/* 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 , 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 /* 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)