Loading...
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#ifndef __ASSEMBLY__
117#ifndef __pic__
118static __always_inline __pure void *rip_rel_ptr(void *p)
119{
120 asm("leaq %c1(%%rip), %0" : "=r"(p) : "i"(p));
121
122 return p;
123}
124#define RIP_REL_REF(var) (*(typeof(&(var)))rip_rel_ptr(&(var)))
125#else
126#define RIP_REL_REF(var) (var)
127#endif
128#endif
129
130/*
131 * Macros to generate condition code outputs from inline assembly,
132 * The output operand must be type "bool".
133 */
134#ifdef __GCC_ASM_FLAG_OUTPUTS__
135# define CC_SET(c) "\n\t/* output condition code " #c "*/\n"
136# define CC_OUT(c) "=@cc" #c
137#else
138# define CC_SET(c) "\n\tset" #c " %[_cc_" #c "]\n"
139# define CC_OUT(c) [_cc_ ## c] "=qm"
140#endif
141
142#ifdef __KERNEL__
143
144# include <asm/extable_fixup_types.h>
145
146/* Exception table entry */
147#ifdef __ASSEMBLY__
148
149# define _ASM_EXTABLE_TYPE(from, to, type) \
150 .pushsection "__ex_table","a" ; \
151 .balign 4 ; \
152 .long (from) - . ; \
153 .long (to) - . ; \
154 .long type ; \
155 .popsection
156
157# ifdef CONFIG_KPROBES
158# define _ASM_NOKPROBE(entry) \
159 .pushsection "_kprobe_blacklist","aw" ; \
160 _ASM_ALIGN ; \
161 _ASM_PTR (entry); \
162 .popsection
163# else
164# define _ASM_NOKPROBE(entry)
165# endif
166
167#else /* ! __ASSEMBLY__ */
168
169# define DEFINE_EXTABLE_TYPE_REG \
170 ".macro extable_type_reg type:req reg:req\n" \
171 ".set .Lfound, 0\n" \
172 ".set .Lregnr, 0\n" \
173 ".irp rs,rax,rcx,rdx,rbx,rsp,rbp,rsi,rdi,r8,r9,r10,r11,r12,r13,r14,r15\n" \
174 ".ifc \\reg, %%\\rs\n" \
175 ".set .Lfound, .Lfound+1\n" \
176 ".long \\type + (.Lregnr << 8)\n" \
177 ".endif\n" \
178 ".set .Lregnr, .Lregnr+1\n" \
179 ".endr\n" \
180 ".set .Lregnr, 0\n" \
181 ".irp rs,eax,ecx,edx,ebx,esp,ebp,esi,edi,r8d,r9d,r10d,r11d,r12d,r13d,r14d,r15d\n" \
182 ".ifc \\reg, %%\\rs\n" \
183 ".set .Lfound, .Lfound+1\n" \
184 ".long \\type + (.Lregnr << 8)\n" \
185 ".endif\n" \
186 ".set .Lregnr, .Lregnr+1\n" \
187 ".endr\n" \
188 ".if (.Lfound != 1)\n" \
189 ".error \"extable_type_reg: bad register argument\"\n" \
190 ".endif\n" \
191 ".endm\n"
192
193# define UNDEFINE_EXTABLE_TYPE_REG \
194 ".purgem extable_type_reg\n"
195
196# define _ASM_EXTABLE_TYPE(from, to, type) \
197 " .pushsection \"__ex_table\",\"a\"\n" \
198 " .balign 4\n" \
199 " .long (" #from ") - .\n" \
200 " .long (" #to ") - .\n" \
201 " .long " __stringify(type) " \n" \
202 " .popsection\n"
203
204# define _ASM_EXTABLE_TYPE_REG(from, to, type, reg) \
205 " .pushsection \"__ex_table\",\"a\"\n" \
206 " .balign 4\n" \
207 " .long (" #from ") - .\n" \
208 " .long (" #to ") - .\n" \
209 DEFINE_EXTABLE_TYPE_REG \
210 "extable_type_reg reg=" __stringify(reg) ", type=" __stringify(type) " \n"\
211 UNDEFINE_EXTABLE_TYPE_REG \
212 " .popsection\n"
213
214/* For C file, we already have NOKPROBE_SYMBOL macro */
215
216/*
217 * This output constraint should be used for any inline asm which has a "call"
218 * instruction. Otherwise the asm may be inserted before the frame pointer
219 * gets set up by the containing function. If you forget to do this, objtool
220 * may print a "call without frame pointer save/setup" warning.
221 */
222register unsigned long current_stack_pointer asm(_ASM_SP);
223#define ASM_CALL_CONSTRAINT "+r" (current_stack_pointer)
224#endif /* __ASSEMBLY__ */
225
226#define _ASM_EXTABLE(from, to) \
227 _ASM_EXTABLE_TYPE(from, to, EX_TYPE_DEFAULT)
228
229#define _ASM_EXTABLE_UA(from, to) \
230 _ASM_EXTABLE_TYPE(from, to, EX_TYPE_UACCESS)
231
232#define _ASM_EXTABLE_FAULT(from, to) \
233 _ASM_EXTABLE_TYPE(from, to, EX_TYPE_FAULT)
234
235#endif /* __KERNEL__ */
236#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
7# define __ASM_FORM_RAW(x) x
8# define __ASM_FORM_COMMA(x) x,
9#else
10# define __ASM_FORM(x) " " #x " "
11# define __ASM_FORM_RAW(x) #x
12# define __ASM_FORM_COMMA(x) " " #x ","
13#endif
14
15#ifndef __x86_64__
16/* 32 bit */
17# define __ASM_SEL(a,b) __ASM_FORM(a)
18# define __ASM_SEL_RAW(a,b) __ASM_FORM_RAW(a)
19#else
20/* 64 bit */
21# define __ASM_SEL(a,b) __ASM_FORM(b)
22# define __ASM_SEL_RAW(a,b) __ASM_FORM_RAW(b)
23#endif
24
25#define __ASM_SIZE(inst, ...) __ASM_SEL(inst##l##__VA_ARGS__, \
26 inst##q##__VA_ARGS__)
27#define __ASM_REG(reg) __ASM_SEL_RAW(e##reg, r##reg)
28
29#define _ASM_PTR __ASM_SEL(.long, .quad)
30#define _ASM_ALIGN __ASM_SEL(.balign 4, .balign 8)
31
32#define _ASM_MOV __ASM_SIZE(mov)
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)
38#define _ASM_MUL __ASM_SIZE(mul)
39
40#define _ASM_AX __ASM_REG(ax)
41#define _ASM_BX __ASM_REG(bx)
42#define _ASM_CX __ASM_REG(cx)
43#define _ASM_DX __ASM_REG(dx)
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)
48
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
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
120/* Exception table entry */
121#ifdef __ASSEMBLY__
122# define _ASM_EXTABLE_HANDLE(from, to, handler) \
123 .pushsection "__ex_table","a" ; \
124 .balign 4 ; \
125 .long (from) - . ; \
126 .long (to) - . ; \
127 .long (handler) - . ; \
128 .popsection
129
130# define _ASM_EXTABLE(from, to) \
131 _ASM_EXTABLE_HANDLE(from, to, ex_handler_default)
132
133# define _ASM_EXTABLE_UA(from, to) \
134 _ASM_EXTABLE_HANDLE(from, to, ex_handler_uaccess)
135
136# define _ASM_EXTABLE_FAULT(from, to) \
137 _ASM_EXTABLE_HANDLE(from, to, ex_handler_fault)
138
139# define _ASM_EXTABLE_EX(from, to) \
140 _ASM_EXTABLE_HANDLE(from, to, ex_handler_ext)
141
142# define _ASM_EXTABLE_REFCOUNT(from, to) \
143 _ASM_EXTABLE_HANDLE(from, to, ex_handler_refcount)
144
145# define _ASM_NOKPROBE(entry) \
146 .pushsection "_kprobe_blacklist","aw" ; \
147 _ASM_ALIGN ; \
148 _ASM_PTR (entry); \
149 .popsection
150
151#else
152# define _EXPAND_EXTABLE_HANDLE(x) #x
153# define _ASM_EXTABLE_HANDLE(from, to, handler) \
154 " .pushsection \"__ex_table\",\"a\"\n" \
155 " .balign 4\n" \
156 " .long (" #from ") - .\n" \
157 " .long (" #to ") - .\n" \
158 " .long (" _EXPAND_EXTABLE_HANDLE(handler) ") - .\n" \
159 " .popsection\n"
160
161# define _ASM_EXTABLE(from, to) \
162 _ASM_EXTABLE_HANDLE(from, to, ex_handler_default)
163
164# define _ASM_EXTABLE_UA(from, to) \
165 _ASM_EXTABLE_HANDLE(from, to, ex_handler_uaccess)
166
167# define _ASM_EXTABLE_FAULT(from, to) \
168 _ASM_EXTABLE_HANDLE(from, to, ex_handler_fault)
169
170# define _ASM_EXTABLE_EX(from, to) \
171 _ASM_EXTABLE_HANDLE(from, to, ex_handler_ext)
172
173# define _ASM_EXTABLE_REFCOUNT(from, to) \
174 _ASM_EXTABLE_HANDLE(from, to, ex_handler_refcount)
175
176/* For C file, we already have NOKPROBE_SYMBOL macro */
177#endif
178
179#ifndef __ASSEMBLY__
180/*
181 * This output constraint should be used for any inline asm which has a "call"
182 * instruction. Otherwise the asm may be inserted before the frame pointer
183 * gets set up by the containing function. If you forget to do this, objtool
184 * may print a "call without frame pointer save/setup" warning.
185 */
186register unsigned long current_stack_pointer asm(_ASM_SP);
187#define ASM_CALL_CONSTRAINT "+r" (current_stack_pointer)
188#endif
189
190#endif /* _ASM_X86_ASM_H */