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
83
84
85
86
87
88
89
90
91
92
93
94
95
|
/* Startup code for programs linked with GNU libc.
Copyright (C) 1998-2021 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
In addition to the permissions in the GNU Lesser General Public
License, the Free Software Foundation gives you unlimited
permission to link the compiled version of this file with other
programs, and to distribute those programs without any restriction
coming from the use of this file. (The GNU Lesser General Public
License restrictions do apply in other respects; for example, they
cover modification of the file, and distribution when not linked
into another program.)
Note that people who make modified versions of this file are not
obligated to grant this special exception for their modified
versions; it is their choice whether to do so. The GNU Lesser
General Public License gives permission to release a modified
version without this exception; this exception also makes it
possible to release a modified version which carries forward this
exception.
The GNU C Library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#include <sysdep.h>
/* We do not want .eh_frame info for crt1.o since crt1.o is linked
before crtbegin.o, the file defining __EH_FRAME_BEGIN__. */
#undef cfi_startproc
#define cfi_startproc
#undef cfi_endproc
#define cfi_endproc
/* These are the various addresses we require. */
#ifdef PIC
.section ".data"
#else
.section ".rodata"
#endif
.align 2
L(start_addresses):
.long _SDA_BASE_
.long main
.long __libc_csu_init
.long __libc_csu_fini
ASM_SIZE_DIRECTIVE(L(start_addresses))
.section ".text"
ENTRY(_start)
/* Save the stack pointer, in case we're statically linked under Linux. */
mr r9,r1
/* Set up an initial stack frame, and clear the LR. */
clrrwi r1,r1,4
#ifdef PIC
SETUP_GOT_ACCESS(r13,got_label)
li r0,0
#else
li r0,0
#endif
stwu r1,-16(r1)
mtlr r0
stw r0,0(r1)
/* Set r13 to point at the 'small data area', and put the address of
start_addresses in r8. Also load the GOT pointer so that new PLT
calls work, like the one to __libc_start_main. */
#ifdef PIC
addis r30,r13,_GLOBAL_OFFSET_TABLE_-got_label@ha
addis r8,r13,L(start_addresses)-got_label@ha
addi r30,r30,_GLOBAL_OFFSET_TABLE_-got_label@l
lwzu r13, L(start_addresses)-got_label@l(r8)
#else
lis r8,L(start_addresses)@ha
lwzu r13,L(start_addresses)@l(r8)
#endif
/* and continue in libc-start, in glibc. */
b JUMPTARGET(__libc_start_main)
END(_start)
/* Define a symbol for the first piece of initialized data. */
.section ".data"
.globl __data_start
__data_start:
.long 0
weak_alias (__data_start, data_start)
|
