riscv: kprobes: add test case for c.jal instruction simulation

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Add a test case validating that kprobes correctly simulates the
c.jal instruction on RV32.

The test uses two probe points: a forward c.jal and a backward
c.jal, and verifies that the containing function returns the
expected magic value KPROBE_TEST_MAGIC after kprobe interception.

Co-developed-by: Xiaofeng Yuan <xiaofengmian@163.com>
Signed-off-by: Nam Cao <namcao@linutronix.de>
Signed-off-by: Xiaofeng Yuan <xiaofengmian@163.com>
Reviewed-by: Charlie Jenkins <thecharlesjenkins@gmail.com>
Tested-by: Charlie Jenkins <thecharlesjenkins@gmail.com>
Link: https://patch.msgid.link/20260701081033.49871-3-xiaofengmian@163.com
Signed-off-by: Paul Walmsley <pjw@kernel.org>

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Nam Cao 2026-08-07 19:24:29 -06:00 • committed by Paul Walmsley

parent 540ad5ad05

commit 0d4a777c4c

1 changed files with 24 additions and 0 deletions

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arch/riscv/kernel/tests/kprobes/test-kprobes-asm.S

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