Prepare for radical source tree reorganization. zack/build-layout-experiment

All top-level files and directories are moved into a temporary storage
directory, REORG.TODO, except for files that will certainly still
exist in their current form at top level when we're done (COPYING,
COPYING.LIB, LICENSES, NEWS, README), all old ChangeLog files (which
are moved to the new directory OldChangeLogs, instead), and the
generated file INSTALL (which is just deleted; in the new order, there
will be no generated files checked into version control).

1 files changed, 100 insertions, 0 deletions

diff --git a/REORG.TODO/sysdeps/s390/s390-64/start.S b/REORG.TODO/sysdeps/s390/s390-64/start.S
new file mode 100644
index 0000000000..d8e65450d8
--- /dev/null
+++ b/REORG.TODO/sysdeps/s390/s390-64/start.S
@@ -0,0 +1,100 @@
+/* Startup code compliant to the 64 bit S/390 ELF ABI.
+   Copyright (C) 2001-2017 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, see
+   <http://www.gnu.org/licenses/>.  */
+
+/*
+   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