TSS setup

2026-04-01 13:04:33 +02:00
parent 8be2a744b4
commit d644126901
2 changed files with 35 additions and 3 deletions
@@ -13,19 +13,32 @@
 // we'll only use this as a requirement for paging, not more.
 // This means base 0 and no limit (whole address space)

-#define NUM_GDT_ENTRIES 5
+#define NUM_GDT_ENTRIES 7

 #define NULL_SELECTOR 0x00
 #define KERNEL_CODE_SEGMENT 0x08
 #define KERNEL_DATA_SEGMENT 0x10
 #define USER_CODE_SEGMENT 0x18
 #define USER_DATA_SEGMENT 0x20
+#define TSS_SEGMENT 0x28

 struct GDTR {
    uint16_t limit;
    uint64_t address;
 } __attribute__((packed));

+struct tss {
+    uint32_t reserved0;
+    uint64_t rsp0;
+    uint64_t rsp1;
+    uint64_t rsp2;
+    uint64_t reserved1;
+    uint64_t ist[7];
+    uint64_t reserved2;
+    uint16_t reserved3;
+    uint16_t iopb;
+} __attribute__((packed));
+
 void gdt_init(void);

 #endif