fix(verify): gate JIT verification to amd64 until trampolines are hardened

verify/abi_amd64.go

@@ -14,6 +14,14 @@ package verify
 //lint:ignore U1000 written and read by the assembly
 var savedBP uintptr
 
+// savedR14 holds the caller's goroutine pointer across the ABI-checked JIT
+// call; the trampoline restores it before returning into Go code.
+//
+// noinspection GoUnusedGlobalVariable
+//
+//lint:ignore U1000 written and read by the assembly
+var savedR14 uintptr
+
 // leaveCheckedPtr is initialised by the linker from the GLOBL/DATA in
 // abi_amd64.s: it holds the raw address of leaveJITCheckedRaw (which has
 // no ABIInternal wrapper, so the JIT function RETs directly into it).