79 lines
1.7 KiB
C
79 lines
1.7 KiB
C
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#ifndef _MACHINE_ASM_H
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#define _MACHINE_ASM_H
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/* Macros for importing FreeBSD/OpenBSD/NetBSD assembler code. */
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#ifdef __x86_64__
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#define _ALIGN_TEXT .p2align 4,0x90
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/* The NATIVE_ENTRY macro just adds the required gas macros. It can be
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used stand-alone if the code is so short that it's better to change the
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argument registeres rather than adding the code overhead. */
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#define NATIVE_ENTRY(__sym) \
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.text ;\
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.p2align 4 ;\
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.globl __sym ;\
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.seh_proc __sym ;\
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__sym: \
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/* The ENTRY macros cover the difference in argument passing between
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MS-ABI and SysV ABI. Note especially that RSI/RDI are always saved
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in the stack shadow space defined by the MS_ABI, and restored when
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calling ret (see the "ret" macro below). */
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#define __ENTRY(__sym) \
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NATIVE_ENTRY(__sym) \
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movq %rsi,8(%rsp) ;\
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movq %rdi,16(%rsp) ;
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/* ENTRY1 for functions with 1 arg */
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#define ENTRY1(__sym) \
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__ENTRY(__sym) \
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movq %rcx,%rdi ;\
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.seh_endprologue ;
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/* ENTRY2 for functions with 2 args */
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#define ENTRY2(__sym) \
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__ENTRY(__sym) \
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movq %rcx,%rdi ;\
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movq %rdx,%rsi ;\
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.seh_endprologue ;
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/* ENTRY3 for functions with 3 args */
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#define ENTRY3(__sym) \
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__ENTRY(__sym) \
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movq %rcx,%rdi ;\
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movq %rdx,%rsi ;\
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movq %r8,%rdx ;\
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.seh_endprologue ;
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/* ENTRY4 for functions with 4 args */
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#define ENTRY4(__sym) \
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__ENTRY(__sym) \
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movq %rcx,%rdi ;\
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movq %rdx,%rsi ;\
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movq %r8,%rdx ;\
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movq %r9,%rcx ;\
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.seh_endprologue ;
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#define ret \
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movq 8(%rsp),%rsi ;\
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movq 16(%rsp),%rdi ;\
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retq ;\
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#define END(__sym) \
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.seh_endproc
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#endif /* __x86_64__ */
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#define __FBSDID(s) \
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.ident s
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#define STRONG_ALIAS(__a,__s) \
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.globl __a ;\
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__a = __s ;
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#endif /* _MACHINE_ASM_H */
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