Check IOPL on 286 task segments.

2024-02-22 00:56:28 +01:00
parent 58a0c840c1
commit fcabd353d9
1 changed files with 5 additions and 1 deletions
--- a/src/cpu/386_common.c
+++ b/src/cpu/386_common.c
@@ -1605,8 +1605,12 @@ checkio(uint32_t port, int mask)
 {
    uint32_t t;

-    if (!(tr.access & 0x08))
+    if (!(tr.access & 0x08)) {
+        if ((CPL) > (IOPL))
+            return 1;
+
        return 0;
+    }

    cpl_override = 1;
    t            = readmemw(tr.base, 0x66);