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Avoid null pointer dereference.

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This commit is contained in:
Radoslaw Kujawa 2021-01-25 01:00:18 +01:00
parent 8e89ed067a
commit 23730825fb
1 changed files with 8 additions and 1 deletions
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9
src/bus.c
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@ -118,7 +118,7 @@ bus_read_1(bus_t *t, uint16_t addr)
bus_access_device(t, addr, &d, &off);
if (d == NULL)
return 0xFF;
return 0xFF; /* simulate floting pins */
else
val = d->read_1(d, off);
@ -139,6 +139,13 @@ bus_write_1(bus_t *t, uint16_t addr, uint8_t val)
bus_access_device(t, addr, &d, &off);
if (d == NULL) {
if (t->access_debug)
rk65c02_log(LOG_DEBUG, "unmapped bus WRITE @ %x (off %x) value %x\n",
addr, off, val);
return;
}
if (t->access_debug)
rk65c02_log(LOG_DEBUG, "bus WRITE @ %x (off %x) value %x\n",
addr, off, val);