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