197 lines
5.1 KiB
C
197 lines
5.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef _ASM_X86_ASM_H
|
|
#define _ASM_X86_ASM_H
|
|
|
|
#ifdef __ASSEMBLY__
|
|
# define __ASM_FORM(x, ...) x,## __VA_ARGS__
|
|
# define __ASM_FORM_RAW(x, ...) x,## __VA_ARGS__
|
|
# define __ASM_FORM_COMMA(x, ...) x,## __VA_ARGS__,
|
|
# define __ASM_REGPFX %
|
|
#else
|
|
#include <linux/stringify.h>
|
|
# define __ASM_FORM(x, ...) " " __stringify(x,##__VA_ARGS__) " "
|
|
# define __ASM_FORM_RAW(x, ...) __stringify(x,##__VA_ARGS__)
|
|
# define __ASM_FORM_COMMA(x, ...) " " __stringify(x,##__VA_ARGS__) ","
|
|
# define __ASM_REGPFX %%
|
|
#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)
|
|
|
|
/* Adds a (%rip) suffix on 64 bits only; for immediate memory references */
|
|
#define _ASM_RIP(x) __ASM_SEL_RAW(x, x (__ASM_REGPFX rip))
|
|
|
|
#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_FAULT(from, to) \
|
|
_ASM_EXTABLE_HANDLE(from, to, ex_handler_fault)
|
|
|
|
# define _ASM_EXTABLE_EX(from, to) \
|
|
_ASM_EXTABLE_HANDLE(from, to, ex_handler_ext)
|
|
|
|
# define _ASM_EXTABLE_REFCOUNT(from, to) \
|
|
_ASM_EXTABLE_HANDLE(from, to, ex_handler_refcount)
|
|
|
|
# define _ASM_NOKPROBE(entry) \
|
|
.pushsection "_kprobe_blacklist","aw" ; \
|
|
_ASM_ALIGN ; \
|
|
_ASM_PTR (entry); \
|
|
.popsection
|
|
|
|
#else
|
|
# 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_FAULT(from, to) \
|
|
_ASM_EXTABLE_HANDLE(from, to, ex_handler_fault)
|
|
|
|
# define _ASM_EXTABLE_EX(from, to) \
|
|
_ASM_EXTABLE_HANDLE(from, to, ex_handler_ext)
|
|
|
|
# define _ASM_EXTABLE_REFCOUNT(from, to) \
|
|
_ASM_EXTABLE_HANDLE(from, to, ex_handler_refcount)
|
|
|
|
/* For C file, we already have NOKPROBE_SYMBOL macro */
|
|
#endif
|
|
|
|
#ifndef __ASSEMBLY__
|
|
/*
|
|
* 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
|
|
|
|
#endif /* _ASM_X86_ASM_H */
|