//
#include "rln.h"
+//#include <assert.h>
unsigned errflag = 0; // Error flag, goes TRUE on error
unsigned waitflag = 0; // Wait for any keypress flag
unsigned vflag = 0; // Verbose flag
unsigned wflag = 0; // Show warnings flag
unsigned zflag = 0; // Suppress banner flag
-unsigned pflag, uflag; // Unimplemented flags
+unsigned pflag = 0, uflag = 0; // 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
// For this object file, add symbols to the output symbol table after
// relocating them. Returns TRUE if OSTLookup returns an error (-1).
//
-int DoSymbol(struct OFILE * ofile)
+int DoSymbols(struct OFILE * ofile)
{
- int type; // Symbol type
- long value; // Symbol value
- int index; // Symbol index
- int j; // Iterator
- struct HREC * hptr; // Hash table pointer for globl/extrn
- char sym[SYMLEN]; // String for symbol name/hash search
+ int type;
+ long value;
+ int index;
+ int j;
+ struct HREC * hptr;
+ unsigned tsoSave, dsoSave, bsoSave;
// Point to first symbol record in the object file
char * symptr = (ofile->o_image + 32
if (ssidx == -1)
{
- printf("DoSymbol(): Cannot get object file segment size: %s\n", ofile->o_name);
+ printf("DoSymbols(): Object file missing from obj_fname: %s\n",
+ ofile->o_name);
return 1;
}
- // Process each record in the symbol table
+ // Save segment vars, so we can restore them if needed
+ tsoSave = tsegoffset, dsoSave = dsegoffset, bsoSave = bsegoffset;
+
+ // Process each record in the object's symbol table
for(; symptr!=symend; symptr+=12)
{
index = getlong(symptr + 0); // Obtain symbol string index
value = getlong(symptr + 8); // Obtain symbol value
// Global/External symbols have a pre-processing stage
+ // N.B.: This destroys the t/d/bsegoffset discovered above. So if a
+ // local symbol follows a global/exported one, it gets wrong
+ // info! [Should be FIXED now]
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 = LookupHREC(sym);
+ // symbol.
+ hptr = LookupHREC(symend + index);
if (hptr == NULL)
{
- printf("DoSymbol() : Cannot determine symbol : %s\n", sym);
- return 1;
+ // Try to find it in the OST
+ int ostIndex = OSTLookup(symend + index);
+
+ if (ostIndex == -1)
+ {
+ printf("DoSymbols(): Symbol not found in hash table: '%s' (%s)\n", symend + index, ofile->o_name);
+ return 1;
+ }
+
+ // If the symbol is not in any .a or .o units, it must be one
+ // of the injected ones (_TEXT_E, _DATA_E, or _BSS_E), so skip
+ // it
+ continue;
}
// 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
+ // resulting COF file. This is effectively 'done again' only as we
// are working with a different object file.
ssidx = -1;
tsegoffset = dsegoffset = bsegoffset = 0;
if (ssidx == -1)
{
- printf("DoSymbol() : Cannot get object file segment size : %s\n", ofile->o_name);
+ printf("DoSymbols(): Object file missing from obj_fname: '%s:%s' symbol: '%s' (%s)\n",
+ hptr->h_ofile->o_name, hptr->h_ofile->o_arname,
+ symend + index, ofile->o_name);
return 1;
}
}
}
}
+ // If *not* a global/external, use the info from passed in object
+ else
+ tsegoffset = tsoSave, dsegoffset = dsoSave, bsegoffset = bsoSave;
// Process and update the value dependent on whether the symbol is a
// debug symbol or not
}
// Add to output symbol table if global/extern, or local flag is set
- if (lflag || !islocal(type))
+ if (isglobal(type) || lflag)
{
index = OSTAdd(symend + index, type, value);
if (index == -1)
+ {
+ printf("DoSymbols(): Failed to add symbol '%s' to OST!\n", symend + index);
return 1;
+ }
}
}
- // Increment DoSymbol() processsing
+ // Increment dosymi processsing
dosymi++;
return 0;
// Add all global and external symbols to the output symbol table
// [This is confusing--is it adding globals or locals? common == local!
// but then again, we see this in the header:
-// #define T_COMMON (T_GLOBAL | T_EXTERN)]
+// #define T_COMMON (T_GLOBAL | T_EXTERN) but that could be just bullshit.]
//
long DoCommon(void)
{
//if (hptr->h_ofile->isArchiveFile)
// continue;
+//Is this true? Couldn't an absolute be exported???
if (hptr->h_type == (T_EXT | T_ABS))
hptr->h_type = T_ABS; // Absolutes *can't* be externals
//
-// Add a Symbol's Name, Type, and Value to the OST.
-// Return the Index of the Symbol in OST, or -1 for Error.
+// Add a symbol's name, type, and value to the OST.
+// Returns the index of the symbol in OST, or -1 for error.
//
int OSTAdd(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
+ int slen = strlen(name);
- slen = strlen(name);
-
- // If the OST or OST String Table has not been initialised then do so
+ // If the OST or OST string table has not been initialised then do so
if (ost_index == 0)
{
- if ((ost = malloc(OST_BLOCK)) == NULL)
+ ost = malloc(OST_BLOCK);
+ oststr = malloc(OST_BLOCK);
+
+ if (ost == NULL)
{
- printf("OST memory allocation error (stringtable).\n");
+ printf("OST memory allocation error.\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)
+ if (oststr == NULL)
{
- printf("OST memory allocation error (string).\n");
+ printf("OSTSTR memory allocation error.\n");
return -1;
}
+ ost_ptr = ost; // Set OST start pointer
+ ost_end = ost + OST_BLOCK; // Set OST end pointer
+
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
else
{
// If next symbol record exceeds current allocation then expand symbol
- // table.
+ // table and/or symbol string table.
ost_offset_p = (ost_ptr - ost);
ost_offset_e = (ost_end - ost);
- // 3 x int (12)
+ // 3 x uint32_t (12 bytes)
if ((ost_ptr + 12) > ost_end)
{
-#warning "!!! Bad logic in realloc call !!!"
- if ((ost = realloc(ost, (ost_end + OST_BLOCK))) == NULL)
+ // We want to allocate the current size of the OST + another block.
+ ost = realloc(ost, ost_offset_e + OST_BLOCK);
+
+ if (ost == NULL)
{
printf("OST memory reallocation error.\n");
return -1;
ost_offset_p = (oststr_ptr - oststr);
ost_offset_e = (oststr_end - oststr);
+ // string length + terminating NULL + uint32_t (terminal long)
if ((oststr_ptr + (slen + 1 + 4)) > oststr_end)
{
-#warning "!!! Bad logic in realloc call !!!"
- if ((oststr = realloc(oststr, (oststr_end + OST_BLOCK))) == NULL)
+ oststr = realloc(oststr, ost_offset_e + OST_BLOCK);
+
+ if (oststr == NULL)
{
printf("OSTSTR memory reallocation error.\n");
return -1;
if ((type & 0xF0000000) && !gflag)
{
// Do nothing
+ return 0;
}
- else
- {
- ostresult = OSTLookup(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
+ // Get symbol index in OST, if any (-1 if not found)
+ ostresult = OSTLookup(name);
- putlong(ost_ptr + 4, type );
- putlong(ost_ptr + 8, value);
- ost_ptr += 12;
+ // 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
- // 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
- }
+ putlong(ost_ptr + 4, type);
+ putlong(ost_ptr + 8, value);
+ ost_ptr += 12;
- if (vflag > 1)
- {
- printf("OSTAdd: (%s), type=$%08X, val=$%08X\n", name, type, value);
- }
+ // 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++;
+ if (vflag > 1)
+ {
+ printf("OSTAdd: (%s), type=$%08X, val=$%08lX\n", name, type, value);
}
+
+// is ost_index pointing one past?
+// does this return the same regardless of if its ++n or n++?
+// no. it returns the value of ost_index *before* it's incremented.
+ return ++ost_index;
}
- // Not sure about this as it could affect return indices. Needed to stop
- // return error.
- return 0;
+ return ostresult;
}
//
// Return the index of a symbol in the output symbol table
+// N.B.: This is a 1-based index! (though there's no real reason for it to be)
//
int OSTLookup(char * sym)
{
//
// Add unresolved externs to the output symbol table
+// N.B.: Only adds unresolved symbols *if* they're not already in the OST
//
int DoUnresolved(void)
{
return 1;
if (vflag > 1)
- printf("DoUnresolved(): added %s\n", hptr->h_sym);
+ printf("DoUnresolved(): '%s' (%s:$%08X) in OST\n", hptr->h_sym, hptr->h_ofile->o_name, hptr->h_type);
struct HREC * htemp = hptr->h_next;
free(hptr);
//
int RelocateSegment(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
+ 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)
{
- // TEXT segment size plus padding
- pad = ((ofile->o_header.tsize + secalign) & ~secalign);
- textoffset += (ofile->o_header.tsize + (pad - ofile->o_header.tsize));
-
- if (vflag > 1)
- printf("RelocateSegment(%s, TEXT) : No Relocation Data\n", ofile->o_name);
-
+ // SCPCD : we should not increment the textoffset before the end of processing the object file, else data section will point to wrong textoffset
return 0;
}
// padding
if ((flag == T_DATA) && !ofile->o_header.absrel.reloc.dsize)
{
+ // SCPCD : the T_DATA is the last section of the file, we can now increment the textoffset, dataoffset and bssoffset
+
+ // TEXT segment size plus padding
+ pad = ((ofile->o_header.tsize + secalign) & ~secalign);
+ textoffset += (ofile->o_header.tsize + (pad - ofile->o_header.tsize));
+
+ if (vflag > 1)
+ printf("RelocateSegment(%s, TEXT) : No Relocation Data\n", ofile->o_name);
+
// DATA segment size plus padding
pad = ((ofile->o_header.dsize + secalign) & ~secalign);
dataoffset += (ofile->o_header.dsize + (pad - ofile->o_header.dsize));
case 0x00000200: // Absolute Value
break;
case 0x00000400: // TEXT segment relocation record
- if (flag == T_TEXT) // Is this a TEXT section record?
+ // SCPCD : the symbol point to a text segment, we should use the textoffset
newdata = tbase + textoffset + olddata;
- else
- newdata = tbase + dataoffset + olddata; // Nope, must be DATA section
break;
case 0x00000600: // DATA segment relocation record
}
// Update the COF segment offset allowing for the phrase padding.
- if (flag == T_TEXT)
+ // SCPCD : we should not increment the textoffset before the end of processing the object file, else data section will point to wrong textoffset
+ if (flag == T_DATA)
{
// TEXT segment plus padding
pad = ((ofile->o_header.tsize + secalign) & ~secalign);
textoffset += (ofile->o_header.tsize + (pad - ofile->o_header.tsize));
- }
- else
- {
+
// DATA segment plus padding
pad = ((ofile->o_header.dsize + secalign) & ~secalign);
dataoffset += (ofile->o_header.dsize + (pad - ofile->o_header.dsize));
//
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
+ int i;
+ char padarray[32];
+ char * padptr;
// Determine the number of padding bytes that are needed
long padsize = (segsize + secalign) & ~secalign;
//
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
strcat(ofile, ".o"); // Object files (partial linking etc)
}
- fd = fopen(ofile, "wb"); // Attempt to open output file
+ FILE * fd = fopen(ofile, "wb"); // Attempt to open output file
if (!fd)
{
- printf("Can't open output file %s\n", ofile); // Error opening output file
+ printf("Can't open output file %s\n", ofile);
return 1;
}
// 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)
+ 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
+ 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
+ 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
+ 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
+ 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
}
// Absolute (ABS) header
else
{
// 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
+ 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
+ symoffset = 36; // Update symbol offset
}
// Write the header, but not if noheaderflag
{
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;
+ if (fwrite(ost, (ost_ptr - ost), 1, fd) != 1)
+ goto werror;
+
+ if (fwrite(oststr, (oststr_ptr - oststr), 1, fd) != 1)
+ goto werror;
}
}
// Absolute (ABS) symbol/string table
else
{
// The symbol and string table have been created as part of the
- // DoSymbol() 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
+ // DoSymbols() 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
+ 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
+ // Skip debug symbols
if (type & 0xF0000000)
- continue; // Not doing debug symbols
+ continue;
- value = getlong((ost + (i * 12)) + 8); // Get symbol value
+ // Get symbol value
+ value = getlong((ost + (i * 12)) + 8);
slen = strlen(oststr + index);
// Get symbol string (maximum 8 chars)
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");
+ printf("warning (write_ofile): ABS, cannot determine symbol type ($%08X)\n", type);
type = 0;
break;
}
- putword(symbol + 8, abstype); // Write back new ABS type
- putlong(symbol + 10, value); // Write back value
+ 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
+ // Write symbol record
+ if (fwrite(symbol, 14, 1, fd) != 1)
+ goto werror;
}
}
}
//
-// Convert ASCII to hexadecimal
+// Stuff the (long) value of a string into the value argument. RETURNS TRUE if
+// the string doesn't parse. Parses only as a hexadecimal string.
//
-//int atolx(char * string, long * value)
-int atolx(char * string, int * value)
+int GetHexValue(char * string, int * value)
{
*value = 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, 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
//
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
+ unsigned tptr, dptr, bptr; // Bases in runtime model
+ int ret = 0; // Return value
+ struct OHEADER * header; // Output header pointer
// Initialize cumulative segment sizes
textsize = datasize = bsssize = 0;
// 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
+ struct OFILE * oprev = NULL; // Init previous obj file list ptr
+ struct OFILE * otemp = olist; // Set temp pointer to object file list
+ int i = 0;
while (otemp != NULL)
{
else
oprev->o_next = otemp->o_next;
- ohold = otemp;
+ struct OFILE * ohold = otemp;
if (!ohold->isArchiveFile)
free(ohold->o_image);
- free(ohold);
+ // Also need to remove them from the obj_* tables too :-P
+ // N.B.: Would probably be worthwhile to remove crap like this
+ // and stuff it into the OFILE structure...
+ if (wflag)
+ printf("»-> removing %s... (index == %i, len == %i)\n", obj_fname[i], i, obj_index - 1);
+
+ int k;
+
+ for(k=i; k<obj_index-1; k++)
+ {
+ memcpy(obj_fname[k], obj_fname[k + 1], FNLEN);
+ obj_segsize[k][0] = obj_segsize[k + 1][0];
+ obj_segsize[k][1] = obj_segsize[k + 1][1];
+ obj_segsize[k][2] = obj_segsize[k + 1][2];
+ }
+
+ obj_index--;
+ i--;
}
else
{
// Go to next object file list pointer
otemp = otemp->o_next;
+ i++;
}
// Update base addresses and create symbols _TEXT_E, _DATA_E and _BSS_E
tbase = tval;
- OSTAdd("_TEXT_E", 0x05000000, tval + textsize);
if (!dval)
{
// DATA follows TEXT
dbase = tval + textsize;
- OSTAdd("_DATA_E", 0x07000000, tval + textsize + datasize);
if (!bval)
- {
// BSS follows DATA
bbase = tval + textsize + datasize;
- OSTAdd("_BSS_E", 0x09000000, tval + textsize + datasize + bsssize);
- }
else
- {
- // BSS is independant of DATA
+ // BSS is independent of DATA
bbase = bval;
- OSTAdd("_BSS_E", 0x09000000, bval + bsssize);
- }
}
else
{
// DATA is independant of TEXT
dbase = dval;
- OSTAdd("_DATA_E", 0x07000000, dval + datasize);
if (!bval)
- {
// BSS follows DATA
bbase = dval + datasize;
- OSTAdd("_BSS_E", 0x09000000, dval + datasize + bsssize);
- }
else
- {
- // BSS is independant of DATA
+ // BSS is independent of DATA
bbase = bval;
- OSTAdd("_BSS_E", 0x09000000, bval + bsssize);
- }
}
+ OSTAdd("_TEXT_E", 0x05000000, tbase + textsize);
+ OSTAdd("_DATA_E", 0x07000000, dbase + datasize);
+ OSTAdd("_BSS_E", 0x09000000, bbase + bsssize);
+
// Place each unresolved symbol in the output symbol table
+ // N.B.: It only gets here to do this if user passes in -u flag
+ // [Only used here, once]
if (DoUnresolved())
return NULL;
// For each symbol, (conditionally) add it to the ost
// For ARCHIVE markers, this adds the symbol for the file & returns
// (Shamus: N.B. it does no such thing ATM)
- if (DoSymbol(otemp))
+ // [Only used here, once]
+ if (DoSymbols(otemp))
return NULL;
if (otemp->o_flags & O_ARCHIVE)
else
oprev->o_next = otemp->o_next;
- ohold = otemp;
+ struct OFILE * ohold = otemp;
if (ohold->o_image)
if (!ohold->isArchiveFile)
// 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
+ 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
int GetHash(char * s)
{
// For this to be consistent, the symbol MUST be zeroed out beforehand!
- char c[SYMLEN];
- memset(c, 0, SYMLEN);
- strcpy(c, s);
+ // N.B.: strncpy() pads zeroes for us, if the symbol is less than 15 chars.
+ char c[15];
+ strncpy(c, s, 15);
int i = (c[0] + c[1] + c[2] + c[3] + c[4] + c[5] + c[6] + c[7] + c[8]
+ c[9] + c[10] + c[11] + c[12] + c[13] + c[14]) % NBUCKETS;
}
-//
-// Add symbol to the hash table if it doesn't already exist, otherwise decide
-// what to do since it's already defined in another unit.
-//
-int DealWithSymbol(char * sym, long type, long value, struct OFILE * ofile)
-{
- if (vflag > 1)
- {
- printf("DealWithSymbol(%s,%s,%lx,", sym, ofile->o_name, value);
- printf("%x,%s)\n", (unsigned int)type, (isglobal(type) ? "GLOBAL" : "COMMON"));
- }
-
- struct HREC * hptr = LookupHREC(sym);
-
- if (hptr == NULL)
- return AddSymbolToHashList(&htable[GetHash(sym)], sym, ofile, value, type);
-
- // Symbol is already in table... Figure out how to handle!
- 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;
- }
- // They're both global [WRONG! Passed in one is global]
-// else if (!iscommon(type))
-//is this now right??
- else if (!iscommon(type) && !iscommon(hptr->h_type))
- {
- // 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);
- }
- // They're both common
- else
- {
- 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.
int AddSymbols(struct OFILE * Ofile)
{
struct HREC * hptr; // Hash record pointer
- char symbol[SYMLEN];
if (vflag > 1)
printf("Add symbols for file %s\n", Ofile->o_name);
long index = getlong(sfix); // Get symbol string index
long type = getlong(sfix + 4); // Get symbol type
long value = getlong(sfix + 8); // Get symbol value
- memset(symbol, 0, SYMLEN);
- strcpy(symbol, sstr + index);
if ((Ofile->isArchiveFile) && !(Ofile->o_flags & O_USED))
{
if ((type & T_EXT) && (type & (T_SEG | T_ABS)))
- if (AddARSymbol(symbol, Ofile))
+ if (AddARSymbol(sstr + index, Ofile))
return 1;
}
else if (type == T_EXT)
{
- // External symbal that is *not* in the current unit
- hptr = LookupHREC(symbol);
+ // External symbol that is *not* in the current unit
+ hptr = LookupHREC(sstr + index);
if (hptr != NULL)
hptr->h_ofile->o_flags |= O_USED; // Mark .o file as used
// Otherwise add to unresolved list
- else if (AddUnresolvedSymbol(symbol, Ofile))
- return 1; // Error if addition failed
+ else
+ {
+ // Check for built-in externals...
+ if ((strcmp(sstr + index, "_TEXT_E") != 0)
+ && (strcmp(sstr + index, "_DATA_E") != 0)
+ && (strcmp(sstr + index, "_BSS_E") != 0))
+ {
+ if (AddUnresolvedSymbol(sstr + index, Ofile))
+ return 1; // Error if addition failed
+ }
+ }
}
else if ((type & T_EXT) && (type & (T_SEG | T_ABS)))
{
+#if 0
// Symbol in the current unit that is also EXPORTED
- if (DealWithSymbol(symbol, type, value, Ofile))
+ if (DealWithSymbol(sstr + index, type, value, Ofile))
return 1; // Error if addition failed
+#else
+ hptr = LookupHREC(sstr + index);
+
+ // Symbol isn't in the table, so try to add it:
+ if (hptr == NULL)
+ {
+ if (AddSymbolToHashList(&htable[GetHash(sstr + index)],
+ sstr + index, Ofile, value, type))
+ return 1;
+ }
+ else
+ {
+ // Symbol already exists, decide what to do about it
+ if (iscommon(hptr->h_type))
+ {
+ // Mismatch: common came first; warn and keep the global
+ if (wflag)
+ {
+ printf("Warning: %s: global from ", sstr + index);
+ put_name(Ofile);
+ printf(" used, common from ");
+ put_name(hptr->h_ofile);
+ printf(" discarded.\n");
+ }
+
+ hptr->h_ofile = Ofile;
+ hptr->h_type = type;
+ hptr->h_value = value;
+ }
+ else
+ {
+ // Global exported by another ofile; warn and make this one
+ // extern
+ if (wflag)
+ {
+ printf("Duplicate symbol %s: ", sstr + index);
+ put_name(hptr->h_ofile);
+ printf(" used, ");
+ put_name(Ofile);
+ printf(" discarded\n");
+ }
+
+ // Set the global in this unit to pure external
+ // (is this a good idea? what if the other one is a ref to
+ // this one???)
+ putlong(sfix + 4, T_EXT);
+ }
+ }
+#endif
}
sfix += 12; // Increment symbol fixup pointer
// Don't do anything if this is just an ARCHIVE marker, just add the file
// to the olist
- // (Shamus: N.B. it does no such ARCHIVE thing ATM)
+ // (Shamus: N.B.: it does no such ARCHIVE thing ATM)
if (!(obj->o_flags & O_ARCHIVE))
{
Ofile->o_header.magic = getlong(ptr);
// Process the unresolved symbols list. This may involve pulling in symbols
// from any included .a units. Such units are lazy linked by default; we
- // generally don't want everything they provide, just what's refenced.
+ // generally don't want everything they provide, just what's referenced.
for(uptr=unresolved; uptr!=NULL; )
{
if (vflag > 1)
//
char * path_tail(char * name)
{
+ // Find last occurance of PATH_DELIMETER
char * temp = strrchr(name, PATH_DELIMITER);
// Return what was passed in if path delimiter was not found
//
int LoadInclude(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
+ char * ptr, * sptr;
+ int i;
unsigned symtype = 0;
- fsize = FileSize(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;
+ long fsize = FileSize(handle); // Get size of include file
+ long dsize = (fsize + secalign) & ~secalign; // Align size to boundary
+ int sym1len = strlen(sym1) + 1; // Get sym1 length + null termination
+ int sym2len = strlen(sym2) + 1; // Get sym2 length + null termination
+ long size = 32 + dsize + 24 + 4 + sym1len + sym2len + 4;
// Use calloc so the header & fixups initialize to zero
// Allocate object image memory
return 1;
}
- // SCPCD : get the name of the file instead of all pathname
+ // SCPCD: get the name of the file instead of all pathname
strcpy(obj_fname[obj_index], path_tail(fname));
obj_segsize[obj_index][0] = (getlong(ptr + 4) + secalign) & ~secalign;
obj_segsize[obj_index][1] = (getlong(ptr + 8) + secalign) & ~secalign;
}
else if (HasDotOSuffix(objName))
{
+
+ // Strip off any trailing forward slash at end of object name
+ int lastChar = strlen(objName) - 1;
+
+ if (objName[lastChar] == '/')
+ objName[lastChar] = 0;
+
//printf("Processing object \"%s\" (size == %i, obj_index == %i)...\n", objName, atoi(objSize), obj_index);
strcpy(obj_fname[obj_index], objName);
obj_segsize[obj_index][0] = (getlong(ptr + 60 + 4) + secalign) & ~secalign;
lseek(handle[i], 0L, 0); // Reset to start of input file
- // Look for RMAC/MAC/GCC ($20107) object files
- if ((getlong(magic) == 0x00000107) || (getlong(magic) == 0x00020107))
+ // Look for RMAC/MAC/GCC (a.out) object files
+ if ((getlong(magic) & 0xFFFF) == 0x0107)
{
// Process input object file
if (LoadObject(name[i], handle[i], 0L))
{
// Close file and error
printf("%s is not a supported object or archive file\n", name[i]);
+ printf("Magic == [%02X][%02X][%02X][%02X]\n", magic[0], magic[1], magic[2], magic[3]);
close(handle[i]);
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;
+ // Segment order is TEXT, DATA, BSS
+ // Text segment can be 'r' or a value
if ((*argv[i] == 'r' || *argv[i] == 'R') && !argv[i][1])
{
ttype = -1; // TEXT segment is relocatable
printf("Error in text-segment address: cannot be contiguous\n");
return 1;
}
- else if ((ttype = 0), getval(argv[i], &tval))
+ else if (GetHexValue(argv[i], &tval))
{
- printf("Error in text-segment address: %s is not 'r', 'x' or an address.", argv[i]);
+ printf("Error in text-segment address: %s is not 'r' or an address.", argv[i]);
return 1;
}
i++;
- // Data segment can be 'r', 'x' or a value
- dtype = 0;
+ // Data segment can be 'r', 'x' or a value
if ((*argv[i] == 'r' || *argv[i] == 'R') && !argv[i][1])
{
dtype = -1; // DATA segment is relocatable
{
dtype = -2; // DATA follows TEXT
}
- else if ((dtype = 0), getval(argv[i],&dval))
+ else if (GetHexValue(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 = -3; // BSS follows DATA
}
- else if ((btype = 0), getval(argv[i],&bval))
+ else if (GetHexValue(argv[i], &bval))
{
printf("Error in bss-segment address: %s is not 'r', 'x[td]', or an address.", argv[i]);
return 1;
sflag = 1;
break;
+ case 'u':
+ case 'U': // Undefined symbols
+ uflag++;
+ break;
case 'v':
case 'V': // Verbose information
if (!vflag && !versflag)
printf(" d: double phrase (16 bytes)\n");
printf(" q: quad phrase (32 bytes)\n");
printf(" -s output only global symbols\n");
+ printf(" -u allow unresolved symbols (experimental)\n");
printf(" -v set verbose mode\n");
printf(" -w show linker warnings\n");
printf(" -z suppress banner\n");
void rln_exit(void)
{
char tempbuf[128];
+ char * c;
// Display link status if verbose mode
if (vflag)
if (waitflag)
{
printf("\nPress the [RETURN] key to continue. ");
- fgets(tempbuf, 128, stdin);
+ c = fgets(tempbuf, 128, stdin);
}
exit(errflag);
if (s) // Attempt to obtain env variable
strcpy(libdir, s); // Store it if found
+ // Initialize some vars
+ tval = dval = bval = 0;
+ ttype = dtype = btype = 0;
+
// Parse the command line
if (doargs(argc, argv))
{
projects / rln / blobdiff