/* $NetBSD: profile.h,v 1.4 2021/02/10 12:31:34 ryo 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. */ #ifdef __aarch64__ #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" /* gcc */ #define MCOUNT_ASM_NAME_ALIAS "__mcount" /* llvm */ #define PLTSYM #define MCOUNT \ __asm(".text"); \ __asm(".align 6"); \ __asm(".type " MCOUNT_ASM_NAME ",@function"); \ __asm(".global " MCOUNT_ASM_NAME); \ __asm(".global " MCOUNT_ASM_NAME_ALIAS); \ __asm(MCOUNT_ASM_NAME ":"); \ __asm(MCOUNT_ASM_NAME_ALIAS ":"); \ /* \ * Preserve registers that are trashed during mcount \ */ \ __asm("stp x29, x30, [sp, #-80]!"); \ __asm("stp x0, x1, [sp, #16]"); \ __asm("stp x2, x3, [sp, #32]"); \ __asm("stp x4, x5, [sp, #48]"); \ __asm("stp x6, x7, [sp, #64]"); \ /* \ * find the return address for mcount, \ * and the return address for mcount's caller. \ * \ * frompcindex = pc pushed by call into self. \ */ \ __asm("ldr x0, [x29, #8]"); \ /* \ * 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, [sp, #16]"); \ __asm("ldp x2, x3, [sp, #32]"); \ __asm("ldp x4, x5, [sp, #48]"); \ __asm("ldp x6, x7, [sp, #64]"); \ __asm("ldp x29, x30, [sp], #80"); \ __asm("ret"); \ __asm(".size " MCOUNT_ASM_NAME ", .-" MCOUNT_ASM_NAME); #ifdef _KERNEL #define MCOUNT_ENTER \ __asm __volatile ("mrs %x0, daif; msr daifset, #3": "=r"(s):: "memory") #define MCOUNT_EXIT \ __asm __volatile ("msr daif, %x0":: "r"(s): "memory") #endif /* _KERNEL */ #elif defined(__arm__) #include <arm/profile.h> #endif
