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