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Adin ScannellandgVisor bot
5ba34bd1a5
For all trivial and zero frame-sized functions, we now require an explicit NOFRAME annotation as the heuristic has changed. See go.dev/cl/466316. Most of these functions do not *require* NOFRAME, but this change encodes the existing behavior in order to avoid accidental bugs or regressions. PiperOrigin-RevId: 513946210
136 lines
2.8 KiB
ArmAsm
136 lines
2.8 KiB
ArmAsm
// Copyright 2018 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 amd64
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// test_util_amd64.s provides AMD64 test functions.
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#include "funcdata.h"
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#include "textflag.h"
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TEXT ·Getpid(SB),NOSPLIT|NOFRAME,$0
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NO_LOCAL_POINTERS
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MOVQ $39, AX // getpid
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SYSCALL
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RET
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// func AddrOfGetpid() uintptr
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TEXT ·AddrOfGetpid(SB), $0-8
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MOVQ $·Getpid(SB), AX
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MOVQ AX, ret+0(FP)
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RET
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TEXT ·touch(SB),NOSPLIT|NOFRAME,$0
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start:
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MOVQ 0(AX), BX // deref AX
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MOVQ $39, AX // getpid
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SYSCALL
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JMP start
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// func AddrOfTouch() uintptr
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TEXT ·AddrOfTouch(SB), $0-8
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MOVQ $·touch(SB), AX
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MOVQ AX, ret+0(FP)
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RET
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TEXT ·syscallLoop(SB),NOSPLIT|NOFRAME,$0
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start:
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SYSCALL
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JMP start
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// func AddrOfSyscallLoop() uintptr
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TEXT ·AddrOfSyscallLoop(SB), $0-8
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MOVQ $·syscallLoop(SB), AX
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MOVQ AX, ret+0(FP)
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RET
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TEXT ·spinLoop(SB),NOSPLIT|NOFRAME,$0
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start:
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JMP start
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// func AddrOfSpinLoop() uintptr
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TEXT ·AddrOfSpinLoop(SB), $0-8
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MOVQ $·spinLoop(SB), AX
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MOVQ AX, ret+0(FP)
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RET
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TEXT ·FloatingPointWorks(SB),NOSPLIT|NOFRAME,$0
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NO_LOCAL_POINTERS
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MOVQ $1, AX
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MOVQ AX, X0
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MOVQ $39, AX // getpid
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SYSCALL
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MOVQ X0, AX
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CMPQ AX, $1
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SETEQ ret+0(FP)
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RET
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#define TWIDDLE_REGS() \
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NOTQ R15; \
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NOTQ R14; \
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NOTQ R13; \
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NOTQ R12; \
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NOTQ BP; \
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NOTQ BX; \
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NOTQ R11; \
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NOTQ R10; \
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NOTQ R9; \
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NOTQ R8; \
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NOTQ AX; \
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NOTQ CX; \
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NOTQ DX; \
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NOTQ SI; \
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NOTQ DI; \
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NOTQ SP;
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TEXT ·twiddleRegsSyscall(SB),NOSPLIT|NOFRAME,$0
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TWIDDLE_REGS()
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SYSCALL
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RET // never reached
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// func AddrOfTwiddleRegsSyscall() uintptr
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TEXT ·AddrOfTwiddleRegsSyscall(SB), $0-8
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MOVQ $·twiddleRegsSyscall(SB), AX
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MOVQ AX, ret+0(FP)
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RET
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TEXT ·twiddleRegsFault(SB),NOSPLIT|NOFRAME,$0
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TWIDDLE_REGS()
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JMP AX // must fault
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RET // never reached
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// func AddrOfTwiddleRegsFault() uintptr
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TEXT ·AddrOfTwiddleRegsFault(SB), $0-8
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MOVQ $·twiddleRegsFault(SB), AX
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MOVQ AX, ret+0(FP)
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RET
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#define READ_FS() BYTE $0x64; BYTE $0x48; BYTE $0x8b; BYTE $0x00;
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#define READ_GS() BYTE $0x65; BYTE $0x48; BYTE $0x8b; BYTE $0x00;
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TEXT ·twiddleSegments(SB),NOSPLIT|NOFRAME,$0
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MOVQ $0x0, AX
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READ_GS()
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MOVQ AX, BX
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MOVQ $0x0, AX
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READ_FS()
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SYSCALL
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RET // never reached
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// func AddrOfTwiddleSegments() uintptr
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TEXT ·AddrOfTwiddleSegments(SB), $0-8
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MOVQ $·twiddleSegments(SB), AX
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MOVQ AX, ret+0(FP)
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RET
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