添加 KPM 模块支持，包括 KPM 配置选项、核心功能实现及相关头文件

kernel/kpm/Makefile

@@ -0,0 +1,2 @@
+obj-y += kpm.o
+obj-y += compact.o

kernel/kpm/compact.c

@@ -0,0 +1,100 @@
+#include <linux/export.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/fs.h>
+#include <linux/kernfs.h>
+#include <linux/file.h>
+#include <linux/slab.h>
+#include <linux/vmalloc.h>
+#include <linux/uaccess.h>
+#include <linux/elf.h>
+#include <linux/kallsyms.h>
+#include <linux/version.h>
+#include <linux/list.h>
+#include <linux/spinlock.h>
+#include <linux/rcupdate.h>
+#include <asm/elf.h>    /* 包含 ARM64 重定位类型定义 */
+#include <linux/vmalloc.h>
+#include <linux/mm.h>
+#include <linux/string.h>
+#include <asm/cacheflush.h>
+#include <linux/module.h>
+#include <linux/vmalloc.h>
+#include <linux/set_memory.h>
+#include <linux/version.h>
+#include <linux/export.h>
+#include <linux/slab.h>
+#include "kpm.h"
+#include "compact.h"
+
+unsigned long sukisu_compact_find_symbol(const char* name);
+
+// ======================================================================
+
+const char* kpver = "0.10";
+
+struct CompactAddressSymbol {
+    const char* symbol_name;
+    void* addr;
+};
+
+struct CompactAliasSymbol {
+    const char* symbol_name;
+    const char* compact_symbol_name;
+};
+
+struct CompactAddressSymbol address_symbol [] = {
+    { "kallsyms_lookup_name", &kallsyms_lookup_name },
+    { "compact_find_symbol", &sukisu_compact_find_symbol },
+    { "compat_copy_to_user", &copy_to_user },
+    { "compat_strncpy_from_user", &strncpy_from_user },
+    { "kpver", &kpver },
+    { "is_run_in_sukisu_ultra", (void*)1 }
+};
+
+struct CompactAliasSymbol alias_symbol[] = {
+    {"kf_strncat", "strncat"},
+    {"kf_strlen", "strlen" },
+    {"kf_strcpy", "strcpy"},
+    {"compat_copy_to_user", "__arch_copy_to_user"}
+};
+
+unsigned long sukisu_compact_find_symbol(const char* name) {
+    int i;
+    unsigned long addr;
+
+    // 先自己在地址表部分查出来
+    for(i = 0; i < (sizeof(address_symbol) / sizeof(struct CompactAddressSymbol)); i++) {
+        struct CompactAddressSymbol* symbol = &address_symbol[i];
+        if(strcmp(name, symbol->symbol_name) == 0) {
+            return (unsigned long) symbol->addr;
+        }
+    }
+
+    /* 如果符号名以 "kf__" 开头，尝试解析去掉前缀的部分 */
+    if (strncmp(name, "kf__", 4) == 0) {
+        const char *real_name = name + 4;  // 去掉 "kf__"
+        addr = (unsigned long)kallsyms_lookup_name(real_name);
+        if (addr) {
+            return addr;
+        }
+    }
+
+    // 通过内核来查
+    addr = kallsyms_lookup_name(name);
+    if(addr) {
+        return addr;
+    }
+
+    // 查不到就查查兼容的符号
+    for(i = 0; i < (sizeof(alias_symbol) / sizeof(struct CompactAliasSymbol)); i++) {
+        struct CompactAliasSymbol* symbol = &alias_symbol[i];
+        if(strcmp(name, symbol->symbol_name) == 0) {
+            addr = kallsyms_lookup_name(symbol->compact_symbol_name);
+            if(addr)
+                return addr;
+        }
+    }
+
+    return 0;
+}

kernel/kpm/compact.h

@@ -0,0 +1,6 @@
+#ifndef ___SUKISU_KPM_COMPACT_H
+#define ___SUKISU_KPM_COMPACT_H
+
+unsigned long sukisu_compact_find_symbol(const char* name);
+
+#endif

kernel/kpm/kpm.h

@@ -0,0 +1,44 @@
+#ifndef ___SUKISU_KPM_H
+#define ___SUKISU_KPM_H
+
+int sukisu_handle_kpm(unsigned long arg3, unsigned long arg4, unsigned long arg5);
+int sukisu_is_kpm_control_code(unsigned long arg2);
+
+// KPM控制代码
+#define CMD_KPM_CONTROL 28
+#define CMD_KPM_CONTROL_MAX 34
+
+// 控制代码
+
+// prctl(xxx, xxx, 1, "PATH", "ARGS")
+// success return 0, error return -N
+#define SUKISU_KPM_LOAD 28
+
+// prctl(xxx, xxx, 2, "NAME")
+// success return 0, error return -N
+#define SUKISU_KPM_UNLOAD 29
+
+// num = prctl(xxx, xxx, 3)
+// error return -N
+// success return +num or 0
+#define SUKISU_KPM_NUM 30
+
+// prctl(xxx, xxx, 4, Buffer, BufferSize)
+// success return +out, error return -N
+#define SUKISU_KPM_LIST 31
+
+// prctl(xxx, xxx, 5, "NAME", Buffer[256])
+// success return +out, error return -N
+#define SUKISU_KPM_INFO 32
+
+// prctl(xxx, xxx, 6, "NAME", "ARGS")
+// success return KPM's result value
+// error return -N
+#define SUKISU_KPM_CONTROL 33
+
+// prctl(xxx, xxx, 7)
+// success will printf to stdout and return 0
+// error will return -1
+#define SUKISU_KPM_PRINT 34
+
+#endif