mirror of
https://gitlab.com/freepascal.org/fpc/source.git
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149 lines
3.8 KiB
PHP
149 lines
3.8 KiB
PHP
{
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This file is part of the Free Pascal run time library.
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Copyright (c) 2005 by Michael Van Canneyt, Peter Vreman,
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& Daniel Mantione, members of the Free Pascal development team.
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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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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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Linux ELF startup code for Free Pascal
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Stack layout at program start:
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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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var
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gmon_etext: longint; external name '_etext';
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gmon_start: longint; external name '_start';
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gmon_mcleanup: procedure; external name '_mcleanup';
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libc21_fpc_ret, libc21_fpc_ret_ebx: ptrint; { return address to libc }
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libc21_fpc_ret_esi, libc21_fpc_ret_edi: ptrint;
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gmon_monstarted: longint = 0;
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procedure gmon_monstartup; external name 'monstartup';
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procedure libc_atexit; external name 'atexit';
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procedure libc_exit; external name '__libc_exit';
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procedure libc_init; external name '__libc_init';
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procedure libc_setfpucw; external name '__setfpucw';
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procedure libc_start_main; external name '__libc_start_main';
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procedure PASCALMAIN; external name 'PASCALMAIN';
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{******************************************************************************
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glibc 2.1 lib + profiling start/halt
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******************************************************************************}
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{$asmmode ATT}
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procedure _FPC_libc21_gprof_gmon_start; assembler; nostackframe;
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asm
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pushl %ebp
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movl gmon_monstarted,%eax
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leal 0x1(%eax),%edx
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movl %esp,%ebp
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movl %edx,gmon_monstarted
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testl %eax,%eax
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jnz .Lnomonstart
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pushl $gmon_etext { Initialize gmon }
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pushl $gmon_start
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call gmon_monstartup
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addl $8,%esp
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pushl $gmon_mcleanup
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call libc_atexit
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addl $4,%esp
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.Lnomonstart:
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movl %ebp,%esp
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popl %ebp
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ret
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end;
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procedure _FPC_libc21_gprof_start; assembler; nostackframe; public name '_start';
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asm
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{ First locate the start of the environment variables }
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popl %esi
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movl %eax,%edi
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movl %esp,%ebx { Points to the arguments }
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movl %esi,%eax
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incl %eax
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shll $2,%eax
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addl %esp,%eax
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andl $0xfffffff8,%esp { Align stack }
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movl %eax,operatingsystem_parameter_envp { Move the environment pointer }
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movl %esi,operatingsystem_parameter_argc { Move the argument counter }
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movl %ebx,operatingsystem_parameter_argv { Move the argument pointer }
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movl %edi,%eax
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xorl %ebp,%ebp
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pushl %eax
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pushl %esp
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pushl %edx
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pushl $.Lfini_dummy
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pushl $.Linit_dummy
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pushl %ebx
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pushl %esi
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pushl $.Lcmain
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call libc_start_main
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.Linit_dummy:
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.Lfini_dummy:
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ret
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{ fake main routine which will be run from libc }
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.Lcmain:
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{ save return address }
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popl %eax
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movl %eax,libc21_fpc_ret
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movl %ebx,libc21_fpc_ret_ebx
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movl %esi,libc21_fpc_ret_esi
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movl %edi,libc21_fpc_ret_edi
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pushl %eax
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call _FPC_libc21_gprof_gmon_start
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{ Save initial stackpointer }
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movl %esp,initialstkptr
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{ start the program }
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call PASCALMAIN
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hlt
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end;
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procedure _FPC_libc21_gprof_haltproc; assembler; nostackframe; public name '_haltproc';
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asm
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{$if sizeof(ExitCode)=2}
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movzwl ExitCode,%eax
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{$else}
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mov ExitCode,%eax
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{$endif}
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movl libc21_fpc_ret,%edx { return to libc }
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movl libc21_fpc_ret_ebx,%ebx
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movl libc21_fpc_ret_esi,%esi
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movl libc21_fpc_ret_edi,%edi
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push %edx
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ret
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end;
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