1/* Startup code for elf64-sparc
2   Copyright (C) 1997-2021 Free Software Foundation, Inc.
3   This file is part of the GNU C Library.
4   Contributed by Richard Henderson <richard@gnu.ai.mit.edu>, 1997.
5
6   The GNU C Library is free software; you can redistribute it and/or
7   modify it under the terms of the GNU Lesser General Public
8   License as published by the Free Software Foundation; either
9   version 2.1 of the License, or (at your option) any later version.
10
11   In addition to the permissions in the GNU Lesser General Public
12   License, the Free Software Foundation gives you unlimited
13   permission to link the compiled version of this file with other
14   programs, and to distribute those programs without any restriction
15   coming from the use of this file. (The GNU Lesser General Public
16   License restrictions do apply in other respects; for example, they
17   cover modification of the file, and distribution when not linked
18   into another program.)
19
20   Note that people who make modified versions of this file are not
21   obligated to grant this special exception for their modified
22   versions; it is their choice whether to do so. The GNU Lesser
23   General Public License gives permission to release a modified
24   version without this exception; this exception also makes it
25   possible to release a modified version which carries forward this
26   exception.
27
28   The GNU C Library is distributed in the hope that it will be useful,
29   but WITHOUT ANY WARRANTY; without even the implied warranty of
30   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
31   Lesser General Public License for more details.
32
33   You should have received a copy of the GNU Lesser General Public
34   License along with the GNU C Library; if not, see
35   <https://www.gnu.org/licenses/>.  */
36
37#include <sysdep.h>
38
39
40	.section ".text"
41	.align 4
42	.global _start
43	.type _start,#function
44_start:
45#ifdef PIC
46	SETUP_PIC_REG(l7)
47#endif
48
49  /* Terminate the stack frame, and reserve space for functions to
50     drop their arguments.  */
51	mov	%g0, %fp
52	sub	%sp, 6*8, %sp
53
54  /* Extract the arguments and environment as encoded on the stack.  The
55     argument info starts after one register window (16 words) past the SP,
56     plus the bias we added, plus the magic v9 STACK_BIAS.  */
57	ldx	[%sp+STACK_BIAS+22*8], %o1
58	add	%sp, STACK_BIAS+23*8, %o2
59
60  /* Load the addresses of the user entry points.  */
61#ifndef PIC
62	sethi	%hi(main), %o0
63	or	%o0, %lo(main), %o0
64#else
65	sethi	%gdop_hix22(main), %o0
66	xor	%o0, %gdop_lox10(main), %o0
67	ldx	[%l7 + %o0], %o0, %gdop(main)
68#endif
69	mov	0, %o3		/* Used to be init.  */
70	mov	0, %o4		/* Used to be fini.  */
71
72  /* When starting a binary via the dynamic linker, %g1 contains the
73     address of the shared library termination function, which will be
74     registered with atexit().  If we are statically linked, this will
75     be NULL.  */
76	mov     %g1, %o5
77
78  /* Let libc do the rest of the initialization, and call main.  */
79	call    __libc_start_main
80	 nop
81
82  /* Die very horribly if exit returns.  */
83	illtrap	0
84
85	.size _start, .-_start
86
87/* Define a symbol for the first piece of initialized data.  */
88	.data
89	.globl	__data_start
90__data_start:
91	.long	0
92weak_alias (__data_start, data_start)
93