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.set MAGIC, 0x1BADB002
.set FLAG_ALIGN, 1<<0 /* align modules on page boundaries */
.set FLAG_MEMINFO, 1<<1 /* memory map */
.set FLAGS, FLAG_ALIGN | FLAG_MEMINFO
.set CHECKSUM, -(MAGIC + FLAGS)
.section .multiboot
.align 4
.long MAGIC
.long FLAGS
.long CHECKSUM
/* a lil stack */
.section .bss
.global stack_top
.type stack_top, @object
.align 16
stack_bottom:
.skip 16384
stack_top:
.section .text
.global _start
.type _start, @function
_start:
mov $stack_top, %esp
call kmain
.global halt_cpu
.type halt_cpu, @function
halt_cpu:
cli
1: hlt
jmp 1b
// temporary, will be moved to another file soon
.global change_cs
.type change_cs, @function
change_cs:
/* retf pops off the return address and code segment off the stack.
* it turns out that in the i386 cdecl calling convention they're in
* the correct place already.
*/
retf
.size _start, . - _start
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