58 lines
1.1 KiB
ArmAsm
58 lines
1.1 KiB
ArmAsm
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/* mboot.S
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* legacybios assembler bootstrap for multiboot
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*
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* Copyright (C) 2003 Stefan Reinauer
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*
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* See the file "COPYING" for further information about
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* the copyright and warranty status of this work.
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*/
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#define ASM 1
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#include <multiboot.h>
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.text
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.code32
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.globl start, _start
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/* unused */
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start:
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_start:
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jmp multiboot_entry
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/* Align 32 bits boundary. */
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.align 4
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/* Multiboot header. */
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multiboot_header:
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.long MULTIBOOT_HEADER_MAGIC /* magic */
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.long MULTIBOOT_HEADER_FLAGS /* flags */
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.long -(MULTIBOOT_HEADER_MAGIC + MULTIBOOT_HEADER_FLAGS)
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/* checksum */
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.long multiboot_header /* header_addr */
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.long _start /* load_addr */
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.long _edata /* load_end_addr */
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.long _end /* bss_end_addr */
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.long multiboot_entry /* entry_addr */
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multiboot_entry:
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/* Initialize stack pointer. */
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movl $(stack + STACK_SIZE), %esp
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/* Reset EFLAGS. */
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pushl $0
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popf
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/* pointer to multiboot information structure. */
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pushl %ebx
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/* magic value. */
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pushl %eax
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/* jump to C main function... */
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call EXT_C(cmain)
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loop: hlt
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jmp loop
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.comm stack, STACK_SIZE /* stack area. */
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