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553cb3ed46
sys/param.h was manually adjusted to not define __NetBSD_Version__ since it will be defined by the compiler.
99 lines
3.4 KiB
C
Vendored
99 lines
3.4 KiB
C
Vendored
/* $NetBSD: profile.h,v 1.4 2021/02/10 12:31:34 ryo Exp $ */
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/*-
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* Copyright (c) 2014 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Matt Thomas of 3am Software Foundry.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifdef __aarch64__
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#define _MCOUNT_DECL void mcount
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/*
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* Cannot implement mcount in C as GCC will trash the ip register when it
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* pushes a trapframe. Pity we cannot insert assembly before the function
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* prologue.
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*/
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#define MCOUNT_ASM_NAME "_mcount" /* gcc */
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#define MCOUNT_ASM_NAME_ALIAS "__mcount" /* llvm */
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#define PLTSYM
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#define MCOUNT \
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__asm(".text"); \
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__asm(".align 6"); \
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__asm(".type " MCOUNT_ASM_NAME ",@function"); \
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__asm(".global " MCOUNT_ASM_NAME); \
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__asm(".global " MCOUNT_ASM_NAME_ALIAS); \
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__asm(MCOUNT_ASM_NAME ":"); \
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__asm(MCOUNT_ASM_NAME_ALIAS ":"); \
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/* \
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* Preserve registers that are trashed during mcount \
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*/ \
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__asm("stp x29, x30, [sp, #-80]!"); \
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__asm("stp x0, x1, [sp, #16]"); \
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__asm("stp x2, x3, [sp, #32]"); \
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__asm("stp x4, x5, [sp, #48]"); \
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__asm("stp x6, x7, [sp, #64]"); \
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/* \
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* find the return address for mcount, \
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* and the return address for mcount's caller. \
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* \
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* frompcindex = pc pushed by call into self. \
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*/ \
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__asm("ldr x0, [x29, #8]"); \
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/* \
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* selfpc = pc pushed by mcount call \
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*/ \
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__asm("mov x1, x30"); \
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/* \
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* Call the real mcount code \
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*/ \
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__asm("bl " ___STRING(_C_LABEL(mcount))); \
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/* \
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* Restore registers that were trashed during mcount \
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*/ \
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__asm("ldp x0, x1, [sp, #16]"); \
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__asm("ldp x2, x3, [sp, #32]"); \
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__asm("ldp x4, x5, [sp, #48]"); \
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__asm("ldp x6, x7, [sp, #64]"); \
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__asm("ldp x29, x30, [sp], #80"); \
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__asm("ret"); \
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__asm(".size " MCOUNT_ASM_NAME ", .-" MCOUNT_ASM_NAME);
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#ifdef _KERNEL
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#define MCOUNT_ENTER \
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__asm __volatile ("mrs %x0, daif; msr daifset, #3": "=r"(s):: "memory")
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#define MCOUNT_EXIT \
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__asm __volatile ("msr daif, %x0":: "r"(s): "memory")
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#endif /* _KERNEL */
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#elif defined(__arm__)
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#include <arm/profile.h>
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#endif |