about summary refs log tree commit diff
path: root/sysdeps/powerpc/elf/start.S
blob: 63a49790599c60299a565c54e6fad55381717dbc (plain) (blame)
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
/* Startup code for programs linked with GNU libc.
   Copyright (C) 1998, 1999 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 Library General Public License as
   published by the Free Software Foundation; either version 2 of the
   License, or (at your option) any later version.

   In addition to the permissions in the GNU Library 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 Library 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.)

   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
   Library General Public License for more details.

   You should have received a copy of the GNU Library General Public
   License along with the GNU C Library; see the file COPYING.LIB.  If not,
   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
   Boston, MA 02111-1307, USA.  */

#include <sysdep.h>

 /* These are the various addresses we require.  */
	.section ".rodata"
	.align	2
	weak_extern(_init)
	weak_extern(_fini)
L(start_addresses):
	.long	_SDA_BASE_
	.long	JUMPTARGET(main)
	.long 	JUMPTARGET(_init)
	.long 	JUMPTARGET(_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
	li	r0,0
	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...  */
	lis	r8,L(start_addresses)@ha
	lwzu	r13,L(start_addresses)@l(r8)
 /* 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"
__data_start:
weak_alias (__data_start, data_start)