/* $OpenBSD: asm.h,v 1.8 2015/08/30 10:19:49 guenther Exp $ */ /* $NetBSD: asm.h,v 1.5 1997/07/16 15:16:43 christos Exp $ */ /* * Copyright (c) 1994 Allen Briggs * All rights reserved. * * Gleaned from locore.s and sun3 asm.h which had the following copyrights: * locore.s: * Copyright (c) 1988 University of Utah. * Copyright (c) 1982, 1990 The Regents of the University of California. * sun3/include/asm.h: * Copyright (c) 1993 Adam Glass * Copyright (c) 1990 The Regents of the University of California. * * 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. */ #ifndef _MACHINE_ASM_H_ #define _MACHINE_ASM_H_ #ifdef __ELF__ #define _C_LABEL(name) name #else #ifdef __STDC__ #define _C_LABEL(name) _ ## name #else #define _C_LABEL(name) _/**/name #endif #endif #define _ASM_LABEL(name) name /* * STRONG_ALIAS, WEAK_ALIAS * Create a strong or weak alias. */ #ifdef __ELF__ #define STRONG_ALIAS(alias,sym) \ .global alias; \ alias = sym #define WEAK_ALIAS(alias,sym) \ .weak alias; \ alias = sym #endif /* * WARN_REFERENCES: create a warning if the specified symbol is referenced * (ELF only). */ #ifdef __ELF__ #define WARN_REFERENCES(_sym,_msg) \ .section .gnu.warning. ## _sym ; .ascii _msg ; .text #endif /* __ELF__ */ #ifdef __PIC__ /* * PIC_PROLOGUE() is akin to the compiler generated function prologue for * PIC code. It leaves the address of the Global Offset Table in DEST, * clobbering register TMP in the process. Using the temporary enables us * to work without a stack frame (doing so requires saving %o7) . */ #define PIC_PROLOGUE(dest,tmp) \ mov %o7,tmp; 3: call 4f; nop; 4: \ sethi %hi(_C_LABEL(_GLOBAL_OFFSET_TABLE_)-(3b-.)),dest; \ or dest,%lo(_C_LABEL(_GLOBAL_OFFSET_TABLE_)-(3b-.)),dest; \ add dest,%o7,dest; mov tmp,%o7 /* * PICCY_SET() does the equivalent of a `set var, %dest' instruction in * a PIC-like way, but without involving the Global Offset Table. This * only works for VARs defined in the same file *and* in the text segment. */ #define PICCY_SET(var,dest,tmp) \ mov %o7,tmp; 3: call 4f; nop; 4: \ add %o7,(var-3b),dest; mov tmp,%o7 #else #define PIC_PROLOGUE(dest,tmp) #define PICCY_OFFSET(var,dest,tmp) #endif #define FTYPE(x) .type x,@function #define OTYPE(x) .type x,@object #define _ENTRY(name) \ .align 4; .globl name; .proc 1; FTYPE(name); name: #ifdef GPROF #define _PROF_PROLOGUE \ .data; .align 4; 1: .long 0; \ .text; save %sp,-96,%sp; sethi %hi(1b),%o0; call mcount; \ or %o0,%lo(1b),%o0; restore #else #define _PROF_PROLOGUE #endif #define ENTRY(name) _ENTRY(_C_LABEL(name)); _PROF_PROLOGUE #define ASENTRY(name) _ENTRY(_ASM_LABEL(name)); _PROF_PROLOGUE #define FUNC(name) ASENTRY(name) #define END(y) .size y, . - y #define ASMSTR .asciz #define RCSID(name) .asciz name #endif /* _MACHINE_ASM_H_ */