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authorHelge Deller <deller@gmx.de>2018-08-05 00:03:29 +0200
committerHelge Deller <deller@gmx.de>2018-08-13 09:54:17 +0200
commitc8921d72e390cb6fca3fb2b0c2badfda851647eb (patch)
tree8c6aec1a9405da9caad70088a7dfd910b71b6675 /arch/parisc/kernel/traps.c
parentparisc: Remove unnecessary barriers from spinlock.h (diff)
downloadlinux-dev-c8921d72e390cb6fca3fb2b0c2badfda851647eb.tar.xz
linux-dev-c8921d72e390cb6fca3fb2b0c2badfda851647eb.zip
parisc: Fix and improve kernel stack unwinding
This patchset fixes and improves stack unwinding a lot: 1. Show backward stack traces with up to 30 callsites 2. Add callinfo to ENTRY_CFI() such that every assembler function will get an entry in the unwind table 3. Use constants instead of numbers in call_on_stack() 4. Do not depend on CONFIG_KALLSYMS to generate backtraces. 5. Speed up backtrace generation Make sure you have this patch to GNU as installed: https://sourceware.org/ml/binutils/2018-07/msg00474.html Without this patch, unwind info in the kernel is often wrong for various functions. Signed-off-by: Helge Deller <deller@gmx.de>
Diffstat (limited to '')
-rw-r--r--arch/parisc/kernel/traps.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/parisc/kernel/traps.c b/arch/parisc/kernel/traps.c
index 4309ad31a874..318815212518 100644
--- a/arch/parisc/kernel/traps.c
+++ b/arch/parisc/kernel/traps.c
@@ -172,7 +172,7 @@ static void do_show_stack(struct unwind_frame_info *info)
int i = 1;
printk(KERN_CRIT "Backtrace:\n");
- while (i <= 16) {
+ while (i <= MAX_UNWIND_ENTRIES) {
if (unwind_once(info) < 0 || info->ip == 0)
break;