Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1choice
2 prompt "Choose kernel unwinder"
3 default UNWINDER_PROLOGUE if KALLSYMS
4 help
5 This determines which method will be used for unwinding kernel stack
6 traces for panics, oopses, bugs, warnings, perf, /proc/<pid>/stack,
7 lockdep, and more.
8
9config UNWINDER_GUESS
10 bool "Guess unwinder"
11 help
12 This option enables the "guess" unwinder for unwinding kernel stack
13 traces. It scans the stack and reports every kernel text address it
14 finds. Some of the addresses it reports may be incorrect.
15
16 While this option often produces false positives, it can still be
17 useful in many cases.
18
19config UNWINDER_PROLOGUE
20 bool "Prologue unwinder"
21 depends on KALLSYMS
22 help
23 This option enables the "prologue" unwinder for unwinding kernel stack
24 traces. It unwind the stack frame based on prologue code analyze. Symbol
25 information is needed, at least the address and length of each function.
26 Some of the addresses it reports may be incorrect (but better than the
27 Guess unwinder).
28
29config UNWINDER_ORC
30 bool "ORC unwinder"
31 depends on HAVE_OBJTOOL
32 select OBJTOOL
33 help
34 This option enables the ORC (Oops Rewind Capability) unwinder for
35 unwinding kernel stack traces. It uses a custom data format which is
36 a simplified version of the DWARF Call Frame Information standard.
37
38 Enabling this option will increase the kernel's runtime memory usage
39 by roughly 2-4MB, depending on your kernel config.
40
41endchoice