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108 lines
2.6 KiB
108 lines
2.6 KiB
#ifndef _ASM_X86_ASM_H |
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#define _ASM_X86_ASM_H |
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#ifdef __ASSEMBLY__ |
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# define __ASM_FORM(x) x |
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# define __ASM_FORM_RAW(x) x |
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# define __ASM_FORM_COMMA(x) x, |
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#else |
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# define __ASM_FORM(x) " " #x " " |
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# define __ASM_FORM_RAW(x) #x |
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# define __ASM_FORM_COMMA(x) " " #x "," |
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#endif |
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#ifdef CONFIG_X86_32 |
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# define __ASM_SEL(a,b) __ASM_FORM(a) |
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# define __ASM_SEL_RAW(a,b) __ASM_FORM_RAW(a) |
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#else |
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# define __ASM_SEL(a,b) __ASM_FORM(b) |
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# define __ASM_SEL_RAW(a,b) __ASM_FORM_RAW(b) |
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#endif |
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#define __ASM_SIZE(inst, ...) __ASM_SEL(inst##l##__VA_ARGS__, \ |
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inst##q##__VA_ARGS__) |
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#define __ASM_REG(reg) __ASM_SEL_RAW(e##reg, r##reg) |
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#define _ASM_PTR __ASM_SEL(.long, .quad) |
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#define _ASM_ALIGN __ASM_SEL(.balign 4, .balign 8) |
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#define _ASM_MOV __ASM_SIZE(mov) |
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#define _ASM_INC __ASM_SIZE(inc) |
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#define _ASM_DEC __ASM_SIZE(dec) |
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#define _ASM_ADD __ASM_SIZE(add) |
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#define _ASM_SUB __ASM_SIZE(sub) |
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#define _ASM_XADD __ASM_SIZE(xadd) |
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#define _ASM_AX __ASM_REG(ax) |
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#define _ASM_BX __ASM_REG(bx) |
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#define _ASM_CX __ASM_REG(cx) |
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#define _ASM_DX __ASM_REG(dx) |
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#define _ASM_SP __ASM_REG(sp) |
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#define _ASM_BP __ASM_REG(bp) |
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#define _ASM_SI __ASM_REG(si) |
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#define _ASM_DI __ASM_REG(di) |
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/* Exception table entry */ |
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#ifdef __ASSEMBLY__ |
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# define _ASM_EXTABLE(from,to) \ |
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.pushsection "__ex_table","a" ; \ |
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.balign 8 ; \ |
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.long (from) - . ; \ |
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.long (to) - . ; \ |
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.popsection |
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# define _ASM_EXTABLE_EX(from,to) \ |
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.pushsection "__ex_table","a" ; \ |
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.balign 8 ; \ |
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.long (from) - . ; \ |
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.long (to) - . + 0x7ffffff0 ; \ |
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.popsection |
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# define _ASM_NOKPROBE(entry) \ |
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.pushsection "_kprobe_blacklist","aw" ; \ |
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_ASM_ALIGN ; \ |
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_ASM_PTR (entry); \ |
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.popsection |
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.macro ALIGN_DESTINATION |
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/* check for bad alignment of destination */ |
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movl %edi,%ecx |
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andl $7,%ecx |
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jz 102f /* already aligned */ |
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subl $8,%ecx |
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negl %ecx |
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subl %ecx,%edx |
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100: movb (%rsi),%al |
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101: movb %al,(%rdi) |
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incq %rsi |
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incq %rdi |
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decl %ecx |
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jnz 100b |
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102: |
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.section .fixup,"ax" |
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103: addl %ecx,%edx /* ecx is zerorest also */ |
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jmp copy_user_handle_tail |
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.previous |
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_ASM_EXTABLE(100b,103b) |
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_ASM_EXTABLE(101b,103b) |
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.endm |
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#else |
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# define _ASM_EXTABLE(from,to) \ |
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" .pushsection \"__ex_table\",\"a\"\n" \ |
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" .balign 8\n" \ |
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" .long (" #from ") - .\n" \ |
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" .long (" #to ") - .\n" \ |
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" .popsection\n" |
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# define _ASM_EXTABLE_EX(from,to) \ |
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" .pushsection \"__ex_table\",\"a\"\n" \ |
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" .balign 8\n" \ |
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" .long (" #from ") - .\n" \ |
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" .long (" #to ") - . + 0x7ffffff0\n" \ |
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" .popsection\n" |
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/* For C file, we already have NOKPROBE_SYMBOL macro */ |
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#endif |
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#endif /* _ASM_X86_ASM_H */
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