1 /* SPDX-License-Identifier: GPL-2.0 */
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__,
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__) ","
16 #define _ASM_BYTES(x, ...) __ASM_FORM(.byte x,##__VA_ARGS__ ;)
20 # define __ASM_SEL(a,b) __ASM_FORM(a)
21 # define __ASM_SEL_RAW(a,b) __ASM_FORM_RAW(a)
24 # define __ASM_SEL(a,b) __ASM_FORM(b)
25 # define __ASM_SEL_RAW(a,b) __ASM_FORM_RAW(b)
28 #define __ASM_SIZE(inst, ...) __ASM_SEL(inst##l##__VA_ARGS__, \
30 #define __ASM_REG(reg) __ASM_SEL_RAW(e##reg, r##reg)
32 #define _ASM_PTR __ASM_SEL(.long, .quad)
33 #define _ASM_ALIGN __ASM_SEL(.balign 4, .balign 8)
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)
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)
55 #define _ASM_ARG1 _ASM_AX
56 #define _ASM_ARG2 _ASM_DX
57 #define _ASM_ARG3 _ASM_CX
59 #define _ASM_ARG1L eax
60 #define _ASM_ARG2L edx
61 #define _ASM_ARG3L ecx
74 #define _ASM_ARG1 _ASM_DI
75 #define _ASM_ARG2 _ASM_SI
76 #define _ASM_ARG3 _ASM_DX
77 #define _ASM_ARG4 _ASM_CX
81 #define _ASM_ARG1Q rdi
82 #define _ASM_ARG2Q rsi
83 #define _ASM_ARG3Q rdx
84 #define _ASM_ARG4Q rcx
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
99 #define _ASM_ARG5W r8w
100 #define _ASM_ARG6W r9w
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
112 * Macros to generate condition code outputs from inline assembly,
113 * The output operand must be type "bool".
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
119 # define CC_SET(c) "\n\tset" #c " %[_cc_" #c "]\n"
120 # define CC_OUT(c) [_cc_ ## c] "=qm"
125 /* Exception table entry */
127 # define _ASM_EXTABLE_HANDLE(from, to, handler) \
128 .pushsection "__ex_table","a" ; \
132 .long (handler) - . ; \
135 # ifdef CONFIG_KPROBES
136 # define _ASM_NOKPROBE(entry) \
137 .pushsection "_kprobe_blacklist","aw" ; \
142 # define _ASM_NOKPROBE(entry)
145 #else /* ! __ASSEMBLY__ */
146 # define _EXPAND_EXTABLE_HANDLE(x) #x
147 # define _ASM_EXTABLE_HANDLE(from, to, handler) \
148 " .pushsection \"__ex_table\",\"a\"\n" \
150 " .long (" #from ") - .\n" \
151 " .long (" #to ") - .\n" \
152 " .long (" _EXPAND_EXTABLE_HANDLE(handler) ") - .\n" \
155 /* For C file, we already have NOKPROBE_SYMBOL macro */
158 * This output constraint should be used for any inline asm which has a "call"
159 * instruction. Otherwise the asm may be inserted before the frame pointer
160 * gets set up by the containing function. If you forget to do this, objtool
161 * may print a "call without frame pointer save/setup" warning.
163 register unsigned long current_stack_pointer asm(_ASM_SP);
164 #define ASM_CALL_CONSTRAINT "+r" (current_stack_pointer)
165 #endif /* __ASSEMBLY__ */
167 #define _ASM_EXTABLE(from, to) \
168 _ASM_EXTABLE_HANDLE(from, to, ex_handler_default)
170 #define _ASM_EXTABLE_UA(from, to) \
171 _ASM_EXTABLE_HANDLE(from, to, ex_handler_uaccess)
173 #define _ASM_EXTABLE_CPY(from, to) \
174 _ASM_EXTABLE_HANDLE(from, to, ex_handler_copy)
176 #define _ASM_EXTABLE_FAULT(from, to) \
177 _ASM_EXTABLE_HANDLE(from, to, ex_handler_fault)
179 #endif /* __KERNEL__ */
181 #endif /* _ASM_X86_ASM_H */