//
-// RMAC - Reboot's Macro Assembler for the Atari Jaguar Console System
+// RMAC - Reboot's 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, 2011-2019 Reboot and Friends
// RMAC derived from MADMAC v1.07 Written by Landon Dyer, 1986
-// Source Utilised with the Kind Permission of Landon Dyer
+// Source utilised with the kind permission of Landon Dyer
//
#include "object.h"
+#include "6502.h"
+#include "direct.h"
+#include "error.h"
+#include "mark.h"
+#include "riscasm.h"
#include "sect.h"
#include "symbol.h"
-#include "mark.h"
-#include "error.h"
-#include "risca.h"
-
-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
-
-//
-// --- Add an entry to the BSD symbol table --------------------------------------------------------
-//
-
-char *constr_bsdsymtab(char *buf, SYM *sym, int globflag) {
- LONG z; // Scratch long
- WORD w1; // Scratch word
- int w2; // Scratch long
-
- chptr = buf; // Point to buffer for deposit longs
- D_long(strindx); // Deposit the symbol string index
-
- w1 = sym->sattr; // Obtain symbol attribute
- w2 = sym->sattre;
- z = 0; // Initialise resulting symbol flags
- if(w1 & EQUATED) {
- z = 0x02000000; // Set equated flag
- } else {
- 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
- w1 &= DATA|BSS; // Determine DATA or BSS flag
- if(w1)
- 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
-
- 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);
+
+//#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
+*/
+
+
+//
+// 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
+ }
+ else 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
+//
+uint8_t * AddBSDSymEntry(uint8_t * buf, SYM * sym, int globflag)
+{
+ chptr = buf; // Point to buffer for depositing longs
+ D_long(strindx); // Deposit the symbol string index
+
+ uint16_t w1 = sym->sattr; // Obtain symbol attributes
+ uint32_t z = 0; // Initialize resulting symbol flags
+
+ if (w1 & EQUATED)
+ {
+ z = 0x02000000; // Set equated flag
+ }
+ else
+ {
+ 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
+ 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;
}
+
//
-// --- Generate object file ------------------------------------------------------------------------
-//
-
-int object(WORD 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
- LONG trsize, drsize; // Size of relocations
-
- // Write requested object file...
- switch(obj_format) {
- case BSD:
- ssize = ((LONG)sy_assign(NULL, NULL)); // Assign index numbers to the symbols
- tds = sect[TEXT].sloc + sect[DATA].sloc; // Get size of TEXT and DATA segment
- buf = malloc(0x400000); // Allocate 4mb object file image memory
- if(buf == NULL) {
- error("cannot allocate object file memory (in BSD mode)");
- return(ERROR);
- }
- memset(buf, 0, 0x400000); // Reset allocated memory
- objimage = buf; // Set global object image pointer
- strtable = malloc(0x200000); // Allocate 2mb scratch buffer
- if(strtable == NULL) {
- error("cannot allocate string table memory (in BSD mode)");
- return(ERROR);
- }
- memset(strtable, 0, 0x200000); // Reset allocated memory
-
- // Build object file header
- chptr = buf; // Base of header
- t = 0x00000107;
- D_long(t); // Magic number
- t = sect[TEXT].sloc; // TEXT size
- D_long(t);
- t = sect[DATA].sloc; // DATA size
- D_long(t);
- t = sect[BSS].sloc; // BSS size
- D_long(t);
- t = 0x00000000;
- D_long(t); // Symbol size
- D_long(t); // First entry (0L)
- D_long(t); // TEXT relocation size
- D_long(t); // BSD 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) {
- copy(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 = bsdmarkimg(p, tds, sect[TEXT].sloc, TEXT);// Do TEXT relocation table
- chptr = buf + 24; // 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
- 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
- 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
- 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
- write(fd, buf, BSDHDRSIZE + tds + trsize + drsize + symsize + strindx + 4);
-
- if(buf) free(buf); // Free allocated memory
- break;
- }
-
- return(0);
+// 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 & COMMON)
+ {
+ //w |= AL_EXTERN | AL_GLOBAL; // common symbol
+ //w &= ~AL_BSS; // they're not BSS in Alcyon object files
+ }
+ else 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 = 0xFFF1; // 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)
+ st_shndx = 0; // Global, not absolute
+
+ 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 t; // Scratch long
+ 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
+ long 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)))
+ {
+ // 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);
+ }
+ sy_assign(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)
+ {
+ 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)
+ 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;
+ sy_assign(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)
+ {
+ 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)
+ uint32_t symbolMaxSize = sy_assign(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
+ 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)
+ {
+ // sy_assign with AddSymEntry updates symsize (stays 0 otherwise)
+ sy_assign(buf + HDRSIZE + tds, AddSymEntry);
+ chptr = buf + 0x0E; // Point to symbol table size entry
+ D_long(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; j<i; j++)
+ printf("\"%s\"\n", shstrtab + shstTab[j]);
+#endif
+
+ // Construct ELF header
+ // If you want to make any sense out of this you'd better take a look
+ // at Executable and Linkable Format on Wikipedia.
+ chptr = buf;
+ D_long(0x7F454C46); // 00 - "<7F>ELF" 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 = sy_assign_ELF(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);
+ }
+
+ return 0;
+}
projects / rmac / blobdiff