mirror of
https://gitlab.com/freepascal.org/fpc/source.git
synced 2025-10-17 23:11:47 +02:00
0ad1a26c61
startup for Linux/i386 (since the code generator won't keep the 16 byte
alignment (yet?) for that platform, it won't make much difference in
practice)
git-svn-id: trunk@22383 -
113 lines
3.3 KiB
ActionScript
113 lines
3.3 KiB
ActionScript
#
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# This file is part of the Free Pascal run time library.
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# Copyright (c) 1999-2004 by Michael Van Canneyt, Peter Vreman,
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# & Daniel Mantione, members of the Free Pascal development team.
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#
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# See the file COPYING.FPC, included in this distribution,
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# for details about the copyright.
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#
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# This program 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.
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#
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#**********************************************************************}
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#
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# Linux ELF startup code for Free Pascal
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#
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# The code in this file is the default startup code, it is used unless
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# libc is linked in, profiling is enabled or you are compiling a shared
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# library.
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#
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#
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# Stack layout at program start:
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#
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# nil
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# envn
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# ....
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# .... ENVIRONMENT VARIABLES
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# env1
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# env0
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# nil
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# argn
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# ....
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# .... COMMAND LINE OPTIONS
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# arg1
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# arg0
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# argc <--- esp
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#
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.file "prt0.as"
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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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/* First locate the start of the environment variables */
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popl %ecx /* Get argc in ecx */
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movl %esp,%ebx /* Esp now points to the arguments */
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leal 4(%esp,%ecx,4),%eax /* The start of the environment is: esp+4*eax+4 */
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andl $0xfffffff0,%esp /* Align stack to 16 bytes */
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leal operatingsystem_parameters,%edi
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stosl /* Move the environment pointer */
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xchg %ecx,%eax
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stosl /* Move the argument counter */
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xchg %ebx,%eax
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stosl /* Move the argument pointer */
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fninit /* initialize fpu */
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fwait
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fldcw ___fpucw
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# /* Initialize gs for thread local storage */
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# movw %ds,%ax
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# movw %ax,%gs
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/* Save initial stackpointer */
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movl %esp,__stkptr
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xorl %ebp,%ebp
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call PASCALMAIN
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.globl _haltproc
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.type _haltproc,@function
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_haltproc:
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_haltproc2: # GAS <= 2.15 bug: generates larger jump if a label is exported
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movl $252,%eax /* exit_group */
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movzwl operatingsystem_result,%ebx
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int $0x80
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movl $1,%eax /* exit */
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movzwl operatingsystem_result,%ebx
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int $0x80
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jmp _haltproc2
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.data
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.type __fpucw,@object
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.size __fpucw,4
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.global __fpucw
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___fpucw:
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.long 0x1332
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.bss
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.type __stkptr,@object
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.size __stkptr,4
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.global __stkptr
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__stkptr:
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.skip 4
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.type operatingsystem_parameters,@object
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.size operatingsystem_parameters,12
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operatingsystem_parameters:
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.skip 3*4
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.global operatingsystem_parameter_envp
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.global operatingsystem_parameter_argc
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.global operatingsystem_parameter_argv
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.set operatingsystem_parameter_envp,operatingsystem_parameters+0
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.set operatingsystem_parameter_argc,operatingsystem_parameters+4
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.set operatingsystem_parameter_argv,operatingsystem_parameters+8
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//.section .threadvar,"aw",@nobits
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.comm ___fpc_threadvar_offset,4
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.section .note.GNU-stack,"",%progbits
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