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-/* 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.
-
- 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.
-
- 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 __libc_start_main
-
- /* 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