1/* SPDX-License-Identifier: GPL-2.0 */ 2#ifndef _ASM_X86_ASM_H 3#define _ASM_X86_ASM_H 4 5#ifdef __ASSEMBLY__ 6# define __ASM_FORM(x, ...) x,## __VA_ARGS__ 7# define __ASM_FORM_RAW(x, ...) x,## __VA_ARGS__ 8# define __ASM_FORM_COMMA(x, ...) x,## __VA_ARGS__, 9#else 10#include <linux/stringify.h> 11# define __ASM_FORM(x, ...) " " __stringify(x,##__VA_ARGS__) " " 12# define __ASM_FORM_RAW(x, ...) __stringify(x,##__VA_ARGS__) 13# define __ASM_FORM_COMMA(x, ...) " " __stringify(x,##__VA_ARGS__) "," 14#endif 15 16#define _ASM_BYTES(x, ...) __ASM_FORM(.byte x,##__VA_ARGS__ ;) 17 18#ifndef __x86_64__ 19/* 32 bit */ 20# define __ASM_SEL(a,b) __ASM_FORM(a) 21# define __ASM_SEL_RAW(a,b) __ASM_FORM_RAW(a) 22#else 23/* 64 bit */ 24# define __ASM_SEL(a,b) __ASM_FORM(b) 25# define __ASM_SEL_RAW(a,b) __ASM_FORM_RAW(b) 26#endif 27 28#define __ASM_SIZE(inst, ...) __ASM_SEL(inst##l##__VA_ARGS__, \ 29 inst##q##__VA_ARGS__) 30#define __ASM_REG(reg) __ASM_SEL_RAW(e##reg, r##reg) 31 32#define _ASM_PTR __ASM_SEL(.long, .quad) 33#define _ASM_ALIGN __ASM_SEL(.balign 4, .balign 8) 34 35#define _ASM_MOV __ASM_SIZE(mov) 36#define _ASM_INC __ASM_SIZE(inc) 37#define _ASM_DEC __ASM_SIZE(dec) 38#define _ASM_ADD __ASM_SIZE(add) 39#define _ASM_SUB __ASM_SIZE(sub) 40#define _ASM_XADD __ASM_SIZE(xadd) 41#define _ASM_MUL __ASM_SIZE(mul) 42 43#define _ASM_AX __ASM_REG(ax) 44#define _ASM_BX __ASM_REG(bx) 45#define _ASM_CX __ASM_REG(cx) 46#define _ASM_DX __ASM_REG(dx) 47#define _ASM_SP __ASM_REG(sp) 48#define _ASM_BP __ASM_REG(bp) 49#define _ASM_SI __ASM_REG(si) 50#define _ASM_DI __ASM_REG(di) 51 52#ifndef __x86_64__ 53/* 32 bit */ 54 55#define _ASM_ARG1 _ASM_AX 56#define _ASM_ARG2 _ASM_DX 57#define _ASM_ARG3 _ASM_CX 58 59#define _ASM_ARG1L eax 60#define _ASM_ARG2L edx 61#define _ASM_ARG3L ecx 62 63#define _ASM_ARG1W ax 64#define _ASM_ARG2W dx 65#define _ASM_ARG3W cx 66 67#define _ASM_ARG1B al 68#define _ASM_ARG2B dl 69#define _ASM_ARG3B cl 70 71#else 72/* 64 bit */ 73 74#define _ASM_ARG1 _ASM_DI 75#define _ASM_ARG2 _ASM_SI 76#define _ASM_ARG3 _ASM_DX 77#define _ASM_ARG4 _ASM_CX 78#define _ASM_ARG5 r8 79#define _ASM_ARG6 r9 80 81#define _ASM_ARG1Q rdi 82#define _ASM_ARG2Q rsi 83#define _ASM_ARG3Q rdx 84#define _ASM_ARG4Q rcx 85#define _ASM_ARG5Q r8 86#define _ASM_ARG6Q r9 87 88#define _ASM_ARG1L edi 89#define _ASM_ARG2L esi 90#define _ASM_ARG3L edx 91#define _ASM_ARG4L ecx 92#define _ASM_ARG5L r8d 93#define _ASM_ARG6L r9d 94 95#define _ASM_ARG1W di 96#define _ASM_ARG2W si 97#define _ASM_ARG3W dx 98#define _ASM_ARG4W cx 99#define _ASM_ARG5W r8w 100#define _ASM_ARG6W r9w 101 102#define _ASM_ARG1B dil 103#define _ASM_ARG2B sil 104#define _ASM_ARG3B dl 105#define _ASM_ARG4B cl 106#define _ASM_ARG5B r8b 107#define _ASM_ARG6B r9b 108 109#endif 110 111/* 112 * Macros to generate condition code outputs from inline assembly, 113 * The output operand must be type "bool". 114 */ 115#ifdef __GCC_ASM_FLAG_OUTPUTS__ 116# define CC_SET(c) "\n\t/* output condition code " #c "*/\n" 117# define CC_OUT(c) "=@cc" #c 118#else 119# define CC_SET(c) "\n\tset" #c " %[_cc_" #c "]\n" 120# define CC_OUT(c) [_cc_ ## c] "=qm" 121#endif 122 123#ifdef __KERNEL__ 124 125/* Exception table entry */ 126#ifdef __ASSEMBLY__ 127# define _ASM_EXTABLE_HANDLE(from, to, handler) \ 128 .pushsection "__ex_table","a" ; \ 129 .balign 4 ; \ 130 .long (from) - . ; \ 131 .long (to) - . ; \ 132 .long (handler) - . ; \ 133 .popsection 134 135# define _ASM_EXTABLE(from, to) \ 136 _ASM_EXTABLE_HANDLE(from, to, ex_handler_default) 137 138# define _ASM_EXTABLE_UA(from, to) \ 139 _ASM_EXTABLE_HANDLE(from, to, ex_handler_uaccess) 140 141# define _ASM_EXTABLE_CPY(from, to) \ 142 _ASM_EXTABLE_HANDLE(from, to, ex_handler_copy) 143 144# define _ASM_EXTABLE_FAULT(from, to) \ 145 _ASM_EXTABLE_HANDLE(from, to, ex_handler_fault) 146 147# ifdef CONFIG_KPROBES 148# define _ASM_NOKPROBE(entry) \ 149 .pushsection "_kprobe_blacklist","aw" ; \ 150 _ASM_ALIGN ; \ 151 _ASM_PTR (entry); \ 152 .popsection 153# else 154# define _ASM_NOKPROBE(entry) 155# endif 156 157#else /* ! __ASSEMBLY__ */ 158# define _EXPAND_EXTABLE_HANDLE(x) #x 159# define _ASM_EXTABLE_HANDLE(from, to, handler) \ 160 " .pushsection \"__ex_table\",\"a\"\n" \ 161 " .balign 4\n" \ 162 " .long (" #from ") - .\n" \ 163 " .long (" #to ") - .\n" \ 164 " .long (" _EXPAND_EXTABLE_HANDLE(handler) ") - .\n" \ 165 " .popsection\n" 166 167# define _ASM_EXTABLE(from, to) \ 168 _ASM_EXTABLE_HANDLE(from, to, ex_handler_default) 169 170# define _ASM_EXTABLE_UA(from, to) \ 171 _ASM_EXTABLE_HANDLE(from, to, ex_handler_uaccess) 172 173# define _ASM_EXTABLE_CPY(from, to) \ 174 _ASM_EXTABLE_HANDLE(from, to, ex_handler_copy) 175 176# define _ASM_EXTABLE_FAULT(from, to) \ 177 _ASM_EXTABLE_HANDLE(from, to, ex_handler_fault) 178 179/* For C file, we already have NOKPROBE_SYMBOL macro */ 180 181/* 182 * This output constraint should be used for any inline asm which has a "call" 183 * instruction. Otherwise the asm may be inserted before the frame pointer 184 * gets set up by the containing function. If you forget to do this, objtool 185 * may print a "call without frame pointer save/setup" warning. 186 */ 187register unsigned long current_stack_pointer asm(_ASM_SP); 188#define ASM_CALL_CONSTRAINT "+r" (current_stack_pointer) 189#endif /* __ASSEMBLY__ */ 190 191#endif /* __KERNEL__ */ 192 193#endif /* _ASM_X86_ASM_H */ 194