xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

parisc: Fix and improve kernel stack unwinding

Browse Source 
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>
This commit is contained in:
Helge Deller
2018-08-05 00:03:29 +02:00
parent 3b885ac1dc
commit c8921d72e3
10 changed files with 88 additions and 232 deletions
Download Patch File Download Diff File Expand all files Collapse all files

6
arch/parisc/kernel/real2.S
View File

@@ -35,12 +35,6 @@ real32_stack:
real64_stack:
.block 8192
#ifdef CONFIG_64BIT
# define REG_SZ 8
#else
# define REG_SZ 4
#endif
#define N_SAVED_REGS 9
save_cr_space: