/* * Copyright (C) 2003 by Erik Andersen * * This program 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. * * This program 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 this program; if not, write to the Free Software Foundation, * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ /* Integer registers. */ #define r0 0 #define r1 1 #define r2 2 #define r3 3 #define r4 4 #define r5 5 #define r6 6 #define r7 7 #define r8 8 #define r9 9 #define r13 13 #define r31 31 #include <features.h> .section ".text" .globl _start .type _start,@function #if defined L_crt0 || defined L_Scrt0 || ! defined __UCLIBC_CTOR_DTOR__ .type __uClibc_main,%function #else .weak _init .weak _fini .type __uClibc_start_main,%function #endif /* Stick in a dummy reference to main(), so that if an application * is linking when the main() function is in a static library (.a) * we can be sure that main() actually gets linked in */ .type main,%function _start: /* Save the stack pointer, in case we're statically linked under Linux. */ mr r9,r1 #if defined L_Scrt0 || defined L_Scrt1 bl _GLOBAL_OFFSET_TABLE_-4@local mflr r31 #endif /* Set up an initial stack frame, and clear the LR. */ clrrwi r1,r1,4 li r0,0 stwu r1,-16(r1) mtlr r0 stw r0,0(r1) /* find argc from the stack pointer */ lwz r3,0(r9) /* find argv one word offset from the stack pointer */ addi r4,r9,4 /* find environment pointer (argv+argc+1) */ lwz r5,0(r9) addi r5,r5,1 rlwinm r5,r5,2,0,29 add r5,r5,r4 mr r8,r7 /* Pass _dl_fini from ldso */ /* Ok, now run uClibc's main() -- shouldn't return */ #if (defined L_crt1 || defined L_Scrt1) && defined __UCLIBC_CTOR_DTOR__ # ifdef L_Scrt1 lwz r6,_init@got(r31) lwz r7,_fini@got(r31) b __uClibc_start_main@plt # else lis r6,_init@ha # load top 16 bits addi r6,r6,_init@l # load bottom 16 bits lis r7,_fini@ha # load top 16 bits of &msg addi r7,r7,_fini@l # load bottom 16 bits b __uClibc_start_main # endif #else # ifdef L_Scrt0 b __uClibc_main@plt # else b __uClibc_main # endif #endif .size _start,.-_start /* Define a symbol for the first piece of initialized data. */ .data .globl __data_start __data_start: .long 0 .weak data_start data_start = __data_start