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
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
|
/*
* Copyright (C) 2013 Synopsys, Inc. (www.synopsys.com)
*
* Licensed under the LGPL v2.1 or later, see the file COPYING.LIB in this tarball.
*/
#include <features.h>
.text
#ifndef __UCLIBC_CTOR_DTOR__
.weak _init
.weak _fini
#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
.type _main,@function
/* When we enter this piece of code, the program stack looks like this:
argc argument counter (integer)
argv[0] program name (pointer)
argv[1...N] program args (pointers)
argv[argc-1] end of args (integer)
NULL
env[0...N] environment variables (pointers)
NULL
*/
.text
.align 4
.global __start
.hidden __start
.type __start,@function
__start:
mov fp, 0
ld_s r1, [sp] ; argc
mov_s r5, r0 ; rltd_fini
/* Use the universal 32-bit add instruction as 16-bit add_s was excluded from
ARCv3 ISA */
add r2, sp, 4 ; argv
#ifdef L_Scrt1
ld r0, [pcl, @main@gotpc]
ld r3, [pcl, @_init@gotpc]
ld r4, [pcl, @_fini@gotpc]
#else
mov_s r0, main
mov_s r3, _init
mov r4, _fini
#endif
and sp, sp, -8
mov r6, sp
/* __uClibc_main (main, argc, argv, init, fini, rtld_fini, stack_end) */
bl __uClibc_main
/* Should never get here.... */
flag 1
.size __start,.-__start
/* Implement a .note.ABI-tag section that is mandatory for Linux executables
according to LSB. See:
https://refspecs.linuxfoundation.org/LSB_1.2.0/gLSB/noteabitag.html.
Also: libc/sysdeps/linux/avr32/crt1.S. */
.section ".note.ABI-tag", "a"
.align 4
.long 1f - 0f /* Name length */
.long 3f - 2f /* Data length */
.long 1 /* Note type */
0: .asciz "GNU" /* Vendor name */
1: .align 4
2: .long 0 /* Note data: Linux executable */
#if (__GNUC__ > 4)
.long 4,8,0 /* Earliest compatible kernel for ABI v4 */
#else
.long 3,9,0 /* Earliest compatible kernel for ABI v3 */
#endif
3: .align 4 /* Pad out section */
|
