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 36 #define _ASM_AX __ASM_REG(ax) 37 #define _ASM_BX __ASM_REG(bx) 38 #define _ASM_CX __ASM_REG(cx) 39 #define _ASM_DX __ASM_REG(dx) 40 #define _ASM_SP __ASM_REG(sp) 41 #define _ASM_BP __ASM_REG(bp) 42 #define _ASM_SI __ASM_REG(si) 43 #define _ASM_DI __ASM_REG(di) 44 45 /* 46 * Macros to generate condition code outputs from inline assembly, 47 * The output operand must be type "bool". 48 */ 49 #ifdef __GCC_ASM_FLAG_OUTPUTS__ 50 # define CC_SET(c) "\n\t/* output condition code " #c "*/\n" 51 # define CC_OUT(c) "=@cc" #c 52 #else 53 # define CC_SET(c) "\n\tset" #c " %[_cc_" #c "]\n" 54 # define CC_OUT(c) [_cc_ ## c] "=qm" 55 #endif 56 57 /* Exception table entry */ 58 #ifdef __ASSEMBLY__ 59 # define _ASM_EXTABLE_HANDLE(from, to, handler) \ 60 .pushsection "__ex_table","a" ; \ 61 .balign 4 ; \ 62 .long (from) - . ; \ 63 .long (to) - . ; \ 64 .long (handler) - . ; \ 65 .popsection 66 67 # define _ASM_EXTABLE(from, to) \ 68 _ASM_EXTABLE_HANDLE(from, to, ex_handler_default) 69 70 # define _ASM_EXTABLE_FAULT(from, to) \ 71 _ASM_EXTABLE_HANDLE(from, to, ex_handler_fault) 72 73 # define _ASM_EXTABLE_EX(from, to) \ 74 _ASM_EXTABLE_HANDLE(from, to, ex_handler_ext) 75 76 # define _ASM_NOKPROBE(entry) \ 77 .pushsection "_kprobe_blacklist","aw" ; \ 78 _ASM_ALIGN ; \ 79 _ASM_PTR (entry); \ 80 .popsection 81 82 .macro ALIGN_DESTINATION 83 /* check for bad alignment of destination */ 84 movl %edi,%ecx 85 andl $7,%ecx 86 jz 102f /* already aligned */ 87 subl $8,%ecx 88 negl %ecx 89 subl %ecx,%edx 90 100: movb (%rsi),%al 91 101: movb %al,(%rdi) 92 incq %rsi 93 incq %rdi 94 decl %ecx 95 jnz 100b 96 102: 97 .section .fixup,"ax" 98 103: addl %ecx,%edx /* ecx is zerorest also */ 99 jmp copy_user_handle_tail 100 .previous 101 102 _ASM_EXTABLE(100b,103b) 103 _ASM_EXTABLE(101b,103b) 104 .endm 105 106 #else 107 # define _EXPAND_EXTABLE_HANDLE(x) #x 108 # define _ASM_EXTABLE_HANDLE(from, to, handler) \ 109 " .pushsection \"__ex_table\",\"a\"\n" \ 110 " .balign 4\n" \ 111 " .long (" #from ") - .\n" \ 112 " .long (" #to ") - .\n" \ 113 " .long (" _EXPAND_EXTABLE_HANDLE(handler) ") - .\n" \ 114 " .popsection\n" 115 116 # define _ASM_EXTABLE(from, to) \ 117 _ASM_EXTABLE_HANDLE(from, to, ex_handler_default) 118 119 # define _ASM_EXTABLE_FAULT(from, to) \ 120 _ASM_EXTABLE_HANDLE(from, to, ex_handler_fault) 121 122 # define _ASM_EXTABLE_EX(from, to) \ 123 _ASM_EXTABLE_HANDLE(from, to, ex_handler_ext) 124 125 /* For C file, we already have NOKPROBE_SYMBOL macro */ 126 #endif 127 128 #endif /* _ASM_X86_ASM_H */ 129