Add x86_64 kernel bring-up with build-selected platform adapters
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/* Copyright 2026 Aaron Hance
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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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* http://www.apache.org/licenses/LICENSE-2.0
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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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*/
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OUTPUT_FORMAT(elf64-x86-64)
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ENTRY(loader)
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SECTIONS
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{
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/* Bootstrap-only low mapping. Final kernel address-space policy is a
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separate milestone; do not inherit the i386 0xC0000000 offset. */
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. = 0x100000;
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kernel_start = .;
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.multiboot : { KEEP(*(.multiboot)) }
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.text ALIGN(4096) : { *(.text .text.*) }
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.rodata ALIGN(4096) : { *(.rodata .rodata.*) }
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.data ALIGN(4096) : { *(.data .data.*) }
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load_end = .;
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.bss ALIGN(4096) (NOLOAD) : { *(COMMON) *(.bss .bss.*) }
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. = ALIGN(4096);
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kernel_end = .;
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ASSERT(kernel_end < 0x100000000, "Bootstrap must fit below 4 GiB")
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/DISCARD/ : { *(.comment) *(.note*) *(.eh_frame*) }
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}
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# Copyright 2026 Aaron Hance
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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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# http://www.apache.org/licenses/LICENSE-2.0
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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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# Run from the workspace root after building the selected ASURO_BOOT_TEST.
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# Restore temporary optical medium and optional RAM changes after the test.
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param(
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[ValidateSet('none', 'ud', 'pf', 'df')][string]$Test = 'none',
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[ValidateRange(0, 8192)][int]$MemoryMB = 0,
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[string]$Controller = 'AHCI',
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[int]$Port = 1,
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[int]$Device = 0,
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[ValidateRange(5, 45)][int]$TimeoutSeconds = 35
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)
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$ErrorActionPreference = 'Stop'
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$config = Get-Content -LiteralPath .\localenv.json -Raw | ConvertFrom-Json
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$vm = $config.virtualbox.MachineName
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$serialPath = $config.virtualbox.LogLocation
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if (-not $serialPath) { throw 'VirtualBox serial LogLocation is required.' }
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$isoPath = (Resolve-Path -LiteralPath .\Asuro-x86_64.iso).Path
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$state = & VBoxManage.exe showvminfo $vm --machinereadable
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if ($LASTEXITCODE -ne 0) { throw 'Cannot inspect VirtualBox VM.' }
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if ($state -notcontains 'VMState="poweroff"') {
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throw 'The configured VM must already be powered off before boot validation.'
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}
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$mediumKey = '"{0}-{1}-{2}"=' -f $Controller, $Port, $Device
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$mediumLine = @($state | Where-Object { $_.StartsWith($mediumKey) })
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if ($mediumLine.Count -ne 1) { throw 'Cannot identify original optical medium.' }
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$originalMedium = $mediumLine[0].Substring($mediumKey.Length).Trim('"').Replace('\\', '\')
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if ($originalMedium -notin @('none', 'emptydrive') -and $originalMedium -notmatch '(?i)\.iso$') {
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throw 'Selected port is not an ISO/empty optical drive; refusing to replace it.'
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}
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if ($originalMedium -eq 'none') { $originalMedium = 'emptydrive' }
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$evidence = Join-Path (Get-Location) 'bin\x86_64'
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New-Item -ItemType Directory -Path $evidence -Force | Out-Null
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$originalMemory = [int](($state | Where-Object { $_ -match '^memory=' }) -replace '^memory=', '')
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if ($originalMemory -le 0) { throw 'Cannot identify original VM RAM size.' }
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$started = $false
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try {
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if ($MemoryMB -ne 0) {
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& VBoxManage.exe modifyvm $vm --memory $MemoryMB
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if ($LASTEXITCODE -ne 0) { throw 'Cannot set test RAM size.' }
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}
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& VBoxManage.exe storageattach $vm --storagectl $Controller --port $Port --device $Device --type dvddrive --medium $isoPath
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if ($LASTEXITCODE -ne 0) { throw 'Cannot attach bootstrap ISO.' }
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& .\virtualbox-wrapper.ps1 -command up -Headless -NoMonitor
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if ($LASTEXITCODE -ne 0) { throw 'Cannot start test VM.' }
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$started = $true
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$deadline = [DateTime]::UtcNow.AddSeconds($TimeoutSeconds)
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$output = ''
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$marker = if ($Test -eq 'none') { 'bootstrap complete; interrupts disabled' } else { 'HALTED: exception diagnostics complete' }
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do {
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if (Test-Path -LiteralPath $serialPath) {
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$output = Get-Content -LiteralPath $serialPath -Raw
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}
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if ($output -and ($output.Contains($marker) -or $output.Contains('FAIL:'))) { break }
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Start-Sleep -Milliseconds 200
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} while ([DateTime]::UtcNow -lt $deadline)
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$output | Set-Content -LiteralPath (Join-Path $evidence "boot-$Test-$MemoryMB.log")
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& VBoxManage.exe debugvm $vm getregisters rip rsp cs cr0 cr2 cr3 cr4 efer tr |
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Set-Content -LiteralPath (Join-Path $evidence "registers-$Test-$MemoryMB.log")
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if ($LASTEXITCODE -ne 0) { throw 'Cannot capture CPU registers.' }
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Write-Output $output
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if (-not $output -or -not $output.Contains($marker) -or $output.Contains('FAIL:')) {
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throw 'Boot did not reach its expected completion marker.'
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}
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foreach ($required in @('EXCEPTION_TESTS_PASSED=0000000000000002', 'EXCEPTION_TESTS_FAILED=0000000000000000',
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'PMM_TESTS_FAILED=0000000000000000', 'VMM_TESTS_FAILED=0000000000000000',
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'HEAP_TESTS_FAILED=0000000000000000', 'IRQ_TESTS_FAILED=0000000000000000', 'CONTEXT_TESTS_FAILED=0000000000000000', 'PROCESS_TESTS_FAILED=0000000000000000', 'FD_TESTS_FAILED=0000000000000000', 'STRINGS_TESTS_FAILED=0000000000000000', 'STDIO_TESTS_FAILED=0000000000000000')) {
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if (-not $output.Contains($required)) { throw "Missing check: $required" }
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}
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if ($MemoryMB -gt 4096 -and $output.Contains('SKIP: no available physical RAM above 4 GiB')) {
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throw 'High physical memory test was skipped.'
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}
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if ($Test -ne 'none') {
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$vector = @{ud = '6'; pf = 'E'; df = '8'}[$Test]
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$errorCode = if ($Test -eq 'pf') { '2' } else { '0' }
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foreach ($required in @("VECTOR=000000000000000$vector", "ERROR=000000000000000$errorCode", 'CS=0000000000000018')) {
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if (-not $output.Contains($required)) { throw "Missing diagnostic: $required" }
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}
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if ($Test -eq 'pf' -and -not $output.Contains('CR2=0000000100000000')) {
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throw 'Page fault did not preserve the expected CR2.'
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}
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if ($Test -eq 'df' -and (-not $output.Contains('STACK=double-fault IST1') -or
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-not $output.Contains('RSP=0000000100001000'))) {
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throw 'Double fault did not switch from the broken stack to IST1.'
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}
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}
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Write-Output "PASS: VirtualBox x86_64 boot test '$Test'"
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} finally {
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try {
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if ($started) {
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& .\virtualbox-wrapper.ps1 -command down
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if ($LASTEXITCODE -ne 0) { throw 'Cannot stop test VM.' }
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}
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} finally {
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& VBoxManage.exe storageattach $vm --storagectl $Controller --port $Port --device $Device --type dvddrive --medium $originalMedium
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if ($LASTEXITCODE -ne 0) { throw 'Cannot restore original optical medium.' }
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if ($MemoryMB -ne 0) {
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& VBoxManage.exe modifyvm $vm --memory $originalMemory
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if ($LASTEXITCODE -ne 0) { throw 'Cannot restore original VM RAM size.' }
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}
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}
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}
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