76 lines
2.0 KiB
Go
76 lines
2.0 KiB
Go
// Copyright 2018 Google Inc.
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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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// Package testutil provides common assembly stubs for testing.
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package testutil
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import (
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"fmt"
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"strings"
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)
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// Getpid executes a trivial system call.
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func Getpid()
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// Touch touches the value in the first register.
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func Touch()
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// SyscallLoop executes a syscall and loops.
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func SyscallLoop()
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// SpinLoop spins on the CPU.
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func SpinLoop()
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// HaltLoop immediately halts and loops.
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func HaltLoop()
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// TwiddleRegsFault twiddles registers then faults.
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func TwiddleRegsFault()
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// TwiddleRegsSyscall twiddles registers then executes a syscall.
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func TwiddleRegsSyscall()
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// TwiddleSegments reads segments into known registers.
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func TwiddleSegments()
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// FloatingPointWorks is a floating point test.
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//
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// It returns true or false.
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func FloatingPointWorks() bool
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// RegisterMismatchError is used for checking registers.
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type RegisterMismatchError []string
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// Error returns a human-readable error.
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func (r RegisterMismatchError) Error() string {
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return strings.Join([]string(r), ";")
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}
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// addRegisterMisatch allows simple chaining of register mismatches.
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func addRegisterMismatch(err error, reg string, got, expected interface{}) error {
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errStr := fmt.Sprintf("%s got %08x, expected %08x", reg, got, expected)
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switch r := err.(type) {
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case nil:
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// Return a new register mismatch.
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return RegisterMismatchError{errStr}
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case RegisterMismatchError:
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// Append the error.
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r = append(r, errStr)
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return r
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default:
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// Leave as is.
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return err
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}
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}
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