linux-kernel - [PATCH] MIPS: uprobes: Restore thread.trap

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Message-Id: <1682213883-3654-1-git-send-email-yangtiezhu@loongson.cn>
Date:   Sun, 23 Apr 2023 09:38:03 +0800
From:   Tiezhu Yang <yangtiezhu@...ngson.cn>
To:     Thomas Bogendoerfer <tsbogend@...ha.franken.de>
Cc:     linux-mips@...r.kernel.org, linux-kernel@...r.kernel.org,
        loongson-kernel@...ts.loongnix.cn
Subject: [PATCH] MIPS: uprobes: Restore thread.trap_nr

thread.trap_nr is saved in arch_uprobe_pre_xol(), it should be restored
in arch_uprobe_{post,abort}_xol() accordingly, actually it was only done
in the post function, just do it in the abort function too, this change
is similar with x86 and powerpc.

Signed-off-by: Tiezhu Yang <yangtiezhu@...ngson.cn>
---
 arch/mips/kernel/uprobes.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/mips/kernel/uprobes.c b/arch/mips/kernel/uprobes.c
index 6b630ed..401b148 100644
--- a/arch/mips/kernel/uprobes.c
+++ b/arch/mips/kernel/uprobes.c
@@ -191,6 +191,7 @@ void arch_uprobe_abort_xol(struct arch_uprobe *aup,
 {
 	struct uprobe_task *utask = current->utask;
 
+	current->thread.trap_nr = utask->autask.saved_trap_nr;
 	instruction_pointer_set(regs, utask->vaddr);
 }
 
-- 
2.1.0