/* * libc/sysdeps/linux/microblaze/crt0.S -- Initial program entry point for linux/microblaze * * Copyright (C) 2003 John Williams <jwilliams@itee.uq.edu.au> * Copyright (C) 2001,2002 NEC Corporation * Copyright (C) 2001,2002 Miles Bader <miles@gnu.org> * * This file is subject to the terms and conditions of the GNU Lesser * General Public License. See the file COPYING.LIB in the main * directory of this archive for more details. * * Written by Miles Bader <miles@gnu.org> */ #include <clinkage.h> /* Upon entry, the stack contains the following data: argc, argv[0], ..., argv[argc-1], 0, envp[0], ..., 0 */ .text C_ENTRY(_start): lw r5, r0, r1 /* Arg 0: argc */ addi r6, r1, 4 /* Arg 1: argv */ /* Arg 2: envp */ addi r3, r5, 1 /* skip argc elements to get envp start */ /* ...plus the NULL at the end of argv */ add r3, r3, r3 /* Make word offset */ add r3, r3, r3 add r7, r6, r3 /* add to argv to get offset */ /* tail-call uclibc's startup routine */ brid C_SYMBOL_NAME(__uClibc_main) nop /* 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. */ L_dummy_main_reference: .long C_SYMBOL_NAME(main) /* 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