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Diffstat (limited to 'sys/amd64/include/asm.h')
| -rw-r--r-- | sys/amd64/include/asm.h | 115 |
1 files changed, 115 insertions, 0 deletions
diff --git a/sys/amd64/include/asm.h b/sys/amd64/include/asm.h new file mode 100644 index 000000000000..6535e44d5cef --- /dev/null +++ b/sys/amd64/include/asm.h @@ -0,0 +1,115 @@ +/*- + * SPDX-License-Identifier: BSD-3-Clause + * + * Copyright (c) 1990 The Regents of the University of California. + * All rights reserved. + * + * This code is derived from software contributed to Berkeley by + * William Jolitz. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#ifdef __i386__ +#include <i386/asm.h> +#else /* !__i386__ */ + +#ifndef _MACHINE_ASM_H_ +#define _MACHINE_ASM_H_ + +#include <sys/cdefs.h> + +#ifdef PIC +#define PIC_PLT(x) x@PLT +#define PIC_GOT(x) x@GOTPCREL(%rip) +#else +#define PIC_PLT(x) x +#endif + +/* + * CNAME and HIDENAME manage the relationship between symbol names in C + * and the equivalent assembly language names. CNAME is given a name as + * it would be used in a C program. It expands to the equivalent assembly + * language name. HIDENAME is given an assembly-language name, and expands + * to a possibly-modified form that will be invisible to C programs. + */ +#define CNAME(csym) csym +#define HIDENAME(asmsym) .asmsym + +#define _START_ENTRY .text; .p2align 4,0x90 + +#define _ENTRY(x) _START_ENTRY; \ + .globl CNAME(x); .type CNAME(x),@function; CNAME(x):; \ + .cfi_startproc + +#ifdef PROF +#define ALTENTRY(x) _ENTRY(x); \ + pushq %rbp; \ + .cfi_def_cfa_offset 16; \ + .cfi_offset %rbp, -16; \ + movq %rsp,%rbp; \ + call PIC_PLT(HIDENAME(mcount)); \ + popq %rbp; \ + .cfi_restore %rbp; \ + .cfi_def_cfa_offset 8; \ + jmp 9f +#define ENTRY(x) _ENTRY(x); \ + pushq %rbp; \ + .cfi_def_cfa_offset 16; \ + .cfi_offset %rbp, -16; \ + movq %rsp,%rbp; \ + call PIC_PLT(HIDENAME(mcount)); \ + popq %rbp; \ + .cfi_restore %rbp; \ + .cfi_def_cfa_offset 8; \ + 9: +#else +#define ALTENTRY(x) _ENTRY(x) +#define ENTRY(x) _ENTRY(x) +#endif + +#define END(x) .size x, . - x; .cfi_endproc +/* + * WEAK_REFERENCE(): create a weak reference alias from sym. + * The macro is not a general asm macro that takes arbitrary names, + * but one that takes only C names. It does the non-null name + * translation inside the macro. + */ +#define WEAK_REFERENCE(sym, alias) \ + .weak CNAME(alias); \ + .equ CNAME(alias),CNAME(sym) + +#define RCSID(x) .text; .asciz x + +#undef __FBSDID +#if !defined(STRIP_FBSDID) +#define __FBSDID(s) .ident s +#else +#define __FBSDID(s) /* nothing */ +#endif /* !STRIP_FBSDID */ + +#endif /* !_MACHINE_ASM_H_ */ + +#endif /* __i386__ */ |