From 61598093bbdd283a7edc367d900f223070ead8d2 Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Fri, 10 May 2024 07:43:03 +0000
Subject: [PATCH] add ax88772C AX88772C_eeprom_tools
---
kernel/arch/arm64/include/asm/ftrace.h | 42 ++++++++++++++++++++++++++++++++++++++----
1 files changed, 38 insertions(+), 4 deletions(-)
diff --git a/kernel/arch/arm64/include/asm/ftrace.h b/kernel/arch/arm64/include/asm/ftrace.h
index fac54fb..91fa4ba 100644
--- a/kernel/arch/arm64/include/asm/ftrace.h
+++ b/kernel/arch/arm64/include/asm/ftrace.h
@@ -1,20 +1,42 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
/*
* arch/arm64/include/asm/ftrace.h
*
* Copyright (C) 2013 Linaro Limited
* Author: AKASHI Takahiro <takahiro.akashi@linaro.org>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
*/
#ifndef __ASM_FTRACE_H
#define __ASM_FTRACE_H
#include <asm/insn.h>
+#define HAVE_FUNCTION_GRAPH_FP_TEST
+
+#ifdef CONFIG_DYNAMIC_FTRACE_WITH_REGS
+#define ARCH_SUPPORTS_FTRACE_OPS 1
+#else
#define MCOUNT_ADDR ((unsigned long)_mcount)
+#endif
+
+/* The BL at the callsite's adjusted rec->ip */
#define MCOUNT_INSN_SIZE AARCH64_INSN_SIZE
+
+#define FTRACE_PLT_IDX 0
+#define FTRACE_REGS_PLT_IDX 1
+#define NR_FTRACE_PLTS 2
+
+/*
+ * Currently, gcc tends to save the link register after the local variables
+ * on the stack. This causes the max stack tracer to report the function
+ * frame sizes for the wrong functions. By defining
+ * ARCH_FTRACE_SHIFT_STACK_TRACER, it will tell the stack tracer to expect
+ * to find the return address on the stack after the local variables have
+ * been set up.
+ *
+ * Note, this may change in the future, and we will need to deal with that
+ * if it were to happen.
+ */
+#define ARCH_FTRACE_SHIFT_STACK_TRACER 1
#ifndef __ASSEMBLY__
#include <linux/compat.h>
@@ -33,12 +55,24 @@
static inline unsigned long ftrace_call_adjust(unsigned long addr)
{
/*
+ * Adjust addr to point at the BL in the callsite.
+ * See ftrace_init_nop() for the callsite sequence.
+ */
+ if (IS_ENABLED(CONFIG_DYNAMIC_FTRACE_WITH_REGS))
+ return addr + AARCH64_INSN_SIZE;
+ /*
* addr is the address of the mcount call instruction.
* recordmcount does the necessary offset calculation.
*/
return addr;
}
+#ifdef CONFIG_DYNAMIC_FTRACE_WITH_REGS
+struct dyn_ftrace;
+int ftrace_init_nop(struct module *mod, struct dyn_ftrace *rec);
+#define ftrace_init_nop ftrace_init_nop
+#endif
+
#define ftrace_return_address(n) return_address(n)
/*
--
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