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