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2024-10-27 14:51:41 +08:00
parent 1f32ffbe34
commit a1f1cebfb3
1 changed files with 4 additions and 7 deletions
--- a/binary_patch.py
+++ b/binary_patch.py
@@ -76,13 +76,10 @@ def patch_strcpy(nbytes, save_path, output=True):
    push rcx;
    push rdx;
    xor rcx, rcx;
-  loop:
    mov rdx, {nbytes-1};
-    mov al, [rcx + rsi];
-    
-    cmp rcx, rdx;
-    jge ret_code;
-
+    mov byte ptr [rdx + rsi], 0;
+  loop:
+    mov al, [rsi + rcx];
    test al, al;
    je ret_code;
    
@@ -90,7 +87,7 @@ def patch_strcpy(nbytes, save_path, output=True):
    
    inc rcx;
    jmp loop;
-    
+
  ret_code:
    mov [rsi + rcx], al;
    pop rdx;