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 | # define __ASM_REGPFX % |
10 | #else |
11 | #include <linux/stringify.h> |
12 | # define __ASM_FORM(x, ...) " " __stringify(x,##__VA_ARGS__) " " |
13 | # define __ASM_FORM_RAW(x, ...) __stringify(x,##__VA_ARGS__) |
14 | # define __ASM_FORM_COMMA(x, ...) " " __stringify(x,##__VA_ARGS__) "," |
15 | # define __ASM_REGPFX %% |
16 | #endif |
17 | |
18 | #define _ASM_BYTES(x, ...) __ASM_FORM(.byte x,##__VA_ARGS__ ;) |
19 | |
20 | #ifndef __x86_64__ |
21 | /* 32 bit */ |
22 | # define __ASM_SEL(a,b) __ASM_FORM(a) |
23 | # define __ASM_SEL_RAW(a,b) __ASM_FORM_RAW(a) |
24 | #else |
25 | /* 64 bit */ |
26 | # define __ASM_SEL(a,b) __ASM_FORM(b) |
27 | # define __ASM_SEL_RAW(a,b) __ASM_FORM_RAW(b) |
28 | #endif |
29 | |
30 | #define __ASM_SIZE(inst, ...) __ASM_SEL(inst##l##__VA_ARGS__, \ |
31 | inst##q##__VA_ARGS__) |
32 | #define __ASM_REG(reg) __ASM_SEL_RAW(e##reg, r##reg) |
33 | |
34 | #define _ASM_PTR __ASM_SEL(.long, .quad) |
35 | #define _ASM_ALIGN __ASM_SEL(.balign 4, .balign 8) |
36 | |
37 | #define _ASM_MOV __ASM_SIZE(mov) |
38 | #define _ASM_INC __ASM_SIZE(inc) |
39 | #define _ASM_DEC __ASM_SIZE(dec) |
40 | #define _ASM_ADD __ASM_SIZE(add) |
41 | #define _ASM_SUB __ASM_SIZE(sub) |
42 | #define _ASM_XADD __ASM_SIZE(xadd) |
43 | #define _ASM_MUL __ASM_SIZE(mul) |
44 | |
45 | #define _ASM_AX __ASM_REG(ax) |
46 | #define _ASM_BX __ASM_REG(bx) |
47 | #define _ASM_CX __ASM_REG(cx) |
48 | #define _ASM_DX __ASM_REG(dx) |
49 | #define _ASM_SP __ASM_REG(sp) |
50 | #define _ASM_BP __ASM_REG(bp) |
51 | #define _ASM_SI __ASM_REG(si) |
52 | #define _ASM_DI __ASM_REG(di) |
53 | |
54 | /* Adds a (%rip) suffix on 64 bits only; for immediate memory references */ |
55 | #define _ASM_RIP(x) __ASM_SEL_RAW(x, x (__ASM_REGPFX rip)) |
56 | |
57 | #ifndef __x86_64__ |
58 | /* 32 bit */ |
59 | |
60 | #define _ASM_ARG1 _ASM_AX |
61 | #define _ASM_ARG2 _ASM_DX |
62 | #define _ASM_ARG3 _ASM_CX |
63 | |
64 | #define _ASM_ARG1L eax |
65 | #define _ASM_ARG2L edx |
66 | #define _ASM_ARG3L ecx |
67 | |
68 | #define _ASM_ARG1W ax |
69 | #define _ASM_ARG2W dx |
70 | #define _ASM_ARG3W cx |
71 | |
72 | #define _ASM_ARG1B al |
73 | #define _ASM_ARG2B dl |
74 | #define _ASM_ARG3B cl |
75 | |
76 | #else |
77 | /* 64 bit */ |
78 | |
79 | #define _ASM_ARG1 _ASM_DI |
80 | #define _ASM_ARG2 _ASM_SI |
81 | #define _ASM_ARG3 _ASM_DX |
82 | #define _ASM_ARG4 _ASM_CX |
83 | #define _ASM_ARG5 r8 |
84 | #define _ASM_ARG6 r9 |
85 | |
86 | #define _ASM_ARG1Q rdi |
87 | #define _ASM_ARG2Q rsi |
88 | #define _ASM_ARG3Q rdx |
89 | #define _ASM_ARG4Q rcx |
90 | #define _ASM_ARG5Q r8 |
91 | #define _ASM_ARG6Q r9 |
92 | |
93 | #define _ASM_ARG1L edi |
94 | #define _ASM_ARG2L esi |
95 | #define _ASM_ARG3L edx |
96 | #define _ASM_ARG4L ecx |
97 | #define _ASM_ARG5L r8d |
98 | #define _ASM_ARG6L r9d |
99 | |
100 | #define _ASM_ARG1W di |
101 | #define _ASM_ARG2W si |
102 | #define _ASM_ARG3W dx |
103 | #define _ASM_ARG4W cx |
104 | #define _ASM_ARG5W r8w |
105 | #define _ASM_ARG6W r9w |
106 | |
107 | #define _ASM_ARG1B dil |
108 | #define _ASM_ARG2B sil |
109 | #define _ASM_ARG3B dl |
110 | #define _ASM_ARG4B cl |
111 | #define _ASM_ARG5B r8b |
112 | #define _ASM_ARG6B r9b |
113 | |
114 | #endif |
115 | |
116 | /* |
117 | * Macros to generate condition code outputs from inline assembly, |
118 | * The output operand must be type "bool". |
119 | */ |
120 | #ifdef __GCC_ASM_FLAG_OUTPUTS__ |
121 | # define CC_SET(c) "\n\t/* output condition code " #c "*/\n" |
122 | # define CC_OUT(c) "=@cc" #c |
123 | #else |
124 | # define CC_SET(c) "\n\tset" #c " %[_cc_" #c "]\n" |
125 | # define CC_OUT(c) [_cc_ ## c] "=qm" |
126 | #endif |
127 | |
128 | #ifdef __KERNEL__ |
129 | |
130 | # include <asm/extable_fixup_types.h> |
131 | |
132 | /* Exception table entry */ |
133 | #ifdef __ASSEMBLY__ |
134 | |
135 | # define _ASM_EXTABLE_TYPE(from, to, type) \ |
136 | .pushsection "__ex_table","a" ; \ |
137 | .balign 4 ; \ |
138 | .long (from) - . ; \ |
139 | .long (to) - . ; \ |
140 | .long type ; \ |
141 | .popsection |
142 | |
143 | # ifdef CONFIG_KPROBES |
144 | # define _ASM_NOKPROBE(entry) \ |
145 | .pushsection "_kprobe_blacklist","aw" ; \ |
146 | _ASM_ALIGN ; \ |
147 | _ASM_PTR (entry); \ |
148 | .popsection |
149 | # else |
150 | # define _ASM_NOKPROBE(entry) |
151 | # endif |
152 | |
153 | #else /* ! __ASSEMBLY__ */ |
154 | |
155 | # define DEFINE_EXTABLE_TYPE_REG \ |
156 | ".macro extable_type_reg type:req reg:req\n" \ |
157 | ".set .Lfound, 0\n" \ |
158 | ".set .Lregnr, 0\n" \ |
159 | ".irp rs,rax,rcx,rdx,rbx,rsp,rbp,rsi,rdi,r8,r9,r10,r11,r12,r13,r14,r15\n" \ |
160 | ".ifc \\reg, %%\\rs\n" \ |
161 | ".set .Lfound, .Lfound+1\n" \ |
162 | ".long \\type + (.Lregnr << 8)\n" \ |
163 | ".endif\n" \ |
164 | ".set .Lregnr, .Lregnr+1\n" \ |
165 | ".endr\n" \ |
166 | ".set .Lregnr, 0\n" \ |
167 | ".irp rs,eax,ecx,edx,ebx,esp,ebp,esi,edi,r8d,r9d,r10d,r11d,r12d,r13d,r14d,r15d\n" \ |
168 | ".ifc \\reg, %%\\rs\n" \ |
169 | ".set .Lfound, .Lfound+1\n" \ |
170 | ".long \\type + (.Lregnr << 8)\n" \ |
171 | ".endif\n" \ |
172 | ".set .Lregnr, .Lregnr+1\n" \ |
173 | ".endr\n" \ |
174 | ".if (.Lfound != 1)\n" \ |
175 | ".error \"extable_type_reg: bad register argument\"\n" \ |
176 | ".endif\n" \ |
177 | ".endm\n" |
178 | |
179 | # define UNDEFINE_EXTABLE_TYPE_REG \ |
180 | ".purgem extable_type_reg\n" |
181 | |
182 | # define _ASM_EXTABLE_TYPE(from, to, type) \ |
183 | " .pushsection \"__ex_table\",\"a\"\n" \ |
184 | " .balign 4\n" \ |
185 | " .long (" #from ") - .\n" \ |
186 | " .long (" #to ") - .\n" \ |
187 | " .long " __stringify(type) " \n" \ |
188 | " .popsection\n" |
189 | |
190 | # define _ASM_EXTABLE_TYPE_REG(from, to, type, reg) \ |
191 | " .pushsection \"__ex_table\",\"a\"\n" \ |
192 | " .balign 4\n" \ |
193 | " .long (" #from ") - .\n" \ |
194 | " .long (" #to ") - .\n" \ |
195 | DEFINE_EXTABLE_TYPE_REG \ |
196 | "extable_type_reg reg=" __stringify(reg) ", type=" __stringify(type) " \n"\ |
197 | UNDEFINE_EXTABLE_TYPE_REG \ |
198 | " .popsection\n" |
199 | |
200 | /* For C file, we already have NOKPROBE_SYMBOL macro */ |
201 | |
202 | /* |
203 | * This output constraint should be used for any inline asm which has a "call" |
204 | * instruction. Otherwise the asm may be inserted before the frame pointer |
205 | * gets set up by the containing function. If you forget to do this, objtool |
206 | * may print a "call without frame pointer save/setup" warning. |
207 | */ |
208 | register unsigned long current_stack_pointer asm(_ASM_SP); |
209 | #define ASM_CALL_CONSTRAINT "+r" (current_stack_pointer) |
210 | #endif /* __ASSEMBLY__ */ |
211 | |
212 | #define _ASM_EXTABLE(from, to) \ |
213 | _ASM_EXTABLE_TYPE(from, to, EX_TYPE_DEFAULT) |
214 | |
215 | #define _ASM_EXTABLE_UA(from, to) \ |
216 | _ASM_EXTABLE_TYPE(from, to, EX_TYPE_UACCESS) |
217 | |
218 | #define _ASM_EXTABLE_CPY(from, to) \ |
219 | _ASM_EXTABLE_TYPE(from, to, EX_TYPE_COPY) |
220 | |
221 | #define _ASM_EXTABLE_FAULT(from, to) \ |
222 | _ASM_EXTABLE_TYPE(from, to, EX_TYPE_FAULT) |
223 | |
224 | #endif /* __KERNEL__ */ |
225 | #endif /* _ASM_X86_ASM_H */ |
226 | |