phase6: add the symbol registry and per-region flag overrides, and register 0x8002D2A0

src/func_8002D2A0.c

@@ -0,0 +1,27 @@
+/*
+ * func_8002D2A0 — 28 bytes at 0x8002D2A0..0x8002D2BC
+ *
+ * Byte-identical reconstruction of a leaf predicate. The original loads a
+ * global word, subtracts the first argument, and returns whether the unsigned
+ * difference is at least the second argument.
+ *
+ * The observed instructions are:
+ *     lui   v0,0x8012           \  v0 = g_80122354
+ *     lw    v0,9044(v0)         /
+ *     nop
+ *     subu  v0,v0,a0            v0 = g - a
+ *     sltu  v0,v0,a1            v0 = (g - a) < b
+ *     jr    ra
+ *     xori  v0,v0,0x1           return !((g - a) < b)   (delay slot)
+ *
+ * LIMITS: the function name, the global's name and its type are hypotheses
+ * reconstructed from the disassembly. Only the compiled bytes are evidence.
+ * `g_80122354` is defined by the tracked `config/symbols.tsv`; it is an
+ * address placeholder, not a proven name.
+ */
+
+extern int g_80122354;
+
+int func_8002D2A0(int a, int b) {
+    return (unsigned)(g_80122354 - a) >= (unsigned)b;
+}