* initial revision of arm startup code

rtl/linux/arm/prt0.as

@@ -0,0 +1,91 @@
+/* Startup code for ARM & ELF
+   Copyright (C) 1995, 1996, 1997, 1998, 2001, 2002 Free Software Foundation, Inc.
+   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.
+
+   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.
+
+	Note that the code in the .init section has already been run.
+	This includes _init and _libc_init
+
+
+	At this entry point, most registers' values are unspecified, except:
+
+   a1		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.
+
+   sp		The stack contains the arguments and environment:
+		0(sp)			argc
+		4(sp)			argv[0]
+		...
+		(4*argc)(sp)		NULL
+		(4*(argc+1))(sp)	envp[0]
+		...
+					NULL
+*/
+
+	.text
+	.globl _start
+	.type _start,#function
+_start:
+	/* Fetch address of fini */
+	ldr ip, =__libc_csu_fini
+
+	/* Clear the frame pointer since this is the outermost frame.  */
+	mov fp, #0
+
+	/* Pop argc off the stack and save a pointer to argv */
+	ldr a2, [sp], #4
+	mov a3, sp
+
+	/* Push stack limit */
+	str a3, [sp, #-4]!
+
+	/* Push rtld_fini */
+	str a1, [sp, #-4]!
+
+	/* Set up the other arguments in registers */
+	ldr a1, =main
+	ldr a4, =__libc_csu_init
+
+	/* Push fini */
+	str ip, [sp, #-4]!
+
+	/* __libc_start_main (main, argc, argv, init, fini, rtld_fini, stack_end) */
+
+	/* Let the libc call main and exit with its return code.  */
+	bl PASCALMAIN
+
+	/* should never get here....*/
+	bl abort
+
+/* 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
+
+/*
+  $Log$
+  Revision 1.1  2003-08-27 13:07:07  florian
+    * initial revision of arm startup code
+*/