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4c7c8b9c3a
* fixed initialisation of fpscr register to avoid spurious SIGPFE's
(uses mtfsb0 instruction, so added extra define in options.pas to avoid
requiring to start with a cross compiler)
82 lines
2.7 KiB
PHP
82 lines
2.7 KiB
PHP
{
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$Id$
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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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member 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; var info : tsiginfo_t;Var SigContext:SigContextRec); 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_INTDIV : Res:=200; {integer divide fault. Div0?}
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FPE_FLTOVF : Res:=205; {Overflow trap}
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FPE_FLTUND : Res:=206; {Stack over/underflow}
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FPE_FLTRES : Res:=208; {Device not available}
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FPE_FLTINV : Res:=207; {Invalid floating point operation}
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Else
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Res:=208; {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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{ triggered again immediately if we don't turn off the "exception occurred" }
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{ flags in fpscr }
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SigContext.uc_mcontext^.fs.fpscr := SigContext.uc_mcontext^.fs.fpscr and not($fffe0700);
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end;
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SIGILL,
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SIGBUS,
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SIGSEGV :
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res:=216;
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end;
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{$ifdef FPC_USE_SIGPROCMASK}
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reenable_signal(sig);
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{$endif }
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{ return to trampoline }
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if res <> 0 then
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begin
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SigContext.uc_mcontext^.ss.r3 := res;
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SigContext.uc_mcontext^.ss.r4 := SigContext.uc_mcontext^.ss.srr0;
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SigContext.uc_mcontext^.ss.r5 := SigContext.uc_mcontext^.ss.r1;
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pointer(SigContext.uc_mcontext^.ss.srr0) := @HandleErrorAddrFrame;
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end;
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end;
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{
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$Log$
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Revision 1.3 2004-01-10 00:16:21 jonas
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* fixed mtfsb0 instruction for assembler reader/writer
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* fixed initialisation of fpscr register to avoid spurious SIGPFE's
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(uses mtfsb0 instruction, so added extra define in options.pas to avoid
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requiring to start with a cross compiler)
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Revision 1.2 2004/01/08 21:52:34 jonas
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* fixed signal handling under 10.3.2, still have to verify whether it's
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backwards compatible
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Revision 1.1 2004/01/04 20:05:38 jonas
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* first working version of the Darwin/Mac OS X (for PowerPC) RTL
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Several non-essential units are still missing, but make cycle works
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Revision 1.1 2004/01/03 12:29:36 marco
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* now separately.
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}
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