2 // RMAC - Renamed Macro Assembler for all Atari computers
3 // OBJECT.C - Writing Object Files
4 // Copyright (C) 199x Landon Dyer, 2011-2021 Reboot and Friends
5 // RMAC derived from MADMAC v1.07 Written by Landon Dyer, 1986
6 // Source utilised with the kind permission of Landon Dyer
22 uint32_t symsize = 0; // Size of BSD/ELF symbol table
23 uint32_t strindx = 0x00000004; // BSD/ELF string table index
24 uint8_t * strtable; // Pointer to the symbol string table
25 uint8_t * objImage; // Global object image pointer
26 int elfHdrNum[9] = { 0, 0, 0, 0, 0, 0, 0, 0, 0 };
29 static uint16_t tdb_tab[] = {
31 AL_TEXT, // TEXT segment based
32 AL_DATA, 0, // DATA segment based
33 AL_BSS // BSS segment based
36 uint32_t PRGFLAGS; /* PRGFLAGS as defined in Atari Compendium Chapter 2
37 Definition Bit(s) Meaning
38 --------------- ------- --------------------------------------------------------
39 PF_FASTLOAD 0 If set, clear only the BSS area on program load,
40 otherwise clear the entire heap.
41 PF_TTRAMLOAD 1 If set, the program may be loaded into alternative RAM,
42 otherwise it must be loaded into standard RAM.
43 PF_TTRAMMEM 2 If set, the program's Malloc() requests may be satisfied
44 from alternative RAM, otherwise they must be satisfied
47 See left. 4 & 5 If these bits are set to 0 (PF_PRIVATE), the processes'
48 entire memory space will be considered private
49 (when memory protection is enabled).If these bits are
50 set to 1 (PF_GLOBAL), the processes' entire memory space
51 will be readable and writable by any process (i.e.
52 global). If these bits are set to 2 (PF_SUPERVISOR), the
53 processes' entire memory space will only be readable and
54 writable by itself and any other process in supervisor
55 mode.If these bits are set to 3 (PF_READABLE), the
56 processes' entire memory space will be readable by any
57 application but only writable by itself.
58 - 6-15 Currently unused
61 // Internal function prototypes
62 static void WriteLOD(void);
63 static void WriteP56(void);
67 // Add entry to symbol table (in ALCYON mode)
68 // If 'globflag' is 1, make the symbol global
69 // If in .PRG mode, adjust symbol values for fake link
71 uint8_t * AddSymEntry(register uint8_t * buf, SYM * sym, int globflag)
73 // Copy symbol name to buffer (first 8 chars or less)
74 register uint8_t * s = sym->sname;
78 for(i=0; i<8 && *s; i++)
84 register uint16_t w1 = sym->sattr;
85 register uint16_t w = AL_DEFINED | tdb_tab[w1 & TDB];
89 // Extended symbol - Check to see if symbol is larger than 8 characters
90 // and write an extra 14 characters where the next symbol would be.
91 // Modify the flag word for this
94 //printf("%s '%i' - will write extended symbol\n", sym->sname,s[0]);
95 uint8_t *buf2 = buf + 6;
97 for(i=8; i<8+14 && *s; i++)
110 // Construct and deposit flag word
112 // o all symbols are AL_DEFINED
113 // o install T/D/B/A base
114 // o install 'equated'
115 // o commons (COMMON) are AL_EXTERN, but not BSS
116 // o exports (DEFINED) are AL_GLOBAL
117 // o imports (~DEFINED) are AL_EXTERN
119 if (w1 & EQUATED) // Equated
124 w |= AL_EXTERN | AL_GLOBAL; // Common symbol
125 w &= ~AL_BSS; // They're not BSS in Alcyon object files
130 if (globflag) // Export the symbol
134 w |= AL_EXTERN; // Imported symbol
138 register uint32_t z = (uint32_t)sym->svalue;
140 if (prg_flag) // Relocate value in .PRG segment
145 z += sect[TEXT].sloc;
148 z += sect[DATA].sloc;
151 SETBE32(buf, 0, z); // Deposit symbol value
162 // Add an entry to the BSD symbol table
164 // From stab.def (https://sites.uclouvain.be/SystInfo/usr/include/bits/stab.def.html):
166 _________________________________________________
167 | 00 - 1F are not dbx stab symbols |
168 | In most cases, the low bit is the EXTernal bit|
170 | 00 UNDEF | 02 ABS | 04 TEXT | 06 DATA |
171 | 01 |EXT | 03 |EXT | 05 |EXT | 07 |EXT |
173 | 08 BSS | 0A INDR | 0C FN_SEQ | 0E WEAKA |
174 | 09 |EXT | 0B | 0D WEAKU | 0F WEAKT |
176 | 10 WEAKD | 12 COMM | 14 SETA | 16 SETT |
177 | 11 WEAKB | 13 | 15 | 17 |
179 | 18 SETD | 1A SETB | 1C SETV | 1E WARNING|
180 | 19 | 1B | 1D | 1F FN |
182 uint8_t * AddBSDSymEntry(uint8_t * buf, SYM * sym, int globflag)
184 chptr = buf; // Point to buffer for depositing longs
185 D_long(strindx); // Deposit the symbol string index
187 uint16_t w1 = sym->sattr; // Obtain symbol attributes
188 uint32_t z = 0; // Initialize resulting symbol flags
192 z = 0x02000000; // Set equated flag
195 // If a symbol is both EQUd and flagged as TBD then we let
196 // the later take precedence. Otherwise the linker will not even
197 // bother trying to relocate the address during link time
201 case TEXT: z = 0x04000000; break; // Set TEXT segment flag
202 case DATA: z = 0x06000000; break; // Set DATA segment flag
203 case BSS : z = 0x08000000; break; // Set BSS segment flag
207 z |= 0x01000000; // Set global flag if requested
209 D_long(z); // Deposit symbol attribute
210 z = sym->svalue; // Obtain symbol value
212 if (w1 & (DATA | BSS))
213 z += sect[TEXT].sloc; // If DATA or BSS add TEXT segment size
216 z += sect[DATA].sloc; // If BSS add DATA segment size
218 D_long(z); // Deposit symbol value
219 strcpy(strtable + strindx, sym->sname);
220 strindx += strlen(sym->sname) + 1; // Incr string index incl null terminate
221 buf += 12; // Increment buffer to next record
222 symsize += 12; // Increment symbol table size
229 // Add entry to ELF symbol table; if `globflag' is 1, make the symbol global
231 uint8_t * AddELFSymEntry(uint8_t * buf, SYM * sym, int globflag)
235 D_long(strindx); // st_name
236 D_long(sym->svalue); // st_value
237 D_long(0); // st_size
240 register WORD w1 = sym->sattr;
244 if (globflag) // Export the symbol
245 st_info |= 16; // STB_GLOBAL (1<<4)
247 else if (w1 & (GLOBAL | REFERENCED))
251 D_byte(0); // st_other
253 uint16_t st_shndx = SHN_ABS; // Assume absolute (equated) number
256 st_shndx = elfHdrNum[ES_TEXT];
258 st_shndx = elfHdrNum[ES_DATA];
260 st_shndx = elfHdrNum[ES_BSS];
261 else if (globflag && !(w1 & DEFINED) && (w1 & REFERENCED))
263 st_shndx = SHN_UNDEF;
264 } // If the symbol is global then probably we
265 // don't need to do anything (probably)
266 // since we set STB_GLOBAL in st_info above.
267 // Unless we need to set it to SHN_COMMON?
271 strcpy(strtable + strindx, sym->sname);
272 strindx += strlen(sym->sname) + 1; // Incr string index incl null terminate
273 symsize += 0x10; // Increment symbol table size
280 // Helper function for ELF output
282 int DepositELFSectionHeader(uint8_t * ptr, uint32_t name, uint32_t type, uint32_t flags, uint32_t addr, uint32_t offset, uint32_t size, uint32_t link, uint32_t info, uint32_t addralign, uint32_t entsize)
301 // Deposit an entry in the Section Header string table
303 uint32_t DepositELFSHSTEntry(uint8_t ** pTable, const uint8_t * s)
306 printf("DepositELFSHSTEntry: s = \"%s\"\n", s);
308 uint32_t strSize = strlen(s);
310 *pTable += strSize + 1;
316 // Deposit a symbol table entry in the ELF Symbol Table
318 uint32_t DepositELFSymbol(uint8_t * ptr, uint32_t name, uint32_t addr, uint32_t size, uint8_t info, uint8_t other, uint16_t shndx)
333 // Write an object file to the passed in file descriptor
334 // N.B.: Return value is ignored...
336 int WriteObject(int fd)
338 LONG tds; // TEXT & DATA segment size
339 int i; // Temporary int
340 CHUNK * cp; // Chunk (for gather)
341 uint8_t * buf; // Scratch area
342 uint8_t * p; // Temporary ptr
343 LONG trsize, drsize; // Size of relocations
344 uint32_t unused; // For supressing 'write' warnings
348 printf("TEXT segment: %d bytes\n", sect[TEXT].sloc);
349 printf("DATA segment: %d bytes\n", sect[DATA].sloc);
350 printf("BSS segment: %d bytes\n", sect[BSS].sloc);
353 // Write requested object file...
354 if ((obj_format == BSD) || ((obj_format == ALCYON) && (prg_flag == 0)))
358 // Force BSD format (if it was ALCYON format)
363 printf("Total : %d bytes\n", sect[TEXT].sloc + sect[DATA].sloc + sect[BSS].sloc);
366 sy_assign(NULL, NULL); // Assign index numbers to the symbols
367 tds = sect[TEXT].sloc + sect[DATA].sloc; // Get size of TEXT and DATA segment
368 buf = malloc(0x800000); // Allocate 8MB object file image memory
372 error("cannot allocate object file memory (in BSD mode)");
376 memset(buf, 0, 0x800000); // Clear allocated memory
377 objImage = buf; // Set global object image pointer
378 strtable = malloc(0x200000); // Allocate 2MB string table buffer
380 if (strtable == NULL)
383 error("cannot allocate string table memory (in BSD mode)");
387 memset(strtable, 0, 0x200000); // Clear allocated memory
389 // Build object file header
390 chptr = buf; // Base of header (for D_foo macros)
393 D_long(0x00000107); // Magic number
394 D_long(sect[TEXT].sloc); // TEXT size
395 D_long(sect[DATA].sloc); // DATA size
396 D_long(sect[BSS].sloc); // BSS size
397 D_long(0x00000000); // Symbol size
398 D_long(0x00000000); // First entry (0L)
399 D_long(0x00000000); // TEXT relocation size
400 D_long(0x00000000); // DATA relocation size
402 // Construct TEXT and DATA segments (without relocation changes)
403 p = buf + BSDHDRSIZE;
405 for(i=TEXT; i<=DATA; i++)
407 for(cp=sect[i].sfcode; cp!=NULL; cp=cp->chnext)
409 memcpy(p, cp->chptr, cp->ch_size);
414 // Do relocation tables (and make changes to segment data)
415 p = buf + BSDHDRSIZE + tds; // Move obj image ptr to reloc info
416 trsize = MarkBSDImage(p, tds, sect[TEXT].sloc, TEXT);// Do TEXT relocation table
417 chptr = buf + 0x18; // Point to relocation hdr entry
418 D_long(trsize); // Write the relocation table size
420 // Move obj image ptr to reloc info
421 p = buf + BSDHDRSIZE + tds + trsize;
422 drsize = MarkBSDImage(p, tds, sect[TEXT].sloc, DATA);// Do DATA relocation table
423 chptr = buf + 0x1C; // Point to relocation hdr entry
424 D_long(drsize); // Write the relocation table size
426 // Point to start of symbol table
427 p = buf + BSDHDRSIZE + tds + trsize + drsize;
428 sy_assign(p, AddBSDSymEntry); // Build symbol and string tables
429 chptr = buf + 0x10; // Point to sym table size hdr entry
430 D_long(symsize); // Write the symbol table size
432 // Point to string table
433 p = buf + BSDHDRSIZE + tds + trsize + drsize + symsize;
434 memcpy(p, strtable, strindx); // Copy string table to object image
435 chptr = p; // Point to string table size long
436 D_long(strindx); // Write string table size
438 // Write the BSD object file from the object image buffer
439 unused = write(fd, buf, BSDHDRSIZE + tds + trsize + drsize + symsize + strindx + 4);
443 printf("TextRel size: %d bytes\n", trsize);
444 printf("DataRel size: %d bytes\n", drsize);
449 free(strtable); // Free allocated memory
450 free(buf); // Free allocated memory
453 else if (obj_format == ALCYON)
460 printf("TOS header : 28 bytes\n");
462 printf("Total : %d bytes\n", sect[TEXT].sloc + sect[DATA].sloc + sect[BSS].sloc + (prg_flag ? 28 : 0));
465 // Assign index numbers to the symbols, get # of symbols (we assume
466 // that all symbols can potentially be extended, hence the x28)
467 // (To clarify: 28 bytes is the size of an extended symbol)
468 uint32_t symbolMaxSize = sy_assign(NULL, NULL) * 28;
470 // Alloc memory for header + text + data, symbol and relocation
471 // information construction.
472 tds = sect[TEXT].sloc + sect[DATA].sloc;
473 buf = malloc(HDRSIZE + tds + symbolMaxSize);
475 // Build object file header just before the text+data image
476 chptr = buf; // -> base of header
478 challoc = HDRSIZE + tds + symbolMaxSize;
479 D_word(0x601A); // 00 - magic number
480 D_long(sect[TEXT].sloc); // 02 - TEXT size
481 D_long(sect[DATA].sloc); // 06 - DATA size
482 D_long(sect[BSS].sloc); // 0A - BSS size
483 D_long(0); // 0E - symbol table size (filled later)
484 D_long(0); // 12 - stack size (unused)
485 D_long(PRGFLAGS); // 16 - PRGFLAGS
486 D_word(0); // 1A - relocation information exists
488 // Construct text and data segments; fixup relocatable longs in .PRG
489 // mode; finally write the header + text + data
492 for(i=TEXT; i<=DATA; i++)
494 for(cp=sect[i].sfcode; cp!=NULL; cp=cp->chnext)
496 memcpy(p, cp->chptr, cp->ch_size);
501 // Do a first pass on the Alcyon image, if in PRG mode
503 MarkImage(buf + HDRSIZE, tds, sect[TEXT].sloc, 0);
505 // Construct symbol table and update the header entry, if necessary
508 // sy_assign with AddSymEntry updates symsize (stays 0 otherwise)
509 sy_assign(buf + HDRSIZE + tds, AddSymEntry);
510 chptr = buf + 0x0E; // Point to symbol table size entry
514 printf("Symbol table: %d bytes\n", symsize);
517 // Write out the header + text & data + symbol table (if any)
518 unused = write(fd, buf, HDRSIZE + tds + symsize);
520 // Construct and write relocation information; the size of it changes if
521 // we're writing a RELMODed executable. N.B.: Destroys buffer!
522 tds = MarkImage(buf, tds, sect[TEXT].sloc, 1);
523 unused = write(fd, buf, tds);
525 else if (obj_format == ELF)
527 // Allocate 6MB object file image memory
528 buf = malloc(0x600000);
532 error("cannot allocate object file memory (in ELF mode)");
536 memset(buf, 0, 0x600000);
537 objImage = buf; // Set global object image pointer
538 strtable = malloc(0x200000); // Allocate 2MB string table buffer
540 if (strtable == NULL)
542 error("cannot allocate string table memory (in ELF mode)");
546 memset(strtable, 0, 0x200000);
548 // This is pretty much a first pass at this shite, so there's room for
550 uint8_t headers[4 * 10 * 10]; // (DWORD * 10) = 1 hdr, 10 entries
552 uint8_t shstrtab[128]; // The section header string table proper
553 uint32_t shstTab[9]; // Index into shstrtab for strings
554 uint8_t * shstPtr = shstrtab; // Temp pointer
555 uint32_t shstSize = 0;
556 int numEntries = 4; // There are always at *least* 4 sections
557 int shstIndex = 1; // The section where the shstrtab lives
558 int elfSize = 0; // Size of the ELF object
559 // Clear the header numbers
560 memset(elfHdrNum, 0, 9 * sizeof(int));
563 // First step is to see what sections need to be made; we also
564 // construct the section header string table here at the same time.
566 shstTab[ES_NULL] = shstSize;
567 shstSize += DepositELFSHSTEntry(&shstPtr, "");
568 shstTab[ES_SHSTRTAB] = shstSize;
569 shstSize += DepositELFSHSTEntry(&shstPtr, ".shstrtab");
570 shstTab[ES_SYMTAB] = shstSize;
571 shstSize += DepositELFSHSTEntry(&shstPtr, ".symtab");
572 shstTab[ES_STRTAB] = shstSize;
573 shstSize += DepositELFSHSTEntry(&shstPtr, ".strtab");
575 if (sect[TEXT].sloc > 0)
577 elfHdrNum[ES_TEXT] = shstIndex;
578 shstTab[ES_TEXT] = shstSize;
579 shstSize += DepositELFSHSTEntry(&shstPtr, ".text");
584 if (sect[DATA].sloc > 0)
586 elfHdrNum[ES_DATA] = shstIndex;
587 shstTab[ES_DATA] = shstSize;
588 shstSize += DepositELFSHSTEntry(&shstPtr, ".data");
593 if (sect[BSS].sloc > 0)
595 elfHdrNum[ES_BSS] = shstIndex;
596 shstTab[ES_BSS] = shstSize;
597 shstSize += DepositELFSHSTEntry(&shstPtr, ".bss");
602 if (sect[TEXT].relocs > 0)
604 elfHdrNum[ES_RELATEXT] = shstIndex;
605 shstTab[ES_RELATEXT] = shstSize;
606 shstSize += DepositELFSHSTEntry(&shstPtr, ".relaTEXT");
611 if (sect[DATA].relocs > 0)
613 elfHdrNum[ES_RELADATA] = shstIndex;
614 shstTab[ES_RELADATA] = shstSize;
615 shstSize += DepositELFSHSTEntry(&shstPtr, ".relaDATA");
620 elfHdrNum[ES_SHSTRTAB] = shstIndex + 0;
621 elfHdrNum[ES_SYMTAB] = shstIndex + 1;
622 elfHdrNum[ES_STRTAB] = shstIndex + 2;
625 printf("ELF shstrtab size: %i bytes. Entries:\n", shstSize);
626 for(int j=0; j<i; j++)
627 printf("\"%s\"\n", shstrtab + shstTab[j]);
630 // Construct ELF header
631 // If you want to make any sense out of this you'd better take a look
632 // at Executable and Linkable Format on Wikipedia.
636 D_long(0x7F454C46); // 00 - "<7F>ELF" Magic Number
637 D_byte(0x01); // 04 - 32 vs 64 (1 = 32, 2 = 64)
638 D_byte(0x02); // 05 - Endianness (1 = LE, 2 = BE)
639 D_byte(0x01); // 06 - Original version of ELF (set to 1)
640 D_byte(0x00); // 07 - Target OS ABI (0 = System V)
641 D_byte(0x00); // 08 - ABI Extra (unneeded)
642 D_byte(0x00); // 09 - Pad bytes
645 D_word(0x01); // 10 - ELF Type (1 = relocatable)
646 D_word(0x04); // 12 - Architecture (EM_68K = 4, Motorola M68K family)
647 D_long(0x01); // 14 - Version (1 = original ELF)
648 D_long(0x00); // 18 - Entry point virtual address (unneeded)
649 D_long(0x00); // 1C - Program header table offset (unneeded)
650 D_long(0x00); // 20 - Section header table offset (to be determined)
654 // Specifically for 68000 CPU
655 D_long(0x01000000) // 24 - Processor-specific flags - EF_M68K_M68000
659 // CPUs other than 68000 (68020...)
660 D_long(0); // 24 - Processor-specific flags (ISA dependent)
663 D_word(0x0034); // 28 - ELF header size in bytes
664 D_word(0); // 2A - Program header table entry size
665 D_word(0); // 2C - Program header table entry count
666 D_word(0x0028); // 2E - Section header entry size - 40 bytes for ELF32
667 D_word(numEntries); // 30 - Section header table entry count
668 D_word(shstIndex); // 32 - Section header string table index
672 // Deposit section header 0 (NULL)
673 headerSize += DepositELFSectionHeader(headers + headerSize, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0);
675 int textLoc = elfSize;
677 // Construct TEXT section, if any
678 if (sect[TEXT].sloc > 0)
680 headerSize += DepositELFSectionHeader(headers + headerSize, shstTab[ES_TEXT], 1, 6, 0, elfSize, sect[TEXT].sloc, 0, 0, largestAlign[0], 0);
682 for(CHUNK * cp=sect[TEXT].sfcode; cp!=NULL; cp=cp->chnext)
684 memcpy(buf + elfSize, cp->chptr, cp->ch_size);
685 elfSize += cp->ch_size;
688 // Pad for next section (LONG boundary)
689 elfSize = (elfSize + 3) & ~3;
692 int dataLoc = elfSize;
694 // Construct DATA section, if any
695 if (sect[DATA].sloc > 0)
697 headerSize += DepositELFSectionHeader(headers + headerSize, shstTab[ES_DATA], 1, 3, 0, elfSize, sect[DATA].sloc, 0, 0, largestAlign[1], 0);
699 for(CHUNK * cp=sect[DATA].sfcode; cp!=NULL; cp=cp->chnext)
701 memcpy(buf + elfSize, cp->chptr, cp->ch_size);
702 elfSize += cp->ch_size;
705 // Pad for next section (LONG boundary)
706 elfSize = (elfSize + 3) & ~3;
709 // Construct BSS section, if any
710 if (sect[BSS].sloc > 0)
712 headerSize += DepositELFSectionHeader(headers + headerSize, shstTab[ES_BSS], 8, 3, 0, elfSize, sect[BSS].sloc, 0, 0, largestAlign[2], 0);
715 int textrelLoc = headerSize;
717 // Add headers for relocated sections, if any...
718 if (sect[TEXT].relocs > 0)
719 headerSize += DepositELFSectionHeader(headers + headerSize, shstTab[ES_RELATEXT], 4, 0x00, 0, 0, 0, elfHdrNum[ES_SYMTAB], elfHdrNum[ES_TEXT], 4, 0x0C);
721 int datarelLoc = headerSize;
723 if (sect[DATA].relocs > 0)
724 headerSize += DepositELFSectionHeader(headers + headerSize, shstTab[ES_RELADATA], 4, 0x40, 0, 0, 0, elfHdrNum[ES_SYMTAB], elfHdrNum[ES_DATA], 4, 0x0C);
727 headerSize += DepositELFSectionHeader(headers + headerSize, shstTab[ES_SHSTRTAB], 3, 0, 0, elfSize, shstSize, 0, 0, 1, 0);
728 memcpy(buf + elfSize, shstrtab, shstSize);
730 // Pad for next section (LONG boundary)
731 elfSize = (elfSize + 3) & ~3;
733 // Add section headers
734 int headerLoc = elfSize;
735 chptr = buf + 0x20; // Set section header offset in ELF header
737 elfSize += (4 * 10) * numEntries;
739 // Add symbol table & string table
740 int symtabLoc = elfSize;
741 strindx = 0; // Make sure we start at the beginning...
742 elfSize += DepositELFSymbol(buf + elfSize, 0, 0, 0, 0, 0, 0);
747 if (sect[TEXT].sloc > 0)
749 elfSize += DepositELFSymbol(buf + elfSize, 0, 0, 0, 3, 0, elfHdrNum[ES_TEXT]);
753 if (sect[DATA].sloc > 0)
755 elfSize += DepositELFSymbol(buf + elfSize, 0, 0, 0, 3, 0, elfHdrNum[ES_DATA]);
759 if (sect[BSS].sloc > 0)
761 elfSize += DepositELFSymbol(buf + elfSize, 0, 0, 0, 3, 0, elfHdrNum[ES_BSS]);
765 int numSymbols = sy_assign_ELF(buf + elfSize, AddELFSymEntry);
766 elfSize += numSymbols * 0x10;
769 int strtabLoc = elfSize;
770 memcpy(buf + elfSize, strtable, strindx);
772 // Pad for next section (LONG boundary)
773 elfSize = (elfSize + 3) & ~3;
775 headerSize += DepositELFSectionHeader(headers + headerSize, shstTab[ES_SYMTAB], 2, 0, 0, symtabLoc, (numSymbols + extraSyms) * 0x10, shstIndex + 2, firstglobal + extraSyms, 4, 0x10);
776 headerSize += DepositELFSectionHeader(headers + headerSize, shstTab[ES_STRTAB], 3, 0, 0, strtabLoc, strindx, 0, 0, 1, 0);
778 // Add relocation tables, if any (no need to align after these, they're
779 // already on DWORD boundaries)
780 if (sect[TEXT].relocs > 0)
782 uint32_t textrelSize = CreateELFRelocationRecord(buf + elfSize, buf + textLoc, TEXT);
783 // Deposit offset & size, now that we know them
784 chptr = headers + textrelLoc + 0x10;
787 elfSize += textrelSize;
790 if (sect[DATA].relocs > 0)
792 uint32_t datarelSize = CreateELFRelocationRecord(buf + elfSize, buf + dataLoc, DATA);
793 // Deposit offset & size, now that we know them
794 chptr = headers + datarelLoc + 0x10;
797 elfSize += datarelSize;
800 // Copy headers into the object
801 memcpy(buf + headerLoc, headers, headerSize);
803 // Finally, write out the object
804 unused = write(fd, buf, elfSize);
806 // Free allocated memory
813 else if (obj_format == XEX)
815 // Just write the object file
818 else if (obj_format == P56 || obj_format == LOD)
820 // Allocate 6MB object file image memory
821 uint8_t * buf = malloc(0x600000);
824 return error("cannot allocate object file memory (in P56/LOD mode)");
826 // objImage = buf; // Set global object image pointer
828 memset(buf, 0, 0x600000); // Clear allocated memory
830 // Iterate through DSP ram buffers
831 chptr = buf; // -> base of header
835 if (obj_format == LOD)
840 // Write all the things \o/
841 unused = write(fd, buf, chptr - buf);
846 else if (obj_format == RAW)
850 return error("cannot output absolute binary without a starting address (.org or command line)");
853 // Alloc memory for text + data construction.
854 tds = sect[TEXT].sloc + sect[DATA].sloc;
858 // Construct text and data segments; fixup relocatable longs;
859 // finally write the text + data
862 objImage = buf; // Set global object image pointer
864 for (i = TEXT; i <= DATA; i++)
866 for (cp = sect[i].sfcode; cp != NULL; cp = cp->chnext)
868 memcpy(p, cp->chptr, cp->ch_size);
873 if (MarkABSImage(buf, tds, sect[TEXT].sloc, TEXT) != OK) // Do TEXT relocation table
877 if (MarkABSImage(buf, tds, sect[TEXT].sloc, DATA) != OK) // Do DATA relocation table
882 // Write out the header + text & data + symbol table (if any)
883 unused = write(fd, buf, tds);
890 static void WriteLOD(void)
892 D_printf("_START %s 0000 0000 0000 RMAC %01i.%01i.%01i\n\n", firstfname, MAJOR, MINOR, PATCH);
894 for(DSP_ORG * l=&dsp_orgmap[0]; l<dsp_currentorg; l++)
896 if (l->end != l->start)
900 case ORG_P: D_printf("_DATA P %.4X\n", l->orgadr); break;
901 case ORG_X: D_printf("_DATA X %.4X\n", l->orgadr); break;
902 case ORG_Y: D_printf("_DATA Y %.4X\n", l->orgadr); break;
903 case ORG_L: D_printf("_DATA L %.4X\n", l->orgadr); break;
905 error("Internal error: unknown DSP56001 org'd section");
909 CHUNK * cp = l->chunk;
910 uint8_t * p_chunk = l->start;
911 uint8_t * p_chunk_end = p_chunk;
914 while (p_chunk_end != l->end)
916 if (l->end < (cp->chptr + cp->ch_size) && l->end > cp->chptr)
918 // If the end of the section is inside the current chunk, just dump everything and stop
919 p_chunk_end = l->end;
923 // If the end of the section is not inside the current chunk, just dump everything from the current chunk and move on to the next
924 p_chunk_end = cp->chptr + cp->ch_size;
927 uint32_t count = (uint32_t)(p_chunk_end - p_chunk);
929 for(uint32_t i=0; i<count; i+=3)
933 D_printf("%.6X ", (((p_chunk[0] << 8) | p_chunk[1]) << 8) | p_chunk[2]);
937 D_printf("%.6X\n", (((p_chunk[0] << 8) | p_chunk[1]) << 8) | p_chunk[2]);
944 cp = cp->chnext; // Advance chunk
947 p_chunk = cp->chptr; // Set dump pointer to start of this chunk
955 // Dump the symbol table into the buf
958 D_printf("\n_END %.4X\n", dsp_orgmap[0].orgadr);
962 static void WriteP56(void)
964 for(DSP_ORG * l=&dsp_orgmap[0]; l<dsp_currentorg; l++)
966 if (l->end == l->start)
969 if ((l->memtype < ORG_P) || (l->memtype > ORG_L))
971 error("Internal error: unknown DSP56001 org'd section");
975 CHUNK * cp = l->chunk;
976 uint8_t * p_chunk = l->start;
977 uint8_t * p_chunk_end = p_chunk;
979 // Memory type (P, X, Y or L)
982 // Chunk start address (in DSP words)
985 // Chunk length (in DSP words)
986 // We'll fill this field after we write the chunk so we can calculate
987 // how long it is (so if the chunk is split into different CHUNKs we
988 // can deal with this during copy)
989 uint8_t * p_buf_len = chptr;
993 uint32_t chunk_size = 0;
995 while (p_chunk_end != l->end)
997 if (l->end < (cp->chptr + cp->ch_size) && l->end > cp->chptr)
999 // If the end of the section is inside the current chunk, just
1000 // dump everything and stop
1001 p_chunk_end = l->end;
1005 // If the end of the section is not inside the current chunk,
1006 // just dump everything from the current chunk and move on to
1008 p_chunk_end = cp->chptr + cp->ch_size;
1011 uint32_t current_chunk_size = p_chunk_end - p_chunk;
1012 chunk_size += current_chunk_size;
1013 memcpy(chptr, p_chunk, current_chunk_size);
1014 chptr += current_chunk_size;
1016 cp = cp->chnext; // Advance chunk
1019 p_chunk = cp->chptr; // Set dump pointer to start of this chunk
1022 // Now we can mark the chunk's length (DSP word size is 24-bits, so
1023 // the byte count needs to be divided by 3)
1024 SETBE24(p_buf_len, chunk_size / 3);