Section Alignment (8=phrase)
+unsigned tbase = 0;                     // TEXT base address
+unsigned dbase = 0;                     // DATA base address
+unsigned bbase = 0;                     // BSS base address
+unsigned textoffset = 0;                // COF TEXT segment offset
+unsigned dataoffset = 0;                // COF DATA segment offset
+unsigned bssoffset = 0;                 // COF BSS segment offset
+unsigned displaybanner = 1;             // Display version banner
+unsigned symoffset = 0;                 // Symbol table offset in output file
+unsigned dosymi = 0;                    // Dosym() processing iterator
+unsigned dbgsymbase = 0;                // Debug symbol base address
+//unsigned symtrunc = 0;                // Symbol truncation -i and -ii
+int noheaderflag = 0;                   // No header flag for ABS files
+int hflags;                             // Value of the arg to -h option 
+int ttype, dtype, btype;                // Type flag: 0, -1, -2, -3, -4 
+int tval, dval, bval;                   // Values of these abs bases 
+int hflag[NHANDLES];                    // True for include files
+int handle[NHANDLES];                   // Open file handles 
+int textsize, datasize, bsssize;        // Cumulative segment sizes 
+char libdir[FARGSIZE * 3];              // Library directory to search
+char ofile[FARGSIZE];                   // Output file name (.o) 
+char * name[NHANDLES];                  // Associated file names 
+char * cmdlnexec = NULL;                // Executable name - pointer to ARGV[0]
+char * hsym1[SYMLEN];                   // First symbol for include files 
+char * hsym2[SYMLEN];                   // Second symbol for include files 
+struct OFILE * plist = NULL;            // Object image list pointer
+struct OFILE * plast;                   // Last object image list pointer
+struct OFILE * olist = NULL;            // Pointer to first object file in list
+struct OFILE * olast;                   // Pointer to last object file in list
+char obj_fname[512][FNLEN];             // Object file names
+unsigned obj_segsize[512][3];           // Object file seg sizes; TEXT,DATA,BSS
+unsigned obj_index = 0;                 // Object file index/count   
+struct HREC * htable[NBUCKETS];         // Hash table 
+struct HREC * unresolved = NULL;        // Pointer to unresolved hash list
+struct HREC * lookup(char *);           // Hash lookup
+char * ost;                             // Output symbol table
+char * ost_ptr;                         // Output symbol table; current pointer
+char * ost_end;                         // Output symbol table; end pointer
+char * oststr;                          // Output string table
+char * oststr_ptr;                      // Output string table; current pointer
+char * oststr_end;                      // Output string table; end pointer
+int ost_index = 0;                      // Index of next ost addition
+int endian;                             // Processor endianess
+
+
+//
+// --- Get a Long Word from Memory --------------------------------------------
+//
+unsigned getlong(char * src)
+{
+       unsigned temp;
+       char * out;
+               
+       out = (char *)&temp;
+
+       if (endian == 1)
+       {
+               *out++ = src[0];
+               *out++ = src[1];
+               *out++ = src[2];
+               *out = src[3];
+       }
+       else
+       {
+               *out++ = src[3];
+               *out++ = src[2];
+               *out++ = src[1];
+               *out = src[0];
+       }
+
+       return temp;
+}
+
+
+//
+// --- Put a Long Word into Memory --------------------------------------------
+//
+void putlong(char * dest, unsigned val)
+{
+       *dest++ = (char)(val >> 24);
+       *dest++ = (char)(val >> 16);
+       *dest++ = (char)(val >> 8);
+       *dest = (char)val;
+}
+
+
+//
+// --- Get a Word from Memory -------------------------------------------------
+//
+int getword(char * src)
+{
+       unsigned temp;
+       char * out;
+
+       out = (char *)&temp;
+       *out++ = src[1];
+       *out++ = src[0];
+       *out++ = 0;
+       *out = 0;
+
+       return temp;
+}
+
+
+//
+// --- Put a Word into Memory -------------------------------------------------
+//
+void putword(char * dest, int val)
+{
+       *dest++ = (char)(val >> 8);
+       *dest = (char)val;
+}
+
+
+//
+// --- Obtain a File's Size ---------------------------------------------------
+//
+long FSIZE(int fd)
+{
+       unsigned temp, hold;
+
+       temp = lseek(fd, 0L, SEEK_CUR);
+       hold = lseek(fd, 0L, SEEK_END);
+       lseek(fd, 0L, SEEK_SET);
+
+       return hold;
+}
+
+
+// ----------------------------------------------------------------------------
+// For this object file, add symbols to the output symbol table after
+// relocating them. Returns TRUE if ost_lookup returns an error (-1).
+// ----------------------------------------------------------------------------
+int dosym(struct OFILE * ofile)
+{
+   char * symptr;                                            // Symbol pointer
+   char * symend;                                            // Symbol end pointer
+   int type;                                                // Symbol type
+   long value;                                              // Symbol value
+   int index;                                               // Symbol index
+   int j;                                                   // Iterator
+   int ssidx;                                               // Segment size table index
+   unsigned tsegoffset;                                     // Cumulative TEXT segment offset
+   unsigned dsegoffset;                                     // Cumulative DATA segment offset
+   unsigned bsegoffset;                                     // Cumulative BSS segment offset
+   struct HREC * hptr;                                       // Hash table pointer for globl/extrn
+   char sym[SYMLEN];                                        // String for symbol name/hash search
+
+   // Point to first symbol record in the object file
+   symptr = (ofile->o_image + 32 +
+             ofile->o_header.tsize +
+             ofile->o_header.dsize +
+             ofile->o_header.absrel.reloc.tsize +
+             ofile->o_header.absrel.reloc.dsize);
+
+   // Point to end of symbol record in the object file
+   symend = symptr + ofile->o_header.ssize;                 
+
+   // Search through object segment size table to accumulated segment sizes to ensure 
+   // the correct offsets are used in the resulting COF file.
+   ssidx = -1;                                              // Initialise segment index
+   tsegoffset = dsegoffset = bsegoffset = 0;                // Initialise segment offsets
+
+   for(j=0; j<(int)obj_index; j++)
+   {                    // Search for object file name
+      if (!strcmp(ofile->o_name, obj_fname[j]))
+         {
+         ssidx = j;                                         // Object file name found
+         break;
+      }
+
+      tsegoffset += obj_segsize[j][0];                      // Accumulate segment sizes
+      dsegoffset += obj_segsize[j][1];
+      bsegoffset += obj_segsize[j][2];
+   }
+
+   if (ssidx == -1)
+   {
+      printf("dosym() : Cannot get object file segment size : %s\n", ofile->o_name);
+      return(1);
+   }   
+
+   // Process each record in the symbol table
+   for(; symptr!=symend ; symptr+=12)
+   {
+      index = getlong(symptr + 0);                          // Obtain symbol string index
+      type  = getlong(symptr + 4);                          // Obtain symbol type
+          value = getlong(symptr + 8);                          // Obtain symbol value
+
+      // Global/External symbols have a pre-processing stage
+      if (type & 0x01000000)
+         {
+         // Obtain the string table index for the relocation symbol, look for it in the globals
+         // hash table to obtain information on that symbol. For the hash calculation to work
+         // correctly it must be placed in a 'clean' string before looking it up.
+         memset(sym, 0, SYMLEN);          
+         strcpy(sym, symend + index);
+         hptr = lookup(sym);
+
+                if (hptr == NULL)
+                {
+            printf("dosym() : Cannot determine symbol : %s\n", sym);
+            return 1;
+         }
+
+         // Search through object segment size table to obtain segment sizes for the object 
+         // that has the required external/global as a local symbol. As each object is
+         // interrogated the segment sizes are accumulated to ensure the correct offsets are
+         // used in the resulting COF file.  This is effectively 'done again' only as we 
+         // are working with a different object file.
+         ssidx = -1;                                        // Initialise segment index
+         tsegoffset = dsegoffset = bsegoffset = 0;          // Initialise segment offsets
+
+         for(j=0; j<(int)obj_index; j++)
+                {              // Search for object filename
+            if (!strcmp((const char *)hptr->h_ofile, obj_fname[j]))
+                       {
+               ssidx = j;                                   // Symbol object filename
+               break;
+            }
+
+            tsegoffset += obj_segsize[j][0];                // Accumulate segment sizes
+            dsegoffset += obj_segsize[j][1];
+            bsegoffset += obj_segsize[j][2];
+         }
+         
+         if (ssidx == -1)
+                {
+            printf("dosym() : Cannot get object file segment size : %s\n", 
+                   ofile->o_name);
+            return 1;
+         }   
+
+         type = hptr->h_type;                               // Update type with global type
+
+         if (type == 0x03000000) 
+            type = 0x02000000;          // Reset external flag if absolute
+
+         // If the global/external has a value then update that vaule in accordance with the
+         // segment sizes of the object file it originates from
+         if (hptr->h_value)
+                {
+            switch (hptr->h_type & 0x0E000000)
+                       {
+               case 0x02000000:                             // Absolute value
+               case 0x04000000:                             // TEXT segment
+                  value = hptr->h_value;
+                  break;
+               case 0x06000000:                             // DATA segment
+                  value = hptr->h_value - (hptr->h_ofile->o_header.tsize);
+                  break;
+               case 0x08000000:                             // BSS segment
+                  value = hptr->h_value - 
+                          (hptr->h_ofile->o_header.tsize + hptr->h_ofile->o_header.dsize);
+               break;
+            }
+         }
+      }
+
+      // Process and update the value dependant on whether the symbol is a debug symbol or not
+      if (type & 0xF0000000)
+         {                               // DEBUG SYMBOL
+         // Set the correct debug symbol base address (TEXT segment)
+         dbgsymbase = 0;
+
+                for(j=0; (unsigned)j<dosymi; j++) 
+            dbgsymbase += obj_segsize[j][0];
+
+                switch (type & 0xFF000000)
+                {
+            case 0x64000000: 
+               value = tval + dbgsymbase; 
+               break;
+            case 0x44000000:
+            case 0x46000000:
+            case 0x48000000:
+               value = tval + dbgsymbase + value;
+            default: 
+               break;
+         }
+
+         putlong(symptr + 8, value);
+      }
+      else
+         {                                              // NON-DEBUG SYMBOL
+         // Now make modifications to the symbol value, local or global, based on the segment sizes
+         // of the object file currently being processed.
+         switch (type & T_SEG)
+                {
+            case 0x02000000:                                // Absolute value
+               break;
+            case T_TEXT:                                    // TEXT segment
+               if(type & 0x01000000) value = tbase + tsegoffset + value;
+               else value = tbase + tsegoffset + value;
+               putlong(symptr + 8, value);
+               break;
+            case T_DATA:                                    // DATA segment
+               if(type & 0x01000000) value = dbase + dsegoffset + value;
+               else value = dbase + dsegoffset + (value - ofile->o_header.tsize);
+               putlong(symptr + 8, value);
+               break;
+            case T_BSS:                                     // BSS segment
+               if(type & 0x01000000) value = bbase + bsegoffset + value;
+               else value = bbase + bsegoffset + 
+                           (value - (ofile->o_header.tsize + ofile->o_header.dsize));
+               putlong(symptr + 8, value);
+               break;
+            default:
+               break;
+         }
+      } 
+
+      // Add to output symbol table
+      if (lflag || !islocal(type))
+         {
+         if (islocal(type) || isglobal(type))
+                {
+            if ((index = ost_add(symend + index, type, value)) == -1) 
+               return(1);
+         }
+         else
+                {
+            // Belongs in OST, but don't look it up yet
+            index = -1;        
+         }
+      }
+   }
+
+   dosymi++;                                                // Increment dosym() processsing
+   return 0;
+}
+
+
+//
+// --- Free Up Hash Records ---------------------------------------------------
+//
+void hash_free(void)
+{
+   int i;
+   struct HREC *htemp, *hptr;
+    
+   for(i = 0; i < NBUCKETS; i++) {
+      hptr = htable[i];
+      while(hptr) {
+         htemp = hptr->h_next;
+         free(hptr);
+         hptr = htemp;
+      }
+   }
+}
+
+// 
+// --- Add all Global and External Symbols to the Output Symbol Table ------------------------------
+// 
+
+long docommon(void) {
+   struct HREC *hptr;                                       // Hash record pointer
+   int i;                                                   // Iterator
+
+   for(i = 0; i < NBUCKETS; i++) {
+      for(hptr = htable[i]; hptr != NULL; hptr = hptr->h_next) {
+         if(iscommon(hptr->h_type)) {
+            if(hptr->h_type == 0x03000000)
+               hptr->h_type = 0x02000000;                   // Absolutes can't be externals
+            if(ost_add(hptr->h_sym, hptr->h_type, hptr->h_value) == -1) {
+               return(-1);
+            }
+         } 
+      }
+   }
+
+   return(0);
+}
+
+// -------------------------------------------------------------------------------------------------
+// Add a Symbol's Name, Type, and Value to the OST. 
+// Return the Index of the Symbol in OST, or -1 for Error.
+// -------------------------------------------------------------------------------------------------
+
+int ost_add(char *name, int type, long value) {
+   int ost_offset_p, ost_offset_e = 0;                      // OST table offsets for position calcs
+   int slen = 0;                                            // Symbol string length
+   int ostresult;                                           // OST index result
+
+   slen = strlen(name);
+
+   // If the OST or OST String Table has not been initialised then do so
+   if(ost_index == 0) {
+      if((ost = malloc(OST_BLOCK)) == NULL) {
+         printf("OST memory allocation error (stringtable).\n");
+         return(-1);
+      }
+      ost_ptr = ost;                                        // Set OST start pointer
+      ost_end = ost + OST_BLOCK;                            // Set OST end pointer
+      if((oststr = malloc(OST_BLOCK)) == NULL) {
+         printf("OST memory allocation error (string).\n");
+         return(-1);
+      }
+      putlong(oststr, 0x00000004);                          // Just null long for now
+      oststr_ptr = oststr + 4;                              // Skip size of str table long (incl null long)
+      putlong(oststr_ptr, 0x00000000);                      // Null terminating long
+      oststr_end = oststr + OST_BLOCK;
+   } else {
+      // If next symbol record exceeds current allocation then expand symbol table.
+      ost_offset_p = (ost_ptr - ost);
+      ost_offset_e = (ost_end - ost);
+      if((ost_ptr + 12) > ost_end) {                  // 3 x int (12)
+         if((ost = realloc(ost, (unsigned)(ost_end + OST_BLOCK))) == NULL) {
+            printf("OST memory reallocation error.\n");
+            return(-1);
+         }
+         ost_ptr = ost + ost_offset_p;
+         ost_end = (ost + ost_offset_e) + OST_BLOCK;
+      }
+      ost_offset_p = (oststr_ptr - oststr);
+      ost_offset_e = (oststr_end - oststr);
+      if((oststr_ptr + (slen+1+4)) > oststr_end) {
+         if((oststr = realloc(oststr, (unsigned)(oststr_end + OST_BLOCK))) == NULL) {
+            printf("OSTSTR memory reallocation error.\n");
+            return(-1);
+         }
+         oststr_ptr = oststr + ost_offset_p;
+         oststr_end = (oststr + ost_offset_e) + OST_BLOCK;
+      }
+   }
+
+   // If this is a debug symbol and the include debug symbol flag (-g) is not set then do nothing
+   if((type & 0xF0000000) && !gflag) { 
+      // Do nothing
+   } else {
+      ostresult = ost_lookup(name);                         // Get symbol index in OST
+      // If the symbol is in the output symbol table and the bflag is set (don't remove multiply 
+      // defined locals) and this is not an external/global symbol *** OR *** the symbol is not 
+      // in the output symbol table then add it.
+      if(((ostresult != -1) && bflag && !(type & 0x01000000)) || 
+         ((ostresult != -1) && gflag &&  (type & 0xF0000000)) || (ostresult == -1)) {
+         if((type & 0xF0000000) == 0x40000000)
+            putlong(ost_ptr, 0x00000000);                   // Zero string table offset for dbg line
+         else
+            putlong(ost_ptr, (oststr_ptr - oststr));        // String table offset of symbol string
+         putlong(ost_ptr + 4, type );
+         putlong(ost_ptr + 8, value);
+         ost_ptr += 12;
+         // If the symbol type is anything but a debug line information symbol then write 
+         // the symbol string to the string table
+         if((type & 0xF0000000) != 0x40000000) {
+            strcpy(oststr_ptr, name);                       // Put symbol name in string table
+            *(oststr_ptr + slen) = '\0';                    // Add null terminating character
+            oststr_ptr += (slen + 1);
+            putlong(oststr_ptr, 0x00000000);                // Null terminating long
+            putlong(oststr, (oststr_ptr - oststr));         // Update size of string table
+         }
+         return(ost_index++);                               // Return OST index
+      }
+   }
+
+   return(0); // not sure about this as it could affect return indices. needed to stop return error.
+}
+
+//
+// --- Return the Index of a Symbol in the Output Symbol Table -------------------------------------
+//
+
+int ost_lookup(char *sym) {
+   int i;                                                   // Iterator
+   int stro = 4;                                            // Offset in string table
+
+   for(i = 0; i < ost_index; i++) {
+      if(!strcmp(oststr+stro, sym)) {
+         return(i+1);
+      } else {
+         stro += strlen(oststr+stro) + 1;
+      }
+   }
+
+   return(-1);
+}
+
+//
+// --- Add Unresolved Externs to the Output Symbol Table -------------------------------------------
+//
+
+int dounresolved(void) {
+   struct HREC *hptr, *htemp;                               // Hash record pointers
+
+   hptr = unresolved;                                       // Point to unresolved symbols list
+   
+   while(hptr != NULL) {                                    // While unresolved list is valid
+      if(ost_add(hptr->h_sym, T_EXT, 0L) == -1) return(1);
+          htemp = hptr->h_next;                                 // Temporarily get ptr to next record
+          free(hptr);                                           // Free current record
+          hptr = htemp;                                         // Make next record ptr, current
+   }
+   
+   unresolved = NULL;                                       // Zero unresolved record list
+   
+   return(0);
+}
+    
+// -------------------------------------------------------------------------------------------------
+// Update Object File TEXT and DATA Segments Based on Relocation Records. Take in an OFILE header 
+// and flag (T_TEXT, T_DATA) to process. Return (0) is successful or non-zero (1) if failed.
+// -------------------------------------------------------------------------------------------------
+
+int reloc_segment(struct OFILE *ofile, int flag) {
+   char *symtab;                                            // Start of symbol table 
+   char *symbols;                                           // Start of symbols
+   char *sptr;                                              // Start of segment data
+   char *rptr;                                              // Start of segment relocation records
+   unsigned symidx;                                         // Offset to symbol
+   unsigned addr;                                           // Relocation address
+   unsigned rflg;                                           // Relocation flags
+   unsigned olddata;                                        // Old segment data at reloc address
+   unsigned newdata = 0;                                    // New segment data at reloc address
+   unsigned pad;                                            // Temporary to calculate phrase padding
+   int i;                                                   // Iterator
+   char sym[SYMLEN];                                        // String for symbol name/hash search
+   int ssidx;                                               // Segment size table index
+   unsigned glblreloc;                                      // Global relocation flag
+   unsigned absreloc;                                       // Absolute relocation flag
+   unsigned relreloc;                                       // Relative relocation flag
+   unsigned swcond;                                         // Switch statement condition
+   unsigned relocsize;                                      // Relocation record size
+
+   // If there is no TEXT relocation data for the selected object file segment then update the COF
+   // TEXT segment offset allowing for the phrase padding
+   if((flag == T_TEXT) && !ofile->o_header.absrel.reloc.tsize) {
+      pad = ((ofile->o_header.tsize+secalign) & ~secalign); // TEXT segment size plus padding
+      textoffset += (ofile->o_header.tsize + (pad - ofile->o_header.tsize)); 
+      if(vflag > 1) {                                       // Verbose mode information
+         printf("reloc_segment(%s, TEXT) : No Relocation Data\n", ofile->o_name);
+      }
+      return(0);
+   }
+
+   // If there is no DATA relocation data for the selected object file segment then update the COF
+   // DATA and BSS segment offsets allowing for the phrase padding
+   if((flag == T_DATA) && !ofile->o_header.absrel.reloc.dsize) {
+      pad = ((ofile->o_header.dsize+secalign) & ~secalign); // DATA segment size plus padding
+      dataoffset += (ofile->o_header.dsize + (pad - ofile->o_header.dsize));
+      pad = ((ofile->o_header.bsize+secalign) & ~secalign); // BSS segment size plus padding
+      bssoffset += (ofile->o_header.bsize + (pad - ofile->o_header.bsize));
+      if(vflag > 1) {                                       // Verbose mode information
+         printf("reloc_segment(%s, DATA) : No Relocation Data\n", ofile->o_name);
+      }
+      return(0);
+   }
+
+   // Verbose mode information
+   if(vflag > 1) {                                              
+      printf("reloc_segment(%s, %s) : Processing Relocation Data\n", 
+             ofile->o_name, flag == T_DATA ? "DATA" : "TEXT");
+   }
+   
+   // Obtain pointer to start of symbol table
+   symtab = (ofile->o_image + 32 + ofile->o_header.tsize + ofile->o_header.dsize +
+             ofile->o_header.absrel.reloc.tsize + ofile->o_header.absrel.reloc.dsize);                                        
+
+   // Obtain pointer to start of symbols
+   symbols = symtab + ofile->o_header.ssize;
+
+   // Obtain pointer to start of TEXT segment
+   sptr = ofile->o_image + 32;                              
+
+   // Obtain pointer to start of TEXT relocation records
+   rptr = sptr + (ofile->o_header.tsize + ofile->o_header.dsize);
+
+   relocsize = ofile->o_header.absrel.reloc.tsize;
+
+   // Update pointers if DATA relocation records are being processed
+   if(flag == T_DATA) {                                     
+      sptr += ofile->o_header.tsize;                        // Start of DATA segment
+      rptr += ofile->o_header.absrel.reloc.tsize;           // Start of DATA relocation records
+      relocsize = ofile->o_header.absrel.reloc.dsize;
+   }
+
+   // Process each relocation record for the TEXT segment
+   for(i = 0; i < (int)relocsize; i += 8) {
+      // Obtain both the relocation address and the relocation flags from the object file image
+      addr = getlong(rptr);
+      rflg = getlong(rptr + 4);
+      glblreloc = (rflg & 0x00000010) ? 1 : 0;              // Set global relocation flag
+      absreloc = (rflg & 0x00000040) ? 1 : 0;               // Set absolute relocation flag
+      relreloc = (rflg & 0x000000A0) ? 1 : 0;               // Set relative relocation flag
+
+      // Additional processing required for global relocations
+      if(glblreloc) {                                    
+         // Obtain the string table index for the relocation symbol, look for it in the globals
+         // hash table to obtain information on that symbol. For the hash calculation to work
+         // correctly it must be placed in a 'clean' string before looking it up.
+         symidx = getlong(symtab + ((rflg >> 8) * 12));
+         memset(sym, 0, SYMLEN);          
+         strcpy(sym, symbols + symidx);
+         olddata = newdata = 0;                             // Initialise old and new segment data
+         ssidx = ost_lookup(sym);
+         newdata = getlong(ost + ((ssidx-1) * 12) + 8);
+      }
+
+      // Obtain the existing long word segment data and flip words if the relocation flags
+      // indicate it relates to a RISC MOVEI instruction
+      olddata = getlong(sptr + addr);
+      if(rflg & 0x01) olddata = _SWAPWORD(olddata);
+
+      // Process record dependant on segment it relates to; TEXT, DATA or BSS. Construct a new
+      // relocated segment long word based on the required segment base address, the segment
+      // data offset in the resulting COF file and the offsets from the incoming object file.
+      //swcond = glblreloc ? ((hptr->h_type & 0x0E000000) >> 16) : (rflg & 0xFFFFFF00);
+      swcond = (rflg & 0xFFFFFF00);
+      if(!glblreloc) {
+         switch(swcond) {
+            case 0x00000200:                                // Absolute Value
+               break;
+            case 0x00000400:                                // TEXT segment relocation record
+               if(!glblreloc) 
+                  if(flag == T_TEXT) newdata = tbase + textoffset + olddata;
+                  else newdata = tbase + dataoffset + olddata;
+               break;
+            case 0x00000600:                                // DATA segment relocation record
+                  if(!glblreloc) newdata = dbase + dataoffset + (olddata - ofile->o_header.tsize);
+               break;
+            case 0x00000800:                                // BSS segment relocation record
+               if(!glblreloc) newdata = bbase + bssoffset + 
+                              (olddata - (ofile->o_header.tsize + ofile->o_header.dsize));
+               break;
+         }
+      } else {
+                 if (!relreloc) newdata += olddata;
+      }
+         // Set absolute (long) or relative (word) address of symbol
+      if (absreloc) {
+         // Flip the new long word segment data if the relocation record indicated a RISC MOVEI 
+         // instruction and place the resulting data back in the COF segment
+         if(rflg & 0x01) newdata = _SWAPWORD(newdata);
+
+         putlong(sptr + addr, newdata);
+
+      }
+      else if (relreloc) {
+                putword(sptr + addr, newdata - tbase - addr - ofile->o_tbase);
+         }
+
+      rptr += 8;                                            // Point to the next relocation record
+   }
+
+   // Update the COF segment offset allowing for the phrase padding.
+   if(flag == T_TEXT) {                                     
+      pad = ((ofile->o_header.tsize+secalign) & ~secalign); // TEXT segment plus padding
+      textoffset += (ofile->o_header.tsize + (pad - ofile->o_header.tsize));
+   } else {
+      pad = ((ofile->o_header.dsize+secalign) & ~secalign); // DATA segment plus padding
+      dataoffset += (ofile->o_header.dsize + (pad - ofile->o_header.dsize));
+      pad = ((ofile->o_header.bsize+secalign) & ~secalign); // BSS segment plus padding
+      bssoffset += (ofile->o_header.bsize + (pad - ofile->o_header.bsize)); 
+   }
+
+   return(0);                                               // Return value, should always be zero
+}
+
+//
+// -------------------------------------------------------------------------------------------------
+// Add a path character to the end of string 's' if it doesn't already end with one.
+// The last occurrance of '/' or '\\' in the string is assumed to be the path character.
+// -------------------------------------------------------------------------------------------------
+//
+
+void pathadd(char *s) {
+   char pathchar = 0;
+
+   while(*s) {
+          if(*s == '/' || *s == '\\') pathchar = *s;
+      s++;
+   }
+   s--;
+   if(*s == pathchar) return;
+
+   *++s = pathchar;
+   *++s = 0;
+}
+
+//
+// -------------------------------------------------------------------------------------------------
+// Try to open "name", "name.o", "${libdir}name", "${libdir}name.o". Return the handle of the file 
+// successfully opened. p_name is updated to point to a malloc()'ed string which is the name which 
+// actually got opened. p_name will return unchanged if the file can't be found.
+// -------------------------------------------------------------------------------------------------
+//
+
+int tryopen(char **p_name) {
+   char *name = *p_name;                                    // Filename
+   char *tmpbuf, *lastdot;                                  // Buffer and 'dot' pointers
+   int fd, hasdot;                                          // File descriptor and 'has dot' flag
+
+   // Note that libdir will be an empty string if there is none specified 
+   if((tmpbuf = malloc((long)strlen(name) + strlen(libdir) + 3)) == NULL) {
+      printf("tryopen() : out of memory\n");
+      return(-1);
+   }
+   strcpy(tmpbuf, name);
+    
+   hasdot = ((lastdot = strrchr(tmpbuf, '.')) > strrchr(tmpbuf, '/')) && 
+            (lastdot > strrchr(tmpbuf, '\\'));
+
+   if((fd = open(tmpbuf, _OPEN_FLAGS)) >= 0) goto ok;       // Try to open file as passed first
+   if(!hasdot) {                                         
+      strcat(tmpbuf, ".o");                                 // Try to open file with '.o' added
+      if((fd = open(tmpbuf, _OPEN_FLAGS)) >= 0) goto ok;
+   }
+
+   // Try the libdir only if the name isn't already anchored
+   if(*name != '/' && *name != '\\' && !strchr(name, ':')) {
+      strcpy(tmpbuf,libdir);
+      // Add a trailing path char if there isn't one already
+      pathadd(tmpbuf);
+      strcat(tmpbuf, name);
+      if((fd = open(tmpbuf, _OPEN_FLAGS)) >= 0) goto ok;
+      if(!hasdot) {
+         strcat(tmpbuf, ".o");
+         if((fd = open(tmpbuf, _OPEN_FLAGS)) >= 0) goto ok;
+      }
+   }
+
+   return(-1);                                              // Couldn't open file at all
+
+   ok:                                                      // What more Atari label use - sigh!!!
+   
+   if((tmpbuf = realloc(tmpbuf, (long)strlen(tmpbuf) + 1)) == NULL) {
+      printf("tryopen() : out of memory\n");
+      return(-1);
+   }
+   *p_name = tmpbuf;
+    
+   return(fd);                                              // Return file descriptor
+}
+
+//
+// --- Archive File Use, Needs to be Removed -------------------------------------------------------
+//
+
+void put_name(struct OFILE *p) {
+   int flag = *(p->o_arname);
+   printf("%s%s%s", flag ? p->o_arname : "", flag ? ":" : "", p->o_name);
+}
+
+//
+// -------------------------------------------------------------------------------------------------
+// Collect file names and handles in a buffer so there is less disk activity.
+// Call dofile with flag FALSE for normal object files and archives.
+// Call it with flag TRUE and a symbol name for include files (-i).
+// -------------------------------------------------------------------------------------------------
+//
+
+int dofile(char *fname, int flag, char *sym) {
+   int fd;                                                  // File descriptor
+   int temp;                                                // Temporary storage
+
+   if(vflag) {                                              // Verbose information
+      printf("dofile() : `%s' %s", fname, flag ? "INCLUDE" : "NORMAL");
+      if(flag) printf(" symbol %s", sym);
+      printf("\n");
+   }
+
+   if(hd == NHANDLES) {                                     // Reached maximum file handles
+      if(flush_handles()) return(1);
+   }
+    
+   if((fd = tryopen(&fname)) < 0) {                         // Attempt to open input file
+      printf("Cannot find input module %s\n", fname);
+      return(1);
+   }
+
+   // The file is open; save its info in the handle and name arrays 
+   handle[hd] = fd;
+   name[hd] = fname;                                        // This is the name from tryopen()
+   hflag[hd] = flag;
+    
+   if(flag) {                                               // Include files
+      temp = strlen(sym);                                   // Get symbol length
+      if(temp > 99) {                                       // 100 chars is max length of a symbol 
+         sym[99] = '\0';
+         temp = 99;
+      }
+
+      // Malloc enough space for two symbols, then build the second one. Second one may be one 
+      // character longer than first 
+      if((hsym1[hd] = malloc((long)temp + 1)) == NULL ||
+         (hsym2[hd] = malloc((long)temp + 2)) == NULL) {
+         printf("dofile() : out of memory for include-file symbols\n");
+         return(1);
+      }
+      strcpy(hsym1[hd], sym);
+      strcpy(hsym2[hd], sym);
+
+      if(temp == 99) {
+         if(sym[99] == 'x') {
+            printf("Last char of %s is already 'x': choose another name\n", sym);
+            return(1);
+         }
+         hsym2[hd][99] = 'x';
+      } else {
+         hsym2[hd][temp] = 'x';
+         hsym2[hd][temp+1] = '\0';
+      }
+   }
+    
+   hd++;                                                    // Increment next handle index
+
+   return(0);                                               // No problems
+}
+
+
+//
+// --- Pad TEXT or DATA Segment to the Requested Boundary ---------------------
+//
+int segmentpad(FILE * fd, long segsize, int value)
+{
+   long padsize;                                            // Number of pad bytes needed
+   int i;                                                   // Good 'ol iterator
+   char padarray[32];                                       // Array of padding bytes
+   char * padptr;                                           // Pointer to array
+
+   // Determine the number of padding bytes that are needed
+   padsize = (segsize + secalign) & ~secalign;
+   padsize = padsize - segsize;
+   
+   // Fill pad array if padding is required
+   if (padsize)
+   {
+      padptr = padarray;
+
+         for(i=0; i<16; i++)
+         {
+         putword(padptr, value);
+         padptr += 2;
+      }
+
+      symoffset += padsize;
+
+      if (fwrite(padarray, padsize, 1, fd) != 1)            // Write padding bytes
+         return 1;
+   }
+
+   return 0;                                                // All done
+}
+
+
+//
+// --- Write the Output File --------------------------------------------------
+//
+int write_ofile(struct OHEADER * header)
+{
+   FILE *fd;                                                // File descriptor
+   unsigned osize;                                          // Object segment size
+   struct OFILE *otemp;                                     // Object file pointer
+   int i, j;                                                // Iterators
+   char himage[0x168];                                      // Header image (COF = 0xA8)
+   unsigned tsoff, dsoff, bsoff;                            // Segment offset values
+   unsigned index, type, value;                             // Symbol table index, type and value
+   short abstype;                                           // ABS symbol type
+   char symbol[14];                                         // Symbol record for ABS files
+   int slen;                                                // Symbol string length
+
+   symoffset = 0;                                           // Initialise symbol offset
+
+   if(strchr(ofile, '.') == NULL) {                         // Add correct output extension if none
+      if(aflag && cflag) strcat(ofile, ".cof");             // COF files
+      else if(aflag && !cflag) strcat(ofile, ".abs");       // ABS files
+      else strcat(ofile, ".o");                             // Object files (partial linking etc)
+   }
+
+   fd = fopen(ofile, "wb");                                 // Attempt to open output file
+   if(!fd) {                              
+      printf("Can't open output file %s\n", ofile);         // Error opening output file
+      return 1;
+   }
+
+   // Build the output file header
+   if(cflag) {                                              // Absolute (COF) header
+      tsoff = dsoff = bsoff = 0xA8;                         // Initialises segment offsets
+
+      // Process each object file segment size to obtain a cumulative segment size for both 
+      // the TEXT and DATA segments
+      for(i = 0; i < (int)obj_index; i++) {
+         dsoff += obj_segsize[i][0];                        // Adding TEXT segment sizes
+         bsoff += obj_segsize[i][0] + obj_segsize[i][1];    // Adding TEXT and DATA segment sizes
+      }
+
+      // Currently this only builds a COF absolute file. Conditionals and additional code will
+      // need to be added for ABS and partial linking.
+
+      // Build the COF_HDR
+      putword(himage + 0,   0x0150               );         // Magic Number (0x0150)
+      putword(himage + 2,   0x0003               );         // Sections Number (3)
+      putlong(himage + 4,   0x00000000           );         // Date (0L)
+      putlong(himage + 8,   dsoff + header->dsize);         // Offset to Symbols Section
+      putlong(himage + 12,  ost_index);                     // Number of Symbols
+      putword(himage + 16,  0x001C               );         // Size of RUN_HDR (0x1C)
+      putword(himage + 18,  0x0003               );         // Executable Flags (3)
+
+      // Build the RUN_HDR
+      putlong(himage + 20,  0x00000107           );         // Magic/vstamp
+      putlong(himage + 24,  header->tsize        );         // TEXT size in bytes
+      putlong(himage + 28,  header->dsize        );         // DATA size in bytes
+      putlong(himage + 32,  header->bsize        );         // BSS size in bytes
+      putlong(himage + 36,  tbase                );         // Start of executable, normally @TEXT
+      putlong(himage + 40,  tbase                );         // @TEXT      
+      putlong(himage + 44,  dbase                );         // @DATA
+
+      // Build the TEXT SEC_HDR
+      putlong(himage + 48,  0x2E746578           );                     
+      putlong(himage + 52,  0x74000000           );         // ".text"
+      putlong(himage + 56,  tbase                );         // TEXT START
+      putlong(himage + 60,  tbase                );         // TEXT START
+      putlong(himage + 64,  header->tsize        );         // TEXT size in bytes
+      putlong(himage + 68,  tsoff                );         // Offset to section data in file
+      putlong(himage + 72,  0x00000000           );         // Offset to section reloc in file (0L)
+      putlong(himage + 76,  0x00000000           );         // Offset to debug lines structures (0L)
+      putlong(himage + 80,  0x00000000           );         // Nreloc/nlnno (0L)
+      putlong(himage + 84,  0x00000020           );         // SEC_FLAGS: STYP_TEXT
+
+      // Build the DATA SEC_HDR
+      putlong(himage + 88,  0x2E646174           );                     
+      putlong(himage + 92,  0x61000000           );         // ".data"
+      putlong(himage + 96,  dbase                );         // DATA START
+      putlong(himage + 100, dbase                );         // DATA START
+      putlong(himage + 104, header->dsize        );         // DATA size in bytes
+      putlong(himage + 108, dsoff                );         // Offset to section data in file
+      putlong(himage + 112, 0x00000000           );         // Offset to section reloc in file (0L)
+      putlong(himage + 116, 0x00000000           );         // Offset to debugging lines structures (0L)
+      putlong(himage + 120, 0x00000000           );         // Nreloc/nlnno (0L)
+      putlong(himage + 124, 0x00000040           );         // SEC_FLAGS: STYP_DATA
+
+      // Build the BSS SEC_HDR
+      putlong(himage + 128, 0x2E627373           );                     
+      putlong(himage + 132, 0x00000000           );         // ".bss"
+      putlong(himage + 136, bbase                );         // BSS START
+      putlong(himage + 140, bbase                );         // BSS START
+      putlong(himage + 144, header->bsize        );         // BSS size in bytes
+      putlong(himage + 148, bsoff                );         // Offset to section data in file
+      putlong(himage + 152, 0x00000000           );         // Offset to section reloc in file (0L)
+      putlong(himage + 156, 0x00000000           );         // Offset to debugging lines structures (0L)
+      putlong(himage + 160, 0x00000000           );         // Nreloc/nlnno (0L)
+      putlong(himage + 164, 0x00000080           );         // SEC_FLAGS: STYP_BSS
+   
+      symoffset = 168;                                      // Update symbol offset
+   } else {                                                 // Absolute (ABS) header
+      // Build the ABS header
+      putword(himage + 0,   0x601B               );         // Magic Number (0x601B)
+      putlong(himage + 2,   header->tsize        );         // TEXT segment size
+      putlong(himage + 6,   header->dsize        );         // DATA segment size
+      putlong(himage + 10,  header->bsize        );         // BSS segment size
+      putlong(himage + 14,  ost_index * 14       );         // Symbol table size (?)
+      putlong(himage + 18,  0x00000000           );         // 
+      putlong(himage + 22,  tbase                );         // TEXT base address
+      putword(himage + 26,  0xFFFF               );         // Flags (?)
+      putlong(himage + 28,  dbase                );         // DATA base address
+      putlong(himage + 32,  bbase                );         // BSS base address
+
+      symoffset = 36;                                       // Update symbol offset
+   }
+
+   // Write the header, but not if noheaderflag
+   if(!cflag) {                                             // Absolute (ABS) header
+      if(!noheaderflag)
+         if(fwrite(himage, 36, 1, fd) != 1) 
+            goto werror;
+   } else {                                                 // Absolute (COF) header
+      if(fwrite(himage, 168, 1, fd) != 1) 
+         goto werror;
+   }
+
+   // Write the TEXT segment of each object file
+   for(otemp = olist; otemp != NULL; otemp = otemp->o_next) {
+      osize = otemp->o_header.tsize;
+      if(osize) {                                           // Write only if segment has size
+         if(vflag > 1)
+            printf("Writing TEXT Segment of %s\n", otemp->o_name);
+         if(fwrite(otemp->o_image + 32, osize, 1, fd) != 1) 
+            goto werror;
+            // Pad to required alignment boundary
+            if(segmentpad(fd, osize, 0x0000))          
+                        goto werror;
+            symoffset += osize;
+      }
+   }
+
+   // Write the DATA segment of each object file
+   for(otemp = olist; otemp != NULL; otemp = otemp->o_next) {
+      osize = otemp->o_header.dsize;
+      if(osize) {                                           // Write only if the segment has size
+         if(vflag > 1)
+            printf("Writing DATA Segment of %s\n", otemp->o_name);
+         if(fwrite((otemp->o_image + 32 + otemp->o_header.tsize), osize, 1, fd) != 1) goto werror;
+         // Pad to required alignment boundary
+         if(segmentpad(fd, osize, 0))                       
+         goto werror;
+         symoffset += osize;
+      }
+   }
+
+if(!noheaderflag) {
+
+   // Write the symbols table and string table
+   if(cflag) {                                              // Absolute (COF) symbol/string table
+      if(header->ssize) {
+         if(fwrite(ost, (ost_ptr - ost), 1, fd) != 1) goto werror;
+         if(fwrite(oststr, (oststr_ptr - oststr), 1, fd) != 1) goto werror;
+      }
+   } else {                                                 // Absolute (ABS) symbol/string table
+      // The symbol and string table have been created as part of the dosym() function and the 
+      // output symbol and string tables are in COF format. For an ABS file we need to process 
+      // through this to create the 14 character long combined symbol and string table.
+      // Format of symbol table in ABS: AAAAAAAATTVVVV, where (A)=STRING, (T)=TYPE & (V)=VALUE
+
+      for(i = 0; i < ost_index; i++) {
+         memset(symbol, 0, 14);                             // Initialise symbol record
+         abstype = 0;                                       // Initialise ABS symbol type
+         slen = 0;                                          // Initialise symbol string length
+         index = getlong(ost + (i * 12));                   // Get symbol index
+         type  = getlong((ost + (i * 12)) + 4);             // Get symbol type
+         if(type & 0xF0000000) continue;                    // Not doing debug symbols
+         value = getlong((ost + (i * 12)) + 8);             // Get symbol value
+         slen = strlen(oststr + index);
+         if(slen > 8) {                                     // Get symbol string (maximum 8 chars)
+            for(j = 0; j < 8; j++) *(symbol + j) = *(oststr + index + j);
+         } else {
+            for(j = 0; j < slen; j++) *(symbol + j) = *(oststr + index + j);
+         }
+         switch(type) {                                     // Modify to ABS symbol type
+            case 0x02000000: abstype = (short)ABST_DEFINED;                           break;
+            case 0x04000000: abstype = (short)ABST_DEFINED | ABST_TEXT;               break;
+            case 0x05000000: abstype = (short)ABST_DEFINED | ABST_GLOBAL | ABST_TEXT; break;
+            case 0x06000000: abstype = (short)ABST_DEFINED | ABST_DATA;               break;
+            case 0x07000000: abstype = (short)ABST_DEFINED | ABST_GLOBAL | ABST_DATA; break;
+            case 0x08000000: abstype = (short)ABST_DEFINED | ABST_BSS;                break;
+            case 0x09000000: abstype = (short)ABST_DEFINED | ABST_GLOBAL | ABST_BSS;  break;
+            default:
+               printf("write_ofile: abs, cannot determine symbol type\n");
+               type = 0;
+               break;
+         }
+         putword(symbol + 8, abstype);                      // Write back new ABS type
+         putlong(symbol + 10, value);                       // Write back value
+         if(fwrite(symbol, 14, 1, fd) != 1) goto werror;    // Write symbol record
+      }
+   }
+
+}
+
+   // Close the file 
+   if(fclose(fd)) {
+      printf("Close error on output file %s\n",ofile);
+      return(1);
+   } else return(0);
+    
+   werror:                                                  // OMG! Why did Atari use these :)
+
+   printf("Write error on output file %s\n", ofile);
+   fclose(fd);                                                        // Try to close output file anyway
+   return(1);
+}
+
+//
+// --- Display the Symbol Load Map -----------------------------------------------------------------
+//
+
+int write_map(struct OHEADER *header) {
+   unsigned i, o;                                           // Inner and outer loop iterators
+   unsigned c;                                              // Column number
+   unsigned index;                                          // Symbol string index
+   unsigned type;                                           // Symbol type
+   unsigned value;                                          // Symbol value
+   char *symbol;                                            // Symbol string value
+
+   if(ost_index == 0) return(0);                            // Return if no symbols to map
+   
+   printf("LOAD MAP\n\n");
+
+   // Outer loop for each of the symbol areas to map out; 
+   // 0 = NON-RELOCATABLE SYMBOLS
+   // 1 = TEXT-SEGMENT RELOCATABLE SYMBOLS
+   // 2 = DATA-SEGMENT RELOCATABLE SYMBOLS
+   // 3 = BSS-SEGMENT RELOCATABLE SYMBOLS
+   for(o = 0; o < 4; o++) {                                 
+      // Display the correct map header for the symbols being processed
+      switch(o) {
+         case 0: printf("NON-RELOCATABLE SYMBOLS\n\n");          break;
+         case 1: printf("TEXT-SEGMENT RELOCATABLE SYMBOLS\n\n"); break;
+         case 2: printf("DATA-SEGMENT RELOCATABLE SYMBOLS\n\n"); break;
+         case 3: printf("BSS-SEGMENT RELOCATABLE SYMBOLS\n\n");  break;
+      }
+
+      c = 0;                                                // Initialise column number
+
+      // Inner loop to process each record in the symbol table
+      for(i = 0; i < (unsigned)ost_index; i++) {
+         index  = getlong(ost + (i * 12));                  // Get symbol string index
+         type   = getlong(ost + (i * 12) + 4);              // Get symbol type
+         value  = getlong(ost + (i * 12) + 8);              // Get symbol value
+         symbol = oststr + index;                           // Get symbol string
+         
+         if(c == 3) {                                       // Display only three columns
+            printf("\n");
+            c = 0;       
+         }
+
+         // If local symbols not included and the type is local then go to next symbol record
+         if(!lflag & !(type & 0x01000000)) continue;
+
+         // Output each symbol to the display, dependant on type
+         switch(o) {
+            case 0:                                         // Non-relocatable symbols
+               if(type == 0x02000000 || type == 0x03000000) {
+                  printf("%-8s %c  %08X   ", symbol, (type & 0x01000000) ? 'G' : 'L', value);
+                  c++;
+               }
+               break;
+            case 1:                                         // TEXT segment relocatable symbols
+               if(type == 0x04000000 || type == 0x05000000) {
+                  printf("%-8s %c  %08X   ", symbol, (type & 0x01000000) ? 'G' : 'L', value);
+                  c++;
+               }
+               break;
+            case 2:                                         // DATA segment relocatble symbols
+               if(type == 0x06000000 || type == 0x07000000) {
+                  printf("%-8s %c  %08X   ", symbol, (type & 0x01000000) ? 'G' : 'L', value);
+                  c++;
+               }
+               break;
+            case 3:                                         // BSS segment relocatable symbols
+               if(type == 0x08000000 || type == 0x09000000) {
+                  printf("%-8s %c  %08X   ", symbol, (type & 0x01000000) ? 'G' : 'L', value);
+                  c++;
+               }
+               break;
+         }
+      }
+
+      printf("\n\n");
+   }
+
+   return(0);                                               // All done
+}
+
+
+//
+// --- Convert ASCII to Hexadecimal -------------------------------------------
+//
+//int atolx(char * string, long * value)
+int atolx(char * string, int * value)
+{
+       *value = 0;
+
+       while (isxdigit(*string))
+       {
+               if (isdigit(*string))
+               {
+                       *value = (*value << 4) + (*string++ - '0');
+               }
+               else
+               {
+                       if (isupper(*string))
+                               *string = tolower(*string);
+
+                       *value = (*value << 4) + ((*string++ - 'a') + 10);
+               }
+       }
+
+       if (*string != '\0')
+       {
+               printf("Invalid hexadecimal value");
+               return 1;
+       }
+
+       return 0;
+}
+
+
+//
+// ----------------------------------------------------------------------------
+// Stuff the (long) value of a string into the value argument. RETURNS TRUE if
+// the string doesn't parse.  Parses only as a hex string.
+// ----------------------------------------------------------------------------
+//
+//int getval(char * string, long * value)
+int getval(char * string, int * value)
+{
+   return atolx(string, value);
+}
+
+
+//
+// ----------------------------------------------------------------------------
+// Create one big .o file from the images already in memory, returning a
+// pointer to an OHEADER. Note that the oheader is just the header for the
+// output (plus some other information). The text, data, and fixups are all
+// still in the ofile images hanging off the global `olist'.
+// ----------------------------------------------------------------------------
+//
+struct OHEADER * make_ofile()
+{
+   unsigned tptr, dptr, bptr;                               // Bases in runtime model
+   int ret = 0;                                             // Return value
+   struct OFILE *otemp, *oprev, *ohold;                     // Object file list pointers
+   struct OHEADER *header;                                  // Output header pointer
+
+   textsize = datasize = bsssize = 0;                       // Initialise cumulative segment sizes
+
+   // For each object file, accumulate the sizes of the segments but remove those 
+   // object files which are unused
+   oprev = NULL;                                            // Init previous obj file list ptr
+   otemp = olist;                                           // Set temp pointer to object file list
+   while (otemp != NULL) {
+      if(!(otemp->o_flags & O_ARCHIVE)) {                   // UNUSED !!!!!
+         if((otemp->o_flags & O_USED) == 0) {
+            if(wflag) {
+               printf("Unused object file ");
+               put_name(otemp);
+               printf(" discarded.\n");
+            }
+            if(oprev == NULL) {
+               olist = otemp->o_next;
+            } else {
+               oprev -> o_next = otemp->o_next;
+            }
+            ohold = otemp;
+            free(ohold->o_image);
+            free(ohold);
+         } else {
+            // Increment total of segment sizes ensuring requested alignment
+            textsize += (otemp->o_header.tsize+secalign) & ~secalign;
+            datasize += (otemp->o_header.dsize+secalign) & ~secalign;
+            bsssize  += (otemp->o_header.bsize+secalign) & ~secalign;
+                     oprev = otemp;
+         }
+      }
+      otemp = otemp->o_next;                                // Go to next object file list pointer
+   }
+
+   // Update base addresses and create symbols _TEXT_E, _DATA_E and _BSS_E
+   tbase = tval;
+   ost_add("_TEXT_E", 0x05000000, tval + textsize);
+   if(!dval) {
+      // DATA follows TEXT
+      dbase = tval + textsize;
+      ost_add("_DATA_E", 0x07000000, tval + textsize + datasize);
+      if(!bval) {
+         // BSS follows DATA
+         bbase = tval + textsize + datasize;
+         ost_add("_BSS_E", 0x09000000, tval + textsize + datasize + bsssize);
+      } else { 
+         // BSS is independant of DATA
+         bbase = bval;
+         ost_add("_BSS_E", 0x09000000, bval + bsssize);
+      }
+   } else {
+      // DATA is independant of TEXT
+      dbase = dval;
+      ost_add("_DATA_E", 0x07000000, dval + datasize);
+      if(!bval) {
+         // BSS follows DATA
+         bbase = dval + datasize;
+         ost_add("_BSS_E", 0x09000000, dval + datasize + bsssize);
+      } else {
+         // BSS is independant of DATA
+         bbase = bval;
+         ost_add("_BSS_E", 0x09000000, bval + bsssize);
+      }
+   }
+
+   // Place each unresolved symbol in the output symbol table 
+   if(dounresolved()) return(NULL);                         
+
+   tptr = 0;                                                // Initialise base addresses
+   dptr = 0;
+   bptr = 0;
+
+   // For each file, relocate its symbols and add them to the output symbol table
+   otemp = olist;
+   oprev = NULL;
+   while (otemp != NULL) {
+      otemp->o_tbase = tptr;
+      if(!(otemp->o_flags & O_ARCHIVE)) {                   // Do rest only for non-ARCHIVE markers
+         otemp->o_dbase = dptr;
+         otemp->o_bbase = bptr;
+         tptr += (otemp->o_header.tsize+secalign) & ~secalign;
+         dptr += (otemp->o_header.dsize+secalign) & ~secalign;
+         bptr += (otemp->o_header.bsize+secalign) & ~secalign;
+      }
+      // For each symbol, (conditionally) add it to the ost 
+      // For ARCHIVE markers, this adds the symbol for the file & returns 
+      if(dosym(otemp)) 
+         return(NULL);
+          if(otemp->o_flags & O_ARCHIVE) {
+         // Now that the archive is marked, remove it from list
+         if(oprev == NULL) {
+            olist = otemp->o_next;
+         } else {
+            oprev->o_next = otemp->o_next;
+             }
+         ohold = otemp;
+         if(ohold->o_image) free(ohold->o_image);
+         free(ohold);
+      } else {
+         oprev = otemp;
+      }
+      otemp = otemp->o_next;
+   }
+    
+   // Places all the externs, globals etc into the output symbol table
+   if(docommon() == -1) return NULL;
+
+   // Create a new output file header
+   if((header = new_oheader()) == NULL) {
+      printf("make_ofile: out of memory!\n");
+      return(NULL);
+   }
+    
+   // Fill in the output header. Does not match the actual output but values used as reference
+   header->magic = 0x0150;                                  // COF magic number
+   header->tsize = textsize;                                // TEXT segment size
+   header->dsize = datasize;                                // DATA segment size
+   header->bsize = bsssize;                                 // BSS segment size
+   header->ssize = (ost_ptr - ost);                         // Symbol table size
+   header->ostbase = ost;                                   // Output symbol table base address
+   
+   // For each object file, relocate its TEXT and DATA segments. OR the result into ret so all 
+   // files get moved (and errors reported) before returning with the error condition
+   for(otemp = olist; otemp != NULL; otemp = otemp->o_next) {
+      if(!(otemp->o_flags & O_ARCHIVE)) {
+         ret |= reloc_segment(otemp, T_TEXT);               // TEXT segment relocations
+         ret |= reloc_segment(otemp, T_DATA);               // DATA segment relocations
+      }
+   }
+  
+   hash_free();                                             // Done with global symbol hash tables
+
+   return (ret ? (unsigned)NULL : header);
+}
+
+
+//
+// --- Add Symbol to Hash List ------------------------------------------------
+//
+int add_to_hlist(struct HREC **hptr, char *sym, struct OFILE *ofile, long value, int type)
+{
+   struct HREC *htemp;                                      // Temporary hash record pointer
+   int i;
+
+   if((htemp = new_hrec()) == NULL) {                       // Attempt to allocate new hash record
+      printf("Out of memory\n");
+      return 1;
+   }
+
+   for(i = 0; i < SYMLEN; i++) htemp->h_sym[i] = '\0';
+
+   strcpy(htemp->h_sym, sym);                               // Populate hash record
+   htemp->h_ofile = ofile;
+   htemp->h_value = value;
+   htemp->h_type = type;
+
+   htemp->h_next = *hptr;                                   // Update hash record pointers
+   *hptr = htemp;
+
+   return(0);
+}
+
+
+//
+// --- Add Symbol to the Unresolved Symbols Hash Table ------------------------
+//
+add_unresolved(char * sym, struct OFILE * ofile)
+{
+   if (vflag > 1)
+      printf("add_unresolved(%s,%s)\n", sym, ofile->o_name);
+
+   return add_to_hlist(&unresolved, sym, ofile, 0L, 0);
+}
+
+
+//
+// --- Generate and Return Hash Value -----------------------------------------
+//
+int dohash(char * s)
+{
+   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;
+   return(i);
+}
+
+
+//
+// --- Lookup a Symbol in the Hash Table --------------------------------------
+//
+struct HREC * lookup(char * sym)
+{
+   struct HREC * hptr = htable[dohash(sym)];                // Hash index to record based on sym
+   char symbol[SYMLEN];                                     // Temporary symbol storage
+
+   memset(symbol, 0, SYMLEN);                               // Clean string for comparison
+   strcpy(symbol, sym);
+
+   while (hptr != NULL)
+   {
+      if (symcmp(symbol, hptr->h_sym))
+         return hptr;
+
+      hptr = hptr->h_next;                                  // Return hash pointer if found
+   }
+
+   return NULL;                                            // Not found in hash table
+}
+
+
+//
+// --- Add Symbol to the Hash Table -------------------------------------------
+//
+int hash_add(char * sym, long type, long value, struct OFILE * ofile)
+{
+   struct HREC * hptr;
+   int flag = !iscommon(type);
+    
+   if (vflag > 1)
+   {
+      printf("hash_add(%s,%s,%lx,", sym, ofile->o_name,value);
+      printf("%x,%s)\n", (unsigned int)type, (flag ? "GLOBAL" : "COMMON"));
+   }
+
+   if ((hptr = lookup(sym)) == NULL)
+   {
+      return(add_to_hlist(&htable[dohash(sym)], sym, ofile, value, type));
+   }
+
+   // Already there!
+   if (iscommon(type) && !iscommon(hptr->h_type))
+   {
+      // Mismatch: global came first; warn and keep the global one 
+      if (wflag)
+         {
+         printf("Warning: %s: global from ",sym);
+         put_name(hptr->h_ofile);
+         printf(" used, common from ");
+         put_name(ofile);
+         printf(" discarded.\n");
+      }
+
+      putword(sym + 8, ABST_EXTERN);
+      putlong(sym + 10, 0L);
+   }
+   else if (iscommon(hptr->h_type) && !iscommon(type))
+   {
+      // Mismatch: common came first; warn and keep the global one 
+      if (wflag)
+         {
+         printf("Warning: %s: global from ", sym);
+         put_name(ofile);
+         printf(" used, common from ");
+         put_name(hptr->h_ofile);
+         printf(" discarded.\n");
+      }
+
+      hptr->h_type = type;
+      hptr->h_ofile = ofile;
+      hptr->h_value = value;
+   }
+   else if (flag)
+   {                                                    // They're both global
+      // Global exported by another ofile; warn and make this one extern 
+      if (wflag)
+         {
+         printf("Duplicate symbol %s: ", sym);
+         put_name(hptr->h_ofile);
+         printf(" used, ");
+         put_name(ofile);
+         printf(" discarded\n");
+      }
+
+      putword(sym + 8, ABST_EXTERN);
+   }
+   else
+   {                                                             // They're both common 
+      if (hptr->h_value < value)
+         {
+         hptr->h_value = value;
+         hptr->h_ofile = ofile;
+      }
+   }
+
+   return(0);
+}
+
+//
+// -------------------------------------------------------------------------------------------------
+// Add the imported symbols from this file to unresolved, and the global and common symbols to the 
+// exported hash table.
+//
+// Change old-style commons (type == T_EXTERN, value != 0) to new-style ones 
+// (type == (T_GLOBAL | T_EXTERN)).
+// -------------------------------------------------------------------------------------------------
+//
+
+int add_symbols(struct OFILE *Ofile) {
+   long nsymbols;                                           // Number of symbols in object file
+   char *ptr;                                               // Object data base pointer
+   char *sfix;                                              // Symbol fixup table pointer
+   char *sstr;                                              // Symbol string table pointer
+   long index;                                              // String index
+   long type;                                               // Symbol type
+   long value;                                              // Symbol value
+   struct HREC *hptr;                                       // Hash record pointer
+   char symbol[SYMLEN];
+
+   if(vflag > 1)
+      printf("Add symbols for file %s\n", Ofile->o_name);
+
+   ptr = Ofile->o_image + 32 +                              // Get base pointer, start of sym fixups
+         Ofile->o_header.tsize + 
+         Ofile->o_header.dsize + 
+         Ofile->o_header.absrel.reloc.tsize +
+         Ofile->o_header.absrel.reloc.dsize;
+   sfix = ptr;                                              // Set symbol fixup pointer
+   sstr = sfix + Ofile->o_header.ssize;                     // Set symbol table pointer
+   nsymbols = Ofile->o_header.ssize / 12;                   // Obtain number of symbols
+
+   while(nsymbols) {
+      index = getlong(sfix);                                // Get symbol string index
+      type  = getlong(sfix+4);                              // Get symbol type
+      value = getlong(sfix+8);                              // Get symbol value
+      memset(symbol, 0, SYMLEN);
+      strcpy(symbol, sstr+index);
+
+      if(type & T_EXT) {                                    // If this is a global/external
+         if((type - T_EXT)) {
+            if(hash_add(symbol, type, value, Ofile)) {      // Then add to hash table
+               return(1);                                   // Error if addition failed
+            }
+         } else {
+            if((hptr = lookup(symbol)) != NULL) {           // If value is zero and in hash table
+               hptr->h_ofile->o_flags |= O_USED;            // Mark symbol as used
+            } else if(add_unresolved(symbol, Ofile)) {      // Otherwise add to unresolved list
+               return(1);                                   // Error if addition failed
+            }
+         }
+      }
+
+      sfix += 12;                                           // Increment symbol fixup pointer
+      nsymbols--;                                           // Decrement num of symbols to process
+   }
+
+   return(0);                                               // Success loading symbols
+}
+
+//
+// --- Process Object File for Symbols -------------------------------------------------------------
+//
+
+int doobj(char *fname, char *ptr, char *aname, int flags) {
+   struct OFILE *Ofile;                                     // Object record pointer
+   char *temp;                                              // Temporary data pointer
+
+   if((Ofile = new_ofile()) == NULL) {                      // Allocate memory for object record ptr
+      printf("Out of memory processing %s\n",fname);
+      return(1);
+   }
+
+   // Starting after all pathnames, etc., copy .o file name to Ofile
+   temp = path_tail(fname);
+   if(strlen(temp) > FNLEN - 1) {                           // Check filename length
+      printf("File name too long: %s\n", temp);
+      return(1);
+   }
+   if(strlen(aname) > FNLEN - 1) {                          // Check archive name length
+      printf("Archive name too long: %s\n", aname);
+      return(1);
+   }
+   strcpy(Ofile->o_name, temp);                             // Store filename
+   strcpy(Ofile->o_arname, aname);                          // Store archive name
+
+   Ofile->o_next  = NULL;                                   // Initialise object record information
+   Ofile->o_tbase = 0;
+   Ofile->o_dbase = 0;
+   Ofile->o_bbase = 0;
+   Ofile->o_flags = flags;
+   Ofile->o_image = ptr;
+           
+   // Don't do anything if this is just an ARCHIVE marker, just add the file to the olist
+   if(!(flags & O_ARCHIVE)) {
+      Ofile->o_header.magic = getlong(ptr);
+      Ofile->o_header.tsize = getlong(ptr+4);
+      Ofile->o_header.dsize = getlong(ptr+8);
+      Ofile->o_header.bsize = getlong(ptr+12);
+      Ofile->o_header.ssize = getlong(ptr+16);
+      Ofile->o_header.absrel.reloc.tsize = getlong(ptr+24);
+      Ofile->o_header.absrel.reloc.dsize = getlong(ptr+28);
+           
+      // Round BSS off to alignment boundary 
+      Ofile->o_header.bsize = (Ofile->o_header.bsize + secalign) & ~secalign;
+      if(Ofile->o_header.dsize & 7) {
+         printf("Warning: data segment size of ");
+         put_name(Ofile);
+         printf(" is not a phrase multiple\n");
+      }
+           
+      // Check for odd segment sizes
+      if((Ofile->o_header.tsize & 1) || (Ofile->o_header.dsize & 1) || (Ofile->o_header.bsize & 1)) {
+         printf("Error: odd-sized segment in ");
+         put_name(Ofile);
+         printf("; link aborted.\n");
+         return(1);
+      }
+       
+      if(add_symbols(Ofile)) return(1);
+   }
+       
+       // Add this file to the olist 
+       if(olist == NULL) 
+      olist = Ofile;
+       else 
+      olast->o_next = Ofile;
+       olast = Ofile;
+       return(0);
+}
+
+//
+// --- Remove Elements from Unresolved List which are Resolvable -----------------------------------
+//
+
+int dolist(void) {
+   struct HREC *uptr;                                       // Unresolved hash record pointer
+   struct HREC *prev = NULL;                                // Previous hash record pointer
+   struct HREC *htemp;                                      // Temporary hash record pointer
+   struct OFILE *ptemp;                                     // Temporary object file record pointer
+
+   while (plist != NULL) {                                  // Process object file list
+      if(doobj(plist->o_name, plist->o_image, plist->o_arname, plist->o_flags)) 
+         return(1);
+      ptemp = plist;
+      plist = plist->o_next;
+      free(ptemp);
+   }
+
+   for(uptr = unresolved; uptr != NULL; ) {                 // Process unresolved list
+      if(vflag > 1) printf("lookup(%s) => ",uptr->h_sym);
+      if((htemp = lookup(uptr->h_sym)) != NULL) {
+         if(vflag > 1)
+            printf(" %s in %s\n", isglobal(htemp->h_type) ? "global" : "common", htemp->h_ofile->o_name);
+         htemp->h_ofile->o_flags |= O_USED;
+         if(prev == NULL) {
+            unresolved = uptr->h_next;
+            free(uptr);
+            uptr = unresolved;
+         } else {
+            prev->h_next = uptr->h_next;
+            free(uptr);
+            uptr = prev->h_next;
+         }
+      } else {
+         printf("NULL\n");
+         prev = uptr;
+         uptr = uptr->h_next;
+      }
+   }
+
+   return(0);
+}
+
+//
+// --- Extract Filename from Path ------------------------------------------------------------------
+//
+
+char *path_tail(char *name) {
+   char *temp;                                              // Temporary pointer
+
+   temp = max(strrchr(name,'/'), max(strrchr(name,':'), strrchr(name, 92)));
+   if(temp == NULL) temp = (name - 1);
+   return(temp + 1);
+}
+
+//
+// --- Add Input File to Processing List -----------------------------------------------------------
+//
+
+
+int pladd(char *ptr, char *fname) {
+   if(plist == NULL) {  
+      plist = new_ofile();                                  // First time object record allocation
+      plast = plist;                                        // Update last object record pointer
+   } else {
+      plast->o_next = new_ofile();                          // Next object record allocation
+      plast = plast->o_next;                                // Update last object record pointer
+   }
+
+   if(plast == NULL) {                                
+      printf("Out of memory.\n");                           // Error if memory allocation fails
+      return(1);
+   }
+    
+   if(strlen(path_tail(fname)) > FNLEN-1) {                 // Error on excessive filename length
+      printf("File name too long: %s (sorry!)\n",fname);
+      return(1);
+   }
+
+   strcpy(plast->o_name, path_tail(fname));                 // Store filename, not path
+   *plast->o_arname = 0;                                    // No archive name for this file
+   plast->o_image = ptr;                                    // Store data pointer
+   plast->o_flags = O_USED;                                 // File is used
+   plast->o_next = NULL;                                    // Initialise next record pointer
+
+   return(0);                                               // Return without errors
+}
+
+// -------------------------------------------------------------------------------------------------
+// Process in Binary Include Files and Add them to the Processing List. This routine takes in the 
+// binary file and creates an 'object' file in memory. Sym1/Sym2 point to the start and end of data.
+//
+// Image size for include files is:
+// Header ....... 32 bytes
+// Data ......... dsize
+// Sym Fixups ... 2 * 12 bytes
+// Symbol Size .. 4 bytes (Value to include symbols and terminating null)
+// Symbols ...... (strlen(sym1) + 1) + (strlen(sym2) + 1)
+// Terminate .... 4 bytes (0x00000000)
+// -------------------------------------------------------------------------------------------------
+
+int doinclude(char *fname, int handle, char *sym1, char *sym2, int segment) {
+   long fsize, dsize, size;                                 // File, DATA segment and image sizes 
+   char *ptr, *sptr;                                        // Data pointers
+   int i;                                                   // Iterators
+   int sym1len = 0;                                         // Symbol 1 length
+   int sym2len = 0;                                         // Symbol 2 length
+   unsigned symtype = 0;
+
+   fsize = FSIZE(handle);                                   // Get size of include file
+   dsize = (fsize+secalign) & ~secalign;                         // Round up to a alignment boundary
+
+   sym1len = strlen(sym1) + 1;                              // Get sym1 length + null termination
+   sym2len = strlen(sym2) + 1;                              // Get sym2 length + null termination
+
+   size = 32 + dsize + 24 + 4 + sym1len + sym2len + 4;
+
+   // Use calloc so the header & fixups initialize to zero
+   if((ptr = calloc(size, 1L)) == NULL) {                   // Allocate object image memory
+      printf("Out of memory while including %s\n", fname);
+      close(handle);
+      return(1);
+   }
+
+   if(read(handle, ptr+32, fsize) != fsize) {               // Read in binary data
+      printf("File read error on %s\n", fname);
+      close(handle);
+      free(ptr);
+      return(1);
+   }
+   close(handle);                                           // Close file
+
+   
+   strcpy(obj_fname[obj_index], path_tail(fname));
+
+   // Build this image's dummy header 
+   putlong(ptr, 0x00000107);                                // Magic number
+   if(segment) {
+      putlong(ptr+4, dsize);                                // Text size 
+      putlong(ptr+8, 0L);                                   // Data size 
+      symtype = 0x05000000;
+      obj_segsize[obj_index][0] = dsize;
+      obj_segsize[obj_index][1] = 0;
+      obj_segsize[obj_index][2] = 0;
+   } else {
+      putlong(ptr+4, 0L);                                   // Text size 
+      putlong(ptr+8, dsize);                                // Data size 
+      symtype = 0x07000000;
+      obj_segsize[obj_index][0] = 0;
+      obj_segsize[obj_index][1] = dsize;
+      obj_segsize[obj_index][2] = 0;
+   }
+
+   obj_index++;                                             // Increment object count
+
+   putlong(ptr+12, 0L);                                     // BSS size 
+   putlong(ptr+16, 24);                                     // Symbol table size
+   putlong(ptr+20, 0L);                                     // Entry point
+   putlong(ptr+24, 0L);                                     // TEXT relocation size
+   putlong(ptr+28, 0L);                                     // DATA relocation size
+   
+   sptr = ptr + 32 + dsize;                                 // Set sptr to symbol table location
+
+   putlong(sptr,    4L);                                    // String offset of symbol1
+   putlong(sptr+4,  symtype);                               // Symbol type
+   putlong(sptr+8,  0x00000000);                            // Symbol has no value (START)
+   putlong(sptr+12, 4L + (sym2len-1));                      // String offset of symbol2
+   putlong(sptr+16, symtype);                               // Symbol type
+   putlong(sptr+20, dsize);                                 // Symbol is data size (END)
+
+   sptr = ptr + 32 + dsize + 24;                            // Set sptr to symbol table size loc
+
+   putlong(sptr, sym1len + 4L);                             // Size of symbol table
+
+   sptr = ptr + 32 + dsize + 24 + 4;                        // Set sptr to symbol table location
+
+   for(i = 0; i < (sym1len-1); i++)                         // Write symbol1 to string table
+      sptr[i] = *sym1++;     
+   sptr += (sym1len-1);                                     // Step past symbol string
+   *sptr = '\0';                                            // Terminate symbol string
+   sptr += 1;                                               // Step past termination
+   for(i = 0; i < (sym2len-1); i++)                         // Write symbol2 to string table
+      sptr[i] = *sym2++;     
+   sptr += (sym2len-1);                                     // Step past symbol string
+   *sptr = '\0';                                            // Terminate symbol string
+   sptr += 1;                                               // Step past termination
+   
+   putlong(sptr, 0L);                                       // Terminating long for object file
+
+   return pladd(ptr,fname);
+}
+
+//
+// -------------------------------------------------------------------------------------------------
+// Takes a file name, gets in its image, puts it on plist.  The image may already be in memory:  if 
+// so, the ptr arg is non-null.  If so, the file is already closed. Note that the file is already 
+// open (from dofile()). RETURNS a pointer to the OFILE structure for this file, so you can diddle 
+// its flags (dofile sets O_USED for files on the command line).
+// -------------------------------------------------------------------------------------------------
+//
+
+int doobject(char *fname, int fd, char *ptr) {
+   long size;                                               // File size
+    
+   if(ptr == NULL) {                                        
+      size = FSIZE(fd);                                     // Get size of input object file
+      if((ptr = malloc(size)) == NULL) {                    // Allocate memory for file data
+         printf("Out of memory while processing %s\n", fname);
+         close(fd);                                         // Close and error
+         return(1);
+      }
+      if(read(fd, ptr, size) != size) {                     // Read in file data
+         printf("File read error on %s\n", fname);
+         close(fd);                                         // Close, free memory and error
+         free(ptr);
+         return(1);
+      }
+
+      strcpy(obj_fname[obj_index], fname);
+      obj_segsize[obj_index][0] = (getlong(ptr + 4) + secalign) & ~secalign;
+      obj_segsize[obj_index][1] = (getlong(ptr + 8) + secalign) & ~secalign;
+      obj_segsize[obj_index][2] = (getlong(ptr + 12) + secalign) & ~secalign;
+      obj_index++;
+
+      close(fd);                                            // Close file
+   }    
+
+   // Now add this image to the list of pending ofiles (plist) 
+   // This routine is shared by doinclude after it builds the image
+   return(pladd(ptr, fname));
+}
+
+//
+// --- Process In Outstanding Object Files ---------------------------------------------------------
+//
+
+int flush_handles(void) {
+   int i;                                                   // Iterator
+   char magic[4];                                           // Magic header number
+  //  unsigned test;
+   for(i = 0; i < (int)hd; i++) {                           // Process all handles
+      if(vflag == 1) {                                      // Verbose mode information
+         printf("Read file %s%s\n", name[i], hflag[i] ? " (include)" : "");
+      }
+      if(!hflag[i]) {                                       // Attempt to read file magic number
+         // OBJECT FILES
+         if(read(handle[i],magic,4) != 4) {
+            printf("Error reading file %s\n", name[i]);
+            close(handle[i]);                               // Close file and error
+            return(1);
+         }
+               
+         lseek(handle[i], 0L, 0);                           // Reset to start of input file 
+//             test = getlong(magic); printf("Magic Number is 0x%08X\n", test);
+         if(getlong(magic) == 0x00000107) {                 // Look for SMAC/MAC object files
+            if(doobject(name[i], handle[i], 0L))            // Process input object file
+               return(1); 
+         } else {
+            printf("%s is not a supported object file\n", name[i]);
+            close(handle[i]);                               // Close file and error
+            return(1);
+         }
+      } else {
+         // INCLUDE FILES
+         // If hflag[i] is 1, include this in the data segment; if 2, put in in text segment
+         if(doinclude(name[i], handle[i], hsym1[i], hsym2[i], hflag[i]-1)) 
+            return(1);
+      }
+   }
+    
+   for(i = 0; i < (int)hd; i++) {                           // Free include, symbol & object handles
+          free(name[i]); 
+          if(hflag[i]) {
+         free(hsym1[i]);
+         free(hsym2[i]);
+      }
+   }
+    
+   hd = 0;                                                  // Reset next handle indicator
+
+   return(0);                                               // Return
+}
+
+//
+// --- Load newargv with Pointers to Arguments Found in the Buffer ---------------------------------
+//
+
+int parse(char *buf, char *newargv[]) {
+   int i = 1;
+    
+   if(vflag) {
+      printf("begin parsing\n");
+   }
+   while(1) {
+      while(*buf && strchr(",\t\n\r\14 ", *buf)) buf++;
+
+      /* test for eof */
+      if(*buf == '\0' || *buf == 26) {
+         if(i == 0) {
+            printf("No commands in command file\n");
+            return(-1);
+         } else {
+            return(i);
+         }
+      }
+
+      /* test for comment */
+      if(*buf == '#') {
+         /* found a comment; skip to next \n and start over */
+         while(*buf && *buf != '\n') buf++;
+         continue;
+      }
+
+      if(i == MAXARGS) {
+         printf("Too many arguments in command file\n");
+         return(-1);
+      }
+      newargv[i] = buf;
+      while(!strchr(",\t\n\r\14 ", *buf)) {
+         if(*buf == '\0' || *buf == 26) {
+            printf("Finished parsing %d args\n", i);
+            return(i);
+         }
+         buf++;
+      }
+      *buf++ = '\0';
+      if(vflag) {
+         printf("argv[%d] = \"%s\"\n",i,newargv[i]);
+      }
+      i++;
+   }
+}
+
+//
+// --- Process in a Link Command File -----------------------------------------
+//
+
+int docmdfile(char * fname)
+{
+   int fd;                                                  // File descriptor
+   unsigned size;                                           // Command file size
+   char * ptr;                                               // Pointer
+   int newargc;                                             // New argument count
+   char * (*newargv)[];                                      // New argument value array
+
+   if (vflag > 1)
+          printf("docmdfile(%s)\n", fname);          // Verbose information
+
+   // Allocate memory for new argument values
+   newargv = malloc((long)(sizeof(char *) * MAXARGS));
+
+   if (!newargv)
+   {
+      printf("Out of memory.\n");
+      return(1);
+       }
+
+   // Attempt to open and read in the command file
+   if (fname)
+   { 
+      if ((fd = open(fname, _OPEN_FLAGS)) < 0)
+         {
+         printf("Cannot open command file %s.\n", fname);
+         return(1);
+      }
+
+      size = FSIZE(fd);
+
+         if ((ptr = malloc(size + 1)) == NULL)
+         {
+         printf("Out of memory.\n");
+         close(fd);
+         return(1);
+      }
+
+      if (read(fd, ptr, size) != (int)size)
+         {
+         printf("Read error on command file %s.\n", fname);
+         close(fd);
+         return(1);
+      }
+
+      *(ptr + size) = 0;                                    // Null terminate the buffer
+      close(fd);
+   }
+   else
+   {
+      printf("No command filename specified\n");
+      return(1);
+   }
+
+   // Parse the command file
+   if ((newargc = parse(ptr, *newargv)) == -1)
+   {
+      return(1);
+   }
+
+   // Process the inputted flags
+   if (doargs(newargc, *newargv))
+   {
+      printf("docmdfile: doargs returns TRUE\n");
+      return(1);
+   }
+   
+   free(ptr);
+   free(newargv);
+
+   return(0);
+}
+
+//
+// --- Take an Argument List and Parse the Command Line -----------------------
+//
+
+int doargs(int argc, char * argv[])
+{
+   int i = 1;                                               // Iterator
+   int c;                                                   // Command line character
+   char * ifile, * isym;                                        // File name and symbol name for -i 
+
+   while(i < argc)
+   {                                        // Parse through option switches & files
+      if (argv[i][0] == '-')
+         {                               // Process command line switches
+         if (!argv[i][1])
+                { 
+            printf("Illegal option argument: %s\n\n", argv[i]);
+            display_help();
+                     return(1);
+         }
+
+         c = argv[i++][1];                                  // Get next character in command line
+
+         switch (c)
+                {                                        // Process command line switch
+            case '?':                                       // Display usage information
+            case 'h':
+                       case 'H':
+               display_version();
+               display_help();
+               return(1);
+            case 'a':
+                       case 'A':                                  // Set absolute linking on 
+               if (aflag)
+                                  warn('a', 1);
+
+                          if (i + 2 >= argc)
+                          {
+                  printf("Not enough arguments to -a\n");
+                  return(1);
+               }
+
+               aflag = 1;                                   // Set abs link flag
+               // Segment order is TEXT, DATA, BSS
+               // Text segment can be 'r', 'x' or a value 
+               ttype = 0;
+
+                          if ((*argv[i] == 'r' || *argv[i] == 'R') && !argv[i][1])
+                          {
+                  ttype = -1;                               // TEXT segment is relocatable
+               }
+               else if ((*argv[i] == 'x' || *argv[i] == 'X'))
+                          {
+                  printf("Error in text-segment address: cannot be contiguous\n");
+                  return(1);
+               }
+               else if ((ttype = 0), getval(argv[i], &tval))
+                          {
+                  printf("Error in text-segment address: %s is not 'r', 'x' or an address.", argv[i]);
+                  return(1);
+               }
+
+               i++;
+               // Data segment can be 'r', 'x' or a value 
+               dtype = 0;
+
+                          if ((*argv[i] == 'r' || *argv[i] == 'R') && !argv[i][1])
+                          {
+                  dtype = -1;                               // DATA segment is relocatable
+               }
+               else if ((*argv[i] == 'x' || *argv[i] == 'X'))
+                          {
+                  dtype = -2;                               // DATA follows TEXT
+               }
+               else if ((dtype = 0), getval(argv[i],&dval))
+                          {
+                  printf("Error in data-segment address: %s is not 'r', 'x' or an address.", argv[i]);
+                  return(1);
+               }
+
+               i++;
+               btype = 0;
+
+                          // BSS segment can be 'r', 'x' or a value 
+               if ((*argv[i] == 'r' || *argv[i] == 'R') && !argv[i][1])
+                          {
+                  btype = -1;                               // BSS segment is relocatable
+               }
+               else if ((*argv[i] == 'x' || *argv[i] == 'X'))
+                          {
+                  btype = -3;                               // BSS follows DATA
+               }
+               else if ((btype = 0), getval(argv[i],&bval))
+                          {
+                  printf("Error in bss-segment address: %s is not 'r', 'x[td]', or an address.", argv[i]);
+                  return(1);
+               }
+
+               i++;
+               break;
+            case 'b':
+                       case 'B':                                  // Don't remove muliply defined locals
+               if (bflag)
+                                  warn('b', 1);
+
+                          bflag = 1;
+               break;
+            case 'c':
+                       case 'C':                             // Process a command file
+               if (i == argc)
+                          {
+                  printf("Not enough arguments to -c\n");
+                  return(1);
+               }
+
+               if (docmdfile(argv[i++]))
+                          {
+                  return(1);
+               }
+
+               break;
+            case 'd':
+                       case 'D':                                  // Wait for "return" before exiting 
+               if (dflag)
+                                  warn('d', 0);
+
+                          dflag = 1;
+               waitflag = 1;
+               break;
+            case 'e':
+                       case 'E':                             // Output COFF (absolute only)
+               cflag = 1;
+               break;
+            case 'g':
+                       case 'G':                             // Output source level debugging
+               printf("\'g\' flag not currently implemented\n");
+               gflag = 0;
+               /*
+               if(gflag) warn('g', 1);
+               gflag = 1;
+               */
+               break;
+            case 'i':
+                       case 'I':                             // Include binary file
+               if (i + 2 > argc)
+                          {
+                  printf("Not enough arguments to -i\n");
+                  return(1);
+               }
+
+               ifile = argv[i++];
+               isym = argv[i++];
+                          
+               if ((argv[i-3][2] == 'i') || (argv[i-3][2] == 'I'))
+                          {   // handle -ii (No truncation)
+                  if (!cflag)
+                                         printf("warning: (-ii) COFF format output not specified\n");
+               }
+               else
+                          {                                     // handle -i (Truncation)
+                  if (strlen(isym) > 7)
+                                         isym[7] = '\0';
+               }
+
+               // Place include files in the DATA segment only
+               if (dofile(ifile, DSTSEG_D, isym))
+                                  return(1);
+
+                          break;
+            case 'l':
+                       case 'L':                             // Add local symbols
+               if (lflag)
+                                  warn('l', 1);
+
+                          lflag = 1;
+               break;
+            case 'm':
+                       case 'M':                             // Produce load symbol map
+               if (mflag)
+                                  warn('m', 1);
+
+                          mflag = 1;
+               break;
+            case 'n':
+                       case 'N':                             // Output no header to .abs file
+               if (noheaderflag)
+                                  warn('n', 1);
+
+                          noheaderflag = 1;
+               break;
+            case 'o':
+                       case 'O':                                  // Specify an output file 
+               if (oflag)
+                                  warn('o', 1);
+
+                          oflag = 1;
+
+                          if (i >= argc)
+                          {
+                  printf("No output filename following -o switch\n");
+                  return(1);
+               }
+
+               if (strlen(argv[i]) > FARGSIZE - 5)
+                          {
+                  printf("Output file name too long (sorry!)\n");
+                  return(1);
+               }
+
+               strcpy(ofile, argv[i++]);
+               break;
+            case 'r':
+                       case 'R':                             // Section alignment size
+               if (rflag)
+                                  warn('r', 1);
+
+                          rflag = 1;
+
+                          switch (argv[i-1][2])
+                          {
+                  case 'w': case 'W': secalign = 1;  break; // Word alignment
+                  case 'l': case 'L': secalign = 3;  break; // Long alignment
+                  case 'p': case 'P': secalign = 7;  break; // Phrase alignment
+                  case 'd': case 'D': secalign = 15; break; // Double phrase alignment
+                  case 'q': case 'Q': secalign = 31; break; // Quad phrase alignment
+                  default:            secalign = 7;  break; // Default phrase alignment
+               }
+
+               break;
+            case 's':
+                       case 'S':                             // Output only global symbols
+               if (sflag)
+                                  warn('s', 1);
+
+                          sflag = 1;
+               break;
+            case 'v':
+                       case 'V':                                  // Verbose information
+               if (!vflag && !versflag)
+                          {
+                  display_version();
+               }
+
+               vflag++;
+               break;
+            case 'z':
+                       case 'Z':                                  // Suppress banner flag 
+               if (zflag)
+                                  warn('z', 1);
+
+                          zflag = 1;
+               break;
+            default:
+               printf("unknown option argument `%c'\n", c);
+               return(1);
+         }
+      }
+      else
+         {                                              // Not a switch, then process as a file
+         if (dofile(argv[i++], 0, NULL))
+                        return(1);
+      }
+
+   }
+
+   if (!oflag && vflag)
+   {
+      strcpy(ofile, "output");
+      printf("Output file is %s[.ext]\n", ofile);
+   }
+
+   if (oflag && vflag)
+          printf("Output file is %s\n", ofile);
+
+   if (sflag)
+          lflag = 0;
+
+   return 0;                                               // No problems encountered
+}
+
+
+//
+// --- Display Version Information --------------------------------------------
+//
+void display_version(void)
+{
+       if (displaybanner)// && vflag)
+       {
+               printf("\nReboot's Linker for Atari Jaguar\n"); 
+               printf("Copyright (c) 199x Allan K. Pratt, 2011 Reboot\n"); 
+               printf("V%i.%i.%i %s (%s)\n\n", MAJOR, MINOR, PATCH, __DATE__, PLATFORM);
+       }
+}
+
+
+//
+// --- Display Command Line Help -----------------------------------------------
+//
+void display_help(void)
+{
+       printf("Usage:\n");
+       printf("    %s [-options] file(s)\n", cmdlnexec);
+       printf("\n");
+       printf("Options:\n");
+       printf("   -? or -h                display usage information\n");
+       printf("   -a <text> <data> <bss>  output absolute file\n");
+       printf("                           hex value: segment address\n");
+       printf("                           r: relocatable segment\n");
+       printf("                           x: contiguous segment\n");
+       printf("   -b                      don't remove multiply defined local labels\n");
+       printf("   -c <fname>              add contents of <fname> to command line\n");
+       printf("   -d                      wait for key after link\n");
+       printf("   -e                      output COF absolute file\n");
+       printf("   -g                      output source-level debugging\n");
+       printf("   -i <fname> <label>      incbin <fname> and set <label>\n");
+       printf("   -l                      add local symbols\n");
+       printf("   -m                      produce load symbols map\n");
+       printf("   -n                      output no file header to .abs file\n");
+       printf("   -o <fname>              set output name\n");
+       printf("   -r<size>                section alignment size\n");
+       printf("                           w: word (2 bytes)\n");
+       printf("                           l: long (4 bytes)\n");
+       printf("                           p: phrase (8 bytes, default alignment)\n");
+       printf("                           d: double phrase (16 bytes)\n");
+       printf("                           q: quad phrase (32 bytes)\n");
+       printf("   -s                      output only global symbols\n");
+       printf("   -v                      set verbose mode\n");
+       printf("   -z                      suppress banner\n");
+       printf("\n\n");
+}
+
+
+//
+// --- Application Exit -------------------------------------------------------
+//
+void rln_exit(void)
+{
+       char tempbuf[128];
+
+       // Display link status if verbose mode
+       if (vflag)
+               printf("Link %s.\n", errflag ? "aborted" : "complete");
+
+       // Wait for return key if requested
+       if (waitflag)
+       {
+               printf("\nPress the <return> key to continue. ");
+               fgets(tempbuf, 128, stdin);
+       }
+
+       exit(errflag);
+}
+
+
+//
+// --- Determine Processor Endianess ------------------------------------------
+//
+int get_endianess(void)
+{
+       int i = 1;
+       char * p = (char *)&i;
+
+       if (p[0] == 1)
+               return 0;               // LITTLE
+
+       return 1;                       // BIG
+}
+
+
+//
+// --- Application Code Starts Here -------------------------------------------
+//
+int main(int argc, char * argv[])
+{
+   char * s = NULL;                                          // String pointer for "getenv"
+   struct HREC * utemp;                                      // Temporary hash record pointer 
+   struct OHEADER * header;                                  // Pointer to output header structure
+
+   endian = get_endianess();                                // Get processor endianess
+   cmdlnexec = argv[0];                                     // Obtain executable name
+   s = getenv("RLNPATH");
+
+   if(s)                                                    // Attempt to obtain env variable
+      strcpy(libdir, s);                                    // Store it if found
+
+   if (doargs(argc, argv))
+   {                                 // Parse the command line
+      errflag = 1;
+          rln_exit();
+   }
+
+   if (!zflag && !vflag)
+   {
+      display_version();                                    // Display version information
+      versflag = 1;                                           // We've dumped the version banner 
+   }
+
+   if (flush_handles())
+   {                                    // Process in specified files/objects
+      errflag = 1;
+      rln_exit();
+   }
+
+   if (dolist())
+   {                                           // Remove elements from unresolved list
+      errflag = 1;
+      rln_exit();
+   }
+
+   if (olist == NULL)
+   {                                      // Check that there is something to link
+      printf("No object files to link.\n\n");
+      errflag = 1;
+      rln_exit();
+   }
+
+   if (unresolved != NULL)
+   {                                 // Report unresolved externals
+      printf("UNRESOLVED SYMBOLS\n");
+
+      if (uflag < 2)
+      {                                       // Don't list them if two -u's or more 
+         utemp = unresolved;
+
+         while (utemp != NULL)
+         {
+            printf("\t%s (",utemp->h_sym);
+            put_name(utemp->h_ofile);
+            printf(")\n");
+            utemp = utemp->h_next;
+         }
+      }
+
+      if (!uflag)
+      {
+         errflag = 1;
+         rln_exit();
+      }
+   }
+
+   if ((header = make_ofile()) == NULL)
+   {                    // Make one output file from input objs
+      errflag = 1;
+      rln_exit();
+   }
+
+   if (pflag)
+   {                                              // Partial linking
+      printf("TO DO:Partial linking\n");
+      errflag = 1;
+   }
+   else if (!aflag)
+   {                                     // Relocatable linking
+      printf("TO DO:Relocatable linking\n");
+      errflag = 1;
+   }
+   else
+   {                                                 // Absolute linking
+      if (vflag)
+      {
+         printf("Absolute linking ");
+
+         if (cflag)
+           printf("(COF)\n"); 
+         else
+           printf("(ABS)\n");
+      }
+
+      if (vflag > 1)
+        printf("Header magic is 0x%04X\n", (unsigned int)header->magic);
+
+      if (write_ofile(header))
+        errflag = 1;
+   }
+
+   if (mflag)                                                // Display the loaded symbols map
+      if (write_map(header))
+        errflag = 1;
+
+   if (vflag)
+   {                                             // Display segment size summary
+      printf("\n");
+      printf("+---------+----------+----------+----------+\n");
+      printf("| Segment |     TEXT |     DATA |      BSS |\n");
+      printf("| Sizes   |----------+----------+----------|\n");
+      printf("| (Hex)   | %8X | %8X | %8X |\n", (unsigned int)header->tsize, (unsigned int)header->dsize, (unsigned int)header->bsize);
+      printf("+---------+----------+----------+----------+\n\n");
+   }
+
+   free(header);                                            // Free allocated memory
+   rln_exit();                                              // Perform application exit
+}
diff --git a/rln.h b/rln.h
new file mode 100644 (file)
index 0000000..09bf2af
--- /dev/null
+++ b/rln.h
@@ -0,0 +1,261 @@
+///////////////////////////////////////////////////////////////////////////////
+// RLN - Reboot's Linker for the Atari Jaguar Console System
+// RLN.H - Application Header
+// Copyright (C) 199x Allan K. Pratt, 2011 Reboot & Friends
+
+#ifndef __RLH_H__
+#define __RLH_H__
+
+// --- Required Include Files ----------------------------------------------------------------------
+
+
+// --- Macro Definitions ---------------------------------------------------------------------------
+
+// Requirements for Windows Compilation
+
+#ifdef WIN32
+//#define _OPEN_FLAGS  _O_BINARY|_O_RDWR
+#define _OPEN_FLAGS  _O_BINARY|_O_RDONLY
+#define _BACKSLASH   '\\'
+#ifdef _MSC_VER
+   #if _MSC_VER > 1000
+      #pragma warning(disable:4996)
+   #endif
+#endif
+#include <io.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <ctype.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <setjmp.h>
+#endif
+
+// Requirements for Mac OS-X or Linux Compilation
+
+#ifdef __GCCUNIX__
+//#define _OPEN_FLAGS  O_RDWR
+#define _OPEN_FLAGS  O_RDONLY
+#define _BACKSLASH   '/'
+#include <sys/fcntl.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <ctype.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <setjmp.h>
+#include <unistd.h>
+#endif
+
+#define MAJOR        1                                      // Major version number
+#define MINOR        0                                      // Minor version number
+#define PATCH        1                                      // Patch release number
+
+#ifdef WIN32
+#define PLATFORM     "Win32"                                // Release platform - Windows
+#else 
+#ifdef __GCCUNIX__
+#define PLATFORM     "OSX/Linux"                            // Release platform - MAC OSX or Linux
+#else
+#define PLATFORM     "Unknown"                              // Release platform - Not Specified 
+#endif
+#endif
+
+// Command link flag, warning macro
+#define warn(x, f) printf("Warning: repeated flag `%c'%s\n", x, f ? "; previous one(s) ignored." : ".")
+
+// Macro for max: good because longs, shorts, or pointers can be compared
+#ifndef max
+#define max(a,b) ((a) > (b) ? (a) : (b))
+#endif // max
+
+// Macro to swap the 16-bit words of a 32-bit integer
+#define _SWAPWORD(x) (((unsigned)(x) >> 16) | ((unsigned)(x) << 16)) 
+
+#define FARGSIZE     1024                                   // Number of chars in filename argument
+#define FNLEN        1024                                   // Size of a file name 
+#define NHANDLES     256                                    // Number of open file handles at once 
+#define OST_BLOCK    0x400000                               // Output symbol table block (4MB)
+#define DSTSEG_D     1                                      // Include file destination seg (DATA)
+#define DSTSEG_T     2                                      // Include file destination seg (TEXT)
+#define MAXARGS 256                                         // Max number of args in a command file
+
+// --- Headers -------------------------------------------------------------------------------------
+// Most of these structures reflect the actual format of the object in question, on a 68000: char 
+// means one byte, int means two bytes, long means four.  If the host machine doesn't have this 
+// same format (like a VAX), you will have to read the file into a buffer and stuff the values into 
+// the structure (see slongio.c).
+
+struct OHEADER
+{
+   long magic;                                                        // 0x0107 for .o, 0x601b for abs
+   long tsize;
+   long dsize;
+   long bsize;
+   long ssize;
+   union {
+      struct {                                                        // For .o 
+         long tsize;                                        // Text relocation size
+         long dsize;                                        // Data relocation size
+         char reserved[12];
+      } reloc;
+      struct {                                                        // For .abs 
+         long stksize;                                          // Unused 
+         long tstart;                                       // Start of TEXT 
+         long rbflag;                                        // -1 if no fixups at all 
+         long dstart;                                       // Start of DATA 
+         long bstart;                                       // Start of BSS
+      } abs;
+   } absrel;
+   char *ostbase;                                           // Base of output symbol table 
+   long fsize;                                              // Length of fixups
+   char *fixups;                                            // Start of fixups 
+};
+
+#define new_oheader()   (struct OHEADER *)malloc((long)sizeof(struct OHEADER))
+
+struct ARHEADER
+{
+   char a_fname[14];
+   long a_modti;
+   char a_userid;
+   char a_gid;
+   int a_fimode;
+   long a_fsize;
+   int reserved;                                            // Two bytes zeroes btw header & file 
+};
+
+#define new_arheader()  (struct ARHEADER *)malloc((long)sizeof(struct ARHEADER))
+
+// --- Object File Structure and Related Items -----------------------------------------------------
+
+struct OFILE
+{
+   char o_name[FNLEN];                                      // Fixed-length names
+   char o_arname[FNLEN];                                    // Name of archive this is from
+   struct OFILE *o_next;                                    // Next object file
+   long o_tbase, o_dbase, o_bbase;                          // Computed bases for this ofile
+   int o_symstart;                                          // First sym in image is nth in out
+   int o_flags;                                             // Flags (see O_*)
+   struct OHEADER o_header;                                 // Header of this file
+   char *o_image;                                           // Image of this file
+};
+
+#define new_ofile()  (struct OFILE *)malloc((long)sizeof(struct OFILE))
+
+// Flags in an Object File's o_flags field
+// O_USED: means this ofile is used or is on the command line or in a -x 
+#define O_USED       0x0001
+#define O_ARCHIVE    0x0002                                 // This is a dummy archive entry
+
+// --- Symbol Record -------------------------------------------------------------------------------
+
+// SYMREC: Used by builddir for the lists of exports and imports, and by the linker for the output
+// symbol table (that's why there are type and value fields, unused in builddir)
+
+#define SYMLEN       100                                    // Symbol name size (incl null)
+
+struct SYMREC
+{
+   char s_name[SYMLEN];                                     // Including null terminator 
+   int s_type;
+   long s_value;
+   struct SYMREC *s_next;
+};
+
+#define new_symrec() (struct SYMREC *)malloc((long)sizeof(struct SYMREC))
+
+// --- Hash Record ---------------------------------------------------------------------------------
+
+// HREC: One item in a hash bucket, including a link to the next item. Commons and Globals share a 
+// hash table, but their value fields are interpreted differently.  
+
+struct HREC
+{
+   char h_sym[SYMLEN];
+   struct HREC *h_next;
+   struct OFILE *h_ofile;
+   long h_value;
+   int h_type;
+};
+
+#define new_hrec()   (struct HREC *)malloc((long)sizeof(struct HREC))
+
+#define NBUCKETS     1024                                   // Number of hash buckets
+
+// Bit definitions for the type field of a symbol.
+//
+// There is a special case for the linker here: the bit T_OST is a flag
+// meaning that the symbol's value field contains an INT (in host-machine
+// format, in the first two bytes of the field) which is the index of the
+// symbol in the output symbol table.
+//
+// If that field is -1, it means you have to look this symbol up in the
+// ost to get its index.  This happens when the symbol was extern to this
+// module and defined by a LATER module.
+//
+// The upshot is that a symbol which isn't in the ost has its type & value
+// fields intact, while a symbol which is in the ost has T_OST set and
+// its index in its value field (or -1 if you have to look it up).
+// When producing the output fixups, you either output a symbol fixup with
+// the new index (for a partial link), or resolve the symbol based on its
+// type & value from the output symbol table.
+
+#define ABST_DEFINED    0x8000
+#define ABST_EQUATED    0x4000
+#define ABST_GLOBAL     0x2000
+#define ABST_REGISTER  0x1000
+#define ABST_EXTERN     0x0800
+#define ABST_DATA       0x0400 /* data-based relocatable */
+#define ABST_TEXT       0x0200 /* text-based relocatable */
+#define ABST_BSS        0x0100 /* bss-based relocatable  */
+#define ABST_FILE       0x0080                                    // file symbol 
+#define ABST_ARCHIVE    0x0040                                    // only when FILE set: archive file or no 
+#define ABST_OST        0x0001                                    // private: "symbol is in ost": see above 
+#define T_COMMON       (T_GLOBAL | T_EXTERN)
+#define T_SEG          (T_DATA | T_TEXT | T_BSS)                 // segment bits 
+
+// Symbol Table - Type Definitions
+
+#define T_UNDF          0x00000000     // Undefined Symbol
+#define T_EXT           0x01000000     // External Bit, OR\92ed In
+#define T_ABS           0x02000000     // Absolute Symbol
+#define T_TEXT          0x04000000     // TEXT Segment
+#define T_DATA          0x06000000     // DATA Segment
+#define T_BSS           0x08000000     // BSS Segment
+
+// These macros are used with the TYPE field of a SYMBOL.
+
+#define iscommon(type) (((type) & T_EXT) == T_EXT)
+#define isglobal(type) (((type) & T_EXT) == T_EXT)
+#define isextern(type) (((type) & T_EXT) == T_EXT)
+#define islocal(type)  (((type) & T_EXT) == 0)
+
+// This macro is used to compare two symbols for equality. It depends on
+// symcopy remaining as it is (copies two longs plus a null)
+
+#define symcmp(a,b) ((*(long *)(a) == *(long *)(b)) && \
+                             (*(long *)((a) + sizeof(long)) == \
+                             *(long *)((b) + sizeof(long))))
+
+// --- Function Prototypes -------------------------------------------------------------------------
+
+int doargs(int, char *[]);
+char *make_string(char *);
+void put_name(struct OFILE *);
+int flush_handles(void);
+void symcopy(char *, char *);
+int ost_add(char *,int, long);
+int add_fixup(long);
+void display_help(void);
+void display_version(void);
+int pladd(char *, char *);
+char *path_tail(char *);
+int dolist(void);
+int segmentpad(FILE *, long, int);
+int ost_lookup(char *);
+
+#endif // __RLH_H__