diff options
| author | Sumit Garg <[email protected]> | 2021-02-25 17:22:38 -0800 |
|---|---|---|
| committer | Linus Torvalds <[email protected]> | 2021-02-26 09:41:05 -0800 |
| commit | d54ce6158e354f5358a547b96299ecd7f3725393 (patch) | |
| tree | 77d4079c8206959088b80d57688fd0c4c64bfa96 /kernel/debug | |
| parent | db7fbf492d94a0b59d8f85b3184231662586dea9 (diff) | |
kgdb: fix to kill breakpoints on initmem after boot
Currently breakpoints in kernel .init.text section are not handled
correctly while allowing to remove them even after corresponding pages
have been freed.
Fix it via killing .init.text section breakpoints just prior to initmem
pages being freed.
Doug: "HW breakpoints aren't handled by this patch but it's probably
not such a big deal".
Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Sumit Garg <[email protected]>
Suggested-by: Doug Anderson <[email protected]>
Acked-by: Doug Anderson <[email protected]>
Acked-by: Daniel Thompson <[email protected]>
Tested-by: Daniel Thompson <[email protected]>
Cc: Masami Hiramatsu <[email protected]>
Cc: Steven Rostedt (VMware) <[email protected]>
Cc: Jason Wessel <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
Diffstat (limited to 'kernel/debug')
| -rw-r--r-- | kernel/debug/debug_core.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/kernel/debug/debug_core.c b/kernel/debug/debug_core.c index b636d517c02c..4708aec492df 100644 --- a/kernel/debug/debug_core.c +++ b/kernel/debug/debug_core.c @@ -455,6 +455,17 @@ setundefined: return 0; } +void kgdb_free_init_mem(void) +{ + int i; + + /* Clear init memory breakpoints. */ + for (i = 0; i < KGDB_MAX_BREAKPOINTS; i++) { + if (init_section_contains((void *)kgdb_break[i].bpt_addr, 0)) + kgdb_break[i].state = BP_UNDEFINED; + } +} + #ifdef CONFIG_KGDB_KDB void kdb_dump_stack_on_cpu(int cpu) { |