update

src/Others/1.5.9_linux_kernel/config-fragment

@@ -0,0 +1,14 @@
+CONFIG_DEBUG_INFO=y
+CONFIG_DEBUG_INFO_REDUCED=n
+CONFIG_GDB_SCRIPTS=y
+
+CONFIG_STRICT_KERNEL_RWX=n
+CONFIG_FRAME_POINTER=y
+CONFIG_KGDB=y
+CONFIG_KGDB_SERIAL_CONSOLE=y
+
+CONFIG_KGDB_KDB=y
+CONFIG_KDB_KEYBOARD=y
+
+CONFIG_RANDOMIZE_BASE=n
+CONFIG_RANDOMIZE_MEMORY=n

src/Others/1.5.9_linux_kernel/hello32.S

@@ -0,0 +1,19 @@
+.data
+
+msg:
+    .ascii "hello 32-bit!\n"
+    len = . - msg
+
+.text
+    .global _start
+
+_start:
+    movl $len, %edx
+    movl $msg, %ecx
+    movl $1, %ebx
+    movl $4, %eax
+    int $0x80
+
+    movl $0, %ebx
+    movl $1, %eax
+    int $0x80

src/Others/1.5.9_linux_kernel/hello64.S

@@ -0,0 +1,19 @@
+.data
+
+msg:
+    .ascii "Hello 64-bit!\n"
+    len = . - msg
+
+.text
+    .global _start
+
+_start:
+    movq  $1, %rdi
+    movq  $msg, %rsi
+    movq  $len, %rdx
+    movq  $1, %rax
+    syscall
+
+    xorq  %rdi, %rdi
+    movq  $60, %rax
+    syscall

src/Others/4.1_linux_kernel_debug/Makefile

@@ -0,0 +1,8 @@
+BUILDPATH := ~/kernelbuild/linux-4.16.3/
+obj-m += hello.o
+
+all:
+	make -C $(BUILDPATH) M=$(PWD) modules
+
+clean:
+	make -C $(BUILDPATH) M=$(PWD) clean

src/Others/4.1_linux_kernel_debug/create_initramfs.sh

@@ -0,0 +1,4 @@
+#!/bin/bash
+
+cd ./initramfs/
+find . -print0 | cpio --null -ov --format=newc | gzip -9 > ../initramfs.cpio.gz

src/Others/4.1_linux_kernel_debug/hello.c

@@ -0,0 +1,20 @@
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+
+static int hello_init(void)
+{
+        printk(KERN_ALERT "Hello module!\n");
+        return 0;
+}
+
+static void hello_exit(void)
+{
+        printk(KERN_ALERT "Goodbye module!\n");
+}
+
+module_init(hello_init);
+module_exit(hello_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("A simple module.");