/* $NetBSD: profile.h,v 1.1 2014/09/03 19:34:26 matt Exp $ */ /*- * Copyright (c) 2014 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Matt Thomas of 3am Software Foundry. * * 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. * * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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 _OR1K_PROFILE_H_ #define _OR1K_PROFILE_H_ #define _MCOUNT_DECL void _mcount /* * Cannot implement mcount in C as GCC will trash the ip register when it * pushes a trapframe. Pity we cannot insert assembly before the function * prologue. */ #define MCOUNT_ASM_NAME "__mcount" #define PLTSYM #if 0 #define MCOUNT \ __asm(".text"); \ __asm(".align 0"); \ __asm(".type " MCOUNT_ASM_NAME ",@function"); \ __asm(".global " MCOUNT_ASM_NAME); \ __asm(MCOUNT_ASM_NAME ":"); \ /* \ * Preserve registers that are trashed during mcount \ */ \ __asm("sub sp, sp, #80"); \ __asm("stp x29, x30, [sp, #64]"); \ __asm("add x29, sp, #64"); \ __asm("stp x0, x1, [x29, #0]"); \ __asm("stp x2, x3, [x29, #16]"); \ __asm("stp x4, x5, [x29, #32]"); \ __asm("stp x6, x7, [x29, #48]"); \ /* \ * find the return address for mcount, \ * and the return address for mcount's caller. \ * \ * frompcindex = pc pushed by call into self. \ */ \ __asm("mov x0, x19"); \ /* \ * selfpc = pc pushed by mcount call \ */ \ __asm("mov x1, x30"); \ /* \ * Call the real mcount code \ */ \ __asm("bl " ___STRING(_C_LABEL(_mcount))); \ /* \ * Restore registers that were trashed during mcount \ */ \ __asm("ldp x0, x1, [x29, #0]"); \ __asm("ldp x2, x3, [x29, #16]"); \ __asm("ldp x4, x5, [x29, #32]"); \ __asm("ldp x6, x7, [x29, #48]"); \ __asm("ldp x29, x30, [x29, #64]"); \ __asm("add sp, sp, #80"); \ __asm("ret"); \ __asm(".size " MCOUNT_ASM_NAME ", .-" MCOUNT_ASM_NAME); #endif #endif /* _OR1K_PROFILE_H_ */ |