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84 lines
1.9 KiB
ObjectPascal
84 lines
1.9 KiB
ObjectPascal
{
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This file is part of the Free Pascal run time library.
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Copyright (c) 2017 by the Free Pascal development team
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System Entry point for AROS, Pascal only programs
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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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unit si_prc;
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interface
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implementation
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var
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AOS_ExecBase: Pointer; public name '_ExecBase';
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StkLen: LongInt; external name '__stklen';
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sysinit_jmpbuf: jmp_buf;
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ExitCode: LongInt;
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{$include execd.inc}
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{$include execf.inc}
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procedure PascalMainEntry; cdecl; forward;
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{ this function must be the first in this unit which contains code }
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function _FPC_proc_start(argv: pointer; argc: ptrint; argExecBase: Pointer): longint; cdecl; public name '_start';
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var
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sst: TStackSwapStruct;
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ssp: TStackSwapArgs;
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newStack: Pointer;
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newStackAligned: Pointer;
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task: PTask;
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begin
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AOS_ExecBase:=argExecBase;
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newStack:=nil;
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newStackAligned:=nil;
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task:=FindTask(nil);
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if (task^.tc_SPUpper-task^.tc_SPLower < StkLen) then
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begin
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newStack:=AllocVec(StkLen+16, MEMF_ANY);
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newStackAligned:=align(newStack,16);
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sst.stk_Lower:=newStackAligned;
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sst.stk_Upper:=newStackAligned+StkLen;
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sst.stk_Pointer:=newStackAligned+StkLen;
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FillChar(ssp,sizeof(ssp),0);
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NewStackSwap(@sst,@PascalMainEntry,@ssp);
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FreeVec(newStack);
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end
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else
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PascalMainEntry;
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_FPC_proc_start:=ExitCode;
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end;
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procedure _FPC_proc_halt(_ExitCode: longint); cdecl; public name '_haltproc';
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begin
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ExitCode:=_ExitCode;
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longjmp(sysinit_jmpbuf,1);
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end;
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procedure PascalMain; external name 'PASCALMAIN';
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procedure PascalMainEntry; cdecl;
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begin
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if setjmp(sysinit_jmpbuf) = 0 then
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PascalMain;
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end;
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end.
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