1*27620987Smatt /* $NetBSD: profile.h,v 1.1 2014/09/03 19:34:26 matt Exp $ */ 2*27620987Smatt 3*27620987Smatt /*- 4*27620987Smatt * Copyright (c) 2014 The NetBSD Foundation, Inc. 5*27620987Smatt * All rights reserved. 6*27620987Smatt * 7*27620987Smatt * This code is derived from software contributed to The NetBSD Foundation 8*27620987Smatt * by Matt Thomas of 3am Software Foundry. 9*27620987Smatt * 10*27620987Smatt * Redistribution and use in source and binary forms, with or without 11*27620987Smatt * modification, are permitted provided that the following conditions 12*27620987Smatt * are met: 13*27620987Smatt * 1. Redistributions of source code must retain the above copyright 14*27620987Smatt * notice, this list of conditions and the following disclaimer. 15*27620987Smatt * 2. Redistributions in binary form must reproduce the above copyright 16*27620987Smatt * notice, this list of conditions and the following disclaimer in the 17*27620987Smatt * documentation and/or other materials provided with the distribution. 18*27620987Smatt * 19*27620987Smatt * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20*27620987Smatt * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21*27620987Smatt * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22*27620987Smatt * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23*27620987Smatt * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24*27620987Smatt * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25*27620987Smatt * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26*27620987Smatt * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27*27620987Smatt * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28*27620987Smatt * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29*27620987Smatt * POSSIBILITY OF SUCH DAMAGE. 30*27620987Smatt */ 31*27620987Smatt 32*27620987Smatt #ifndef _OR1K_PROFILE_H_ 33*27620987Smatt #define _OR1K_PROFILE_H_ 34*27620987Smatt 35*27620987Smatt #define _MCOUNT_DECL void _mcount 36*27620987Smatt 37*27620987Smatt /* 38*27620987Smatt * Cannot implement mcount in C as GCC will trash the ip register when it 39*27620987Smatt * pushes a trapframe. Pity we cannot insert assembly before the function 40*27620987Smatt * prologue. 41*27620987Smatt */ 42*27620987Smatt 43*27620987Smatt #define MCOUNT_ASM_NAME "__mcount" 44*27620987Smatt #define PLTSYM 45*27620987Smatt 46*27620987Smatt #if 0 47*27620987Smatt #define MCOUNT \ 48*27620987Smatt __asm(".text"); \ 49*27620987Smatt __asm(".align 0"); \ 50*27620987Smatt __asm(".type " MCOUNT_ASM_NAME ",@function"); \ 51*27620987Smatt __asm(".global " MCOUNT_ASM_NAME); \ 52*27620987Smatt __asm(MCOUNT_ASM_NAME ":"); \ 53*27620987Smatt /* \ 54*27620987Smatt * Preserve registers that are trashed during mcount \ 55*27620987Smatt */ \ 56*27620987Smatt __asm("sub sp, sp, #80"); \ 57*27620987Smatt __asm("stp x29, x30, [sp, #64]"); \ 58*27620987Smatt __asm("add x29, sp, #64"); \ 59*27620987Smatt __asm("stp x0, x1, [x29, #0]"); \ 60*27620987Smatt __asm("stp x2, x3, [x29, #16]"); \ 61*27620987Smatt __asm("stp x4, x5, [x29, #32]"); \ 62*27620987Smatt __asm("stp x6, x7, [x29, #48]"); \ 63*27620987Smatt /* \ 64*27620987Smatt * find the return address for mcount, \ 65*27620987Smatt * and the return address for mcount's caller. \ 66*27620987Smatt * \ 67*27620987Smatt * frompcindex = pc pushed by call into self. \ 68*27620987Smatt */ \ 69*27620987Smatt __asm("mov x0, x19"); \ 70*27620987Smatt /* \ 71*27620987Smatt * selfpc = pc pushed by mcount call \ 72*27620987Smatt */ \ 73*27620987Smatt __asm("mov x1, x30"); \ 74*27620987Smatt /* \ 75*27620987Smatt * Call the real mcount code \ 76*27620987Smatt */ \ 77*27620987Smatt __asm("bl " ___STRING(_C_LABEL(_mcount))); \ 78*27620987Smatt /* \ 79*27620987Smatt * Restore registers that were trashed during mcount \ 80*27620987Smatt */ \ 81*27620987Smatt __asm("ldp x0, x1, [x29, #0]"); \ 82*27620987Smatt __asm("ldp x2, x3, [x29, #16]"); \ 83*27620987Smatt __asm("ldp x4, x5, [x29, #32]"); \ 84*27620987Smatt __asm("ldp x6, x7, [x29, #48]"); \ 85*27620987Smatt __asm("ldp x29, x30, [x29, #64]"); \ 86*27620987Smatt __asm("add sp, sp, #80"); \ 87*27620987Smatt __asm("ret"); \ 88*27620987Smatt __asm(".size " MCOUNT_ASM_NAME ", .-" MCOUNT_ASM_NAME); 89*27620987Smatt #endif 90*27620987Smatt 91*27620987Smatt #endif /* _OR1K_PROFILE_H_ */ 92