mirror of
https://gitlab.com/freepascal.org/fpc/source.git
synced 2025-11-04 07:43:04 +01:00
108 lines
3.2 KiB
ActionScript
108 lines
3.2 KiB
ActionScript
#
|
|
# This file is part of the Free Pascal run time library.
|
|
# Copyright (c) 1999-2000 by Michael Van Canneyt and Peter Vreman
|
|
# members of the Free Pascal development team.
|
|
#
|
|
# See the file COPYING.FPC, included in this distribution,
|
|
# for details about the copyright.
|
|
#
|
|
# This program 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.
|
|
#
|
|
#**********************************************************************}
|
|
#
|
|
# Linux ELF startup code for Free Pascal
|
|
#
|
|
#
|
|
# Stack layout at program start:
|
|
#
|
|
# nil
|
|
# envn
|
|
# ....
|
|
# .... ENVIRONMENT VARIABLES
|
|
# env1
|
|
# env0
|
|
# nil
|
|
# argn
|
|
# ....
|
|
# .... COMMAND LINE OPTIONS
|
|
# arg1
|
|
# arg0
|
|
# argc <--- esp
|
|
#
|
|
|
|
.file "cprt0.as"
|
|
.text
|
|
.globl _start
|
|
.type _start,@function
|
|
_start:
|
|
/* First locate the start of the environment variables */
|
|
popl %ecx /* Get argc in ecx */
|
|
movl %esp,%ebx /* Esp now points to the arguments */
|
|
leal 4(%esp,%ecx,4),%eax /* The start of the environment is: esp+4*eax+8 */
|
|
andl $0xfffffff8,%esp /* Align stack */
|
|
|
|
movl %eax,operatingsystem_parameter_envp /* Move the environment pointer */
|
|
movl %ecx,operatingsystem_parameter_argc /* Move the argument counter */
|
|
movl %ebx,operatingsystem_parameter_argv /* Move the argument pointer */
|
|
|
|
movl %eax,__environ /* libc environ */
|
|
|
|
pushl %eax
|
|
pushl %ebx
|
|
pushl %ecx
|
|
|
|
call __libc_init /* init libc */
|
|
movzwl __fpu_control,%eax
|
|
pushl %eax
|
|
call __setfpucw
|
|
popl %eax
|
|
pushl $_fini
|
|
call atexit
|
|
popl %eax
|
|
call _init
|
|
|
|
popl %eax
|
|
popl %eax
|
|
|
|
/* Save initial stackpointer */
|
|
movl %esp,__stkptr
|
|
|
|
xorl %ebp,%ebp
|
|
call PASCALMAIN /* start the program */
|
|
|
|
.globl _haltproc
|
|
.type _haltproc,@function
|
|
_haltproc:
|
|
_haltproc2: # GAS <= 2.15 bug: generates larger jump if a label is exported
|
|
movzwl operatingsystem_result,%ebx
|
|
pushl %ebx
|
|
call exit
|
|
xorl %eax,%eax
|
|
incl %eax /* eax=1, exit call */
|
|
popl %ebx
|
|
int $0x80
|
|
jmp _haltproc2
|
|
|
|
.data
|
|
|
|
.bss
|
|
.type __stkptr,@object
|
|
.size __stkptr,4
|
|
.global __stkptr
|
|
__stkptr:
|
|
.skip 4
|
|
|
|
.type operatingsystem_parameters,@object
|
|
.size operatingsystem_parameters,12
|
|
operatingsystem_parameters:
|
|
.skip 3*4
|
|
|
|
.global operatingsystem_parameter_envp
|
|
.global operatingsystem_parameter_argc
|
|
.global operatingsystem_parameter_argv
|
|
.set operatingsystem_parameter_envp,operatingsystem_parameters+0
|
|
.set operatingsystem_parameter_argc,operatingsystem_parameters+4
|
|
.set operatingsystem_parameter_argv,operatingsystem_parameters+8
|