bastion: initial implementation

ready project skeleton
dual-arch build system with Linux-config style configuration
UEFI EFI stub loader (PE32+) for x86_64 and AArch64
ELF64 kernel parser
Temporary framebuffer console
freestanding string and c++ abi stubs

For now, kernel boots, prints banner, memory map and go halt

1 files changed, 365 insertions, 0 deletions

diff --git a/include/boot/efi.h b/include/boot/efi.h
new file mode 100644
index 0000000..bcb8854
--- /dev/null
+++ b/include/boot/efi.h
@@ -0,0 +1,365 @@
+#pragma once
+// ============================================================================
+// efi.h - Minimal UEFI type and protocol definitions
+//
+// Only what we need for our boot loader. No external dependencies (like gnu-efi).
+// Reference: UEFI Specification 2.10, https://uefi.org/specs/UEFI/2.10/
+// I generate it with Cloude, because i don't want to manually rewrite whole spec
+// ============================================================================
+
+#include <stdint.h>
+#include <stddef.h>
+
+// ── Base types ─────────────────────────────────────────────────────────────
+
+typedef uint64_t        UINTN;
+typedef int64_t         INTN;
+typedef uint64_t        EFI_STATUS;
+typedef void*           EFI_HANDLE;
+typedef void*           EFI_EVENT;
+typedef uint64_t        EFI_PHYSICAL_ADDRESS;
+typedef uint64_t        EFI_VIRTUAL_ADDRESS;
+typedef wchar_t         CHAR16;  // With -fshort-wchar, wchar_t is 16-bit
+typedef uint8_t         BOOLEAN;
+
+#define TRUE  1
+#define FALSE 0
+#define IN
+#define OUT
+#define OPTIONAL
+#define EFIAPI
+
+// ── Status codes ───────────────────────────────────────────────────────────
+
+#define EFI_SUCCESS              0ULL
+#define EFI_ERROR_BIT            (1ULL << 63)
+#define EFI_LOAD_ERROR           (EFI_ERROR_BIT | 1)
+#define EFI_INVALID_PARAMETER    (EFI_ERROR_BIT | 2)
+#define EFI_UNSUPPORTED          (EFI_ERROR_BIT | 3)
+#define EFI_BAD_BUFFER_SIZE      (EFI_ERROR_BIT | 4)
+#define EFI_BUFFER_TOO_SMALL     (EFI_ERROR_BIT | 5)
+#define EFI_NOT_FOUND            (EFI_ERROR_BIT | 14)
+
+#define EFI_ERROR(status) ((status) & EFI_ERROR_BIT)
+
+// ── GUIDs ──────────────────────────────────────────────────────────────────
+
+struct EFI_GUID {
+    uint32_t Data1;
+    uint16_t Data2;
+    uint16_t Data3;
+    uint8_t  Data4[8];
+};
+
+#define EFI_GRAPHICS_OUTPUT_PROTOCOL_GUID \
+    { 0x9042A9DE, 0x23DC, 0x4A38, { 0x96, 0xFB, 0x7A, 0xDE, 0xD0, 0x80, 0x51, 0x6A } }
+
+#define EFI_SIMPLE_FILE_SYSTEM_PROTOCOL_GUID \
+    { 0x964E5B22, 0x6459, 0x11D2, { 0x8E, 0x39, 0x00, 0xA0, 0xC9, 0x69, 0x72, 0x3B } }
+
+#define EFI_LOADED_IMAGE_PROTOCOL_GUID \
+    { 0x5B1B31A1, 0x9562, 0x11D2, { 0x8E, 0x3F, 0x00, 0xA0, 0xC9, 0x69, 0x72, 0x3B } }
+
+#define EFI_FILE_INFO_ID \
+    { 0x09576E92, 0x6D3F, 0x11D2, { 0x8E, 0x39, 0x00, 0xA0, 0xC9, 0x69, 0x72, 0x3B } }
+
+#define EFI_ACPI_20_TABLE_GUID \
+    { 0x8868E871, 0xE4F1, 0x11D3, { 0xBC, 0x22, 0x00, 0x80, 0xC7, 0x3C, 0x88, 0x81 } }
+
+#define EFI_DTB_TABLE_GUID \
+    { 0xB1B621D5, 0xF19C, 0x41A5, { 0x83, 0x0B, 0xD9, 0x15, 0x2C, 0x69, 0xAA, 0xE0 } }
+
+// ── Memory types ───────────────────────────────────────────────────────────
+
+typedef uint32_t EFI_MEMORY_TYPE;
+#define EfiReservedMemoryType       0
+#define EfiLoaderCode               1
+#define EfiLoaderData               2
+#define EfiBootServicesCode         3
+#define EfiBootServicesData         4
+#define EfiRuntimeServicesCode      5
+#define EfiRuntimeServicesData      6
+#define EfiConventionalMemory       7
+#define EfiUnusableMemory           8
+#define EfiACPIReclaimMemory        9
+#define EfiACPIMemoryNVS            10
+#define EfiMemoryMappedIO           11
+#define EfiMemoryMappedIOPortSpace  12
+#define EfiPalCode                  13
+#define EfiPersistentMemory         14
+#define EfiMaxMemoryType            15
+
+typedef uint32_t EFI_ALLOCATE_TYPE;
+#define AllocateAnyPages    0
+#define AllocateMaxAddress  1
+#define AllocateAddress     2
+
+struct EFI_MEMORY_DESCRIPTOR {
+    uint32_t              Type;
+    EFI_PHYSICAL_ADDRESS  PhysicalStart;
+    EFI_VIRTUAL_ADDRESS   VirtualStart;
+    uint64_t              NumberOfPages;
+    uint64_t              Attribute;
+};
+
+// ── Simple Text Output Protocol ────────────────────────────────────────────
+
+struct EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL {
+    void* Reset;
+    EFI_STATUS (EFIAPI *OutputString)(
+        EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL* This,
+        CHAR16*                         String
+    );
+    void* TestString;
+    void* QueryMode;
+    void* SetMode;
+    void* SetAttribute;
+    EFI_STATUS (EFIAPI *ClearScreen)(
+        EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL* This
+    );
+    void* SetCursorPosition;
+    void* EnableCursor;
+    void* Mode;
+};
+
+// ── Graphics Output Protocol ───────────────────────────────────────────────
+
+typedef uint32_t EFI_GRAPHICS_PIXEL_FORMAT;
+#define PixelRedGreenBlueReserved8BitPerColor  0
+#define PixelBlueGreenRedReserved8BitPerColor  1
+#define PixelBitMask                           2
+#define PixelBltOnly                           3
+
+struct EFI_PIXEL_BITMASK {
+    uint32_t RedMask;
+    uint32_t GreenMask;
+    uint32_t BlueMask;
+    uint32_t ReservedMask;
+};
+
+struct EFI_GRAPHICS_OUTPUT_MODE_INFORMATION {
+    uint32_t                  Version;
+    uint32_t                  HorizontalResolution;
+    uint32_t                  VerticalResolution;
+    EFI_GRAPHICS_PIXEL_FORMAT PixelFormat;
+    EFI_PIXEL_BITMASK         PixelInformation;
+    uint32_t                  PixelsPerScanLine;
+};
+
+struct EFI_GRAPHICS_OUTPUT_PROTOCOL_MODE {
+    uint32_t                              MaxMode;
+    uint32_t                              Mode;
+    EFI_GRAPHICS_OUTPUT_MODE_INFORMATION* Info;
+    UINTN                                 SizeOfInfo;
+    EFI_PHYSICAL_ADDRESS                  FrameBufferBase;
+    UINTN                                 FrameBufferSize;
+};
+
+struct EFI_GRAPHICS_OUTPUT_PROTOCOL {
+    void*                              QueryMode;
+    void*                              SetMode;
+    void*                              Blt;
+    EFI_GRAPHICS_OUTPUT_PROTOCOL_MODE* Mode;
+};
+
+// ── File Protocol ──────────────────────────────────────────────────────────
+
+#define EFI_FILE_MODE_READ   0x0000000000000001ULL
+#define EFI_FILE_READ_ONLY   0x0000000000000001ULL
+
+struct EFI_FILE_PROTOCOL {
+    uint64_t Revision;
+    EFI_STATUS (EFIAPI *Open)(
+        EFI_FILE_PROTOCOL*  This,
+        EFI_FILE_PROTOCOL** NewHandle,
+        CHAR16*             FileName,
+        uint64_t            OpenMode,
+        uint64_t            Attributes
+    );
+    EFI_STATUS (EFIAPI *Close)(
+        EFI_FILE_PROTOCOL* This
+    );
+    void* Delete;
+    EFI_STATUS (EFIAPI *Read)(
+        EFI_FILE_PROTOCOL* This,
+        UINTN*             BufferSize,
+        void*              Buffer
+    );
+    void* Write;
+    void* GetPosition;
+    void* SetPosition;
+    EFI_STATUS (EFIAPI *GetInfo)(
+        EFI_FILE_PROTOCOL* This,
+        EFI_GUID*          InformationType,
+        UINTN*             BufferSize,
+        void*              Buffer
+    );
+};
+
+struct EFI_FILE_INFO {
+    uint64_t Size;
+    uint64_t FileSize;
+    uint64_t PhysicalSize;
+    uint8_t  _time_padding[48];  // Skip EFI_TIME fields
+    uint64_t Attribute;
+    CHAR16   FileName[1];        // Variable length
+};
+
+// ── Simple File System Protocol ────────────────────────────────────────────
+
+struct EFI_SIMPLE_FILE_SYSTEM_PROTOCOL {
+    uint64_t Revision;
+    EFI_STATUS (EFIAPI *OpenVolume)(
+        EFI_SIMPLE_FILE_SYSTEM_PROTOCOL* This,
+        EFI_FILE_PROTOCOL**              Root
+    );
+};
+
+// ── Loaded Image Protocol ──────────────────────────────────────────────────
+
+struct EFI_LOADED_IMAGE_PROTOCOL {
+    uint32_t   Revision;
+    EFI_HANDLE ParentHandle;
+    void*      SystemTable;
+    EFI_HANDLE DeviceHandle;
+    void*      FilePath;
+    void*      Reserved;
+    uint32_t   LoadOptionsSize;
+    void*      LoadOptions;
+    void*      ImageBase;
+    uint64_t   ImageSize;
+    EFI_MEMORY_TYPE ImageCodeType;
+    EFI_MEMORY_TYPE ImageDataType;
+    void*      Unload;
+};
+
+// ── Boot Services ──────────────────────────────────────────────────────────
+
+struct EFI_BOOT_SERVICES {
+    char _hdr[24];
+
+    // Task Priority (2)
+    void* RaiseTPL;
+    void* RestoreTPL;
+
+    // Memory Services
+    EFI_STATUS (EFIAPI *AllocatePages)(
+        EFI_ALLOCATE_TYPE      Type,
+        EFI_MEMORY_TYPE        MemoryType,
+        UINTN                  Pages,
+        EFI_PHYSICAL_ADDRESS*  Memory
+    );
+    EFI_STATUS (EFIAPI *FreePages)(
+        EFI_PHYSICAL_ADDRESS Memory,
+        UINTN                Pages
+    );
+    EFI_STATUS (EFIAPI *GetMemoryMap)(
+        UINTN*                  MemoryMapSize,
+        EFI_MEMORY_DESCRIPTOR*  MemoryMap,
+        UINTN*                  MapKey,
+        UINTN*                  DescriptorSize,
+        uint32_t*               DescriptorVersion
+    );
+    EFI_STATUS (EFIAPI *AllocatePool)(
+        EFI_MEMORY_TYPE PoolType,
+        UINTN           Size,
+        void**          Buffer
+    );
+    EFI_STATUS (EFIAPI *FreePool)(
+        void* Buffer
+    );
+
+    // Event & Timer (6)
+    void* CreateEvent;
+    void* SetTimer;
+    void* WaitForEvent;
+    void* SignalEvent;
+    void* CloseEvent;
+    void* CheckEvent;
+
+    // Protocol Handler (6 + 3)
+    void* InstallProtocolInterface;
+    void* ReinstallProtocolInterface;
+    void* UninstallProtocolInterface;
+    EFI_STATUS (EFIAPI *HandleProtocol)(
+        EFI_HANDLE Handle,
+        EFI_GUID*  Protocol,
+        void**     Interface
+    );
+    void* Reserved;
+    void* RegisterProtocolNotify;
+    void* LocateHandle;
+    void* LocateDevicePath;
+    void* InstallConfigurationTable;
+
+    // Image Services (5)
+    void* LoadImage;
+    void* StartImage;
+    void* Exit;
+    void* UnloadImage;
+    EFI_STATUS (EFIAPI *ExitBootServices)(
+        EFI_HANDLE ImageHandle,
+        UINTN      MapKey
+    );
+
+    // Misc (3)
+    void* GetNextMonotonicCount;
+    void* Stall;
+    void* SetWatchdogTimer;
+
+    // DriverSupport (2)
+    void* ConnectController;
+    void* DisconnectController;
+
+    // Open/Close Protocol (3)
+    void* OpenProtocol;
+    void* CloseProtocol;
+    void* OpenProtocolInformation;
+
+    // Library (3)
+    void* ProtocolsPerHandle;
+    void* LocateHandleBuffer;
+    EFI_STATUS (EFIAPI *LocateProtocol)(
+        EFI_GUID* Protocol,
+        void*     Registration,
+        void**    Interface
+    );
+};
+
+// ── Configuration Table ────────────────────────────────────────────────────
+
+struct EFI_CONFIGURATION_TABLE {
+    EFI_GUID VendorGuid;
+    void*    VendorTable;
+};
+
+// ── System Table ───────────────────────────────────────────────────────────
+
+struct EFI_SYSTEM_TABLE {
+    char _hdr[24];
+
+    CHAR16*                          FirmwareVendor;
+    uint32_t                         FirmwareRevision;
+    uint32_t                         _pad;
+
+    EFI_HANDLE                       ConsoleInHandle;
+    void*                            ConIn;
+    EFI_HANDLE                       ConsoleOutHandle;
+    EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL*  ConOut;
+    EFI_HANDLE                       StandardErrorHandle;
+    void*                            StdErr;
+    void*                            RuntimeServices;
+    EFI_BOOT_SERVICES*               BootServices;
+    UINTN                            NumberOfTableEntries;
+    EFI_CONFIGURATION_TABLE*         ConfigurationTable;
+};
+
+// ── Utility ────────────────────────────────────────────────────────────────
+
+inline bool guid_equal(const EFI_GUID& a, const EFI_GUID& b) {
+    return a.Data1 == b.Data1 && a.Data2 == b.Data2 && a.Data3 == b.Data3 &&
+           a.Data4[0] == b.Data4[0] && a.Data4[1] == b.Data4[1] &&
+           a.Data4[2] == b.Data4[2] && a.Data4[3] == b.Data4[3] &&
+           a.Data4[4] == b.Data4[4] && a.Data4[5] == b.Data4[5] &&
+           a.Data4[6] == b.Data4[6] && a.Data4[7] == b.Data4[7];
+}