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/*
Copyright 2013 Michael Pavone
This file is part of BlastEm.
BlastEm is free software distributed under the terms of the GNU General Public License version 3 or greater. See COPYING for full license text.
*/
#include "z80inst.h"
#include <stdio.h>
#include <stdlib.h>
uint8_t visited[(64*1024)/8];
uint8_t label[(64*1024)/8];
void visit(uint16_t address)
{
visited[address/8] |= 1 << (address % 8);
}
void reference(uint16_t address)
{
//printf("referenced: %X\n", address);
label[address/8] |= 1 << (address % 8);
}
uint8_t is_visited(uint16_t address)
{
return visited[address/8] & (1 << (address % 8));
}
uint8_t is_label(uint16_t address)
{
return label[address/8] & (1 << (address % 8));
}
typedef struct deferred {
uint16_t address;
struct deferred *next;
} deferred;
deferred * defer(uint16_t address, deferred * next)
{
if (is_visited(address)) {
return next;
}
//printf("deferring %X\n", address);
deferred * d = malloc(sizeof(deferred));
d->address = address;
d->next = next;
return d;
}
uint8_t labels = 0;
uint8_t addr = 0;
uint8_t only = 0;
int main(int argc, char ** argv)
{
long filesize;
uint8_t *filebuf;
char disbuf[1024];
z80inst instbuf;
uint8_t * cur;
FILE * f = fopen(argv[1], "rb");
fseek(f, 0, SEEK_END);
filesize = ftell(f);
fseek(f, 0, SEEK_SET);
filebuf = malloc(filesize);
fread(filebuf, 1, filesize, f);
fclose(f);
deferred *def = NULL, *tmpd;
for(uint8_t opt = 2; opt < argc; ++opt) {
if (argv[opt][0] == '-') {
FILE * address_log;
switch (argv[opt][1])
{
case 'l':
labels = 1;
break;
case 'a':
addr = 1;
break;
case 'o':
only = 1;
break;
case 'f':
opt++;
if (opt >= argc) {
fputs("-f must be followed by a filename\n", stderr);
exit(1);
}
address_log = fopen(argv[opt], "r");
if (!address_log) {
fprintf(stderr, "Failed to open %s for reading\n", argv[opt]);
exit(1);
}
while (fgets(disbuf, sizeof(disbuf), address_log)) {
if (disbuf[0]) {
uint16_t address = strtol(disbuf, NULL, 16);
if (address) {
def = defer(address, def);
reference(address);
}
}
}
}
} else {
uint16_t address = strtol(argv[opt], NULL, 16);
def = defer(address, def);
reference(address);
}
}
uint16_t start = 0;
uint8_t *encoded, *next;
uint32_t size;
if (!def || !only) {
def = defer(start, def);
}
uint16_t address;
while(def) {
do {
encoded = NULL;
address = def->address;
if (!is_visited(address)) {
encoded = filebuf + address;
}
tmpd = def;
def = def->next;
free(tmpd);
} while(def && encoded == NULL);
if (!encoded) {
break;
}
for(;;) {
if (address > filesize || is_visited(address)) {
break;
}
visit(address);
next = z80_decode(encoded, &instbuf);
address += (next-encoded);
encoded = next;
//z80_disasm(&instbuf, disbuf);
//printf("%X: %s\n", address, disbuf);
switch (instbuf.op)
{
case Z80_JR:
address += instbuf.immed;
encoded = filebuf + address;
break;
case Z80_JRCC:
reference(address + instbuf.immed);
def = defer(address + instbuf.immed, def);
break;
case Z80_JP:
address = instbuf.immed;
encoded = filebuf + address;
break;
case Z80_JPCC:
case Z80_CALL:
case Z80_CALLCC:
case Z80_RST:
reference(instbuf.immed);
def = defer(instbuf.immed, def);
break;
default:
if (z80_is_terminal(&instbuf)) {
address = filesize + 1;
}
}
}
}
if (labels) {
for (address = filesize; address < (64*1024); address++) {
if (is_label(address)) {
printf("ADR_%X equ $%X\n", address, address);
}
}
puts("");
}
for (address = 0; address < filesize; address++) {
if (is_visited(address)) {
encoded = filebuf + address;
z80_decode(encoded, &instbuf);
if (labels) {
/*m68k_disasm_labels(&instbuf, disbuf);
if (is_label(instbuf.address)) {
printf("ADR_%X:\n", instbuf.address);
}
if (addr) {
printf("\t%s\t;%X\n", disbuf, instbuf.address);
} else {
printf("\t%s\n", disbuf);
}*/
} else {
z80_disasm(&instbuf, disbuf, address);
printf("%X: %s\n", address, disbuf);
}
}
}
return 0;
}
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