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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.
}
CONST FPU_ALL=$7F;
{$ifdef cpui386}
function getfpustate(sininfo:psiginfo):longint; {inline;}
begin
if ptruint(sininfo)> high(word) then
getfpustate:=sininfo^.si_code
else
getfpustate:=word(ptruint(sininfo));
end;
function getaltfpustate(sigcontext:psigcontextrec):longint; {inline;}
begin
if assigned(sigcontext) then
getaltfpustate:=sigcontext^.sc_fpustate^.en_sw
else
getaltfpustate:=0;
end;
{$endif}
procedure SignalToRunerror(Sig: longint;sininfo:psiginfo; SigContext: PSigContextRec); public name '_FPC_DEFAULTSIGHANDLER'; cdecl;
var
res,fpustate : word;
begin
res:=0;
{$ifdef BSD}
{$ifdef cpui386}
fpustate:=0;
asm
fnstsw fpustate
end;
{$endif cpui386}
{$endif BSD}
case sig of
SIGFPE :
begin
{ this is not allways necessary but I don't know yet
how to tell if it is or not PM }
res:=200;
{$ifdef cpui386}
fpustate:=GetaltFPUState(sigcontext);
{$else}
fpustate:=0;
{$endif}
if (FpuState and FPU_All) <> 0 then
begin
{ first check the more precise options }
if (FpuState and FPU_DivisionByZero)<>0 then
res:=200
else if (FpuState and FPU_Overflow)<>0 then
res:=205
else if (FpuState and FPU_Underflow)<>0 then
res:=206
else if (FpuState and FPU_Denormal)<>0 then
res:=216
else if (FpuState and (FPU_StackOverflow or FPU_StackUnderflow))<>0 then
res:=207
else if (FpuState and FPU_Invalid)<>0 then
res:=216
else
res:=207; {'Coprocessor Error'}
end;
SysResetFPU;
end;
SIGILL,
SIGBUS,
SIGSEGV :
res:=216;
SIGINT:
res:=217;
SIGQUIT:
res:=233;
end;
reenable_signal(sig);
{ give runtime error at the position where the signal was raised }
if res<>0 then
begin
{$ifdef cpux86_64}
HandleErrorAddrFrame(res,pointer(SigContext^.sc_rip),pointer(SigContext^.sc_rbp));
{$endif}
end;
end;
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