[Mod] Backup at 23.10.14

01-Debug/01-Panic/Makefile

@@ -0,0 +1,85 @@
+#*******************************************************************************
+# HangZhou Hikvision Digital Technology Co., Ltd. All Right Reserved.
+# Author       :
+# Version      : V1.0.0  2020.10.21
+# Description  :
+# Note         : yegaoyang@hikvision.com.cn     Modified        2020.10.21
+#*******************************************************************************
+
+#*******************************************************************************
+# Path information
+#*******************************************************************************
+LOCAL_DIR    := $(realpath $(dir $(lastword $(MAKEFILE_LIST))))
+KERNEL_DIR   ?= /home/gaoyang3513/Source/06-SG20x/02-Projects/SDK_SG200x_V2/linux_5.10/build/sg2000_milkv_duos_glibc_arm64_sd
+#KERNEL_DIR   ?= $(HOME)/Source/06-SG20x/02-Projects/SDK_SG200x_V2/linux_5.10/build/sg2000_milkv_duos_glibc_arm64_sd/
+
+# ParDirectory
+LIBS_DIR     :=
+INCLUDE_DIR  :=
+
+# Subdirectory
+
+# Output
+OUTPUT_DIR   := $(LOCAL_DIR)/output
+INSTALL_DIR  ?= $(LOCAL_DIR)/__install
+
+#*******************************************************************************
+# Variables
+#*******************************************************************************
+MULTI_CORES ?= $(shell grep -c ^processor /proc/cpuinfo)
+
+MOD_NAME := test_panic
+
+#*******************************************************************************
+# Compile configure
+#*******************************************************************************
+ARCH          ?= arm64
+CROSS_COMPILE ?= ${HOME}/Source/06-SG20x/02-Projects/SDK_SG200x_V2/host-tools/gcc/gcc-linaro-7.3.1-2018.05-x86_64_aarch64-linux-gnu/bin/aarch64-linux-gnu-
+
+CC            := $(CROSS_COMPILE)gcc
+LD            := $(CROSS_COMPILE)ld
+AR            := $(CROSS_COMPILE)ar
+STRIP         := $(CROSS_COMPILE)strip
+
+export ARCH CROSS_COMPILE
+
+#*******************************************************************************
+# Targets
+#*******************************************************************************
+.PHONY: all install clean
+
+ifeq ($(KERNELRELEASE),)
+all: init
+	@$(MAKE) modules         -C $(KERNEL_DIR) M=$(LOCAL_DIR) -j$(MULTI_CORES)
+#	@$(MAKE) modules_install -C $(KERNEL_DIR) M=$(LOCAL_DIR) INSTALL_MOD_PATH=$(KERNEL_DIR)/_install_modules INSTALL_MOD_DIR=private
+
+clean:
+#       File
+	@for n in *.o *.ko *.mod.c *.mod *.cmd *.symvers *.order; do \
+		find $(LOCAL_DIR) -type f -name $$n  -exec rm {} \;;\
+	done
+#       Directory
+	@if [ -d $(LOCAL_DIR)/output        ]; then rm -rf $(LOCAL_DIR)/output;        fi;
+	@if [ -d $(LOCAL_DIR)/__install     ]; then rm -rf $(LOCAL_DIR)/__install;     fi;
+	@if [ -d $(LOCAL_DIR)/.tmp_versions ]; then rm -rf $(LOCAL_DIR)/.tmp_versions; fi;
+
+
+install:
+	@mkdir -p $(INSTALL_DIR)/lib/modules/private
+	@install -m 644 -D $(MOD_NAME).ko $(INSTALL_DIR)/lib/modules/private;
+
+init:
+	@mkdir -p $(OUTPUT_DIR)
+
+else
+obj-m := $(MOD_NAME).o
+
+$(MOD_NAME)-objs := test_ps.o
+
+INC_DIRS :=
+
+ccflags-y +=
+
+EXTRA_CFLAGS += -Wno-error=date-time	# Fix compile error on gcc 4.9 and later
+EXTRA_CFLAGS += -Wno-date-time
+endif # ifeq ($(KERNELRELEASE),)

01-Debug/01-Panic/test_ps.c

@@ -0,0 +1,140 @@
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/delay.h>
+#include <linux/vmalloc.h>
+#include <linux/rcupdate.h>
+#include <linux/kthread.h>
+#include <linux/mutex.h>
+
+static unsigned int test_type;
+module_param(test_type, uint, 0400);
+MODULE_PARM_DESC(test_type, "set to 1 to try to OOM (default 0)");
+
+static int trigger_oops(void)
+{
+    int *ptr = (int *)0;               // 强制类型转换0地址为指针并尝试读取
+
+    printk(KERN_ALERT "Dereferenced NULL pointer value: %d\n", *ptr);
+
+    return 0;
+}
+
+static int trigger_oom(void)
+{
+    void *memory = NULL;
+    size_t memory_size = 0;
+
+    printk(KERN_INFO "oom_trigger: Initializing the oom_trigger LKM\n");
+
+    memory_size = 100*1024*1024;
+    while (1) { // 尝试分配大块内存
+        memory = vmalloc(memory_size);
+        if (!memory) {
+            printk(KERN_ALERT "oom_trigger: Memory allocation failed\n");
+            break;
+        }
+
+        // 仅为防止编译器优化，实际不访问分配的内存
+        memset(memory, 0, memory_size);
+    }
+
+    return 0;
+}
+
+static int test_data = 0;
+static struct rcu_head test_rcu_head;
+
+static void bad_rcu_callback(struct rcu_head *head)
+{
+    // 违规操作：在RCU回调函数中睡眠，这可能导致RCU grace period过长
+    msleep(1000);
+
+    // 违规操作：修改被RCU保护的数据结构
+    test_data++;  // 不应在RCU回调中修改全局变量
+
+    pr_info("Bad RCU callback executed\n");
+}
+
+static void trigger_rcu(void)
+{
+    pr_info("RCU error module loaded\n");
+
+    call_rcu(&test_rcu_head, bad_rcu_callback);
+}
+
+static int is_ready_thread1, is_ready_thread2;
+static struct task_struct *thread1;
+static struct task_struct *thread2;
+
+static DEFINE_MUTEX(mutex_a);
+static DEFINE_MUTEX(mutex_b);
+
+static int thread_func(void *data)
+{
+    char *name = (char *) data;
+
+    if (!strcmp(name, "Thread1")) {
+        printk(KERN_INFO "%s: Acquiring mutex A...\n", name);
+        mutex_lock(&mutex_a);
+        is_ready_thread1 = 1;
+        while (!is_ready_thread2);
+        printk(KERN_INFO "%s: Got mutex A. Now trying to acquire mutex B...\n", name);
+        mutex_lock(&mutex_b);  // This will block, causing deadlock
+        printk(KERN_INFO "%s: Got mutex B.\n", name);
+    } else {
+        printk(KERN_INFO "%s: Acquiring mutex B...\n", name);
+        mutex_lock(&mutex_b);
+        is_ready_thread2 = 1;
+        while (!is_ready_thread1);
+        printk(KERN_INFO "%s: Got mutex B. Now trying to acquire mutex A...\n", name);
+        mutex_lock(&mutex_a);  // This will block, causing deadlock
+        printk(KERN_INFO "%s: Got mutex A.\n", name);
+    }
+
+    return 0;
+}
+
+static int trigger_deadlock(void)
+{
+    thread1 = kthread_run(thread_func, (void *) "Thread1", "thread1");
+    if (IS_ERR(thread1)) {
+        printk(KERN_ERR "Failed to create thread1\n");
+        return PTR_ERR(thread1);
+    }
+
+    thread2 = kthread_run(thread_func, (void *) "Thread2", "thread2");
+    if (IS_ERR(thread2)) {
+        printk(KERN_ERR "Failed to create thread2\n");
+        kthread_stop(thread1);
+        return PTR_ERR(thread2);
+    }
+
+    return 0;
+}
+
+static int trigger_init(void) {
+    if (test_type == 0)
+        trigger_oops();
+    else if (test_type == 1)
+        trigger_oom();
+    else if (test_type == 2)
+        trigger_rcu();
+    else if (test_type == 3)
+        trigger_deadlock();
+
+    return 0;           // 加载模块不应该有返回值，但这里返回0避免编译警告。
+}
+
+static void __exit trigger_exit(void) {
+    if (test_type == 3) {
+        kthread_stop(thread1);
+        kthread_stop(thread2);
+        printk(KERN_INFO "Deadlock trigger exit.\n");
+    }
+}
+
+module_init(trigger_init);
+module_exit(trigger_exit);
+
+MODULE_LICENSE("GPL");

01-Debug/Makefile

@@ -0,0 +1,81 @@
+#*******************************************************************************
+# HangZhou Hikvision Digital Technology Co., Ltd. All Right Reserved.
+# Author       :
+# Version      : V1.0.0  2020.10.21
+# Description  :
+# Note         : yegaoyang@hikvision.com.cn     Modified        2020.10.21
+#*******************************************************************************
+
+#*******************************************************************************
+# Path information
+#*******************************************************************************
+LOCAL_DIR    := $(realpath $(dir $(lastword $(MAKEFILE_LIST))))
+KERNEL_DIR   ?= /home/gaoyang3513/Source/06-SG20x/02-Projects/SDK_SG200x_V2/linux_5.10/build/sg2000_milkv_duos_glibc_arm64_sd
+#KERNEL_DIR   ?= $(HOME)/Source/06-SG20x/02-Projects/SDK_SG200x_V2/linux_5.10/build/sg2000_milkv_duos_glibc_arm64_sd/
+
+# ParDirectory
+LIBS_DIR     :=
+INCLUDE_DIR  :=
+
+# Subdirectory
+SUB_DIRS := $(LOCAL_DIR)/01-Panic
+
+# Output
+OUTPUT_DIR   := $(LOCAL_DIR)/output
+INSTALL_DIR  ?= $(LOCAL_DIR)/__install
+
+#*******************************************************************************
+# Variables
+#*******************************************************************************
+MULTI_CORES ?= $(shell grep -c ^processor /proc/cpuinfo)
+
+MOD_NAME := test_panic
+
+#*******************************************************************************
+# Compile configure
+#*******************************************************************************
+ARCH          ?= arm64
+CROSS_COMPILE ?= ${HOME}/Source/06-SG20x/02-Projects/SDK_SG200x_V2/host-tools/gcc/gcc-linaro-7.3.1-2018.05-x86_64_aarch64-linux-gnu/bin/aarch64-linux-gnu-
+
+CC            := $(CROSS_COMPILE)gcc
+LD            := $(CROSS_COMPILE)ld
+AR            := $(CROSS_COMPILE)ar
+STRIP         := $(CROSS_COMPILE)strip
+
+export ARCH CROSS_COMPILE
+
+#*******************************************************************************
+# Targets
+#*******************************************************************************
+.PHONY: init all clean install menuconfig
+
+ifeq ($(KERNELRELEASE),)
+all: init
+	@for sub in $(SUB_DIRS); do \
+		$(MAKE)                                   -C $$sub || exit "$$?"; \
+		$(MAKE) install INSTALL_DIR=$(OUTPUT_DIR) -C $$sub || exit "$$?"; \
+	done;
+
+clean:
+	@for sub in $(SUB_DIRS); do \
+		$(MAKE) clean -C $$sub || exit "$$?"; \
+	done;
+#       Directory
+	@if [ -d $(LOCAL_DIR)/output        ]; then rm -rf $(LOCAL_DIR)/output;        fi;
+	@if [ -d $(LOCAL_DIR)/__install     ]; then rm -rf $(LOCAL_DIR)/__install;     fi;
+
+install:
+	@mkdir -p $(INSTALL_DIR)
+	@cp -arf $(OUTPUT_DIR)/. $(INSTALL_DIR)
+
+init:
+	@mkdir -p $(OUTPUT_DIR);
+else
+# called from kernel build system: just declare what our modules are
+obj-y += $(SUB_DIRS)
+
+INC_DIRS :=
+
+subdir-ccflags-y += $(addprefix -I, $(INC_DIRS))
+
+endif # ifeq ($(KERNELRELEASE),)

Makefile

@@ -24,7 +24,7 @@ INSTALL_DIR  ?= $(LOCAL_DIR)/__install
 #*******************************************************************************
 MULTI_CORES ?= $(shell grep -c ^processor /proc/cpuinfo)
 
-SUB_DIRS := spi/
+SUB_DIRS := 01-Debug/
 
 #*******************************************************************************
 # Compile configure

spi/01-NFC_PN5180/Makefile

@@ -49,7 +49,7 @@ else
 
 all: init
 	@$(MAKE) modules         -C $(KERNEL_DIR) M=$(LOCAL_DIR) -j$(MULTI_CORES)
-	@$(MAKE) modules_install -C $(KERNEL_DIR) M=$(LOCAL_DIR) INSTALL_MOD_PATH=$(KERNEL_DIR)/_install_modules INSTALL_MOD_DIR=private
+#	@$(MAKE) modules_install -C $(KERNEL_DIR) M=$(LOCAL_DIR) INSTALL_MOD_PATH=$(KERNEL_DIR)/_install_modules INSTALL_MOD_DIR=private
 
 clean:
 #       File

spi/02-Sub1G_CMT2301/Makefile

@@ -49,7 +49,7 @@ else
 
 all: init
 	@$(MAKE) modules         -C $(KERNEL_DIR) M=$(LOCAL_DIR) -j$(MULTI_CORES)
-	@$(MAKE) modules_install -C $(KERNEL_DIR) M=$(LOCAL_DIR) INSTALL_MOD_PATH=$(KERNEL_DIR)/_install_modules INSTALL_MOD_DIR=private
+#	@$(MAKE) modules_install -C $(KERNEL_DIR) M=$(LOCAL_DIR) INSTALL_MOD_PATH=$(KERNEL_DIR)/_install_modules INSTALL_MOD_DIR=private
 
 clean:
 #       File

spi/Makefile

@@ -12,8 +12,8 @@
 LOCAL_DIR    := $(realpath $(dir $(lastword $(MAKEFILE_LIST))))
 
 # Subdirectory
-PN5180_DIR   := 01-NFC_PN5180
+PN5180_DIR   := $(LOCAL_DIR)/01-NFC_PN5180
-CMT2301_DIR  := 02-Sub1G_CMT2301
+CMT2301_DIR  := $(LOCAL_DIR)/02-Sub1G_CMT2301
 
 OUTPUT_DIR   := $(LOCAL_DIR)/output
 INSTALL_DIR  ?= $(LOCAL_DIR)/__install