Messages in this thread Patch in this message | | | From | Rongwei Wang <> | Subject | [PATCH 1/3] arm64:insn: Export symbols for MSR ARM driver | Date | Tue, 1 Dec 2020 01:48:31 +0800 |
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In order to use the MSR-ARM driver in module and built-in ways, we need export following symbols.
The MSR-ARM driver depends on function aarch64_insn_patch_text to modify the text at runtime, and function aarch64_insn_read to read one instruction in the specified address.
In addition, we need register_undef_hook and unregister_undef_hook to handle the low probability undefined exception which triggered only by MSR-ARM driver.
Signed-off-by: Rongwei Wang <rongwei.wang@linux.alibaba.com> --- arch/arm64/kernel/insn.c | 2 ++ arch/arm64/kernel/traps.c | 2 ++ 2 files changed, 4 insertions(+)
diff --git a/arch/arm64/kernel/insn.c b/arch/arm64/kernel/insn.c index 6c0de2f..67a1f78 100644 --- a/arch/arm64/kernel/insn.c +++ b/arch/arm64/kernel/insn.c @@ -135,6 +135,7 @@ int __kprobes aarch64_insn_read(void *addr, u32 *insnp) return ret; } +EXPORT_SYMBOL(aarch64_insn_read); static int __kprobes __aarch64_insn_write(void *addr, __le32 insn) { @@ -247,6 +248,7 @@ int __kprobes aarch64_insn_patch_text(void *addrs[], u32 insns[], int cnt) return stop_machine_cpuslocked(aarch64_insn_patch_text_cb, &patch, cpu_online_mask); } +EXPORT_SYMBOL(aarch64_insn_patch_text); static int __kprobes aarch64_get_imm_shift_mask(enum aarch64_insn_imm_type type, u32 *maskp, int *shiftp) diff --git a/arch/arm64/kernel/traps.c b/arch/arm64/kernel/traps.c index 8af4e0e..c76efa5 100644 --- a/arch/arm64/kernel/traps.c +++ b/arch/arm64/kernel/traps.c @@ -292,6 +292,7 @@ void register_undef_hook(struct undef_hook *hook) list_add(&hook->node, &undef_hook); raw_spin_unlock_irqrestore(&undef_lock, flags); } +EXPORT_SYMBOL(register_undef_hook); void unregister_undef_hook(struct undef_hook *hook) { @@ -301,6 +302,7 @@ void unregister_undef_hook(struct undef_hook *hook) list_del(&hook->node); raw_spin_unlock_irqrestore(&undef_lock, flags); } +EXPORT_SYMBOL(unregister_undef_hook); static int call_undef_hook(struct pt_regs *regs) { -- 1.8.3.1
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