1 #ifndef _ASM_X86_ASM_H 2 #define _ASM_X86_ASM_H 3 4 #ifdef __ASSEMBLY__ 5 # define __ASM_FORM(x) x 6 # define __ASM_FORM_RAW(x) x 7 # define __ASM_FORM_COMMA(x) x, 8 #else 9 # define __ASM_FORM(x) " " #x " " 10 # define __ASM_FORM_RAW(x) #x 11 # define __ASM_FORM_COMMA(x) " " #x "," 12 #endif 13 14 #ifdef CONFIG_X86_32 15 # define __ASM_SEL(a,b) __ASM_FORM(a) 16 # define __ASM_SEL_RAW(a,b) __ASM_FORM_RAW(a) 17 #else 18 # define __ASM_SEL(a,b) __ASM_FORM(b) 19 # define __ASM_SEL_RAW(a,b) __ASM_FORM_RAW(b) 20 #endif 21 22 #define __ASM_SIZE(inst, ...) __ASM_SEL(inst##l##__VA_ARGS__, \ 23 inst##q##__VA_ARGS__) 24 #define __ASM_REG(reg) __ASM_SEL_RAW(e##reg, r##reg) 25 26 #define _ASM_PTR __ASM_SEL(.long, .quad) 27 #define _ASM_ALIGN __ASM_SEL(.balign 4, .balign 8) 28 29 #define _ASM_MOV __ASM_SIZE(mov) 30 #define _ASM_INC __ASM_SIZE(inc) 31 #define _ASM_DEC __ASM_SIZE(dec) 32 #define _ASM_ADD __ASM_SIZE(add) 33 #define _ASM_SUB __ASM_SIZE(sub) 34 #define _ASM_XADD __ASM_SIZE(xadd) 35 #define _ASM_MUL __ASM_SIZE(mul) 36 37 #define _ASM_AX __ASM_REG(ax) 38 #define _ASM_BX __ASM_REG(bx) 39 #define _ASM_CX __ASM_REG(cx) 40 #define _ASM_DX __ASM_REG(dx) 41 #define _ASM_SP __ASM_REG(sp) 42 #define _ASM_BP __ASM_REG(bp) 43 #define _ASM_SI __ASM_REG(si) 44 #define _ASM_DI __ASM_REG(di) 45 46 /* 47 * Macros to generate condition code outputs from inline assembly, 48 * The output operand must be type "bool". 49 */ 50 #ifdef __GCC_ASM_FLAG_OUTPUTS__ 51 # define CC_SET(c) "\n\t/* output condition code " #c "*/\n" 52 # define CC_OUT(c) "=@cc" #c 53 #else 54 # define CC_SET(c) "\n\tset" #c " %[_cc_" #c "]\n" 55 # define CC_OUT(c) [_cc_ ## c] "=qm" 56 #endif 57 58 /* Exception table entry */ 59 #ifdef __ASSEMBLY__ 60 # define _ASM_EXTABLE_HANDLE(from, to, handler) \ 61 .pushsection "__ex_table","a" ; \ 62 .balign 4 ; \ 63 .long (from) - . ; \ 64 .long (to) - . ; \ 65 .long (handler) - . ; \ 66 .popsection 67 68 # define _ASM_EXTABLE(from, to) \ 69 _ASM_EXTABLE_HANDLE(from, to, ex_handler_default) 70 71 # define _ASM_EXTABLE_FAULT(from, to) \ 72 _ASM_EXTABLE_HANDLE(from, to, ex_handler_fault) 73 74 # define _ASM_EXTABLE_EX(from, to) \ 75 _ASM_EXTABLE_HANDLE(from, to, ex_handler_ext) 76 77 # define _ASM_EXTABLE_REFCOUNT(from, to) \ 78 _ASM_EXTABLE_HANDLE(from, to, ex_handler_refcount) 79 80 # define _ASM_NOKPROBE(entry) \ 81 .pushsection "_kprobe_blacklist","aw" ; \ 82 _ASM_ALIGN ; \ 83 _ASM_PTR (entry); \ 84 .popsection 85 86 .macro ALIGN_DESTINATION 87 /* check for bad alignment of destination */ 88 movl %edi,%ecx 89 andl $7,%ecx 90 jz 102f /* already aligned */ 91 subl $8,%ecx 92 negl %ecx 93 subl %ecx,%edx 94 100: movb (%rsi),%al 95 101: movb %al,(%rdi) 96 incq %rsi 97 incq %rdi 98 decl %ecx 99 jnz 100b 100 102: 101 .section .fixup,"ax" 102 103: addl %ecx,%edx /* ecx is zerorest also */ 103 jmp copy_user_handle_tail 104 .previous 105 106 _ASM_EXTABLE(100b,103b) 107 _ASM_EXTABLE(101b,103b) 108 .endm 109 110 #else 111 # define _EXPAND_EXTABLE_HANDLE(x) #x 112 # define _ASM_EXTABLE_HANDLE(from, to, handler) \ 113 " .pushsection \"__ex_table\",\"a\"\n" \ 114 " .balign 4\n" \ 115 " .long (" #from ") - .\n" \ 116 " .long (" #to ") - .\n" \ 117 " .long (" _EXPAND_EXTABLE_HANDLE(handler) ") - .\n" \ 118 " .popsection\n" 119 120 # define _ASM_EXTABLE(from, to) \ 121 _ASM_EXTABLE_HANDLE(from, to, ex_handler_default) 122 123 # define _ASM_EXTABLE_FAULT(from, to) \ 124 _ASM_EXTABLE_HANDLE(from, to, ex_handler_fault) 125 126 # define _ASM_EXTABLE_EX(from, to) \ 127 _ASM_EXTABLE_HANDLE(from, to, ex_handler_ext) 128 129 # define _ASM_EXTABLE_REFCOUNT(from, to) \ 130 _ASM_EXTABLE_HANDLE(from, to, ex_handler_refcount) 131 132 /* For C file, we already have NOKPROBE_SYMBOL macro */ 133 #endif 134 135 #endif /* _ASM_X86_ASM_H */ 136