2013-12-06 14:20:46 -05:00
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# Declare constants for creating a multiboot header
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.set ALIGN, 1<<0
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.set MEMINFO, 1<<1
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.set FLAGS, ALIGN | MEMINFO
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.set MAGIC, 0x1BADB002
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.set CHECKSUM, -(MAGIC + FLAGS)
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# Declare multiboot header
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.section .multiboot
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.align 4
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.long MAGIC
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.long FLAGS
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.long CHECKSUM
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# Create a 16 KiB stack
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.section .bootstrap_stack
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stack_bottom:
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.skip 16384
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stack_top:
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# Kernel entry point
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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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# We are now in kernel mode!
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# Setup the stack
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movl $stack_top, %esp
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2014-01-31 16:12:04 -05:00
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# Push the multiboot information onto the stack
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push %ebx
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push %eax
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2013-12-06 14:20:46 -05:00
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# Call the main kernel function
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call brados_main
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# In case the function returns, enter an endless loop
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cli
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hlt
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.Lhang:
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jmp .Lhang
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# Set the size of the _start symbol for debugging
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.size _start, . - _start
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