start working on overwriting locals example

buffer-overflow/src/project.ts

@@ -1,7 +1,8 @@
 import {makeProject} from '@motion-canvas/core';
 
 import functionCall from './scenes/function-run?scene';
+import overwritingLocals from './scenes/overwriting-locals?scene';
 
 export default makeProject({
-  scenes: [functionCall],
+  scenes: [functionCall, overwritingLocals],
 });

buffer-overflow/src/scenes/overwriting-locals.meta

@@ -0,0 +1,5 @@
+{
+  "version": 0,
+  "timeEvents": [],
+  "seed": 756399355
+}

buffer-overflow/src/scenes/overwriting-locals.tsx

@@ -0,0 +1,207 @@
+import {Circle, Layout, Ray, Rect, Txt, makeScene2D} from '@motion-canvas/2d';
+import { CodeBlock, remove, insert, edit } from '@motion-canvas/2d/lib/components/CodeBlock';
+import {Reference, all, beginSlide, createRef, createSignal} from '@motion-canvas/core';
+
+const BACKGROUND = '#282C34';
+const RED = '#E06C75';
+const GREEN = '#98C379';
+const YELLOW = '#E5C07B';
+const BLUE = '#61AFEF';
+const MAGENTA = '#C678DD';
+const CYAN = '#56B6C2';
+const GRAY = '#ABB2BF';
+const WHITE = '#FFFFFF';
+const BLACK = '#000000';
+
+export default makeScene2D(function* (view) {
+    const code = createRef<CodeBlock>();
+    yield view.add(
+        <CodeBlock
+        ref={code}
+        language='c'
+        code={`
+        #include <stdio.h>
+        #include <stdlib.h>
+
+        int main(void) {
+            char local_30[32];
+            int local_c = 0xdeadbeef;
+            printf("Enter your name: ");
+            gets(local_30);
+            printf("Welcome %s!\\n", local_30);
+            if(local_c != 0xdeadbeef) {
+                printf("You win!\\n");
+            }
+            return 0;
+        }
+        `}
+        fontSize={30}
+    />);
+
+    yield* beginSlide('C code');
+
+    view.removeChildren();
+
+    yield view.add(
+        <CodeBlock
+        ref={code}
+        language='asm'
+        code={`
+    main:
+        PUSH RBP
+        MOV RBP, RSP
+        SUB RSP, 0x30
+        MOV DWORD PTR [RBP - 0xc], 0xdeadbeef
+        LEA RAX,[s_Enter_your_name_]
+        MOV RDI,RAX
+        MOV EAX,0x0
+        CALL libc.so.6::printf
+        LEA RAX,[RBP - 0x30]
+        MOV RDI,RAX
+        MOV EAX,0x0
+        CALL libc.so.6::gets
+        LEA RAX,[RBP - 0x30]
+        MOV RSI,RAX
+        LEA RAX,[s_Welcome__s!]
+        MOV RDI,RAX
+        MOV EAX,0x0
+        CALL libc.so.6::printf
+        CMP DWORD PTR [RBP - 0xc],0xdeadbeef
+        JZ not_win
+        LEA RAX,[s_You_win!]
+        MOV RDI,RAX
+        CALL libc.so.6::puts
+    not_win:
+        MOV EAX,0x0
+        LEAVE
+        RET
+        `}
+        fontSize={30}
+    />);
+
+    yield* beginSlide('Assembly code');
+
+    yield* code().edit(1.5, false)`
+    main:
+        PUSH RBP
+        MOV RBP, RSP
+        SUB RSP, 0x30
+        MOV DWORD PTR [RBP - 0xc], 0xdeadbeef${
+        remove(`
+    LEA RAX,[s_Enter_your_name_]
+    MOV RDI,RAX
+    MOV EAX,0x0
+    CALL libc.so.6::printf`)}
+        LEA RAX,[RBP - 0x30]
+        MOV RDI,RAX${
+        remove(`
+    MOV EAX,0x0`)}
+        CALL libc.so.6::gets
+        LEA RAX,[RBP - 0x30]
+        MOV RSI,RAX
+        LEA RAX,[s_Welcome__s!]
+        MOV RDI,RAX${
+        remove(`
+    MOV EAX,0x0`)}
+        CALL libc.so.6::printf
+        CMP DWORD PTR [RBP - 0xc],0xdeadbeef
+        JZ not_win
+        LEA RAX,[s_You_win!]
+        MOV RDI,RAX
+        CALL libc.so.6::puts
+    not_win:
+        MOV EAX,0x0
+        LEAVE
+        RET`;
+
+    yield* code().edit(1.5, false)`
+    main:
+        PUSH RBP
+        MOV RBP, RSP
+        SUB RSP, 0x30
+        MOV DWORD PTR [RBP - 0xc], 0xdeadbeef
+        ${edit(`LEA RAX,[RBP - 0x30]
+    MOV RDI,RAX`, "LEA RDI,[RBP - 0x30]")}
+        CALL libc.so.6::gets
+        ${edit(`LEA RAX,[RBP - 0x30]
+    MOV RSI,RAX`, "LEA RSI,[RBP - 0x30]")}
+        ${edit(`LEA RAX,[s_Welcome__s!]
+    MOV RDI,RAX`, "LEA RDI,[s_Welcome__s!]")}
+        CALL libc.so.6::printf
+        CMP DWORD PTR [RBP - 0xc],0xdeadbeef
+        JZ not_win
+        ${edit(`LEA RAX,[s_You_win!]
+    MOV RDI,RAX`, "LEA RDI,[s_You_win!]")}
+        CALL libc.so.6::puts
+    not_win:
+        MOV EAX,0x0
+        LEAVE
+        RET`;
+
+    yield* code().edit(1.5, false)`
+    main:
+        PUSH RBP
+        MOV RBP, RSP
+        SUB RSP, 0x30${
+        insert(`
+    ; local_c = 0xdeadbeef`)}
+        MOV DWORD PTR [RBP - 0xc], 0xdeadbeef
+        LEA RDI,[RBP - 0x30]${
+        insert(`
+    ; gets(local_30)`)}
+        CALL libc.so.6::gets
+        LEA RSI,[RBP - 0x30]
+        LEA RDI,[s_Welcome__s!]${
+        insert(`
+    ; printf(\"Welcome %s!\\n\", local_30)`)}
+        CALL libc.so.6::printf${
+        insert(`
+    ; if(local_c != 0xdeadbeef)`)}
+        CMP DWORD PTR [RBP - 0xc],0xdeadbeef
+        JZ not_win
+        LEA RDI,[s_You_win!]${
+        insert(`
+    ; puts(\"You win!\")`)}
+        CALL libc.so.6::puts
+    not_win:${
+        insert(`
+    ; return 0`)}
+        MOV EAX,0x0
+        LEAVE
+        RET`;
+
+    yield* beginSlide('Assembly code cleaned');
+
+    yield* code().edit(1.5, false)`
+    ${insert(`; int main(void)
+; int               EAX:4           <RETURN>
+; undefined4        Stack[-0xc]:4   local_c
+; undefined1[44]    Stack[-0x38]... local_38
+`)}main:
+        PUSH RBP
+        MOV RBP, RSP
+        SUB RSP, 0x30
+        ; local_c = 0xdeadbeef
+        MOV DWORD PTR [RBP - 0xc], 0xdeadbeef
+        LEA RDI,[RBP - 0x30]
+        ; gets(local_30)
+        CALL libc.so.6::gets
+        LEA RSI,[RBP - 0x30]
+        LEA RDI,[s_Welcome__s!]
+        ; printf(\"Welcome %s!\\n\", local_30)
+        CALL libc.so.6::printf
+        ; if(local_c != 0xdeadbeef)
+        CMP DWORD PTR [RBP - 0xc],0xdeadbeef
+        JZ not_win
+        LEA RDI,[s_You_win!]
+        ; puts(\"You win!\")
+        CALL libc.so.6::puts
+    not_win:
+        ; return 0
+        MOV EAX,0x0
+        LEAVE
+        RET`;
+
+
+    yield* beginSlide('Assembly code with header');
+});