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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 */
208register 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 */
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 */