//
-// RLN - Reboot's Linker for the Atari Jaguar console system
-// Copyright (C) 199x, Allan K. Pratt, 2014-2018 Reboot & Friends
+// RLN - Renamed Linker for the Atari Jaguar console system
+// Copyright (C) 199x, Allan K. Pratt, 2014-2021 Reboot & Friends
//
#include "rln.h"
// 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
- wordreloc = (rflg & 0x00000002 ? 1 : 0); // Set word relocation flag
- opreloc = (rflg & 0x00000004 ? 1 : 0); // Set OP relocation flag
+ glblreloc = (rflg & BSDREL_GLOBAL ? 1 : 0);
+ absreloc = (rflg & BSDREL_ABS ? 1 : 0);
+ relreloc = (rflg & BSDREL_PCREL ? 1 : 0);
+ wordreloc = (rflg & BSDREL_WORD ? 1 : 0);
+ opreloc = (rflg & BSDREL_OP ? 1 : 0);
// Additional processing required for global relocations
if (glblreloc)
// 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));
+ symidx = GetLong(symtab + (BSDREL_SYMIDX(rflg) * 12));
memset(sym, 0, SYMLEN);
strcpy(sym, symbols + symidx);
olddata = newdata = 0; // Initialise old and new segment data
olddata |= saveBits2; // Restore upper 3 bits of data addr
}
- if (rflg & 0x01)
+ if (rflg & BSDREL_MOVEI)
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 = (rflg & 0xFFFFFF00);
+ swcond = (rflg & BSDREL_SEGMASK);
if (!glblreloc)
{
switch (swcond)
{
- case 0x00000200: // Absolute Value
+ case BSDREL_SEG_ABS:
break;
- case 0x00000400: // TEXT segment relocation record
+ case BSDREL_SEG_TEXT:
// SCPCD : the symbol point to a text segment, we should use the textoffset
newdata = tbase + textoffset + olddata;
break;
- case 0x00000600: // DATA segment relocation record
+ case BSDREL_SEG_DATA:
newdata = dbase + dataoffset
+ (olddata - ofile->o_header.tsize);
break;
- case 0x00000800: // BSS segment relocation record
+ case BSDREL_SEG_BSS:
newdata = bbase + bssoffset
+ (olddata - (ofile->o_header.tsize
+ ofile->o_header.dsize));
// 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)
+ if (rflg & BSDREL_MOVEI)
newdata = _SWAPWORD(newdata);
if (wordreloc)
dbase = dval;
if (!bval)
- // BSS follows DATA
- bbase = dval + datasize;
+ {
+ if (btype == -2)
+ // BSS follows TEXT
+ bbase = tval + textsize;
+ else
+ // BSS follows DATA
+ bbase = dval + datasize;
+ }
else
+ {
// BSS is independent of DATA
bbase = bval;
+ }
}
// Inject segment end labels, for C compilers that expect this shite
return AddToProcessingList(ptr, fname, nullStr, 0, tSize, dSize, bSize);
}
+uint32_t SymTypeAlcToAout(uint32_t alcType)
+{
+ uint32_t type = T_UNDF;
+
+ // Symbol type mappings here are derived from comparing Alcyon and BSD
+ // object files generated by MADMAC using the "size" utility from jag_utils
+ // (https://github.com/cubanismo/jag_utils) and the old PC/DOS Atari SDK.
+ //
+ // In BSD/a.out:
+ //
+ // 1) text | global text == text relocatable symbol in this file
+ // 2) data | global data == data relocatable symbol in this file
+ // 3) BSS | global BSS == bss relocatable symbol in this file
+ // 4) ABS | global ABS == non-relocatable symbol in this file
+ // 4) <none> | global <none> == undefined global symbol (extern)
+ //
+ // In DRI/Alcyon:
+ //
+ // 1) Everything seems to be marked defined.
+ // 2) There is an explicit "external" bit. It appears to be mutually
+ // exclusive with the "global" bit, at least in MADMAC's output.
+ // 3) There are separate "equated" and "equated reg" type bits that
+ // both represent ABS/non-relocatable values.
+ if ((alcType & ALCSYM_EQUATED) ||
+ (alcType & ALCSYM_EQUATED_REG))
+ type |= T_ABS;
+ else if (alcType & ALCSYM_TEXT)
+ type |= T_TEXT;
+ else if (alcType & ALCSYM_DATA)
+ type |= T_DATA;
+ else if (alcType & ALCSYM_BSS)
+ type |= T_BSS;
+
+ if ((alcType & ALCSYM_GLOBAL) ||
+ (alcType & ALCSYM_EXTERN))
+ type |= T_GLBL;
+
+ return type;
+}
+
+int LoadAlcyon(char * fname, int fd)
+{
+ char *ptr, *sptr, *aout, *saout, *traout, *strPtr;
+ char *trelptr, *drelptr, *relend;
+ struct ALCHEADER hdr;
+ struct ALCSYM *alcSyms;
+ long size = FileSize(fd);
+ size_t symStrLen;
+ size_t strOff;
+ uint32_t numSyms, numTRel, numDRel, i, j;
+
+ // Validate the file is at least large enough to contain a valid header
+ if (size < 0x1c)
+ {
+ printf("Alcyon object file %s too small to contain header\n", fname);
+ return 1;
+ }
+
+ // Allocate memory for file data
+ ptr = malloc(size);
+
+ if (ptr == NULL)
+ {
+ printf("Out of memory while processing %s\n", fname);
+ close(fd);
+ return 1;
+ }
+
+ // Read in file data
+ if (read(fd, ptr, size) != size)
+ {
+ printf("File read error on %s\n", fname);
+ close(fd);
+ free(ptr);
+ return 1;
+ }
+
+ close(fd);
+
+ hdr.magic = GetWord(ptr);
+ hdr.tsize = GetLong(ptr + 2);
+ hdr.dsize = GetLong(ptr + 6);
+ hdr.bsize = GetLong(ptr + 10);
+ hdr.ssize = GetLong(ptr + 14);
+
+ // Construct a BSD-style/aout object file in memory from the Alcyon data
+ numSyms = hdr.ssize / 14;
+
+ alcSyms = calloc(numSyms, sizeof(*alcSyms));
+ if (alcSyms == NULL)
+ {
+ printf("Out of memory while processing %s\n", fname);
+ free(ptr);
+ return 1;
+ }
+
+ sptr = ptr + 0x1c + hdr.tsize + hdr.dsize;
+ trelptr = sptr + hdr.ssize;
+ drelptr = trelptr + hdr.tsize;
+ relend = drelptr + hdr.dsize;
+
+ if (relend - ptr > size)
+ {
+ printf("Alcyon object file %s truncated: Header wants %ldB, file is %ldB\n",
+ fname, relend - ptr, size);
+ return 1;
+ }
+
+ for (i = 0, symStrLen = 0; i < numSyms; i++)
+ {
+ memcpy(alcSyms[i].name, sptr, 8);
+ alcSyms[i].type = GetWord(sptr + 8);
+ alcSyms[i].value = GetLong(sptr + 10);
+ symStrLen += strnlen((char *)alcSyms[i].name, 8) + 1;
+ sptr += 14;
+ }
+
+ for (i = 0, numTRel = 0; trelptr + i < drelptr; i += 2)
+ {
+ uint16_t rel = GetWord(trelptr + i);
+ if ((rel != ALCREL_ABS) &&
+ (rel != ALCREL_LONG))
+ numTRel++;
+ }
+
+ for (i = 0, numDRel = 0; drelptr + i < relend; i += 2)
+ {
+ uint16_t rel = GetWord(drelptr + i);
+ if ((rel != ALCREL_ABS) &&
+ (rel != ALCREL_LONG))
+ numDRel++;
+ }
+
+ aout = malloc(32 + /* header */
+ hdr.tsize +
+ hdr.dsize +
+ numTRel * 8 + /* Text section relocations */
+ numDRel * 8 + /* Data section relocations */
+ numSyms * 12 + /* symbol table */
+ 4 + symStrLen + /* string table size + strings */
+ 4 /* NULL-terminator for file */);
+ if (aout == NULL)
+ {
+ printf("Out of memory while processing %s\n", fname);
+ free(alcSyms);
+ free(ptr);
+ return 1;
+ }
+
+ // Construct the BSD/a.out header.
+ PutLong(aout, 0x00000107); // Magic number
+
+ PutLong(aout+4, hdr.tsize); // Text size
+ PutLong(aout+8, hdr.dsize); // Data size
+ PutLong(aout+12, hdr.bsize); // BSS size
+ PutLong(aout+16, numSyms * 12); // Symbol table size
+ PutLong(aout+20, 0L); // Entry point
+
+ PutLong(aout+24, numTRel * 8); // TEXT relocation size
+ PutLong(aout+28, numDRel * 8); // DATA relocation size
+
+ // Copy the raw text and data segments
+ memcpy(aout + 32, ptr + 0x1c, hdr.tsize);
+ memcpy(aout + 32 + hdr.tsize, ptr + 0x1c + hdr.tsize, hdr.dsize);
+
+ // Set traout to the start of the relocation tables
+ traout = aout + 32 + hdr.tsize + hdr.dsize;
+
+ // Set saout to symbol table location
+ saout = traout + numTRel * 8 + numDRel * 8 ;
+
+ // Convert the text and data relocations to a.out format
+ for (i = 0; trelptr + i < relend; i += 2)
+ {
+ uint16_t rel = GetWord(trelptr + i);
+ uint16_t relFlags = rel & 7;
+ uint32_t aoutflags = BSDREL_ABS;
+ uint32_t valoffset = 0;
+ char *const valaddr = aout + 32 + i;
+ const uint32_t reladdr = (trelptr + i >= drelptr) ? i - hdr.tsize : i;
+
+ if (relFlags == ALCREL_LONG)
+ {
+ i += 2;
+ rel = GetWord(trelptr + i);
+ relFlags = rel & 7;
+ }
+ else
+ {
+ aoutflags |= BSDREL_WORD;
+ }
+
+ if (relFlags == ALCREL_ABS)
+ continue;
+
+ switch (relFlags) {
+ case ALCREL_EXTPCREL:
+ aoutflags &= ~BSDREL_ABS;
+ aoutflags |= BSDREL_PCREL;
+ /* Fall through */
+ case ALCREL_EXTABS:
+ aoutflags |= BSDREL_GLOBAL;
+ aoutflags |= (ALCREL_SYMIDX(rel) << BSDREL_SYMIDX_SHIFT);
+ break;
+ case ALCREL_TEXT:
+ aoutflags |= BSDREL_SEG_TEXT;
+ break;
+ case ALCREL_DATA:
+ aoutflags |= BSDREL_SEG_DATA;
+ valoffset = hdr.tsize;
+ break;
+ case ALCREL_BSS:
+ aoutflags |= BSDREL_SEG_BSS;
+ valoffset = hdr.tsize + hdr.dsize;
+ break;
+
+ default:
+ printf("Invalid Alcyon relocation flags: 0x%02x\n", relFlags);
+ free(alcSyms);
+ free(ptr);
+ free(aout);
+ return 1;
+ }
+
+ if (valoffset != 0)
+ {
+ if (aoutflags & BSDREL_WORD)
+ {
+ valoffset += GetWord(valaddr);
+ PutWord(valaddr, (uint16_t)valoffset);
+ }
+ else
+ {
+ valoffset += GetLong(valaddr);
+ PutLong(valaddr, valoffset);
+ }
+ }
+
+ PutLong(traout, reladdr);
+ PutLong(traout+4, aoutflags);
+ traout += 8;
+ }
+
+ // Done with the Alcyon data.
+ free(ptr);
+ ptr = NULL;
+ sptr = NULL;
+
+ // Set strPtr to string table location and write string table size
+ strPtr = saout + numSyms * 12;
+ PutLong(strPtr, 4 + symStrLen);
+
+ for (i = 0, strOff = 4; i < numSyms; i++)
+ {
+ PutLong(saout, strOff); // String offset of symbol
+ PutLong(saout+4, SymTypeAlcToAout(alcSyms[i].type)); // Symbol type
+ PutLong(saout+8, alcSyms[i].value); // Symbol value
+ saout += 12;
+
+ for (j = 0; j < 8 && alcSyms[i].name[j] != '\0'; j++)
+ *(strPtr + strOff + j) = alcSyms[i].name[j];
+ strOff += j; // Step past string
+ *(strPtr + strOff) = '\0'; // Terminate symbol string
+ strOff++; // Step past termination
+ }
+
+ PutLong(strPtr + strOff, 0L); // Terminating long for object file
+
+ // Done with the Alcyon symbol table.
+ free(alcSyms);
+
+ // Now add this image to the list of pending ofiles (plist)
+ return AddToProcessingList(aout, fname, nullStr, 0, hdr.tsize, hdr.dsize, hdr.bsize);
+}
//
// What it says on the tin: check for a .o suffix on the passed in string
}
// Check to see if a long filename was requested
- if (objName[0] == 0x20)
+ // N.B.: " " is for GNU archives, and "/" is for BSD archives
+ if ((objName[0] == 0x20) || (objName[0] == '/'))
{
uint32_t fnSize = atoi(objName + 1);
if (LoadObject(name[i], handle[i], 0L))
return 1;
}
+ // Look for DRI Alcyon C (and old MAC) object files
+ else if (GetWord(magic) == 0x601A)
+ {
+ // Process Alcyon object file.
+ if (LoadAlcyon(name[i], handle[i]))
+ return 1;
+ }
// Otherwise, look for an object archive file
else if (strncmp(magic, "!<arch>\x0A", 8) == 0)
{
}
else if ((*argv[i] == 'x' || *argv[i] == 'X'))
{
- btype = -3; // BSS follows DATA
+ switch (argv[i][1])
+ {
+ case 'd': case 'D': case '\0':
+ btype = -3; // BSS follows DATA
+ break;
+
+ case 't': case 'T':
+ btype = -2; // BSS follows TEXT
+ if (btype == dtype)
+ {
+ printf("Error in bss-segment address: data-segment also follows text\n");
+ return 1;
+ }
+ break;
+
+ default:
+ btype = -4; // Error
+ break;
+ }
}
else if (GetHexValue(argv[i], &bval))
+ {
+ btype = -4;
+ return 1;
+ }
+
+ if (btype == -4)
{
printf("Error in bss-segment address: %s is not 'r', 'x[td]', or an address.", argv[i]);
return 1;
case 'e':
case 'E': // Output COFF (absolute only)
cflag = 1;
+
+ if (noheaderflag)
+ printf("Warning: -e overridden by -n, output will be headerless\n");
+
break;
case 'g':
case 'G': // Output source level debugging
if (noheaderflag)
warn('n', 1);
+ if (cflag)
+ printf("Warning: -e overridden by -n, output will be headerless\n");
+
noheaderflag = 1;
break;
case 'o':
wflag = 1;
break;
+ case 'y':
+ case 'Y':
+ if (i >= argc)
+ {
+ printf("No directory filename following -y switch\n");
+ return 1;
+ }
+
+ if (strlen(argv[i]) > FARGSIZE * 3)
+ {
+ printf("Directory file name too long (sorry!)\n");
+ return 1;
+ }
+
+ strcpy(libdir, argv[i++]);
+ break;
case 'z':
case 'Z': // Suppress banner flag
if (zflag)
"| '__| | '_ \\\n"
"| | | | | | |\n"
"|_| |_|_| |_|\n"
- "\nReboot's Linker for Atari Jaguar\n"
- "Copyright (c) 199x Allan K. Pratt, 2014-2018 Reboot\n"
+ "\nRenamed Linker for Atari Jaguar\n"
+ "Copyright (c) 199x Allan K. Pratt, 2014-2021 Reboot & Friends\n"
"V%i.%i.%i %s (%s)\n\n", MAJOR, MINOR, PATCH, __DATE__, PLATFORM);
}
}
printf("\n");
printf("Options:\n");
printf(" -? or -h display usage information\n");
- printf(" -a <text> <data> <bss> output absolute file\n");
+ printf(" -a <text> <data> <bss> output absolute file (default: ABS)\n");
printf(" hex value: segment address\n");
printf(" r: relocatable segment\n");
- printf(" x: contiguous segment\n");
+ printf(" x[dt]: contiguous segment\n");
+ printf(" for contiguous bss:\n");
+ printf(" d(default): follows data segment\n");
+ printf(" t: follows text 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(" -ii <fname> <label> incbin <fname> and set <label> (no truncation)\n");
printf(" -l add local symbols\n");
printf(" -m produce load symbols map\n");
- printf(" -n output no file header to absolute file\n");
+ printf(" -n output no file header to absolute file (overrides -e)\n");
printf(" -o <fname> set output name\n");
printf(" -r<size> section alignment size\n");
printf(" w: word (2 bytes)\n");
printf(" -u allow unresolved symbols (experimental)\n");
printf(" -v set verbose mode\n");
printf(" -w show linker warnings\n");
+ printf(" -y <fname> set include path (also set by RLNPATH)\n");
printf(" -z suppress banner\n");
printf("\n");
}
ExitLinker();
}
+ // Check to see if include paths actually exist
+ if (strlen(libdir) > 0)
+ {
+ DIR * test = opendir(libdir);
+
+ if (test == NULL)
+ {
+ printf("Invalid include path: %s\n", libdir);
+ errflag = 1;
+ ExitLinker();
+ }
+
+ closedir(test);
+ }
+
if (!zflag && !vflag)
{
ShowVersion(); // Display version information
projects / rln / blobdiff