arch/riscv/kernel/probes/rethook.c

Source file repositories/reference/linux-study-clean/arch/riscv/kernel/probes/rethook.c

File Facts

System
Linux kernel
Corpus path
arch/riscv/kernel/probes/rethook.c
Extension
.c
Size
674 bytes
Lines
28
Domain
Architecture Layer
Bucket
arch/riscv
Inferred role
Architecture Layer: implementation source
Status
source implementation candidate

Why This File Exists

CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.

Dependency Surface

Detected Declarations

Annotated Snippet

// 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);

Annotation

Implementation Notes