diff options
Diffstat (limited to 'asm/f_status.S')
| -rw-r--r-- | asm/f_status.S | 92 |
1 files changed, 92 insertions, 0 deletions
diff --git a/asm/f_status.S b/asm/f_status.S new file mode 100644 index 0000000..54f25a6 --- /dev/null +++ b/asm/f_status.S @@ -0,0 +1,92 @@ +/* + * ======================== + * ===== =============== + * ====== ================ + * ====== ================ + * ====== ==== ==== == + * ====== === == = = + * ====== === = == = + * = === === = == ==== + * = === === = == = = + * == ===== ==== == + * ======================== + * + * 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 |