1/* Startup code for elf32-sparc
 2   Copyright (C) 1997-2025 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#define FRAME_SIZE 104
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, FRAME_SIZE, %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	ld	[%sp+168], %o1
57	add	%sp, 172, %o2
58
59  /* Load the addresses of the user entry points.  */
60#ifndef PIC
61	sethi	%hi(main), %o0
62	or	%o0, %lo(main), %o0
63#else
64	sethi	%gdop_hix22(main), %o0
65	xor	%o0, %gdop_lox10(main), %o0
66	ld	[%l7 + %o0], %o0, %gdop(main)
67#endif
68	mov	0, %o3		/* Used to be init.  */
69	mov	0, %o4		/* Used to be fini.  */
70
71  /* When starting a binary via the dynamic linker, %g1 contains the
72     address of the shared library termination function, which will be
73     registered with atexit().  If we are statically linked, this will
74     be NULL.  */
75	mov	%g1, %o5
76
77  /* Provide the highest stack address to update the __libc_stack_end (used
78     to enable executable stacks if required).  */
79	st	%sp, [%sp+23*4]
80
81  /* Let libc do the rest of the initialization, and call main.  */
82	call	__libc_start_main
83	 nop
84
85  /* Die very horribly if exit returns.  */
86	unimp
87
88	.size _start, .-_start
89
90/* Define a symbol for the first piece of initialized data.  */
91	.data
92	.globl	__data_start
93__data_start:
94	.long	0
95weak_alias (__data_start, data_start)