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https://github.com/taigrr/gopher-os
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558cbf5f17
Since the actual size of each memory entry is not known in advance (bootloaders may append additional information to it) but needs to be queried off the memory map tag header we cannot reserve space for it as no memory allocation is yet available. Instead, a visitor pattern was implemented to allow the memory manager initialization block to easily mark the appropriate pages as reserved
189 lines
7.2 KiB
Go
189 lines
7.2 KiB
Go
package multiboot
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import (
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"testing"
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"unsafe"
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)
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func TestFindTagByType(t *testing.T) {
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specs := []struct {
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tagType tagType
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expSize uint32
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}{
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{tagBootCmdLine, 1},
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{tagBootLoaderName, 27},
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{tagBasicMemoryInfo, 8},
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{tagBiosBootDevice, 12},
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{tagMemoryMap, 152},
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{tagFramebufferInfo, 24},
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{tagElfSymbols, 972},
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{tagApmTable, 20},
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}
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SetInfoPtr(uintptr(unsafe.Pointer(&multibootInfoTestData[0])))
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for specIndex, spec := range specs {
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_, size := findTagByType(spec.tagType)
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if size != spec.expSize {
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t.Errorf("[spec %d] expected tag size for tag type %d to be %d; got %d", specIndex, spec.tagType, spec.expSize, size)
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}
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}
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}
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func TestFindTagByTypeWithMissingTag(t *testing.T) {
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SetInfoPtr(uintptr(unsafe.Pointer(&multibootInfoTestData[0])))
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if offset, size := findTagByType(tagModules); offset != 0 || size != 0 {
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t.Fatalf("expected findTagByType to return (0,0) for missing tag; got (%d, %d)", offset, size)
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}
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}
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func TestVisitMemRegion(t *testing.T) {
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specs := []struct {
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expPhys uint64
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expLen uint64
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expType MemoryEntryType
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}{
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// This region type is actually MemAvailable but we patch it to
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// a bogus value to test whether it gets flagged as reserved
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{0, 654336, MemReserved},
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{654336, 1024, MemReserved},
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{983040, 65536, MemReserved},
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{1048576, 133038080, MemAvailable},
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{134086656, 131072, MemReserved},
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{4294705152, 262144, MemReserved},
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}
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var visitCount int
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SetInfoPtr(uintptr(unsafe.Pointer(&emptyInfoData[0])))
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VisitMemRegions(func(_ *MemoryMapEntry) {
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visitCount++
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})
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if visitCount != 0 {
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t.Fatal("expected visitor not to be invoked when no memory map tag is present")
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}
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// Set a bogus type for the first entry in the map
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SetInfoPtr(uintptr(unsafe.Pointer(&multibootInfoTestData[0])))
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multibootInfoTestData[128] = 0xFF
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VisitMemRegions(func(entry *MemoryMapEntry) {
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if entry.PhysAddress != specs[visitCount].expPhys {
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t.Errorf("[visit %d] expected physical address to be %x; got %x", visitCount, specs[visitCount].expPhys, entry.PhysAddress)
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}
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if entry.Length != specs[visitCount].expLen {
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t.Errorf("[visit %d] expected region len to be %x; got %x", visitCount, specs[visitCount].expLen, entry.Length)
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}
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if entry.Type != specs[visitCount].expType {
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t.Errorf("[visit %d] expected region type to be %d; got %d", visitCount, specs[visitCount].expType, entry.Type)
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}
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visitCount++
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})
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if visitCount != len(specs) {
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t.Errorf("expected the visitor func to be invoked %d times; got %d", len(specs), visitCount)
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}
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}
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var (
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emptyInfoData = []byte{
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0, 0, 0, 0, // size
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0, 0, 0, 0, // reserved
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0, 0, 0, 0, // tag with type zero and length zero
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0, 0, 0, 0,
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}
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// A dump of multiboot data when running under qemu.
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multibootInfoTestData = []byte{
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72, 5, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 9, 0, 0, 0,
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0, 171, 253, 7, 118, 119, 123, 0, 2, 0, 0, 0, 35, 0, 0, 0,
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71, 82, 85, 66, 32, 50, 46, 48, 50, 126, 98, 101, 116, 97, 50, 45,
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57, 117, 98, 117, 110, 116, 117, 49, 46, 54, 0, 0, 0, 0, 0, 0,
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10, 0, 0, 0, 28, 0, 0, 0, 2, 1, 0, 240, 4, 213, 0, 0,
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0, 240, 0, 240, 3, 0, 240, 255, 240, 255, 240, 255, 0, 0, 0, 0,
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6, 0, 0, 0, 160, 0, 0, 0, 24, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 252, 9, 0, 0, 0, 0, 0,
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1, 0, 0, 0, 0, 0, 0, 0, 0, 252, 9, 0, 0, 0, 0, 0,
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0, 4, 0, 0, 0, 0, 0, 0, 2, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 15, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0,
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2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 16, 0, 0, 0, 0, 0,
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0, 0, 238, 7, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 254, 7, 0, 0, 0, 0, 0, 0, 2, 0, 0, 0, 0, 0,
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2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 252, 255, 0, 0, 0, 0,
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0, 0, 4, 0, 0, 0, 0, 0, 2, 0, 0, 0, 0, 0, 0, 0,
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9, 0, 0, 0, 212, 3, 0, 0, 24, 0, 0, 0, 40, 0, 0, 0,
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21, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 27, 0, 0, 0,
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1, 0, 0, 0, 2, 0, 0, 0, 0, 0, 16, 0, 0, 16, 0, 0,
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24, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 8, 0, 0, 0,
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0, 0, 0, 0, 38, 0, 0, 0, 1, 0, 0, 0, 6, 0, 0, 0,
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0, 16, 16, 0, 0, 32, 0, 0, 135, 26, 4, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 16, 0, 0, 0, 0, 0, 0, 44, 0, 0, 0,
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1, 0, 0, 0, 2, 0, 0, 0, 0, 48, 20, 0, 0, 64, 4, 0,
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194, 167, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 16, 0, 0,
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0, 0, 0, 0, 52, 0, 0, 0, 1, 0, 0, 0, 2, 0, 0, 0,
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224, 215, 21, 0, 224, 231, 5, 0, 176, 6, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 32, 0, 0, 0, 0, 0, 0, 0, 62, 0, 0, 0,
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1, 0, 0, 0, 2, 0, 0, 0, 144, 222, 21, 0, 144, 238, 5, 0,
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4, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 4, 0, 0, 0,
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0, 0, 0, 0, 72, 0, 0, 0, 1, 0, 0, 0, 2, 0, 0, 0,
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160, 222, 21, 0, 160, 238, 5, 0, 119, 23, 2, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 32, 0, 0, 0, 0, 0, 0, 0, 83, 0, 0, 0,
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7, 0, 0, 0, 2, 0, 0, 0, 32, 246, 23, 0, 32, 6, 8, 0,
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56, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 32, 0, 0, 0,
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0, 0, 0, 0, 100, 0, 0, 0, 1, 0, 0, 0, 3, 0, 0, 0,
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0, 0, 24, 0, 0, 16, 8, 0, 204, 5, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 16, 0, 0, 0, 0, 0, 0, 106, 0, 0, 0,
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1, 0, 0, 0, 3, 0, 0, 0, 224, 5, 24, 0, 224, 21, 8, 0,
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178, 9, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 32, 0, 0, 0,
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0, 0, 0, 0, 117, 0, 0, 0, 8, 0, 0, 0, 3, 4, 0, 0,
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148, 15, 24, 0, 146, 31, 8, 0, 4, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 4, 0, 0, 0, 0, 0, 0, 0, 123, 0, 0, 0,
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8, 0, 0, 0, 3, 0, 0, 0, 0, 16, 24, 0, 146, 31, 8, 0,
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176, 61, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 16, 0, 0,
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0, 0, 0, 0, 128, 0, 0, 0, 8, 0, 0, 0, 3, 0, 0, 0,
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192, 77, 25, 0, 146, 31, 8, 0, 32, 56, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 32, 0, 0, 0, 0, 0, 0, 0, 138, 0, 0, 0,
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1, 0, 0, 0, 0, 0, 0, 0, 224, 133, 25, 0, 146, 31, 8, 0,
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64, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0,
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0, 0, 0, 0, 153, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0,
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32, 134, 25, 0, 210, 31, 8, 0, 129, 26, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 169, 0, 0, 0,
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1, 0, 0, 0, 0, 0, 0, 0, 161, 160, 25, 0, 83, 58, 8, 0,
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2, 201, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0,
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0, 0, 0, 0, 181, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0,
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163, 105, 27, 0, 85, 3, 10, 0, 25, 1, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 195, 0, 0, 0,
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1, 0, 0, 0, 0, 0, 0, 0, 188, 106, 27, 0, 110, 4, 10, 0,
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67, 153, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0,
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0, 0, 0, 0, 207, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0,
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0, 4, 28, 0, 184, 157, 10, 0, 252, 112, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 8, 0, 0, 0, 0, 0, 0, 0, 220, 0, 0, 0,
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1, 0, 0, 0, 0, 0, 0, 0, 252, 116, 28, 0, 180, 14, 11, 0,
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16, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0,
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0, 0, 0, 0, 231, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0,
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12, 117, 28, 0, 196, 14, 11, 0, 239, 79, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 17, 0, 0, 0,
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3, 0, 0, 0, 0, 0, 0, 0, 251, 196, 28, 0, 179, 94, 11, 0,
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247, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0,
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0, 0, 0, 0, 1, 0, 0, 0, 2, 0, 0, 0, 0, 0, 0, 0,
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244, 197, 28, 0, 108, 99, 11, 0, 80, 77, 0, 0, 23, 0, 0, 0,
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210, 4, 0, 0, 4, 0, 0, 0, 16, 0, 0, 0, 9, 0, 0, 0,
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3, 0, 0, 0, 0, 0, 0, 0, 68, 19, 29, 0, 188, 176, 11, 0,
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107, 104, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 4, 0, 0, 0, 16, 0, 0, 0,
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127, 2, 0, 0, 128, 251, 1, 0, 5, 0, 0, 0, 20, 0, 0, 0,
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224, 0, 0, 0, 255, 255, 255, 255, 255, 255, 255, 255, 0, 0, 0, 0,
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8, 0, 0, 0, 32, 0, 0, 0, 0, 128, 11, 0, 0, 0, 0, 0,
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160, 0, 0, 0, 80, 0, 0, 0, 25, 0, 0, 0, 16, 2, 0, 0,
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14, 0, 0, 0, 28, 0, 0, 0, 82, 83, 68, 32, 80, 84, 82, 32,
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89, 66, 79, 67, 72, 83, 32, 0, 220, 24, 254, 7, 0, 0, 0, 0,
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0, 0, 0, 0, 8, 0, 0, 0,
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}
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)
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