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信号发送处理流程： https://www.cnblogs.com/sunsky303/p/10838610.html 阅读全文
posted @ 2021-10-20 17:03
aspirs
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sdcardfs sdcardfs_read() call flow [ 70.421020] CPU: 0 PID: 4007 Comm: Binder:2841_2 Tainted: P O 4.19.116+ #21 [ 70.429301] Hardware name: xxx (DT) [ 阅读全文
posted @ 2021-10-19 17:02
aspirs
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ARM registers arm register alias 4.19\arch\arm64\kernel\Asm-offsets.c DEFINE(S_X0, offsetof(struct pt_regs, regs[0])); DEFINE(S_X1, offsetof(struct pt 阅读全文
posted @ 2021-10-18 15:26
aspirs
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PowerManagerService.WakeLocks wake lock acquire call stack Line 5713: 09-19 09:06:40.206 3291 3291 E power : in acquire_wake_lock: is pmswakelocks. Li 阅读全文
posted @ 2021-10-14 18:06
aspirs
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cpp test program #include <iostream> using namespace std; int main() { const char* id = "PowerManagerService.WakeLocks"; std::string pmswakelocks = "P 阅读全文
posted @ 2021-10-14 17:13
aspirs
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apm-emulation driver framework 在suspend_prepare()里会call error = __pm_notifier_call_chain(PM_SUSPEND_PREPARE, -1, &nr_calls); 因为apm-emulation有注册关于此的cal 阅读全文
posted @ 2021-10-14 12:31
aspirs
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android STR suspend/resume framework console:/sys/power # cat wake_lock PowerManager.SuspendLockout PowerManagerService.Display console:/sys/power # c 阅读全文
posted @ 2021-10-14 11:39
aspirs
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c lang misc 补码 正数的补码就是其本身 负数的补码就是在其原码的基础上，符号位不变，取反后加一。 补码存在的意义就是为了统一计算机加减 比如（7）+（-7）=0 7 -> 0000 0111（7的补码） -7 -> 1111 1001（-7的补码） 所以相加为1 0000 0000（超出 阅读全文
posted @ 2021-10-08 16:52
aspirs
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9.1.3.3 Relocations Relocations for ‘MOVZ’ and ‘MOVK’ instructions can be generated by prefixing the label with ‘#:abs_g2:’ etc. For example to load t 阅读全文
posted @ 2021-10-04 22:03
aspirs
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print address/symbol(%p*) in kernel /* * Show a '%p' thing. A kernel extension is that the '%p' is followed * by an extra set of alphanumeric characte 阅读全文
posted @ 2021-10-03 10:35
aspirs
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