1997-03-21 21:00:48 +01:00
|
|
|
/* 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
|
1997-05-27 01:01:17 +02:00
|
|
|
movl C_SYMBOL_NAME(__mcount_internal@GOT)(%ecx), %eax
|
1997-03-21 21:00:48 +01:00
|
|
|
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)
|
