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@@ -0,0 +1,114 @@
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+{
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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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+
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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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+{
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+ Linux/uClibc startup code for Free Pascal
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+ taken from uClibc/sysdeps/linux/i386/crt1.S
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+
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+ %edx 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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+
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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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+
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+
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+procedure libc_init; external name '__uClibc_init';
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+procedure libc_fini; external name '__uClibc_fini';
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+procedure libc_exit; external name '_exit';
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+procedure libc_main; external name '__uClibc_main';
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+
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+procedure PASCALMAIN; external name 'PASCALMAIN';
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+
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+{******************************************************************************
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+ C library start/halt
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+ ******************************************************************************}
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+{$asmmode ATT}
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+
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+procedure _FPC_libc_start; assembler; nostackframe; public name '_start';
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+asm
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+ xorl %ebp,%ebp { clear outer most frame for backtraces }
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+ popl %esi { Get argc in ecx }
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+ movl %esp,%ecx { Esp now points to the arguments }
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+ leal 4(%esp,%esi,4),%eax { The start of the environment is: esp+4*eax+8 }
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+ andl $0xfffffff0,%esp { Align stack }
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+ pushl %eax { push garbage, so we push 32 bytes in total }
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+
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+ movl %eax,operatingsystem_parameter_envp { save the environment pointer }
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+ movl %esi,operatingsystem_parameter_argc { save the argument counter }
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+ movl %ecx,operatingsystem_parameter_argv { save the argument pointer }
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+ movl %esp,initialstkptr { save initial stack pointer }
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+
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+ pushl %esp { provide highest stack address to C library }
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+ pushl %edx { push address of shared library finalization }
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+
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+{$ifdef PIC}
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+ call .L0
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+.L0:
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+ pop %ebx
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+ addl $_GLOBAL_OFFSET_TABLE_+[.-.L0],%ebx
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+
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+ pushl _fini@GOT(%ebx) { push address of entry points }
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+ pushl _init@GOT(%ebx)
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+
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+ pushl %ecx { push argv }
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+ pushl %esi { push argc }
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+
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+ pushl $PASCALMAIN { push fpc main procedure }
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+ call libc_main { let fpc main be called from libc startup }
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+{$else}
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+ pushl $libc_fini { push address of entry points }
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+ pushl $libc_init
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+
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+ pushl %ecx { push argv }
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+ pushl %esi { push argc }
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+
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+ pushl $PASCALMAIN { push fpc main procedure }
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+ call libc_main { let fpc main be called from libc startup }
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+{$endif}
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+end;
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+
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+procedure _FPC_libc_haltproc; assembler; nostackframe; public name '_haltproc';
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+asm
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+.Lhaltproc:
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+{$if sizeof(ExitCode)=2}
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+ movzwl ExitCode,%ebx
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+{$else}
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+ mov ExitCode,%ebx
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+{$endif}
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+ pushl %ebx
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+ call libc_exit
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+ xorl %eax,%eax
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+ incl %eax { eax=1, exit call }
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+ popl %ebx
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+ int $0x80
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+ jmp .Lhaltproc
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+end;
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+
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micha