[release/3.1] Fix lazy machine state unwinding for MSVC epilogues on x86 (#28150)

Author: hoyosjs

src/vm/i386/gmsx86.cpp

@@ -828,6 +828,8 @@ void LazyMachState::unwindLazyState(LazyMachState* baseState,
             case 0x89:                          // MOV r/m, reg
                 if (ip[1] == 0xEC)              // MOV ESP, EBP
                     goto mov_esp_ebp;
+                if (ip[1] == 0xDC)              // MOV ESP, EBX
+                    goto mov_esp_ebx;
                 // FALL THROUGH
 
             case 0x18:                          // SBB r/m8, r8
@@ -933,6 +935,13 @@ void LazyMachState::unwindLazyState(LazyMachState* baseState,
                     break;
                 }
 
+                if (ip[1] == 0xE3) {           // MOV ESP, EBX
+                mov_esp_ebx:
+                    ESP = PTR_TADDR(lazyState->_ebx);
+                    ip += 2;
+                    break;
+                }
+
                 if ((ip[1] & 0xc7) == 0x4 && ip[2] == 0x24) // move reg, [esp]
                 {
                     if ( ip[1] == 0x1C ) {  // MOV EBX, [ESP]