Makefile + fixed GetMemMap + updated readme
This commit is contained in:
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925aa01c9b
commit
9c3495c98a
5 changed files with 367 additions and 5 deletions
8
Makefile
Normal file
8
Makefile
Normal file
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@ -0,0 +1,8 @@
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bootefi.efi: bootefi.asm uefi.inc
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fasm bootefi.asm
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run: bootefi.efi
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uefi-run bootefi.efi -b /usr/share/ovmf/x64/OVMF.4m.fd
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clean: bootefi.efi
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rm bootefi.efi
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13
README
Normal file
13
README
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@ -0,0 +1,13 @@
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FlatEFILoader
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=============
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FEFIL is a simple EFI bootloader written in flatassembler. It tries to be
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understandable by mere mortals
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TODO
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====
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- [X] Make GetMemoryMap and ExitBootServices work
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- [ ] Get GOP frame buffer and load it to arbitrary memory space
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- [ ] Indicate boot success with frame buffer
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- [ ] EDID multiple screens and their resolution
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@ -1,3 +0,0 @@
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# FlatEFILoader
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FEFIL is a EFI bootloader written in flatassembler
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22
bootefi.asm
22
bootefi.asm
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@ -60,7 +60,21 @@ main:
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mov rdx, BootMsg
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call print
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;.GetGOP:
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; mov rcx, EFI_GRAPHICS_OUTPUT_UUID
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; mov rdx, 3
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; mov r8, Video
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;
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; mov rax, [BootSrvc]
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; call_safe [rax + EFI_BOOT_SERVICES_TABLE.LocateProtocol]
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;
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; cmp rax, EFI_SUCCES
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; jne .error
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;
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; mov rax, [Video]
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; mov rbx, [rax + EFI_GRAPHICS_OUTPUT_PROTOCOL_MODE.MaxMode]
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; jmp .
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; TODO: Get and store framebuffer
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; Getting the memory map is kind of harder (not in this case), normally
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@ -76,6 +90,8 @@ main:
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; *MemMapDescSize,
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; *MemMapDescVer)
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.GetMemMap:
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mov rax, [BootSrvc]
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lea rcx, [MemMapSize]
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mov rdx, [MemMapBuff]
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lea r8, [MemMapKey]
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@ -85,7 +101,7 @@ main:
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lea r10, [MemMapDescVer]
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mov [rsp+32], r10
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call [BootSrvc + EFI_BOOT_SERVICES_TABLE.GetMemoryMap]
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call [rax + EFI_BOOT_SERVICES_TABLE.GetMemoryMap]
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; if it returns buffer too small run the function again as it filled out
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; the needed buffer length
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@ -106,7 +122,8 @@ main:
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mov rcx, [ImgHdl]
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mov rdx, [MemMapKey]
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call_safe [BootSrvc + EFI_BOOT_SERVICES_TABLE.ExitBootServices]
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mov rax, [BootSrvc]
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call_safe [rax + EFI_BOOT_SERVICES_TABLE.ExitBootServices]
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cmp rax, EFI_SUCCESS
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jne .error
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@ -138,6 +155,7 @@ ImgHdl dq ?
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SysTbl dq ?
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BootSrvc dq ?
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Output dq ?
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Video dq ?
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MemMapSize dq 32768
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MemMapKey dq ?
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326
uefi.inc
Normal file
326
uefi.inc
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@ -0,0 +1,326 @@
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;*********************************************************************
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;* *
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;* UEFI library for fasm by bzt, Public Domain *
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;* *
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;*********************************************************************
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; include x86asm.net's efi.inc
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;include 'efi.inc'
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struc int8 {
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. db ?
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}
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struc int16 {
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align 2
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. dw ?
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}
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struc int32 {
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align 4
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. dd ?
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}
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struc int64 {
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align 8
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. dq ?
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}
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struc intn {
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align 8
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. dq ?
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}
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struc dptr {
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align 8
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. dq ?
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}
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;symbols
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; EFIERR = 0x8000000000000000
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EFI_SUCCESS = 0
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EFI_LOAD_ERROR = 1 ;or EFIERR
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EFI_INVALID_PARAMETER = 2 ;or EFIERR
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EFI_UNSUPPORTED = 3;or EFIERR
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EFI_BAD_BUFFER_SIZE = 4;or EFIERR
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EFI_BUFFER_TOO_SMALL = 5;or EFIERR
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EFI_NOT_READY = 6;or EFIERR
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EFI_DEVICE_ERROR = 7;or EFIERR
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EFI_WRITE_PROTECTED = 8;or EFIERR
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EFI_OUT_OF_RESOURCES = 9;or EFIERR
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EFI_VOLUME_CORRUPTED = 10;or EFIERR
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EFI_VOLUME_FULL = 11;or EFIERR
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EFI_NO_MEDIA = 12;or EFIERR
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EFI_MEDIA_CHANGED = 13;or EFIERR
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EFI_NOT_FOUND = 14;or EFIERR
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EFI_ACCESS_DENIED = 15;or EFIERR
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EFI_NO_RESPONSE = 16;or EFIERR
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EFI_NO_MAPPING = 17;or EFIERR
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EFI_TIMEOUT = 18;or EFIERR
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EFI_NOT_STARTED = 19;or EFIERR
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EFI_ALREADY_STARTED = 20;or EFIERR
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EFI_ABORTED = 21;or EFIERR
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EFI_ICMP_ERROR = 22;or EFIERR
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EFI_TFTP_ERROR = 23;or EFIERR
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EFI_PROTOCOL_ERROR = 24;or EFIERR
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; ConOut Colors :)
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EFI_BLACK = 0x00
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EFI_BLUE = 0x01
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EFI_GREEN = 0x02
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EFI_CYAN = 0x03
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EFI_RED = 0x04
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EFI_MAGENTA = 0x05
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EFI_BROWN = 0x06
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EFI_LIGHTGRAY = 0x07
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EFI_BRIGHT = 0x08
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EFI_DARKGRAY = 0x08
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EFI_LIGHTBLUE = 0x09
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EFI_LIGHTGREEN = 0x0A
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EFI_LIGHTCYAN = 0x0B
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EFI_LIGHTRED = 0x0C
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EFI_LIGHTMAGENTA = 0x0D
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EFI_YELLOW = 0x0E
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EFI_WHITE = 0x0F
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EFI_BACKGROUND_BLACK = 0x00
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EFI_BACKGROUND_BLUE = 0x10
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EFI_BACKGROUND_GREEN = 0x20
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EFI_BACKGROUND_CYAN = 0x30
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EFI_BACKGROUND_RED = 0x40
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EFI_BACKGROUND_MAGENTA = 0x50
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EFI_BACKGROUND_BROWN = 0x60
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EFI_BACKGROUND_LIGHTGRAY = 0x70
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;helper macro for definition of relative structure member offsets
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macro struct name
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{
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virtual at 0
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name name
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end virtual
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}
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;structures
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EFI_SYSTEM_TABLE_SIGNATURE equ 49h,42h,49h,20h,53h,59h,53h,54h
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struc EFI_TABLE_HEADER {
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.Signature int64
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.Revision int32
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.HeaderSize int32
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.CRC32 int32
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.Reserved int32
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}
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struct EFI_TABLE_HEADER
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struc EFI_SYSTEM_TABLE {
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.Hdr EFI_TABLE_HEADER
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.FirmwareVendor dptr
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.FirmwareRevision int32
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.ConsoleInHandle dptr
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.ConIn dptr
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.ConsoleOutHandle dptr
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.ConOut dptr
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.StandardErrorHandle dptr
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.StdErr dptr
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.RuntimeServices dptr
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.BootServices dptr
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.NumberOfTableEntries intn
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.ConfigurationTable dptr
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}
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struct EFI_SYSTEM_TABLE
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struc SIMPLE_TEXT_OUTPUT_INTERFACE {
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.Reset dptr
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.OutputString dptr
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.TestString dptr
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.QueryMode dptr
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.SetMode dptr
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.SetAttribute dptr
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.ClearScreen dptr
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.SetCursorPosition dptr
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.EnableCursor dptr
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.Mode dptr
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}
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struct SIMPLE_TEXT_OUTPUT_INTERFACE
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;---include ends
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struc SIMPLE_INPUT_INTERFACE {
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.Reset dptr
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.ReadKeyStroke dptr
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.WaitForKey dptr
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}
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struct SIMPLE_INPUT_INTERFACE
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struc EFI_BOOT_SERVICES_TABLE {
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.Hdr EFI_TABLE_HEADER
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.RaisePriority dptr
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.RestorePriority dptr
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.AllocatePages dptr
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.FreePages dptr
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.GetMemoryMap dptr
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.AllocatePool dptr
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.FreePool dptr
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.CreateEvent dptr
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.SetTimer dptr
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.WaitForEvent dptr
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.SignalEvent dptr
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.CloseEvent dptr
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.CheckEvent dptr
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.InstallProtocolInterface dptr
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.ReInstallProtocolInterface dptr
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.UnInstallProtocolInterface dptr
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.HandleProtocol dptr
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.Void dptr
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.RegisterProtocolNotify dptr
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.LocateHandle dptr
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.LocateDevicePath dptr
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.InstallConfigurationTable dptr
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.ImageLoad dptr
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.ImageStart dptr
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.Exit dptr
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.ImageUnLoad dptr
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.ExitBootServices dptr
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.GetNextMonotonicCount dptr
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.Stall dptr
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.SetWatchdogTimer dptr
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.ConnectController dptr
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.DisConnectController dptr
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.OpenProtocol dptr
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.CloseProtocol dptr
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.OpenProtocolInformation dptr
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.ProtocolsPerHandle dptr
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.LocateHandleBuffer dptr
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.LocateProtocol dptr
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.InstallMultipleProtocolInterfaces dptr
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.UnInstallMultipleProtocolInterfaces dptr
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.CalculateCrc32 dptr
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.CopyMem dptr
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.SetMem dptr
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}
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struct EFI_BOOT_SERVICES_TABLE
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struc EFI_RUNTIME_SERVICES_TABLE {
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.Hdr EFI_TABLE_HEADER
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.GetTime dptr
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.SetTime dptr
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.GetWakeUpTime dptr
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.SetWakeUpTime dptr
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.SetVirtualAddressMap dptr
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.ConvertPointer dptr
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.GetVariable dptr
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.GetNextVariableName dptr
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.SetVariable dptr
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.GetNextHighMonoCount dptr
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.ResetSystem dptr
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}
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struct EFI_RUNTIME_SERVICES_TABLE
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struc EFI_TIME {
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.Year int16
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.Month int8
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.Day int8
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.Hour int8
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.Minute int8
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.Second int8
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.Pad1 int8
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.Nanosecond int32
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.TimeZone int16
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.Daylight int8
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.Pad2 int8
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.sizeof rb 1
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}
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struct EFI_TIME
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EFI_LOADED_IMAGE_PROTOCOL_UUID equ 0A1h,31h,1bh,5bh,62h,95h,0d2h,11h,8Eh,3Fh,0h,0A0h,0C9h,69h,72h,3Bh
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struc EFI_LOADED_IMAGE_PROTOCOL {
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.Revision int32
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.ParentHandle int64
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.SystemTable dptr
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.DeviceHandle int64
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.FilePath dptr
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.Reserved int64
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.LoadOptionsSize int32
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.ImageBase dptr
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.ImageSize int64
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.ImageCodeType int32
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.ImageDataType int32
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.UnLoad dptr
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}
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struct EFI_LOADED_IMAGE_PROTOCOL
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EFI_BLOCK_IO_PROTOCOL_UUID equ 21h,5bh,4eh,96h,59h,64h,0d2h,11h,8eh,39h,00h,0a0h,0c9h,69h,72h,3bh
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struc EFI_BLOCK_IO_PROTOCOL {
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.Revision int64
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.Media dptr
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.Reset dptr
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.ReadBlocks dptr
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.WriteBlocks dptr
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.FlushBlocks dptr
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}
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struct EFI_BLOCK_IO_PROTOCOL
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struc EFI_BLOCK_IO_MEDIA {
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.MediaId int32
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.RemovableMedia int8
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.MediaPresent int8
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.LogicalPartition int8
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.ReadOnly int8
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.WriteCaching int8
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.BlockSize int32
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.IoAlign int32
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.LastBlock int64
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}
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struct EFI_BLOCK_IO_MEDIA
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EFI_GRAPHICS_OUTPUT_PROTOCOL_UUID equ 0deh, 0a9h, 42h,90h,0dch,023h,38h,04ah,96h,0fbh,7ah,0deh,0d0h,80h,51h,6ah
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struc EFI_GRAPHICS_OUTPUT_PROTOCOL {
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.QueryMode dptr
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.SetMode dptr
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.Blt dptr
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.Mode dptr
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}
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struct EFI_GRAPHICS_OUTPUT_PROTOCOL
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struc EFI_GRAPHICS_OUTPUT_PROTOCOL_MODE {
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.MaxMode int32
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.CurrentMode int32
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.ModeInfo dptr
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.SizeOfModeInfo intn
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.FrameBufferBase dptr
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.FrameBufferSize intn
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}
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struct EFI_GRAPHICS_OUTPUT_PROTOCOL_MODE
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struc EFI_GRAPHICS_OUTPUT_MODE_INFORMATION {
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.Version int32
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.HorizontalResolution int32
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.VerticalResolution int32
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.PixelFormat int32
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.RedMask int32
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.GreenMask int32
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.BlueMask int32
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.Reserved int32
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.PixelsPerScanline int32
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}
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struct EFI_GRAPHICS_OUTPUT_MODE_INFORMATION
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;---macros to make life easier---
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;call it early, after entry point is the best
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macro InitializeLib
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{
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clc
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or rdx, rdx
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jz .badout
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cmp dword [rdx], 20494249h
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je @f
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.badout: xor rcx, rcx
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xor rdx, rdx
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stc
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@@: mov [efi_handler], rcx ; ImageHandle
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mov [efi_ptr], rdx ; pointer to SystemTable
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}
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;*********************************************************************
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;* Library functions *
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;*********************************************************************
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section '.data' data readable writeable
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efi_handler: dq 0
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efi_ptr: dq 0
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uefi_rsptmp: dq 0
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