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106 lines
2.4 KiB
Go
106 lines
2.4 KiB
Go
//go:build !remote
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package emulation
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import (
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"fmt"
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"strings"
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"testing"
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"github.com/stretchr/testify/assert"
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"github.com/stretchr/testify/require"
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)
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// parseBinfmtMisc parses a binfmt_misc registry entry. It returns the offset,
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// magic, and mask values, or an error if there was an error parsing the data.
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// If the returned offset is negative, the entry was disabled or should be
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// non-fatally ignored for some other reason.
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func TestParseBinfmtMisc(t *testing.T) {
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vectors := []struct {
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platform, contents string
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}{
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{
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"linux/386",
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`
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enabled
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interpreter /usr/bin/qemu-i386-static
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flags: F
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offset 0
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magic 7f454c4601010100000000000000000002000300
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mask fffffffffffefe00fffffffffffffffffeffffff
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`,
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},
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{
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"linux/amd64",
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`
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enabled
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interpreter /usr/bin/qemu-x86_64-static
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flags: F
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offset 0
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magic 7f454c4602010100000000000000000002003e00
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mask fffffffffffefe00fffffffffffffffffeffffff
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`,
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},
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{
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"linux/arm",
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`
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enabled
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interpreter /usr/bin/qemu-arm-static
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flags: F
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offset 0
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magic 7f454c4601010100000000000000000002002800
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mask ffffffffffffff00fffffffffffffffffeffffff
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`,
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},
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{
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"linux/arm64",
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`
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enabled
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interpreter /usr/bin/qemu-aarch64-static
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flags: F
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offset 0
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magic 7f454c460201010000000000000000000200b700
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mask ffffffffffffff00fffffffffffffffffeffffff
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`,
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},
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{
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"linux/ppc64le",
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`
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enabled
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interpreter /usr/bin/qemu-ppc64le-static
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flags: F
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offset 0
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magic 7f454c4602010100000000000000000002001500
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mask ffffffffffffff00fffffffffffffffffeffff00
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`,
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},
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{
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"linux/s390x",
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`
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enabled
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interpreter /usr/bin/qemu-s390x-static
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flags: F
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offset 0
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magic 7f454c4602020100000000000000000000020016
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mask ffffffffffffff00fffffffffffffffffffeffff
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`,
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},
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}
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for i := range vectors {
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v := vectors[i]
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t.Run(v.platform, func(t *testing.T) {
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offset, magic, mask, err := parseBinfmtMisc(fmt.Sprintf("test vector %d", i), strings.NewReader(v.contents))
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require.NoError(t, err, "parseBinfmtMisc: %v", err)
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require.GreaterOrEqual(t, offset, 0, "%q shouldn't have been disabled", v.platform)
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headers := getKnownELFPlatformHeaders()[v.platform]
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matched := false
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for _, header := range headers {
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if magicMatch(header, offset, mask, magic) {
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matched = true
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}
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}
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assert.True(t, matched, "%q did not match an expected header match", v.platform)
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})
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}
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}
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