Properly protect the HLE instructions against corrupted memory. (#189)

[pcsx_rearmed.git] / libpcsxcore / psxinterpreter.c

diff --git a/libpcsxcore/psxinterpreter.c b/libpcsxcore/psxinterpreter.c
index 66730d9..fa454e1 100644 (file)
--- a/libpcsxcore/psxinterpreter.c
+++ b/libpcsxcore/psxinterpreter.c
@@ -727,9 +727,9 @@ void psxLWR() {
        */
 }
 
-void psxSB() { psxMemWrite8 (_oB_, _u8 (_rRt_)); }
-void psxSH() { psxMemWrite16(_oB_, _u16(_rRt_)); }
-void psxSW() { psxMemWrite32(_oB_, _u32(_rRt_)); }
+void psxSB() { psxMemWrite8 (_oB_, _rRt_ &   0xff); }
+void psxSH() { psxMemWrite16(_oB_, _rRt_ & 0xffff); }
+void psxSW() { psxMemWrite32(_oB_, _rRt_); }
 
 u32 SWL_MASK[4] = { 0xffffff00, 0xffff0000, 0xff000000, 0 };
 u32 SWL_SHIFT[4] = { 24, 16, 8, 0 };
@@ -780,10 +780,9 @@ void psxMFC0() { if (!_Rt_) return; _i32(_rRt_) = (int)_rFs_; }
 void psxCFC0() { if (!_Rt_) return; _i32(_rRt_) = (int)_rFs_; }
 
 void psxTestSWInts() {
-       // the next code is untested, if u know please
-       // tell me if it works ok or not (linuzappz)
        if (psxRegs.CP0.n.Cause & psxRegs.CP0.n.Status & 0x0300 &&
-               psxRegs.CP0.n.Status & 0x1) {
+          psxRegs.CP0.n.Status & 0x1) {
+               psxRegs.CP0.n.Cause &= ~0x7c;
                psxException(psxRegs.CP0.n.Cause, branch);
        }
 }
@@ -797,7 +796,8 @@ void MTC0(int reg, u32 val) {
                        break;
 
                case 13: // Cause
-                       psxRegs.CP0.n.Cause = val & ~(0xfc00);
+                       psxRegs.CP0.n.Cause &= ~0x0300;
+                       psxRegs.CP0.n.Cause |= val & 0x0300;
                        psxTestSWInts();
                        break;
 
@@ -842,7 +842,13 @@ void psxBASIC(struct psxCP2Regs *regs) {
 
 void psxHLE() {
 //     psxHLEt[psxRegs.code & 0xffff]();
-       psxHLEt[psxRegs.code & 0x07]();         // HDHOSHY experimental patch
+//     psxHLEt[psxRegs.code & 0x07]();         // HDHOSHY experimental patch
+    uint32_t hleCode = psxRegs.code & 0x03ffffff;
+    if (hleCode >= (sizeof(psxHLEt) / sizeof(psxHLEt[0]))) {
+        psxNULL();
+    } else {
+        psxHLEt[hleCode]();
+    }
 }
 
 void (*psxBSC[64])() = {