1997-03-21 20:00:48 +00:00
|
|
|
/* i386-specific implemetation of profiling support.
|
2014-01-01 11:03:15 +00:00
|
|
|
Copyright (C) 1997-2014 Free Software Foundation, Inc.
|
1997-03-21 20:00:48 +00:00
|
|
|
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
|
2001-07-06 04:58:11 +00:00
|
|
|
modify it under the terms of the GNU Lesser General Public
|
|
|
|
|
License as published by the Free Software Foundation; either
|
|
|
|
|
version 2.1 of the License, or (at your option) any later version.
|
1997-03-21 20:00:48 +00:00
|
|
|
|
|
|
|
|
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
|
2001-07-06 04:58:11 +00:00
|
|
|
Lesser General Public License for more details.
|
1997-03-21 20:00:48 +00:00
|
|
|
|
2001-07-06 04:58:11 +00:00
|
|
|
You should have received a copy of the GNU Lesser General Public
|
2012-02-09 23:18:22 +00:00
|
|
|
License along with the GNU C Library; if not, see
|
|
|
|
|
<http://www.gnu.org/licenses/>. */
|
1997-03-21 20:00:48 +00:00
|
|
|
|
|
|
|
|
#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. */
|
|
|
|
|
|
2012-07-10 12:30:24 +00:00
|
|
|
.globl C_SYMBOL_NAME(_mcount)
|
2012-08-02 19:04:29 +00:00
|
|
|
.type C_SYMBOL_NAME(_mcount), @function
|
1997-03-21 20:00:48 +00:00
|
|
|
.align ALIGNARG(4)
|
|
|
|
|
C_LABEL(_mcount)
|
|
|
|
|
/* Save the caller-clobbered registers. */
|
|
|
|
|
pushl %eax
|
|
|
|
|
pushl %ecx
|
|
|
|
|
pushl %edx
|
|
|
|
|
|
2002-03-15 09:30:44 +00:00
|
|
|
movl 12(%esp), %edx
|
|
|
|
|
movl 4(%ebp), %eax
|
1997-03-21 20:00:48 +00:00
|
|
|
|
2002-03-15 09:30:44 +00:00
|
|
|
/* No need to access the PLT or GOT, __mcount_internal is an
|
|
|
|
|
internal function and we can make a relative call. */
|
1997-03-21 20:00:48 +00:00
|
|
|
call C_SYMBOL_NAME(__mcount_internal)
|
|
|
|
|
|
|
|
|
|
/* 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
|
2005-05-26 14:30:51 +00:00
|
|
|
weak_alias (_mcount, mcount)
|
2010-08-08 04:24:05 +00:00
|
|
|
|
|
|
|
|
/* Same as above, but doesn't require a frame pointer */
|
2012-07-10 12:30:24 +00:00
|
|
|
.globl C_SYMBOL_NAME(__fentry__)
|
2012-08-02 19:04:29 +00:00
|
|
|
.type C_SYMBOL_NAME(__fentry__), @function
|
2010-08-08 04:24:05 +00:00
|
|
|
.align ALIGNARG(4)
|
|
|
|
|
C_LABEL(__fentry__)
|
|
|
|
|
/* Save the caller-clobbered registers. */
|
|
|
|
|
pushl %eax
|
|
|
|
|
pushl %ecx
|
|
|
|
|
pushl %edx
|
|
|
|
|
|
|
|
|
|
movl 12(%esp), %edx
|
|
|
|
|
movl 16(%esp), %eax
|
|
|
|
|
|
|
|
|
|
/* No need to access the PLT or GOT, __mcount_internal is an
|
|
|
|
|
internal function and we can make a relative call. */
|
|
|
|
|
call C_SYMBOL_NAME(__mcount_internal)
|
|
|
|
|
|
|
|
|
|
/* Pop the saved registers. Please note that `__fentry__' has no
|
|
|
|
|
return value. */
|
|
|
|
|
popl %edx
|
|
|
|
|
popl %ecx
|
|
|
|
|
popl %eax
|
|
|
|
|
ret
|
|
|
|
|
ASM_SIZE_DIRECTIVE(C_SYMBOL_NAME(__fentry__))
|
