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.section .text
.global _start
.type _start, @function
_start:
mov $_bss_end, %esp // the stack is at the top of bss
call sysenter_setup
push %ebx // address of the Multiboot struct
call kmain_early
.global cpu_shutdown
.type cpu_shutdown, @function
cpu_shutdown:
/* This quits QEMU. While I couldn't find this officially documented anywhere,
* it is used by QEMU in tests/tcg/i386/system/boot.S (as of commit 40d6ee), so
* I assume that this is safe-ish to use */
mov $0x604, %edx
mov $0x2000, %eax
outw %ax, %dx
.global halt_cpu
.type halt_cpu, @function
halt_cpu:
cli
1: hlt
jmp 1b
.global cpu_pause
.type cpu_pause, @function
cpu_pause:
sti
hlt
cli
ret
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