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| author | Haoran Jiang <jianghaoran@kylinos.cn> | 2026-07-23 22:27:30 +0800 |
|---|---|---|
| committer | Huacai Chen <chenhuacai@loongson.cn> | 2026-07-23 22:27:30 +0800 |
| commit | 73555fdab5e1e4f24ca000c41a616b34edf4b55d (patch) | |
| tree | 676069e2a7b031b909d208cb8bd1557ceb9db86e /arch | |
| parent | 485ed44db5694d8d2e5027f63ad608e705286f30 (diff) | |
| download | linux-next-73555fdab5e1e4f24ca000c41a616b34edf4b55d.tar.gz linux-next-73555fdab5e1e4f24ca000c41a616b34edf4b55d.zip | |
LoongArch: Fix oops during single-step debugging
When entering KDB via a breakpoint and then performing single-step
debugging, an oops is triggered. Now during single-step debugging,
kdb_local() expects the reason to be KDB_REASON_SSTEP, but it is
actually KDB_REASON_OOPS. In kdb_stub(), when determining the reason,
the ex_vector for single-step should be 0, as already implemented on
other architectures such as arm64 and riscv.
Before the patch:
[112]kdb> ss
Entering kdb (current=0x900020009f520000, pid 10661) on
processor 112 Oops: (null)
due to oops @ 0x90000000005b57a4
Cc: stable@vger.kernel.org
Signed-off-by: Haoran Jiang <jianghaoran@kylinos.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/loongarch/kernel/kgdb.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/loongarch/kernel/kgdb.c b/arch/loongarch/kernel/kgdb.c index 17664a6043b1..e7b59f8a4b05 100644 --- a/arch/loongarch/kernel/kgdb.c +++ b/arch/loongarch/kernel/kgdb.c @@ -252,7 +252,8 @@ static int kgdb_loongarch_notify(struct notifier_block *self, unsigned long cmd, if (atomic_read(&kgdb_active) != -1) kgdb_nmicallback(smp_processor_id(), regs); - if (kgdb_handle_exception(args->trapnr, args->signr, cmd, regs)) + if (kgdb_handle_exception(regs->csr_era == stepped_address ? 0 : args->trapnr, + args->signr, cmd, regs)) return NOTIFY_DONE; if (atomic_read(&kgdb_setting_breakpoint)) |