/* Startup code for programs linked with GNU libc. Copyright (C) 1998,1999,2000,2001,2002,2003 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or 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. 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 Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with the GNU C Library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. */ #include #include "bp-sym.h" /* These are the various addresses we require. */ #ifdef PIC .section ".data" #else .section ".rodata" #endif .align 2 L(start_addresses): .long _SDA_BASE_ .long BP_SYM (main) .long __libc_csu_init .long __libc_csu_fini ASM_SIZE_DIRECTIVE(L(start_addresses)) .section ".text" #ifdef PIC L(start_addressesp): .long L(start_addresses)-L(branch) #endif ENTRY(_start) /* Save the stack pointer, in case we're statically linked under Linux. */ mr r9,r1 /* Set up an initial stack frame, and clear the LR. */ clrrwi r1,r1,4 #ifdef PIC bcl 20,31,L(branch) L(branch): li r0,0 mflr r13 #else li r0,0 #endif stwu r1,-16(r1) mtlr r0 stw r0,0(r1) /* Set r13 to point at the 'small data area', and put the address of start_addresses in r8... */ #ifdef PIC lwz r8,L(start_addressesp)-L(branch)(r13) add r8,r13,r8 lwz r13,0(r8) #else lis r8,L(start_addresses)@ha lwzu r13,L(start_addresses)@l(r8) #endif /* and continue in libc-start, in glibc. */ b JUMPTARGET(BP_SYM (__libc_start_main)) END(_start) /* Define a symbol for the first piece of initialized data. */ .section ".data" .globl __data_start __data_start: weak_alias (__data_start, data_start)