ゼロからのOS自作入門をやってみた時のメモ：環境構築 ~ 2章まで

struct MemoryMap {
  UINTN buffer_size;
  VOID* buffer;
  UINTN map_size;
  UINTN map_key;
  UINTN descriptor_size;
  UINT32 descriptor_version;
};

EFI_STATUS GetMemoryMap(struct MemoryMap* map) {
  if (map->buffer == NULL) {
    return EFI_BUFFER_TOO_SMALL;
  }

  map->map_size = map->buffer_size;
  return gBS->GetMemoryMap(
      &map->map_size,
      (EFI_MEMORY_DESCRIPTOR*)map->buffer,
      &map->map_key,
      &map->descriptor_size,
      &map->descriptor_version);
}

///
/// Memory descriptor version number.
///
#define EFI_MEMORY_DESCRIPTOR_VERSION 1

///
/// Definition of an EFI memory descriptor.
///
typedef struct {
  ///
  /// Type of the memory region.
  /// Type EFI_MEMORY_TYPE is defined in the
  /// AllocatePages() function description.
  ///
  UINT32                Type;
  ///
  /// Physical address of the first byte in the memory region. PhysicalStart must be
  /// aligned on a 4 KiB boundary, and must not be above 0xfffffffffffff000. Type
  /// EFI_PHYSICAL_ADDRESS is defined in the AllocatePages() function description
  ///
  EFI_PHYSICAL_ADDRESS  PhysicalStart;
  ///
  /// Virtual address of the first byte in the memory region.
  /// VirtualStart must be aligned on a 4 KiB boundary,
  /// and must not be above 0xfffffffffffff000.
  ///
  EFI_VIRTUAL_ADDRESS   VirtualStart;
  ///
  /// NumberOfPagesNumber of 4 KiB pages in the memory region.
  /// NumberOfPages must not be 0, and must not be any value
  /// that would represent a memory page with a start address,
  /// either physical or virtual, above 0xfffffffffffff000.
  ///
  UINT64                NumberOfPages;
  ///
  /// Attributes of the memory region that describe the bit mask of capabilities
  /// for that memory region, and not necessarily the current settings for that
  /// memory region.
  ///
  UINT64                Attribute;
} EFI_MEMORY_DESCRIPTOR;

mkdir -o mnt
sudo mount -o loop disk.img mnt
cat mnt/memmap

//終わったら
unmount mnt

Index, Type, Type(name), PhysicalStart, NumberOfPages, Attribute
0, 3, EfiBootServicesCode, 00000000, 1, F
1, 7, EfiConventionalMemory, 00001000, 9F, F
2, 7, EfiConventionalMemory, 00100000, 700, F
3, A, EfiACPIMemoryNVS, 00800000, 8, F
4, 7, EfiConventionalMemory, 00808000, 8, F
5, A, EfiACPIMemoryNVS, 00810000, F0, F
6, 4, EfiBootServicesData, 00900000, B00, F
7, 7, EfiConventionalMemory, 01400000, 3AB36, F
8, 4, EfiBootServicesData, 3BF36000, 20, F
9, 7, EfiConventionalMemory, 3BF56000, 270C, F
10, 1, EfiLoaderCode, 3E662000, 2, F
11, 4, EfiBootServicesData, 3E664000, 219, F
12, 3, EfiBootServicesCode, 3E87D000, B7, F
13, A, EfiACPIMemoryNVS, 3E934000, 12, F
14, 0, EfiReservedMemoryType, 3E946000, 1C, F
15, 3, EfiBootServicesCode, 3E962000, 10A, F
16, 6, EfiRuntimeServicesData, 3EA6C000, 5, F
17, 5, EfiRuntimeServicesCode, 3EA71000, 5, F
18, 6, EfiRuntimeServicesData, 3EA76000, 5, F
19, 5, EfiRuntimeServicesCode, 3EA7B000, 5, F
20, 6, EfiRuntimeServicesData, 3EA80000, 5, F
21, 5, EfiRuntimeServicesCode, 3EA85000, 7, F
22, 6, EfiRuntimeServicesData, 3EA8C000, 8F, F
23, 4, EfiBootServicesData, 3EB1B000, 4DA, F
24, 7, EfiConventionalMemory, 3EFF5000, 4, F
25, 4, EfiBootServicesData, 3EFF9000, 6, F
26, 7, EfiConventionalMemory, 3EFFF000, 1, F
27, 4, EfiBootServicesData, 3F000000, A1B, F
28, 7, EfiConventionalMemory, 3FA1B000, 1, F
29, 3, EfiBootServicesCode, 3FA1C000, 17F, F
30, 5, EfiRuntimeServicesCode, 3FB9B000, 30, F
31, 6, EfiRuntimeServicesData, 3FBCB000, 24, F
32, 0, EfiReservedMemoryType, 3FBEF000, 4, F
33, 9, EfiACPIReclaimMemory, 3FBF3000, 8, F
34, A, EfiACPIMemoryNVS, 3FBFB000, 4, F
35, 4, EfiBootServicesData, 3FBFF000, 201, F
36, 7, EfiConventionalMemory, 3FE00000, 8D, F
37, 4, EfiBootServicesData, 3FE8D000, 20, F
38, 3, EfiBootServicesCode, 3FEAD000, 20, F
39, 4, EfiBootServicesData, 3FECD000, 9, F
40, 3, EfiBootServicesCode, 3FED6000, 1E, F
41, 6, EfiRuntimeServicesData, 3FEF4000, 84, F
42, A, EfiACPIMemoryNVS, 3FF78000, 88, F
43, 6, EfiRuntimeServicesData, FFC00000, 400, 1

#  PROPERTY              Type       Use         Description
#  ----------------      --------   --------    -----------------------------------------------------------
#  ACTIVE_PLATFORM       Filename   Recommended Specify the WORKSPACE relative Path and Filename
#                                               of the platform description file that will be used for the
#                                               build. This line is required if and only if the current
#                                               working directory does not contain one or more description
#                                               files.
ACTIVE_PLATFORM       = OSLoaderPkg/OSLoaderPkg.dsc

#@range_begin(defines)
[Defines]
  PLATFORM_NAME                  = OSLoaderPkg
  PLATFORM_GUID                  = d3f11f4e-71e9-11e8-a7e1-33fd4f7d5a3e
  PLATFORM_VERSION               = 0.1
  DSC_SPECIFICATION              = 0x00010005
  OUTPUT_DIRECTORY               = Build/OSLoader$(ARCH)
  SUPPORTED_ARCHITECTURES        = X64
  BUILD_TARGETS                  = DEBUG|RELEASE|NOOPT
#@range_end(defines)

#@range_begin(library_classes)
[LibraryClasses]
  UefiApplicationEntryPoint|MdePkg/Library/UefiApplicationEntryPoint/UefiApplicationEntryPoint.inf
  UefiLib|MdePkg/Library/UefiLib/UefiLib.inf
#@range_end(library_classes)

  BaseLib|MdePkg/Library/BaseLib/BaseLib.inf
  BaseMemoryLib|MdePkg/Library/BaseMemoryLib/BaseMemoryLib.inf
  DebugLib|MdePkg/Library/BaseDebugLibNull/BaseDebugLibNull.inf
  DevicePathLib|MdePkg/Library/UefiDevicePathLib/UefiDevicePathLib.inf
  MemoryAllocationLib|MdePkg/Library/UefiMemoryAllocationLib/UefiMemoryAllocationLib.inf
  PcdLib|MdePkg/Library/BasePcdLibNull/BasePcdLibNull.inf
  PrintLib|MdePkg/Library/BasePrintLib/BasePrintLib.inf
  UefiBootServicesTableLib|MdePkg/Library/UefiBootServicesTableLib/UefiBootServicesTableLib.inf
  UefiRuntimeServicesTableLib|MdePkg/Library/UefiRuntimeServicesTableLib/UefiRuntimeServicesTableLib.inf

#@range_begin(components)
[Components]
  OSLoaderPkg/Loader.inf
#@range_end(components)

#!/bin/sh -ex

if [ $# -lt 1 ]
then
    echo "Usage: $0 <.efi file> [another file]"
    exit 1
fi

DEVENV_DIR=$(dirname "$0")
EFI_FILE=$1
ANOTHER_FILE=$2
DISK_IMG=./disk.img
MOUNT_POINT=./mnt

$DEVENV_DIR/make_image.sh $DISK_IMG $MOUNT_POINT $EFI_FILE $ANOTHER_FILE
$DEVENV_DIR/run_image.sh $DISK_IMG

#!/bin/sh -ex

if [ $# -lt 3 ]
then
    echo "Usage: $0 <image name> <mount point> <.efi file> [another file]"
    exit 1
fi

DEVENV_DIR=$(dirname "$0")
DISK_IMG=$1
MOUNT_POINT=$2
EFI_FILE=$3
ANOTHER_FILE=$4

if [ ! -f $EFI_FILE ]
then
    echo "No such file: $EFI_FILE"
    exit 1
fi

rm -f $DISK_IMG
qemu-img create -f raw $DISK_IMG 200M
mkfs.fat -n 'JISAKU OS' -s 2 -f 2 -R 32 -F 32 $DISK_IMG

$DEVENV_DIR/mount_image.sh $DISK_IMG $MOUNT_POINT
sudo mkdir -p $MOUNT_POINT/EFI/BOOT
sudo cp $EFI_FILE $MOUNT_POINT/EFI/BOOT/BOOTX64.EFI
if [ "$ANOTHER_FILE" != "" ]
then
    sudo cp $ANOTHER_FILE $MOUNT_POINT/
fi
sleep 0.5
sudo umount $MOUNT_POINT

qemu-system-x86_64 \
    -m 1G \
    -drive if=pflash,format=raw,readonly,file=$DEVENV_DIR/OVMF_CODE.fd \
    -drive if=pflash,format=raw,file=$DEVENV_DIR/OVMF_VARS.fd \
    -drive if=ide,index=0,media=disk,format=raw,file=$DISK_IMG \
    -device nec-usb-xhci,id=xhci \
    -device usb-mouse -device usb-kbd \
    -monitor stdio \
    $QEMU_OPTS