wip

.gitignore

@@ -0,0 +1,4 @@
+*.ilk
+*.pdb
+*.obj
+*sublime-workspace

art-of-masm.sublime-project

@@ -0,0 +1,8 @@
+{
+	"folders":
+	[
+		{
+			"path": "."
+		}
+	]
+}

src/1_8.asm

@@ -17,3 +17,45 @@ fmt_string  byte        "User entered: '%s'", nl, 0
 input       byte maxlen dup (?)
 
 
+    .code
+
+    externdef printf:proc
+    externdef readline:proc
+
+    public get_title
+
+; procedure loads the address of the title_str into the RAX
+; register, this is the register where C expects to find 
+; the return of this proc. (WINDOWS ABI)
+get_title proc
+    
+    lea rax, title_str  ; load address of title string in RAX register
+    ret
+
+get_title endp
+
+; ASM Main function
+    public asm_main
+asm_main proc 
+
+    sub     rsp, 56
+    
+    lea     rcx, prompt     ; load prompt string address into RCX register
+    call    printf          ; this is the reigster where ABI tells us to place arguments
+
+    mov     input, 0        ; ensure the input string is terminated with 0
+
+    lea     rcx, input      ; load input address to rcx register
+    mov     rdx, maxlen     ; move maxlen into rdx register
+    call    readline        ; use rcx and rdx as arguments to call readline
+
+    lea     rcx, fmt_string
+    lea     rdx, input
+    call    printf
+
+    add     rsp, 56
+    ret
+
+asm_main endp
+
+    end

src/2_2.asm

@@ -0,0 +1,52 @@
+
+    option casemap:none
+
+nl      =       10
+
+
+    .data
+
+left_op     dword       0f0f0f0fh
+right_op1   dword       0f0f0f0f0h
+right_op2   dword       12345678h
+
+
+title_str   byte        "Listing 2-2", 0
+
+fmt_str1    byte        "%lx AND %lx = %lx", nl, 0
+fmt_str2    byte        "%lx OR %lx = %lx", nl, 0
+fmt_str3    byte        "%lx XOR %lx = %lx", nl, 0
+fmt_str4    byte        "%NOT lx = %lx", nl, 0
+
+    .code
+    externdef printf:proc
+
+    public get_title
+get_title PROC
+    lea     rax, title_str      ; load title string address into rax register
+    ret
+get_title ENDP
+
+    public asm_main
+asm_main PROC
+    sub     rsp, 56
+
+; AND operator
+    lea     rcx, fmt_str1       ; load fmt str address 
+    mov     edx, left_op
+    mov     r8d, right_op1
+    mov     r9d, edx
+    and     r9d, r8d
+    call    printf
+
+    lea     rcx, fmt_str1
+    mov     edx, left_op
+    mov     r8d, right_op2
+    mov     r9d, r8d
+    and     r9d, edx
+    call    printf
+
+asm_main ENDP
+
+    END
+    

src/build.bat

@@ -0,0 +1,4 @@
+@echo off
+echo ~~~~ starting build ~~~~
+ml64 /nologo /c /Zi /Cp %1.asm
+cl /nologo /O2 /Zi /utf-8 /EHa /Fe%1.exe c.cpp %1.obj

src/c.cpp

@@ -17,7 +17,7 @@ extern "C"
 int readline(char *dest, int maxlen) 
 {
     char *result = fgets(dest, maxlen, stdin);
-    if (results != NULL) {
+    if (result != NULL) {
         int len = strlen(result);
         if (len > 0) {
             dest[len - 1] = 0;
@@ -25,7 +25,7 @@ int readline(char *dest, int maxlen)
         return(len);
     }
 
-    return(-1) // an error occured
+    return(-1); // an error occured
 }
 
 int main(void)
@@ -34,10 +34,10 @@ int main(void)
     try {
         char *title = get_title();
         printf("calling %s\n", title);
-        asm_func();
+        asm_main();
         printf("%s terminated\n", title);
 
     } catch(...) {
-        printf("an error occured!")
+        printf("an error occured!");
     }
 }