1/* SPDX-License-Identifier: BSD-2-Clause */ 2/* 3 * Copyright (c) 2015, Linaro Limited 4 * Copyright (c) 2014, STMicroelectronics International N.V. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions are met: 9 * 10 * 1. Redistributions of source code must retain the above copyright notice, 11 * this list of conditions and the following disclaimer. 12 * 13 * 2. Redistributions in binary form must reproduce the above copyright notice, 14 * this list of conditions and the following disclaimer in the documentation 15 * and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 18 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE 21 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 22 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 23 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 24 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 25 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 26 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 27 * POSSIBILITY OF SUCH DAMAGE. 28 */ 29 30#include <tee_syscall_numbers.h> 31#include <asm.S> 32 33#if defined(CFG_UNWIND) 34#define UNWIND(...) __VA_ARGS__ 35#else 36#define UNWIND(...) 37#endif 38 39 .section .text 40 .balign 4 41 .code 32 42 43 .macro UTEE_SYSCALL name, scn, num_args 44 FUNC \name , : 45 46UNWIND( .fnstart) 47 push {r5-r7,lr} 48UNWIND( .save {r5-r7,lr}) 49 mov r7, #(\scn) 50 .if \num_args > TEE_SVC_MAX_ARGS 51 .error "Too many arguments for syscall" 52 .endif 53 .if \num_args <= 4 54 @ No arguments passed on stack 55 mov r6, #0 56 .else 57 @ Tell number of arguments passed on the stack 58 mov r6, #(\num_args - 4) 59 @ Point just before the push (4 registers) above on the first argument 60 add r5, sp, #(4 * 4) 61 .endif 62 svc #0 63 pop {r5-r7,pc} 64UNWIND( .fnend) 65 END_FUNC \name 66 .endm 67 68 FUNC utee_panic, : 69UNWIND( .fnstart) 70 push {r0-r11, lr} 71UNWIND( .save {r0-r11, lr}) 72 mov lr, pc 73 push {lr} 74UNWIND( .save {lr}) 75 mov r1, sp 76 bl __utee_panic 77 /* Not reached */ 78UNWIND( .fnend) 79 END_FUNC utee_panic 80 81#include "utee_syscalls_asm.S" 82