// // RMAC - Renamed Macro Assembler for all Atari computers // OBJECT.C - Writing Object Files // Copyright (C) 199x Landon Dyer, 2011-2022 Reboot and Friends // RMAC derived from MADMAC v1.07 Written by Landon Dyer, 1986 // Source utilised with the kind permission of Landon Dyer // #include "object.h" #include "6502.h" #include "direct.h" #include "dsp56k.h" #include "error.h" #include "mark.h" #include "riscasm.h" #include "sect.h" #include "symbol.h" #include "version.h" //#define DEBUG_ELF uint32_t symsize = 0; // Size of BSD/ELF symbol table uint32_t strindx = 0x00000004; // BSD/ELF string table index uint8_t * strtable; // Pointer to the symbol string table uint8_t * objImage; // Global object image pointer int elfHdrNum[9] = { 0, 0, 0, 0, 0, 0, 0, 0, 0 }; uint32_t extraSyms; static uint16_t tdb_tab[] = { 0, // absolute AL_TEXT, // TEXT segment based AL_DATA, 0, // DATA segment based AL_BSS // BSS segment based }; uint32_t PRGFLAGS; /* PRGFLAGS as defined in Atari Compendium Chapter 2 Definition Bit(s) Meaning --------------- ------- -------------------------------------------------------- PF_FASTLOAD 0 If set, clear only the BSS area on program load, otherwise clear the entire heap. PF_TTRAMLOAD 1 If set, the program may be loaded into alternative RAM, otherwise it must be loaded into standard RAM. PF_TTRAMMEM 2 If set, the program's Malloc() requests may be satisfied from alternative RAM, otherwise they must be satisfied from standard RAM. - 3 Currently unused See left. 4 & 5 If these bits are set to 0 (PF_PRIVATE), the processes' entire memory space will be considered private (when memory protection is enabled).If these bits are set to 1 (PF_GLOBAL), the processes' entire memory space will be readable and writable by any process (i.e. global). If these bits are set to 2 (PF_SUPERVISOR), the processes' entire memory space will only be readable and writable by itself and any other process in supervisor mode.If these bits are set to 3 (PF_READABLE), the processes' entire memory space will be readable by any application but only writable by itself. - 6-15 Currently unused */ // Internal function prototypes static void WriteLOD(void); static void WriteP56(void); // // Add entry to symbol table (in ALCYON mode) // If 'globflag' is 1, make the symbol global // If in .PRG mode, adjust symbol values for fake link // uint8_t * AddSymEntry(register uint8_t * buf, SYM * sym, int globflag) { // Copy symbol name to buffer (first 8 chars or less) register uint8_t * s = sym->sname; register int i; uint32_t extra = 0; for(i=0; i<8 && *s; i++) *buf++ = *s++; while (i++ < 8) *buf++ = '\0'; register uint16_t w1 = sym->sattr; register uint16_t w = AL_DEFINED | tdb_tab[w1 & TDB]; if (prg_flag == 3) { // Extended symbol - Check to see if symbol is larger than 8 characters // and write an extra 14 characters where the next symbol would be. // Modify the flag word for this if (*s) { //printf("%s '%i' - will write extended symbol\n", sym->sname,s[0]); uint8_t *buf2 = buf + 6; for(i=8; i<8+14 && *s; i++) *buf2++ = *s++; while (i++ < 8 + 14) *buf2++ = '\0'; symsize += 14; w |= 0x48; extra = 14; } } // // Construct and deposit flag word // // o all symbols are AL_DEFINED // o install T/D/B/A base // o install 'equated' // o commons (COMMON) are AL_EXTERN, but not BSS // o exports (DEFINED) are AL_GLOBAL // o imports (~DEFINED) are AL_EXTERN // if (w1 & EQUATED) // Equated w |= AL_EQUATED; if (w1 & COMMON) { w |= AL_EXTERN | AL_GLOBAL; // Common symbol w &= ~AL_BSS; // They're not BSS in Alcyon object files } if (w1 & DEFINED) { if (globflag) // Export the symbol w |= AL_GLOBAL; } else w |= AL_EXTERN; // Imported symbol SETBE16(buf, 0, w); buf += 2; register uint32_t z = (uint32_t)sym->svalue; if (prg_flag) // Relocate value in .PRG segment { w1 &= DATA | BSS; if (w1) z += sect[TEXT].sloc; if (w1 & BSS) z += sect[DATA].sloc; } SETBE32(buf, 0, z); // Deposit symbol value buf += 4; symsize += 14; buf += extra; return buf; } // // Add an entry to the BSD symbol table // // From stab.def (https://sites.uclouvain.be/SystInfo/usr/include/bits/stab.def.html): /* _________________________________________________ | 00 - 1F are not dbx stab symbols | | In most cases, the low bit is the EXTernal bit| | 00 UNDEF | 02 ABS | 04 TEXT | 06 DATA | | 01 |EXT | 03 |EXT | 05 |EXT | 07 |EXT | | 08 BSS | 0A INDR | 0C FN_SEQ | 0E WEAKA | | 09 |EXT | 0B | 0D WEAKU | 0F WEAKT | | 10 WEAKD | 12 COMM | 14 SETA | 16 SETT | | 11 WEAKB | 13 | 15 | 17 | | 18 SETD | 1A SETB | 1C SETV | 1E WARNING| | 19 | 1B | 1D | 1F FN | */ uint8_t * AddBSDSymEntry(uint8_t * buf, SYM * sym, int globflag) { chptr = buf; // Point to buffer for depositing longs if (sym->sname) { D_long(strindx); // Deposit the symbol string index } else { D_long(0); // Deposit special NULL string index } uint16_t w1 = sym->sattr; // Obtain symbol attributes uint32_t z = 0; // Initialize resulting symbol flags if (sym->stype == DBGSYM) { // Debug symbols hard-code the a.out symbol type in the st_type field // and can include additional type-specific data in the a.out symbol // "other" and "description" fields, both packed into this same dword. z = sym->st_type << 24; z |= sym->st_other << 16; z |= sym->st_desc; } else { // Translate rmac symbol attributes to an a.out symbol type. if (w1 & EQUATED) { z = 0x02000000; // Set equated flag } // If a symbol is both EQUd and flagged as TBD then we let the latter // take precedence. Otherwise the linker will not even bother trying to // relocate the address during link time. switch (w1 & TDB) { case TEXT: z = 0x04000000; break; // Set TEXT segment flag case DATA: z = 0x06000000; break; // Set DATA segment flag case BSS : z = 0x08000000; break; // Set BSS segment flag } if (globflag) z |= 0x01000000; // Set global flag if requested } D_long(z); // Deposit symbol attribute z = sym->svalue; // Obtain symbol value if (w1 & (DATA | BSS)) z += sect[TEXT].sloc; // If DATA or BSS add TEXT segment size if (w1 & BSS) z += sect[DATA].sloc; // If BSS add DATA segment size D_long(z); // Deposit symbol value if (sym->sname) { strcpy(strtable + strindx, sym->sname); strindx += strlen(sym->sname) + 1; // Incr string index incl null terminate } buf += 12; // Increment buffer to next record symsize += 12; // Increment symbol table size return buf; } // // Add entry to ELF symbol table; if `globflag' is 1, make the symbol global // uint8_t * AddELFSymEntry(uint8_t * buf, SYM * sym, int globflag) { chptr = buf; ch_size = 0; D_long(strindx); // st_name D_long(sym->svalue); // st_value D_long(0); // st_size uint8_t st_info = 0; register WORD w1 = sym->sattr; if (w1 & DEFINED) { if (globflag) // Export the symbol st_info |= 16; // STB_GLOBAL (1<<4) } else if (w1 & (GLOBAL | REFERENCED)) st_info |= 16; D_byte(st_info); D_byte(0); // st_other uint16_t st_shndx = SHN_ABS; // Assume absolute (equated) number if (w1 & TEXT) st_shndx = elfHdrNum[ES_TEXT]; else if (w1 & DATA) st_shndx = elfHdrNum[ES_DATA]; else if (w1 & BSS) st_shndx = elfHdrNum[ES_BSS]; else if (globflag && !(w1 & DEFINED) && (w1 & REFERENCED)) { st_shndx = SHN_UNDEF; } // If the symbol is global then probably we // don't need to do anything (probably) // since we set STB_GLOBAL in st_info above. // Unless we need to set it to SHN_COMMON? D_word(st_shndx); strcpy(strtable + strindx, sym->sname); strindx += strlen(sym->sname) + 1; // Incr string index incl null terminate symsize += 0x10; // Increment symbol table size return buf + 0x10; } // // Helper function for ELF output // 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) { chptr = ptr; ch_size = 0; D_long(name); D_long(type); D_long(flags); D_long(addr); D_long(offset); D_long(size); D_long(link); D_long(info); D_long(addralign); D_long(entsize); return 40; } // // Deposit an entry in the Section Header string table // uint32_t DepositELFSHSTEntry(uint8_t ** pTable, const uint8_t * s) { #ifdef DEBUG_ELF printf("DepositELFSHSTEntry: s = \"%s\"\n", s); #endif uint32_t strSize = strlen(s); strcpy(*pTable, s); *pTable += strSize + 1; return strSize + 1; } // // Deposit a symbol table entry in the ELF Symbol Table // uint32_t DepositELFSymbol(uint8_t * ptr, uint32_t name, uint32_t addr, uint32_t size, uint8_t info, uint8_t other, uint16_t shndx) { chptr = ptr; ch_size = 0; D_long(name); D_long(addr); D_long(size); *chptr++ = info; *chptr++ = other; D_word(shndx); return 16; } // // Write an object file to the passed in file descriptor // N.B.: Return value is ignored... // int WriteObject(int fd) { LONG tds; // TEXT & DATA segment size int i; // Temporary int CHUNK * cp; // Chunk (for gather) uint8_t * buf; // Scratch area uint8_t * p; // Temporary ptr LONG trsize, drsize; // Size of relocations uint32_t unused; // For supressing 'write' warnings if (verb_flag) { printf("TEXT segment: %d bytes\n", sect[TEXT].sloc); printf("DATA segment: %d bytes\n", sect[DATA].sloc); printf("BSS segment: %d bytes\n", sect[BSS].sloc); } // Write requested object file... if ((obj_format == BSD) || ((obj_format == ALCYON) && (prg_flag == 0))) { ch_size = 0; // Force BSD format (if it was ALCYON format) obj_format = BSD; if (verb_flag) { printf("Total : %d bytes\n", sect[TEXT].sloc + sect[DATA].sloc + sect[BSS].sloc); } AssignSymbolNos(NULL, NULL); // Assign index numbers to the symbols tds = sect[TEXT].sloc + sect[DATA].sloc; // Get size of TEXT and DATA segment buf = malloc(0x800000); // Allocate 8MB object file image memory if (buf == NULL) { error("cannot allocate object file memory (in BSD mode)"); return ERROR; } memset(buf, 0, 0x800000); // Clear allocated memory objImage = buf; // Set global object image pointer strtable = malloc(0x200000); // Allocate 2MB string table buffer if (strtable == NULL) { free(buf); error("cannot allocate string table memory (in BSD mode)"); return ERROR; } memset(strtable, 0, 0x200000); // Clear allocated memory // Build object file header chptr = buf; // Base of header (for D_foo macros) ch_size = 0; challoc = 0x800000; D_long(0x00000107); // Magic number D_long(sect[TEXT].sloc); // TEXT size D_long(sect[DATA].sloc); // DATA size D_long(sect[BSS].sloc); // BSS size D_long(0x00000000); // Symbol size D_long(0x00000000); // First entry (0L) D_long(0x00000000); // TEXT relocation size D_long(0x00000000); // DATA relocation size // Construct TEXT and DATA segments (without relocation changes) p = buf + BSDHDRSIZE; for(i=TEXT; i<=DATA; i++) { for(cp=sect[i].sfcode; cp!=NULL; cp=cp->chnext) { memcpy(p, cp->chptr, cp->ch_size); p += cp->ch_size; } } // Do relocation tables (and make changes to segment data) p = buf + BSDHDRSIZE + tds; // Move obj image ptr to reloc info trsize = MarkBSDImage(p, tds, sect[TEXT].sloc, TEXT);// Do TEXT relocation table chptr = buf + 0x18; // Point to relocation hdr entry D_long(trsize); // Write the relocation table size // Move obj image ptr to reloc info p = buf + BSDHDRSIZE + tds + trsize; drsize = MarkBSDImage(p, tds, sect[TEXT].sloc, DATA);// Do DATA relocation table chptr = buf + 0x1C; // Point to relocation hdr entry D_long(drsize); // Write the relocation table size // Point to start of symbol table p = buf + BSDHDRSIZE + tds + trsize + drsize; AssignSymbolNos(p, AddBSDSymEntry); // Build symbol and string tables chptr = buf + 0x10; // Point to sym table size hdr entry D_long(symsize); // Write the symbol table size // Point to string table p = buf + BSDHDRSIZE + tds + trsize + drsize + symsize; memcpy(p, strtable, strindx); // Copy string table to object image chptr = p; // Point to string table size long D_long(strindx); // Write string table size // Write the BSD object file from the object image buffer unused = write(fd, buf, BSDHDRSIZE + tds + trsize + drsize + symsize + strindx + 4); if (verb_flag) { printf("TextRel size: %d bytes\n", trsize); printf("DataRel size: %d bytes\n", drsize); } if (buf) { free(strtable); // Free allocated memory free(buf); // Free allocated memory } } else if (obj_format == ALCYON) { ch_size = 0; if (verb_flag) { if (prg_flag) printf("TOS header : 28 bytes\n"); printf("Total : %d bytes\n", sect[TEXT].sloc + sect[DATA].sloc + sect[BSS].sloc + (prg_flag ? 28 : 0)); } // Assign index numbers to the symbols, get # of symbols (we assume // that all symbols can potentially be extended, hence the x28) // (To clarify: 28 bytes is the size of an extended symbol) uint32_t symbolMaxSize = AssignSymbolNos(NULL, NULL) * 28; // Alloc memory for header + text + data, symbol and relocation // information construction. tds = sect[TEXT].sloc + sect[DATA].sloc; buf = malloc(HDRSIZE + tds + symbolMaxSize); // Build object file header just before the text+data image chptr = buf; // -> base of header ch_size = 0; challoc = HDRSIZE + tds + symbolMaxSize; D_word(0x601A); // 00 - magic number D_long(sect[TEXT].sloc); // 02 - TEXT size D_long(sect[DATA].sloc); // 06 - DATA size D_long(sect[BSS].sloc); // 0A - BSS size D_long(0); // 0E - symbol table size (filled later) D_long(0); // 12 - stack size (unused) D_long(PRGFLAGS); // 16 - PRGFLAGS D_word(0); // 1A - relocation information exists // Construct text and data segments; fixup relocatable longs in .PRG // mode; finally write the header + text + data p = buf + HDRSIZE; for(i=TEXT; i<=DATA; i++) { for(cp=sect[i].sfcode; cp!=NULL; cp=cp->chnext) { memcpy(p, cp->chptr, cp->ch_size); p += cp->ch_size; } } // Do a first pass on the Alcyon image, if in PRG mode if (prg_flag) MarkImage(buf + HDRSIZE, tds, sect[TEXT].sloc, 0); // Construct symbol table and update the header entry, if necessary if (prg_flag > 1) { // AssignSymbolNos with AddSymEntry updates symsize (stays 0 otherwise) AssignSymbolNos(buf + HDRSIZE + tds, AddSymEntry); chptr = buf + 0x0E; // Point to symbol table size entry D_long(symsize); if (verb_flag) printf("Symbol table: %d bytes\n", symsize); } // Write out the header + text & data + symbol table (if any) unused = write(fd, buf, HDRSIZE + tds + symsize); // Construct and write relocation information; the size of it changes if // we're writing a RELMODed executable. N.B.: Destroys buffer! tds = MarkImage(buf, tds, sect[TEXT].sloc, 1); unused = write(fd, buf, tds); } else if (obj_format == ELF) { // Allocate 6MB object file image memory buf = malloc(0x600000); if (buf == NULL) { error("cannot allocate object file memory (in ELF mode)"); return ERROR; } memset(buf, 0, 0x600000); objImage = buf; // Set global object image pointer strtable = malloc(0x200000); // Allocate 2MB string table buffer if (strtable == NULL) { error("cannot allocate string table memory (in ELF mode)"); return ERROR; } memset(strtable, 0, 0x200000); // This is pretty much a first pass at this shite, so there's room for // improvement. :-P uint8_t headers[4 * 10 * 10]; // (DWORD * 10) = 1 hdr, 10 entries int headerSize = 0; uint8_t shstrtab[128]; // The section header string table proper uint32_t shstTab[9]; // Index into shstrtab for strings uint8_t * shstPtr = shstrtab; // Temp pointer uint32_t shstSize = 0; int numEntries = 4; // There are always at *least* 4 sections int shstIndex = 1; // The section where the shstrtab lives int elfSize = 0; // Size of the ELF object // Clear the header numbers memset(elfHdrNum, 0, 9 * sizeof(int)); // // First step is to see what sections need to be made; we also // construct the section header string table here at the same time. // shstTab[ES_NULL] = shstSize; shstSize += DepositELFSHSTEntry(&shstPtr, ""); shstTab[ES_SHSTRTAB] = shstSize; shstSize += DepositELFSHSTEntry(&shstPtr, ".shstrtab"); shstTab[ES_SYMTAB] = shstSize; shstSize += DepositELFSHSTEntry(&shstPtr, ".symtab"); shstTab[ES_STRTAB] = shstSize; shstSize += DepositELFSHSTEntry(&shstPtr, ".strtab"); if (sect[TEXT].sloc > 0) { elfHdrNum[ES_TEXT] = shstIndex; shstTab[ES_TEXT] = shstSize; shstSize += DepositELFSHSTEntry(&shstPtr, ".text"); shstIndex++; numEntries++; } if (sect[DATA].sloc > 0) { elfHdrNum[ES_DATA] = shstIndex; shstTab[ES_DATA] = shstSize; shstSize += DepositELFSHSTEntry(&shstPtr, ".data"); shstIndex++; numEntries++; } if (sect[BSS].sloc > 0) { elfHdrNum[ES_BSS] = shstIndex; shstTab[ES_BSS] = shstSize; shstSize += DepositELFSHSTEntry(&shstPtr, ".bss"); shstIndex++; numEntries++; } if (sect[TEXT].relocs > 0) { elfHdrNum[ES_RELATEXT] = shstIndex; shstTab[ES_RELATEXT] = shstSize; shstSize += DepositELFSHSTEntry(&shstPtr, ".relaTEXT"); shstIndex++; numEntries++; } if (sect[DATA].relocs > 0) { elfHdrNum[ES_RELADATA] = shstIndex; shstTab[ES_RELADATA] = shstSize; shstSize += DepositELFSHSTEntry(&shstPtr, ".relaDATA"); shstIndex++; numEntries++; } elfHdrNum[ES_SHSTRTAB] = shstIndex + 0; elfHdrNum[ES_SYMTAB] = shstIndex + 1; elfHdrNum[ES_STRTAB] = shstIndex + 2; #ifdef DEBUG_ELF printf("ELF shstrtab size: %i bytes. Entries:\n", shstSize); for(int j=0; jELF" Magic Number D_byte(0x01); // 04 - 32 vs 64 (1 = 32, 2 = 64) D_byte(0x02); // 05 - Endianness (1 = LE, 2 = BE) D_byte(0x01); // 06 - Original version of ELF (set to 1) D_byte(0x00); // 07 - Target OS ABI (0 = System V) D_byte(0x00); // 08 - ABI Extra (unneeded) D_byte(0x00); // 09 - Pad bytes D_word(0x00); D_long(0x00); D_word(0x01); // 10 - ELF Type (1 = relocatable) D_word(0x04); // 12 - Architecture (EM_68K = 4, Motorola M68K family) D_long(0x01); // 14 - Version (1 = original ELF) D_long(0x00); // 18 - Entry point virtual address (unneeded) D_long(0x00); // 1C - Program header table offset (unneeded) D_long(0x00); // 20 - Section header table offset (to be determined) if (0) { // Specifically for 68000 CPU D_long(0x01000000) // 24 - Processor-specific flags - EF_M68K_M68000 } else { // CPUs other than 68000 (68020...) D_long(0); // 24 - Processor-specific flags (ISA dependent) } D_word(0x0034); // 28 - ELF header size in bytes D_word(0); // 2A - Program header table entry size D_word(0); // 2C - Program header table entry count D_word(0x0028); // 2E - Section header entry size - 40 bytes for ELF32 D_word(numEntries); // 30 - Section header table entry count D_word(shstIndex); // 32 - Section header string table index elfSize += 0x34; // Deposit section header 0 (NULL) headerSize += DepositELFSectionHeader(headers + headerSize, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0); int textLoc = elfSize; // Construct TEXT section, if any if (sect[TEXT].sloc > 0) { headerSize += DepositELFSectionHeader(headers + headerSize, shstTab[ES_TEXT], 1, 6, 0, elfSize, sect[TEXT].sloc, 0, 0, largestAlign[0], 0); for(CHUNK * cp=sect[TEXT].sfcode; cp!=NULL; cp=cp->chnext) { memcpy(buf + elfSize, cp->chptr, cp->ch_size); elfSize += cp->ch_size; } // Pad for next section (LONG boundary) elfSize = (elfSize + 3) & ~3; } int dataLoc = elfSize; // Construct DATA section, if any if (sect[DATA].sloc > 0) { headerSize += DepositELFSectionHeader(headers + headerSize, shstTab[ES_DATA], 1, 3, 0, elfSize, sect[DATA].sloc, 0, 0, largestAlign[1], 0); for(CHUNK * cp=sect[DATA].sfcode; cp!=NULL; cp=cp->chnext) { memcpy(buf + elfSize, cp->chptr, cp->ch_size); elfSize += cp->ch_size; } // Pad for next section (LONG boundary) elfSize = (elfSize + 3) & ~3; } // Construct BSS section, if any if (sect[BSS].sloc > 0) { headerSize += DepositELFSectionHeader(headers + headerSize, shstTab[ES_BSS], 8, 3, 0, elfSize, sect[BSS].sloc, 0, 0, largestAlign[2], 0); } int textrelLoc = headerSize; // Add headers for relocated sections, if any... if (sect[TEXT].relocs > 0) headerSize += DepositELFSectionHeader(headers + headerSize, shstTab[ES_RELATEXT], 4, 0x00, 0, 0, 0, elfHdrNum[ES_SYMTAB], elfHdrNum[ES_TEXT], 4, 0x0C); int datarelLoc = headerSize; if (sect[DATA].relocs > 0) headerSize += DepositELFSectionHeader(headers + headerSize, shstTab[ES_RELADATA], 4, 0x40, 0, 0, 0, elfHdrNum[ES_SYMTAB], elfHdrNum[ES_DATA], 4, 0x0C); // Add shstrtab headerSize += DepositELFSectionHeader(headers + headerSize, shstTab[ES_SHSTRTAB], 3, 0, 0, elfSize, shstSize, 0, 0, 1, 0); memcpy(buf + elfSize, shstrtab, shstSize); elfSize += shstSize; // Pad for next section (LONG boundary) elfSize = (elfSize + 3) & ~3; // Add section headers int headerLoc = elfSize; chptr = buf + 0x20; // Set section header offset in ELF header D_long(headerLoc); elfSize += (4 * 10) * numEntries; // Add symbol table & string table int symtabLoc = elfSize; strindx = 0; // Make sure we start at the beginning... elfSize += DepositELFSymbol(buf + elfSize, 0, 0, 0, 0, 0, 0); *strtable = 0; strindx++; extraSyms = 1; if (sect[TEXT].sloc > 0) { elfSize += DepositELFSymbol(buf + elfSize, 0, 0, 0, 3, 0, elfHdrNum[ES_TEXT]); extraSyms++; } if (sect[DATA].sloc > 0) { elfSize += DepositELFSymbol(buf + elfSize, 0, 0, 0, 3, 0, elfHdrNum[ES_DATA]); extraSyms++; } if (sect[BSS].sloc > 0) { elfSize += DepositELFSymbol(buf + elfSize, 0, 0, 0, 3, 0, elfHdrNum[ES_BSS]); extraSyms++; } int numSymbols = AssignSymbolNosELF(buf + elfSize, AddELFSymEntry); elfSize += numSymbols * 0x10; // String table int strtabLoc = elfSize; memcpy(buf + elfSize, strtable, strindx); elfSize += strindx; // Pad for next section (LONG boundary) elfSize = (elfSize + 3) & ~3; headerSize += DepositELFSectionHeader(headers + headerSize, shstTab[ES_SYMTAB], 2, 0, 0, symtabLoc, (numSymbols + extraSyms) * 0x10, shstIndex + 2, firstglobal + extraSyms, 4, 0x10); headerSize += DepositELFSectionHeader(headers + headerSize, shstTab[ES_STRTAB], 3, 0, 0, strtabLoc, strindx, 0, 0, 1, 0); // Add relocation tables, if any (no need to align after these, they're // already on DWORD boundaries) if (sect[TEXT].relocs > 0) { uint32_t textrelSize = CreateELFRelocationRecord(buf + elfSize, buf + textLoc, TEXT); // Deposit offset & size, now that we know them chptr = headers + textrelLoc + 0x10; D_long(elfSize); D_long(textrelSize); elfSize += textrelSize; } if (sect[DATA].relocs > 0) { uint32_t datarelSize = CreateELFRelocationRecord(buf + elfSize, buf + dataLoc, DATA); // Deposit offset & size, now that we know them chptr = headers + datarelLoc + 0x10; D_long(elfSize); D_long(datarelSize); elfSize += datarelSize; } // Copy headers into the object memcpy(buf + headerLoc, headers, headerSize); // Finally, write out the object unused = write(fd, buf, elfSize); // Free allocated memory if (buf) { free(buf); free(strtable); } } else if (obj_format == XEX) { // Just write the object file m6502obj(fd); } else if (obj_format == C64PRG) { // Just write the object file m6502c64(fd); } else if (obj_format == P56 || obj_format == LOD) { // Allocate 6MB object file image memory uint8_t * buf = malloc(0x600000); if (buf == NULL) return error("cannot allocate object file memory (in P56/LOD mode)"); memset(buf, 0, 0x600000); // Clear allocated memory // Iterate through DSP ram buffers chptr = buf; // -> base of header ch_size = 0; challoc = 0x600000; if (obj_format == LOD) WriteLOD(); else WriteP56(); // Write all the things \o/ unused = write(fd, buf, chptr - buf); if (buf) free(buf); } else if (obj_format == RAW) { if (!org68k_active && used_architectures & (!(M6502 | M56001P | M56001X | M56001Y | M56001L))) return error("cannot output absolute binary without a starting address (.org or command line)"); if (used_architectures & M6502) { // Okay, this is not the best. But it'll have to do until we revamp things a bit with sections. // Basically we assume that if raw output is requested and 6502 mode was switched on, nobody // switched to other architectures. The combination doesn't make much sense anyway for now. m6502raw(fd); return 0; } // Alloc memory for text + data construction. tds = sect[TEXT].sloc + sect[DATA].sloc; buf = malloc(tds); chptr = buf; // Construct text and data segments; fixup relocatable longs; // finally write the text + data p = buf; objImage = buf; // Set global object image pointer for(i=TEXT; i<=DATA; i++) { for(cp=sect[i].sfcode; cp!=NULL; cp=cp->chnext) { memcpy(p, cp->chptr, cp->ch_size); p += cp->ch_size; } } if (MarkABSImage(buf, tds, sect[TEXT].sloc, TEXT) != OK) // Do TEXT relocation table { return ERROR; } if (MarkABSImage(buf, tds, sect[TEXT].sloc, DATA) != OK) // Do DATA relocation table { return ERROR; } // Write out the header + text & data + symbol table (if any) unused = write(fd, buf, tds); } return 0; } static void WriteLOD(void) { D_printf("_START %s 0000 0000 0000 RMAC %01i.%01i.%01i\n\n", firstfname, MAJOR, MINOR, PATCH); for(DSP_ORG * l=&dsp_orgmap[0]; lend != l->start) { switch (l->memtype) { case ORG_P: D_printf("_DATA P %.4X\n", l->orgadr); break; case ORG_X: D_printf("_DATA X %.4X\n", l->orgadr); break; case ORG_Y: D_printf("_DATA Y %.4X\n", l->orgadr); break; case ORG_L: D_printf("_DATA L %.4X\n", l->orgadr); break; default: error("Internal error: unknown DSP56001 org'd section"); return; } CHUNK * cp = l->chunk; uint8_t * p_chunk = l->start; uint8_t * p_chunk_end = p_chunk; uint32_t j = 0; while (p_chunk_end != l->end) { if (l->end < (cp->chptr + cp->ch_size) && l->end > cp->chptr) { // If the end of the section is inside the current chunk, just dump everything and stop p_chunk_end = l->end; } else { // 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 p_chunk_end = cp->chptr + cp->ch_size; } uint32_t count = (uint32_t)(p_chunk_end - p_chunk); for(uint32_t i=0; ichnext; // Advance chunk if (cp != NULL) p_chunk = cp->chptr; // Set dump pointer to start of this chunk } if ((j & 7) != 0) D_printf("\n"); } } // Dump the symbol table into the buf DumpLODSymbols(); D_printf("\n_END %.4X\n", dsp_orgmap[0].orgadr); } static void WriteP56(void) { for(DSP_ORG * l=&dsp_orgmap[0]; lend == l->start) continue; if ((l->memtype < ORG_P) || (l->memtype > ORG_L)) { error("Internal error: unknown DSP56001 org'd section"); return; } CHUNK * cp = l->chunk; uint8_t * p_chunk = l->start; uint8_t * p_chunk_end = p_chunk; // Memory type (P, X, Y or L) D_dsp(l->memtype); // Chunk start address (in DSP words) D_dsp(l->orgadr); // Chunk length (in DSP words) // We'll fill this field after we write the chunk so we can calculate // how long it is (so if the chunk is split into different CHUNKs we // can deal with this during copy) uint8_t * p_buf_len = chptr; chptr += 3; // The chunk itself uint32_t chunk_size = 0; while (p_chunk_end != l->end) { if (l->end < (cp->chptr + cp->ch_size) && l->end > cp->chptr) { // If the end of the section is inside the current chunk, just // dump everything and stop p_chunk_end = l->end; } else { // 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 p_chunk_end = cp->chptr + cp->ch_size; } uint32_t current_chunk_size = p_chunk_end - p_chunk; chunk_size += current_chunk_size; memcpy(chptr, p_chunk, current_chunk_size); chptr += current_chunk_size; cp = cp->chnext; // Advance chunk if (cp != NULL) p_chunk = cp->chptr; // Set dump pointer to start of this chunk } // Now we can mark the chunk's length (DSP word size is 24-bits, so // the byte count needs to be divided by 3) SETBE24(p_buf_len, chunk_size / 3); } }