My personal OS project
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798 B

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