static int
intern_op (unw_addr_space_t as, unw_accessors_t *a, unw_word_t *addr,
unw_dyn_op_t *op, void *arg)
{
int ret;
if ((ret = fetch8 (as, a, addr, &op->tag, arg)) < 0
|| (ret = fetch8 (as, a, addr, &op->qp, arg)) < 0
|| (ret = fetch16 (as, a, addr, &op->reg, arg)) < 0
|| (ret = fetch32 (as, a, addr, &op->when, arg)) < 0
|| (ret = fetchw (as, a, addr, &op->val, arg)) < 0)
return ret;
return 0;
}
static inline int
intern_string (unw_addr_space_t as, unw_accessors_t *a,
unw_word_t addr, char *buf, size_t buf_len, void *arg)
{
size_t i;
int ret;
for (i = 0; i < buf_len; ++i)
{
if ((ret = fetch8 (as, a, &addr, (int8_t *) buf + i, arg)) < 0)
return ret;
if (buf[i] == '\0')
return 0; /* copied full string; return success */
}
buf[buf_len - 1] = '\0'; /* ensure string is NUL terminated */
return -UNW_ENOMEM;
}
int emulate8080 (int cycles)
{
int cyclesDone = 0;
while (cyclesDone < cycles)
{
if (e8080.halt) {
printf("Halted!\n");
break;
}
u8 opcode = fetch8();
#ifdef DEBUG
printf("[%04x] %s\n", e8080.PC, lut_mnemonic[opcode]);
#endif
opTbl[opcode].execute (opcode);
cyclesDone += opTbl[opcode].cycles;
}
return cyclesDone;
}
