函数名称未显示在gdb backtrace kgdb设置中

Question

我使用以下链接在两个VMWare虚拟机之间建立了KGDB的调试环境：

https://embeddedguruji.blogspot.com/2018/12/debugging-linux-kernel-using-kgdb-part-1.html

运行backtrace时，没有得到函数名称。我在这里想念什么？

 Program received signal SIGTRAP, Trace/breakpoint trap.
0xffffffff9f141990 in ?? ()
(gdb) bt
#0  0xffffffff9f141990 in ?? ()
#1  0xffffffff9f55d962 in ?? ()
#2  0x0000000000000002 in irq_stack_union ()
#3  0xffffba8801a87f10 in ?? ()
#4  0x00000000017c4408 in ?? ()
#5  0xffffba8801a87f10 in ?? ()
#6  0xffffffff9f55ddb4 in ?? ()
#7  0xffff949d8a62f740 in ?? ()
#8  0xffffffff9f2cf5cc in ?? ()
#9  0x0000000001917000 in ?? ()
#10 0xffff949daf914400 in ?? ()
#11 0xffffffff9f25a066 in ?? ()
#12 0xffff949db7109ea0 in ?? ()
#13 0xffff949daf914400 in ?? ()
#14 0x0000000000000002 in irq_stack_union ()
#15 0xffffba8801a87f10 in ?? ()
#16 0x0000000000000000 in ?? ()