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45 lines
920 B
ArmAsm
45 lines
920 B
ArmAsm
.set MULTIBOOT_1_MAGIC, 0x1BADB002
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.set MULTIBOOT_1_FLAGS, (1 << 0) | (1 << 1) // Align, meminfo
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.set MULTIBOOT_1_CHECKSUM, -(MULTIBOOT_1_MAGIC + MULTIBOOT_1_FLAGS)
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.set MULTIBOOT_2_MAGIC, 0xE85250D6
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.set MULTIBOOT_2_ARCH, 0
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.set MULTIBOOT_2_LENGTH, 16 + 8
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.set MULTIBOOT_2_CHECKSUM, -(MULTIBOOT_2_MAGIC + MULTIBOOT_2_ARCH + MULTIBOOT_2_LENGTH)
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.section .multiboot2
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.align 4
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.long MULTIBOOT_2_MAGIC
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.long MULTIBOOT_2_ARCH
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.long MULTIBOOT_2_LENGTH
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.long MULTIBOOT_2_CHECKSUM
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.long 0
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.long 8
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.section .multiboot1
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.align 4
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.long MULTIBOOT_1_MAGIC
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.long MULTIBOOT_1_FLAGS
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.long MULTIBOOT_1_CHECKSUM
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.section .bss
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.align 16
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stack_bottom:
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.skip 16384 # 16 KiB
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stack_top:
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.section .text
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.global _start
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.type _start, @function
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_start:
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mov $stack_top, %esp
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push %ebx // unsigned long multiboot_info
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push %eax // unsigned int multiboot_magic
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call main
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cli
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1:
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hlt
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jmp 1b
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.size _start, . - _start
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