66 lines
1.8 KiB
ArmAsm
66 lines
1.8 KiB
ArmAsm
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/* startup.S - bootstrap GRUB itself */
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/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2006 Free Software Foundation, Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <config.h>
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#include <grub/symbol.h>
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#include <grub/boot.h>
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.file "startup.S"
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.text
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.globl start, _start
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start:
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_start:
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jmp codestart
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/*
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* Compatibility version number
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*
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* These MUST be at byte offset 6 and 7 of the executable
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* DO NOT MOVE !!!
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*/
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. = EXT_C(start) + 0x6
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.byte GRUB_BOOT_VERSION_MAJOR, GRUB_BOOT_VERSION_MINOR
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/*
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* This is a special data area 8 bytes from the beginning.
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*/
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. = EXT_C(start) + 0x8
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VARIABLE(grub_prefix)
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.string "/boot/grub"
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/*
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* Leave some breathing room for the prefix.
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*/
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. = EXT_C(start) + 0x50
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codestart:
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/*
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* EFI_SYSTEM_TABLE * and EFI_HANDLE are passed on the stack.
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*/
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movl 4(%esp), %eax
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movl %eax, EXT_C(grub_efi_image_handle)
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movl 8(%esp), %eax
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movl %eax, EXT_C(grub_efi_system_table)
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call EXT_C(grub_main)
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ret
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