New directory structure

Makefile

@@ -0,0 +1,52 @@
+
+EMULATOR = qemu-system-i386
+AS = ${HOME}/opt/cross/bin/i686-elf-as
+CC = ${HOME}/opt/cross/bin/i686-elf-gcc
+CFLAGS = -std=gnu99 -ffreestanding -O2 -Wall -Wextra
+
+OFILES =	$(BUILD_DIR)/boot.o $(BUILD_DIR)/kterm.o $(BUILD_DIR)/kernel.o 
+
+SRC_DIR = src
+BUILD_DIR = build
+
+CRTBEGIN_OBJ = $(shell $(CC) $(CFLAGS) -print-file-name=crtbegin.o)
+CRTEND_OBJ = $(shell $(CC) $(CFLAGS) -print-file-name=crtend.o)
+
+CRTI_OBJ = $(BUILD_DIR)/crti.o
+CRTN_OBJ = $(BUILD_DIR)/crtn.o
+OBJ_LINK_LIST = $(CRTI_OBJ) $(CRTBEGIN_OBJ) $(OFILES) $(CRTEND_OBJ) $(CRTN_OBJ)  
+INTERNAL_OBJS = $(CRTI_OBJ) $(OFILES) $(CRTN_OBJ)
+
+
+all: clean build
+
+build: build_kernel run 
+
+run:
+	$(EMULATOR) -kernel $(BUILD_DIR)/myos.bin 
+build_kernel: $(OBJ_LINK_LIST)
+	
+	$(CC) -T $(SRC_DIR)/kernel/arch/i386/linker.ld -o $(BUILD_DIR)/myos.bin \
+	 -ffreestanding -O2 -nostdlib $(OBJ_LINK_LIST) -lgcc
+
+build_x86_64: 
+	$(AS) $(SRC_DIR)/cgc/x86_64/crti.s -o $(BUILD_DIR)/crti_64.o
+	$(AS) $(SRC_DIR)/cgc/x86_64/crtn.s -o $(BUILD_DIR)/crtn.o
+
+clean: 
+	rm -f $(BUILD_DIR)/myos.bin $(INTERNAL_OBJS)
+
+$(BUILD_DIR)/kernel.o:
+	$(CC) -c $(SRC_DIR)/kernel/kernel.c  -o $(BUILD_DIR)/kernel.o $(CFLAGS)
+
+$(BUILD_DIR)/kterm.o:
+	$(CC) -c $(SRC_DIR)/kernel/arch/i386/tty/kterm.c  -o $(BUILD_DIR)/kterm.o $(CFLAGS)
+
+$(BUILD_DIR)/boot.o:
+	$(AS) $(SRC_DIR)/kernel/arch/i386/boot.s -o $(BUILD_DIR)/boot.o
+
+$(BUILD_DIR)/crti.o:
+	$(AS) $(SRC_DIR)/kernel/arch/i386/crti.s -o $(BUILD_DIR)/crti.o
+
+$(BUILD_DIR)/crtn.o:
+	$(AS) $(SRC_DIR)/kernel/arch/i386/crtn.s -o $(BUILD_DIR)/crtn.o

src/kernel/arch/i386/boot.s

@@ -32,7 +32,9 @@ _start:
  
 
 
+	call _init
 	call kernel_main
+ 
 
 	cli
 1:	hlt

src/kernel/arch/i386/crti.s

@@ -0,0 +1,14 @@
+.section .init
+.global _init
+.type _init, @function
+_init:
+	push %ebp
+	movl %esp, %ebp
+	/* gcc will nicely put the contents of crtbegin.o's .init section here. */
+
+.section .fini
+.global _fini
+.type _fini, @function
+_fini:
+	push %ebp
+	movl %esp, %ebp

src/kernel/arch/i386/crtn.s

@@ -0,0 +1,7 @@
+.section .init
+	popl %ebp
+	ret
+
+.section .fini
+	popl %ebp
+	ret

src/kernel/arch/i386/tty/kterm.c

@@ -1,39 +1,14 @@
-#include "kernel.h"
 #include "kterm.h"
+static const size_t VGA_WIDTH = 80;
+static const size_t VGA_HEIGHT = 25;
+
+size_t kterm_row;
+size_t kterm_column;
+uint8_t kterm_color;
+uint16_t* kterm_buffer;
 
 
-/**
+static inline uint8_t vga_entry_color( enum vga_color fg, enum vga_color bg) {
- *      simple delay function 
- **/
-void delay(int t){
-    volatile int i,j;
-    for(i=0;i<t;i++)
-        for(j=0;j<25000;j++)
-            asm("NOP");
-}
-
-void kernel_main (void) {
-    /** initialize terminal interface */ 
-    kterm_init();
-
-    /** Wrtite stuff to the screen to test the terminal**/ 
-    kterm_writestring("Hello world!\n");
-    kterm_writestring("We got newline support!\n");
-
-    for(;;){
-        delay(500);
-        kterm_writestring("We have implemented terminal scrolling!\n");
-    }
-   
-   
-}   
-
-
-/**
- * KTerm stuff 
- **/
-
-static inline uint8_t vga_entry_color(enum vga_color fg, enum vga_color bg) {
     return fg | bg << 4;
 }
 
@@ -110,7 +85,6 @@ void kterm_write(const char* data, size_t size) {
     }
 }   
 
-
 void kterm_writestring(const char* data ){
     AS_KERNEL();
     kterm_write(data, strlen(data));

src/kernel/arch/i386/tty/kterm.h

@@ -1,13 +1,9 @@
-#include <stdbool.h>
+#pragma once 
+#include <stdint.h>
 #include <stddef.h>
 #include <stdint.h>
-
+#include <stdbool.h>
-#include "string.h"
+#include "../vga/colors.h"
-
-#define KernelTag "[Kernel]: "
-#define AS_KERNEL() (  kterm_setcolor(VGA_COLOR_LIGHT_BLUE),\
-                       kterm_write(KernelTag, strlen(KernelTag)), \
-                       kterm_resetcolor())
 
 void kterm_init();
 
@@ -20,5 +16,7 @@ void kterm_write(const char*, size_t);
 void kterm_writestring(const char*);
 void kterm_scrollup();
 
-
+#define KernelTag "[Kernel]: "
-
+#define AS_KERNEL() (  kterm_setcolor(VGA_COLOR_LIGHT_BLUE),\
+                       kterm_write(KernelTag, 10 ), \
+                       kterm_resetcolor())

src/kernel/arch/i386/vga/colors.h

@@ -1,3 +1,4 @@
+#pragma once 
 enum vga_color {
 	VGA_COLOR_BLACK = 0,
 	VGA_COLOR_BLUE = 1,

src/kernel/kernel.c

@@ -0,0 +1,27 @@
+#include "kernel.h"
+/**
+ *      simple delay function 
+ **/
+void delay(int t){
+    volatile int i,j;
+    for(i=0;i<t;i++)
+        for(j=0;j<25000;j++)
+            asm("NOP");
+}
+
+void kernel_main (void) {
+    /** initialize terminal interface */ 
+    kterm_init();
+
+    /** Wrtite stuff to the screen to test the terminal**/ 
+    kterm_writestring("Hello world!\n");
+    kterm_writestring("We got newline support!\n");
+
+    for(;;){
+        delay(500);
+        kterm_writestring("We have implemented terminal scrolling!\n");
+    }
+   
+   
+}   
+

src/kernel/kernel.h

@@ -0,0 +1,3 @@
+#pragma once 
+#include "../libc/include/string.h"
+#include "arch/i386/tty/kterm.h"

src/kterm.h

@@ -1,11 +0,0 @@
-#include <stdint.h>
-#include <stddef.h>
-#include "vga_colors.h"
-
-static const size_t VGA_WIDTH = 80;
-static const size_t VGA_HEIGHT = 25;
-
-size_t kterm_row;
-size_t kterm_column;
-uint8_t kterm_color;
-uint16_t* kterm_buffer;