- __asm__ __volatile__ ("call *%8" : "=d"(hv_status_hi),
- "=a"(hv_status_lo) : "d" (control_hi),
- "a" (control_lo), "b" (input_address_hi),
- "c" (input_address_lo), "D"(output_address_hi),
- "S"(output_address_lo), "m" (hypercall_page));
+ __asm__ __volatile__(CALL_NOSPEC
+ : "=d" (hv_status_hi), "=a" (hv_status_lo),
+ "+c" (input_address_lo), ASM_CALL_CONSTRAINT
+ : "d" (control_hi), "a" (control_lo),
+ "b" (input_address_hi),
+ "D"(output_address_hi), "S"(output_address_lo),
+ THUNK_TARGET(hypercall_page)
+ : "cc", "memory");