/* Startup code compliant to the 64 bit S/390 ELF ABI.   Copyright (C) 2001, 2002, 2003, 2004, 2006 Free Software Foundation, Inc.   Contributed by Martin Schwidefsky (schwidefsky@de.ibm.com).   This file is part of the GNU C Library.   The GNU C Library is free software; you can redistribute it and/or   modify it under the terms of the GNU Lesser General Public   License as published by the Free Software Foundation; either   version 2.1 of the License, or (at your option) any later version.   In addition to the permissions in the GNU Lesser General Public   License, the Free Software Foundation gives you unlimited   permission to link the compiled version of this file with other   programs, and to distribute those programs without any restriction   coming from the use of this file. (The GNU Lesser General Public   License restrictions do apply in other respects; for example, they   cover modification of the file, and distribution when not linked   into another program.)   Note that people who make modified versions of this file are not   obligated to grant this special exception for their modified   versions; it is their choice whether to do so. The GNU Lesser   General Public License gives permission to release a modified   version without this exception; this exception also makes it   possible to release a modified version which carries forward this   exception.   The GNU C Library is distributed in the hope that it will be useful,   but WITHOUT ANY WARRANTY; without even the implied warranty of   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU   Lesser General Public License for more details.   You should have received a copy of the GNU Lesser General Public   License along with the GNU C Library; if not, write to the Free   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA   02111-1307 USA.  *//*   This is the canonical entry point, usually the first thing in the text   segment. Most registers' values are unspecified, except for:   %r14		Contains a function pointer to be registered with `atexit'.		This is how the dynamic linker arranges to have DT_FINI		functions called for shared libraries that have been loaded		before this code runs.   %r15		The stack contains the arguments and environment:		0(%r15)			argc		8(%r15)			argv[0]		...		(8*argc)(%r15)		NULL		(8*(argc+1))(%r15)	envp[0]		...					NULL*/	.text	.globl _start	.type _start,@function_start:	/* Load argc and argv from stack.  */	la	%r4,8(%r15)		# get argv	lg	%r3,0(%r15)		# get argc	/* Align the stack to a double word boundary.  */	lghi	%r0,-16	ngr	%r15,%r0	/* Setup a stack frame and a parameter area.  */	aghi	%r15,-176		# make room on stack	xc	0(8,%r15),0(%r15)	# clear back-chain	/* Set up arguments for __libc_start_main:	   main, argc, argv, envp, _init, _fini, rtld_fini, stack_end	   Note that envp will be determined later in __libc_start_main.	 */	stmg	%r14,%r15,160(%r15)	# store rtld_fini/stack_end to parameter area	la	%r7,160(%r15)	larl	%r6,__libc_csu_fini	# load pointer to __libc_csu_fini	larl	%r5,__libc_csu_init	# load pointer to __libc_csu_init	/* Ok, now branch to the libc main routine.  */#ifdef PIC	larl	%r2,main@GOTENT		# load pointer to main	lg	%r2,0(%r2)	brasl	%r14,__libc_start_main@plt#else	larl	%r2,main		# load pointer to main	brasl	%r14,__libc_start_main#endif	/* Crash if __libc_start_main returns.	*/	.word	0	/* Define a symbol for the first piece of initialized data.  */	.data	.globl __data_start__data_start:	.long 0	.weak data_start	data_start = __data_start