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wine/dlls/ntdll/signal_arm.c

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/*
* ARM signal handling routines
*
* Copyright 2002 Marcus Meissner, SuSE Linux AG
* Copyright 2010-2013, 2015 André Hentschel
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
#ifdef __arm__
#include <stdlib.h>
#include <stdarg.h>
#define NONAMELESSUNION
#define NONAMELESSSTRUCT
#include "ntstatus.h"
#define WIN32_NO_STATUS
#include "windef.h"
#include "winternl.h"
#include "wine/exception.h"
#include "ntdll_misc.h"
#include "wine/debug.h"
#include "winnt.h"
WINE_DEFAULT_DEBUG_CHANNEL(seh);
WINE_DECLARE_DEBUG_CHANNEL(threadname);
typedef struct _SCOPE_TABLE
{
ULONG Count;
struct
{
ULONG BeginAddress;
ULONG EndAddress;
ULONG HandlerAddress;
ULONG JumpTarget;
} ScopeRecord[1];
} SCOPE_TABLE, *PSCOPE_TABLE;
/* layering violation: the setjmp buffer is defined in msvcrt, but used by RtlUnwindEx */
struct MSVCRT_JUMP_BUFFER
{
unsigned long Frame;
unsigned long R4;
unsigned long R5;
unsigned long R6;
unsigned long R7;
unsigned long R8;
unsigned long R9;
unsigned long R10;
unsigned long R11;
unsigned long Sp;
unsigned long Pc;
unsigned long Fpscr;
unsigned long long D[8];
};
static void dump_scope_table( ULONG base, const SCOPE_TABLE *table )
{
unsigned int i;
TRACE( "scope table at %p\n", table );
for (i = 0; i < table->Count; i++)
TRACE( " %u: %lx-%lx handler %lx target %lx\n", i,
base + table->ScopeRecord[i].BeginAddress,
base + table->ScopeRecord[i].EndAddress,
base + table->ScopeRecord[i].HandlerAddress,
base + table->ScopeRecord[i].JumpTarget );
}
/*******************************************************************
* is_valid_frame
*/
static inline BOOL is_valid_frame( ULONG_PTR frame )
{
if (frame & 3) return FALSE;
return ((void *)frame >= NtCurrentTeb()->Tib.StackLimit &&
(void *)frame <= NtCurrentTeb()->Tib.StackBase);
}
/**************************************************************************
* __chkstk (NTDLL.@)
*
* Incoming r4 contains words to allocate, converting to bytes then return
*/
__ASM_GLOBAL_FUNC( __chkstk, "lsl r4, r4, #2\n\t"
"bx lr" )
/***********************************************************************
* RtlCaptureContext (NTDLL.@)
*/
__ASM_STDCALL_FUNC( RtlCaptureContext, 4,
"str r1, [r0, #0x8]\n\t" /* context->R1 */
"mov r1, #0x0200000\n\t" /* CONTEXT_ARM */
"add r1, r1, #0x7\n\t" /* CONTEXT_CONTROL|CONTEXT_INTEGER|CONTEXT_FLOATING_POINT */
"str r1, [r0]\n\t" /* context->ContextFlags */
"str SP, [r0, #0x38]\n\t" /* context->Sp */
"str LR, [r0, #0x40]\n\t" /* context->Pc */
"mrs r1, CPSR\n\t"
"bfi r1, lr, #5, #1\n\t" /* Thumb bit */
"str r1, [r0, #0x44]\n\t" /* context->Cpsr */
"mov r1, #0\n\t"
"str r1, [r0, #0x4]\n\t" /* context->R0 */
"str r1, [r0, #0x3c]\n\t" /* context->Lr */
"add r0, #0x0c\n\t"
"stm r0, {r2-r12}\n\t" /* context->R2..R12 */
#ifndef __SOFTFP__
"add r0, #0x44\n\t" /* 0x50 - 0x0c */
"vstm r0, {d0-d15}\n\t" /* context->D0-D15 */
#endif
"bx lr" )
/**********************************************************************
* virtual_unwind
*/
static NTSTATUS virtual_unwind( ULONG type, DISPATCHER_CONTEXT *dispatch, CONTEXT *context )
{
LDR_DATA_TABLE_ENTRY *module;
NTSTATUS status;
DWORD pc;
dispatch->ImageBase = 0;
dispatch->ScopeIndex = 0;
dispatch->EstablisherFrame = 0;
dispatch->ControlPc = context->Pc;
/*
* TODO: CONTEXT_UNWOUND_TO_CALL should be cleared if unwound past a
* signal frame.
*/
dispatch->ControlPcIsUnwound = (context->ContextFlags & CONTEXT_UNWOUND_TO_CALL) != 0;
pc = context->Pc - (dispatch->ControlPcIsUnwound ? 2 : 0);
/* first look for PE exception information */
if ((dispatch->FunctionEntry = lookup_function_info(pc,
(ULONG_PTR*)&dispatch->ImageBase, &module )))
{
dispatch->LanguageHandler = RtlVirtualUnwind( type, dispatch->ImageBase, pc,
dispatch->FunctionEntry, context,
&dispatch->HandlerData, (ULONG_PTR *)&dispatch->EstablisherFrame,
NULL );
return STATUS_SUCCESS;
}
/* then look for host system exception information */
if (!module || (module->Flags & LDR_WINE_INTERNAL))
{
status = unix_funcs->unwind_builtin_dll( type, dispatch, context );
if (status != STATUS_SUCCESS) return status;
if (dispatch->EstablisherFrame)
{
dispatch->FunctionEntry = NULL;
if (dispatch->LanguageHandler && !module)
{
FIXME( "calling personality routine in system library not supported yet\n" );
dispatch->LanguageHandler = NULL;
}
return STATUS_SUCCESS;
}
}
else
{
status = context->Pc != context->Lr ?
STATUS_SUCCESS : STATUS_INVALID_DISPOSITION;
WARN( "exception data not found in %s for %p, LR %p, status %x\n",
debugstr_w(module->BaseDllName.Buffer), (void*) context->Pc,
(void*) context->Lr, status );
dispatch->EstablisherFrame = context->Sp;
dispatch->LanguageHandler = NULL;
context->Pc = context->Lr;
context->ContextFlags |= CONTEXT_UNWOUND_TO_CALL;
return status;
}
dispatch->EstablisherFrame = context->Sp;
dispatch->LanguageHandler = NULL;
context->Pc = context->Lr;
context->ContextFlags |= CONTEXT_UNWOUND_TO_CALL;
return STATUS_SUCCESS;
}
struct unwind_exception_frame
{
EXCEPTION_REGISTRATION_RECORD frame;
DISPATCHER_CONTEXT *dispatch;
};
/**********************************************************************
* unwind_exception_handler
*
* Handler for exceptions happening while calling an unwind handler.
*/
static DWORD __cdecl unwind_exception_handler( EXCEPTION_RECORD *rec, EXCEPTION_REGISTRATION_RECORD *frame,
CONTEXT *context, EXCEPTION_REGISTRATION_RECORD **dispatcher )
{
struct unwind_exception_frame *unwind_frame = (struct unwind_exception_frame *)frame;
DISPATCHER_CONTEXT *dispatch = (DISPATCHER_CONTEXT *)dispatcher;
/* copy the original dispatcher into the current one, except for the TargetIp */
dispatch->ControlPc = unwind_frame->dispatch->ControlPc;
dispatch->ImageBase = unwind_frame->dispatch->ImageBase;
dispatch->FunctionEntry = unwind_frame->dispatch->FunctionEntry;
dispatch->EstablisherFrame = unwind_frame->dispatch->EstablisherFrame;
dispatch->ContextRecord = unwind_frame->dispatch->ContextRecord;
dispatch->LanguageHandler = unwind_frame->dispatch->LanguageHandler;
dispatch->HandlerData = unwind_frame->dispatch->HandlerData;
dispatch->HistoryTable = unwind_frame->dispatch->HistoryTable;
dispatch->ScopeIndex = unwind_frame->dispatch->ScopeIndex;
TRACE( "detected collided unwind\n" );
return ExceptionCollidedUnwind;
}
/**********************************************************************
* call_unwind_handler
*
* Call a single unwind handler.
*/
static DWORD call_unwind_handler( EXCEPTION_RECORD *rec, DISPATCHER_CONTEXT *dispatch )
{
struct unwind_exception_frame frame;
DWORD res;
frame.frame.Handler = unwind_exception_handler;
frame.dispatch = dispatch;
__wine_push_frame( &frame.frame );
TRACE( "calling handler %p (rec=%p, frame=0x%x context=%p, dispatch=%p)\n",
dispatch->LanguageHandler, rec, dispatch->EstablisherFrame, dispatch->ContextRecord, dispatch );
res = dispatch->LanguageHandler( rec, (void *)dispatch->EstablisherFrame, dispatch->ContextRecord, dispatch );
TRACE( "handler %p returned %x\n", dispatch->LanguageHandler, res );
__wine_pop_frame( &frame.frame );
switch (res)
{
case ExceptionContinueSearch:
case ExceptionCollidedUnwind:
break;
default:
raise_status( STATUS_INVALID_DISPOSITION, rec );
break;
}
return res;
}
/**********************************************************************
* call_teb_unwind_handler
*
* Call a single unwind handler from the TEB chain.
*/
static DWORD call_teb_unwind_handler( EXCEPTION_RECORD *rec, DISPATCHER_CONTEXT *dispatch,
EXCEPTION_REGISTRATION_RECORD *teb_frame )
{
DWORD res;
TRACE( "calling TEB handler %p (rec=%p, frame=%p context=%p, dispatch=%p)\n",
teb_frame->Handler, rec, teb_frame, dispatch->ContextRecord, dispatch );
res = teb_frame->Handler( rec, teb_frame, dispatch->ContextRecord, (EXCEPTION_REGISTRATION_RECORD**)dispatch );
TRACE( "handler at %p returned %u\n", teb_frame->Handler, res );
switch (res)
{
case ExceptionContinueSearch:
case ExceptionCollidedUnwind:
break;
default:
raise_status( STATUS_INVALID_DISPOSITION, rec );
break;
}
return res;
}
static DWORD __cdecl nested_exception_handler( EXCEPTION_RECORD *rec, EXCEPTION_REGISTRATION_RECORD *frame,
CONTEXT *context, EXCEPTION_REGISTRATION_RECORD **dispatcher )
{
if (!(rec->ExceptionFlags & (EH_UNWINDING | EH_EXIT_UNWIND)))
rec->ExceptionFlags |= EH_NESTED_CALL;
return ExceptionContinueSearch;
}
/**********************************************************************
* call_handler
*
* Call a single exception handler.
* FIXME: Handle nested exceptions.
*/
static DWORD call_handler( EXCEPTION_RECORD *rec, CONTEXT *context, DISPATCHER_CONTEXT *dispatch )
{
EXCEPTION_REGISTRATION_RECORD frame;
DWORD res;
frame.Handler = nested_exception_handler;
__wine_push_frame( &frame );
TRACE( "calling handler %p (rec=%p, frame=0x%x context=%p, dispatch=%p)\n",
dispatch->LanguageHandler, rec, dispatch->EstablisherFrame, dispatch->ContextRecord, dispatch );
res = dispatch->LanguageHandler( rec, (void *)dispatch->EstablisherFrame, context, dispatch );
TRACE( "handler at %p returned %u\n", dispatch->LanguageHandler, res );
rec->ExceptionFlags &= EH_NONCONTINUABLE;
__wine_pop_frame( &frame );
return res;
}
/**********************************************************************
* call_teb_handler
*
* Call a single exception handler from the TEB chain.
* FIXME: Handle nested exceptions.
*/
static DWORD call_teb_handler( EXCEPTION_RECORD *rec, CONTEXT *context, DISPATCHER_CONTEXT *dispatch,
EXCEPTION_REGISTRATION_RECORD *teb_frame )
{
DWORD res;
TRACE( "calling TEB handler %p (rec=%p, frame=%p context=%p, dispatch=%p)\n",
teb_frame->Handler, rec, teb_frame, dispatch->ContextRecord, dispatch );
res = teb_frame->Handler( rec, teb_frame, context, (EXCEPTION_REGISTRATION_RECORD**)dispatch );
TRACE( "handler at %p returned %u\n", teb_frame->Handler, res );
return res;
}
/**********************************************************************
* call_function_handlers
*
* Call the per-function handlers.
*/
static NTSTATUS call_function_handlers( EXCEPTION_RECORD *rec, CONTEXT *orig_context )
{
EXCEPTION_REGISTRATION_RECORD *teb_frame = NtCurrentTeb()->Tib.ExceptionList;
UNWIND_HISTORY_TABLE table;
DISPATCHER_CONTEXT dispatch;
CONTEXT context, prev_context;
NTSTATUS status;
context = *orig_context;
dispatch.TargetPc = 0;
dispatch.ContextRecord = &context;
dispatch.HistoryTable = &table;
prev_context = context;
dispatch.NonVolatileRegisters = (BYTE *)&prev_context.R4;
for (;;)
{
status = virtual_unwind( UNW_FLAG_EHANDLER, &dispatch, &context );
if (status != STATUS_SUCCESS) return status;
unwind_done:
if (!dispatch.EstablisherFrame) break;
if (!is_valid_frame( dispatch.EstablisherFrame ))
{
ERR( "invalid frame %x (%p-%p)\n", dispatch.EstablisherFrame,
NtCurrentTeb()->Tib.StackLimit, NtCurrentTeb()->Tib.StackBase );
rec->ExceptionFlags |= EH_STACK_INVALID;
break;
}
if (dispatch.LanguageHandler)
{
switch (call_handler( rec, orig_context, &dispatch ))
{
case ExceptionContinueExecution:
if (rec->ExceptionFlags & EH_NONCONTINUABLE) return STATUS_NONCONTINUABLE_EXCEPTION;
return STATUS_SUCCESS;
case ExceptionContinueSearch:
break;
case ExceptionNestedException:
FIXME( "nested exception\n" );
break;
case ExceptionCollidedUnwind: {
ULONG_PTR frame;
context = *dispatch.ContextRecord;
dispatch.ContextRecord = &context;
RtlVirtualUnwind( UNW_FLAG_NHANDLER, dispatch.ImageBase,
dispatch.ControlPc, dispatch.FunctionEntry,
&context, (PVOID *)&dispatch.HandlerData, &frame, NULL );
goto unwind_done;
}
default:
return STATUS_INVALID_DISPOSITION;
}
}
/* hack: call wine handlers registered in the tib list */
else while ((DWORD)teb_frame < context.Sp)
{
TRACE( "found wine frame %p rsp %x handler %p\n",
teb_frame, context.Sp, teb_frame->Handler );
dispatch.EstablisherFrame = (DWORD)teb_frame;
switch (call_teb_handler( rec, orig_context, &dispatch, teb_frame ))
{
case ExceptionContinueExecution:
if (rec->ExceptionFlags & EH_NONCONTINUABLE) return STATUS_NONCONTINUABLE_EXCEPTION;
return STATUS_SUCCESS;
case ExceptionContinueSearch:
break;
case ExceptionNestedException:
FIXME( "nested exception\n" );
break;
case ExceptionCollidedUnwind: {
ULONG_PTR frame;
context = *dispatch.ContextRecord;
dispatch.ContextRecord = &context;
RtlVirtualUnwind( UNW_FLAG_NHANDLER, dispatch.ImageBase,
dispatch.ControlPc, dispatch.FunctionEntry,
&context, (PVOID *)&dispatch.HandlerData, &frame, NULL );
teb_frame = teb_frame->Prev;
goto unwind_done;
}
default:
return STATUS_INVALID_DISPOSITION;
}
teb_frame = teb_frame->Prev;
}
if (context.Sp == (DWORD)NtCurrentTeb()->Tib.StackBase) break;
prev_context = context;
}
return STATUS_UNHANDLED_EXCEPTION;
}
/*******************************************************************
* KiUserExceptionDispatcher (NTDLL.@)
*/
NTSTATUS WINAPI KiUserExceptionDispatcher( EXCEPTION_RECORD *rec, CONTEXT *context )
{
NTSTATUS status;
DWORD c;
TRACE( "code=%x flags=%x addr=%p pc=%08x tid=%04x\n",
rec->ExceptionCode, rec->ExceptionFlags, rec->ExceptionAddress,
context->Pc, GetCurrentThreadId() );
for (c = 0; c < rec->NumberParameters; c++)
TRACE( " info[%d]=%08lx\n", c, rec->ExceptionInformation[c] );
if (rec->ExceptionCode == EXCEPTION_WINE_STUB)
{
if (rec->ExceptionInformation[1] >> 16)
MESSAGE( "wine: Call from %p to unimplemented function %s.%s, aborting\n",
rec->ExceptionAddress,
(char*)rec->ExceptionInformation[0], (char*)rec->ExceptionInformation[1] );
else
MESSAGE( "wine: Call from %p to unimplemented function %s.%ld, aborting\n",
rec->ExceptionAddress,
(char*)rec->ExceptionInformation[0], rec->ExceptionInformation[1] );
}
else if (rec->ExceptionCode == EXCEPTION_WINE_NAME_THREAD && rec->ExceptionInformation[0] == 0x1000)
{
if ((DWORD)rec->ExceptionInformation[2] == -1)
WARN_(threadname)( "Thread renamed to %s\n", debugstr_a((char *)rec->ExceptionInformation[1]) );
else
WARN_(threadname)( "Thread ID %04x renamed to %s\n", (DWORD)rec->ExceptionInformation[2],
debugstr_a((char *)rec->ExceptionInformation[1]) );
}
else if (rec->ExceptionCode == DBG_PRINTEXCEPTION_C)
{
WARN( "%s\n", debugstr_an((char *)rec->ExceptionInformation[1], rec->ExceptionInformation[0] - 1) );
}
else if (rec->ExceptionCode == DBG_PRINTEXCEPTION_WIDE_C)
{
WARN( "%s\n", debugstr_wn((WCHAR *)rec->ExceptionInformation[1], rec->ExceptionInformation[0] - 1) );
}
else
{
if (rec->ExceptionCode == STATUS_ASSERTION_FAILURE)
ERR( "%s exception (code=%x) raised\n", debugstr_exception_code(rec->ExceptionCode), rec->ExceptionCode );
else
WARN( "%s exception (code=%x) raised\n", debugstr_exception_code(rec->ExceptionCode), rec->ExceptionCode );
TRACE( " r0=%08x r1=%08x r2=%08x r3=%08x r4=%08x r5=%08x\n",
context->R0, context->R1, context->R2, context->R3, context->R4, context->R5 );
TRACE( " r6=%08x r7=%08x r8=%08x r9=%08x r10=%08x r11=%08x\n",
context->R6, context->R7, context->R8, context->R9, context->R10, context->R11 );
TRACE( " r12=%08x sp=%08x lr=%08x pc=%08x cpsr=%08x\n",
context->R12, context->Sp, context->Lr, context->Pc, context->Cpsr );
}
if (call_vectored_handlers( rec, context ) == EXCEPTION_CONTINUE_EXECUTION)
NtContinue( context, FALSE );
if ((status = call_function_handlers( rec, context )) == STATUS_SUCCESS)
NtContinue( context, FALSE );
if (status != STATUS_UNHANDLED_EXCEPTION) RtlRaiseStatus( status );
return NtRaiseException( rec, context, FALSE );
}
/*******************************************************************
* KiUserApcDispatcher (NTDLL.@)
*/
void WINAPI KiUserApcDispatcher( CONTEXT *context, ULONG_PTR ctx, ULONG_PTR arg1, ULONG_PTR arg2,
PNTAPCFUNC func )
{
func( ctx, arg1, arg2 );
NtContinue( context, TRUE );
}
/*******************************************************************
* KiUserCallbackDispatcher (NTDLL.@)
*/
void WINAPI KiUserCallbackDispatcher( ULONG id, void *args, ULONG len )
{
NTSTATUS status;
__TRY
{
NTSTATUS (WINAPI *func)(void *, ULONG) = ((void **)NtCurrentTeb()->Peb->KernelCallbackTable)[id];
status = NtCallbackReturn( NULL, 0, func( args, len ));
}
__EXCEPT_ALL
{
ERR_(seh)( "ignoring exception\n" );
status = NtCallbackReturn( 0, 0, 0 );
}
__ENDTRY
RtlRaiseStatus( status );
}
/***********************************************************************
* Definitions for Win32 unwind tables
*/
struct unwind_info
{
DWORD function_length : 18;
DWORD version : 2;
DWORD x : 1;
DWORD e : 1;
DWORD f : 1;
DWORD epilog : 5;
DWORD codes : 4;
};
struct unwind_info_ext
{
WORD epilog;
BYTE codes;
BYTE reserved;
};
struct unwind_info_epilog
{
DWORD offset : 18;
DWORD res : 2;
DWORD cond : 4;
DWORD index : 8;
};
static const BYTE unwind_code_len[256] =
{
/* 00 */ 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
/* 20 */ 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
/* 40 */ 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
/* 60 */ 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
/* 80 */ 2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,
/* a0 */ 2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,
/* c0 */ 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
/* e0 */ 1,1,1,1,1,1,1,1,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,3,4,3,4,1,1,1,1,1
};
static const BYTE unwind_instr_len[256] =
{
/* 00 */ 2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,
/* 20 */ 2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,
/* 40 */ 2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,
/* 60 */ 2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,
/* 80 */ 4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,
/* a0 */ 4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,
/* c0 */ 2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,4,4,4,4,4,4,4,4,
/* e0 */ 4,4,4,4,4,4,4,4,4,4,4,4,2,2,2,4,0,0,0,0,0,4,4,2,2,4,4,2,4,2,4,0
};
/***********************************************************************
* get_sequence_len
*/
static unsigned int get_sequence_len( BYTE *ptr, BYTE *end, int include_end )
{
unsigned int ret = 0;
while (ptr < end)
{
if (*ptr >= 0xfd)
{
if (*ptr <= 0xfe && include_end)
ret += unwind_instr_len[*ptr];
break;
}
ret += unwind_instr_len[*ptr];
ptr += unwind_code_len[*ptr];
}
return ret;
}
/***********************************************************************
* pop_regs_mask
*/
static void pop_regs_mask( int mask, CONTEXT *context,
KNONVOLATILE_CONTEXT_POINTERS *ptrs )
{
int i;
for (i = 0; i <= 12; i++)
{
if (!(mask & (1 << i))) continue;
if (ptrs && i >= 4 && i <= 11) (&ptrs->R4)[i - 4] = (DWORD *)context->Sp;
if (i >= 4) (&context->R0)[i] = *(DWORD *)context->Sp;
context->Sp += 4;
}
}
/***********************************************************************
* pop_regs_range
*/
static void pop_regs_range( int last, CONTEXT *context,
KNONVOLATILE_CONTEXT_POINTERS *ptrs )
{
int i;
for (i = 4; i <= last; i++)
{
if (ptrs) (&ptrs->R4)[i - 4] = (DWORD *)context->Sp;
(&context->R0)[i] = *(DWORD *)context->Sp;
context->Sp += 4;
}
}
/***********************************************************************
* pop_lr
*/
static void pop_lr( int increment, CONTEXT *context,
KNONVOLATILE_CONTEXT_POINTERS *ptrs )
{
if (ptrs) ptrs->Lr = (DWORD *)context->Sp;
context->Lr = *(DWORD *)context->Sp;
context->Sp += increment;
}
/***********************************************************************
* pop_fpregs_range
*/
static void pop_fpregs_range( int first, int last, CONTEXT *context,
KNONVOLATILE_CONTEXT_POINTERS *ptrs )
{
int i;
for (i = first; i <= last; i++)
{
if (ptrs && i >= 8 && i <= 15) (&ptrs->D8)[i - 8] = (ULONGLONG *)context->Sp;
context->u.D[i] = *(ULONGLONG *)context->Sp;
context->Sp += 8;
}
}
/***********************************************************************
* process_unwind_codes
*/
static void process_unwind_codes( BYTE *ptr, BYTE *end, CONTEXT *context,
KNONVOLATILE_CONTEXT_POINTERS *ptrs, int skip )
{
unsigned int val, len;
unsigned int i;
/* skip codes */
while (ptr < end && skip)
{
if (*ptr >= 0xfd) break;
skip -= unwind_instr_len[*ptr];
ptr += unwind_code_len[*ptr];
}
while (ptr < end)
{
len = unwind_code_len[*ptr];
if (ptr + len > end) break;
val = 0;
for (i = 0; i < len; i++)
val = (val << 8) | ptr[i];
if (*ptr <= 0x7f) /* add sp, sp, #x */
context->Sp += 4 * (val & 0x7f);
else if (*ptr <= 0xbf) /* pop {r0-r12,lr} */
{
pop_regs_mask( val & 0x1fff, context, ptrs );
if (val & 0x2000)
pop_lr( 4, context, ptrs );
}
else if (*ptr <= 0xcf) /* mov sp, rX */
context->Sp = (&context->R0)[val & 0x0f];
else if (*ptr <= 0xd7) /* pop {r4-rX,lr} */
{
pop_regs_range( (val & 0x03) + 4, context, ptrs );
if (val & 0x04)
pop_lr( 4, context, ptrs );
}
else if (*ptr <= 0xdf) /* pop {r4-rX,lr} */
{
pop_regs_range( (val & 0x03) + 8, context, ptrs );
if (val & 0x04)
pop_lr( 4, context, ptrs );
}
else if (*ptr <= 0xe7) /* vpop {d8-dX} */
pop_fpregs_range( 8, (val & 0x07) + 8, context, ptrs );
else if (*ptr <= 0xeb) /* add sp, sp, #x */
context->Sp += 4 * (val & 0x3ff);
else if (*ptr <= 0xed) /* pop {r0-r12,lr} */
{
pop_regs_mask( val & 0xff, context, ptrs );
if (val & 0x100)
pop_lr( 4, context, ptrs );
}
else if (*ptr <= 0xee) /* Microsoft-specific 0x00-0x0f, Available 0x10-0xff */
WARN( "unsupported code %02x\n", *ptr );
else if (*ptr <= 0xef && ((val & 0xff) <= 0x0f)) /* ldr lr, [sp], #x */
pop_lr( 4 * (val & 0x0f), context, ptrs );
else if (*ptr == 0xf4) /* Custom private (unallocated) opcode, saved a full CONTEXT on the stack */
memcpy( context, (DWORD *)context->Sp, sizeof(CONTEXT) );
else if (*ptr <= 0xf4) /* Available */
WARN( "unsupported code %02x\n", *ptr );
else if (*ptr <= 0xf5) /* vpop {dS-dE} */
pop_fpregs_range( (val & 0xf0) >> 4, (val & 0x0f), context, ptrs );
else if (*ptr <= 0xf6) /* vpop {dS-dE} */
pop_fpregs_range( ((val & 0xf0) >> 4) + 16, (val & 0x0f) + 16, context, ptrs );
else if (*ptr == 0xf7 || *ptr == 0xf9) /* add sp, sp, #x */
context->Sp += 4 * (val & 0xffff);
else if (*ptr == 0xf8 || *ptr == 0xfa) /* add sp, sp, #x */
context->Sp += 4 * (val & 0xffffff);
else if (*ptr <= 0xfc) /* nop */
/* nop */ ;
else /* end */
break;
ptr += len;
}
}
/***********************************************************************
* unwind_packed_data
*/
static void *unwind_packed_data( ULONG_PTR base, ULONG_PTR pc, RUNTIME_FUNCTION *func,
CONTEXT *context, KNONVOLATILE_CONTEXT_POINTERS *ptrs )
{
int i, pos = 0;
int pf = 0, ef = 0, fpoffset = 0, stack = func->u.s.StackAdjust;
int prologue_regmask = 0;
int epilogue_regmask = 0;
unsigned int offset, len;
BYTE prologue[10], *prologue_end, epilogue[20], *epilogue_end;
TRACE( "function %lx-%lx: len=%#x flag=%x ret=%u H=%u reg=%u R=%u L=%u C=%u stackadjust=%x\n",
base + func->BeginAddress, base + func->BeginAddress + func->u.s.FunctionLength * 2,
func->u.s.FunctionLength, func->u.s.Flag, func->u.s.Ret,
func->u.s.H, func->u.s.Reg, func->u.s.R, func->u.s.L, func->u.s.C, func->u.s.StackAdjust );
offset = (pc - base) - func->BeginAddress;
if (func->u.s.StackAdjust >= 0x03f4)
{
pf = func->u.s.StackAdjust & 0x04;
ef = func->u.s.StackAdjust & 0x08;
stack = (func->u.s.StackAdjust & 3) + 1;
}
if (!func->u.s.R || pf)
{
int first = 4, last = func->u.s.Reg + 4;
if (pf)
{
first = (~func->u.s.StackAdjust) & 3;
if (func->u.s.R)
last = 3;
}
for (i = first; i <= last; i++)
prologue_regmask |= 1 << i;
fpoffset = last + 1 - first;
}
if (!func->u.s.R || ef)
{
int first = 4, last = func->u.s.Reg + 4;
if (ef)
{
first = (~func->u.s.StackAdjust) & 3;
if (func->u.s.R)
last = 3;
}
for (i = first; i <= last; i++)
epilogue_regmask |= 1 << i;
}
if (func->u.s.C)
{
prologue_regmask |= 1 << 11;
epilogue_regmask |= 1 << 11;
}
if (func->u.s.L)
{
prologue_regmask |= 1 << 14; /* lr */
if (func->u.s.Ret != 0)
epilogue_regmask |= 1 << 14; /* lr */
else if (!func->u.s.H)
epilogue_regmask |= 1 << 15; /* pc */
}
/* Synthesize prologue opcodes */
if (stack && !pf)
{
if (stack <= 0x7f)
{
prologue[pos++] = stack; /* sub sp, sp, #x */
}
else
{
prologue[pos++] = 0xe8 | (stack >> 8); /* sub.w sp, sp, #x */
prologue[pos++] = stack & 0xff;
}
}
if (func->u.s.R && func->u.s.Reg != 7)
prologue[pos++] = 0xe0 | func->u.s.Reg; /* vpush {d8-dX} */
if (func->u.s.C && fpoffset == 0)
prologue[pos++] = 0xfb; /* mov r11, sp - handled as nop16 */
else if (func->u.s.C)
prologue[pos++] = 0xfc; /* add r11, sp, #x - handled as nop32 */
if (prologue_regmask & 0xf00) /* r8-r11 set */
{
int bitmask = prologue_regmask & 0x1fff;
if (prologue_regmask & (1 << 14)) /* lr */
bitmask |= 0x2000;
prologue[pos++] = 0x80 | (bitmask >> 8); /* push.w {r0-r12,lr} */
prologue[pos++] = bitmask & 0xff;
}
else if (prologue_regmask) /* r0-r7, lr set */
{
int bitmask = prologue_regmask & 0xff;
if (prologue_regmask & (1 << 14)) /* lr */
bitmask |= 0x100;
prologue[pos++] = 0xec | (bitmask >> 8); /* push {r0-r7,lr} */
prologue[pos++] = bitmask & 0xff;
}
if (func->u.s.H)
prologue[pos++] = 0x04; /* push {r0-r3} - handled as sub sp, sp, #16 */
prologue[pos++] = 0xff; /* end */
prologue_end = &prologue[pos];
/* Synthesize epilogue opcodes */
pos = 0;
if (stack && !ef)
{
if (stack <= 0x7f)
{
epilogue[pos++] = stack; /* sub sp, sp, #x */
}
else
{
epilogue[pos++] = 0xe8 | (stack >> 8); /* sub.w sp, sp, #x */
epilogue[pos++] = stack & 0xff;
}
}
if (func->u.s.R && func->u.s.Reg != 7)
epilogue[pos++] = 0xe0 | func->u.s.Reg; /* vpush {d8-dX} */
if (epilogue_regmask & 0x7f00) /* r8-r11, lr set */
{
int bitmask = epilogue_regmask & 0x1fff;
if (epilogue_regmask & (3 << 14)) /* lr or pc */
bitmask |= 0x2000;
epilogue[pos++] = 0x80 | (bitmask >> 8); /* push.w {r0-r12,lr} */
epilogue[pos++] = bitmask & 0xff;
}
else if (epilogue_regmask) /* r0-r7, pc set */
{
int bitmask = epilogue_regmask & 0xff;
if (epilogue_regmask & (1 << 15)) /* pc */
bitmask |= 0x100; /* lr */
epilogue[pos++] = 0xec | (bitmask >> 8); /* push {r0-r7,lr} */
epilogue[pos++] = bitmask & 0xff;
}
if (func->u.s.H && !(func->u.s.L && func->u.s.Ret == 0))
epilogue[pos++] = 0x04; /* add sp, sp, #16 */
else if (func->u.s.H && (func->u.s.L && func->u.s.Ret == 0))
{
epilogue[pos++] = 0xef; /* ldr lr, [sp], #20 */
epilogue[pos++] = 5;
}
if (func->u.s.Ret == 1)
epilogue[pos++] = 0xfd; /* bx lr */
else if (func->u.s.Ret == 2)
epilogue[pos++] = 0xfe; /* b address */
else
epilogue[pos++] = 0xff; /* end */
epilogue_end = &epilogue[pos];
if (func->u.s.Flag == 1 && offset < 4 * (prologue_end - prologue)) {
/* Check prologue */
len = get_sequence_len( prologue, prologue_end, 0 );
if (offset < len)
{
process_unwind_codes( prologue, prologue_end, context, ptrs, len - offset );
return NULL;
}
}
if (func->u.s.Ret != 3 && 2 * func->u.s.FunctionLength - offset <= 4 * (epilogue_end - epilogue)) {
/* Check epilogue */
len = get_sequence_len( epilogue, epilogue_end, 1 );
if (offset >= 2 * func->u.s.FunctionLength - len)
{
process_unwind_codes( epilogue, epilogue_end, context, ptrs, offset - (2 * func->u.s.FunctionLength - len) );
return NULL;
}
}
/* Execute full prologue */
process_unwind_codes( prologue, prologue_end, context, ptrs, 0 );
return NULL;
}
/***********************************************************************
* unwind_full_data
*/
static void *unwind_full_data( ULONG_PTR base, ULONG_PTR pc, RUNTIME_FUNCTION *func,
CONTEXT *context, PVOID *handler_data, KNONVOLATILE_CONTEXT_POINTERS *ptrs )
{
struct unwind_info *info;
struct unwind_info_epilog *info_epilog;
unsigned int i, codes, epilogs, len, offset;
void *data;
BYTE *end;
info = (struct unwind_info *)((char *)base + func->u.UnwindData);
data = info + 1;
epilogs = info->epilog;
codes = info->codes;
if (!codes && !epilogs)
{
struct unwind_info_ext *infoex = data;
codes = infoex->codes;
epilogs = infoex->epilog;
data = infoex + 1;
}
info_epilog = data;
if (!info->e) data = info_epilog + epilogs;
offset = (pc - base) - func->BeginAddress;
end = (BYTE *)data + codes * 4;
TRACE( "function %lx-%lx: len=%#x ver=%u X=%u E=%u F=%u epilogs=%u codes=%u\n",
base + func->BeginAddress, base + func->BeginAddress + info->function_length * 2,
info->function_length, info->version, info->x, info->e, info->f, epilogs, codes * 4 );
/* check for prolog */
if (offset < codes * 4 * 4 && !info->f)
{
len = get_sequence_len( data, end, 0 );
if (offset < len)
{
process_unwind_codes( data, end, context, ptrs, len - offset );
return NULL;
}
}
/* check for epilog */
if (!info->e)
{
for (i = 0; i < epilogs; i++)
{
/* TODO: Currently not checking epilogue conditions. */
if (offset < 2 * info_epilog[i].offset) break;
if (offset - 2 * info_epilog[i].offset < (codes * 4 - info_epilog[i].index) * 4)
{
BYTE *ptr = (BYTE *)data + info_epilog[i].index;
len = get_sequence_len( ptr, end, 1 );
if (offset <= 2 * info_epilog[i].offset + len)
{
process_unwind_codes( ptr, end, context, ptrs, offset - 2 * info_epilog[i].offset );
return NULL;
}
}
}
}
else if (2 * info->function_length - offset <= (codes * 4 - epilogs) * 4)
{
BYTE *ptr = (BYTE *)data + epilogs;
len = get_sequence_len( ptr, end, 1 );
if (offset >= 2 * info->function_length - len)
{
process_unwind_codes( ptr, end, context, ptrs, offset - (2 * info->function_length - len) );
return NULL;
}
}
process_unwind_codes( data, end, context, ptrs, 0 );
/* get handler since we are inside the main code */
if (info->x)
{
DWORD *handler_rva = (DWORD *)data + codes;
*handler_data = handler_rva + 1;
return (char *)base + *handler_rva;
}
return NULL;
}
/***********************************************************************
* RtlVirtualUnwind (NTDLL.@)
*/
PVOID WINAPI RtlVirtualUnwind( ULONG type, ULONG_PTR base, ULONG_PTR pc,
RUNTIME_FUNCTION *func, CONTEXT *context,
PVOID *handler_data, ULONG_PTR *frame_ret,
KNONVOLATILE_CONTEXT_POINTERS *ctx_ptr )
{
void *handler;
TRACE( "type %x pc %lx sp %x func %lx\n", type, pc, context->Sp, base + func->BeginAddress );
*handler_data = NULL;
context->Pc = 0;
if (func->u.s.Flag)
handler = unwind_packed_data( base, pc, func, context, ctx_ptr );
else
handler = unwind_full_data( base, pc, func, context, handler_data, ctx_ptr );
TRACE( "ret: lr=%x sp=%x handler=%p\n", context->Lr, context->Sp, handler );
if (!context->Pc)
context->Pc = context->Lr;
context->ContextFlags |= CONTEXT_UNWOUND_TO_CALL;
*frame_ret = context->Sp;
return handler;
}
/**********************************************************************
* call_consolidate_callback
*
* Wrapper function to call a consolidate callback from a fake frame.
* If the callback executes RtlUnwindEx (like for example done in C++ handlers),
* we have to skip all frames which were already processed. To do that we
* trick the unwinding functions into thinking the call came from somewhere
* else. All CFI instructions are either DW_CFA_def_cfa_expression or
* DW_CFA_expression, and the expressions have the following format:
*
* DW_OP_breg13; sleb128 <OFFSET> | Load SP + struct member offset
* [DW_OP_deref] | Dereference, only for CFA
*/
extern void * WINAPI call_consolidate_callback( CONTEXT *context,
void *(CALLBACK *callback)(EXCEPTION_RECORD *),
EXCEPTION_RECORD *rec );
__ASM_GLOBAL_FUNC( call_consolidate_callback,
"push {r0-r2,lr}\n\t"
__ASM_SEH(".seh_nop\n\t")
"sub sp, sp, #0x1a0\n\t"
__ASM_SEH(".seh_nop\n\t")
"mov r1, r0\n\t"
__ASM_SEH(".seh_nop\n\t")
"mov r0, sp\n\t"
__ASM_SEH(".seh_nop\n\t")
"mov r2, #0x1a0\n\t"
__ASM_SEH(".seh_nop_w\n\t")
"bl " __ASM_NAME("memcpy") "\n\t"
__ASM_SEH(".seh_custom 0xf4\n\t") /* A custom (unallocated) SEH opcode for CONTEXT on stack */
__ASM_SEH(".seh_endprologue\n\t")
__ASM_CFI(".cfi_def_cfa 13, 0\n\t")
__ASM_CFI(".cfi_escape 0x0f,0x04,0x7d,0xb8,0x00,0x06\n\t") /* DW_CFA_def_cfa_expression: DW_OP_breg13 + 56, DW_OP_deref */
__ASM_CFI(".cfi_escape 0x10,0x04,0x02,0x7d,0x14\n\t") /* DW_CFA_expression: R4 DW_OP_breg13 + 20 */
__ASM_CFI(".cfi_escape 0x10,0x05,0x02,0x7d,0x18\n\t") /* DW_CFA_expression: R5 DW_OP_breg13 + 24 */
__ASM_CFI(".cfi_escape 0x10,0x06,0x02,0x7d,0x1c\n\t") /* DW_CFA_expression: R6 DW_OP_breg13 + 28 */
__ASM_CFI(".cfi_escape 0x10,0x07,0x02,0x7d,0x20\n\t") /* DW_CFA_expression: R7 DW_OP_breg13 + 32 */
__ASM_CFI(".cfi_escape 0x10,0x08,0x02,0x7d,0x24\n\t") /* DW_CFA_expression: R8 DW_OP_breg13 + 36 */
__ASM_CFI(".cfi_escape 0x10,0x09,0x02,0x7d,0x28\n\t") /* DW_CFA_expression: R9 DW_OP_breg13 + 40 */
__ASM_CFI(".cfi_escape 0x10,0x0a,0x02,0x7d,0x2c\n\t") /* DW_CFA_expression: R10 DW_OP_breg13 + 44 */
__ASM_CFI(".cfi_escape 0x10,0x0b,0x02,0x7d,0x30\n\t") /* DW_CFA_expression: R11 DW_OP_breg13 + 48 */
__ASM_CFI(".cfi_escape 0x10,0x0e,0x03,0x7d,0xc0,0x00\n\t") /* DW_CFA_expression: LR DW_OP_breg13 + 64 (PC) */
/* Libunwind doesn't support the registers D8-D15 like this */
#if 0
__ASM_CFI(".cfi_escape 0x10,0x88,0x02,0x03,0x7d,0x90,0x01\n\t") /* DW_CFA_expression: D8 DW_OP_breg13 + 144 */
__ASM_CFI(".cfi_escape 0x10,0x89,0x02,0x03,0x7d,0x98,0x01\n\t") /* DW_CFA_expression: D9 DW_OP_breg13 + 152 */
__ASM_CFI(".cfi_escape 0x10,0x8a,0x02,0x03,0x7d,0xa0,0x01\n\t") /* DW_CFA_expression: D10 DW_OP_breg13 + 160 */
__ASM_CFI(".cfi_escape 0x10,0x8b,0x02,0x03,0x7d,0xa8,0x01\n\t") /* DW_CFA_expression: D11 DW_OP_breg13 + 168 */
__ASM_CFI(".cfi_escape 0x10,0x8c,0x02,0x03,0x7d,0xb0,0x01\n\t") /* DW_CFA_expression: D12 DW_OP_breg13 + 176 */
__ASM_CFI(".cfi_escape 0x10,0x8d,0x02,0x03,0x7d,0xb8,0x01\n\t") /* DW_CFA_expression: D13 DW_OP_breg13 + 184 */
__ASM_CFI(".cfi_escape 0x10,0x8e,0x02,0x03,0x7d,0xc0,0x01\n\t") /* DW_CFA_expression: D14 DW_OP_breg13 + 192 */
__ASM_CFI(".cfi_escape 0x10,0x8f,0x02,0x03,0x7d,0xc8,0x01\n\t") /* DW_CFA_expression: D15 DW_OP_breg13 + 200 */
#endif
"ldrd r1, r2, [sp, #0x1a4]\n\t"
"mov r0, r2\n\t"
"blx r1\n\t"
"add sp, sp, #0x1ac\n\t"
"pop {pc}\n\t")
/*******************************************************************
* RtlRestoreContext (NTDLL.@)
*/
void CDECL RtlRestoreContext( CONTEXT *context, EXCEPTION_RECORD *rec )
{
EXCEPTION_REGISTRATION_RECORD *teb_frame = NtCurrentTeb()->Tib.ExceptionList;
if (rec && rec->ExceptionCode == STATUS_LONGJUMP && rec->NumberParameters >= 1)
{
struct MSVCRT_JUMP_BUFFER *jmp = (struct MSVCRT_JUMP_BUFFER *)rec->ExceptionInformation[0];
int i;
for (i = 4; i <= 11; i++)
(&context->R4)[i-4] = (&jmp->R4)[i-4];
context->Lr = jmp->Pc;
context->Sp = jmp->Sp;
context->Fpscr = jmp->Fpscr;
for (i = 0; i < 8; i++)
context->u.D[8+i] = jmp->D[i];
}
else if (rec && rec->ExceptionCode == STATUS_UNWIND_CONSOLIDATE && rec->NumberParameters >= 1)
{
PVOID (CALLBACK *consolidate)(EXCEPTION_RECORD *) = (void *)rec->ExceptionInformation[0];
TRACE( "calling consolidate callback %p (rec=%p)\n", consolidate, rec );
rec->ExceptionInformation[10] = (ULONG_PTR)&context->R4;
context->Pc = (DWORD)call_consolidate_callback( context, consolidate, rec );
}
/* hack: remove no longer accessible TEB frames */
while ((DWORD)teb_frame < context->Sp)
{
TRACE( "removing TEB frame: %p\n", teb_frame );
teb_frame = __wine_pop_frame( teb_frame );
}
TRACE( "returning to %x stack %x\n", context->Pc, context->Sp );
NtContinue( context, FALSE );
}
/***********************************************************************
* RtlUnwindEx (NTDLL.@)
*/
void WINAPI RtlUnwindEx( PVOID end_frame, PVOID target_ip, EXCEPTION_RECORD *rec,
PVOID retval, CONTEXT *context, UNWIND_HISTORY_TABLE *table )
{
EXCEPTION_REGISTRATION_RECORD *teb_frame = NtCurrentTeb()->Tib.ExceptionList;
EXCEPTION_RECORD record;
DISPATCHER_CONTEXT dispatch;
CONTEXT new_context;
NTSTATUS status;
DWORD i;
RtlCaptureContext( context );
new_context = *context;
/* build an exception record, if we do not have one */
if (!rec)
{
record.ExceptionCode = STATUS_UNWIND;
record.ExceptionFlags = 0;
record.ExceptionRecord = NULL;
record.ExceptionAddress = (void *)context->Pc;
record.NumberParameters = 0;
rec = &record;
}
rec->ExceptionFlags |= EH_UNWINDING | (end_frame ? 0 : EH_EXIT_UNWIND);
TRACE( "code=%x flags=%x end_frame=%p target_ip=%p pc=%08x\n",
rec->ExceptionCode, rec->ExceptionFlags, end_frame, target_ip, context->Pc );
for (i = 0; i < min( EXCEPTION_MAXIMUM_PARAMETERS, rec->NumberParameters ); i++)
TRACE( " info[%d]=%016lx\n", i, rec->ExceptionInformation[i] );
TRACE(" r0=%08x r1=%08x r2=%08x r3=%08x\n",
context->R0, context->R1, context->R2, context->R3 );
TRACE(" r4=%08x r5=%08x r6=%08x r7=%08x\n",
context->R4, context->R5, context->R6, context->R7 );
TRACE(" r8=%08x r9=%08x r10=%08x r11=%08x\n",
context->R8, context->R9, context->R10, context->R11 );
TRACE(" r12=%08x sp=%08x lr=%08x pc=%08x\n",
context->R12, context->Sp, context->Lr, context->Pc );
dispatch.TargetPc = (ULONG_PTR)target_ip;
dispatch.ContextRecord = context;
dispatch.HistoryTable = table;
dispatch.NonVolatileRegisters = (BYTE *)&context->R4;
for (;;)
{
status = virtual_unwind( UNW_FLAG_UHANDLER, &dispatch, &new_context );
if (status != STATUS_SUCCESS) raise_status( status, rec );
unwind_done:
if (!dispatch.EstablisherFrame) break;
if (!is_valid_frame( dispatch.EstablisherFrame ))
{
ERR( "invalid frame %x (%p-%p)\n", dispatch.EstablisherFrame,
NtCurrentTeb()->Tib.StackLimit, NtCurrentTeb()->Tib.StackBase );
rec->ExceptionFlags |= EH_STACK_INVALID;
break;
}
if (dispatch.LanguageHandler)
{
if (end_frame && (dispatch.EstablisherFrame > (DWORD)end_frame))
{
ERR( "invalid end frame %x/%p\n", dispatch.EstablisherFrame, end_frame );
raise_status( STATUS_INVALID_UNWIND_TARGET, rec );
}
if (dispatch.EstablisherFrame == (DWORD)end_frame) rec->ExceptionFlags |= EH_TARGET_UNWIND;
if (call_unwind_handler( rec, &dispatch ) == ExceptionCollidedUnwind)
{
ULONG_PTR frame;
*context = new_context = *dispatch.ContextRecord;
dispatch.ContextRecord = context;
RtlVirtualUnwind( UNW_FLAG_NHANDLER, dispatch.ImageBase,
dispatch.ControlPc, dispatch.FunctionEntry,
&new_context, &dispatch.HandlerData, &frame,
NULL );
rec->ExceptionFlags |= EH_COLLIDED_UNWIND;
goto unwind_done;
}
rec->ExceptionFlags &= ~EH_COLLIDED_UNWIND;
}
else /* hack: call builtin handlers registered in the tib list */
{
DWORD backup_frame = dispatch.EstablisherFrame;
while ((DWORD)teb_frame < new_context.Sp && (DWORD)teb_frame < (DWORD)end_frame)
{
TRACE( "found builtin frame %p handler %p\n", teb_frame, teb_frame->Handler );
dispatch.EstablisherFrame = (DWORD)teb_frame;
if (call_teb_unwind_handler( rec, &dispatch, teb_frame ) == ExceptionCollidedUnwind)
{
ULONG_PTR frame;
teb_frame = __wine_pop_frame( teb_frame );
*context = new_context = *dispatch.ContextRecord;
dispatch.ContextRecord = context;
RtlVirtualUnwind( UNW_FLAG_NHANDLER, dispatch.ImageBase,
dispatch.ControlPc, dispatch.FunctionEntry,
&new_context, &dispatch.HandlerData,
&frame, NULL );
rec->ExceptionFlags |= EH_COLLIDED_UNWIND;
goto unwind_done;
}
teb_frame = __wine_pop_frame( teb_frame );
}
if ((DWORD)teb_frame == (DWORD)end_frame && (DWORD)end_frame < new_context.Sp) break;
dispatch.EstablisherFrame = backup_frame;
}
if (dispatch.EstablisherFrame == (DWORD)end_frame) break;
*context = new_context;
}
context->R0 = (DWORD)retval;
context->Pc = (DWORD)target_ip;
RtlRestoreContext(context, rec);
}
/***********************************************************************
* RtlUnwind (NTDLL.@)
*/
void WINAPI RtlUnwind( void *frame, void *target_ip, EXCEPTION_RECORD *rec, void *retval )
{
CONTEXT context;
RtlUnwindEx( frame, target_ip, rec, retval, &context, NULL );
}
/*******************************************************************
* __jump_unwind (NTDLL.@)
*/
void WINAPI __jump_unwind( void *frame, void *target_ip )
{
CONTEXT context;
RtlUnwindEx( frame, target_ip, NULL, NULL, &context, NULL );
}
extern LONG __C_ExecuteExceptionFilter(PEXCEPTION_POINTERS ptrs, PVOID frame,
PEXCEPTION_FILTER filter,
PUCHAR nonvolatile);
__ASM_GLOBAL_FUNC( __C_ExecuteExceptionFilter,
"push {r4-r11,lr}\n\t"
__ASM_SEH(".seh_save_regs_w {r4-r11,lr}\n\t")
__ASM_SEH(".seh_endprologue\n\t")
__ASM_CFI(".cfi_def_cfa 13, 36\n\t")
__ASM_CFI(".cfi_offset r4, -36\n\t")
__ASM_CFI(".cfi_offset r5, -32\n\t")
__ASM_CFI(".cfi_offset r6, -28\n\t")
__ASM_CFI(".cfi_offset r7, -24\n\t")
__ASM_CFI(".cfi_offset r8, -20\n\t")
__ASM_CFI(".cfi_offset r9, -16\n\t")
__ASM_CFI(".cfi_offset r10, -12\n\t")
__ASM_CFI(".cfi_offset r11, -8\n\t")
__ASM_CFI(".cfi_offset lr, -4\n\t")
"ldm r3, {r4-r11,lr}\n\t"
"blx r2\n\t"
"pop {r4-r11,pc}\n\t" )
extern void __C_ExecuteTerminationHandler(BOOL abnormal, PVOID frame,
PTERMINATION_HANDLER handler,
PUCHAR nonvolatile);
/* This is, implementation wise, identical to __C_ExecuteExceptionFilter. */
__ASM_GLOBAL_FUNC( __C_ExecuteTerminationHandler,
"b " __ASM_NAME("__C_ExecuteExceptionFilter") "\n\t");
/*******************************************************************
* __C_specific_handler (NTDLL.@)
*/
EXCEPTION_DISPOSITION WINAPI __C_specific_handler( EXCEPTION_RECORD *rec,
void *frame,
CONTEXT *context,
struct _DISPATCHER_CONTEXT *dispatch )
{
SCOPE_TABLE *table = dispatch->HandlerData;
ULONG i;
DWORD ControlPc = dispatch->ControlPc;
TRACE( "%p %p %p %p\n", rec, frame, context, dispatch );
if (TRACE_ON(seh)) dump_scope_table( dispatch->ImageBase, table );
if (dispatch->ControlPcIsUnwound)
ControlPc -= 2;
if (rec->ExceptionFlags & (EH_UNWINDING | EH_EXIT_UNWIND))
{
for (i = dispatch->ScopeIndex; i < table->Count; i++)
{
if (ControlPc >= dispatch->ImageBase + table->ScopeRecord[i].BeginAddress &&
ControlPc < dispatch->ImageBase + table->ScopeRecord[i].EndAddress)
{
PTERMINATION_HANDLER handler;
if (table->ScopeRecord[i].JumpTarget) continue;
if (rec->ExceptionFlags & EH_TARGET_UNWIND &&
dispatch->TargetPc >= dispatch->ImageBase + table->ScopeRecord[i].BeginAddress &&
dispatch->TargetPc < dispatch->ImageBase + table->ScopeRecord[i].EndAddress)
{
break;
}
handler = (PTERMINATION_HANDLER)(dispatch->ImageBase + table->ScopeRecord[i].HandlerAddress);
dispatch->ScopeIndex = i+1;
TRACE( "calling __finally %p frame %p\n", handler, frame );
__C_ExecuteTerminationHandler( TRUE, frame, handler,
dispatch->NonVolatileRegisters );
}
}
return ExceptionContinueSearch;
}
for (i = dispatch->ScopeIndex; i < table->Count; i++)
{
if (ControlPc >= dispatch->ImageBase + table->ScopeRecord[i].BeginAddress &&
ControlPc < dispatch->ImageBase + table->ScopeRecord[i].EndAddress)
{
if (!table->ScopeRecord[i].JumpTarget) continue;
if (table->ScopeRecord[i].HandlerAddress != EXCEPTION_EXECUTE_HANDLER)
{
EXCEPTION_POINTERS ptrs;
PEXCEPTION_FILTER filter;
filter = (PEXCEPTION_FILTER)(dispatch->ImageBase + table->ScopeRecord[i].HandlerAddress);
ptrs.ExceptionRecord = rec;
ptrs.ContextRecord = context;
TRACE( "calling filter %p ptrs %p frame %p\n", filter, &ptrs, frame );
switch (__C_ExecuteExceptionFilter( &ptrs, frame, filter,
dispatch->NonVolatileRegisters ))
{
case EXCEPTION_EXECUTE_HANDLER:
break;
case EXCEPTION_CONTINUE_SEARCH:
continue;
case EXCEPTION_CONTINUE_EXECUTION:
return ExceptionContinueExecution;
}
}
TRACE( "unwinding to target %lx\n", dispatch->ImageBase + table->ScopeRecord[i].JumpTarget );
RtlUnwindEx( frame, (char *)dispatch->ImageBase + table->ScopeRecord[i].JumpTarget,
rec, 0, dispatch->ContextRecord, dispatch->HistoryTable );
}
}
return ExceptionContinueSearch;
}
/***********************************************************************
* RtlRaiseException (NTDLL.@)
*/
__ASM_STDCALL_FUNC( RtlRaiseException, 4,
"push {r0, lr}\n\t"
__ASM_SEH(".seh_save_regs {r0, lr}\n\t")
"sub sp, sp, #0x1a0\n\t" /* sizeof(CONTEXT) */
__ASM_SEH(".seh_stackalloc 0x1a0\n\t")
__ASM_SEH(".seh_endprologue\n\t")
__ASM_CFI(".cfi_adjust_cfa_offset 424\n\t")
__ASM_CFI(".cfi_offset lr, -4\n\t")
"mov r0, sp\n\t" /* context */
"bl " __ASM_NAME("RtlCaptureContext") "\n\t"
"ldr r0, [sp, #0x1a0]\n\t" /* rec */
"ldr r1, [sp, #0x1a4]\n\t"
"str r1, [sp, #0x3c]\n\t" /* context->Lr */
"str r1, [sp, #0x40]\n\t" /* context->Pc */
"mrs r2, CPSR\n\t"
"bfi r2, r1, #5, #1\n\t" /* Thumb bit */
"str r2, [sp, #0x44]\n\t" /* context->Cpsr */
"str r1, [r0, #12]\n\t" /* rec->ExceptionAddress */
"add r1, sp, #0x1a8\n\t"
"str r1, [sp, #0x38]\n\t" /* context->Sp */
"mov r1, sp\n\t"
"mov r2, #1\n\t"
"bl " __ASM_NAME("NtRaiseException") "\n\t"
"bl " __ASM_NAME("RtlRaiseStatus") )
/*************************************************************************
* RtlCaptureStackBackTrace (NTDLL.@)
*/
USHORT WINAPI RtlCaptureStackBackTrace( ULONG skip, ULONG count, PVOID *buffer, ULONG *hash )
{
FIXME( "(%d, %d, %p, %p) stub!\n", skip, count, buffer, hash );
return 0;
}
/***********************************************************************
* signal_start_thread
*/
__ASM_GLOBAL_FUNC( signal_start_thread,
"mov sp, r0\n\t" /* context */
"mov r1, #1\n\t"
"b " __ASM_NAME("NtContinue") )
/**********************************************************************
* DbgBreakPoint (NTDLL.@)
*/
__ASM_STDCALL_FUNC( DbgBreakPoint, 0, "udf #0xfe; bx lr; nop; nop; nop; nop" );
/**********************************************************************
* DbgUserBreakPoint (NTDLL.@)
*/
__ASM_STDCALL_FUNC( DbgUserBreakPoint, 0, "udf #0xfe; bx lr; nop; nop; nop; nop" );
#endif /* __arm__ */
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