add r8169 read mac form eeprom

hc

2024-02-19 1c055e55a242a33e574e48be530e06770a210dcd

 kernel/arch/arm64/include/asm/linkage.h
..
..
@@ -4,4 +4,60 @@
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 #define __ALIGN		.align 2
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 #define __ALIGN_STR	".align 2"
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+#if defined(CONFIG_ARM64_BTI_KERNEL) && defined(__aarch64__)
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+
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+/*
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+ * Since current versions of gas reject the BTI instruction unless we
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+ * set the architecture version to v8.5 we use the hint instruction
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+ * instead.
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+ */
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+#define BTI_C hint 34 ;
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+
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+/*
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+ * When using in-kernel BTI we need to ensure that PCS-conformant assembly
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+ * functions have suitable annotations.  Override SYM_FUNC_START to insert
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+ * a BTI landing pad at the start of everything.
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+ */
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+#define SYM_FUNC_START(name)				\
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+	SYM_START(name, SYM_L_GLOBAL, SYM_A_ALIGN)	\
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+	BTI_C
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+
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+#define SYM_FUNC_START_NOALIGN(name)			\
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+	SYM_START(name, SYM_L_GLOBAL, SYM_A_NONE)	\
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+	BTI_C
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+
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+#define SYM_FUNC_START_LOCAL(name)			\
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+	SYM_START(name, SYM_L_LOCAL, SYM_A_ALIGN)	\
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+	BTI_C
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+
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+#define SYM_FUNC_START_LOCAL_NOALIGN(name)		\
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+	SYM_START(name, SYM_L_LOCAL, SYM_A_NONE)	\
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+	BTI_C
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+
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+#define SYM_FUNC_START_WEAK(name)			\
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+	SYM_START(name, SYM_L_WEAK, SYM_A_ALIGN)	\
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+	BTI_C
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+
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+#define SYM_FUNC_START_WEAK_NOALIGN(name)		\
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+	SYM_START(name, SYM_L_WEAK, SYM_A_NONE)		\
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+	BTI_C
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+
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+#endif
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+
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+/*
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+ * Annotate a function as position independent, i.e., safe to be called before
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+ * the kernel virtual mapping is activated.
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+ */
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+#define SYM_FUNC_START_PI(x)			\
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+		SYM_FUNC_START_ALIAS(__pi_##x);	\
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+		SYM_FUNC_START(x)
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+
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+#define SYM_FUNC_START_WEAK_PI(x)		\
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+		SYM_FUNC_START_ALIAS(__pi_##x);	\
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+		SYM_FUNC_START_WEAK(x)
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+
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+#define SYM_FUNC_END_PI(x)			\
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+		SYM_FUNC_END(x);		\
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+		SYM_FUNC_END_ALIAS(__pi_##x)
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+
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 #endif