X-Git-Url: http://shamusworld.gotdns.org/cgi-bin/gitweb.cgi?p=rmac;a=blobdiff_plain;f=object.c;h=fe107434f9c835538a4bbe8dce2a4233d5f1a413;hp=d8b4b577017d2729031544cf7639325960a65bdb;hb=HEAD;hpb=d0c28c349ddfb8393568037f68bddbe8979ce0df diff --git a/object.c b/object.c index d8b4b57..6dbf9c5 100644 --- a/object.c +++ b/object.c @@ -1,75 +1,349 @@ // -// RMAC - Reboot's Macro Assembler for the Atari Jaguar Console System +// RMAC - Renamed Macro Assembler for all Atari computers // OBJECT.C - Writing Object Files -// Copyright (C) 199x Landon Dyer, 2011 Reboot and Friends +// 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 "sect.h" -#include "symbol.h" -#include "mark.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; + } -LONG symsize = 0; // Size of BSD symbol table -LONG strindx = 0x00000004; // BSD string table index -char * strtable; // Pointer to the symbol string table -char * objImage; // Global object image pointer + SETBE32(buf, 0, z); // Deposit symbol value + buf += 4; + symsize += 14; + buf += extra; + + return buf; +} // // Add an entry to the BSD symbol table // -char * constr_bsdsymtab(char * buf, SYM * sym, int globflag) +// 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 deposit longs - D_long(strindx); // Deposit the symbol string index + 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 + } - WORD w1 = sym->sattr; // Obtain symbol attribute - int w2 = sym->sattre; - LONG z = 0; // Initialise resulting symbol flags + uint16_t w1 = sym->sattr; // Obtain symbol attributes + uint32_t z = 0; // Initialize resulting symbol flags - if (w1 & EQUATED) - { - z = 0x02000000; // Set equated flag + 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 + if (globflag) + z |= 0x01000000; // Set global flag if requested + } D_long(z); // Deposit symbol attribute - z = sym->svalue; // Obtain symbol value - w1 &= DATA | BSS; // Determine DATA or BSS flag - if (w1) + if (w1 & (DATA | BSS)) z += sect[TEXT].sloc; // If DATA or BSS add TEXT segment size - if (w1 & BSS) + if (w1 & BSS) z += sect[DATA].sloc; // If BSS add DATA segment size D_long(z); // Deposit symbol value - - strcpy(strtable + strindx, sym->sname); - - strindx += strlen(sym->sname) + 1; // Incr string index incl null terminate + 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 @@ -77,23 +351,37 @@ char * constr_bsdsymtab(char * buf, SYM * sym, int globflag) // int WriteObject(int fd) { - LONG t; // Scratch long LONG tds; // TEXT & DATA segment size int i; // Temporary int CHUNK * cp; // Chunk (for gather) - char * buf; // Scratch area - char * p; // Temporary ptr - LONG ssize; // Size of symbols + uint8_t * buf; // Scratch area + uint8_t * p; // Temporary ptr LONG trsize, drsize; // Size of relocations - long unused; // For supressing 'write' warnings + 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... - switch (obj_format) + if ((obj_format == BSD) || ((obj_format == ALCYON) && (prg_flag == 0))) { - case BSD: - ssize = ((LONG)sy_assign(NULL, NULL)); // Assign index numbers to the symbols + 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(0x600000); // Allocate 6mb object file image memory + buf = malloc(0x800000); // Allocate 8MB object file image memory if (buf == NULL) { @@ -101,33 +389,36 @@ int WriteObject(int fd) return ERROR; } - memset(buf, 0, 0x600000); // Reset allocated memory + memset(buf, 0, 0x800000); // Clear allocated memory objImage = buf; // Set global object image pointer - strtable = malloc(0x200000); // Allocate 2mb scratch buffer + 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); // Reset allocated memory + memset(strtable, 0, 0x200000); // Clear allocated memory // Build object file header - chptr = buf; // Base of 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(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); // BSD 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(i=TEXT; i<=DATA; i++) { for(cp=sect[i].sfcode; cp!=NULL; cp=cp->chnext) { @@ -137,40 +428,623 @@ int WriteObject(int fd) } // Do relocation tables (and make changes to segment data) - p = buf + (BSDHDRSIZE + tds); // Move obj image ptr to reloc info - trsize = bsdmarkimg(p, tds, sect[TEXT].sloc, TEXT);// Do TEXT relocation table - chptr = buf + 24; // Point to relocation hdr entry + 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 - p = buf + (BSDHDRSIZE + tds + trsize); // Move obj image ptr to reloc info - drsize = bsdmarkimg(p, tds, sect[TEXT].sloc, DATA);// Do DATA relocation table - chptr = buf + 28; // Point to relocation hdr entry + + // 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 - p = buf + (BSDHDRSIZE + tds + trsize + drsize);// Point to start of symbol table - sy_assign(p, constr_bsdsymtab); // Build symbol and string tables - chptr = buf + 16; // Point to sym table size hdr entry + // 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); - + p = buf + BSDHDRSIZE + tds + trsize + drsize + symsize; memcpy(p, strtable, strindx); // Copy string table to object image - - if (buf) - free(strtable); // Free allocated memory - 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"); - break; + 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); + } +}