1/* Startup code for elf32-sparc
2 Copyright (C) 1997-2026 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)