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| author | Qing Zhang <zhangqing@loongson.cn> | 2022-08-06 16:10:03 +0800 |
|---|---|---|
| committer | Huacai Chen <chenhuacai@loongson.cn> | 2022-08-12 13:10:11 +0800 |
| commit | 49aef111e2dae176a7708b532118f33f24289248 (patch) | |
| tree | 394ff32e5dba1e22ebac5015fe3164e7ed2e8a77 /arch/loongarch/Kconfig.debug | |
| parent | 49232773d8233ed70c4998851bc84e465fc1c788 (diff) | |
| download | linux-49aef111e2dae176a7708b532118f33f24289248.tar.gz linux-49aef111e2dae176a7708b532118f33f24289248.tar.bz2 linux-49aef111e2dae176a7708b532118f33f24289248.zip | |
LoongArch: Add prologue unwinder support
It unwind the stack frame based on prologue code analyze.
CONFIG_KALLSYMS is needed, at least the address and length
of each function.
Three stages when we do unwind,
1) unwind_start(), the prapare of unwinding, fill unwind_state.
2) unwind_done(), judge whether the unwind process is finished or not.
3) unwind_next_frame(), unwind the next frame.
Dividing unwinder helps to add new unwinders in the future, e.g.:
unwinder_frame, unwinder_orc, .etc.
Signed-off-by: Qing Zhang <zhangqing@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
Diffstat (limited to 'arch/loongarch/Kconfig.debug')
| -rw-r--r-- | arch/loongarch/Kconfig.debug | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/arch/loongarch/Kconfig.debug b/arch/loongarch/Kconfig.debug index 68634d4fa27b..8d36aab53008 100644 --- a/arch/loongarch/Kconfig.debug +++ b/arch/loongarch/Kconfig.debug @@ -1,3 +1,11 @@ +choice + prompt "Choose kernel unwinder" + default UNWINDER_PROLOGUE if KALLSYMS + help + This determines which method will be used for unwinding kernel stack + traces for panics, oopses, bugs, warnings, perf, /proc/<pid>/stack, + lockdep, and more. + config UNWINDER_GUESS bool "Guess unwinder" help @@ -7,3 +15,15 @@ config UNWINDER_GUESS While this option often produces false positives, it can still be useful in many cases. + +config UNWINDER_PROLOGUE + bool "Prologue unwinder" + depends on KALLSYMS + help + This option enables the "prologue" unwinder for unwinding kernel stack + traces. It unwind the stack frame based on prologue code analyze. Symbol + information is needed, at least the address and length of each function. + Some of the addresses it reports may be incorrect (but better than the + Guess unwinder). + +endchoice |