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 /* Exception table entry */ 46 #ifdef __ASSEMBLY__ 47 # define _ASM_EXTABLE_HANDLE(from, to, handler) \ 48 .pushsection "__ex_table","a" ; \ 49 .balign 4 ; \ 50 .long (from) - . ; \ 51 .long (to) - . ; \ 52 .long (handler) - . ; \ 53 .popsection 54 55 # define _ASM_EXTABLE(from, to) \ 56 _ASM_EXTABLE_HANDLE(from, to, ex_handler_default) 57 58 # define _ASM_EXTABLE_FAULT(from, to) \ 59 _ASM_EXTABLE_HANDLE(from, to, ex_handler_fault) 60 61 # define _ASM_EXTABLE_EX(from, to) \ 62 _ASM_EXTABLE_HANDLE(from, to, ex_handler_ext) 63 64 # define _ASM_NOKPROBE(entry) \ 65 .pushsection "_kprobe_blacklist","aw" ; \ 66 _ASM_ALIGN ; \ 67 _ASM_PTR (entry); \ 68 .popsection 69 70 .macro ALIGN_DESTINATION 71 /* check for bad alignment of destination */ 72 movl %edi,%ecx 73 andl $7,%ecx 74 jz 102f /* already aligned */ 75 subl $8,%ecx 76 negl %ecx 77 subl %ecx,%edx 78 100: movb (%rsi),%al 79 101: movb %al,(%rdi) 80 incq %rsi 81 incq %rdi 82 decl %ecx 83 jnz 100b 84 102: 85 .section .fixup,"ax" 86 103: addl %ecx,%edx /* ecx is zerorest also */ 87 jmp copy_user_handle_tail 88 .previous 89 90 _ASM_EXTABLE(100b,103b) 91 _ASM_EXTABLE(101b,103b) 92 .endm 93 94 #else 95 # define _EXPAND_EXTABLE_HANDLE(x) #x 96 # define _ASM_EXTABLE_HANDLE(from, to, handler) \ 97 " .pushsection \"__ex_table\",\"a\"\n" \ 98 " .balign 4\n" \ 99 " .long (" #from ") - .\n" \ 100 " .long (" #to ") - .\n" \ 101 " .long (" _EXPAND_EXTABLE_HANDLE(handler) ") - .\n" \ 102 " .popsection\n" 103 104 # define _ASM_EXTABLE(from, to) \ 105 _ASM_EXTABLE_HANDLE(from, to, ex_handler_default) 106 107 # define _ASM_EXTABLE_FAULT(from, to) \ 108 _ASM_EXTABLE_HANDLE(from, to, ex_handler_fault) 109 110 # define _ASM_EXTABLE_EX(from, to) \ 111 _ASM_EXTABLE_HANDLE(from, to, ex_handler_ext) 112 113 /* For C file, we already have NOKPROBE_SYMBOL macro */ 114 #endif 115 116 #endif /* _ASM_X86_ASM_H */ 117