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csky: Add uprobes support

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This patch adds support for uprobes on csky architecture.

Just like kprobe, it support single-step and simulate instructions.

Signed-off-by: Guo Ren <guoren@linux.alibaba.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Steven Rostedt (VMware) <rostedt@goodmis.org>
This commit is contained in:
Guo Ren
2020-04-02 19:52:27 +08:00
parent 33e53ae1ce
commit 8f6bb793b2
8 changed files with 201 additions and 1 deletions
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arch/csky/kernel/entry.S
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@@ -221,7 +221,7 @@ ret_from_exception:
andn r9, r10
ldw r12, (r9, TINFO_FLAGS)
andi r12, (_TIF_SIGPENDING | _TIF_NOTIFY_RESUME | _TIF_NEED_RESCHED)
andi r12, (_TIF_SIGPENDING | _TIF_NOTIFY_RESUME | _TIF_NEED_RESCHED | _TIF_UPROBE)
cmpnei r12, 0
bt exit_work
1: