1/* Startup code for elf32-sparc
2   Copyright (C) 1997-2022 Free Software Foundation, Inc.
3   This file is part of the GNU C Library.
4
5   The GNU C Library is free software; you can redistribute it and/or
6   modify it under the terms of the GNU Lesser General Public
7   License as published by the Free Software Foundation; either
8   version 2.1 of the License, or (at your option) any later version.
9
10   In addition to the permissions in the GNU Lesser General Public
11   License, the Free Software Foundation gives you unlimited
12   permission to link the compiled version of this file with other
13   programs, and to distribute those programs without any restriction
14   coming from the use of this file. (The GNU Lesser General Public
15   License restrictions do apply in other respects; for example, they
16   cover modification of the file, and distribution when not linked
17   into another program.)
18
19   Note that people who make modified versions of this file are not
20   obligated to grant this special exception for their modified
21   versions; it is their choice whether to do so. The GNU Lesser
22   General Public License gives permission to release a modified
23   version without this exception; this exception also makes it
24   possible to release a modified version which carries forward this
25   exception.
26
27   The GNU C Library is distributed in the hope that it will be useful,
28   but WITHOUT ANY WARRANTY; without even the implied warranty of
29   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
30   Lesser General Public License for more details.
31
32   You should have received a copy of the GNU Lesser General Public
33   License along with the GNU C Library; if not, see
34   <https://www.gnu.org/licenses/>.  */
35
36#include <sysdep.h>
37
38
39	.section ".text"
40	.align 4
41	.global _start
42	.type _start,#function
43_start:
44#ifdef PIC
45	SETUP_PIC_REG(l7)
46#endif
47
48  /* Terminate the stack frame, and reserve space for functions to
49     drop their arguments.  */
50	mov	%g0, %fp
51	sub	%sp, 6*4, %sp
52
53  /* Extract the arguments and environment as encoded on the stack.  The
54     argument info starts after one register window (16 words) past the SP.  */
55	ld	[%sp+22*4], %o1
56	add	%sp, 23*4, %o2
57
58  /* Load the addresses of the user entry points.  */
59#ifndef PIC
60	sethi	%hi(main), %o0
61	or	%o0, %lo(main), %o0
62#else
63	sethi	%gdop_hix22(main), %o0
64	xor	%o0, %gdop_lox10(main), %o0
65	ld	[%l7 + %o0], %o0, %gdop(main)
66#endif
67	mov	0, %o3		/* Used to be init.  */
68	mov	0, %o4		/* Used to be fini.  */
69
70  /* When starting a binary via the dynamic linker, %g1 contains the
71     address of the shared library termination function, which will be
72     registered with atexit().  If we are statically linked, this will
73     be NULL.  */
74	mov	%g1, %o5
75
76  /* Let libc do the rest of the initialization, and call main.  */
77	call	__libc_start_main
78	 nop
79
80  /* Die very horribly if exit returns.  */
81	unimp
82
83	.size _start, .-_start
84
85/* Define a symbol for the first piece of initialized data.  */
86	.data
87	.globl	__data_start
88__data_start:
89	.long	0
90weak_alias (__data_start, data_start)
91