完善了list/rbtree遍历进程虚拟地址空间vm_area_struct的学习代码--驱动print_vmarea

Makefile

@@ -2,7 +2,7 @@ all:github
 
 
 
-COMMIT="完善了thread_info的学习代码--print_thread_info驱动"
+COMMIT="完善了list/rbtree遍历进程虚拟地址空间vm_area_struct的学习代码--驱动print_vmarea"
 
 .PHONY	:	github
 github:

study/kernel/01-process/01-task/print_thread_info/print_thread_info.c

@@ -81,7 +81,7 @@ unsigned long show_kstack(union thread_union *threadunion)
     unsigned long kstack_thread = (unsigned long)threadunion->stack;
     unsigned long kstack_task   = (unsigned long)threadunion->thread_info.task->stack;
 
-    printk(KERN_INFO "THREAD_SIZE           : %ld == %ld == %ldKB",
+    printk(KERN_INFO "THREAD_SIZE           : %ldB == %ldB == %ldKB",
            sizeof(union thread_union), THREAD_SIZE, THREAD_SIZE / 1024);
     //printk(KERN_INFO "THREAD_MASK           : 0x%x\n", ~(THREAD_SIZE - 1));
 

study/kernel/01-process/01-task/print_vmarea/.print_vmarea.ko.cmd

@@ -1 +0,0 @@
-cmd_/home/gatieme/Work/GitHub/LDD-LinuxDeviceDrivers/study/kernel/01-process/01-task/print_vmarea/print_vmarea.ko := ld -r -m elf_x86_64 -T ./scripts/module-common.lds --build-id  -o /home/gatieme/Work/GitHub/LDD-LinuxDeviceDrivers/study/kernel/01-process/01-task/print_vmarea/print_vmarea.ko /home/gatieme/Work/GitHub/LDD-LinuxDeviceDrivers/study/kernel/01-process/01-task/print_vmarea/print_vmarea.o /home/gatieme/Work/GitHub/LDD-LinuxDeviceDrivers/study/kernel/01-process/01-task/print_vmarea/print_vmarea.mod.o

study/kernel/01-process/01-task/print_vmarea/.tmp_versions/print_vmarea.mod

@@ -1,2 +0,0 @@
-/home/gatieme/Work/GitHub/LDD-LinuxDeviceDrivers/study/kernel/01-process/01-task/print_vmarea/print_vmarea.ko
-/home/gatieme/Work/GitHub/LDD-LinuxDeviceDrivers/study/kernel/01-process/01-task/print_vmarea/print_vmarea.o

study/kernel/01-process/01-task/print_vmarea/Makefile

@@ -16,3 +16,17 @@ clean:
 
 
 endif
+
+
+
+insmod:
+	sudo insmod ./print_vmarea.ko
+
+rmmod:
+	sudo rmmod print_vmarea
+
+reinsmod:
+	make rmmod
+	make insmod
+
+

study/kernel/01-process/01-task/print_vmarea/modules.order

@@ -1 +0,0 @@
-kernel//home/gatieme/Work/GitHub/LDD-LinuxDeviceDrivers/study/kernel/01-process/01-task/print_vmarea/print_vmarea.ko

study/kernel/01-process/01-task/print_vmarea/print_vmarea.c

@@ -18,6 +18,9 @@
 #endif
 
 
+
+#define STACK_SIZE  (8192 * 1024)
+
 static int pid = 1;
 
 module_param(pid,int,0644);
@@ -47,15 +50,12 @@ void print_vmraea_node(struct vm_area_struct *vmnode)
 }
 
 
-static void printvm_list(struct vm_area_struct *vmlist)
+static void print_vm_list(struct vm_area_struct *vmlist)
 {
     struct vm_area_struct   *vmnode = vmlist;
 
-	printk("0x%lx - 0x%lx\t",vmnode->vm_start,vmnode->vm_end);
-
     while (vmnode != NULL)
     {
-
         print_vmraea_node(vmnode);
 
         vmnode = vmnode->vm_next;
@@ -71,36 +71,57 @@ static void visit(struct rb_node *root)
     print_vmraea_node(vmnode);
 }
 
-static void print_rb_tree(struct rb_node *root)
+
+static void print_vm_rb_tree(struct rb_node *root)
 {
 	if (root != NULL)
     {
+		print_vm_rb_tree(root->rb_left);
 		visit(root);
-		print_rb_tree(root->rb_left);
-		print_rb_tree(root->rb_right);
+		print_vm_rb_tree(root->rb_right);
 	}
 }
 
+
+void print_mm_struct(struct mm_struct *mm)
+{
+    printk("code : [0x%lx, 0x%lx]\n", mm->start_code, mm->end_code);
+    printk("data : [0x%lx, 0x%lx]\n", mm->start_data, mm->end_data);
+
+    //  heap从低地址向高地址扩展，做内存管理相对要简单些。
+    //  stack从高地址向低地址扩展，这样栈空间的起始位置就能确定下来，动态的调整栈空间大>
+    printk("heap : [0x%lx, 0x%lx]\n", mm->start_brk, mm->brk);
+    printk("stack: [0x%lx, 0x%lx]\n", mm->start_stack - STACK_SIZE, mm->start_stack);
+}
+
+
 static void print_vmarea(void)
 {
     struct task_struct      *p = NULL;
 	struct pid              *k = NULL;
+
+    struct  mm_struct       *mm = NULL;
+
     struct vm_area_struct   *vmlist = NULL;
 	struct rb_node          *root = NULL;
 
 	k = find_vpid(pid);
 	p = pid_task(k, PIDTYPE_PID);
 
+    mm = p->mm;
+    print_mm_struct(mm);
+
     //  visit vmarea by list
 	printk("-------[visit vmarea by list   START]-------\n");
-    vmlist = p->mm->mmap;
-    printvm_list(vmlist);
+    vmlist = mm->mmap;
+    print_vm_list(vmlist);
 	printk("-------[visit vmarea by list     END]-------\n");
 
     // visit vmarea by rbtree
 	printk("-------[visit vmarea by rbtree START]-------\n");
-	root = p->mm->mm_rb.rb_node;
-	print_rb_tree(root);
+	root = mm->mm_rb.rb_node;
+    print_vm_rb_tree(root);
+
 	printk("-------[visit vmarea by rbtree   END]-------\n");
 
     return ;
@@ -114,9 +135,11 @@ static int __init printvm_init(void)
 
 static void __exit printvm_exit(void)
 {
-   printk("<1>exit ---------------------!\n");
+   printk(KERN_INFO"printvm exit ---------------------!\n");
 }
 
+
+
 module_init(printvm_init);
 module_exit(printvm_exit);
 MODULE_LICENSE("GPL");

study/kernel/01-process/01-task/print_vmarea/print_vmarea.mod.c

@@ -1,34 +0,0 @@
-#include <linux/module.h>
-#include <linux/vermagic.h>
-#include <linux/compiler.h>
-
-MODULE_INFO(vermagic, VERMAGIC_STRING);
-
-__visible struct module __this_module
-__attribute__((section(".gnu.linkonce.this_module"))) = {
-	.name = KBUILD_MODNAME,
-	.init = init_module,
-#ifdef CONFIG_MODULE_UNLOAD
-	.exit = cleanup_module,
-#endif
-	.arch = MODULE_ARCH_INIT,
-};
-
-static const struct modversion_info ____versions[]
-__used
-__attribute__((section("__versions"))) = {
-	{ 0xcd71858e, __VMLINUX_SYMBOL_STR(module_layout) },
-	{ 0xedf578ce, __VMLINUX_SYMBOL_STR(param_ops_int) },
-	{ 0x41b892fa, __VMLINUX_SYMBOL_STR(pid_task) },
-	{ 0x55d7e3d9, __VMLINUX_SYMBOL_STR(find_vpid) },
-	{ 0x27e1a049, __VMLINUX_SYMBOL_STR(printk) },
-	{ 0xbdfb6dbb, __VMLINUX_SYMBOL_STR(__fentry__) },
-};
-
-static const char __module_depends[]
-__used
-__attribute__((section(".modinfo"))) =
-"depends=";
-
-
-MODULE_INFO(srcversion, "1407329B4F1FA1039D668F7");