Overhaul of interrupts, now actually captures useful info.

src/idt.c

@@ -5,11 +5,14 @@
 #pragma GCC push_options
 #pragma GCC optimize ("0")
 
+#define serial_val(i) itoa(i,f);serial_writestring(f);serial_writestring(" ");
 uint16_t idt_limit;
 uint32_t idt_base;
 
 idt_desc _idt [MAX_IDT_INT];
 
+uint16_t _code_sel;
+
 void idt_install() 
 {
     struct
@@ -22,10 +25,16 @@ void idt_install()
     asm volatile ("lidt (%0)": :"r"(&idtr));
 }
 
-static void default_handler() 
+void default_handler(struct reg_state reg, uint32_t interrupt, uint32_t error, struct stack_state stack) 
 {
-    //DEBUG OUTPUT MAYBE?
-    serial_writestring("int caught\n");
+    serial_writestring("int caught ");
+    char f[20];
+    serial_val(interrupt);
+    serial_val(error);
+    serial_val(stack.eip);
+    serial_val(stack.cd);
+    serial_val(stack.eflags);
+    serial_writestring("\n");
     return;
 }
 
@@ -57,16 +66,23 @@ int install_ir(uint32_t i, uint16_t flags, uint16_t code_sel, IRQ_HANDLER irq)
     return 0;
 }
 
+void idt_ftoi(int a, IRQ_HANDLER irq)
+{
+    install_ir(a, IDT_PR|IDT_32, _code_sel, irq);
+}
+
 int idt_init(uint16_t code_sel) 
 {
     idt_limit = sizeof(idt_desc) * MAX_IDT_INT -1;
     idt_base  = (uint32_t)&_idt[0];
     memset ((void*)&_idt[0], 0, sizeof (idt_desc) * MAX_IDT_INT-1);
-    for (int i=0; i<MAX_IDT_INT; i++)
-    {
-	    install_ir (i, IDT_PR|IDT_32, code_sel, (IRQ_HANDLER)default_handler);
-    }
+    //for (int i=0; i<MAX_IDT_INT; i++)
+    //{
+    //	install_ir (i, IDT_PR|IDT_32, code_sel, (IRQ_HANDLER)default_handler);
+    //}
+    _code_sel = code_sel;
+    idtsetup();
     idt_install();
     return 0;
 }
-#pragma GCC pop_options
\ No newline at end of file
+#pragma GCC pop_options

src/idt.h

@@ -23,8 +23,31 @@ typedef struct
     uint16_t high_base;
 }__attribute__((packed)) idt_desc;
 
+
+struct reg_state
+{
+    uint32_t eax;
+    uint32_t ecx;
+    uint32_t edx;
+    uint32_t ebx;
+    uint32_t ebp;
+    uint32_t esi;
+    uint32_t edi;
+    uint32_t esp;
+}__attribute__((packed));
+
+struct stack_state
+{
+    uint32_t eip;
+    uint32_t cd;
+    uint32_t eflags;
+}__attribute__((packed));
+
+
+extern void default_handler(struct reg_state reg,uint32_t interrupt, uint32_t error, struct stack_state stack); 
 extern idt_desc* get_ir(uint32_t i);
 extern int install_ir(uint32_t i, uint16_t flags, uint16_t code_sel, IRQ_HANDLER);
 extern int idt_init(uint16_t code_sel);
-
+extern void idt_ftoi(int a, IRQ_HANDLER irq);
+extern void idtsetup();
 #endif

src/idta.asm

+extern default_handler
+extern idt_ftoi
+	
+%macro error_interrupt 1
+global interrupt_handler_%1
+interrupt_handler_%1:
+	push 	dword %1
+	jmp 	common_handler
+%endmacro
+
+%macro regular_interrupt 1
+global interrupt_handler_%1
+interrupt_handler_%1:
+	push 	dword 0
+	push 	dword %1
+	jmp 	common_handler
+%endmacro
+
+common_handler:
+	pusha
+	call default_handler
+	popa
+	add	esp, 8
+	iret
+
+regular_interrupt 0
+regular_interrupt 1	
+regular_interrupt 2
+regular_interrupt 3
+regular_interrupt 4
+regular_interrupt 5
+regular_interrupt 6
+regular_interrupt 7
+error_interrupt 8
+regular_interrupt 9
+error_interrupt 10
+error_interrupt 11
+error_interrupt 12
+error_interrupt 13
+error_interrupt 14
+regular_interrupt 15
+regular_interrupt 16
+error_interrupt 17
+%assign i 18
+%rep 12
+	regular_interrupt i
+%assign i i+1
+%endrep
+error_interrupt 30
+%assign i 31
+%rep 225
+	regular_interrupt i
+%assign i i+1
+%endrep
+
+	global idtsetup
+idtsetup:
+	%assign i 0
+	%rep 256
+		push interrupt_handler_%[i]
+		push i
+		call idt_ftoi
+		add esp, 8
+	%assign i i+1
+	%endrep
+	ret

src/makefile

@@ -3,6 +3,7 @@ C=i686-elf-gcc
 all:
 	/usr/bin/nasm -felf32 head.asm -o boot.o
 	/usr/bin/nasm -felf32 paging.asm
+	/usr/bin/nasm -felf32 idta.asm
 	$C *.c -std=gnu99 -ffreestanding -O2 -Wall -Wextra -c
 	$C -T linker.ld -o myos.bin -ffreestanding -O2 -nostdlib *.o -lgcc
 

src/string.c

@@ -7,6 +7,18 @@ void *memset(void *s, int c, size_t n){
     return s;
 }
 
+void reverse ( char s[] )
+{
+    int c, i, j;
+    
+    for (i=0, j= strlen(s)-1;i<j;i++,j--)
+    {
+	c = s[i];
+	s[i] = s[j];
+	s[j] = c;
+    }
+}
+
 void itoa(int n, char s[])
 {
      int i, sign;
@@ -25,9 +37,10 @@ void itoa(int n, char s[])
          s[i++] = '-';
      }
      s[i] = '\0';
-     //reverse(s);
+     reverse(s);
 }
 
+
 size_t strlen(const char* str) 
 {
     size_t ret = 0;