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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 -
94 lines
2.6 KiB
PHP
94 lines
2.6 KiB
PHP
{
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This file is part of the Free Pascal run time library.
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Copyright (c) 1999-2000 by Michael Van Canneyt,
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member of the Free Pascal development team.
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Signal handler is arch dependant due to processor to language
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exception conversion.
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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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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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procedure SignalToRunerror(sig : longint; SigContext: PSigContextRec; uContext: Pvregs);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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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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// fp_status always here under BeOS and x86 CPU
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// (fp_status is not behind a pointer in the BeOS context record)
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FpuState:=ucontext^.xregs.state.old_format.fp_status;
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if (FpuState and FPU_ExceptionMask) <> 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_StackOverflow or FPU_StackUnderflow or FPU_Invalid))<>0 Then
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res:=207
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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
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res:=207; {'Coprocessor Error'}
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end;
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with ucontext^.xregs.state.old_format do
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begin
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fp_status := fp_status and not FPU_ExceptionMask;
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end;
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SysResetFPU;
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end;
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(* SIGBUS: {Same as SIGSEGV under BeOS}
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begin
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res:=214;
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end; *)
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SIGILL:
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begin
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if sse_check then
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begin
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os_supports_sse := false;
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res := 0;
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inc(ucontext^.eip, 3);
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end
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else
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res:=216;
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end;
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SIGSEGV :
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begin
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res:=216;
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end;
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SIGINT:
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begin
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res:=217;
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end;
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SIGQUIT:
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begin
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res:=233;
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end;
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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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HandleErrorAddrFrame(res, pointer(ucontext^.eip),
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pointer(ucontext^.ebp));
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end;
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end;
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