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f6d452c2c0
unit's initialization code in case we're in a library
+ implemented InquireSignal(), AbandonSignalHandler(), HookSignal() and
UnhookSignal() in the sysutils unit
* for Kylix compatibility, these routines support operating on
SIGINT and SIGQUIT as well, although they are not hooked by default
by FPC. The run time errors/exception codes for these signals are
resp. 217 and 233 (same as in Kylix; I changed ENoWideStringSupport
to 234).
* changed the BSD syscall version of fpsigaction to use pointer
rather than "var" arguments (compatible with other targets, and
required to be able to pass nil arguments inside the system unit)
-> together fixes mantis #12704
git-svn-id: trunk@13077 -
84 lines
2.2 KiB
PHP
84 lines
2.2 KiB
PHP
{
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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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CONST FPU_ALL=$7F;
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function getfpustate(const Sigcontext:sigcontextRec):longint; {inline;}
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begin
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getfpustate:=0;
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end;
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procedure SignalToRunerror(Sig: longint;code:longint; var SigContext: SigContextRec); public name '_FPC_DEFAULTSIGHANDLER'; cdecl;
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var
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res,fpustate : word;
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begin
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res:=0;
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{$ifdef BSD}
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{$ifdef cpui386}
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fpustate:=0;
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asm
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fnstsw fpustate
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end;
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{$endif cpui386}
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{$endif BSD}
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case sig of
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SIGFPE :
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begin
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{ this is not allways necessary but I don't know yet
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how to tell if it is or not PM }
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res:=200;
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fpustate:=GetFPUState(SigContext);
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if (FpuState and FPU_All) <> 0 then
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begin
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{ first check the more precise options }
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if (FpuState and FPU_DivisionByZero)<>0 then
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res:=200
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else if (FpuState and FPU_Overflow)<>0 then
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res:=205
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else if (FpuState and FPU_Underflow)<>0 then
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res:=206
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else if (FpuState and FPU_Denormal)<>0 then
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res:=216
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else if (FpuState and (FPU_StackOverflow or FPU_StackUnderflow))<>0 then
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res:=207
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else if (FpuState and FPU_Invalid)<>0 then
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res:=216
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else
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res:=207; {'Coprocessor Error'}
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end;
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SysResetFPU;
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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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SIGINT:
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res:=217;
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SIGQUIT:
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res:=233;
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end;
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reenable_signal(sig);
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{ give runtime error at the position where the signal was raised }
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if res<>0 then
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begin
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{$ifdef cpui386}
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HandleErrorAddrFrame(res,pointer(SigContext.sc_eip),pointer(SigContext.sc_ebp));
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{$endif}
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end;
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end;
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