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// Copyright 2019 The gVisor Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// +build arm64
// test_util_arm64.s provides ARM64 test functions.
#include "funcdata.h"
#include "textflag.h"
#define SYS_GETPID 172
// This function simulates the getpid syscall.
TEXT ·Getpid(SB),NOSPLIT,$0
NO_LOCAL_POINTERS
MOVD $SYS_GETPID, R8
SVC
RET
TEXT ·Touch(SB),NOSPLIT,$0
start:
MOVD 0(R8), R1
MOVD $SYS_GETPID, R8 // getpid
SVC
B start
TEXT ·HaltLoop(SB),NOSPLIT,$0
start:
HLT
B start
// This function simulates a loop of syscall.
TEXT ·SyscallLoop(SB),NOSPLIT,$0
start:
SVC
B start
TEXT ·SpinLoop(SB),NOSPLIT,$0
start:
B start
TEXT ·FloatingPointWorks(SB),NOSPLIT,$0-8
NO_LOCAL_POINTERS
FMOVD $(9.9), F0
MOVD $SYS_GETPID, R8 // getpid
SVC
FMOVD $(9.9), F1
FCMPD F0, F1
BNE isNaN
MOVD $1, R0
MOVD R0, ret+0(FP)
RET
isNaN:
MOVD $0, ret+0(FP)
RET
// MVN: bitwise logical NOT
// This case simulates an application that modified R0-R30.
#define TWIDDLE_REGS() \
MVN R0, R0; \
MVN R1, R1; \
MVN R2, R2; \
MVN R3, R3; \
MVN R4, R4; \
MVN R5, R5; \
MVN R6, R6; \
MVN R7, R7; \
MVN R8, R8; \
MVN R9, R9; \
MVN R10, R10; \
MVN R11, R11; \
MVN R12, R12; \
MVN R13, R13; \
MVN R14, R14; \
MVN R15, R15; \
MVN R16, R16; \
MVN R17, R17; \
MVN R18_PLATFORM, R18_PLATFORM; \
MVN R19, R19; \
MVN R20, R20; \
MVN R21, R21; \
MVN R22, R22; \
MVN R23, R23; \
MVN R24, R24; \
MVN R25, R25; \
MVN R26, R26; \
MVN R27, R27; \
MVN g, g; \
MVN R29, R29; \
MVN R30, R30;
TEXT ·TwiddleRegsSyscall(SB),NOSPLIT,$0
TWIDDLE_REGS()
SVC
RET // never reached
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