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// SPDX-License-Identifier: GPL-2.0-only
/*
* Generic return hook for riscv.
*/
#include <linux/kprobes.h>
#include <linux/rethook.h>
#include "rethook.h"
/* This is called from arch_rethook_trampoline() */
unsigned long __used arch_rethook_trampoline_callback(struct pt_regs *regs)
{
return rethook_trampoline_handler(regs, regs->s0);
}
NOKPROBE_SYMBOL(arch_rethook_trampoline_callback);
void arch_rethook_prepare(struct rethook_node *rhn, struct pt_regs *regs, bool mcount)
{
rhn->ret_addr = regs->ra;
rhn->frame = regs->s0;
/* replace return addr with trampoline */
regs->ra = (unsigned long)arch_rethook_trampoline;
}
NOKPROBE_SYMBOL(arch_rethook_prepare);
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