1 files changed, 56 insertions, 0 deletions
diff --git a/include/arch/x86_64/msr.h b/include/arch/x86_64/msr.h
new file mode 100644
index 0000000..c20f8fc
--- /dev/null
+++ b/include/arch/x86_64/msr.h
@@ -0,0 +1,56 @@
+#ifndef _JOVE_x86_64_MSR_H
+#define _JOVE_x86_64_MSR_H 1
+
+#include <stddef.h>
+#include <stdint.h>
+
+#define MSR_EFER 0xC0000080
+#define MSR_STAR 0xC0000081
+#define MSR_LSTAR 0xC0000082
+#define MSR_SFMASK 0xC0000084
+
+#define MSR_FSBASE 0xC0000100
+#define MSR_GSBASE 0xC0000101
+#define MSR_KERNELGSBASE 0xC0000102
+
+typedef union msr_efer
+{
+    struct {
+        uint8_t sce : 1;
+        uint8_t resv : 7;
+        uint8_t lme : 1;
+        uint8_t unk0 : 1;
+        uint8_t lma : 1;
+        uint8_t nxe : 1;
+        uint8_t svme : 1;
+        uint8_t lmsle : 1;
+        uint8_t ffxsr : 1;
+        uint8_t tce : 1;
+    };
+    uint32_t v[2];
+} msr_efer_t;
+
+typedef union msr_star
+{
+    struct {
+        uint32_t eip;
+        uint16_t kcs;
+        uint16_t ucs;
+    };
+    uint32_t v[2];
+} msr_star_t;
+typedef uintptr_t msr_lstar_t;
+
+void msr_efer_write(msr_efer_t v);
+msr_efer_t msr_efer_read(void);
+
+void msr_star_write(msr_star_t v);
+msr_star_t msr_star_read(void);
+
+void msr_lstar_write(msr_lstar_t v);
+msr_lstar_t msr_lstar_read(void);
+
+void msr_gsbase_write(uintptr_t gsbase);
+uintptr_t msr_gsbase_read(void);
+
+#endif