//
-// 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, 2011-2017 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 "error.h"
-#include "riscasm.h"
#include "mark.h"
+#include "riscasm.h"
+#include "sect.h"
+#include "symbol.h"
-/*
- * Imports
- */
-extern int obj_format; // object file format to write
-extern int prg_flag; // generate Atari ST direct executable
+//#define DEBUG_ELF
-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
+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;
+
+ for(i=0; i<8 && *s; i++)
+ *buf++ = *s++;
+
+ while (i++ < 8)
+ *buf++ = '\0';
+
+ //
+ // 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
+ //
+ register uint16_t w1 = sym->sattr;
+ register uint16_t w = AL_DEFINED | tdb_tab[w1 & TDB];
+
+ 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 = 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;
+
+ return buf;
+}
//
// Add an entry to the BSD symbol table
//
-char * constr_bsdsymtab(char * buf, SYM * sym, int globflag)
+uint8_t * AddBSDSymEntry(uint8_t * buf, SYM * sym, int globflag)
{
- chptr = buf; // Point to buffer for deposit longs
+ chptr = buf; // Point to buffer for depositing longs
D_long(strindx); // Deposit the symbol 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
}
else
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
buf += 12; // Increment buffer to next record
symsize += 12; // Increment symbol table size
}
-/*
- * Alcyon symbol flags
- */
-#define AL_DEFINED 0x8000
-#define AL_EQUATED 0x4000
-#define AL_GLOBAL 0x2000
-#define AL_EQUREG 0x1000
-#define AL_EXTERN 0x0800
-#define AL_DATA 0x0400
-#define AL_TEXT 0x0200
-#define AL_BSS 0x0100
-#define AL_FILE 0x0080
-
-LONG 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. */
-
-static WORD tdb_tab[] = {
- 0, /* absolute */
- AL_TEXT, /* TEXT segment based */
- AL_DATA, 0, /* DATA segment based */
- AL_BSS /* BSS segment based */
-};
-
-
-#define HDRSIZE 0x1C /* size of Alcyon header */
-
-
-/*
- * Add entry to symbol table;
- * if `globflag' is 1, make the symbol global;
- * if in .PRG mode, adjust symbol values for fake link.
- *
- */
-char * constr_symtab(register char * buf, SYM * sym, int globflag)
+//
+// Add entry to ELF symbol table; if `globflag' is 1, make the symbol global
+//
+uint8_t * AddELFSymEntry(uint8_t * buf, SYM * sym, int globflag)
{
- register int i;
- register char * s;
- register WORD w;
- register LONG z;
- register WORD w1;
-
- /*
- * Copy symbol name
- */
- s = sym->sname;
-
- for(i=0; i<8 && *s; i++)
- *buf++ = *s++;
-
- while (i++ < 8)
- *buf++ = '\0';
+ chptr = buf;
+ D_long(strindx); // st_name
+ D_long(sym->svalue); // st_value
+ D_long(0); // st_size
+ uint8_t st_info = 0;
- /*
- * 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
- *
- */
- w1 = sym->sattr;
- w = AL_DEFINED | tdb_tab[w1 & TDB];
-
- if (w1 & EQUATED) /* equated */
- w |= AL_EQUATED;
+ 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 */
+ //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;
+ if (globflag) // Export the symbol
+ st_info |= 16; //STB_GLOBAL (1<<4)
}
- else w |= AL_EXTERN; /* imported symbol */
+ else if (w1 & (GLOBAL | REFERENCED))
+ st_info |= 16;
- *buf++ = w >> 8;
- *buf++ = (char)w;
+ D_byte(st_info);
+ D_byte(0); // st_other
- z = sym->svalue;
+ uint16_t st_shndx = 0xFFF1; // Assume absolute (equated) number
- if (prg_flag) /* relocate value in .PRG segment */
- {
- w1 &= DATA | BSS;
+ 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
- if (w1)
- z += sect[TEXT].sloc;
+ D_word(st_shndx);
- if (w1 & BSS)
- z += sect[DATA].sloc;
- }
+ 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;
+}
- *buf++ = z >> 24; /* deposit symbol value */
- *buf++ = z >> 16;
- *buf++ = z >> 8;
- *buf++ = z;
- return buf;
+//
+// 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;
+ 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;
+ D_long(name);
+ D_long(addr);
+ D_long(size);
+ *chptr++ = info;
+ *chptr++ = other;
+ D_word(shndx);
+ return 16;
}
LONG tds; // TEXT & DATA segment size
int i; // Temporary int
CHUNK * cp; // Chunk (for gather)
- char * buf; // Scratch area
- char * p; // Temporary ptr
+ uint8_t * buf; // Scratch area
+ uint8_t * p; // Temporary ptr
LONG ssize; // Size of symbols
LONG trsize, drsize; // Size of relocations
long unused; // For supressing 'write' warnings
}
// Write requested object file...
- switch (obj_format)
- {
- case BSD:
+ 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);
}
- ssize = ((LONG)sy_assign(NULL, NULL)); // Assign index numbers to the symbols
+
+ ssize = 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(0x600000); // Allocate 6mb object file image memory
return ERROR;
}
- memset(buf, 0, 0x600000); // Reset allocated memory
+ memset(buf, 0, 0x600000); // 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)
{
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)
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)
{
}
// 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;
+ 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);
-
+ 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
-
- break;
-
- case ALCYON:
+ }
+ }
+ else if (obj_format == ALCYON)
+ {
if (verb_flag)
{
if (prg_flag)
printf("Total : %d bytes\n", sect[TEXT].sloc + sect[DATA].sloc + sect[BSS].sloc);
}
}
- /*
- * Compute size of symbol table;
- * assign numbers to the symbols...
- */
+
+ // Compute size of symbol table; assign numbers to the symbols...
ssize = 0;
+ // As we grabbed BSD *and* Alcyon in prg_flag == 0 mode, this is *always*
+ // false... :-P
if (prg_flag != 1)
- ssize = ((LONG)sy_assign(NULL, NULL)) * 14;
+ ssize = sy_assign(NULL, NULL) * 14;
- /*
- * Alloc memory for header+text+data, symbol and
- * relocation information construction.
- */
+ // Alloc memory for header + text + data, symbol and relocation
+ // information construction.
t = tds = sect[TEXT].sloc + sect[DATA].sloc;
if (t < ssize)
t = ssize;
- buf = (char *)((int)malloc(t + HDRSIZE) + HDRSIZE);
-
- /*
- * Build object file header
- * just before the text+data image
- */
- chptr = buf - HDRSIZE; /* -> base of header */
- D_word(0x601a); /* 00 - magic number */
- t = sect[TEXT].sloc; /* 02 - TEXT size */
- D_long(t);
- t = sect[DATA].sloc; /* 06 - DATA size */
- D_long(t);
- t = sect[BSS].sloc; /* 0a - BSS size */
- D_long(t);
- D_long(ssize); /* 0e - symbol table size */
- 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
- */
+ // Is there any reason to do this this way???
+ buf = malloc(t + HDRSIZE);
+ buf += HDRSIZE;
+
+ // Build object file header just before the text+data image
+ chptr = buf - HDRSIZE; // -> 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(ssize); // 0E - symbol table size
+ 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;
for(i=TEXT; i<=DATA; i++)
{
- for (cp=sect[i].sfcode; cp!=NULL; cp=cp->chnext)
+ 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)
- markimg(buf, tds, sect[TEXT].sloc, 0);
+ MarkImage(buf, tds, sect[TEXT].sloc, 0);
- write(fd, buf - HDRSIZE, tds + HDRSIZE);
+ unused = write(fd, buf - HDRSIZE, tds + HDRSIZE);
- /*
- * Construct and write symbol table
- */
+ // Construct and write symbol table
if (prg_flag != 1)
{
- sy_assign(buf, constr_symtab);
- write(fd, buf, ssize);
+ sy_assign(buf, AddSymEntry);
+ unused = write(fd, buf, ssize);
}
- /*
- * Construct and write relocation information;
- * the size of it changes if we're writing a RELMODed executable.
- */
- tds = markimg(buf, tds, sect[TEXT].sloc, 1);
- write(fd, buf, tds);
- break;
+ // Construct and write relocation information; the size of it changes if
+ // we're writing a RELMODed executable.
+ 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 BSD 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 BSD 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, 2, 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, 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, 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