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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
1965aae3 PA |
2 | #ifndef _ASM_X86_ASM_H |
3 | #define _ASM_X86_ASM_H | |
e845c06b | 4 | |
e6e07d8a JF |
5 | #ifdef __ASSEMBLY__ |
6 | # define __ASM_FORM(x) x | |
3e9b2327 | 7 | # define __ASM_FORM_RAW(x) x |
a750036f | 8 | # define __ASM_FORM_COMMA(x) x, |
e6e07d8a JF |
9 | #else |
10 | # define __ASM_FORM(x) " " #x " " | |
3e9b2327 | 11 | # define __ASM_FORM_RAW(x) #x |
a750036f | 12 | # define __ASM_FORM_COMMA(x) " " #x "," |
e6e07d8a | 13 | #endif |
8ee5797a | 14 | |
520a13c5 JP |
15 | #ifndef __x86_64__ |
16 | /* 32 bit */ | |
e6e07d8a | 17 | # define __ASM_SEL(a,b) __ASM_FORM(a) |
3e9b2327 | 18 | # define __ASM_SEL_RAW(a,b) __ASM_FORM_RAW(a) |
e845c06b | 19 | #else |
520a13c5 | 20 | /* 64 bit */ |
e6e07d8a | 21 | # define __ASM_SEL(a,b) __ASM_FORM(b) |
3e9b2327 | 22 | # define __ASM_SEL_RAW(a,b) __ASM_FORM_RAW(b) |
e6e07d8a | 23 | #endif |
e845c06b | 24 | |
4625cd63 JB |
25 | #define __ASM_SIZE(inst, ...) __ASM_SEL(inst##l##__VA_ARGS__, \ |
26 | inst##q##__VA_ARGS__) | |
3e9b2327 | 27 | #define __ASM_REG(reg) __ASM_SEL_RAW(e##reg, r##reg) |
e845c06b | 28 | |
e6e07d8a JF |
29 | #define _ASM_PTR __ASM_SEL(.long, .quad) |
30 | #define _ASM_ALIGN __ASM_SEL(.balign 4, .balign 8) | |
8ee5797a | 31 | |
8df9676d | 32 | #define _ASM_MOV __ASM_SIZE(mov) |
e6e07d8a JF |
33 | #define _ASM_INC __ASM_SIZE(inc) |
34 | #define _ASM_DEC __ASM_SIZE(dec) | |
35 | #define _ASM_ADD __ASM_SIZE(add) | |
36 | #define _ASM_SUB __ASM_SIZE(sub) | |
37 | #define _ASM_XADD __ASM_SIZE(xadd) | |
121843eb | 38 | #define _ASM_MUL __ASM_SIZE(mul) |
8df9676d | 39 | |
40faf463 | 40 | #define _ASM_AX __ASM_REG(ax) |
2528de43 GC |
41 | #define _ASM_BX __ASM_REG(bx) |
42 | #define _ASM_CX __ASM_REG(cx) | |
40faf463 | 43 | #define _ASM_DX __ASM_REG(dx) |
8df9676d PA |
44 | #define _ASM_SP __ASM_REG(sp) |
45 | #define _ASM_BP __ASM_REG(bp) | |
46 | #define _ASM_SI __ASM_REG(si) | |
47 | #define _ASM_DI __ASM_REG(di) | |
e845c06b | 48 | |
7e3c814e PA |
49 | #ifndef __x86_64__ |
50 | /* 32 bit */ | |
51 | ||
52 | #define _ASM_ARG1 _ASM_AX | |
53 | #define _ASM_ARG2 _ASM_DX | |
54 | #define _ASM_ARG3 _ASM_CX | |
55 | ||
56 | #define _ASM_ARG1L eax | |
57 | #define _ASM_ARG2L edx | |
58 | #define _ASM_ARG3L ecx | |
59 | ||
60 | #define _ASM_ARG1W ax | |
61 | #define _ASM_ARG2W dx | |
62 | #define _ASM_ARG3W cx | |
63 | ||
64 | #define _ASM_ARG1B al | |
65 | #define _ASM_ARG2B dl | |
66 | #define _ASM_ARG3B cl | |
67 | ||
68 | #else | |
69 | /* 64 bit */ | |
70 | ||
71 | #define _ASM_ARG1 _ASM_DI | |
72 | #define _ASM_ARG2 _ASM_SI | |
73 | #define _ASM_ARG3 _ASM_DX | |
74 | #define _ASM_ARG4 _ASM_CX | |
75 | #define _ASM_ARG5 r8 | |
76 | #define _ASM_ARG6 r9 | |
77 | ||
78 | #define _ASM_ARG1Q rdi | |
79 | #define _ASM_ARG2Q rsi | |
80 | #define _ASM_ARG3Q rdx | |
81 | #define _ASM_ARG4Q rcx | |
82 | #define _ASM_ARG5Q r8 | |
83 | #define _ASM_ARG6Q r9 | |
84 | ||
85 | #define _ASM_ARG1L edi | |
86 | #define _ASM_ARG2L esi | |
87 | #define _ASM_ARG3L edx | |
88 | #define _ASM_ARG4L ecx | |
89 | #define _ASM_ARG5L r8d | |
90 | #define _ASM_ARG6L r9d | |
91 | ||
92 | #define _ASM_ARG1W di | |
93 | #define _ASM_ARG2W si | |
94 | #define _ASM_ARG3W dx | |
95 | #define _ASM_ARG4W cx | |
96 | #define _ASM_ARG5W r8w | |
97 | #define _ASM_ARG6W r9w | |
98 | ||
99 | #define _ASM_ARG1B dil | |
100 | #define _ASM_ARG2B sil | |
101 | #define _ASM_ARG3B dl | |
102 | #define _ASM_ARG4B cl | |
103 | #define _ASM_ARG5B r8b | |
104 | #define _ASM_ARG6B r9b | |
105 | ||
106 | #endif | |
107 | ||
ff3554b4 PA |
108 | /* |
109 | * Macros to generate condition code outputs from inline assembly, | |
110 | * The output operand must be type "bool". | |
111 | */ | |
112 | #ifdef __GCC_ASM_FLAG_OUTPUTS__ | |
113 | # define CC_SET(c) "\n\t/* output condition code " #c "*/\n" | |
114 | # define CC_OUT(c) "=@cc" #c | |
115 | #else | |
116 | # define CC_SET(c) "\n\tset" #c " %[_cc_" #c "]\n" | |
117 | # define CC_OUT(c) [_cc_ ## c] "=qm" | |
118 | #endif | |
119 | ||
a34746bc | 120 | /* Exception table entry */ |
709972b1 | 121 | #ifdef __ASSEMBLY__ |
548acf19 | 122 | # define _ASM_EXTABLE_HANDLE(from, to, handler) \ |
535c0c34 | 123 | .pushsection "__ex_table","a" ; \ |
548acf19 | 124 | .balign 4 ; \ |
70627654 PA |
125 | .long (from) - . ; \ |
126 | .long (to) - . ; \ | |
548acf19 | 127 | .long (handler) - . ; \ |
535c0c34 PA |
128 | .popsection |
129 | ||
548acf19 TL |
130 | # define _ASM_EXTABLE(from, to) \ |
131 | _ASM_EXTABLE_HANDLE(from, to, ex_handler_default) | |
132 | ||
133 | # define _ASM_EXTABLE_FAULT(from, to) \ | |
134 | _ASM_EXTABLE_HANDLE(from, to, ex_handler_fault) | |
135 | ||
136 | # define _ASM_EXTABLE_EX(from, to) \ | |
137 | _ASM_EXTABLE_HANDLE(from, to, ex_handler_ext) | |
376e2424 | 138 | |
7a46ec0e KC |
139 | # define _ASM_EXTABLE_REFCOUNT(from, to) \ |
140 | _ASM_EXTABLE_HANDLE(from, to, ex_handler_refcount) | |
141 | ||
376e2424 MH |
142 | # define _ASM_NOKPROBE(entry) \ |
143 | .pushsection "_kprobe_blacklist","aw" ; \ | |
144 | _ASM_ALIGN ; \ | |
145 | _ASM_PTR (entry); \ | |
146 | .popsection | |
9e6b13f7 BP |
147 | |
148 | .macro ALIGN_DESTINATION | |
149 | /* check for bad alignment of destination */ | |
150 | movl %edi,%ecx | |
151 | andl $7,%ecx | |
152 | jz 102f /* already aligned */ | |
153 | subl $8,%ecx | |
154 | negl %ecx | |
155 | subl %ecx,%edx | |
156 | 100: movb (%rsi),%al | |
157 | 101: movb %al,(%rdi) | |
158 | incq %rsi | |
159 | incq %rdi | |
160 | decl %ecx | |
161 | jnz 100b | |
162 | 102: | |
163 | .section .fixup,"ax" | |
164 | 103: addl %ecx,%edx /* ecx is zerorest also */ | |
165 | jmp copy_user_handle_tail | |
166 | .previous | |
167 | ||
168 | _ASM_EXTABLE(100b,103b) | |
169 | _ASM_EXTABLE(101b,103b) | |
170 | .endm | |
171 | ||
709972b1 | 172 | #else |
548acf19 TL |
173 | # define _EXPAND_EXTABLE_HANDLE(x) #x |
174 | # define _ASM_EXTABLE_HANDLE(from, to, handler) \ | |
535c0c34 | 175 | " .pushsection \"__ex_table\",\"a\"\n" \ |
548acf19 | 176 | " .balign 4\n" \ |
70627654 PA |
177 | " .long (" #from ") - .\n" \ |
178 | " .long (" #to ") - .\n" \ | |
548acf19 | 179 | " .long (" _EXPAND_EXTABLE_HANDLE(handler) ") - .\n" \ |
535c0c34 PA |
180 | " .popsection\n" |
181 | ||
548acf19 TL |
182 | # define _ASM_EXTABLE(from, to) \ |
183 | _ASM_EXTABLE_HANDLE(from, to, ex_handler_default) | |
184 | ||
185 | # define _ASM_EXTABLE_FAULT(from, to) \ | |
186 | _ASM_EXTABLE_HANDLE(from, to, ex_handler_fault) | |
187 | ||
188 | # define _ASM_EXTABLE_EX(from, to) \ | |
189 | _ASM_EXTABLE_HANDLE(from, to, ex_handler_ext) | |
190 | ||
7a46ec0e KC |
191 | # define _ASM_EXTABLE_REFCOUNT(from, to) \ |
192 | _ASM_EXTABLE_HANDLE(from, to, ex_handler_refcount) | |
193 | ||
376e2424 | 194 | /* For C file, we already have NOKPROBE_SYMBOL macro */ |
709972b1 | 195 | #endif |
a34746bc | 196 | |
f5caf621 | 197 | #ifndef __ASSEMBLY__ |
ca26cffa | 198 | #ifndef __BPF__ |
f5caf621 JP |
199 | /* |
200 | * This output constraint should be used for any inline asm which has a "call" | |
201 | * instruction. Otherwise the asm may be inserted before the frame pointer | |
202 | * gets set up by the containing function. If you forget to do this, objtool | |
203 | * may print a "call without frame pointer save/setup" warning. | |
204 | */ | |
196bd485 AR |
205 | register unsigned long current_stack_pointer asm(_ASM_SP); |
206 | #define ASM_CALL_CONSTRAINT "+r" (current_stack_pointer) | |
f5caf621 | 207 | #endif |
ca26cffa | 208 | #endif |
f5caf621 | 209 | |
1965aae3 | 210 | #endif /* _ASM_X86_ASM_H */ |