0
在下面的呼叫跟踪,我们看到函数调用ret_from_syscall。 这是哪个功能? 在系统调用期间何时会调用? 这是相应的代码在哪里?ret_from_syscall源代码,当它被称为
May 7 16:40:34.322086 warn TCU-0 kernel: [cf83ddc0] [00009751] 0x9751 (unreliable)
May 7 16:40:34.322086 warn TCU-0 kernel: [cf83ddd0] [c00469ac] do_syslog+0x198/0x424
May 7 16:40:34.322086 warn TCU-0 kernel: [cf83de30] [c0149574] kmsg_read+0x58/0x68
May 7 16:40:34.322086 warn TCU-0 kernel: [cf83de40] [c013f4c8] proc_reg_read+0x90/0xa8
May 7 16:40:34.322086 warn TCU-0 kernel: [cf83de70] [c00f4cb0] do_loop_readv_writev+0x48/0x84
May 7 16:40:34.322086 warn TCU-0 kernel: [cf83dea0] [c00f5870] do_readv_writev+0xcc/0x19c
May 7 16:40:34.322086 warn TCU-0 kernel: [cf83df10] [c00f5c54] sys_readv+0x50/0xfc
May 7 16:40:34.322086 warn TCU-0 kernel: [cf83df40] [c00100d8] ret_from_syscall+0x0/0x4
May 7 16:40:34.322086 warn TCU-0 kernel: --- Exception: c01 at 0xfcad5a8