From 9d77db3c730780c8ef5ccd4b66403ff5675cfe4e Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Mon, 13 May 2024 10:30:14 +0000
Subject: [PATCH] modify sin led gpio
---
kernel/arch/sh/kernel/kprobes.c | 66 +++------------------------------
1 files changed, 6 insertions(+), 60 deletions(-)
diff --git a/kernel/arch/sh/kernel/kprobes.c b/kernel/arch/sh/kernel/kprobes.c
index 241e903..756100b 100644
--- a/kernel/arch/sh/kernel/kprobes.c
+++ b/kernel/arch/sh/kernel/kprobes.c
@@ -1,12 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0
/*
* Kernel probes (kprobes) for SuperH
*
* Copyright (C) 2007 Chris Smith <chris.smith@st.com>
* Copyright (C) 2006 Lineo Solutions, Inc.
- *
- * This file is subject to the terms and conditions of the GNU General Public
- * License. See the file "COPYING" in the main directory of this archive
- * for more details.
*/
#include <linux/kprobes.h>
#include <linux/extable.h>
@@ -207,6 +204,7 @@
struct pt_regs *regs)
{
ri->ret_addr = (kprobe_opcode_t *) regs->pr;
+ ri->fp = NULL;
/* Replace the return addr with trampoline addr */
regs->pr = (unsigned long)kretprobe_trampoline;
@@ -305,62 +303,9 @@
*/
int __kprobes trampoline_probe_handler(struct kprobe *p, struct pt_regs *regs)
{
- struct kretprobe_instance *ri = NULL;
- struct hlist_head *head, empty_rp;
- struct hlist_node *tmp;
- unsigned long flags, orig_ret_address = 0;
- unsigned long trampoline_address = (unsigned long)&kretprobe_trampoline;
+ regs->pc = __kretprobe_trampoline_handler(regs, &kretprobe_trampoline, NULL);
- INIT_HLIST_HEAD(&empty_rp);
- kretprobe_hash_lock(current, &head, &flags);
-
- /*
- * It is possible to have multiple instances associated with a given
- * task either because an multiple functions in the call path
- * have a return probe installed on them, and/or more then one return
- * return probe was registered for a target function.
- *
- * We can handle this because:
- * - instances are always inserted at the head of the list
- * - when multiple return probes are registered for the same
- * function, the first instance's ret_addr will point to the
- * real return address, and all the rest will point to
- * kretprobe_trampoline
- */
- hlist_for_each_entry_safe(ri, tmp, head, hlist) {
- if (ri->task != current)
- /* another task is sharing our hash bucket */
- continue;
-
- if (ri->rp && ri->rp->handler) {
- __this_cpu_write(current_kprobe, &ri->rp->kp);
- ri->rp->handler(ri, regs);
- __this_cpu_write(current_kprobe, NULL);
- }
-
- orig_ret_address = (unsigned long)ri->ret_addr;
- recycle_rp_inst(ri, &empty_rp);
-
- if (orig_ret_address != trampoline_address)
- /*
- * This is the real return address. Any other
- * instances associated with this task are for
- * other calls deeper on the call stack
- */
- break;
- }
-
- kretprobe_assert(ri, orig_ret_address, trampoline_address);
-
- regs->pc = orig_ret_address;
- kretprobe_hash_unlock(current, &flags);
-
- hlist_for_each_entry_safe(ri, tmp, &empty_rp, hlist) {
- hlist_del(&ri->hlist);
- kfree(ri);
- }
-
- return orig_ret_address;
+ return 1;
}
static int __kprobes post_kprobe_handler(struct pt_regs *regs)
@@ -488,7 +433,8 @@
struct kprobe_ctlblk *kcb = get_kprobe_ctlblk();
addr = (kprobe_opcode_t *) (args->regs->pc);
- if (val == DIE_TRAP) {
+ if (val == DIE_TRAP &&
+ args->trapnr == (BREAKPOINT_INSTRUCTION & 0xff)) {
if (!kprobe_running()) {
if (kprobe_handler(args->regs)) {
ret = NOTIFY_STOP;
--
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