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(from,to) \ 48 .pushsection "__ex_table","a" ; \ 49 .balign 8 ; \ 50 .long (from) - . ; \ 51 .long (to) - . ; \ 52 .popsection 53 54 # define _ASM_EXTABLE_EX(from,to) \ 55 .pushsection "__ex_table","a" ; \ 56 .balign 8 ; \ 57 .long (from) - . ; \ 58 .long (to) - . + 0x7ffffff0 ; \ 59 .popsection 60 61 # define _ASM_NOKPROBE(entry) \ 62 .pushsection "_kprobe_blacklist","aw" ; \ 63 _ASM_ALIGN ; \ 64 _ASM_PTR (entry); \ 65 .popsection 66 67 .macro ALIGN_DESTINATION 68 /* check for bad alignment of destination */ 69 movl %edi,%ecx 70 andl $7,%ecx 71 jz 102f /* already aligned */ 72 subl $8,%ecx 73 negl %ecx 74 subl %ecx,%edx 75 100: movb (%rsi),%al 76 101: movb %al,(%rdi) 77 incq %rsi 78 incq %rdi 79 decl %ecx 80 jnz 100b 81 102: 82 .section .fixup,"ax" 83 103: addl %ecx,%edx /* ecx is zerorest also */ 84 jmp copy_user_handle_tail 85 .previous 86 87 _ASM_EXTABLE(100b,103b) 88 _ASM_EXTABLE(101b,103b) 89 .endm 90 91 #else 92 # define _ASM_EXTABLE(from,to) \ 93 " .pushsection \"__ex_table\",\"a\"\n" \ 94 " .balign 8\n" \ 95 " .long (" #from ") - .\n" \ 96 " .long (" #to ") - .\n" \ 97 " .popsection\n" 98 99 # define _ASM_EXTABLE_EX(from,to) \ 100 " .pushsection \"__ex_table\",\"a\"\n" \ 101 " .balign 8\n" \ 102 " .long (" #from ") - .\n" \ 103 " .long (" #to ") - . + 0x7ffffff0\n" \ 104 " .popsection\n" 105 /* For C file, we already have NOKPROBE_SYMBOL macro */ 106 #endif 107 108 #endif /* _ASM_X86_ASM_H */ 109