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{
This file is part of the Free Pascal run time library.
(c) 2000-2003 by Marco van de Voort
member of the Free Pascal development team.
See the file COPYING.FPC, included in this distribution,
for details about the copyright.
Signalhandler for FreeBSD/i386
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY;without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
}
procedure SignalToRunerror(Sig: cint; info : PSigInfo; SigContext:PSigContext); public name '_FPC_DEFAULTSIGHANDLER'; cdecl;
var
res : word;
begin
res:=0;
case sig of
SIGFPE :
begin
Case Info^.si_code Of
FPE_FLTDIV,
FPE_INTDIV : Res:=200; { floating point divide by zero }
FPE_FLTOVF : Res:=205; { floating point overflow }
FPE_FLTUND : Res:=206; { floating point underflow }
FPE_FLTRES, { floating point inexact result }
FPE_FLTINV : Res:=207; { invalid floating point operation }
Else
Res:=207; {coprocessor error}
end;
{ FPU exceptions are completely disabled by the kernel if one occurred, it }
{ seems this is necessary to be able to return to user mode. They can be }
{ enabled by executing a sigreturn, however then the exception is triggered }
{ again immediately if we don't turn off the "exception occurred" flags }
{ in fpscr }
SigContext^.uc_mcontext^.fs.fpscr := SigContext^.uc_mcontext^.fs.fpscr and not($fffe0700);
end;
SIGILL,
SIGBUS,
SIGSEGV :
res:=216;
SIGINT:
res:=217;
SIGQUIT:
res:=233;
end;
{$ifdef FPC_USE_SIGPROCMASK}
reenable_signal(sig);
{$endif }
{ return to trampoline }
if res <> 0 then
begin
SigContext^.uc_mcontext^.ss.r3 := res;
SigContext^.uc_mcontext^.ss.r4 := SigContext^.uc_mcontext^.ss.srr0;
SigContext^.uc_mcontext^.ss.r5 := SigContext^.uc_mcontext^.ss.r1;
pointer(SigContext^.uc_mcontext^.ss.srr0) := @HandleErrorAddrFrame;
end;
end;
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