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117 lines
3.0 KiB
PHP
117 lines
3.0 KiB
PHP
{
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This file is part of the Free Pascal run time library.
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Copyright (c) 1999-2000 by Michael Van Canneyt,
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member of the Free Pascal development team.
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Signal handler is arch dependant due to processor to language
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exception conversion.
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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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const
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{ Bits in control register }
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RoundingMode = $30;
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RoundingPrecision = $c0;
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InexactDecimal = $100;
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InexactOperation = $200;
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DivideByZero = $400;
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UnderFlow = $800;
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OverFlow = $1000;
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OperandError = $2000;
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SignalingNaN = $4000;
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BranchOnUnordered = $800;
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fpucw : longint = {InexactOperation or }DivideByZero or
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OverFlow or OperandError or
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SignalingNaN or BranchOnUnordered;
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fpust : longint = 0;
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{ Bits in status register }
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FPU_Invalid = $80;
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FPU_Denormal = $8;
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FPU_DivisionByZero = $10;
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FPU_Overflow = $40;
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FPU_Underflow = $20;
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{ m68k is not stack based }
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FPU_StackUnderflow = $0;
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FPU_StackOverflow = $0;
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FPU_All = $f8;
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Procedure ResetFPU;
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begin
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asm
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fmove.l fpucw,fpcr
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fmove.l fpust,fpsr
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end;
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end;
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function GetFPUState(const SigContext : TSigContext) : longint;
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begin
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GetfpuState:=SigContext.psr;
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{$ifdef SYSTEM_DEBUG}
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Writeln(stderr,'FpuState = ',GetFpuState);
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{$endif SYSTEM_DEBUG}
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end;
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procedure SignalToRunerror(Sig: longint; Info : pointer; var SigContext: TSigContext); cdecl;
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var
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res,fpustate : word;
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begin
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res:=0;
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case sig of
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SIGFPE :
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begin
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{ this is not allways necessary but I don't know yet
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how to tell if it is or not PM }
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res:=200;
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fpustate:=GetFPUState(SigContext);
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if (FpuState and FPU_All) <> 0 then
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begin
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{ first check the more precise options }
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if (FpuState and FPU_DivisionByZero)<>0 then
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res:=200
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else if (FpuState and FPU_Overflow)<>0 then
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res:=205
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else if (FpuState and FPU_Underflow)<>0 then
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res:=206
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else if (FpuState and FPU_Denormal)<>0 then
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res:=216
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else if (FpuState and (FPU_StackOverflow or FPU_StackUnderflow))<>0 then
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res:=207
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else if (FpuState and FPU_Invalid)<>0 then
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res:=216
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else
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res:=207; {'Coprocessor Error'}
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end;
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ResetFPU;
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end;
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SIGILL,
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SIGBUS,
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SIGSEGV :
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res:=216;
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end;
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reenable_signal(sig);
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{ give runtime error at the position where the signal was raised }
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if res<>0 then
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begin
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{ HandleErrorAddrFrame(res,SigContext.sc_pc,SigContext.sc_fp);}
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{ fp is not saved in context record :( }
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HandleError(res);
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HandleError(res);
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end;
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end;
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