1 /* $NetBSD: profile.h,v 1.1 2014/09/03 19:34:26 matt Exp $ */ 2 3 /*- 4 * Copyright (c) 2014 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Matt Thomas of 3am Software Foundry. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #ifndef _OR1K_PROFILE_H_ 33 #define _OR1K_PROFILE_H_ 34 35 #define _MCOUNT_DECL void _mcount 36 37 /* 38 * Cannot implement mcount in C as GCC will trash the ip register when it 39 * pushes a trapframe. Pity we cannot insert assembly before the function 40 * prologue. 41 */ 42 43 #define MCOUNT_ASM_NAME "__mcount" 44 #define PLTSYM 45 46 #if 0 47 #define MCOUNT \ 48 __asm(".text"); \ 49 __asm(".align 0"); \ 50 __asm(".type " MCOUNT_ASM_NAME ",@function"); \ 51 __asm(".global " MCOUNT_ASM_NAME); \ 52 __asm(MCOUNT_ASM_NAME ":"); \ 53 /* \ 54 * Preserve registers that are trashed during mcount \ 55 */ \ 56 __asm("sub sp, sp, #80"); \ 57 __asm("stp x29, x30, [sp, #64]"); \ 58 __asm("add x29, sp, #64"); \ 59 __asm("stp x0, x1, [x29, #0]"); \ 60 __asm("stp x2, x3, [x29, #16]"); \ 61 __asm("stp x4, x5, [x29, #32]"); \ 62 __asm("stp x6, x7, [x29, #48]"); \ 63 /* \ 64 * find the return address for mcount, \ 65 * and the return address for mcount's caller. \ 66 * \ 67 * frompcindex = pc pushed by call into self. \ 68 */ \ 69 __asm("mov x0, x19"); \ 70 /* \ 71 * selfpc = pc pushed by mcount call \ 72 */ \ 73 __asm("mov x1, x30"); \ 74 /* \ 75 * Call the real mcount code \ 76 */ \ 77 __asm("bl " ___STRING(_C_LABEL(_mcount))); \ 78 /* \ 79 * Restore registers that were trashed during mcount \ 80 */ \ 81 __asm("ldp x0, x1, [x29, #0]"); \ 82 __asm("ldp x2, x3, [x29, #16]"); \ 83 __asm("ldp x4, x5, [x29, #32]"); \ 84 __asm("ldp x6, x7, [x29, #48]"); \ 85 __asm("ldp x29, x30, [x29, #64]"); \ 86 __asm("add sp, sp, #80"); \ 87 __asm("ret"); \ 88 __asm(".size " MCOUNT_ASM_NAME ", .-" MCOUNT_ASM_NAME); 89 #endif 90 91 #endif /* _OR1K_PROFILE_H_ */ 92