1 /* $OpenBSD: md_init.h,v 1.2 2004/09/09 17:45:26 pefo Exp $ */ 2 3 /*- 4 * Copyright (c) 2001 Ross Harvey 5 * Copyright (c) 2001 Simon Burge 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the NetBSD 19 * Foundation, Inc. and its contributors. 20 * 4. Neither the name of The NetBSD Foundation nor the names of its 21 * contributors may be used to endorse or promote products derived 22 * from this software without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 25 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 26 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 27 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 28 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 29 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 30 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 31 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 32 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 33 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 34 * POSSIBILITY OF SUCH DAMAGE. 35 */ 36 37 #define ra "$31" 38 39 /* 40 * Allocate 32 bytes for the stack frame. Store GP at SP+16 (since 41 * this is where code generated by the compiler for fallthru processing 42 * expects it to be), and the RA at SP+24. 43 */ 44 45 /* this is gross... */ 46 47 #ifdef __ABICALLS__ 48 #define MD_FUNCTION_PROLOGUE(entry_pt) \ 49 " .frame $sp,32,$31 \n" \ 50 " .set reorder \n" \ 51 " dsubu $sp,$sp,32 \n" \ 52 " .cpsetup $25, 16, "#entry_pt" \n" \ 53 " sd "ra",24($sp) \n" 54 #else 55 #define MD_FUNCTION_PROLOGUE(entry_pt) \ 56 " dsubu $sp,$sp,32 \n" \ 57 " sd "ra",24($sp) \n" 58 #endif 59 60 61 #define MD_SECTION_PROLOGUE(sect, entry_pt) \ 62 __asm ( \ 63 ".section "#sect",\"ax\",@progbits \n" \ 64 ".align 2 \n" \ 65 ".globl "#entry_pt" \n" \ 66 ".type "#entry_pt"@function \n" \ 67 ".ent "#entry_pt" \n" \ 68 #entry_pt": \n" \ 69 MD_FUNCTION_PROLOGUE(entry_pt) \ 70 " /* fall thru */ \n" \ 71 ".previous") 72 73 #define MD_SECTION_EPILOGUE(sect) \ 74 __asm ( \ 75 ".section "#sect",\"ax\",@progbits \n" \ 76 " ld "ra",24($sp) \n" \ 77 " # next should have been a .cpreturn \n" \ 78 " ld $gp,16($sp) \n" \ 79 " .set noreorder \n" \ 80 " j "ra" \n" \ 81 " daddu $sp,$sp,32 \n" \ 82 " .set reorder \n" \ 83 ".previous") 84 85 #define MD_SECT_CALL_FUNC(section, func) \ 86 __asm (".section "#section", \"ax\" \n" \ 87 " jal " #func " \n" \ 88 ".previous") 89 90