feat: scheduling, usermode, shell

2026-02-17 19:17:01 +01:00
parent 20fa8a9be2
commit 605fbcbe42
46 changed files with 2622 additions and 98 deletions
@@ -17,25 +17,45 @@ namespace Hal {
            uint8_t BaseMiddle;
            uint8_t AccessByte;
            uint8_t GranularityByte;
-            uint8_t BaseHigh;        
+            uint8_t BaseHigh;
        }__attribute__((packed));
-        
+
        struct BasicGDT {
-            GDTEntry Null;        
-            GDTEntry KernelCode;        
-            GDTEntry KernelData;        
-            GDTEntry UserCode;        
-            GDTEntry UserData;
-        
-            // Task State Segment
-            GDTEntry TSS;
+            GDTEntry Null;          // 0x00
+            GDTEntry KernelCode;    // 0x08
+            GDTEntry KernelData;    // 0x10
+            GDTEntry UserData;      // 0x18  (before UserCode for SYSRET)
+            GDTEntry UserCode;      // 0x20
+            GDTEntry TSS;           // 0x28  (low 8 bytes of 16-byte TSS descriptor)
+            GDTEntry TSSHigh;       // 0x30  (high 8 bytes of 16-byte TSS descriptor)
        }__attribute__((packed));
-        
+
        struct GDTPointer {
            uint16_t Size;
            uint64_t GDTAddress;
        }__attribute__((packed));
-        
+
+        struct TSS64 {
+            uint32_t reserved0;
+            uint64_t rsp0;
+            uint64_t rsp1;
+            uint64_t rsp2;
+            uint64_t reserved1;
+            uint64_t ist1;
+            uint64_t ist2;
+            uint64_t ist3;
+            uint64_t ist4;
+            uint64_t ist5;
+            uint64_t ist6;
+            uint64_t ist7;
+            uint64_t reserved2;
+            uint16_t reserved3;
+            uint16_t iopbOffset;
+        }__attribute__((packed));
+
+        extern TSS64 g_tss;
+
        void BridgeLoadGDT();
        void PrepareGDT();
-};
+        void LoadTSS();
+};