ARM汇编返回指令

[  588.756226] task: ffff000008a22f80 task.stack: ffff000008a10000
[  588.762153] PC is at vb2_buffer_done+0x1c0/0x1f8
[  588.766778] LR is at rvin_irq+0x124/0x2b8
[  588.770790] pc : [<ffff0000085356e0>] lr : [<ffff00000854bb94>] pstate: 800001c5
PC：有预取指令，应该是当前执行的指令加8或其它
LR：返回地址
SP：堆栈指针

参考：https://blog.csdn.net/lee244868149/article/details/49488575