functions about dump backtrace function names in mips arch

[loody]

 Dear all:
 If i remember correctly, when kernel panic there is a function I can
 use to dump all the names of backtrace functions.
 I have searched arch/mips/traps.c, but I only can see the dump
 functions of cpu registers,

 If my assumption is true, would anyone tell me what the name is or
 what Doc I can looking for?
 appreciate your help,
miloody