1 // SPDX-License-Identifier: GPL-2.0 1
2 /*
3 * Generic return hook for LoongArch.
4 */
5
6 #include <linux/kprobes.h>
7 #include <linux/rethook.h>
8 #include "rethook.h"
9
10 /* This is called from arch_rethook_trampoline
11 unsigned long __used arch_rethook_trampoline_c
12 {
13 return rethook_trampoline_handler(regs
14 }
15 NOKPROBE_SYMBOL(arch_rethook_trampoline_callba
16
17 void arch_rethook_prepare(struct rethook_node
18 {
19 rhn->frame = 0;
20 rhn->ret_addr = regs->regs[1];
21
22 /* replace return addr with trampoline
23 regs->regs[1] = (unsigned long)arch_re
24 }
25 NOKPROBE_SYMBOL(arch_rethook_prepare);
26
27 /* ASM function that handles the rethook must
28 NOKPROBE_SYMBOL(arch_rethook_trampoline);
29
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