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292 lines
10 KiB
C
292 lines
10 KiB
C
/*
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* ARM signal handling routines
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*
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* Copyright 2002 Marcus Meissner, SuSE Linux AG
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* Copyright 2010-2013, 2015 André Hentschel
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library 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. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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#ifdef __arm__
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#include <stdlib.h>
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#include <stdarg.h>
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#define NONAMELESSUNION
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#define NONAMELESSSTRUCT
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#include "ntstatus.h"
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#define WIN32_NO_STATUS
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#include "windef.h"
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#include "winternl.h"
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#include "wine/exception.h"
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#include "ntdll_misc.h"
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#include "wine/debug.h"
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#include "winnt.h"
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WINE_DEFAULT_DEBUG_CHANNEL(seh);
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/*******************************************************************
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* is_valid_frame
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*/
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static inline BOOL is_valid_frame( void *frame )
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{
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if ((ULONG_PTR)frame & 3) return FALSE;
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return (frame >= NtCurrentTeb()->Tib.StackLimit &&
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(void **)frame < (void **)NtCurrentTeb()->Tib.StackBase - 1);
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}
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/**************************************************************************
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* __chkstk (NTDLL.@)
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*
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* Incoming r4 contains words to allocate, converting to bytes then return
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*/
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__ASM_GLOBAL_FUNC( __chkstk, "lsl r4, r4, #2\n\t"
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"bx lr" )
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/***********************************************************************
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* RtlCaptureContext (NTDLL.@)
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*/
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__ASM_STDCALL_FUNC( RtlCaptureContext, 4,
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".arm\n\t"
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"stmib r0, {r0-r12}\n\t" /* context->R0..R12 */
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"mov r1, #0x0200000\n\t" /* CONTEXT_ARM */
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"add r1, r1, #0x3\n\t" /* CONTEXT_FULL */
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"str r1, [r0]\n\t" /* context->ContextFlags */
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"str SP, [r0, #0x38]\n\t" /* context->Sp */
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"str LR, [r0, #0x3c]\n\t" /* context->Lr */
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"str LR, [r0, #0x40]\n\t" /* context->Pc */
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"mrs r1, CPSR\n\t"
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"str r1, [r0, #0x44]\n\t" /* context->Cpsr */
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"bx lr"
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)
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/**********************************************************************
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* call_stack_handlers
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*
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* Call the stack handlers chain.
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*/
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static NTSTATUS call_stack_handlers( EXCEPTION_RECORD *rec, CONTEXT *context )
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{
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EXCEPTION_REGISTRATION_RECORD *frame, *dispatch, *nested_frame;
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DWORD res;
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frame = NtCurrentTeb()->Tib.ExceptionList;
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nested_frame = NULL;
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while (frame != (EXCEPTION_REGISTRATION_RECORD*)~0UL)
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{
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/* Check frame address */
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if (!is_valid_frame( frame ))
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{
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rec->ExceptionFlags |= EH_STACK_INVALID;
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break;
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}
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/* Call handler */
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TRACE( "calling handler at %p code=%x flags=%x\n",
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frame->Handler, rec->ExceptionCode, rec->ExceptionFlags );
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res = frame->Handler( rec, frame, context, &dispatch );
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TRACE( "handler at %p returned %x\n", frame->Handler, res );
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if (frame == nested_frame)
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{
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/* no longer nested */
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nested_frame = NULL;
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rec->ExceptionFlags &= ~EH_NESTED_CALL;
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}
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switch(res)
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{
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case ExceptionContinueExecution:
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if (!(rec->ExceptionFlags & EH_NONCONTINUABLE)) return STATUS_SUCCESS;
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return STATUS_NONCONTINUABLE_EXCEPTION;
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case ExceptionContinueSearch:
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break;
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case ExceptionNestedException:
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if (nested_frame < dispatch) nested_frame = dispatch;
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rec->ExceptionFlags |= EH_NESTED_CALL;
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break;
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default:
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return STATUS_INVALID_DISPOSITION;
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}
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frame = frame->Prev;
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}
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return STATUS_UNHANDLED_EXCEPTION;
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}
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/*******************************************************************
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* KiUserExceptionDispatcher (NTDLL.@)
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*/
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NTSTATUS WINAPI KiUserExceptionDispatcher( EXCEPTION_RECORD *rec, CONTEXT *context )
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{
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NTSTATUS status;
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DWORD c;
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TRACE( "code=%x flags=%x addr=%p pc=%08x tid=%04x\n",
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rec->ExceptionCode, rec->ExceptionFlags, rec->ExceptionAddress,
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context->Pc, GetCurrentThreadId() );
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for (c = 0; c < rec->NumberParameters; c++)
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TRACE( " info[%d]=%08lx\n", c, rec->ExceptionInformation[c] );
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if (rec->ExceptionCode == EXCEPTION_WINE_STUB)
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{
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if (rec->ExceptionInformation[1] >> 16)
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MESSAGE( "wine: Call from %p to unimplemented function %s.%s, aborting\n",
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rec->ExceptionAddress,
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(char*)rec->ExceptionInformation[0], (char*)rec->ExceptionInformation[1] );
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else
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MESSAGE( "wine: Call from %p to unimplemented function %s.%ld, aborting\n",
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rec->ExceptionAddress,
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(char*)rec->ExceptionInformation[0], rec->ExceptionInformation[1] );
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}
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else
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{
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TRACE( " r0=%08x r1=%08x r2=%08x r3=%08x r4=%08x r5=%08x\n",
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context->R0, context->R1, context->R2, context->R3, context->R4, context->R5 );
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TRACE( " r6=%08x r7=%08x r8=%08x r9=%08x r10=%08x r11=%08x\n",
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context->R6, context->R7, context->R8, context->R9, context->R10, context->R11 );
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TRACE( " r12=%08x sp=%08x lr=%08x pc=%08x cpsr=%08x\n",
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context->R12, context->Sp, context->Lr, context->Pc, context->Cpsr );
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}
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if (call_vectored_handlers( rec, context ) == EXCEPTION_CONTINUE_EXECUTION)
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NtContinue( context, FALSE );
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if ((status = call_stack_handlers( rec, context )) == STATUS_SUCCESS)
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NtContinue( context, FALSE );
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if (status != STATUS_UNHANDLED_EXCEPTION) RtlRaiseStatus( status );
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return NtRaiseException( rec, context, FALSE );
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}
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/***********************************************************************
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* RtlUnwind (NTDLL.@)
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*/
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void WINAPI RtlUnwind( void *endframe, void *target_ip, EXCEPTION_RECORD *rec, void *retval )
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{
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CONTEXT context;
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EXCEPTION_RECORD record;
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EXCEPTION_REGISTRATION_RECORD *frame, *dispatch;
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DWORD res;
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RtlCaptureContext( &context );
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context.R0 = (DWORD)retval;
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/* build an exception record, if we do not have one */
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if (!rec)
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{
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record.ExceptionCode = STATUS_UNWIND;
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record.ExceptionFlags = 0;
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record.ExceptionRecord = NULL;
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record.ExceptionAddress = (void *)context.Pc;
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record.NumberParameters = 0;
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rec = &record;
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}
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rec->ExceptionFlags |= EH_UNWINDING | (endframe ? 0 : EH_EXIT_UNWIND);
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TRACE( "code=%x flags=%x\n", rec->ExceptionCode, rec->ExceptionFlags );
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/* get chain of exception frames */
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frame = NtCurrentTeb()->Tib.ExceptionList;
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while ((frame != (EXCEPTION_REGISTRATION_RECORD*)~0UL) && (frame != endframe))
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{
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/* Check frame address */
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if (endframe && ((void*)frame > endframe))
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raise_status( STATUS_INVALID_UNWIND_TARGET, rec );
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if (!is_valid_frame( frame )) raise_status( STATUS_BAD_STACK, rec );
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/* Call handler */
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TRACE( "calling handler at %p code=%x flags=%x\n",
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frame->Handler, rec->ExceptionCode, rec->ExceptionFlags );
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res = frame->Handler(rec, frame, &context, &dispatch);
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TRACE( "handler at %p returned %x\n", frame->Handler, res );
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switch(res)
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{
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case ExceptionContinueSearch:
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break;
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case ExceptionCollidedUnwind:
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frame = dispatch;
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break;
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default:
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raise_status( STATUS_INVALID_DISPOSITION, rec );
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break;
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}
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frame = __wine_pop_frame( frame );
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}
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}
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/***********************************************************************
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* RtlRaiseException (NTDLL.@)
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*/
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__ASM_STDCALL_FUNC( RtlRaiseException, 4,
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"push {r0, lr}\n\t"
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"sub sp, sp, #0x1a0\n\t" /* sizeof(CONTEXT) */
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"mov r0, sp\n\t" /* context */
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"bl " __ASM_NAME("RtlCaptureContext") "\n\t"
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"ldr r0, [sp, #0x1a0]\n\t" /* rec */
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"ldr r1, [sp, #0x1a4]\n\t"
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"str r1, [sp, #0x40]\n\t" /* context->Pc */
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"str r1, [r0, #12]\n\t" /* rec->ExceptionAddress */
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"add r1, sp, #0x1a8\n\t"
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"str r1, [sp, #0x38]\n\t" /* context->Sp */
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"mov r1, sp\n\t"
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"mov r2, #1\n\t"
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"bl " __ASM_NAME("NtRaiseException") "\n\t"
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"bl " __ASM_NAME("RtlRaiseStatus") )
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/*************************************************************************
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* RtlCaptureStackBackTrace (NTDLL.@)
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*/
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USHORT WINAPI RtlCaptureStackBackTrace( ULONG skip, ULONG count, PVOID *buffer, ULONG *hash )
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{
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FIXME( "(%d, %d, %p, %p) stub!\n", skip, count, buffer, hash );
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return 0;
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}
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/***********************************************************************
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* signal_start_thread
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*/
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__ASM_GLOBAL_FUNC( signal_start_thread,
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"mov sp, r0\n\t" /* context */
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"mov r1, #1\n\t"
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"b " __ASM_NAME("NtContinue") )
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/**********************************************************************
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* DbgBreakPoint (NTDLL.@)
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*/
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__ASM_STDCALL_FUNC( DbgBreakPoint, 0, "bkpt #0; bx lr; nop; nop; nop; nop" );
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/**********************************************************************
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* DbgUserBreakPoint (NTDLL.@)
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*/
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__ASM_STDCALL_FUNC( DbgUserBreakPoint, 0, "bkpt #0; bx lr; nop; nop; nop; nop" );
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/**********************************************************************
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* NtCurrentTeb (NTDLL.@)
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*/
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TEB * WINAPI NtCurrentTeb(void)
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{
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return unix_funcs->NtCurrentTeb();
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}
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#endif /* __arm__ */
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