diff options
| author | Nam Cao <namcao@linutronix.de> | 2026-08-07 19:24:29 -0600 |
|---|---|---|
| committer | Paul Walmsley <pjw@kernel.org> | 2026-08-07 19:24:29 -0600 |
| commit | 0d4a777c4cdaf6d55aa337a3c9fb825fd03fd371 (patch) | |
| tree | d2b80bb7f7d1003f75dd634d53178b45669a23af | |
| parent | 540ad5ad05a5945575b154caedfcdc08ed75b810 (diff) | |
riscv: kprobes: add test case for c.jal instruction simulation
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>
| -rw-r--r-- | arch/riscv/kernel/tests/kprobes/test-kprobes-asm.S | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/arch/riscv/kernel/tests/kprobes/test-kprobes-asm.S b/arch/riscv/kernel/tests/kprobes/test-kprobes-asm.S index f16deee9e091..15e50934bbd7 100644 --- a/arch/riscv/kernel/tests/kprobes/test-kprobes-asm.S +++ b/arch/riscv/kernel/tests/kprobes/test-kprobes-asm.S @@ -179,6 +179,23 @@ test_kprobes_c_bnez_addr3: ret SYM_FUNC_END(test_kprobes_c_bnez) +#ifdef CONFIG_32BIT +SYM_FUNC_START(test_kprobes_c_jal) + li a0, 0 + mv a1, ra +test_kprobes_c_jal_addr1: + c.jal 2f + ret +1: li a0, KPROBE_TEST_MAGIC_UPPER + ret +test_kprobes_c_jal_addr2: +2: c.jal 1b + li a2, KPROBE_TEST_MAGIC_LOWER + add a0, a0, a2 + jr a1 +SYM_FUNC_END(test_kprobes_c_jal) +#endif + #endif /* CONFIG_RISCV_ISA_C */ .section .rodata @@ -209,6 +226,10 @@ SYM_DATA_START(test_kprobes_addresses) RISCV_PTR test_kprobes_c_bnez_addr1 RISCV_PTR test_kprobes_c_bnez_addr2 RISCV_PTR test_kprobes_c_bnez_addr3 +#ifdef CONFIG_32BIT + RISCV_PTR test_kprobes_c_jal_addr1 + RISCV_PTR test_kprobes_c_jal_addr2 +#endif #endif /* CONFIG_RISCV_ISA_C */ RISCV_PTR 0 SYM_DATA_END(test_kprobes_addresses) @@ -226,6 +247,9 @@ SYM_DATA_START(test_kprobes_functions) RISCV_PTR test_kprobes_c_jalr RISCV_PTR test_kprobes_c_beqz RISCV_PTR test_kprobes_c_bnez +#ifdef CONFIG_32BIT + RISCV_PTR test_kprobes_c_jal +#endif #endif /* CONFIG_RISCV_ISA_C */ RISCV_PTR 0 SYM_DATA_END(test_kprobes_functions) |