1 /* 2 * Semihosting Tests 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 #define SYS_WRITE0 0x04 11 #define SYS_READC 0x07 12 #define SYS_REPORTEXC 0x18 13 14 uintptr_t __semi_call(uintptr_t type, uintptr_t arg0) 15 { 16 #if defined(__arm__) 17 register uintptr_t t asm("r0") = type; 18 register uintptr_t a0 asm("r1") = arg0; 19 #ifdef __thumb__ 20 # define SVC "svc 0xab" 21 #else 22 # define SVC "svc 0x123456" 23 #endif 24 asm(SVC : "=r" (t) 25 : "r" (t), "r" (a0)); 26 #else 27 register uintptr_t t asm("x0") = type; 28 register uintptr_t a0 asm("x1") = arg0; 29 asm("hlt 0xf000" 30 : "=r" (t) 31 : "r" (t), "r" (a0)); 32 #endif 33 34 return t; 35 } 36