use libbozo

Makefile

@@ -1,10 +1,10 @@
 AS := i386-elf-as
 ASFLAGS := 
 CC := i386-elf-gcc
-CCFLAGS := -std=gnu99 -ffreestanding -O2 -Wall -Wextra
+CCFLAGS := -std=gnu99 -ffreestanding -O2 -Wall -Wextra -iquotelibbozo/headers
 LD := $(CC)
 LDFLAGS := -T boot/linker.ld -ffreestanding -O2 -nostdlib
-LIBS := -lgcc
+LIBS := ./libbozo/build/libbozo.a -lgcc
 
 SSRC := $(wildcard src/*.s)
 CSRC := $(wildcard src/*.c)
@@ -16,14 +16,15 @@ NAME := bozOS
 all: $(NAME)
 
 obj/%.o: src/%.s
-	mkdir -p obj/
+	mkdir -p $(dir $@)
 	$(AS) $(ASFLAGS) $< -o $@
 
 obj/%.o: src/%.c
-	mkdir -p obj/
+	mkdir -p $(dir $@)
 	$(CC) $(CCFLAGS) -c $< -o $@
 
 $(NAME): $(OBJ)
+	make -C libbozo
 	mkdir -p build/
 	$(LD) $(LDFLAGS) -o build/$(NAME).bin $(OBJ) $(LIBS)
 
@@ -31,9 +32,11 @@ run: $(NAME)
 	qemu-system-i386 -kernel build/$(NAME).bin
 
 clean:
+	make -C libbozo clean
 	rm -rf obj/
 
 fclean: clean
+	make -C libbozo fclean
 	rm -rf build/
 
 re: fclean all

libbozo

@@ -1 +1 @@
-Subproject commit a495e0dc2cfa01d89c257b1aabfc8f9e31aea843
+Subproject commit 6fe18b35722c0cf2cfd7bbaf7233b5ae66d3babf

src/kernel.c

@@ -1,3 +1,6 @@
+#include "terminal.h"
+#include "kprintf.h"
+
 #include <stdbool.h>
 #include <stddef.h>
 #include <stdint.h>
@@ -13,91 +16,10 @@
 #error "This tutorial needs to be compiled with a ix86-elf compiler"
 #endif
 
-/* Hardware text mode color constants. */
-enum vga_color {
-  VGA_COLOR_BLACK = 0,
-  VGA_COLOR_BLUE = 1,
-  VGA_COLOR_GREEN = 2,
-  VGA_COLOR_CYAN = 3,
-  VGA_COLOR_RED = 4,
-  VGA_COLOR_MAGENTA = 5,
-  VGA_COLOR_BROWN = 6,
-  VGA_COLOR_LIGHT_GREY = 7,
-  VGA_COLOR_DARK_GREY = 8,
-  VGA_COLOR_LIGHT_BLUE = 9,
-  VGA_COLOR_LIGHT_GREEN = 10,
-  VGA_COLOR_LIGHT_CYAN = 11,
-  VGA_COLOR_LIGHT_RED = 12,
-  VGA_COLOR_LIGHT_MAGENTA = 13,
-  VGA_COLOR_LIGHT_BROWN = 14,
-  VGA_COLOR_WHITE = 15,
-};
-
-static inline uint8_t vga_entry_color(enum vga_color fg, enum vga_color bg) {
-  return fg | bg << 4;
-}
-
-static inline uint16_t vga_entry(unsigned char uc, uint8_t color) {
-  return (uint16_t)uc | (uint16_t)color << 8;
-}
-
-size_t strlen(const char *str) {
-  size_t len = 0;
-  while (str[len])
-    len++;
-  return len;
-}
-
-static const size_t VGA_WIDTH = 80;
-static const size_t VGA_HEIGHT = 25;
-
-size_t terminal_row;
-size_t terminal_column;
-uint8_t terminal_color;
-uint16_t *terminal_buffer;
-
-void terminal_initialize(void) {
-  terminal_row = 0;
-  terminal_column = 0;
-  terminal_color = vga_entry_color(VGA_COLOR_LIGHT_GREY, VGA_COLOR_BLACK);
-  terminal_buffer = (uint16_t *)0xB8000;
-  for (size_t y = 0; y < VGA_HEIGHT; y++) {
-    for (size_t x = 0; x < VGA_WIDTH; x++) {
-      const size_t index = y * VGA_WIDTH + x;
-      terminal_buffer[index] = vga_entry(' ', terminal_color);
-    }
-  }
-}
-
-void terminal_setcolor(uint8_t color) { terminal_color = color; }
-
-void terminal_putentryat(char c, uint8_t color, size_t x, size_t y) {
-  const size_t index = y * VGA_WIDTH + x;
-  terminal_buffer[index] = vga_entry(c, color);
-}
-
-void terminal_putchar(char c) {
-  terminal_putentryat(c, terminal_color, terminal_column, terminal_row);
-  if (++terminal_column == VGA_WIDTH) {
-    terminal_column = 0;
-    if (++terminal_row == VGA_HEIGHT)
-      terminal_row = 0;
-  }
-}
-
-void terminal_write(const char *data, size_t size) {
-  for (size_t i = 0; i < size; i++)
-    terminal_putchar(data[i]);
-}
-
-void terminal_writestring(const char *data) {
-  terminal_write(data, strlen(data));
-}
-
 void kernel_main(void) {
   /* Initialize terminal interface */
   terminal_initialize();
 
   /* Newline support is left as an exercise. */
-  terminal_writestring("Hello, kernel World!\n");
+  kprintf(0, "test%c", 'c');
 }