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43 lines
1.7 KiB
C
43 lines
1.7 KiB
C
/* i386-specific implementation of profiling support.
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Copyright (C) 1997-2020 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include <sysdep.h>
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/* We need a special version of the `mcount' function since for ix86 it
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must not clobber any register. This has several reasons:
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- there is a bug in gcc as of version 2.7.2.2 which prohibits the
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use of profiling together with nested functions
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- the ELF `fixup' function uses GCC's regparm feature
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- some (future) systems might want to pass parameters in registers. */
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/* We must not pollute the global namespace. */
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#define mcount_internal __mcount_internal
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extern void mcount_internal (u_long frompc, u_long selfpc)
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__attribute__ ((regparm (2))) attribute_hidden;
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#define _MCOUNT_DECL(frompc, selfpc) \
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__attribute__ ((regparm (2))) \
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void mcount_internal (u_long frompc, u_long selfpc)
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/* Define MCOUNT as empty since we have the implementation in another
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file. */
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#define MCOUNT
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