Load the C++ kernel directly after the micro kernel

Makefile

@@ -8,9 +8,10 @@ bootloader.bin: src/bootloader/bootloader.asm
 
 micro_kernel.bin: $(KERNEL_SRC) $(KERNEL_UTILS_SRC)
 	nasm -w+all -f bin -o micro_kernel.bin src/micro_kernel.asm
+	nasm -D DEBUG -g -w+all -f elf64 -o micro_kernel.g src/micro_kernel.asm
 
 kernel.o: src/kernel.cpp
-	g++ -O2 -std=c++11 -Wall -Wextra -fno-exceptions -fno-rtti -ffreestanding -c src/kernel.cpp -o kernel.o
+	g++ -masm=intel -O2 -std=c++11 -Wall -Wextra -fno-exceptions -fno-rtti -ffreestanding -c src/kernel.cpp -o kernel.o
 
 kernel.bin: kernel.o
 	g++ -std=c++11 -T linker.ld -o kernel.bin.o -ffreestanding -O2 -nostdlib kernel.o

addresses.bash

@@ -0,0 +1,16 @@
+#!/bin/bash
+
+function generate_address {
+    address=`readelf --symbols micro_kernel.g | grep $1 | xargs | cut -d ' ' -f 2`
+    hex_address="0x$address"
+    hex_offset=`echo "obase=16; $(($hex_address+0x1000))" | bc`
+
+    echo "#define asm_$1 0x$hex_offset" >> src/addresses.hpp
+}
+
+echo "#ifndef ADDRESSES_H" > src/addresses.hpp
+echo "#define ADDRESSES_H" >> src/addresses.hpp
+
+generate_address "register_irq_handler"
+
+echo "#endif" >> src/addresses.hpp

fill.bash

@@ -1,5 +1,5 @@
 #!/bin/bash
 
 size=`stat -c%s kernel.bin`
-let filler_size=512-$size
+let filler_size=1024-$size
 dd if=/dev/zero of=filler.bin bs=1 count=$filler_size

src/addresses.hpp

@@ -0,0 +1,4 @@
+#ifndef ADDRESSES_H
+#define ADDRESSES_H
+#define asm_register_irq_handler 0x272E
+#endif

src/bootloader/bootloader.asm

@@ -64,7 +64,7 @@ rm_start:
     ; Loading the assembly kernel from floppy
 
     ASM_KERNEL_BASE equ 0x100       ; 0x0100:0x0 = 0x1000
-    asm_sectors equ 0x21            ; sectors to read
+    asm_sectors equ 0x22            ; sectors to read
     bootdev equ 0x0
 
     mov ax, ASM_KERNEL_BASE

src/commands.asm

@@ -573,9 +573,7 @@ load_command:
 
     call 0x5000
 
-    jmp $
-
-    call clear_command
+    ;jmp $
 
     ret
 

src/kernel.cpp

@@ -1,18 +1,45 @@
 void k_print_line(const char* string);
 void k_print(const char* string);
 
+#include "addresses.hpp"
+
+typedef unsigned int uint8_t __attribute__((__mode__(__QI__)));
+typedef unsigned int uint16_t __attribute__ ((__mode__ (__HI__)));
+
+uint8_t in_byte(uint16_t _port){
+    uint8_t rv;
+    __asm__ __volatile__ ("in %0, %1" : "=a" (rv) : "dN" (_port));
+    return rv;
+}
+
+void out_byte (uint16_t _port, uint8_t _data){
+    __asm__ __volatile__ ("out %0, %1" : : "dN" (_port), "a" (_data));
+}
+
+void __attribute__((naked)) keyboard_handler(){
+    in_byte(0x60);
+
+    k_print("key");
+}
+
+long current_line = 0;
+long current_column = 0;
+
 extern "C"
 void  __attribute__ ((section ("main_section"))) kernel_main(){
     k_print("thor> ");
 
-    //TODO Register keyword handler
+    asm ("mov r8, 1; mov r9, %0; call %1"
+        :
+        : "i" (&keyboard_handler), "i" (asm_register_irq_handler)
+        : "r8", "r9"
+        );
+
+    //while(true);
 
     return;
 }
 
-typedef unsigned int uint8_t __attribute__((__mode__(__QI__)));
-typedef unsigned int uint16_t __attribute__ ((__mode__ (__HI__)));
-
 enum vga_color {
     BLACK = 0,
     BLUE = 1,
@@ -32,9 +59,6 @@ enum vga_color {
     WHITE = 15,
 };
 
-long current_line = 0;
-long current_column = 0;
-
 uint8_t make_color(vga_color fg, vga_color bg){
     return fg | bg << 4;
 }

src/micro_kernel.asm

@@ -1,5 +1,8 @@
 [BITS 16]
+
+%ifndef DEBUG
 [ORG 0x1000]
+%endif
 
 jmp _start
 
@@ -98,11 +101,13 @@ lm_start:
 
     call install_timer
 
-    ; Enter the shell
-    call shell_start
+    call 0x5000
 
     jmp $
 
+    ; Enter the shell
+    ;call shell_start
+
 ; Includes
 
 %include "src/utils/macros.asm"