diff options
| author | Haoran Jiang <jianghaoran@kylinos.cn> | 2023-06-29 20:58:44 +0800 |
|---|---|---|
| committer | Huacai Chen <chenhuacai@loongson.cn> | 2023-06-29 20:58:44 +0800 |
| commit | 7b0a096436c2dac6de77d132e751a8a3328798d5 (patch) | |
| tree | 2cfddd47c9438bc1ba0241836a22033f4473b627 /arch/loongarch/kernel/kprobes.c | |
| parent | f02644e32c9e4bd1a9b286dc0b84f9cbe294f4e2 (diff) | |
LoongArch: Replace kretprobe with rethook
This is an adaptation of commit f3a112c0c40d ("x86,rethook,kprobes:
Replace kretprobe with rethook on x86") and commit b57c2f124098 ("riscv:
add riscv rethook implementation") to LoongArch. Mainly refer to commit
b57c2f124098 ("riscv: add riscv rethook implementation").
Replaces the kretprobe code with rethook on LoongArch. With this patch,
kretprobe on LoongArch uses the rethook instead of kretprobe specific
trampoline code.
Signed-off-by: Haoran Jiang <jianghaoran@kylinos.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
Diffstat (limited to 'arch/loongarch/kernel/kprobes.c')
| -rw-r--r-- | arch/loongarch/kernel/kprobes.c | 21 |
1 files changed, 0 insertions, 21 deletions
diff --git a/arch/loongarch/kernel/kprobes.c b/arch/loongarch/kernel/kprobes.c index 56c8c4b09a42..83467232ca3c 100644 --- a/arch/loongarch/kernel/kprobes.c +++ b/arch/loongarch/kernel/kprobes.c @@ -378,27 +378,6 @@ int __init arch_init_kprobes(void) return 0; } -/* ASM function that handles the kretprobes must not be probed */ -NOKPROBE_SYMBOL(__kretprobe_trampoline); - -/* Called from __kretprobe_trampoline */ -void __used *trampoline_probe_handler(struct pt_regs *regs) -{ - return (void *)kretprobe_trampoline_handler(regs, NULL); -} -NOKPROBE_SYMBOL(trampoline_probe_handler); - -void arch_prepare_kretprobe(struct kretprobe_instance *ri, - struct pt_regs *regs) -{ - ri->ret_addr = (kprobe_opcode_t *)regs->regs[1]; - ri->fp = NULL; - - /* Replace the return addr with trampoline addr */ - regs->regs[1] = (unsigned long)&__kretprobe_trampoline; -} -NOKPROBE_SYMBOL(arch_prepare_kretprobe); - int arch_trampoline_kprobe(struct kprobe *p) { return 0; |