Working hello world with fasm2

2024-11-25 00:05:27 -05:00
parent dceb330571
commit 03b272d91e
6 changed files with 238 additions and 0 deletions
--- a/source/hello.asm
+++ b/source/hello.asm
@ -0,0 +1,38 @@
+include 'fasm2.inc'
+
+format PE64 console
+entry main
+
+section '.data' data readable writeable
+	message       db 'Hello World!', 13, 10
+	message_len = $ - message
+	written       dq ?
+
+section '.text' code readable executable
+main:
+	sub		rsp, 40                     ; 32 + 8 for alignment
+
+	mov		ecx, -11                    ; STD_OUTPUT_HANDLE
+	call	[GetStdHandle]
+
+	mov		rcx, rax                    ; Handle
+	lea		rdx, [message]              ; Buffer
+	mov		r8,  message_len            ; Length
+	lea		r9,  [written]              ; Bytes written
+	push	0                           ; Reserved parameter
+	sub		rsp, 32                     ; Shadow space
+	call	[WriteConsoleA]
+	add		rsp, 40                     ; Cleanup stack + reserved param
+
+	xor		ecx, ecx                    ; Exit code 0
+	call	[ExitProcess]
+
+section '.idata' import data readable
+	library kernel32,'KERNEL32.DLL'
+
+include 'win64a.inc'
+
+import kernel32,\
+	GetStdHandle,'GetStdHandle',\
+	WriteConsoleA,'WriteConsoleA',\
+	ExitProcess,'ExitProcess'