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| author | Tiezhu Yang <yangtiezhu@loongson.cn> | 2023-04-23 09:42:26 +0800 |
|---|---|---|
| committer | Palmer Dabbelt <palmer@rivosinc.com> | 2023-06-20 08:20:23 -0700 |
| commit | 58b1294dd1d65bb62f08dddbf418f954210c2057 (patch) | |
| tree | 7bf109c44c78c691937b90fde24143039b3ab2b2 /arch/riscv | |
| parent | 648321fa0d970c04b4327ac1a053abf43d285931 (diff) | |
| download | linux-stable-58b1294dd1d65bb62f08dddbf418f954210c2057.tar.gz linux-stable-58b1294dd1d65bb62f08dddbf418f954210c2057.tar.bz2 linux-stable-58b1294dd1d65bb62f08dddbf418f954210c2057.zip | |
riscv: uprobes: Restore thread.bad_cause
thread.bad_cause is saved in arch_uprobe_pre_xol(), it should be restored
in arch_uprobe_{post,abort}_xol() accordingly, otherwise the save operation
is meaningless, this change is similar with x86 and powerpc.
Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>
Acked-by: Oleg Nesterov <oleg@redhat.com>
Reviewed-by: Guo Ren <guoren@kernel.org>
Fixes: 74784081aac8 ("riscv: Add uprobes supported")
Link: https://lore.kernel.org/r/1682214146-3756-1-git-send-email-yangtiezhu@loongson.cn
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
Diffstat (limited to 'arch/riscv')
| -rw-r--r-- | arch/riscv/kernel/probes/uprobes.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/riscv/kernel/probes/uprobes.c b/arch/riscv/kernel/probes/uprobes.c index c976a21cd4bd..194f166b2cc4 100644 --- a/arch/riscv/kernel/probes/uprobes.c +++ b/arch/riscv/kernel/probes/uprobes.c @@ -67,6 +67,7 @@ int arch_uprobe_post_xol(struct arch_uprobe *auprobe, struct pt_regs *regs) struct uprobe_task *utask = current->utask; WARN_ON_ONCE(current->thread.bad_cause != UPROBE_TRAP_NR); + current->thread.bad_cause = utask->autask.saved_cause; instruction_pointer_set(regs, utask->vaddr + auprobe->insn_size); @@ -102,6 +103,7 @@ void arch_uprobe_abort_xol(struct arch_uprobe *auprobe, struct pt_regs *regs) { struct uprobe_task *utask = current->utask; + current->thread.bad_cause = utask->autask.saved_cause; /* * Task has received a fatal signal, so reset back to probbed * address. |