made puts wor for strings as well an some other changes

build/test.asm

@@ -19,6 +19,36 @@ _start:
     mov rax, 60
     syscall
 word_puts:
+	; detects string if top is len>=0 and next is a pointer in [data_start, data_end)
+	mov rax, [r12]      ; len or int value
+	mov rbx, [r12 + 8]  ; possible address
+	cmp rax, 0
+	jl puts_print_int
+	lea r8, [rel data_start]
+	lea r9, [rel data_end]
+	cmp rbx, r8
+	jl puts_print_int
+	cmp rbx, r9
+	jge puts_print_int
+	; treat as string: (addr below len)
+	mov rdx, rax        ; len
+	mov rsi, rbx        ; addr
+	add r12, 16         ; pop len + addr
+	test rdx, rdx
+	jz puts_str_newline_only
+	mov rax, 1
+	mov rdi, 1
+	syscall
+puts_str_newline_only:
+	mov byte [rel print_buf], 10
+	mov rax, 1
+	mov rdi, 1
+	lea rsi, [rel print_buf]
+	mov rdx, 1
+	syscall
+	ret
+
+puts_print_int:
 	mov rax, [r12]
 	add r12, 8
 	mov rbx, rax
@@ -730,6 +760,9 @@ word_main:
     sub r12, 8
     mov qword [r12], 0
     ret
+section .data
+data_start:
+data_end:
 section .bss
 align 16
 dstack: resb DSTK_BYTES