x86/idtentry: Provide IDTENTRY_ERRORCODE (aabfe538) · Commits · 戴 / test

arch/x86/include/asm/idtentry.h

+46 −0

Original line number	Diff line number	Diff line
		@@ -57,6 +57,49 @@ __visible noinstr void func(struct pt_regs *regs) \
		\
		static __always_inline void __##func(struct pt_regs *regs)

		/**
		* DECLARE_IDTENTRY_ERRORCODE - Declare functions for simple IDT entry points
		* Error code pushed by hardware
		* @vector: Vector number (ignored for C)
		* @func: Function name of the entry point
		*
		* Declares three functions:
		* - The ASM entry point: asm_##func
		* - The XEN PV trap entry point: xen_##func (maybe unused)
		* - The C handler called from the ASM entry point
		*
		* Same as DECLARE_IDTENTRY, but has an extra error_code argument for the
		* C-handler.
		*/
		#define DECLARE_IDTENTRY_ERRORCODE(vector, func) \
		asmlinkage void asm_##func(void); \
		asmlinkage void xen_asm_##func(void); \
		__visible void func(struct pt_regs *regs, unsigned long error_code)

		/**
		* DEFINE_IDTENTRY_ERRORCODE - Emit code for simple IDT entry points
		* Error code pushed by hardware
		* @func: Function name of the entry point
		*
		* Same as DEFINE_IDTENTRY, but has an extra error_code argument
		*/
		#define DEFINE_IDTENTRY_ERRORCODE(func) \
		static __always_inline void __##func(struct pt_regs *regs, \
		unsigned long error_code); \
		\
		__visible noinstr void func(struct pt_regs *regs, \
		unsigned long error_code) \
		{ \
		idtentry_enter(regs); \
		instrumentation_begin(); \
		__##func (regs, error_code); \
		instrumentation_end(); \
		idtentry_exit(regs); \
		} \
		\
		static __always_inline void __##func(struct pt_regs *regs, \
		unsigned long error_code)

		#else /* !__ASSEMBLY__ */

		/*
		@@ -65,6 +108,9 @@ static __always_inline void __##func(struct pt_regs *regs)
		#define DECLARE_IDTENTRY(vector, func) \
		idtentry vector asm_##func func has_error_code=0 sane=1

		#define DECLARE_IDTENTRY_ERRORCODE(vector, func) \
		idtentry vector asm_##func func has_error_code=1 sane=1

		#endif /* __ASSEMBLY__ */

		/*

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