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{
This file is part of the Free Pascal run time library.
Copyright (c) 1999-2000 by Michael Van Canneyt,
member of the Free Pascal development team.
Signal handler is arch dependant due to processor to language
exception conversion.
See the file COPYING.FPC, included in this distribution,
for details about the copyright.
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 : longint; SigInfo: PSigInfo; UContext: Pucontext);public name '_FPC_DEFAULTSIGHANDLER';cdecl;
var
res,fpustate : word;
begin
res:=0;
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;
if assigned(ucontext^.uc_mcontext.fpstate) then
begin
FpuState:=ucontext^.uc_mcontext.fpstate^.sw;
if (FpuState and FPU_ExceptionMask) <> 0 then
begin
{ first check the more precise options }
if (FpuState and FPU_DivisionByZero)<>0 then
res:=200
else if (FpuState and (FPU_StackOverflow or FPU_StackUnderflow or FPU_Invalid))<>0 Then
res:=207
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
res:=207; {'Coprocessor Error'}
end;
with ucontext^.uc_mcontext.fpstate^ do
sw:=sw and not FPU_ExceptionMask;
end;
end;
SIGBUS:
res:=214;
SIGILL:
if sse_check then
begin
os_supports_sse:=false;
res:=0;
inc(ucontext^.uc_mcontext.eip,3);
end
else
res:=216;
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
ucontext^.uc_mcontext.eax := res;
ucontext^.uc_mcontext.edx := ucontext^.uc_mcontext.eip;
ucontext^.uc_mcontext.ecx := ucontext^.uc_mcontext.ebp;
ucontext^.uc_mcontext.eip := ptruint(@HandleErrorAddrFrame);
end;
end;
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