ebc6dbad07
used for argument passing, plus %rax (used to pass the number of float arguments to varargs functions), to avoid having it clobber caller-saved registers. mcount is emitted "under the radar", so the compiler doesn't know it should do this. Change the kernel mcount entry/exit macros to use plain cli/sti, like on i386.
79 lines
2.7 KiB
C
79 lines
2.7 KiB
C
/* $NetBSD: profile.h,v 1.3 2003/11/28 23:22:45 fvdl Exp $ */
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/*
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* Copyright (c) 1992, 1993
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* The Regents of the University of California. All rights reserved.
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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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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)profile.h 8.1 (Berkeley) 6/11/93
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*/
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#define _MCOUNT_DECL void _mcount
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#define EPROL_EXPORT __asm(".globl _eprol")
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#ifdef PIC
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#define __MCPLT "@PLT"
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#else
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#define __MCPLT
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#endif
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#define MCOUNT \
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__weak_alias(mcount, __mcount) \
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__asm(" .globl __mcount \n" \
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" .type __mcount,@function\n" \
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"__mcount: \n" \
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" pushq %rbp \n" \
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" movq %rsp,%rbp \n" \
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" subq $56,%rsp \n" \
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" movq %rdi,0(%rsp) \n" \
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" movq %rsi,8(%rsp) \n" \
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" movq %rdx,16(%rsp) \n" \
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" movq %rcx,24(%rsp) \n" \
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" movq %r8,32(%rsp) \n" \
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" movq %r9,40(%rsp) \n" \
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" movq %rax,48(%rsp) \n" \
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" movq 0(%rbp),%r11 \n" \
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" movq 8(%r11),%rdi \n" \
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" movq 8(%rbp),%rsi \n" \
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" call _mcount \n" \
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" movq 0(%rsp),%rdi \n" \
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" movq 8(%rsp),%rsi \n" \
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" movq 16(%rsp),%rdx \n" \
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" movq 24(%rsp),%rcx \n" \
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" movq 32(%rsp),%r8 \n" \
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" movq 40(%rsp),%r9 \n" \
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" movq 48(%rsp),%rax \n" \
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" leave \n" \
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" ret \n" \
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" .size __mcount,.-__mcount");
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#ifdef _KERNEL
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#define MCOUNT_ENTER (void)&s; __asm__("cli");
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#define MCOUNT_EXIT __asm__("sti");
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#endif /* _KERNEL */
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