https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;h=8e83ca675f522d132ca35d847aa35f310951702e
commit 8e83ca675f522d132ca35d847aa35f310951702e Author: Corinna Vinschen <[email protected]> AuthorDate: Tue Dec 20 09:56:39 2022 +0100 Commit: Corinna Vinschen <[email protected]> CommitDate: Tue Dec 20 10:13:59 2022 +0100 Cygwin: add local machine/asm.h header This header supports including BSD assembler sources. Signed-off-by: Corinna Vinschen <[email protected]> Diff: --- winsup/cygwin/local_includes/machine/asm.h | 78 ++++++++++++++++++++++++++++++ 1 file changed, 78 insertions(+) diff --git a/winsup/cygwin/local_includes/machine/asm.h b/winsup/cygwin/local_includes/machine/asm.h new file mode 100644 index 000000000000..12b0285396ff --- /dev/null +++ b/winsup/cygwin/local_includes/machine/asm.h @@ -0,0 +1,78 @@ +#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 */
