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Potentially fix a double page fault issue under certain conditions

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Ry 2022-09-15 23:41:46 -07:00
parent 02f3d04f4f
commit d30dad4797
1 changed files with 17 additions and 13 deletions
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4
src/memory.rs
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@ -232,13 +232,16 @@ impl Memory {
pub fn write_8(&mut self, mut address: u32, byte: u8) { pub fn write_8(&mut self, mut address: u32, byte: u8) {
let mut writable = true; let mut writable = true;
let mut ok = true;
if *self.mmu_enabled() { if *self.mmu_enabled() {
(address, writable) = self.virtual_to_physical(address as u32).unwrap_or_else(|| { (address, writable) = self.virtual_to_physical(address as u32).unwrap_or_else(|| {
self.exception_sender().send(Exception::PageFaultWrite(address)).unwrap(); self.exception_sender().send(Exception::PageFaultWrite(address)).unwrap();
ok = false;
(0, false) (0, false)
}); });
} }
if ok {
if writable { if writable {
let address = address as usize; let address = address as usize;
@ -258,6 +261,7 @@ impl Memory {
self.exception_sender().send(Exception::PageFaultWrite(address)).unwrap(); self.exception_sender().send(Exception::PageFaultWrite(address)).unwrap();
} }
} }
}
pub fn write_16(&mut self, address: u32, half: u16) { pub fn write_16(&mut self, address: u32, half: u16) {
self.write_8(address, (half & 0x00FF) as u8); self.write_8(address, (half & 0x00FF) as u8);
self.write_8(address + 1, (half >> 8) as u8); self.write_8(address + 1, (half >> 8) as u8);