Acctually restore sysent[661]

src/kpatch/700.c

@@ -50,6 +50,15 @@ static inline void restore(struct kexec_args *uap) {
     *pktinfo_field = 0;
     u64 *pktinfo_field2 = uap->arg4;
     *pktinfo_field2 = 0;
+
+    // get kernel base
+    const u64 xfast_syscall_off = 0x1c0;
+    void * const kbase = (void *)rdmsr(0xc0000082) - xfast_syscall_off;
+
+    u64 *sysent_661_save = uap->arg5;
+    for (int i = 0; i < 0x30; i += 8) {
+        write64(kbase, 0x112d250 + i, sysent_661_save[i / 8]);
+    }
 }
 
 __attribute__((always_inline))

src/kpatch/750.c

@@ -50,6 +50,15 @@ static inline void restore(struct kexec_args *uap) {
     *pktinfo_field = 0;
     u64 *pktinfo_field2 = uap->arg4;
     *pktinfo_field2 = 0;
+
+    // get kernel base
+    const u64 xfast_syscall_off = 0x1c0;
+    void * const kbase = (void *)rdmsr(0xc0000082) - xfast_syscall_off;
+
+    u64 *sysent_661_save = uap->arg5;
+    for (int i = 0; i < 0x30; i += 8) {
+        write64(kbase, 0x1129f30 + i, sysent_661_save[i / 8]);
+    }
 }
 
 __attribute__((always_inline))

src/kpatch/800.c

@@ -50,6 +50,15 @@ static inline void restore(struct kexec_args *uap) {
     *pktinfo_field = 0;
     u64 *pktinfo_field2 = uap->arg4;
     *pktinfo_field2 = 0;
+
+    // get kernel base
+    const u64 xfast_syscall_off = 0x1c0;
+    void * const kbase = (void *)rdmsr(0xc0000082) - xfast_syscall_off;
+
+    u64 *sysent_661_save = uap->arg5;
+    for (int i = 0; i < 0x30; i += 8) {
+        write64(kbase, 0x11040c0 + i, sysent_661_save[i / 8]);
+    }
 }
 
 __attribute__((always_inline))

src/kpatch/850.c

@@ -50,6 +50,16 @@ static inline void restore(struct kexec_args *uap) {
     *pktinfo_field = 0;
     u64 *pktinfo_field2 = uap->arg4;
     *pktinfo_field2 = 0;
+
+    // get kernel base
+    const u64 xfast_syscall_off = 0x1c0;
+    void * const kbase = (void *)rdmsr(0xc0000082) - xfast_syscall_off;
+
+
+    u64 *sysent_661_save = uap->arg5;
+    for (int i = 0; i < 0x30; i += 8) {
+        write64(kbase, 0x11041b0 + i, sysent_661_save[i / 8]);
+    }
 }
 
 __attribute__((always_inline))

src/kpatch/900.c

@@ -50,6 +50,15 @@ static inline void restore(struct kexec_args *uap) {
     *pktinfo_field = 0;
     u64 *pktinfo_field2 = uap->arg4;
     *pktinfo_field2 = 0;
+
+    // get kernel base
+    const u64 xfast_syscall_off = 0x1c0;
+    void * const kbase = (void *)rdmsr(0xc0000082) - xfast_syscall_off;
+
+    u64 *sysent_661_save = uap->arg5;
+    for (int i = 0; i < 0x30; i += 8) {
+        write64(kbase, 0x1107f00 + i, sysent_661_save[i / 8]);
+    }
 }
 
 __attribute__((always_inline))

src/kpatch/903.c

@@ -50,6 +50,15 @@ static inline void restore(struct kexec_args *uap) {
     *pktinfo_field = 0;
     u64 *pktinfo_field2 = uap->arg4;
     *pktinfo_field2 = 0;
+
+    // get kernel base
+    const u64 xfast_syscall_off = 0x1c0;
+    void * const kbase = (void *)rdmsr(0xc0000082) - xfast_syscall_off;
+
+    u64 *sysent_661_save = uap->arg5;
+    for (int i = 0; i < 0x30; i += 8) {
+        write64(kbase, 0x1103f00 + i, sysent_661_save[i / 8]);
+    }
 }
 
 __attribute__((always_inline))

src/kpatch/950.c

@@ -50,6 +50,15 @@ static inline void restore(struct kexec_args *uap) {
     *pktinfo_field = 0;
     u64 *pktinfo_field2 = uap->arg4;
     *pktinfo_field2 = 0;
+
+    // get kernel base
+    const u64 xfast_syscall_off = 0x1c0;
+    void * const kbase = (void *)rdmsr(0xc0000082) - xfast_syscall_off;
+
+    u64 *sysent_661_save = uap->arg5;
+    for (int i = 0; i < 0x30; i += 8) {
+        write64(kbase, 0x1100ee0 + i, sysent_661_save[i / 8]);
+    }
 }
 
 __attribute__((always_inline))