1/* Startup code for elf64-sparc
  2   Copyright (C) 1997-2020 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	sethi	%hi(__libc_csu_init), %o3
 64	sethi	%hi(__libc_csu_fini), %o4
 65	or	%o0, %lo(main), %o0
 66	or	%o3, %lo(__libc_csu_init), %o3
 67	or	%o4, %lo(__libc_csu_fini), %o4
 68#else
 69	sethi	%gdop_hix22(main), %o0
 70	sethi	%gdop_hix22(__libc_csu_init), %o3
 71	sethi	%gdop_hix22(__libc_csu_fini), %o4
 72	xor	%o0, %gdop_lox10(main), %o0
 73	xor	%o3, %gdop_lox10(__libc_csu_init), %o3
 74	xor	%o4, %gdop_lox10(__libc_csu_fini), %o4
 75	ldx	[%l7 + %o0], %o0, %gdop(main)
 76	ldx	[%l7 + %o3], %o3, %gdop(__libc_csu_init)
 77	ldx	[%l7 + %o4], %o4, %gdop(__libc_csu_fini)
 78#endif
 79
 80  /* When starting a binary via the dynamic linker, %g1 contains the
 81     address of the shared library termination function, which will be
 82     registered with atexit().  If we are statically linked, this will
 83     be NULL.  */
 84	mov     %g1, %o5
 85
 86  /* Let libc do the rest of the initialization, and call main.  */
 87	call    __libc_start_main
 88	 nop
 89
 90  /* Die very horribly if exit returns.  */
 91	illtrap	0
 92
 93	.size _start, .-_start
 94
 95/* Define a symbol for the first piece of initialized data.  */
 96	.data
 97	.globl	__data_start
 98__data_start:
 99	.long	0
100weak_alias (__data_start, data_start)