hello_slices

code/asm/hello_nasm.asm

@@ -9,7 +9,7 @@ extern WriteConsoleA
 ; Data section
 section .data
     message db "Hello, NASM!", 13, 10, 0  ; String with CRLF and null terminator
-    message_len equ $ - message                 ; Calculate string length
+    message_len equ $ - message	                 ; Calculate string length
 
 ; Code section
 section .text

code/asm/hello_slices.asm

@@ -0,0 +1,81 @@
+; Hello Slices!
+
+%define marg
+
+%define rcounter_32 ecx
+
+%define reg8_32         r8d
+
+%define raccumulator    rax
+%define rcounter        rcx
+%define rdata           rdx
+%define rstack_ptr      rsp
+%define rstack_base_ptr rbp
+
+%define reg9 r9
+
+%define MS_STD_OUTPUT_HANDLE 11
+
+struc Slice_Byte
+	.ptr: resq 1
+	.len: resq 1
+endstruc
+
+struc Slice_Str8
+	.ptr: resq 1
+	.len: resq 1
+endstruc
+
+; Usage: lit %1: <slice_label> %2: <utf-8 literal>
+%macro lit 2
+	lit_ %+ %1: db %2
+	lit_ %+ %1 %+ _len: equ $ - (lit_ %+ %1)
+%endmacro
+
+BITS 64     ; Explicitly specify 64-bit mode
+DEFAULT REL ; Use RIP-relative addressing by default
+
+; kernel32.lib
+extern GetStdHandle
+extern WriteConsoleA
+
+section .data
+	std_out_hndl dq 0
+
+section .lits progbits noexec nowrite
+	lit hello_msg, `Hello Slices\n`
+
+section .text
+global main
+
+%define wapi_shadow_width 48
+%macro wapi_shadow_space 0
+	push rstack_base_ptr
+	mov  rstack_base_ptr, rstack_ptr
+	sub  rstack_ptr,      wapi_shadow_width
+%endmacro
+%define wapi_arg4_offset 28
+%define wapi_arg5_offset 32
+
+%define wapi_write_console_written_chars reg9
+%macro wapi_write_console 2
+		mov rcounter,[%1]        ; Console Handle
+		lea rdata,   [%2]        ; Slice_Str8.Ptr
+		mov reg8_32,  %2 %+ _len ; Slice_Str8.Len
+		lea reg9, [rstack_ptr + wapi_arg4_offset]    ; Written chars
+		mov qword [rstack_ptr + wapi_arg5_offset], 0 ; Reserved (must be 0)
+	call WriteConsoleA
+%endmacro
+
+main:
+	wapi_shadow_space
+
+; Setup stdout handle
+	mov rcounter_32, -MS_STD_OUTPUT_HANDLE
+	call GetStdHandle
+	mov [std_out_hndl], raccumulator
+
+	wapi_write_console std_out_hndl, lit_hello_msg
+
+	leave
+	ret