226 lines
5.9 KiB
C
226 lines
5.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#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,## __VA_ARGS__
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# define __ASM_FORM_RAW(x, ...) x,## __VA_ARGS__
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# define __ASM_FORM_COMMA(x, ...) x,## __VA_ARGS__,
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# define __ASM_REGPFX %
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#else
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#include <linux/stringify.h>
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# define __ASM_FORM(x, ...) " " __stringify(x,##__VA_ARGS__) " "
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# define __ASM_FORM_RAW(x, ...) __stringify(x,##__VA_ARGS__)
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# define __ASM_FORM_COMMA(x, ...) " " __stringify(x,##__VA_ARGS__) ","
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# define __ASM_REGPFX %%
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#endif
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#define _ASM_BYTES(x, ...) __ASM_FORM(.byte x,##__VA_ARGS__ ;)
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#ifndef __x86_64__
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/* 32 bit */
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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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/* 64 bit */
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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_MUL __ASM_SIZE(mul)
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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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/* Adds a (%rip) suffix on 64 bits only; for immediate memory references */
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#define _ASM_RIP(x) __ASM_SEL_RAW(x, x (__ASM_REGPFX rip))
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#ifndef __x86_64__
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/* 32 bit */
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#define _ASM_ARG1 _ASM_AX
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#define _ASM_ARG2 _ASM_DX
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#define _ASM_ARG3 _ASM_CX
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#define _ASM_ARG1L eax
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#define _ASM_ARG2L edx
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#define _ASM_ARG3L ecx
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#define _ASM_ARG1W ax
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#define _ASM_ARG2W dx
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#define _ASM_ARG3W cx
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#define _ASM_ARG1B al
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#define _ASM_ARG2B dl
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#define _ASM_ARG3B cl
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#else
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/* 64 bit */
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#define _ASM_ARG1 _ASM_DI
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#define _ASM_ARG2 _ASM_SI
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#define _ASM_ARG3 _ASM_DX
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#define _ASM_ARG4 _ASM_CX
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#define _ASM_ARG5 r8
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#define _ASM_ARG6 r9
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#define _ASM_ARG1Q rdi
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#define _ASM_ARG2Q rsi
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#define _ASM_ARG3Q rdx
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#define _ASM_ARG4Q rcx
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#define _ASM_ARG5Q r8
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#define _ASM_ARG6Q r9
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#define _ASM_ARG1L edi
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#define _ASM_ARG2L esi
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#define _ASM_ARG3L edx
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#define _ASM_ARG4L ecx
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#define _ASM_ARG5L r8d
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#define _ASM_ARG6L r9d
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#define _ASM_ARG1W di
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#define _ASM_ARG2W si
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#define _ASM_ARG3W dx
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#define _ASM_ARG4W cx
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#define _ASM_ARG5W r8w
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#define _ASM_ARG6W r9w
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#define _ASM_ARG1B dil
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#define _ASM_ARG2B sil
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#define _ASM_ARG3B dl
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#define _ASM_ARG4B cl
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#define _ASM_ARG5B r8b
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#define _ASM_ARG6B r9b
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#endif
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/*
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* Macros to generate condition code outputs from inline assembly,
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* The output operand must be type "bool".
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*/
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#ifdef __GCC_ASM_FLAG_OUTPUTS__
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# define CC_SET(c) "\n\t/* output condition code " #c "*/\n"
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# define CC_OUT(c) "=@cc" #c
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#else
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# define CC_SET(c) "\n\tset" #c " %[_cc_" #c "]\n"
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# define CC_OUT(c) [_cc_ ## c] "=qm"
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#endif
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#ifdef __KERNEL__
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# include <asm/extable_fixup_types.h>
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/* Exception table entry */
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#ifdef __ASSEMBLY__
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# define _ASM_EXTABLE_TYPE(from, to, type) \
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.pushsection "__ex_table","a" ; \
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.balign 4 ; \
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.long (from) - . ; \
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.long (to) - . ; \
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.long type ; \
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.popsection
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# ifdef CONFIG_KPROBES
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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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# else
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# define _ASM_NOKPROBE(entry)
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# endif
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#else /* ! __ASSEMBLY__ */
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# define DEFINE_EXTABLE_TYPE_REG \
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".macro extable_type_reg type:req reg:req\n" \
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".set .Lfound, 0\n" \
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".set .Lregnr, 0\n" \
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".irp rs,rax,rcx,rdx,rbx,rsp,rbp,rsi,rdi,r8,r9,r10,r11,r12,r13,r14,r15\n" \
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".ifc \\reg, %%\\rs\n" \
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".set .Lfound, .Lfound+1\n" \
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".long \\type + (.Lregnr << 8)\n" \
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".endif\n" \
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".set .Lregnr, .Lregnr+1\n" \
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".endr\n" \
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".set .Lregnr, 0\n" \
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".irp rs,eax,ecx,edx,ebx,esp,ebp,esi,edi,r8d,r9d,r10d,r11d,r12d,r13d,r14d,r15d\n" \
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".ifc \\reg, %%\\rs\n" \
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".set .Lfound, .Lfound+1\n" \
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".long \\type + (.Lregnr << 8)\n" \
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".endif\n" \
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".set .Lregnr, .Lregnr+1\n" \
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".endr\n" \
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".if (.Lfound != 1)\n" \
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".error \"extable_type_reg: bad register argument\"\n" \
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".endif\n" \
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".endm\n"
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# define UNDEFINE_EXTABLE_TYPE_REG \
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".purgem extable_type_reg\n"
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# define _ASM_EXTABLE_TYPE(from, to, type) \
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" .pushsection \"__ex_table\",\"a\"\n" \
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" .balign 4\n" \
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" .long (" #from ") - .\n" \
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" .long (" #to ") - .\n" \
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" .long " __stringify(type) " \n" \
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" .popsection\n"
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# define _ASM_EXTABLE_TYPE_REG(from, to, type, reg) \
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" .pushsection \"__ex_table\",\"a\"\n" \
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" .balign 4\n" \
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" .long (" #from ") - .\n" \
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" .long (" #to ") - .\n" \
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DEFINE_EXTABLE_TYPE_REG \
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"extable_type_reg reg=" __stringify(reg) ", type=" __stringify(type) " \n"\
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UNDEFINE_EXTABLE_TYPE_REG \
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" .popsection\n"
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/* For C file, we already have NOKPROBE_SYMBOL macro */
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/*
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* This output constraint should be used for any inline asm which has a "call"
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* instruction. Otherwise the asm may be inserted before the frame pointer
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* gets set up by the containing function. If you forget to do this, objtool
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* may print a "call without frame pointer save/setup" warning.
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*/
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register unsigned long current_stack_pointer asm(_ASM_SP);
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#define ASM_CALL_CONSTRAINT "+r" (current_stack_pointer)
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#endif /* __ASSEMBLY__ */
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#define _ASM_EXTABLE(from, to) \
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_ASM_EXTABLE_TYPE(from, to, EX_TYPE_DEFAULT)
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#define _ASM_EXTABLE_UA(from, to) \
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_ASM_EXTABLE_TYPE(from, to, EX_TYPE_UACCESS)
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#define _ASM_EXTABLE_CPY(from, to) \
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_ASM_EXTABLE_TYPE(from, to, EX_TYPE_COPY)
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#define _ASM_EXTABLE_FAULT(from, to) \
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_ASM_EXTABLE_TYPE(from, to, EX_TYPE_FAULT)
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#endif /* __KERNEL__ */
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#endif /* _ASM_X86_ASM_H */
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