1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
|
/*
* 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)
/* 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
|
