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- /*
- * 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
- // Load SDAs
- la r2, r0, C_SYMBOL_NAME(_SDA_BASE_)
- la r13, r0, C_SYMBOL_NAME(_SDA2_BASE_)
- // 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)
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