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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);cdecl;
var
res : word;
addr : pointer;
frame : pointer;
begin
res:=0;
addr:=nil;
case sig of
SIGFPE :
begin
addr := siginfo^._sifields._sigfault._addr;
res := 207;
case siginfo^.si_code of
FPE_INTDIV:
res:=200;
FPE_INTOVF:
res:=215;
FPE_FLTDIV:
res:=200;
FPE_FLTOVF:
res:=205;
FPE_FLTUND:
res:=206;
FPE_FLTRES,
FPE_FLTINV,
FPE_FLTSUB:
res:=216;
else
res:=207;
end;
end;
SIGILL,
SIGBUS,
SIGSEGV :
begin
addr := siginfo^._sifields._sigfault._addr;
res:=216;
end;
end;
reenable_signal(sig);
{ give runtime error at the position where the signal was raised }
if res<>0 then
begin
if assigned(UContext) then
begin
frame:=pointer(ptruint(UContext^.uc_mcontext.sigc_regs[29])); { stack pointer }
addr:=pointer(ptruint(UContext^.uc_mcontext.sigc_pc)); { program counter }
if sig=SIGFPE then
begin
{ Clear FPU exception bits }
UContext^.uc_mcontext.sigc_fpc_csr := UContext^.uc_mcontext.sigc_fpc_csr
and not (fpu_cause_mask or fpu_flags_mask);
end;
{ Change $a1, $a2, $a3 and sig_pc to HandleErrorAddrFrame parameters }
UContext^.uc_mcontext.sigc_regs[4]:=res;
UContext^.uc_mcontext.sigc_regs[5]:=ptrint(addr);
UContext^.uc_mcontext.sigc_regs[6]:=ptrint(frame);
UContext^.uc_mcontext.sigc_pc:=ptrint(@HandleErrorAddrFrame);
{ Let the system call HandleErrorAddrFrame }
exit;
end
else
begin
frame:=nil;
addr:=nil;
end;
if sig=SIGFPE then
set_fsr(get_fsr and not (fpu_cause_mask or fpu_flags_mask));
HandleErrorAddrFrame(res,addr,frame);
end;
end;
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