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https://gitlab.com/freepascal.org/fpc/source.git
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128 lines
3.6 KiB
PHP
128 lines
3.6 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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function GetHandleErrorAddrFrameAddr: pointer;
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begin
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result:=@HandleErrorAddrFrame;
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end;
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{$if not(defined(CPUTHUMB)) and not(defined(CPUTHUMB2))}
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Procedure SignalToHandleErrorAddrFrame_ARM(Errno : longint;addr : CodePointer; frame : Pointer); nostackframe; assembler;
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asm
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{$if FPC_FULLVERSION >= 30200}
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.code 32
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{$endif}
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// the address is of the faulting instruction, and sigreturn will
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// skip it -> start with a nop
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nop
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push {r0,r1,r2,r3}
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bl GetHandleErrorAddrFrameAddr
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// overwrite last stack slot with new return address
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str r0, [sp,#12]
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// lr := addr
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ldr lr, [sp,#4]
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pop {r0,r1,r2,pc}
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.text
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end;
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{$endif not(defined(CPUTHUMB)) and not(defined(CPUTHUMB2))}
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{$if FPC_FULLVERSION >= 30200}
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{$if defined(CPU_HAS_THUMB))}
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Procedure SignalToHandleErrorAddrFrame_Thumb(Errno : longint;addr : CodePointer; frame : Pointer); nostackframe; assembler;
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asm
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.thumb_func
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.code 16
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// the address is of the faulting instruction, and sigreturn will
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// skip it -> start with a nop
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nop
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push {r0,r1,r2,r3}
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bl GetHandleErrorAddrFrameAddr
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// overwrite last stack slot with new return address
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str r0, [sp,#12]
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// lr := addr
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ldr r0, [sp,#4]
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mov lr, r0
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pop {r0,r1,r2,pc}
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.text
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{$if not(defined(CPUTHUMB)) and not(defined(CPUTHUMB2))}
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.code 32
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{$endif not(defined(CPUTHUMB)) and not(defined(CPUTHUMB2))}
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end;
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{$endif defined(CPU_HAS_THUMB))}
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{$endif FPC_FULLVERSION >= 30200}
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procedure SignalToRunerror(Sig: longint; { _a2,_a3,_a4 : dword; } SigContext: PSigInfo; uContext : PuContext); 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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{ don't know how to find the different causes, maybe via xer? }
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res := 207;
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SysResetFPU;
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end;
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SIGILL:
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{$ifdef FPC_SYSTEM_FPC_MOVE}
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if in_edsp_test then
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begin
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res:=0;
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cpu_has_edsp:=false;
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inc(uContext^.uc_mcontext.arm_pc,4);
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end
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else
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{$endif FPC_SYSTEM_FPC_MOVE}
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res:=216;
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SIGSEGV :
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res:=216;
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SIGBUS:
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res:=214;
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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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{ 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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ucontext^.uc_mcontext.arm_r0:=res;
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ucontext^.uc_mcontext.arm_r1:=uContext^.uc_mcontext.arm_pc;
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ucontext^.uc_mcontext.arm_r2:=uContext^.uc_mcontext.arm_fp;
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{$if FPC_FULLVERSION >= 30200}
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{$if not(defined(CPUTHUMB)) and not(defined(CPUTHUMB2))}
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if (ucontext^.uc_mcontext.arm_cpsr and (1 shl 5))=0 then
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begin
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ucontext^.uc_mcontext.arm_pc:=ptruint(@SignalToHandleErrorAddrFrame_ARM);
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end
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else
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{$endif not(defined(CPUTHUMB)) and not(defined(CPUTHUMB2))}
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begin
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{$if defined(CPU_HAS_THUMB))}
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ucontext^.uc_mcontext.arm_pc:=ptruint(@SignalToHandleErrorAddrFrame_Thumb);
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{$else defined(CPU_HAS_THUMB))}
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halt(217);
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{$endif defined(CPU_HAS_THUMB))}
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end;
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{$else}
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ucontext^.uc_mcontext.arm_pc:=ptruint(@SignalToHandleErrorAddrFrame_ARM);
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{$endif}
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end;
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end;
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