From 89b6137144a69c4f4165d7dc2297eebe12400a3b Mon Sep 17 00:00:00 2001
From: root <root@debian-BULLSEYE-live-builder-AMD64>
Date: Wed, 20 Sep 2023 14:51:17 +0200
Subject: [PATCH] Feat: real great work made by valentin and adil, in a great
communion of spirit
---
work/hello-1/Makefile | 5 +-
work/hello-1/hello | Bin 0 -> 15952 bytes
work/hello-1/hello-1.mod.c | 47 ++++++++++
work/hello-1/hello-2.c | 24 +++++
work/hello-1/hello-2.mod.c | 47 ++++++++++
work/hello-1/hello-3.c | 26 ++++++
work/hello-1/hello-3.mod.c | 47 ++++++++++
work/hello-1/hello-5.c | 68 ++++++++++++++
work/hello-1/hello-5.mod.c | 52 +++++++++++
work/hello-1/hello.c | 7 ++
work/hello-1/modules.order | 4 +
work/tp1/Makefile | 9 ++
work/tp1/chardev.c | 184 +++++++++++++++++++++++++++++++++++++
work/tp1/chardev.mod.c | 57 ++++++++++++
work/tp1/modules.order | 1 +
15 files changed, 577 insertions(+), 1 deletion(-)
create mode 100755 work/hello-1/hello
create mode 100644 work/hello-1/hello-1.mod.c
create mode 100644 work/hello-1/hello-2.c
create mode 100644 work/hello-1/hello-2.mod.c
create mode 100644 work/hello-1/hello-3.c
create mode 100644 work/hello-1/hello-3.mod.c
create mode 100644 work/hello-1/hello-5.c
create mode 100644 work/hello-1/hello-5.mod.c
create mode 100644 work/hello-1/hello.c
create mode 100644 work/hello-1/modules.order
create mode 100644 work/tp1/Makefile
create mode 100644 work/tp1/chardev.c
create mode 100644 work/tp1/chardev.mod.c
create mode 100644 work/tp1/modules.order
diff --git a/work/hello-1/Makefile b/work/hello-1/Makefile
index 5288f36..b06c2df 100644
--- a/work/hello-1/Makefile
+++ b/work/hello-1/Makefile
@@ -1,6 +1,9 @@
KDIR=../../build/kvm/
-obj-m += hello-1.o
+obj-m += hello-1.o
+obj-m += hello-2.o
+obj-m += hello-3.o
+obj-m += hello-5.o
PWD := $(CURDIR)
all:
diff --git a/work/hello-1/hello b/work/hello-1/hello
new file mode 100755
index 0000000000000000000000000000000000000000..297a392588eb66dbe792595b2e025125c668e489
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diff --git a/work/hello-1/hello-1.mod.c b/work/hello-1/hello-1.mod.c
new file mode 100644
index 0000000..c50ac50
--- /dev/null
+++ b/work/hello-1/hello-1.mod.c
@@ -0,0 +1,47 @@
+#include <linux/module.h>
+#define INCLUDE_VERMAGIC
+#include <linux/build-salt.h>
+#include <linux/elfnote-lto.h>
+#include <linux/export-internal.h>
+#include <linux/vermagic.h>
+#include <linux/compiler.h>
+
+#ifdef CONFIG_UNWINDER_ORC
+#include <asm/orc_header.h>
+ORC_HEADER;
+#endif
+
+BUILD_SALT;
+BUILD_LTO_INFO;
+
+MODULE_INFO(vermagic, VERMAGIC_STRING);
+MODULE_INFO(name, KBUILD_MODNAME);
+
+__visible struct module __this_module
+__section(".gnu.linkonce.this_module") = {
+ .name = KBUILD_MODNAME,
+ .init = init_module,
+#ifdef CONFIG_MODULE_UNLOAD
+ .exit = cleanup_module,
+#endif
+ .arch = MODULE_ARCH_INIT,
+};
+
+#ifdef CONFIG_RETPOLINE
+MODULE_INFO(retpoline, "Y");
+#endif
+
+
+
+static const struct modversion_info ____versions[]
+__used __section("__versions") = {
+ { 0xbdfb6dbb, "__fentry__" },
+ { 0x122c3a7e, "_printk" },
+ { 0x5b8239ca, "__x86_return_thunk" },
+ { 0x76800044, "module_layout" },
+};
+
+MODULE_INFO(depends, "");
+
+
+MODULE_INFO(srcversion, "93D1874613E2633FD08C40F");
diff --git a/work/hello-1/hello-2.c b/work/hello-1/hello-2.c
new file mode 100644
index 0000000..336c9c3
--- /dev/null
+++ b/work/hello-1/hello-2.c
@@ -0,0 +1,24 @@
+/*
+ * hello-1.c - The simplest kernel module.
+ */
+#include <linux/init.h> /* Needed for the macros */
+#include <linux/module.h> /* Needed by all modules */
+#include <linux/printk.h> /* Needed for pr_info() */
+
+static int __init hello_2_init(void)
+{
+ pr_info("Hello world 2.\n");
+
+ /* A non 0 return means init_module failed; module can't be loaded. */
+ return 0;
+}
+
+static void __exit hello_2_exit(void)
+{
+ pr_info("Goodbye world 2.\n");
+}
+
+module_init(hello_2_init);
+module_exit(hello_2_exit);
+
+MODULE_LICENSE("GPL");
diff --git a/work/hello-1/hello-2.mod.c b/work/hello-1/hello-2.mod.c
new file mode 100644
index 0000000..44d3a1a
--- /dev/null
+++ b/work/hello-1/hello-2.mod.c
@@ -0,0 +1,47 @@
+#include <linux/module.h>
+#define INCLUDE_VERMAGIC
+#include <linux/build-salt.h>
+#include <linux/elfnote-lto.h>
+#include <linux/export-internal.h>
+#include <linux/vermagic.h>
+#include <linux/compiler.h>
+
+#ifdef CONFIG_UNWINDER_ORC
+#include <asm/orc_header.h>
+ORC_HEADER;
+#endif
+
+BUILD_SALT;
+BUILD_LTO_INFO;
+
+MODULE_INFO(vermagic, VERMAGIC_STRING);
+MODULE_INFO(name, KBUILD_MODNAME);
+
+__visible struct module __this_module
+__section(".gnu.linkonce.this_module") = {
+ .name = KBUILD_MODNAME,
+ .init = init_module,
+#ifdef CONFIG_MODULE_UNLOAD
+ .exit = cleanup_module,
+#endif
+ .arch = MODULE_ARCH_INIT,
+};
+
+#ifdef CONFIG_RETPOLINE
+MODULE_INFO(retpoline, "Y");
+#endif
+
+
+
+static const struct modversion_info ____versions[]
+__used __section("__versions") = {
+ { 0x5b8239ca, "__x86_return_thunk" },
+ { 0xbdfb6dbb, "__fentry__" },
+ { 0x122c3a7e, "_printk" },
+ { 0x76800044, "module_layout" },
+};
+
+MODULE_INFO(depends, "");
+
+
+MODULE_INFO(srcversion, "429C9C7906F80F08EC81A8E");
diff --git a/work/hello-1/hello-3.c b/work/hello-1/hello-3.c
new file mode 100644
index 0000000..28b7f9e
--- /dev/null
+++ b/work/hello-1/hello-3.c
@@ -0,0 +1,26 @@
+/*
+ * hello-1.c - The simplest kernel module.
+ */
+#include <linux/init.h> /* Needed for the macros */
+#include <linux/module.h> /* Needed by all modules */
+#include <linux/printk.h> /* Needed for pr_info() */
+
+static int hello3_data __initdata = 3;
+
+static int __init hello_3_init(void)
+{
+ pr_info("Hello world %d.\n", hello3_data);
+
+ /* A non 0 return means init_module failed; module can't be loaded. */
+ return 0;
+}
+
+static void __exit hello_3_exit(void)
+{
+ pr_info("Goodbye world 3.\n");
+}
+
+module_init(hello_3_init);
+module_exit(hello_3_exit);
+
+MODULE_LICENSE("GPL");
diff --git a/work/hello-1/hello-3.mod.c b/work/hello-1/hello-3.mod.c
new file mode 100644
index 0000000..ab3d9de
--- /dev/null
+++ b/work/hello-1/hello-3.mod.c
@@ -0,0 +1,47 @@
+#include <linux/module.h>
+#define INCLUDE_VERMAGIC
+#include <linux/build-salt.h>
+#include <linux/elfnote-lto.h>
+#include <linux/export-internal.h>
+#include <linux/vermagic.h>
+#include <linux/compiler.h>
+
+#ifdef CONFIG_UNWINDER_ORC
+#include <asm/orc_header.h>
+ORC_HEADER;
+#endif
+
+BUILD_SALT;
+BUILD_LTO_INFO;
+
+MODULE_INFO(vermagic, VERMAGIC_STRING);
+MODULE_INFO(name, KBUILD_MODNAME);
+
+__visible struct module __this_module
+__section(".gnu.linkonce.this_module") = {
+ .name = KBUILD_MODNAME,
+ .init = init_module,
+#ifdef CONFIG_MODULE_UNLOAD
+ .exit = cleanup_module,
+#endif
+ .arch = MODULE_ARCH_INIT,
+};
+
+#ifdef CONFIG_RETPOLINE
+MODULE_INFO(retpoline, "Y");
+#endif
+
+
+
+static const struct modversion_info ____versions[]
+__used __section("__versions") = {
+ { 0x5b8239ca, "__x86_return_thunk" },
+ { 0xbdfb6dbb, "__fentry__" },
+ { 0x122c3a7e, "_printk" },
+ { 0x76800044, "module_layout" },
+};
+
+MODULE_INFO(depends, "");
+
+
+MODULE_INFO(srcversion, "C0F43BFE7A1B717A042758A");
diff --git a/work/hello-1/hello-5.c b/work/hello-1/hello-5.c
new file mode 100644
index 0000000..01a180b
--- /dev/null
+++ b/work/hello-1/hello-5.c
@@ -0,0 +1,68 @@
+/*
+ * hello-5.c - Demonstrates command line argument passing to a module.
+ */
+#include <linux/init.h>
+#include <linux/kernel.h> /* for ARRAY_SIZE() */
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/printk.h>
+#include <linux/stat.h>
+
+MODULE_LICENSE("GPL");
+
+static short int myshort = 1;
+static int myint = 420;
+static long int mylong = 9999;
+static char *mystring = "blah";
+static int myintarray[2] = { 420, 420 };
+static int arr_argc = 0;
+
+/* module_param(foo, int, 0000)
+ * The first param is the parameters name.
+ * The second param is its data type.
+ * The final argument is the permissions bits,
+ * for exposing parameters in sysfs (if non-zero) at a later stage.
+ */
+module_param(myshort, short, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP);
+MODULE_PARM_DESC(myshort, "A short integer");
+module_param(myint, int, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH);
+MODULE_PARM_DESC(myint, "An integer");
+module_param(mylong, long, S_IRUSR);
+MODULE_PARM_DESC(mylong, "A long integer");
+module_param(mystring, charp, 0000);
+MODULE_PARM_DESC(mystring, "A character string");
+
+/* module_param_array(name, type, num, perm);
+ * The first param is the parameter's (in this case the array's) name.
+ * The second param is the data type of the elements of the array.
+ * The third argument is a pointer to the variable that will store the number
+ * of elements of the array initialized by the user at module loading time.
+ * The fourth argument is the permission bits.
+ */
+module_param_array(myintarray, int, &arr_argc, 0000);
+MODULE_PARM_DESC(myintarray, "An array of integers");
+
+static int __init hello_5_init(void)
+{
+ int i;
+
+ pr_info("Hello, world 5\n=============\n");
+ pr_info("myshort is a short integer: %hd\n", myshort);
+ pr_info("myint is an integer: %d\n", myint);
+ pr_info("mylong is a long integer: %ld\n", mylong);
+ pr_info("mystring is a string: %s\n", mystring);
+
+ for (i = 0; i < ARRAY_SIZE(myintarray); i++)
+ pr_info("myintarray[%d] = %d\n", i, myintarray[i]);
+
+ pr_info("got %d arguments for myintarray.\n", arr_argc);
+ return 0;
+}
+
+static void __exit hello_5_exit(void)
+{
+ pr_info("Goodbye, world 5\n");
+}
+
+module_init(hello_5_init);
+module_exit(hello_5_exit);
\ No newline at end of file
diff --git a/work/hello-1/hello-5.mod.c b/work/hello-1/hello-5.mod.c
new file mode 100644
index 0000000..beaec19
--- /dev/null
+++ b/work/hello-1/hello-5.mod.c
@@ -0,0 +1,52 @@
+#include <linux/module.h>
+#define INCLUDE_VERMAGIC
+#include <linux/build-salt.h>
+#include <linux/elfnote-lto.h>
+#include <linux/export-internal.h>
+#include <linux/vermagic.h>
+#include <linux/compiler.h>
+
+#ifdef CONFIG_UNWINDER_ORC
+#include <asm/orc_header.h>
+ORC_HEADER;
+#endif
+
+BUILD_SALT;
+BUILD_LTO_INFO;
+
+MODULE_INFO(vermagic, VERMAGIC_STRING);
+MODULE_INFO(name, KBUILD_MODNAME);
+
+__visible struct module __this_module
+__section(".gnu.linkonce.this_module") = {
+ .name = KBUILD_MODNAME,
+ .init = init_module,
+#ifdef CONFIG_MODULE_UNLOAD
+ .exit = cleanup_module,
+#endif
+ .arch = MODULE_ARCH_INIT,
+};
+
+#ifdef CONFIG_RETPOLINE
+MODULE_INFO(retpoline, "Y");
+#endif
+
+
+
+static const struct modversion_info ____versions[]
+__used __section("__versions") = {
+ { 0x5b8239ca, "__x86_return_thunk" },
+ { 0x18121e8f, "param_array_ops" },
+ { 0xd61b6a34, "param_ops_int" },
+ { 0x65e16dde, "param_ops_charp" },
+ { 0x16db37eb, "param_ops_long" },
+ { 0xe284dd72, "param_ops_short" },
+ { 0xbdfb6dbb, "__fentry__" },
+ { 0x122c3a7e, "_printk" },
+ { 0x76800044, "module_layout" },
+};
+
+MODULE_INFO(depends, "");
+
+
+MODULE_INFO(srcversion, "9FCBEE8537BAB4A242DD00B");
diff --git a/work/hello-1/hello.c b/work/hello-1/hello.c
new file mode 100644
index 0000000..736356e
--- /dev/null
+++ b/work/hello-1/hello.c
@@ -0,0 +1,7 @@
+#include <stdio.h>
+
+int main(void)
+{
+ printf("hello");
+ return 0;
+}
\ No newline at end of file
diff --git a/work/hello-1/modules.order b/work/hello-1/modules.order
new file mode 100644
index 0000000..07bfd42
--- /dev/null
+++ b/work/hello-1/modules.order
@@ -0,0 +1,4 @@
+/root/Desktop/asee/work/hello-1/hello-1.o
+/root/Desktop/asee/work/hello-1/hello-2.o
+/root/Desktop/asee/work/hello-1/hello-3.o
+/root/Desktop/asee/work/hello-1/hello-5.o
diff --git a/work/tp1/Makefile b/work/tp1/Makefile
new file mode 100644
index 0000000..837cdd1
--- /dev/null
+++ b/work/tp1/Makefile
@@ -0,0 +1,9 @@
+KDIR=../../build/kvm/
+
+obj-m += chardev.o
+PWD := $(CURDIR)
+
+all:
+ make -C $(KDIR) M=$(PWD) modules
+clean:
+ make -C $(KDIR) M=$(PWD) clean
diff --git a/work/tp1/chardev.c b/work/tp1/chardev.c
new file mode 100644
index 0000000..e249f14
--- /dev/null
+++ b/work/tp1/chardev.c
@@ -0,0 +1,184 @@
+/*
+ * chardev.c: Creates a read-only char device that says how many times
+ * you have read from the dev file
+ */
+
+#include <linux/atomic.h>
+#include <linux/cdev.h>
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <linux/fs.h>
+#include <linux/init.h>
+#include <linux/kernel.h> /* for sprintf() */
+#include <linux/module.h>
+#include <linux/printk.h>
+#include <linux/types.h>
+#include <linux/uaccess.h> /* for get_user and put_user */
+#include <linux/version.h>
+
+#include <asm/errno.h>
+
+/* Prototypes - this would normally go in a .h file */
+static int device_open(struct inode *, struct file *);
+static int device_release(struct inode *, struct file *);
+static ssize_t device_read(struct file *, char __user *, size_t, loff_t *);
+static ssize_t device_write(struct file *, const char __user *, size_t,
+ loff_t *);
+
+#define SUCCESS 0
+#define DEVICE_NAME "asee_mod" /* Dev name as it appears in /proc/devices */
+#define BUF_LEN 16 /* Max length of the message from the device */
+
+/* Global variables are declared as static, so are global within the file. */
+
+static int major; /* major number assigned to our device driver */
+
+enum {
+ CDEV_NOT_USED = 0,
+ CDEV_EXCLUSIVE_OPEN = 1,
+};
+
+/* Is device open? Used to prevent multiple access to device */
+static atomic_t already_open = ATOMIC_INIT(CDEV_NOT_USED);
+
+static char msg[BUF_LEN + 1]; /* The msg the device will give when asked */
+
+static struct class *cls;
+
+static struct file_operations chardev_fops = {
+ .read = device_read,
+ .write = device_write,
+ .open = device_open,
+ .release = device_release,
+};
+
+static int __init chardev_init(void)
+{
+ major = register_chrdev(0, DEVICE_NAME, &chardev_fops);
+
+ if (major < 0) {
+ pr_alert("Registering char device failed with %d\n", major);
+ return major;
+ }
+
+ pr_info("I was assigned major number %d.\n", major);
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(6, 4, 0)
+ cls = class_create(DEVICE_NAME);
+#else
+ cls = class_create(THIS_MODULE, DEVICE_NAME);
+#endif
+ device_create(cls, NULL, MKDEV(major, 0), NULL, DEVICE_NAME);
+
+ pr_info("Device created on /dev/%s\n", DEVICE_NAME);
+
+ return SUCCESS;
+}
+
+static void __exit chardev_exit(void)
+{
+ device_destroy(cls, MKDEV(major, 0));
+ class_destroy(cls);
+
+ /* Unregister the device */
+ unregister_chrdev(major, DEVICE_NAME);
+}
+
+/* Methods */
+
+/* Called when a process tries to open the device file, like
+ * "sudo cat /dev/chardev"
+ */
+static int device_open(struct inode *inode, struct file *file)
+{
+ if (atomic_cmpxchg(&already_open, CDEV_NOT_USED, CDEV_EXCLUSIVE_OPEN))
+ return -EBUSY;
+
+
+ pr_info("%s\n", msg);
+ try_module_get(THIS_MODULE);
+
+ return SUCCESS;
+}
+
+/* Called when a process closes the device file. */
+static int device_release(struct inode *inode, struct file *file)
+{
+ /* We're now ready for our next caller */
+ atomic_set(&already_open, CDEV_NOT_USED);
+
+ /* Decrement the usage count, or else once you opened the file, you will
+ * never get rid of the module.
+ */
+ module_put(THIS_MODULE);
+
+ return SUCCESS;
+}
+
+/* Called when a process, which already opened the dev file, attempts to
+ * read from it.
+ */
+static int last_writen_bytes;
+static int bytes_in_buffer = 0;
+static ssize_t device_read(struct file *filp, /* see include/linux/fs.h */
+ char __user *buffer, /* buffer to fill with data */
+ size_t length, /* length of the buffer */
+ loff_t *offset)
+{
+ /* Number of bytes actually written to the buffer */
+ int bytes_read = 0;
+ char *msg_ptr = msg;
+
+ /* Actually put the data into the buffer */
+ while (bytes_in_buffer > 0) {
+ if (last_writen_bytes >= BUF_LEN) {
+ last_writen_bytes = 0;
+ }
+ /* The buffer is in the user data segment, not the kernel
+ * segment so "*" assignment won't work. We have to use
+ * put_user which copies data from the kernel data segment to
+ * the user data segment.
+ */
+
+ put_user(*(msg_ptr + last_writen_bytes), buffer++);
+ // Try to clear the read
+ *(msg_ptr + last_writen_bytes) = '\0';
+ last_writen_bytes++;
+ bytes_in_buffer--;
+ bytes_read++;
+ }
+
+ *offset = last_writen_bytes;
+
+ /* Most read functions return the number of bytes put into the buffer. */
+ return bytes_read;
+}
+
+/* Called when a process writes to dev file: echo "hi" > /dev/hello */
+static ssize_t device_write(struct file *filp, const char __user *buff,
+ size_t len, loff_t *off)
+{
+ int bytes_writen = 0;
+
+ int current_bytes = last_writen_bytes;
+
+ for (int cpt = 0; cpt < len; cpt++) {
+ if (current_bytes >= BUF_LEN) {
+ current_bytes = 0;
+ }
+ get_user(*(msg + current_bytes), buff + cpt);
+ current_bytes++;
+ bytes_writen++;
+ bytes_in_buffer++;
+ }
+
+ last_writen_bytes = current_bytes;
+ *off = last_writen_bytes;
+
+ return bytes_writen;
+}
+
+module_init(chardev_init);
+module_exit(chardev_exit);
+
+MODULE_LICENSE("GPL");
\ No newline at end of file
diff --git a/work/tp1/chardev.mod.c b/work/tp1/chardev.mod.c
new file mode 100644
index 0000000..c424c1d
--- /dev/null
+++ b/work/tp1/chardev.mod.c
@@ -0,0 +1,57 @@
+#include <linux/module.h>
+#define INCLUDE_VERMAGIC
+#include <linux/build-salt.h>
+#include <linux/elfnote-lto.h>
+#include <linux/export-internal.h>
+#include <linux/vermagic.h>
+#include <linux/compiler.h>
+
+#ifdef CONFIG_UNWINDER_ORC
+#include <asm/orc_header.h>
+ORC_HEADER;
+#endif
+
+BUILD_SALT;
+BUILD_LTO_INFO;
+
+MODULE_INFO(vermagic, VERMAGIC_STRING);
+MODULE_INFO(name, KBUILD_MODNAME);
+
+__visible struct module __this_module
+__section(".gnu.linkonce.this_module") = {
+ .name = KBUILD_MODNAME,
+ .init = init_module,
+#ifdef CONFIG_MODULE_UNLOAD
+ .exit = cleanup_module,
+#endif
+ .arch = MODULE_ARCH_INIT,
+};
+
+#ifdef CONFIG_RETPOLINE
+MODULE_INFO(retpoline, "Y");
+#endif
+
+
+
+static const struct modversion_info ____versions[]
+__used __section("__versions") = {
+ { 0x122c3a7e, "_printk" },
+ { 0x47143bb3, "try_module_get" },
+ { 0x73895700, "__register_chrdev" },
+ { 0xfb890f0b, "class_create" },
+ { 0x41b15bc9, "device_create" },
+ { 0xf23bcaeb, "device_destroy" },
+ { 0xfdfe3852, "class_destroy" },
+ { 0x6bc3fbc0, "__unregister_chrdev" },
+ { 0xbdfb6dbb, "__fentry__" },
+ { 0xc3aaf0a9, "__put_user_1" },
+ { 0x5b8239ca, "__x86_return_thunk" },
+ { 0x167e7f9d, "__get_user_1" },
+ { 0xab632ed, "module_put" },
+ { 0x76800044, "module_layout" },
+};
+
+MODULE_INFO(depends, "");
+
+
+MODULE_INFO(srcversion, "9201228D14671D604AADDD7");
diff --git a/work/tp1/modules.order b/work/tp1/modules.order
new file mode 100644
index 0000000..c25b792
--- /dev/null
+++ b/work/tp1/modules.order
@@ -0,0 +1 @@
+/root/Desktop/asee/work/tp1/chardev.o
--
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