Each Process now has a user heap.

It will be used for transferring data from kernel to userland.

6 files changed, 25 insertions, 20 deletions

diff --git a/Source/Kernel/Makefile b/Source/Kernel/Makefile
index b28f487..56754d0 100644
--- a/Source/Kernel/Makefile
+++ b/Source/Kernel/Makefile
@@ -5,7 +5,7 @@ CXX = g++
 LD = ld
 LDFLAGS = -T Link.ld -Map Map.txt --oformat=elf32-i386
 CFLAGS = -nostdlib -nostartfiles -nodefaultlibs -fno-builtin -fno-stack-protector -Wall -Wextra -Werror -I .
-CXXFLAGS = -nostartfiles -nostdlib -fno-exceptions -fno-rtti -I . -Wall -Werror -Wno-write-strings -funsigned-char -D THIS_IS_MELON -D RANDOM_SEED=`date +%N`LL -g
+CXXFLAGS = -nostartfiles -nostdlib -fno-exceptions -fno-rtti -I . -Wall -Werror -Wno-write-strings -funsigned-char -D THIS_IS_MELON -D RANDOM_SEED=1`date +%N`LL
 ASM = nasm
 ASMFLAGS = -f elf
  
diff --git a/Source/Kernel/Melon.ke b/Source/Kernel/Melon.ke
deleted file mode 100755
index 3eb5982..0000000
--- a/Source/Kernel/Melon.ke
+++ /dev/null
diff --git a/Source/Kernel/TaskManager/Process.class.cpp b/Source/Kernel/TaskManager/Process.class.cpp
index 2706986..d7fba80 100644
--- a/Source/Kernel/TaskManager/Process.class.cpp
+++ b/Source/Kernel/TaskManager/Process.class.cpp
@@ -3,6 +3,10 @@
 #include <MemoryManager/PhysMem.ns.h>
 #include <VFS/File.class.h>
 
+namespace Mem {
+	extern Heap kheap;
+}
+
 Process::Process() {	//Private constructor, does nothing
 }
 
@@ -14,7 +18,7 @@ Process* Process::createKernel(String cmdline, VirtualTerminal *vt) {
 	p->m_state = P_RUNNING;
 	p->m_pagedir = kernelPageDirectory;
 	p->m_uid = 0;
-	p->m_stacksstart = 0;
+	p->m_userHeap = &Mem::kheap;
 	p->m_vt = vt;
 	
 	Thread* t = new Thread();
@@ -35,24 +39,19 @@ Process::Process(String cmdline, u32int uid) {
 	m_cmdline = cmdline;
 	m_retval = 0;
 	m_state = P_RUNNING;
-	m_pagedir = new PageDirectory(kernelPageDirectory);
 	m_uid = uid;
 	m_vt = Task::currProcess()->getVirtualTerminal();
-	m_stacksstart = 0xC0000000;
+	//Create page directory and user heap
+	m_pagedir = new PageDirectory(kernelPageDirectory);
+	m_userHeap = new Heap();
+	u32int heapIdxSize = PhysMem::total() * 16 + 0x10000;
+	m_userHeap->create(USERHEAPSTART, USERHEAPINITSIZE + heapIdxSize, heapIdxSize, m_pagedir, true, true);
 }
 
 Process::~Process() {
 	exit();	//Kill all threads
 	delete m_pagedir;
-}
-
-u32int Process::stackAlloc() {
-	if (m_stacksstart < STACKSIZE) return 0;
-	for (u32int i = m_stacksstart - STACKSIZE; i < m_stacksstart; i += 0x1000) {
-		m_pagedir->allocFrame(i & 0xFFFFF000, true, true);
-	}
-	m_stacksstart -= STACKSIZE;
-	return m_stacksstart;
+	delete m_userHeap;
 }
 
 void Process::exit() {
diff --git a/Source/Kernel/TaskManager/Process.class.h b/Source/Kernel/TaskManager/Process.class.h
index b975db1..ac9614e 100644
--- a/Source/Kernel/TaskManager/Process.class.h
+++ b/Source/Kernel/TaskManager/Process.class.h
@@ -5,6 +5,7 @@
 #include <Library/Vector.class.h>
 #include <Library/SimpleList.class.h>
 #include <MemoryManager/PageDirectory.class.h>
+#include <MemoryManager/Heap.class.h>
 #include <VTManager/VirtualTerminal.proto.h>
 
 #define P_ZOMBIE 0
@@ -15,7 +16,10 @@
 #define E_ABORTED 0x0FFFFF01
 #define E_UNHANDLED_EXCEPTION 0x0FFFFF02
 
-#define STACKSIZE 4096	//Can change
+#define STACKSIZE 4096	//Could change
+
+#define USERHEAPINITSIZE 0x00010000	//Heap initially is 64k, but can grow
+#define USERHEAPSTART 0xB7000000	//Heap is at 0xB7000000, 128Mo before kernel space.
 
 class Thread;
 class File;
@@ -32,9 +36,10 @@ class Process {
 	u8int m_state; 	//Is one of P_* defined above
 	PageDirectory* m_pagedir;
 	u32int m_uid;	//User ID
-	u32int m_stacksstart;
 	VirtualTerminal *m_vt;
 
+	Heap *m_userHeap;
+
 	Vector<Thread*> m_threads;
 	SimpleList<File*> *m_fileDescriptors;
 	
@@ -43,8 +48,9 @@ class Process {
 	Process(String cmdline, u32int uid);
 	~Process();
 
-	u32int stackAlloc();	//Allocates pages for STACKSIZE bytes at end of app memory (just before 0xC0000000)
-	void exit();	//Exits properly process by killing all threads
+	Heap& heap() { return *m_userHeap; }
+
+	void exit();	//Exits properly process by killing all threads and deleting file descriptors
 	void registerThread(Thread* t);	//Called when a thread starts
 	void threadFinishes(Thread* thread, u32int retval); //Called when a thread finishes
 
diff --git a/Source/Kernel/TaskManager/Task.ns.cpp b/Source/Kernel/TaskManager/Task.ns.cpp
index 66eca94..a34f14f 100644
--- a/Source/Kernel/TaskManager/Task.ns.cpp
+++ b/Source/Kernel/TaskManager/Task.ns.cpp
@@ -3,7 +3,7 @@
 #include <MemoryManager/PhysMem.ns.h>
 
 #define INVALID_TASK_MAGIC 0xBEEFFEED
-#define TEMP_STACK_SIZE 128 //This must be big enough so that we can call all we need to call when a task finishes
+#define TEMP_STACK_SIZE 256 //This must be big enough so that we can call all we need to call when a task finishes
 
 //From Task.wtf.asm
 extern "C" u32int read_eip();
diff --git a/Source/Kernel/TaskManager/Thread.class.cpp b/Source/Kernel/TaskManager/Thread.class.cpp
index fe1d08e..20d6cd4 100644
--- a/Source/Kernel/TaskManager/Thread.class.cpp
+++ b/Source/Kernel/TaskManager/Thread.class.cpp
@@ -22,14 +22,14 @@ Thread::Thread(thread_entry_t entry_point, void* data, bool iskernel) {
 	} else {
 		m_isKernel = false;
 		m_process = Task::currProcess();
-		setup(entry_point,  data, m_process->stackAlloc() + STACKSIZE);
+		setup(entry_point,  data, (u32int)(m_process->heap().alloc(STACKSIZE)) + STACKSIZE);
 	}
 }
 
 Thread::Thread(Process* process, thread_entry_t entry_point, void* data) {
 	m_isKernel = false;
 	m_process = process;
-	setup(entry_point, data, m_process->stackAlloc() + STACKSIZE);
+	setup(entry_point, data, (u32int)(m_process->heap().alloc(STACKSIZE)) + STACKSIZE);
 }
 
 Thread::~Thread() {