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 # include <asm/extable_fixup_types.h> 126 127 /* Exception table entry */ 128 #ifdef __ASSEMBLY__ 129 130 # define _ASM_EXTABLE_TYPE(from, to, type) \ 131 .pushsection "__ex_table","a" ; \ 132 .balign 4 ; \ 133 .long (from) - . ; \ 134 .long (to) - . ; \ 135 .long type ; \ 136 .popsection 137 138 # ifdef CONFIG_KPROBES 139 # define _ASM_NOKPROBE(entry) \ 140 .pushsection "_kprobe_blacklist","aw" ; \ 141 _ASM_ALIGN ; \ 142 _ASM_PTR (entry); \ 143 .popsection 144 # else 145 # define _ASM_NOKPROBE(entry) 146 # endif 147 148 #else /* ! __ASSEMBLY__ */ 149 150 # define DEFINE_EXTABLE_TYPE_REG \ 151 ".macro extable_type_reg type:req reg:req\n" \ 152 ".set .Lfound, 0\n" \ 153 ".set .Lregnr, 0\n" \ 154 ".irp rs,rax,rcx,rdx,rbx,rsp,rbp,rsi,rdi,r8,r9,r10,r11,r12,r13,r14,r15\n" \ 155 ".ifc \\reg, %%\\rs\n" \ 156 ".set .Lfound, .Lfound+1\n" \ 157 ".long \\type + (.Lregnr << 8)\n" \ 158 ".endif\n" \ 159 ".set .Lregnr, .Lregnr+1\n" \ 160 ".endr\n" \ 161 ".set .Lregnr, 0\n" \ 162 ".irp rs,eax,ecx,edx,ebx,esp,ebp,esi,edi,r8d,r9d,r10d,r11d,r12d,r13d,r14d,r15d\n" \ 163 ".ifc \\reg, %%\\rs\n" \ 164 ".set .Lfound, .Lfound+1\n" \ 165 ".long \\type + (.Lregnr << 8)\n" \ 166 ".endif\n" \ 167 ".set .Lregnr, .Lregnr+1\n" \ 168 ".endr\n" \ 169 ".if (.Lfound != 1)\n" \ 170 ".error \"extable_type_reg: bad register argument\"\n" \ 171 ".endif\n" \ 172 ".endm\n" 173 174 # define UNDEFINE_EXTABLE_TYPE_REG \ 175 ".purgem extable_type_reg\n" 176 177 # define _ASM_EXTABLE_TYPE(from, to, type) \ 178 " .pushsection \"__ex_table\",\"a\"\n" \ 179 " .balign 4\n" \ 180 " .long (" #from ") - .\n" \ 181 " .long (" #to ") - .\n" \ 182 " .long " __stringify(type) " \n" \ 183 " .popsection\n" 184 185 # define _ASM_EXTABLE_TYPE_REG(from, to, type, reg) \ 186 " .pushsection \"__ex_table\",\"a\"\n" \ 187 " .balign 4\n" \ 188 " .long (" #from ") - .\n" \ 189 " .long (" #to ") - .\n" \ 190 DEFINE_EXTABLE_TYPE_REG \ 191 "extable_type_reg reg=" __stringify(reg) ", type=" __stringify(type) " \n"\ 192 UNDEFINE_EXTABLE_TYPE_REG \ 193 " .popsection\n" 194 195 /* For C file, we already have NOKPROBE_SYMBOL macro */ 196 197 /* 198 * This output constraint should be used for any inline asm which has a "call" 199 * instruction. Otherwise the asm may be inserted before the frame pointer 200 * gets set up by the containing function. If you forget to do this, objtool 201 * may print a "call without frame pointer save/setup" warning. 202 */ 203 register unsigned long current_stack_pointer asm(_ASM_SP); 204 #define ASM_CALL_CONSTRAINT "+r" (current_stack_pointer) 205 #endif /* __ASSEMBLY__ */ 206 207 #define _ASM_EXTABLE(from, to) \ 208 _ASM_EXTABLE_TYPE(from, to, EX_TYPE_DEFAULT) 209 210 #define _ASM_EXTABLE_UA(from, to) \ 211 _ASM_EXTABLE_TYPE(from, to, EX_TYPE_UACCESS) 212 213 #define _ASM_EXTABLE_CPY(from, to) \ 214 _ASM_EXTABLE_TYPE(from, to, EX_TYPE_COPY) 215 216 #define _ASM_EXTABLE_FAULT(from, to) \ 217 _ASM_EXTABLE_TYPE(from, to, EX_TYPE_FAULT) 218 219 #endif /* __KERNEL__ */ 220 #endif /* _ASM_X86_ASM_H */ 221