| /* Startup code for programs linked with GNU libc. |
| Copyright (C) 1998,1999,2000,2001,2002,2003,2009 |
| 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. |
| |
| In addition to the permissions in the GNU Lesser General Public |
| License, the Free Software Foundation gives you unlimited |
| permission to link the compiled version of this file with other |
| programs, and to distribute those programs without any restriction |
| coming from the use of this file. (The GNU Lesser General Public |
| License restrictions do apply in other respects; for example, they |
| cover modification of the file, and distribution when not linked |
| into another program.) |
| |
| Note that people who make modified versions of this file are not |
| obligated to grant this special exception for their modified |
| versions; it is their choice whether to do so. The GNU Lesser |
| General Public License gives permission to release a modified |
| version without this exception; this exception also makes it |
| possible to release a modified version which carries forward this |
| exception. |
| |
| 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 <sysdep.h> |
| #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" |
| 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. Also load the GOT pointer so that new PLT |
| calls work, like the one to __libc_start_main. */ |
| #ifdef PIC |
| addis r30,r13,_GLOBAL_OFFSET_TABLE_-L(branch)@ha |
| addis r8,r13,L(start_addresses)-L(branch)@ha |
| addi r30,r30,_GLOBAL_OFFSET_TABLE_-L(branch)@l |
| lwzu r13,L(start_addresses)-L(branch)@l(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: |
| .long 0 |
| weak_alias (__data_start, data_start) |
