mirror of
https://git.savannah.gnu.org/git/grub.git
synced 2026-10-20 22:48:22 +00:00
Javier Martinez Canillas
b87781feaf
Nothing defined in the header file is used in the assembly code but it may lead to build errors if some headers are included through this and contains definitions that are not recognized by the assembler, e.g.: ../include/grub/types.h: Assembler messages: ../include/grub/types.h:76: Error: no such instruction: `typedef signed char grub_int8_t' ../include/grub/types.h:77: Error: no such instruction: `typedef short grub_int16_t' ../include/grub/types.h:78: Error: no such instruction: `typedef int grub_int32_t' Signed-off-by: Javier Martinez Canillas <javierm@redhat.com> Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
63 lines
1.8 KiB
ArmAsm
63 lines
1.8 KiB
ArmAsm
/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 1999,2000,2001,2002,2003,2005,2006,2007,2008 Free Software Foundation, Inc.
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*
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* GRUB 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 3 of the License, or
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* (at your option) any later version.
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*
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* GRUB 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 GRUB. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <grub/symbol.h>
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#include <grub/machine/memory.h>
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#include <grub/offsets.h>
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#include <multiboot.h>
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#include <multiboot2.h>
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/*
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* Note: GRUB is compiled with the options -mrtd and -mregparm=3.
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* So the first three arguments are passed in %eax, %edx, and %ecx,
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* respectively, and if a function has a fixed number of arguments
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* and the number if greater than three, the function must return
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* with "ret $N" where N is ((the number of arguments) - 3) * 4.
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*/
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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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#ifdef GRUB_MACHINE_MULTIBOOT
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cmpl $MULTIBOOT_BOOTLOADER_MAGIC, %eax
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jne 0f
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movl %ebx, EXT_C(startup_multiboot_info)
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0:
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#endif
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/* initialize the stack */
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movl $GRUB_MEMORY_MACHINE_PROT_STACK, %esp
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/* jump to the main body of C code */
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jmp EXT_C(grub_main)
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/*
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* Support for booting GRUB from a Multiboot boot loader (e.g. GRUB itself).
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*/
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.p2align 2 /* force 4-byte alignment */
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multiboot_header:
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/* magic */
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.long 0x1BADB002
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/* flags */
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.long MULTIBOOT_MEMORY_INFO
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/* checksum */
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.long -0x1BADB002 - MULTIBOOT_MEMORY_INFO
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