//
// RMAC - Reboot's Macro Assembler for all Atari computers
// OBJECT.C - Writing Object Files
-// Copyright (C) 199x Landon Dyer, 2011-2017 Reboot and Friends
+// Copyright (C) 199x Landon Dyer, 2011-2020 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
- 6-15 Currently unused
*/
+// Internal function prototypes
+static void WriteLOD(void);
+static void WriteP56(void);
+
//
// Add entry to symbol table (in ALCYON mode)
w |= AL_EXTERN | AL_GLOBAL; // Common symbol
w &= ~AL_BSS; // They're not BSS in Alcyon object files
}
- else if (w1 & DEFINED)
+
+ if (w1 & DEFINED)
{
if (globflag) // Export the symbol
w |= AL_GLOBAL;
{
z = 0x02000000; // Set equated flag
}
- else
+
+ // If a symbol is both EQUd and flagged as TBD then we let
+ // the later take precedence. Otherwise the linker will not even
+ // bother trying to relocate the address during link time
+
+ switch (w1 & TDB)
{
- 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
- }
+ 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)
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 (w1 & DEFINED)
{
if (globflag) // Export the symbol
st_info |= 16; //STB_GLOBAL (1<<4)
//
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
+ uint32_t unused; // For supressing 'write' warnings
if (verb_flag)
{
// 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 (strtable == NULL)
{
+ free(buf);
error("cannot allocate string table memory (in BSD mode)");
return ERROR;
}
// 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
}
else if (obj_format == ALCYON)
{
+ ch_size = 0;
+
if (verb_flag)
{
if (prg_flag)
// 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 = sy_assign(NULL, NULL) * 28;
// Alloc memory for header + text + data, symbol and relocation
// 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
sy_assign(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)
// 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;
+ ch_size = 0;
+ challoc = 0x600000;
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)
// Just write the object file
m6502obj(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)");
+
+// objImage = buf; // Set global object image pointer
+
+ 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)
+ {
+ return error("cannot output absolute binary without a starting address (.org or command line)");
+ }
+
+ // 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]; l<dsp_currentorg; l++)
+ {
+ if (l->end != 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; i<count; i+=3)
+ {
+ if ((j & 7) != 7)
+ {
+ D_printf("%.6X ", (((p_chunk[0] << 8) | p_chunk[1]) << 8) | p_chunk[2]);
+ }
+ else
+ {
+ D_printf("%.6X\n", (((p_chunk[0] << 8) | p_chunk[1]) << 8) | p_chunk[2]);
+ }
+
+ p_chunk += 3;
+ j++;
+ }
+
+ cp = cp->chnext; // 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]; l<dsp_currentorg; l++)
+ {
+ if (l->end == 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);
+ }
+}
+
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