refactor(kernel): new calling conventions in klog

kernel/kernel.asm

@@ -39,9 +39,9 @@ kmain:
 	mov [0xC00B8008], dword 0x03640469
 	mov [0xC00B800C], dword 0x0153024F
 
-	mov esi, szMsgKernelAlive
+	mov eax, szMsgKernelAlive
 	call klog
-	mov esi, szMsgBuildDate
+	mov eax, szMsgBuildDate
 	call klog
 
 	call mm_bootstrap
@@ -118,7 +118,7 @@ kmain:
 	call klog
 	jmp .halt
 
-	include 'klog.inc'
+	include 'klog.new.inc'
 	include 'dev/console.inc'
 	include 'dev/dev.inc'
 	include 'mm/bootstrap.inc'

kernel/klog.new.inc

@@ -0,0 +1,292 @@
+	;; File: klog.inc
+	;; Kernel logging utilities
+	;;
+
+COM1 = 0x3F8
+
+	;; Function: _klog_print
+	;;
+	;; In: EAX - Null-terminated string to print
+_klog_print_str:
+	push ebp
+	mov ebp, esp
+	
+	push esi
+	mov dx, COM1
+	mov esi, eax
+@@:
+	lodsb
+	or al, al
+	jz @f
+	out dx, al
+
+	pusha
+	call cga_putc
+	popa
+	
+	jmp @b
+@@:
+	pop esi
+	leave
+	ret
+
+	;; Function: _klog_print_int
+	;;
+	;; In:
+	;;    EAX - number
+_klog_print_int:
+	test eax, eax
+	js .print_minus
+.print_minus:
+	ret
+
+	;; Function: _klog_print_unsigned
+	;;
+	;; In:
+	;;     EAX - number
+_klog_print_unsigned:
+	push ebx
+	mov ebx, 10
+	xor ecx, ecx
+@@:
+	xor edx, edx
+	div ebx
+	push edx
+	inc ecx
+	or eax, eax
+	jnz @b
+
+@@:
+	pop eax
+	add al, 0
+	mov dx, COM1
+	out dx, al
+	pusha
+	call cga_putc
+	popa
+
+	dec ecx
+	or cl, cl
+	jnz @b
+
+	pop ebx
+	
+	ret
+
+	;; Function: _klog_print_hex
+	;;
+	;; In:
+	;;    EAX - number
+_klog_print_hex:
+	push ebp
+	mov ebp, esp
+
+	push edi
+	mov edi, eax
+	
+	mov eax, szHexPrefix
+	call _klog_print_str
+
+	or edi, edi
+	jz .print_zero
+
+	xor cl, cl
+.begin:
+	cmp cl, 8
+	je .print_number
+	rol edi, 4
+	mov eax, edi
+	and eax, 0xF
+	mov al, byte [sDigit + eax]
+	mov [szKlogBuffer + ecx], al
+	inc cl
+	jmp .begin
+
+.print_zero:
+	mov al, '0'
+	mov dx, COM1
+	out dx, al
+	pusha
+	call cga_putc
+	popa
+	jmp .end
+
+.print_number:
+	mov [szKlogBuffer + ecx], byte 0
+	mov eax, szKlogBuffer
+	call _klog_print_str
+	
+.end:	
+	pop edi
+	leave
+	ret
+	
+	;; Function: _klog_print_time
+	;; 
+_klog_print_time:
+	; wait CMOS ready
+@@:
+	mov al, 0x0A
+	out CMOS_COMMAND, al
+	in al, CMOS_DATA
+	and al, 0x80
+	jnz @b
+
+	mov al, CMOS_REG_HOUR
+	out CMOS_COMMAND, al
+	in al, CMOS_DATA
+
+	mov ah, al
+	shr ah, 4
+	and ah, 0xF
+	and al, 0xF
+
+	add ah, 0x30
+	add al, 0x30
+	mov [szTime + 1], ah
+	mov [szTime + 2], al
+
+	mov al, CMOS_REG_MINUTE
+	out CMOS_COMMAND, al
+	in al, CMOS_DATA
+
+	mov ah, al
+	shr ah, 4
+	and ah, 0xF
+	and al, 0xF
+
+	add ah, 0x30
+	add al, 0x30
+	mov [szTime + 4], ah
+	mov [szTime + 5], al
+
+	mov al, CMOS_REG_SECOND
+	out CMOS_COMMAND, al
+	in al, CMOS_DATA
+
+	mov ah, al
+	shr ah, 4
+	and ah, 0xF
+	and al, 0xF
+
+	add ah, 0x30
+	add al, 0x30
+	mov [szTime + 7], ah
+	mov [szTime + 8], al
+
+	mov eax, szTime
+	call _klog_print_str
+
+	ret
+
+	;; Function: klog
+	;; 
+	;; Output kernel log
+	;;
+	;; In:
+	;;    EAX      - null-terminated string
+	;;    STACK[X] - var_arg
+klog:
+	push ebp
+	mov ebp, esp
+
+	push esi
+	mov esi, eax
+	
+	; display log time
+	call _klog_print_time
+
+	mov ecx, 4
+.begin:
+	mov al, [esi]
+	or al, al
+	jz .end
+	; search for formating
+	cmp al, '%'
+	jne .putchar
+	; read next char
+	inc esi
+	mov al, [esi]
+
+	; check if another '%'
+	cmp al, '%'
+	je .putchar
+	
+	;  check if string format
+	cmp al, 's'
+	jne @f
+	; print string
+	mov eax, [ebp + ecx]
+	push ecx
+	call _klog_print_str
+	pop ecx
+	add ecx, 4
+	
+	jmp .next
+
+	; check if hex format
+@@:
+	cmp al, 'x'
+	jne @f
+
+	mov eax, [ebp + ecx]
+	push ecx
+	call _klog_print_hex
+	pop ecx
+	add ecx, 4
+
+	jmp .next
+
+	; check if int format
+@@:
+	cmp al, 'd'
+	jne @f
+
+	mov eax, [ebp + ecx]
+	push ecx
+	call _klog_print_int
+	pop ecx
+	add ecx, 4
+
+	jmp .next
+
+	; check if unsigned
+@@: 
+	cmp al, 'u'
+	jne @f
+
+	mov eax, [ebp + ecx]
+	push ecx
+	call _klog_print_unsigned
+	pop ecx
+	add ecx, 4
+
+	jmp .next
+	
+	; unknown format
+@@:
+	mov al, '?'
+
+.putchar: 			; XXX: fix this mess
+	mov dx, COM1
+	out dx, al
+	pusha
+	call cga_putc
+	popa
+
+.next:
+	inc esi
+	jmp .begin
+
+.end:
+	mov eax, szCRLF
+	call _klog_print_str
+
+	leave
+	ret
+
+szTime       db '[00:00:00] ', 0
+szCRLF	     db CR, LF, 0
+sDigit       db '0123456789ABCDEF'
+szHexPrefix  db '0x', 0	
+szKlogBuffer db '00000000', 0

kernel/mm/bootstrap.inc

@@ -5,7 +5,7 @@
 	;; Setup recursive paging.
 	;; map page dir at 0xFFFFF000
 mm_bootstrap:
-	mov esi, szMsgMmBootstrap
+	mov eax, szMsgMmBootstrap
 	call klog
 	; 0x400000
 	; PDE entry: 0x7ffc00 phys addr and curr virt addr: 0xc07ffc00