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-rw-r--r--sysdeps/i386/i386-mcount.S65
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diff --git a/sysdeps/i386/i386-mcount.S b/sysdeps/i386/i386-mcount.S
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+/* i386-specific implemetation of profiling support.
+ Copyright (C) 1997 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Library General Public License as
+ published by the Free Software Foundation; either version 2 of the
+ License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Library General Public License for more details.
+
+ You should have received a copy of the GNU Library General Public
+ License along with the GNU C Library; see the file COPYING.LIB. If not,
+ write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA. */
+
+#include <sysdep.h>
+
+/* We need a special version of the `mcount' function since for ix86 it
+ must not clobber any register. This has several reasons:
+ - there is a bug in gcc as of version 2.7.2.2 which prohibits the
+ use of profiling together with nested functions
+ - the ELF `fixup' function uses GCC's regparm feature
+ - some (future) systems might want to pass parameters in registers. */
+
+ ASM_GLOBAL_DIRECTIVE C_SYMBOL_NAME(_mcount)
+ ASM_TYPE_DIRECTIVE(C_SYMBOL_NAME(_mcount), @function)
+ .align ALIGNARG(4)
+C_LABEL(_mcount)
+ /* Save the caller-clobbered registers. */
+ pushl %eax
+ pushl %ecx
+ pushl %edx
+
+ movl 12(%esp), %eax
+ movl 4(%ebp), %ecx
+ pushl %eax
+ pushl %ecx
+
+#ifdef PIC
+ call 1f
+1: popl %ecx
+ addl $_GLOBAL_OFFSET_TABLE_+[.-1b], %ecx
+ movl C_SYMBOL_NAME(__mcount_internal@GOTOFF)(%ecx), %eax
+ call *%eax
+#else
+ call C_SYMBOL_NAME(__mcount_internal)
+#endif
+ popl %ecx
+ popl %eax /* Pop the parameters. */
+
+ /* Pop the saved registers. Please note that `mcount' has no
+ return value. */
+ popl %edx
+ popl %ecx
+ popl %eax
+ ret
+ ASM_SIZE_DIRECTIVE(C_SYMBOL_NAME(_mcount))
+
+#undef mcount
+weak_alias(_mcount, mcount)