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71 lines
2.5 KiB
PHP
71 lines
2.5 KiB
PHP
{
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This file is part of the Free Pascal run time library.
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(c) 2000-2003 by Marco van de Voort
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(c) 2011 by Jonas Maebe
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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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Signalhandler for FreeBSD/i386
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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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procedure SignalToRunerror(Sig: cint; info : PSigInfo; SigContext:PSigContext); public name '_FPC_DEFAULTSIGHANDLER'; cdecl;
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var
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res : 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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Case Info^.si_code Of
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FPE_FLTDIV : Res:=208; { floating point divide by zero }
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FPE_INTDIV : Res:=200; { floating point divide by zero }
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FPE_FLTOVF : Res:=205; { floating point overflow }
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FPE_FLTUND : Res:=206; { floating point underflow }
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FPE_FLTRES, { floating point inexact result }
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FPE_FLTINV : Res:=207; { invalid floating point operation }
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Else
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Res:=207; {coprocessor error}
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end;
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{ FPU exceptions are completely disabled by the kernel if one occurred, it }
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{ seems this is necessary to be able to return to user mode. They can be }
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{ enabled by executing a sigreturn, however then the exception is triggered }
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{ again immediately if we don't turn off the "exception occurred" flags }
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{ in fpscr }
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SigContext^.uc_mcontext.fpscr := SigContext^.uc_mcontext.fpscr and not($fffe0700);
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end;
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SIGILL,
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SIGBUS,
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SIGSEGV :
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res:=216;
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SIGINT:
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res:=217;
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SIGQUIT:
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res:=233;
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end;
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{$ifdef FPC_USE_SIGPROCMASK}
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reenable_signal(sig);
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{$endif }
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{ return to trampoline }
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if res <> 0 then
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begin
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SigContext^.uc_mcontext.gpr[3] := res;
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SigContext^.uc_mcontext.gpr[4] := SigContext^.uc_mcontext.iar;
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SigContext^.uc_mcontext.gpr[5] := SigContext^.uc_mcontext.gpr[1];
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{ the address of a function is a descriptor, and we need the actual
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address here -> dereference }
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pointer(SigContext^.uc_mcontext.iar) := ppointer(@HandleErrorAddrFrame)^;
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{ set corresponding TOC for the routine we are returning to }
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pointer(SigContext^.uc_mcontext.gpr[2]) := (ppointer(@HandleErrorAddrFrame)+1)^;
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end;
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end;
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