And Lesson 9: Stdin, goes into the X86_64 update pile.

.gitignore

@@ -6,3 +6,4 @@ hello
 strlen
 subroutines
 includes
+stdin

x86/Makefile

@@ -37,6 +37,9 @@ includes: includes.o ## Build Lesson 5: Separate strlen() and puts() into their
 argv: argv.o  ## Build Lesson 7 and 8: Line feeds and command line arguments
 	$(LD) -m $(LINK_32) -o $@ $<
 
+stdin: stdin.o  ## Build Lesson 9: Reading from stdin
+	$(LD) -m $(LINK_32) -o $@ $<
+
 help: run-help   ## Print this helpful message (default)
 
 clean:

x86/stdin.s

@@ -0,0 +1,45 @@
+    ;; Lesson 9: User Input via STDIN.
+
+%include    "functions.asm"
+%define     ILEN    255          ; Amount of space to reserve
+
+    ;; sys/unistd_32.h
+%define     SYS_read	3
+
+    ;; unistd.h
+%define STDIN		0
+
+    
+section .data
+    msg1    db  "Please enter your name: ", 0h
+    msg2    db  "Hello, ", 0h
+
+section .bss
+    sinput  resb    ILEN         ; Reserve 255 bytes of space.  The space has no guarantees that I know of.
+
+section .text
+    global _start
+
+_start:
+    mov     eax, msg1
+    call    putslf
+
+    mov     edx, ILEN
+    mov     ecx, sinput
+    mov     ebx, STDIN
+    mov     eax, SYS_read
+    int     80h
+
+    mov     eax, msg2
+    call    puts
+
+    mov     eax, sinput
+    call    puts                ; By default, sinput keeps the LF terminator!
+
+    call    exit_program
+    
+    
+
+    
+
+    

x86_64/Makefile

@@ -37,6 +37,9 @@ includes: includes.o  ## Build Lesson 5: Separate strlen() and puts() into their
 argv: argv.o  ## Build Lesson 7 and 8: Line feeds and command line arguments
 	$(LD) -m $(LINK_64) -o $@ $<
 
+stdin: stdin.o  ## Build Lesson 9: Reading from stdin
+	$(LD) -m $(LINK_64) -o $@ $<
+
 help: run-help   ## Print this helpful message (default)
 
 clean:

x86_64/stdin.s

@@ -0,0 +1,43 @@
+    ;; Lesson 9: User Input via STDIN.
+
+%include    "functions.asm"
+%define     ILEN    255          ; Amount of space to reserve
+
+    ;; sys/unistd_64.h
+%define     SYS_read	0
+
+    ;; unistd.h
+%define STDIN		0
+
+    
+section .data
+    msg1    db  "Please enter your name: ", 0h
+    msg2    db  "Hello, ", 0h
+
+section .bss
+    sinput  resb    ILEN         ; Reserve 255 bytes of space.  The space has no guarantees that I know of.
+
+section .text
+    global _start
+
+_start:
+    ;; Again, the challenge with x86_64 is knowing what register to us.
+    ;; In this case, RSI - Source Indexing.
+    mov     rsi, msg1
+    call    puts
+
+    mov     rax, SYS_read       ; General purpose register
+    mov     rdi, STDIN          ; Destination Index
+    mov     rsi, sinput         ; Source register
+    mov     rdx, ILEN           ; Common counter
+
+    ;; And remembering to use 'syscall' instead of interrupt-80
+    syscall
+    
+    mov     rsi, msg2
+    call    puts
+
+    mov     rsi, sinput
+    call    puts
+
+    call    exit_program