| /* $NetBSD: asm.h,v 1.14 2002/07/20 08:37:30 mrg 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. All advertising materials mentioning features or use of this software |
| * must display the following acknowledgement: |
| * This product includes software developed by the University of |
| * California, Berkeley and its contributors. |
| * 4. 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 _ASM_H_ |
| #define _ASM_H_ |
| |
| /* Pull in CCFSZ, CC64FSZ, and BIAS from frame.h */ |
| #ifndef _LOCORE |
| #define _LOCORE |
| #endif |
| #include <machine/frame.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 |
| |
| #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. |
| * |
| * We can use two code sequences. We can read the %pc or use the call |
| * instruction that saves the pc in %o7. Call requires the branch unit and |
| * IEU1, and clobbers %o7 which needs to be restored. This instruction |
| * sequence takes about 4 cycles due to instruction interdependence. Reading |
| * the pc takes 4 cycles to dispatch and is always dispatched alone. That |
| * sequence takes 7 cycles. |
| */ |
| #ifdef __arch64__ |
| #define PIC_PROLOGUE(dest,tmp) \ |
| mov %o7, tmp; \ |
| sethi %hi(_GLOBAL_OFFSET_TABLE_-4),dest; \ |
| call 0f; \ |
| or dest,%lo(_GLOBAL_OFFSET_TABLE_+4),dest; \ |
| 0: \ |
| add dest,%o7,dest; \ |
| mov tmp, %o7 |
| #else |
| #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 |
| #endif |
| |
| /* |
| * 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. |
| */ |
| #ifdef __arch64__ |
| #define PICCY_SET(var,dest,tmp) \ |
| 3: rd %pc, tmp; add tmp,(var-3b),dest |
| #else |
| #define PICCY_SET(var,dest,tmp) \ |
| mov %o7,tmp; 3: call 4f; nop; 4: \ |
| add %o7,(var-3b),dest; mov tmp,%o7 |
| #endif |
| #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 |
| /* see _MCOUNT_ENTRY in profile.h */ |
| #ifdef __ELF__ |
| #ifdef __arch64__ |
| #define _PROF_PROLOGUE \ |
| .data; .align 8; 1: .uaword 0; .uaword 0; \ |
| .text; save %sp,-CC64FSZ,%sp; sethi %hi(1b),%o0; call _mcount; \ |
| or %o0,%lo(1b),%o0; restore |
| #else |
| #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 |
| #endif |
| #else |
| #ifdef __arch64__ |
| #define _PROF_PROLOGUE \ |
| .data; .align 8; 1: .uaword 0; .uaword 0; \ |
| .text; save %sp,-CC64FSZ,%sp; sethi %hi(1b),%o0; call mcount; \ |
| or %o0,%lo(1b),%o0; restore |
| #else |
| #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 |
| #endif |
| #endif |
| #else |
| #define _PROF_PROLOGUE |
| #endif |
| |
| #define ENTRY(name) _ENTRY(_C_LABEL(name)); _PROF_PROLOGUE |
| #define ENTRY_NOPROFILE(name) _ENTRY(_C_LABEL(name)) |
| #define ASENTRY(name) _ENTRY(_ASM_LABEL(name)); _PROF_PROLOGUE |
| #define FUNC(name) ASENTRY(name) |
| #define RODATA(name) .align 4; .text; .globl _C_LABEL(name); \ |
| OTYPE(_C_LABEL(name)); _C_LABEL(name): |
| |
| #define ASMSTR .asciz |
| |
| #define RCSID(name) .asciz name |
| |
| #ifdef __ELF__ |
| #define WEAK_ALIAS(alias,sym) \ |
| .weak alias; \ |
| alias = sym |
| #endif |
| |
| /* |
| * WARN_REFERENCES: create a warning if the specified symbol is referenced. |
| */ |
| #ifdef __ELF__ |
| #ifdef __STDC__ |
| #define WARN_REFERENCES(_sym,_msg) \ |
| .section .gnu.warning. ## _sym ; .ascii _msg ; .text |
| #else |
| #define WARN_REFERENCES(_sym,_msg) \ |
| .section .gnu.warning./**/_sym ; .ascii _msg ; .text |
| #endif /* __STDC__ */ |
| #else |
| #ifdef __STDC__ |
| #define __STRING(x) #x |
| #define WARN_REFERENCES(sym,msg) \ |
| .stabs msg ## ,30,0,0,0 ; \ |
| .stabs __STRING(_ ## sym) ## ,1,0,0,0 |
| #else |
| #define __STRING(x) "x" |
| #define WARN_REFERENCES(sym,msg) \ |
| .stabs msg,30,0,0,0 ; \ |
| .stabs __STRING(_/**/sym),1,0,0,0 |
| #endif /* __STDC__ */ |
| #endif /* __ELF__ */ |
| |
| #endif /* _ASM_H_ */ |