cosmopolitan/libc/stubs/triplf.S

43 lines
2.3 KiB
ArmAsm

/*-*- mode:unix-assembly; indent-tabs-mode:t; tab-width:8; coding:utf-8 -*-│
vi: set et ft=asm ts=8 tw=8 fenc=utf-8 :vi
Copyright 2020 Justine Alexandra Roberts Tunney
This program is free software; you can redistribute it and/or modify │
it under the terms of the GNU General Public License as published by
the Free Software Foundation; version 2 of the License. │
This program is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of │
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software │
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301 USA
*/
#include "ape/macros.h"
#include "ape/config.h"
.real
.source __FILE__
.code16 # .code32 .code64
/ Hoses interrupt descriptor table and triple-faults the system.
/
/ @see youtu.be/GIKfEAF2Yhw?t=67
/ @mode long,legacy,real
triplf: push %bp
mov %sp,%bp
sub $8,%sp
movpp %bp,%si
lea -8(%bp),%di
pushpop 8,%cx
xor %ax,%ax
rep stosb
0: cli
lidt -8(%bp)
ud2
jmp 0b
.endfn triplf,globl,protected