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/****************************************************************************************/
/* */
/* File : f_status.asm /_________/ */
/* Author : Joe | */
/* Date : 04/2020 | */
/* Info : Gets batt status | */
/* / | */
/* \ / */
/* \_____/ */
/* */
/****************************************************************************************/
/***************/
/* 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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