kernel: Simplify state management logic

kernel/Makefile

@@ -96,9 +96,8 @@ ifeq ($(CONFIG_KSU_MANUAL_HOOK), y)
 ccflags-y += -DKSU_MANUAL_HOOK
 $(info -- SukiSU: KSU_MANUAL_HOOK)
 else
-ccflags-y += -DKSU_HAVE_SYSCALL_TRACEPOINTS_HOOK
-ccflags-y += -DKSU_LKM_MODE
 ccflags-y += -DKSU_KPROBES_HOOK
+ccflags-y += -DKSU_TP_HOOK
 $(info -- SukiSU: KSU_TRACEPOINT_HOOK)
 endif
 

kernel/sucompat.c

@@ -77,7 +77,7 @@ int ksu_handle_faccessat(int *dfd, const char __user **filename_user, int *mode,
 {
     const char su[] = SU_PATH;
 
-#ifndef KSU_HAVE_SYSCALL_TRACEPOINTS_HOOK
+#ifdef KSU_MANUAL_HOOK
     if (!ksu_su_compat_enabled) {
         return 0;
     }
@@ -107,7 +107,7 @@ int ksu_handle_stat(int *dfd, const char __user **filename_user, int *flags)
     // const char sh[] = SH_PATH;
     const char su[] = SU_PATH;
 
-#ifndef KSU_HAVE_SYSCALL_TRACEPOINTS_HOOK
+#ifdef KSU_MANUAL_HOOK
     if (!ksu_su_compat_enabled) {
         return 0;
     }
@@ -159,7 +159,7 @@ int ksu_handle_execveat_sucompat(int *fd, struct filename **filename_ptr,
     const char sh[] = KSUD_PATH;
     const char su[] = SU_PATH;
 
-#ifndef KSU_HAVE_SYSCALL_TRACEPOINTS_HOOK
+#ifdef KSU_MANUAL_HOOK
     if (!ksu_su_compat_enabled) {
         return 0;
     }
@@ -211,7 +211,7 @@ int ksu_handle_execve_sucompat(int *fd, const char __user **filename_user,
     const char su[] = SU_PATH;
     char path[sizeof(su) + 1];
 
-#ifndef KSU_HAVE_SYSCALL_TRACEPOINTS_HOOK
+#ifdef KSU_MANUAL_HOOK
     if (!ksu_su_compat_enabled){
         return 0;
     }
@@ -250,7 +250,7 @@ int ksu_handle_execve_sucompat(int *fd, const char __user **filename_user,
 int __ksu_handle_devpts(struct inode *inode)
 {
 
-#ifndef KSU_HAVE_SYSCALL_TRACEPOINTS_HOOK
+#ifdef KSU_MANUAL_HOOK
     if (!ksu_su_compat_enabled)
         return 0;
 #endif

kernel/supercalls.c

@@ -9,6 +9,7 @@
 #include <linux/slab.h>
 #include <linux/uaccess.h>
 #include <linux/version.h>
+#include <linux/kprobes.h>
 
 #include "arch.h"
 #include "allowlist.h"
@@ -503,13 +504,12 @@ static int do_get_full_version(void __user *arg)
 static int do_get_hook_type(void __user *arg)
 {
     struct ksu_hook_type_cmd cmd = {0};
-    const char *type = "Unknown";
+    const char *type = "Tracepoint";
 
-#if defined(KSU_HAVE_SYSCALL_TRACEPOINTS_HOOK)
-    type = "Tracepoint";
-#elif defined(KSU_MANUAL_HOOK)
+#if defined(KSU_MANUAL_HOOK)
     type = "Manual";
 #endif
+
 #if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 13, 0)
     strscpy(cmd.hook_type, type, sizeof(cmd.hook_type));
 #else
@@ -743,6 +743,7 @@ int ksu_handle_sys_reboot(int magic1, int magic2, unsigned int cmd, void __user
     return 0;
 }
 
+#ifdef KSU_KPROBES_HOOK
 // Reboot hook for installing fd
 static int reboot_handler_pre(struct kprobe *p, struct pt_regs *regs)
 {
@@ -759,6 +760,7 @@ static struct kprobe reboot_kp = {
     .symbol_name = REBOOT_SYMBOL,
     .pre_handler = reboot_handler_pre,
 };
+#endif
 
 void ksu_supercalls_init(void)
 {
@@ -768,17 +770,20 @@ void ksu_supercalls_init(void)
     for (i = 0; ksu_ioctl_handlers[i].handler; i++) {
         pr_info("  %-18s = 0x%08x\n", ksu_ioctl_handlers[i].name, ksu_ioctl_handlers[i].cmd);
     }
-
+#ifdef KSU_KPROBES_HOOK
     int rc = register_kprobe(&reboot_kp);
     if (rc) {
         pr_err("reboot kprobe failed: %d\n", rc);
     } else {
         pr_info("reboot kprobe registered successfully\n");
     }
+#endif
 }
 
 void ksu_supercalls_exit(void){
+#ifdef KSU_KPROBES_HOOK
     unregister_kprobe(&reboot_kp);
+#endif
 }
 
 static inline void ksu_ioctl_audit(unsigned int cmd, const char *cmd_name, uid_t uid, int ret)

kernel/syscall_hook_manager.c

@@ -320,7 +320,7 @@ static inline void ksu_handle_task_alloc(struct pt_regs *regs)
 static void ksu_sys_enter_handler(void *data, struct pt_regs *regs, long id)
 {
 	if (unlikely(check_syscall_fastpath(id))) {
-#ifdef KSU_LKM_MODE
+#ifdef KSU_TP_HOOK
 		if (ksu_su_compat_enabled) {
 			// Handle newfstatat
 			if (id == __NR_newfstatat) {