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111 lines
2.9 KiB
ActionScript
111 lines
2.9 KiB
ActionScript
/* 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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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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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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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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/* This is the canonical entry point, usually the first thing in the text
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segment.
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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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At this entry point, most registers' values are unspecified, except:
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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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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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.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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/* 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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/* calc envp */
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add a2,a2,#1
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add a2,sp,a2,LSL #2
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ldr ip,=operatingsystem_parameter_envp
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str sp,[a3]
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str a2,[ip]
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/* Save initial stackpointer */
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ldr ip,=__stkptr
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str sp,[ip]
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/* Let the libc call main and exit with its return code. */
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bl PASCALMAIN
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.globl _haltproc
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.type _haltproc,#function
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_haltproc:
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/* r0 contains exitcode */
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swi 0x900001
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b _haltproc
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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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.bss
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.comm __stkptr,4
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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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.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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/* 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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