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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 -
66 lines
2.1 KiB
PHP
66 lines
2.1 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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procedure SignalToRunerror(Sig: cint; info : PSigInfo; SigContext:PSigContext); public name '_FPC_DEFAULTSIGHANDLER'; cdecl;
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var
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res : 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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Case Info^.si_code Of
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FPE_FLTDIV,
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FPE_INTDIV : Res:=200; { floating point divide by zero }
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FPE_FLTOVF : Res:=205; { floating point overflow }
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FPE_FLTUND : Res:=206; { floating point underflow }
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FPE_FLTRES, { floating point inexact result }
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FPE_FLTINV : Res:=207; { invalid floating point operation }
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Else
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Res:=207; {coprocessor error}
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end;
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{ FPU exceptions are completely disabled by the kernel if one occurred, it }
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{ seems this is necessary to be able to return to user mode. They can be }
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{ enabled by executing a sigreturn, however then the exception is triggered }
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{ again immediately if we don't turn off the "exception occurred" flags }
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{ in fpscr }
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SigContext^.uc_mcontext^.fs.fpscr := SigContext^.uc_mcontext^.fs.fpscr and not($fffe0700);
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end;
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SIGILL,
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SIGBUS,
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SIGSEGV :
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res:=216;
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SIGINT:
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res:=217;
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SIGQUIT:
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res:=233;
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end;
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{$ifdef FPC_USE_SIGPROCMASK}
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reenable_signal(sig);
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{$endif }
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{ return to trampoline }
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if res <> 0 then
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begin
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SigContext^.uc_mcontext^.ss.r3 := res;
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SigContext^.uc_mcontext^.ss.r4 := SigContext^.uc_mcontext^.ss.srr0;
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SigContext^.uc_mcontext^.ss.r5 := SigContext^.uc_mcontext^.ss.r1;
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pointer(SigContext^.uc_mcontext^.ss.srr0) := @HandleErrorAddrFrame;
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end;
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end;
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