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-/* Startup code for ARM & ELF
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- Copyright (C) 1995, 1996, 1997, 1998, 2001, 2002 Free Software Foundation, Inc.
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- This file is part of the GNU C Library.
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-
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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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-
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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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-
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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, write to the Free
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- Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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- 02111-1307 USA. */
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-
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-/* This is the canonical entry point, usually the first thing in the text
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- segment.
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-
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- Note that the code in the .init section has already been run.
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- This includes _init and _libc_init
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-
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-
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- At this entry point, most registers' values are unspecified, except:
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-
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- a1 Contains a function pointer to be registered with `atexit'.
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- This is how the dynamic linker arranges to have DT_FINI
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- functions called for shared libraries that have been loaded
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- before this code runs.
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-
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- sp The stack contains the arguments and environment:
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- 0(sp) argc
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- 4(sp) argv[0]
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- ...
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- (4*argc)(sp) NULL
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- (4*(argc+1))(sp) envp[0]
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- ...
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- NULL
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-*/
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-
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- .text
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- .globl _start
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- .type _start,#function
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-_start:
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- /* Clear the frame pointer since this is the outermost frame. */
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- mov fp, #0
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- ldmia sp!, {a2}
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-
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- /* Pop argc off the stack and save a pointer to argv */
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- ldr ip,=operatingsystem_parameter_argc
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- ldr a3,=operatingsystem_parameter_argv
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- str a2,[ip]
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-
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- /* calc envp */
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- add a4,a2,#1
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- add a4,sp,a4,LSL #2
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- ldr ip,=operatingsystem_parameter_envp
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-
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- str sp,[a3]
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- str a4,[ip]
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-
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- /* Fetch address of fini */
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- ldr ip, =__libc_csu_fini
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-
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- /* argc already loaded to a2*/
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-
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- /* load argv
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- mov a3, sp
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-
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- /* Push stack limit */
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- str a3, [sp, #-4]!
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-
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- /* Push rtld_fini */
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- str a1, [sp, #-4]!
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-
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- /* Set up the other arguments in registers */
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- ldr a1, =PASCALMAIN
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- ldr a4, =__libc_csu_init
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-
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- /* Push fini */
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- str ip, [sp, #-4]!
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-
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- /* __libc_start_main (main, argc, argv, init, fini, rtld_fini, stack_end) */
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-
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- /* Let the libc call main and exit with its return code. */
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- bl __libc_start_main
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-
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- /* should never get here....*/
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- bl abort
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-
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- .globl _haltproc
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- .type _haltproc,#function
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-_haltproc:
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- ldr r0,=operatingsystem_result
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- ldrb r0,[r0]
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- swi 0x900001
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- b _haltproc
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-
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- /* Define a symbol for the first piece of initialized data. */
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- .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 data_start
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- data_start = __data_start
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-
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-.bss
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- .comm operatingsystem_parameter_envp,4
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- .comm operatingsystem_parameter_argc,4
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- .comm operatingsystem_parameter_argv,4
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-
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- .section ".comment"
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- .byte 0
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- .ascii "generated by FPC http://www.freepascal.org\0"
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-
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-/* We need this stuff to make gdb behave itself, otherwise
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- gdb will chokes with SIGILL when trying to debug apps.
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-*/
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- .section ".note.ABI-tag", "a"
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- .align 4
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- .long 1f - 0f
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- .long 3f - 2f
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- .long 1
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-0: .asciz "GNU"
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-1: .align 4
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-2: .long 0
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- .long 2,0,0
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-3: .align 4
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-
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-/*
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- $Log$
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- Revision 1.2 2004-11-05 12:47:45 florian
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- * inital implementation
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-*/
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