Blame sysdeps/powerpc/powerpc32/start.S

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/* Startup code for programs linked with GNU libc.
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   Copyright (C) 1998-2018 Free Software Foundation, Inc.
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   This file is part of the GNU C Library.
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   The GNU C Library is free software; you can redistribute it and/or
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   modify it under the terms of the GNU Lesser General Public
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   License as published by the Free Software Foundation; either
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   version 2.1 of the License, or (at your option) any later version.
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   In addition to the permissions in the GNU Lesser General Public
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   License, the Free Software Foundation gives you unlimited
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   permission to link the compiled version of this file with other
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   programs, and to distribute those programs without any restriction
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   coming from the use of this file. (The GNU Lesser General Public
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   License restrictions do apply in other respects; for example, they
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   cover modification of the file, and distribution when not linked
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   into another program.)
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   Note that people who make modified versions of this file are not
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   obligated to grant this special exception for their modified
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   versions; it is their choice whether to do so. The GNU Lesser
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   General Public License gives permission to release a modified
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   version without this exception; this exception also makes it
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   possible to release a modified version which carries forward this
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   exception.
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   The GNU C Library is distributed in the hope that it will be useful,
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   but WITHOUT ANY WARRANTY; without even the implied warranty of
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   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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   Lesser General Public License for more details.
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   You should have received a copy of the GNU Lesser General Public
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   License along with the GNU C Library; if not, see
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   <http://www.gnu.org/licenses/>.  */
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#include <sysdep.h>
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/* We do not want .eh_frame info for crt1.o since crt1.o is linked
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   before crtbegin.o, the file defining __EH_FRAME_BEGIN__.  */
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#undef cfi_startproc
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#define cfi_startproc
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#undef cfi_endproc
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#define cfi_endproc
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 /* These are the various addresses we require.  */
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#ifdef PIC
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	.section ".data"
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#else
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	.section ".rodata"
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#endif
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	.align	2
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L(start_addresses):
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	.long	_SDA_BASE_
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	.long	main
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	.long 	__libc_csu_init
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	.long 	__libc_csu_fini
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	ASM_SIZE_DIRECTIVE(L(start_addresses))
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	.section ".text"
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ENTRY(_start)
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 /* Save the stack pointer, in case we're statically linked under Linux.  */
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	mr	r9,r1
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 /* Set up an initial stack frame, and clear the LR.  */
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	clrrwi	r1,r1,4
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#ifdef PIC
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	SETUP_GOT_ACCESS(r13,got_label)
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	li	r0,0
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#else
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	li	r0,0
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#endif
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	stwu	r1,-16(r1)
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	mtlr	r0
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	stw	r0,0(r1)
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 /* Set r13 to point at the 'small data area', and put the address of
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    start_addresses in r8.  Also load the GOT pointer so that new PLT
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    calls work, like the one to __libc_start_main.  */
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#ifdef PIC
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	addis	r30,r13,_GLOBAL_OFFSET_TABLE_-got_label@ha
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	addis	r8,r13,L(start_addresses)-got_label@ha
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	addi	r30,r30,_GLOBAL_OFFSET_TABLE_-got_label@l
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	lwzu	r13, L(start_addresses)-got_label@l(r8)
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#else
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	lis	r8,L(start_addresses)@ha
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	lwzu	r13,L(start_addresses)@l(r8)
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#endif
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 /* and continue in libc-start, in glibc.  */
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	b	JUMPTARGET(__libc_start_main)
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END(_start)
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/* Define a symbol for the first piece of initialized data.  */
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	.section ".data"
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	.globl	__data_start
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__data_start:
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	.long	0
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weak_alias (__data_start, data_start)