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/*
* ========================
* ===== ===============
* ====== ================
* ====== ================
* ====== ==== ==== ==
* ====== === == = =
* ====== === = == =
* = === === = == ====
* = === === = == = =
* == ===== ==== ==
* ========================
*
* SPDX-License-Identifier: BSD-3-Clause
*
* Copyright (c) 2020-2021 Joe
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the organization nor the
* names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY JOE ''AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL JOE BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* lowbat: asm/f_status.S
* Wed Feb 10 18:23:30 CET 2021
* Joe
*/
/*
* apm status
* ----------
* 0: high
* 1: low
* 2: critical
* 3: charging
*/
.text
.extern system
.globl f_status
f_status:
movq $f_cmd, %rdi
callq system
movq $st_file, %rdi
xorq %rsi, %rsi
xorq %rax, %rax
movb $0x5, %al /* sys_open */
syscall
jc err
movq %rax, %rdi
movq $buff, %rsi
xorq %rdx, %rdx
xorq %rax, %rax
movb $0x1, %dl
movb $0x3, %al /* sys_read */
syscall
jc err
xorq %rax, %rax
movb $0x6, %al /* sys_close */
syscall
xorq %rax, %rax
movb (%rsi), %al
subb $0x30, %al
retq
err:
xorq %rax, %rax
movb $0xfe, %al
retq
.data
f_cmd: .asciz "apm -b >/tmp/lowbat.status"
st_file: .asciz "/tmp/lowbat.status"
buff: .byte 0x0, 0x0
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