text: /* SPDX-License-Identifier: GPL-2.0 */
  #ifndef _ASM_X86_ASM_H
  #define _ASM_X86_ASM_H
  
  #ifdef __ASSEMBLY__
  # define __ASM_FORM(x)	x
  # define __ASM_FORM_RAW(x)     x
  # define __ASM_FORM_COMMA(x) x,
  #else
  #include <linux/stringify.h>
  
  # define __ASM_FORM(x)	" " __stringify(x) " "
  # define __ASM_FORM_RAW(x)     __stringify(x)
  # define __ASM_FORM_COMMA(x) " " __stringify(x) ","
  #endif
  
  #ifndef __x86_64__
  /* 32 bit */
  # define __ASM_SEL(a,b) __ASM_FORM(a)
  # define __ASM_SEL_RAW(a,b) __ASM_FORM_RAW(a)
  #else
  /* 64 bit */
  # define __ASM_SEL(a,b) __ASM_FORM(b)
  # define __ASM_SEL_RAW(a,b) __ASM_FORM_RAW(b)
  #endif
  
  #define __ASM_SIZE(inst, ...)	__ASM_SEL(inst##l##__VA_ARGS__, \
  					  inst##q##__VA_ARGS__)
  #define __ASM_REG(reg)         __ASM_SEL_RAW(e##reg, r##reg)
  
  #define _ASM_PTR	__ASM_SEL(.long, .quad)
  #define _ASM_ALIGN	__ASM_SEL(.balign 4, .balign 8)
  
  #define _ASM_MOV	__ASM_SIZE(mov)
  #define _ASM_INC	__ASM_SIZE(inc)
  #define _ASM_DEC	__ASM_SIZE(dec)
  #define _ASM_ADD	__ASM_SIZE(add)
  #define _ASM_SUB	__ASM_SIZE(sub)
  #define _ASM_XADD	__ASM_SIZE(xadd)
  #define _ASM_MUL	__ASM_SIZE(mul)
  
  #define _ASM_AX		__ASM_REG(ax)
  #define _ASM_BX		__ASM_REG(bx)
  #define _ASM_CX		__ASM_REG(cx)
  #define _ASM_DX		__ASM_REG(dx)
  #define _ASM_SP		__ASM_REG(sp)
  #define _ASM_BP		__ASM_REG(bp)
  #define _ASM_SI		__ASM_REG(si)
  #define _ASM_DI		__ASM_REG(di)
  
  #ifndef __x86_64__
  /* 32 bit */
  
  #define _ASM_ARG1	_ASM_AX
  #define _ASM_ARG2	_ASM_DX
  #define _ASM_ARG3	_ASM_CX
  
  #define _ASM_ARG1L	eax
  #define _ASM_ARG2L	edx
  #define _ASM_ARG3L	ecx
  
  #define _ASM_ARG1W	ax
  #define _ASM_ARG2W	dx
  #define _ASM_ARG3W	cx
  
  #define _ASM_ARG1B	al
  #define _ASM_ARG2B	dl
  #define _ASM_ARG3B	cl
  
  #else
  /* 64 bit */
  
  #define _ASM_ARG1	_ASM_DI
  #define _ASM_ARG2	_ASM_SI
  #define _ASM_ARG3	_ASM_DX
  #define _ASM_ARG4	_ASM_CX
  #define _ASM_ARG5	r8
  #define _ASM_ARG6	r9
  
  #define _ASM_ARG1Q	rdi
  #define _ASM_ARG2Q	rsi
  #define _ASM_ARG3Q	rdx
  #define _ASM_ARG4Q	rcx
  #define _ASM_ARG5Q	r8
  #define _ASM_ARG6Q	r9
  
  #define _ASM_ARG1L	edi
  #define _ASM_ARG2L	esi
  #define _ASM_ARG3L	edx
  #define _ASM_ARG4L	ecx
  #define _ASM_ARG5L	r8d
  #define _ASM_ARG6L	r9d
  
  #define _ASM_ARG1W	di
  #define _ASM_ARG2W	si
  #define _ASM_ARG3W	dx
  #define _ASM_ARG4W	cx
  #define _ASM_ARG5W	r8w
  #define _ASM_ARG6W	r9w
  
  #define _ASM_ARG1B	dil
  #define _ASM_ARG2B	sil
  #define _ASM_ARG3B	dl
  #define _ASM_ARG4B	cl
  #define _ASM_ARG5B	r8b
  #define _ASM_ARG6B	r9b
  
  #endif
  
  /*
   * Macros to generate condition code outputs from inline assembly,
   * The output operand must be type "bool".
   */
  #ifdef __GCC_ASM_FLAG_OUTPUTS__
  # define CC_SET(c) "\n\t/* output condition code " #c "*/\n"
  # define CC_OUT(c) "=@cc" #c
  #else
  # define CC_SET(c) "\n\tset" #c " %[_cc_" #c "]\n"
  # define CC_OUT(c) [_cc_ ## c] "=qm"
  #endif
  
  /* Exception table entry */
  #ifdef __ASSEMBLY__
  # define _ASM_EXTABLE_HANDLE(from, to, handler)			\
  	.pushsection "__ex_table","a" ;				\
  	.balign 4 ;						\
  	.long (from) - . ;					\
  	.long (to) - . ;					\
  	.long (handler) - . ;					\
  	.popsection
  
  # define _ASM_EXTABLE(from, to)					\
  	_ASM_EXTABLE_HANDLE(from, to, ex_handler_default)
  
  # define _ASM_EXTABLE_UA(from, to)				\
  	_ASM_EXTABLE_HANDLE(from, to, ex_handler_uaccess)
  
  # define _ASM_EXTABLE_CPY(from, to)				\
  	_ASM_EXTABLE_HANDLE(from, to, ex_handler_copy)
  
  # define _ASM_EXTABLE_FAULT(from, to)				\
  	_ASM_EXTABLE_HANDLE(from, to, ex_handler_fault)
  
  # ifdef CONFIG_KPROBES
  #  define _ASM_NOKPROBE(entry)					\
  	.pushsection "_kprobe_blacklist","aw" ;			\
  	_ASM_ALIGN ;						\
  	_ASM_PTR (entry);					\
  	.popsection
  # else
  #  define _ASM_NOKPROBE(entry)
  # endif
  
  #else /* ! __ASSEMBLY__ */
  # define _EXPAND_EXTABLE_HANDLE(x) #x
  # define _ASM_EXTABLE_HANDLE(from, to, handler)			\
  	" .pushsection \"__ex_table\",\"a\"\n"			\
  	" .balign 4\n"						\
  	" .long (" #from ") - .\n"				\
  	" .long (" #to ") - .\n"				\
  	" .long (" _EXPAND_EXTABLE_HANDLE(handler) ") - .\n"	\
  	" .popsection\n"
  
  # define _ASM_EXTABLE(from, to)					\
  	_ASM_EXTABLE_HANDLE(from, to, ex_handler_default)
  
  # define _ASM_EXTABLE_UA(from, to)				\
  	_ASM_EXTABLE_HANDLE(from, to, ex_handler_uaccess)
  
  # define _ASM_EXTABLE_CPY(from, to)				\
  	_ASM_EXTABLE_HANDLE(from, to, ex_handler_copy)
  
  # define _ASM_EXTABLE_FAULT(from, to)				\
  	_ASM_EXTABLE_HANDLE(from, to, ex_handler_fault)
  
  /* For C file, we already have NOKPROBE_SYMBOL macro */
  
  /*
   * This output constraint should be used for any inline asm which has a "call"
   * instruction.  Otherwise the asm may be inserted before the frame pointer
   * gets set up by the containing function.  If you forget to do this, objtool
   * may print a "call without frame pointer save/setup" warning.
   */
  register unsigned long current_stack_pointer asm(_ASM_SP);
  #define ASM_CALL_CONSTRAINT "+r" (current_stack_pointer)
  #endif /* __ASSEMBLY__ */
  
  #endif /* _ASM_X86_ASM_H */
  