1 /* 2 * Semihosting Tests - ARM Helper 3 * 4 * Copyright (c) 2019 5 * Written by Alex Bennée <alex.bennee@linaro.org> 6 * 7 * SPDX-License-Identifier: GPL-3.0-or-later 8 */ 9 10 uintptr_t __semi_call(uintptr_t type, uintptr_t arg0) 11 { 12 register uintptr_t t asm("r0") = type; 13 register uintptr_t a0 asm("r1") = arg0; 14 #ifdef __thumb__ 15 # define SVC "svc 0xab" 16 #else 17 # define SVC "svc 0x123456" 18 #endif 19 asm(SVC : "=r" (t) 20 : "r" (t), "r" (a0)); 21 return t; 22 } 23