2 // RMAC - Renamed Macro Assembler for all Atari computers
3 // OBJECT.C - Writing Object Files
4 // Copyright (C) 199x Landon Dyer, 2011-2022 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);
66 // Add entry to symbol table (in ALCYON mode)
67 // If 'globflag' is 1, make the symbol global
68 // If in .PRG mode, adjust symbol values for fake link
70 uint8_t * AddSymEntry(register uint8_t * buf, SYM * sym, int globflag)
72 // Copy symbol name to buffer (first 8 chars or less)
73 register uint8_t * s = sym->sname;
77 for(i=0; i<8 && *s; i++)
83 register uint16_t w1 = sym->sattr;
84 register uint16_t w = AL_DEFINED | tdb_tab[w1 & TDB];
88 // Extended symbol - Check to see if symbol is larger than 8 characters
89 // and write an extra 14 characters where the next symbol would be.
90 // Modify the flag word for this
93 //printf("%s '%i' - will write extended symbol\n", sym->sname,s[0]);
94 uint8_t *buf2 = buf + 6;
96 for(i=8; i<8+14 && *s; i++)
109 // Construct and deposit flag word
111 // o all symbols are AL_DEFINED
112 // o install T/D/B/A base
113 // o install 'equated'
114 // o commons (COMMON) are AL_EXTERN, but not BSS
115 // o exports (DEFINED) are AL_GLOBAL
116 // o imports (~DEFINED) are AL_EXTERN
118 if (w1 & EQUATED) // Equated
123 w |= AL_EXTERN | AL_GLOBAL; // Common symbol
124 w &= ~AL_BSS; // They're not BSS in Alcyon object files
129 if (globflag) // Export the symbol
133 w |= AL_EXTERN; // Imported symbol
137 register uint32_t z = (uint32_t)sym->svalue;
139 if (prg_flag) // Relocate value in .PRG segment
144 z += sect[TEXT].sloc;
147 z += sect[DATA].sloc;
150 SETBE32(buf, 0, z); // Deposit symbol value
160 // Add an entry to the BSD symbol table
162 // From stab.def (https://sites.uclouvain.be/SystInfo/usr/include/bits/stab.def.html):
164 _________________________________________________
165 | 00 - 1F are not dbx stab symbols |
166 | In most cases, the low bit is the EXTernal bit|
168 | 00 UNDEF | 02 ABS | 04 TEXT | 06 DATA |
169 | 01 |EXT | 03 |EXT | 05 |EXT | 07 |EXT |
171 | 08 BSS | 0A INDR | 0C FN_SEQ | 0E WEAKA |
172 | 09 |EXT | 0B | 0D WEAKU | 0F WEAKT |
174 | 10 WEAKD | 12 COMM | 14 SETA | 16 SETT |
175 | 11 WEAKB | 13 | 15 | 17 |
177 | 18 SETD | 1A SETB | 1C SETV | 1E WARNING|
178 | 19 | 1B | 1D | 1F FN |
180 uint8_t * AddBSDSymEntry(uint8_t * buf, SYM * sym, int globflag)
182 chptr = buf; // Point to buffer for depositing longs
185 D_long(strindx); // Deposit the symbol string index
189 D_long(0); // Deposit special NULL string index
192 uint16_t w1 = sym->sattr; // Obtain symbol attributes
193 uint32_t z = 0; // Initialize resulting symbol flags
195 if (sym->stype == DBGSYM)
197 // Debug symbols hard-code the a.out symbol type in the st_type field
198 // and can include additional type-specific data in the a.out symbol
199 // "other" and "description" fields, both packed into this same dword.
200 z = sym->st_type << 24;
201 z |= sym->st_other << 16;
206 // Translate rmac symbol attributes to an a.out symbol type.
209 z = 0x02000000; // Set equated flag
212 // If a symbol is both EQUd and flagged as TBD then we let the latter
213 // take precedence. Otherwise the linker will not even bother trying to
214 // relocate the address during link time.
218 case TEXT: z = 0x04000000; break; // Set TEXT segment flag
219 case DATA: z = 0x06000000; break; // Set DATA segment flag
220 case BSS : z = 0x08000000; break; // Set BSS segment flag
224 z |= 0x01000000; // Set global flag if requested
227 D_long(z); // Deposit symbol attribute
228 z = sym->svalue; // Obtain symbol value
230 if (w1 & (DATA | BSS))
231 z += sect[TEXT].sloc; // If DATA or BSS add TEXT segment size
234 z += sect[DATA].sloc; // If BSS add DATA segment size
236 D_long(z); // Deposit symbol value
239 strcpy(strtable + strindx, sym->sname);
240 strindx += strlen(sym->sname) + 1; // Incr string index incl null terminate
242 buf += 12; // Increment buffer to next record
243 symsize += 12; // Increment symbol table size
249 // Add entry to ELF symbol table; if `globflag' is 1, make the symbol global
251 uint8_t * AddELFSymEntry(uint8_t * buf, SYM * sym, int globflag)
255 D_long(strindx); // st_name
256 D_long(sym->svalue); // st_value
257 D_long(0); // st_size
260 register WORD w1 = sym->sattr;
264 if (globflag) // Export the symbol
265 st_info |= 16; // STB_GLOBAL (1<<4)
267 else if (w1 & (GLOBAL | REFERENCED))
271 D_byte(0); // st_other
273 uint16_t st_shndx = SHN_ABS; // Assume absolute (equated) number
276 st_shndx = elfHdrNum[ES_TEXT];
278 st_shndx = elfHdrNum[ES_DATA];
280 st_shndx = elfHdrNum[ES_BSS];
281 else if (globflag && !(w1 & DEFINED) && (w1 & REFERENCED))
283 st_shndx = SHN_UNDEF;
284 } // If the symbol is global then probably we
285 // don't need to do anything (probably)
286 // since we set STB_GLOBAL in st_info above.
287 // Unless we need to set it to SHN_COMMON?
291 strcpy(strtable + strindx, sym->sname);
292 strindx += strlen(sym->sname) + 1; // Incr string index incl null terminate
293 symsize += 0x10; // Increment symbol table size
299 // Helper function for ELF output
301 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)
319 // Deposit an entry in the Section Header string table
321 uint32_t DepositELFSHSTEntry(uint8_t ** pTable, const uint8_t * s)
324 printf("DepositELFSHSTEntry: s = \"%s\"\n", s);
326 uint32_t strSize = strlen(s);
328 *pTable += strSize + 1;
333 // Deposit a symbol table entry in the ELF Symbol Table
335 uint32_t DepositELFSymbol(uint8_t * ptr, uint32_t name, uint32_t addr, uint32_t size, uint8_t info, uint8_t other, uint16_t shndx)
349 // Write an object file to the passed in file descriptor
350 // N.B.: Return value is ignored...
352 int WriteObject(int fd)
354 LONG tds; // TEXT & DATA segment size
355 int i; // Temporary int
356 CHUNK * cp; // Chunk (for gather)
357 uint8_t * buf; // Scratch area
358 uint8_t * p; // Temporary ptr
359 LONG trsize, drsize; // Size of relocations
360 uint32_t unused; // For supressing 'write' warnings
364 printf("TEXT segment: %d bytes\n", sect[TEXT].sloc);
365 printf("DATA segment: %d bytes\n", sect[DATA].sloc);
366 printf("BSS segment: %d bytes\n", sect[BSS].sloc);
369 // Write requested object file...
370 if ((obj_format == BSD) || ((obj_format == ALCYON) && (prg_flag == 0)))
374 // Force BSD format (if it was ALCYON format)
379 printf("Total : %d bytes\n", sect[TEXT].sloc + sect[DATA].sloc + sect[BSS].sloc);
382 AssignSymbolNos(NULL, NULL); // Assign index numbers to the symbols
383 tds = sect[TEXT].sloc + sect[DATA].sloc; // Get size of TEXT and DATA segment
384 buf = malloc(0x800000); // Allocate 8MB object file image memory
388 error("cannot allocate object file memory (in BSD mode)");
392 memset(buf, 0, 0x800000); // Clear allocated memory
393 objImage = buf; // Set global object image pointer
394 strtable = malloc(0x200000); // Allocate 2MB string table buffer
396 if (strtable == NULL)
399 error("cannot allocate string table memory (in BSD mode)");
403 memset(strtable, 0, 0x200000); // Clear allocated memory
405 // Build object file header
406 chptr = buf; // Base of header (for D_foo macros)
409 D_long(0x00000107); // Magic number
410 D_long(sect[TEXT].sloc); // TEXT size
411 D_long(sect[DATA].sloc); // DATA size
412 D_long(sect[BSS].sloc); // BSS size
413 D_long(0x00000000); // Symbol size
414 D_long(0x00000000); // First entry (0L)
415 D_long(0x00000000); // TEXT relocation size
416 D_long(0x00000000); // DATA relocation size
418 // Construct TEXT and DATA segments (without relocation changes)
419 p = buf + BSDHDRSIZE;
421 for(i=TEXT; i<=DATA; i++)
423 for(cp=sect[i].sfcode; cp!=NULL; cp=cp->chnext)
425 memcpy(p, cp->chptr, cp->ch_size);
430 // Do relocation tables (and make changes to segment data)
431 p = buf + BSDHDRSIZE + tds; // Move obj image ptr to reloc info
432 trsize = MarkBSDImage(p, tds, sect[TEXT].sloc, TEXT);// Do TEXT relocation table
433 chptr = buf + 0x18; // Point to relocation hdr entry
434 D_long(trsize); // Write the relocation table size
436 // Move obj image ptr to reloc info
437 p = buf + BSDHDRSIZE + tds + trsize;
438 drsize = MarkBSDImage(p, tds, sect[TEXT].sloc, DATA);// Do DATA relocation table
439 chptr = buf + 0x1C; // Point to relocation hdr entry
440 D_long(drsize); // Write the relocation table size
442 // Point to start of symbol table
443 p = buf + BSDHDRSIZE + tds + trsize + drsize;
444 AssignSymbolNos(p, AddBSDSymEntry); // Build symbol and string tables
445 chptr = buf + 0x10; // Point to sym table size hdr entry
446 D_long(symsize); // Write the symbol table size
448 // Point to string table
449 p = buf + BSDHDRSIZE + tds + trsize + drsize + symsize;
450 memcpy(p, strtable, strindx); // Copy string table to object image
451 chptr = p; // Point to string table size long
452 D_long(strindx); // Write string table size
454 // Write the BSD object file from the object image buffer
455 unused = write(fd, buf, BSDHDRSIZE + tds + trsize + drsize + symsize + strindx + 4);
459 printf("TextRel size: %d bytes\n", trsize);
460 printf("DataRel size: %d bytes\n", drsize);
465 free(strtable); // Free allocated memory
466 free(buf); // Free allocated memory
469 else if (obj_format == ALCYON)
476 printf("TOS header : 28 bytes\n");
478 printf("Total : %d bytes\n", sect[TEXT].sloc + sect[DATA].sloc + sect[BSS].sloc + (prg_flag ? 28 : 0));
481 // Assign index numbers to the symbols, get # of symbols (we assume
482 // that all symbols can potentially be extended, hence the x28)
483 // (To clarify: 28 bytes is the size of an extended symbol)
484 uint32_t symbolMaxSize = AssignSymbolNos(NULL, NULL) * 28;
486 // Alloc memory for header + text + data, symbol and relocation
487 // information construction.
488 tds = sect[TEXT].sloc + sect[DATA].sloc;
489 buf = malloc(HDRSIZE + tds + symbolMaxSize);
491 // Build object file header just before the text+data image
492 chptr = buf; // -> base of header
494 challoc = HDRSIZE + tds + symbolMaxSize;
495 D_word(0x601A); // 00 - magic number
496 D_long(sect[TEXT].sloc); // 02 - TEXT size
497 D_long(sect[DATA].sloc); // 06 - DATA size
498 D_long(sect[BSS].sloc); // 0A - BSS size
499 D_long(0); // 0E - symbol table size (filled later)
500 D_long(0); // 12 - stack size (unused)
501 D_long(PRGFLAGS); // 16 - PRGFLAGS
502 D_word(0); // 1A - relocation information exists
504 // Construct text and data segments; fixup relocatable longs in .PRG
505 // mode; finally write the header + text + data
508 for(i=TEXT; i<=DATA; i++)
510 for(cp=sect[i].sfcode; cp!=NULL; cp=cp->chnext)
512 memcpy(p, cp->chptr, cp->ch_size);
517 // Do a first pass on the Alcyon image, if in PRG mode
519 MarkImage(buf + HDRSIZE, tds, sect[TEXT].sloc, 0);
521 // Construct symbol table and update the header entry, if necessary
524 // AssignSymbolNos with AddSymEntry updates symsize (stays 0 otherwise)
525 AssignSymbolNos(buf + HDRSIZE + tds, AddSymEntry);
526 chptr = buf + 0x0E; // Point to symbol table size entry
530 printf("Symbol table: %d bytes\n", symsize);
533 // Write out the header + text & data + symbol table (if any)
534 unused = write(fd, buf, HDRSIZE + tds + symsize);
536 // Construct and write relocation information; the size of it changes if
537 // we're writing a RELMODed executable. N.B.: Destroys buffer!
538 tds = MarkImage(buf, tds, sect[TEXT].sloc, 1);
539 unused = write(fd, buf, tds);
541 else if (obj_format == ELF)
543 // Allocate 6MB object file image memory
544 buf = malloc(0x600000);
548 error("cannot allocate object file memory (in ELF mode)");
552 memset(buf, 0, 0x600000);
553 objImage = buf; // Set global object image pointer
554 strtable = malloc(0x200000); // Allocate 2MB string table buffer
556 if (strtable == NULL)
558 error("cannot allocate string table memory (in ELF mode)");
562 memset(strtable, 0, 0x200000);
564 // This is pretty much a first pass at this shite, so there's room for
566 uint8_t headers[4 * 10 * 10]; // (DWORD * 10) = 1 hdr, 10 entries
568 uint8_t shstrtab[128]; // The section header string table proper
569 uint32_t shstTab[9]; // Index into shstrtab for strings
570 uint8_t * shstPtr = shstrtab; // Temp pointer
571 uint32_t shstSize = 0;
572 int numEntries = 4; // There are always at *least* 4 sections
573 int shstIndex = 1; // The section where the shstrtab lives
574 int elfSize = 0; // Size of the ELF object
575 // Clear the header numbers
576 memset(elfHdrNum, 0, 9 * sizeof(int));
579 // First step is to see what sections need to be made; we also
580 // construct the section header string table here at the same time.
582 shstTab[ES_NULL] = shstSize;
583 shstSize += DepositELFSHSTEntry(&shstPtr, "");
584 shstTab[ES_SHSTRTAB] = shstSize;
585 shstSize += DepositELFSHSTEntry(&shstPtr, ".shstrtab");
586 shstTab[ES_SYMTAB] = shstSize;
587 shstSize += DepositELFSHSTEntry(&shstPtr, ".symtab");
588 shstTab[ES_STRTAB] = shstSize;
589 shstSize += DepositELFSHSTEntry(&shstPtr, ".strtab");
591 if (sect[TEXT].sloc > 0)
593 elfHdrNum[ES_TEXT] = shstIndex;
594 shstTab[ES_TEXT] = shstSize;
595 shstSize += DepositELFSHSTEntry(&shstPtr, ".text");
600 if (sect[DATA].sloc > 0)
602 elfHdrNum[ES_DATA] = shstIndex;
603 shstTab[ES_DATA] = shstSize;
604 shstSize += DepositELFSHSTEntry(&shstPtr, ".data");
609 if (sect[BSS].sloc > 0)
611 elfHdrNum[ES_BSS] = shstIndex;
612 shstTab[ES_BSS] = shstSize;
613 shstSize += DepositELFSHSTEntry(&shstPtr, ".bss");
618 if (sect[TEXT].relocs > 0)
620 elfHdrNum[ES_RELATEXT] = shstIndex;
621 shstTab[ES_RELATEXT] = shstSize;
622 shstSize += DepositELFSHSTEntry(&shstPtr, ".relaTEXT");
627 if (sect[DATA].relocs > 0)
629 elfHdrNum[ES_RELADATA] = shstIndex;
630 shstTab[ES_RELADATA] = shstSize;
631 shstSize += DepositELFSHSTEntry(&shstPtr, ".relaDATA");
636 elfHdrNum[ES_SHSTRTAB] = shstIndex + 0;
637 elfHdrNum[ES_SYMTAB] = shstIndex + 1;
638 elfHdrNum[ES_STRTAB] = shstIndex + 2;
641 printf("ELF shstrtab size: %i bytes. Entries:\n", shstSize);
642 for(int j=0; j<i; j++)
643 printf("\"%s\"\n", shstrtab + shstTab[j]);
646 // Construct ELF header
647 // If you want to make any sense out of this you'd better take a look
648 // at Executable and Linkable Format on Wikipedia.
652 D_long(0x7F454C46); // 00 - "<7F>ELF" Magic Number
653 D_byte(0x01); // 04 - 32 vs 64 (1 = 32, 2 = 64)
654 D_byte(0x02); // 05 - Endianness (1 = LE, 2 = BE)
655 D_byte(0x01); // 06 - Original version of ELF (set to 1)
656 D_byte(0x00); // 07 - Target OS ABI (0 = System V)
657 D_byte(0x00); // 08 - ABI Extra (unneeded)
658 D_byte(0x00); // 09 - Pad bytes
661 D_word(0x01); // 10 - ELF Type (1 = relocatable)
662 D_word(0x04); // 12 - Architecture (EM_68K = 4, Motorola M68K family)
663 D_long(0x01); // 14 - Version (1 = original ELF)
664 D_long(0x00); // 18 - Entry point virtual address (unneeded)
665 D_long(0x00); // 1C - Program header table offset (unneeded)
666 D_long(0x00); // 20 - Section header table offset (to be determined)
670 // Specifically for 68000 CPU
671 D_long(0x01000000) // 24 - Processor-specific flags - EF_M68K_M68000
675 // CPUs other than 68000 (68020...)
676 D_long(0); // 24 - Processor-specific flags (ISA dependent)
679 D_word(0x0034); // 28 - ELF header size in bytes
680 D_word(0); // 2A - Program header table entry size
681 D_word(0); // 2C - Program header table entry count
682 D_word(0x0028); // 2E - Section header entry size - 40 bytes for ELF32
683 D_word(numEntries); // 30 - Section header table entry count
684 D_word(shstIndex); // 32 - Section header string table index
688 // Deposit section header 0 (NULL)
689 headerSize += DepositELFSectionHeader(headers + headerSize, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0);
691 int textLoc = elfSize;
693 // Construct TEXT section, if any
694 if (sect[TEXT].sloc > 0)
696 headerSize += DepositELFSectionHeader(headers + headerSize, shstTab[ES_TEXT], 1, 6, 0, elfSize, sect[TEXT].sloc, 0, 0, largestAlign[0], 0);
698 for(CHUNK * cp=sect[TEXT].sfcode; cp!=NULL; cp=cp->chnext)
700 memcpy(buf + elfSize, cp->chptr, cp->ch_size);
701 elfSize += cp->ch_size;
704 // Pad for next section (LONG boundary)
705 elfSize = (elfSize + 3) & ~3;
708 int dataLoc = elfSize;
710 // Construct DATA section, if any
711 if (sect[DATA].sloc > 0)
713 headerSize += DepositELFSectionHeader(headers + headerSize, shstTab[ES_DATA], 1, 3, 0, elfSize, sect[DATA].sloc, 0, 0, largestAlign[1], 0);
715 for(CHUNK * cp=sect[DATA].sfcode; cp!=NULL; cp=cp->chnext)
717 memcpy(buf + elfSize, cp->chptr, cp->ch_size);
718 elfSize += cp->ch_size;
721 // Pad for next section (LONG boundary)
722 elfSize = (elfSize + 3) & ~3;
725 // Construct BSS section, if any
726 if (sect[BSS].sloc > 0)
728 headerSize += DepositELFSectionHeader(headers + headerSize, shstTab[ES_BSS], 8, 3, 0, elfSize, sect[BSS].sloc, 0, 0, largestAlign[2], 0);
731 int textrelLoc = headerSize;
733 // Add headers for relocated sections, if any...
734 if (sect[TEXT].relocs > 0)
735 headerSize += DepositELFSectionHeader(headers + headerSize, shstTab[ES_RELATEXT], 4, 0x00, 0, 0, 0, elfHdrNum[ES_SYMTAB], elfHdrNum[ES_TEXT], 4, 0x0C);
737 int datarelLoc = headerSize;
739 if (sect[DATA].relocs > 0)
740 headerSize += DepositELFSectionHeader(headers + headerSize, shstTab[ES_RELADATA], 4, 0x40, 0, 0, 0, elfHdrNum[ES_SYMTAB], elfHdrNum[ES_DATA], 4, 0x0C);
743 headerSize += DepositELFSectionHeader(headers + headerSize, shstTab[ES_SHSTRTAB], 3, 0, 0, elfSize, shstSize, 0, 0, 1, 0);
744 memcpy(buf + elfSize, shstrtab, shstSize);
746 // Pad for next section (LONG boundary)
747 elfSize = (elfSize + 3) & ~3;
749 // Add section headers
750 int headerLoc = elfSize;
751 chptr = buf + 0x20; // Set section header offset in ELF header
753 elfSize += (4 * 10) * numEntries;
755 // Add symbol table & string table
756 int symtabLoc = elfSize;
757 strindx = 0; // Make sure we start at the beginning...
758 elfSize += DepositELFSymbol(buf + elfSize, 0, 0, 0, 0, 0, 0);
763 if (sect[TEXT].sloc > 0)
765 elfSize += DepositELFSymbol(buf + elfSize, 0, 0, 0, 3, 0, elfHdrNum[ES_TEXT]);
769 if (sect[DATA].sloc > 0)
771 elfSize += DepositELFSymbol(buf + elfSize, 0, 0, 0, 3, 0, elfHdrNum[ES_DATA]);
775 if (sect[BSS].sloc > 0)
777 elfSize += DepositELFSymbol(buf + elfSize, 0, 0, 0, 3, 0, elfHdrNum[ES_BSS]);
781 int numSymbols = AssignSymbolNosELF(buf + elfSize, AddELFSymEntry);
782 elfSize += numSymbols * 0x10;
785 int strtabLoc = elfSize;
786 memcpy(buf + elfSize, strtable, strindx);
788 // Pad for next section (LONG boundary)
789 elfSize = (elfSize + 3) & ~3;
791 headerSize += DepositELFSectionHeader(headers + headerSize, shstTab[ES_SYMTAB], 2, 0, 0, symtabLoc, (numSymbols + extraSyms) * 0x10, shstIndex + 2, firstglobal + extraSyms, 4, 0x10);
792 headerSize += DepositELFSectionHeader(headers + headerSize, shstTab[ES_STRTAB], 3, 0, 0, strtabLoc, strindx, 0, 0, 1, 0);
794 // Add relocation tables, if any (no need to align after these, they're
795 // already on DWORD boundaries)
796 if (sect[TEXT].relocs > 0)
798 uint32_t textrelSize = CreateELFRelocationRecord(buf + elfSize, buf + textLoc, TEXT);
799 // Deposit offset & size, now that we know them
800 chptr = headers + textrelLoc + 0x10;
803 elfSize += textrelSize;
806 if (sect[DATA].relocs > 0)
808 uint32_t datarelSize = CreateELFRelocationRecord(buf + elfSize, buf + dataLoc, DATA);
809 // Deposit offset & size, now that we know them
810 chptr = headers + datarelLoc + 0x10;
813 elfSize += datarelSize;
816 // Copy headers into the object
817 memcpy(buf + headerLoc, headers, headerSize);
819 // Finally, write out the object
820 unused = write(fd, buf, elfSize);
822 // Free allocated memory
829 else if (obj_format == XEX)
831 // Just write the object file
834 else if (obj_format == P56 || obj_format == LOD)
836 // Allocate 6MB object file image memory
837 uint8_t * buf = malloc(0x600000);
840 return error("cannot allocate object file memory (in P56/LOD mode)");
842 memset(buf, 0, 0x600000); // Clear allocated memory
844 // Iterate through DSP ram buffers
845 chptr = buf; // -> base of header
849 if (obj_format == LOD)
854 // Write all the things \o/
855 unused = write(fd, buf, chptr - buf);
860 else if (obj_format == RAW)
863 return error("cannot output absolute binary without a starting address (.org or command line)");
865 // Alloc memory for text + data construction.
866 tds = sect[TEXT].sloc + sect[DATA].sloc;
870 // Construct text and data segments; fixup relocatable longs;
871 // finally write the text + data
874 objImage = buf; // Set global object image pointer
876 for(i=TEXT; i<=DATA; i++)
878 for(cp=sect[i].sfcode; cp!=NULL; cp=cp->chnext)
880 memcpy(p, cp->chptr, cp->ch_size);
885 if (MarkABSImage(buf, tds, sect[TEXT].sloc, TEXT) != OK) // Do TEXT relocation table
889 if (MarkABSImage(buf, tds, sect[TEXT].sloc, DATA) != OK) // Do DATA relocation table
894 // Write out the header + text & data + symbol table (if any)
895 unused = write(fd, buf, tds);
901 static void WriteLOD(void)
903 D_printf("_START %s 0000 0000 0000 RMAC %01i.%01i.%01i\n\n", firstfname, MAJOR, MINOR, PATCH);
905 for(DSP_ORG * l=&dsp_orgmap[0]; l<dsp_currentorg; l++)
907 if (l->end != l->start)
911 case ORG_P: D_printf("_DATA P %.4X\n", l->orgadr); break;
912 case ORG_X: D_printf("_DATA X %.4X\n", l->orgadr); break;
913 case ORG_Y: D_printf("_DATA Y %.4X\n", l->orgadr); break;
914 case ORG_L: D_printf("_DATA L %.4X\n", l->orgadr); break;
916 error("Internal error: unknown DSP56001 org'd section");
920 CHUNK * cp = l->chunk;
921 uint8_t * p_chunk = l->start;
922 uint8_t * p_chunk_end = p_chunk;
925 while (p_chunk_end != l->end)
927 if (l->end < (cp->chptr + cp->ch_size) && l->end > cp->chptr)
929 // If the end of the section is inside the current chunk, just dump everything and stop
930 p_chunk_end = l->end;
934 // 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
935 p_chunk_end = cp->chptr + cp->ch_size;
938 uint32_t count = (uint32_t)(p_chunk_end - p_chunk);
940 for(uint32_t i=0; i<count; i+=3)
944 D_printf("%.6X ", (((p_chunk[0] << 8) | p_chunk[1]) << 8) | p_chunk[2]);
948 D_printf("%.6X\n", (((p_chunk[0] << 8) | p_chunk[1]) << 8) | p_chunk[2]);
955 cp = cp->chnext; // Advance chunk
958 p_chunk = cp->chptr; // Set dump pointer to start of this chunk
966 // Dump the symbol table into the buf
969 D_printf("\n_END %.4X\n", dsp_orgmap[0].orgadr);
972 static void WriteP56(void)
974 for(DSP_ORG * l=&dsp_orgmap[0]; l<dsp_currentorg; l++)
976 if (l->end == l->start)
979 if ((l->memtype < ORG_P) || (l->memtype > ORG_L))
981 error("Internal error: unknown DSP56001 org'd section");
985 CHUNK * cp = l->chunk;
986 uint8_t * p_chunk = l->start;
987 uint8_t * p_chunk_end = p_chunk;
989 // Memory type (P, X, Y or L)
992 // Chunk start address (in DSP words)
995 // Chunk length (in DSP words)
996 // We'll fill this field after we write the chunk so we can calculate
997 // how long it is (so if the chunk is split into different CHUNKs we
998 // can deal with this during copy)
999 uint8_t * p_buf_len = chptr;
1003 uint32_t chunk_size = 0;
1005 while (p_chunk_end != l->end)
1007 if (l->end < (cp->chptr + cp->ch_size) && l->end > cp->chptr)
1009 // If the end of the section is inside the current chunk, just
1010 // dump everything and stop
1011 p_chunk_end = l->end;
1015 // If the end of the section is not inside the current chunk,
1016 // just dump everything from the current chunk and move on to
1018 p_chunk_end = cp->chptr + cp->ch_size;
1021 uint32_t current_chunk_size = p_chunk_end - p_chunk;
1022 chunk_size += current_chunk_size;
1023 memcpy(chptr, p_chunk, current_chunk_size);
1024 chptr += current_chunk_size;
1026 cp = cp->chnext; // Advance chunk
1029 p_chunk = cp->chptr; // Set dump pointer to start of this chunk
1032 // Now we can mark the chunk's length (DSP word size is 24-bits, so
1033 // the byte count needs to be divided by 3)
1034 SETBE24(p_buf_len, chunk_size / 3);