Handle freezing code of blue coin properly

Also fix gpMarDirector r13 offset for all versions

changelog.md

@@ -1,5 +1,5 @@
 # Changelog
-## Apr 21, 2022
+## Apr 22, 2022
 ### Shortened QFT
 - Shortened QFT's freeze code by replacing C2 with 04(bl@event) and 07.
 - Reserve `817F0348`~`817F03BF` (120 bytes)

site/.vuepress/components/codes/qft/code/GMSE01.js

@@ -1,3 +1,5 @@
+export const r13off = -0x6048;
+
 /**
  * @type {{[key: string]: [addr: number, orig: number]}}
  */

site/.vuepress/components/codes/qft/code/GMSJ01.js

@@ -1,3 +1,5 @@
+export const r13off = -0x6818;
+
 /**
  * @type {{[key: string]: [addr: number, orig: number]}}
  */

site/.vuepress/components/codes/qft/code/GMSJ0A.js

@@ -1,3 +1,5 @@
+export const r13off = -0x6188;
+
 /**
  * @type {{[key: string]: [addr: number, orig: number]}}
  */

site/.vuepress/components/codes/qft/code/GMSP01.js

@@ -1,3 +1,5 @@
+export const r13off = -0x6120;
+
 /**
  * @type {{[key: string]: [addr: number, orig: number]}}
  */

site/.vuepress/components/codes/qft/codegen.js

@@ -65,44 +65,95 @@ export const codes = { GMSJ01, GMSE01, GMSP01, GMSJ0A };
   bl 817fxxxx
 ****/
 const freezeCodeAddr = 0x817f0348;
-const freezeCode = [0x3d80817f, 0x916c00bc, 0x816d97e8, 0x816b005c, 0x916c00b8, 0x4e800020];
-
 export default function codegen(version) {
   const config = getConfig();
-  const { freezeCodeInfo, baseCode } = codes[version] ?? {};
+  const { freezeCodeInfo, baseCode, r13off } = codes[version] ?? {};
   if (baseCode == null) return '';
 
   let code = baseCode;
 
-  // freeze code
-  const code04 = [];
-  const code07 = [...freezeCode];
-  let dst = freezeCodeAddr + 24;
+  // freezing code
+  const freezeConfigs = [];
   for (const [key, frame] of Object.entries(config.freeze)) {
     const info = freezeCodeInfo[key];
     if (frame > 0 && info) {
       const [addr, orig] = info;
+      if (key === 'blueCoin') {
+        // special: needs to adjust QF -> use separate C2 instead
+        code += [
+          0xc2000000 + (addr & 0x1ffffff),
+          0x00000005,
+          orig,
+          0x80a3005c,
+          0x38a50003,
+          0x54a0003a,
+          0x3ca0817f,
+          0x900500b8,
+          0x38000000 | (frame & 0xffff),
+          0x900500bc,
+          0x60000000,
+          0x00000000,
+        ]
+          .map(int32)
+          .join('');
+      } else {
+        // handle regular freezing code later
+        freezeConfigs.push({ frame, addr, orig });
+      }
+    }
+  }
+  // handle regular freezing code
+  if (freezeConfigs.length <= 1) {
+    // use C2 directly
+    code += freezeConfigs
+      .flatMap(({ frame, addr, orig }) => [
+        0xc2000000 + (addr & 0x1ffffff),
+        0x00000004,
+        0x39600000 | (frame & 0xffff), // li r11, frame
+        0x3d80817f, // lis r12, 0x817F
+        0x916c00bc, // stw r11, 0xBC(r12)
+        0x816d0000 | (r13off & 0xffff), // lwz r11, r13off(r13)
+        0x816b005c, // lwz r11, 0x5C(r11)
+        0x916c00b8, // stw r11, 0xB8(r12)
+        orig,
+        0x00000000,
+      ])
+      .map(int32)
+      .join('');
+  } else {
+    let dst = freezeCodeAddr + 24;
+    const code04 = [];
+    const code07 = [
+      0x3d80817f, // lis r12, 0x817F
+      0x916c00bc, // stw r11, 0xBC(r12)
+      0x816d0000 | (r13off & 0xffff), // lwz r11, r13off(r13)
+      0x816b005c, // lwz r11, 0x5C(r11)
+      0x916c00b8, // stw r11, 0xB8(r12)
+      0x4e800020, // blr
+    ];
+    // put code together
+    for (const { frame, addr, orig } of freezeConfigs) {
       code07.push(
         orig, // [dst] original instruction
         0x39600000 | (frame & 0xffff), // li r11, $frame
         0x4c000000 + (freezeCodeAddr - dst - 8), // b freezeCode
       );
       code04.push(
-        0x04000000 | (addr & 0x1ffffff), // 04xxxxxx
-        0x48000001 | (dst - addr), // bl
+        0x04000000 | (addr & 0x1ffffff), // 04 addr
+        0x48000001 | (dst - addr), // bl dst
       );
       dst += 12;
     }
-  }
-  if (code04.length) {
+    // make 07 code
     code07.unshift(
-      0x06000000 | (freezeCodeAddr & 0x1ffffff), // 07xxxxxx
+      0x06000000 | (freezeCodeAddr & 0x1ffffff), // 07 freezeCodeAddr
       code07.length * 4,
     );
     if (code07.length & 1) {
-      // odd -> add 0
+      // odd => pad with 0
       code07.push(0);
     }
+    // apply code
     code += [...code04, ...code07].map(int32).join('');
   }