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msvcrt: Move more i386-specific exception code to except_i386.c.

This commit is contained in:
Alexandre Julliard 2012-03-13 15:24:18 +01:00
parent aba6423b83
commit 89b2dd08ff
3 changed files with 542 additions and 544 deletions
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61
dlls/msvcrt/cppexcept.h
View File

@ -44,59 +44,6 @@ typedef struct __exception
int do_free; /* Whether to free 'name' in our dtor */
} exception;
/* the exception frame used by CxxFrameHandler */
typedef struct __cxx_exception_frame
{
EXCEPTION_REGISTRATION_RECORD frame; /* the standard exception frame */
int trylevel;
DWORD ebp;
} cxx_exception_frame;
/* info about a single catch {} block */
typedef struct __catchblock_info
{
UINT flags; /* flags (see below) */
const type_info *type_info; /* C++ type caught by this block */
int offset; /* stack offset to copy exception object to */
void (*handler)(void);/* catch block handler code */
} catchblock_info;
#define TYPE_FLAG_CONST 1
#define TYPE_FLAG_VOLATILE 2
#define TYPE_FLAG_REFERENCE 8
/* info about a single try {} block */
typedef struct __tryblock_info
{
int start_level; /* start trylevel of that block */
int end_level; /* end trylevel of that block */
int catch_level; /* initial trylevel of the catch block */
int catchblock_count; /* count of catch blocks in array */
const catchblock_info *catchblock; /* array of catch blocks */
} tryblock_info;
/* info about the unwind handler for a given trylevel */
typedef struct __unwind_info
{
int prev; /* prev trylevel unwind handler, to run after this one */
void (*handler)(void);/* unwind handler */
} unwind_info;
/* descriptor of all try blocks of a given function */
typedef struct __cxx_function_descr
{
UINT magic; /* must be CXX_FRAME_MAGIC */
UINT unwind_count; /* number of unwind handlers */
const unwind_info *unwind_table; /* array of unwind handlers */
UINT tryblock_count; /* number of try blocks */
const tryblock_info *tryblock; /* array of try blocks */
UINT ipmap_count;
const void *ipmap;
const void *expect_list; /* expected exceptions list when magic >= VC7 */
UINT flags; /* flags when magic >= VC8 */
} cxx_function_descr;
#define FUNC_DESCR_SYNCHRONOUS 1 /* synchronous exceptions only (built with /EHs) */
typedef void (*cxx_copy_ctor)(void);
/* offsets for computing the this pointer */
@ -126,9 +73,12 @@ typedef struct __cxx_type_info_table
const cxx_type_info *info[3]; /* variable length, we declare it large enough for static RTTI */
} cxx_type_info_table;
typedef DWORD (*cxx_exc_custom_handler)( PEXCEPTION_RECORD, cxx_exception_frame*,
struct __cxx_exception_frame;
struct __cxx_function_descr;
typedef DWORD (*cxx_exc_custom_handler)( PEXCEPTION_RECORD, struct __cxx_exception_frame*,
PCONTEXT, EXCEPTION_REGISTRATION_RECORD**,
const cxx_function_descr*, int nested_trylevel,
const struct __cxx_function_descr*, int nested_trylevel,
EXCEPTION_REGISTRATION_RECORD *nested_frame, DWORD unknown3 );
/* type information for an exception object */
@ -142,7 +92,6 @@ typedef struct __cxx_exception_type
void WINAPI _CxxThrowException(exception*,const cxx_exception_type*);
int CDECL _XcptFilter(NTSTATUS, PEXCEPTION_POINTERS);
int CDECL __CppXcptFilter(NTSTATUS, PEXCEPTION_POINTERS);
static inline const char *dbgstr_type_info( const type_info *info )
{

489
dlls/msvcrt/except.c
View File

@ -41,494 +41,7 @@ WINE_DEFAULT_DEBUG_CHANNEL(seh);
static MSVCRT_security_error_handler security_error_handler;
/* VC++ extensions to Win32 SEH */
typedef struct _SCOPETABLE
{
int previousTryLevel;
int (*lpfnFilter)(PEXCEPTION_POINTERS);
int (*lpfnHandler)(void);
} SCOPETABLE, *PSCOPETABLE;
typedef struct _MSVCRT_EXCEPTION_FRAME
{
EXCEPTION_REGISTRATION_RECORD *prev;
void (*handler)(PEXCEPTION_RECORD, EXCEPTION_REGISTRATION_RECORD*,
PCONTEXT, PEXCEPTION_RECORD);
PSCOPETABLE scopetable;
int trylevel;
int _ebp;
PEXCEPTION_POINTERS xpointers;
} MSVCRT_EXCEPTION_FRAME;
typedef struct
{
int gs_cookie_offset;
ULONG gs_cookie_xor;
int eh_cookie_offset;
ULONG eh_cookie_xor;
SCOPETABLE entries[1];
} SCOPETABLE_V4;
#define TRYLEVEL_END (-1) /* End of trylevel list */
#if defined(__GNUC__) && defined(__i386__)
static inline void call_finally_block( void *code_block, void *base_ptr )
{
__asm__ __volatile__ ("movl %1,%%ebp; call *%%eax"
: : "a" (code_block), "g" (base_ptr));
}
static inline int call_filter( int (*func)(PEXCEPTION_POINTERS), void *arg, void *ebp )
{
int ret;
__asm__ __volatile__ ("pushl %%ebp; pushl %3; movl %2,%%ebp; call *%%eax; popl %%ebp; popl %%ebp"
: "=a" (ret)
: "0" (func), "r" (ebp), "r" (arg)
: "ecx", "edx", "memory" );
return ret;
}
static inline int call_unwind_func( int (*func)(void), void *ebp )
{
int ret;
__asm__ __volatile__ ("pushl %%ebp\n\t"
"pushl %%ebx\n\t"
"pushl %%esi\n\t"
"pushl %%edi\n\t"
"movl %2,%%ebp\n\t"
"call *%0\n\t"
"popl %%edi\n\t"
"popl %%esi\n\t"
"popl %%ebx\n\t"
"popl %%ebp"
: "=a" (ret)
: "0" (func), "r" (ebp)
: "ecx", "edx", "memory" );
return ret;
}
#endif
#ifdef __i386__
static const SCOPETABLE_V4 *get_scopetable_v4( MSVCRT_EXCEPTION_FRAME *frame, ULONG_PTR cookie )
{
return (const SCOPETABLE_V4 *)((ULONG_PTR)frame->scopetable ^ cookie);
}
static DWORD MSVCRT_nested_handler(PEXCEPTION_RECORD rec,
EXCEPTION_REGISTRATION_RECORD* frame,
PCONTEXT context,
EXCEPTION_REGISTRATION_RECORD** dispatch)
{
if (!(rec->ExceptionFlags & (EH_UNWINDING | EH_EXIT_UNWIND)))
return ExceptionContinueSearch;
*dispatch = frame;
return ExceptionCollidedUnwind;
}
/*********************************************************************
* _EH_prolog (MSVCRT.@)
*/
/* Provided for VC++ binary compatibility only */
__ASM_GLOBAL_FUNC(_EH_prolog,
__ASM_CFI(".cfi_adjust_cfa_offset 4\n\t") /* skip ret addr */
"pushl $-1\n\t"
__ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
"pushl %eax\n\t"
__ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
"pushl %fs:0\n\t"
__ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
"movl %esp, %fs:0\n\t"
"movl 12(%esp), %eax\n\t"
"movl %ebp, 12(%esp)\n\t"
"leal 12(%esp), %ebp\n\t"
"pushl %eax\n\t"
__ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
"ret")
static void msvcrt_local_unwind2(MSVCRT_EXCEPTION_FRAME* frame, int trylevel, void *ebp)
{
EXCEPTION_REGISTRATION_RECORD reg;
TRACE("(%p,%d,%d)\n",frame, frame->trylevel, trylevel);
/* Register a handler in case of a nested exception */
reg.Handler = MSVCRT_nested_handler;
reg.Prev = NtCurrentTeb()->Tib.ExceptionList;
__wine_push_frame(&reg);
while (frame->trylevel != TRYLEVEL_END && frame->trylevel != trylevel)
{
int level = frame->trylevel;
frame->trylevel = frame->scopetable[level].previousTryLevel;
if (!frame->scopetable[level].lpfnFilter)
{
TRACE( "__try block cleanup level %d handler %p ebp %p\n",
level, frame->scopetable[level].lpfnHandler, ebp );
call_unwind_func( frame->scopetable[level].lpfnHandler, ebp );
}
}
__wine_pop_frame(&reg);
TRACE("unwound OK\n");
}
static void msvcrt_local_unwind4( ULONG *cookie, MSVCRT_EXCEPTION_FRAME* frame, int trylevel, void *ebp )
{
EXCEPTION_REGISTRATION_RECORD reg;
const SCOPETABLE_V4 *scopetable = get_scopetable_v4( frame, *cookie );
TRACE("(%p,%d,%d)\n",frame, frame->trylevel, trylevel);
/* Register a handler in case of a nested exception */
reg.Handler = MSVCRT_nested_handler;
reg.Prev = NtCurrentTeb()->Tib.ExceptionList;
__wine_push_frame(&reg);
while (frame->trylevel != -2 && frame->trylevel != trylevel)
{
int level = frame->trylevel;
frame->trylevel = scopetable->entries[level].previousTryLevel;
if (!scopetable->entries[level].lpfnFilter)
{
TRACE( "__try block cleanup level %d handler %p ebp %p\n",
level, scopetable->entries[level].lpfnHandler, ebp );
call_unwind_func( scopetable->entries[level].lpfnHandler, ebp );
}
}
__wine_pop_frame(&reg);
TRACE("unwound OK\n");
}
/*******************************************************************
* _local_unwind2 (MSVCRT.@)
*/
void CDECL _local_unwind2(MSVCRT_EXCEPTION_FRAME* frame, int trylevel)
{
msvcrt_local_unwind2( frame, trylevel, &frame->_ebp );
}
/*******************************************************************
* _local_unwind4 (MSVCRT.@)
*/
void CDECL _local_unwind4( ULONG *cookie, MSVCRT_EXCEPTION_FRAME* frame, int trylevel )
{
msvcrt_local_unwind4( cookie, frame, trylevel, &frame->_ebp );
}
/*******************************************************************
* _global_unwind2 (MSVCRT.@)
*/
void CDECL _global_unwind2(EXCEPTION_REGISTRATION_RECORD* frame)
{
TRACE("(%p)\n",frame);
RtlUnwind( frame, 0, 0, 0 );
}
/*********************************************************************
* _except_handler2 (MSVCRT.@)
*/
int CDECL _except_handler2(PEXCEPTION_RECORD rec,
EXCEPTION_REGISTRATION_RECORD* frame,
PCONTEXT context,
EXCEPTION_REGISTRATION_RECORD** dispatcher)
{
FIXME("exception %x flags=%x at %p handler=%p %p %p stub\n",
rec->ExceptionCode, rec->ExceptionFlags, rec->ExceptionAddress,
frame->Handler, context, dispatcher);
return ExceptionContinueSearch;
}
/*********************************************************************
* _except_handler3 (MSVCRT.@)
*/
int CDECL _except_handler3(PEXCEPTION_RECORD rec,
MSVCRT_EXCEPTION_FRAME* frame,
PCONTEXT context, void* dispatcher)
{
int retval, trylevel;
EXCEPTION_POINTERS exceptPtrs;
PSCOPETABLE pScopeTable;
TRACE("exception %x flags=%x at %p handler=%p %p %p semi-stub\n",
rec->ExceptionCode, rec->ExceptionFlags, rec->ExceptionAddress,
frame->handler, context, dispatcher);
__asm__ __volatile__ ("cld");
if (rec->ExceptionFlags & (EH_UNWINDING | EH_EXIT_UNWIND))
{
/* Unwinding the current frame */
msvcrt_local_unwind2(frame, TRYLEVEL_END, &frame->_ebp);
TRACE("unwound current frame, returning ExceptionContinueSearch\n");
return ExceptionContinueSearch;
}
else
{
/* Hunting for handler */
exceptPtrs.ExceptionRecord = rec;
exceptPtrs.ContextRecord = context;
*((DWORD *)frame-1) = (DWORD)&exceptPtrs;
trylevel = frame->trylevel;
pScopeTable = frame->scopetable;
while (trylevel != TRYLEVEL_END)
{
TRACE( "level %d prev %d filter %p\n", trylevel, pScopeTable[trylevel].previousTryLevel,
pScopeTable[trylevel].lpfnFilter );
if (pScopeTable[trylevel].lpfnFilter)
{
retval = call_filter( pScopeTable[trylevel].lpfnFilter, &exceptPtrs, &frame->_ebp );
TRACE("filter returned %s\n", retval == EXCEPTION_CONTINUE_EXECUTION ?
"CONTINUE_EXECUTION" : retval == EXCEPTION_EXECUTE_HANDLER ?
"EXECUTE_HANDLER" : "CONTINUE_SEARCH");
if (retval == EXCEPTION_CONTINUE_EXECUTION)
return ExceptionContinueExecution;
if (retval == EXCEPTION_EXECUTE_HANDLER)
{
/* Unwind all higher frames, this one will handle the exception */
_global_unwind2((EXCEPTION_REGISTRATION_RECORD*)frame);
msvcrt_local_unwind2(frame, trylevel, &frame->_ebp);
/* Set our trylevel to the enclosing block, and call the __finally
* code, which won't return
*/
frame->trylevel = pScopeTable[trylevel].previousTryLevel;
TRACE("__finally block %p\n",pScopeTable[trylevel].lpfnHandler);
call_finally_block(pScopeTable[trylevel].lpfnHandler, &frame->_ebp);
ERR("Returned from __finally block - expect crash!\n");
}
}
trylevel = pScopeTable[trylevel].previousTryLevel;
}
}
TRACE("reached TRYLEVEL_END, returning ExceptionContinueSearch\n");
return ExceptionContinueSearch;
}
/*********************************************************************
* _except_handler4_common (MSVCRT.@)
*/
int CDECL _except_handler4_common( ULONG *cookie, void (*check_cookie)(void),
EXCEPTION_RECORD *rec, MSVCRT_EXCEPTION_FRAME *frame,
CONTEXT *context, EXCEPTION_REGISTRATION_RECORD **dispatcher )
{
int retval, trylevel;
EXCEPTION_POINTERS exceptPtrs;
const SCOPETABLE_V4 *scope_table = get_scopetable_v4( frame, *cookie );
TRACE( "exception %x flags=%x at %p handler=%p %p %p cookie=%x scope table=%p cookies=%d/%x,%d/%x\n",
rec->ExceptionCode, rec->ExceptionFlags, rec->ExceptionAddress,
frame->handler, context, dispatcher, *cookie, scope_table,
scope_table->gs_cookie_offset, scope_table->gs_cookie_xor,
scope_table->eh_cookie_offset, scope_table->eh_cookie_xor );
/* FIXME: no cookie validation yet */
if (rec->ExceptionFlags & (EH_UNWINDING | EH_EXIT_UNWIND))
{
/* Unwinding the current frame */
msvcrt_local_unwind4( cookie, frame, -2, &frame->_ebp );
TRACE("unwound current frame, returning ExceptionContinueSearch\n");
return ExceptionContinueSearch;
}
else
{
/* Hunting for handler */
exceptPtrs.ExceptionRecord = rec;
exceptPtrs.ContextRecord = context;
*((DWORD *)frame-1) = (DWORD)&exceptPtrs;
trylevel = frame->trylevel;
while (trylevel != -2)
{
TRACE( "level %d prev %d filter %p\n", trylevel,
scope_table->entries[trylevel].previousTryLevel,
scope_table->entries[trylevel].lpfnFilter );
if (scope_table->entries[trylevel].lpfnFilter)
{
retval = call_filter( scope_table->entries[trylevel].lpfnFilter, &exceptPtrs, &frame->_ebp );
TRACE("filter returned %s\n", retval == EXCEPTION_CONTINUE_EXECUTION ?
"CONTINUE_EXECUTION" : retval == EXCEPTION_EXECUTE_HANDLER ?
"EXECUTE_HANDLER" : "CONTINUE_SEARCH");
if (retval == EXCEPTION_CONTINUE_EXECUTION)
return ExceptionContinueExecution;
if (retval == EXCEPTION_EXECUTE_HANDLER)
{
/* Unwind all higher frames, this one will handle the exception */
_global_unwind2((EXCEPTION_REGISTRATION_RECORD*)frame);
msvcrt_local_unwind4( cookie, frame, trylevel, &frame->_ebp );
/* Set our trylevel to the enclosing block, and call the __finally
* code, which won't return
*/
frame->trylevel = scope_table->entries[trylevel].previousTryLevel;
TRACE("__finally block %p\n",scope_table->entries[trylevel].lpfnHandler);
call_finally_block(scope_table->entries[trylevel].lpfnHandler, &frame->_ebp);
ERR("Returned from __finally block - expect crash!\n");
}
}
trylevel = scope_table->entries[trylevel].previousTryLevel;
}
}
TRACE("reached -2, returning ExceptionContinueSearch\n");
return ExceptionContinueSearch;
}
/*
* setjmp/longjmp implementation
*/
#define MSVCRT_JMP_MAGIC 0x56433230 /* ID value for new jump structure */
typedef void (__stdcall *MSVCRT_unwind_function)(const struct MSVCRT___JUMP_BUFFER *);
/* define an entrypoint for setjmp/setjmp3 that stores the registers in the jmp buf */
/* and then jumps to the C backend function */
#define DEFINE_SETJMP_ENTRYPOINT(name) \
__ASM_GLOBAL_FUNC( name, \
"movl 4(%esp),%ecx\n\t" /* jmp_buf */ \
"movl %ebp,0(%ecx)\n\t" /* jmp_buf.Ebp */ \
"movl %ebx,4(%ecx)\n\t" /* jmp_buf.Ebx */ \
"movl %edi,8(%ecx)\n\t" /* jmp_buf.Edi */ \
"movl %esi,12(%ecx)\n\t" /* jmp_buf.Esi */ \
"movl %esp,16(%ecx)\n\t" /* jmp_buf.Esp */ \
"movl 0(%esp),%eax\n\t" \
"movl %eax,20(%ecx)\n\t" /* jmp_buf.Eip */ \
"jmp " __ASM_NAME("__regs_") # name )
/* restore the registers from the jmp buf upon longjmp */
extern void DECLSPEC_NORETURN longjmp_set_regs( struct MSVCRT___JUMP_BUFFER *jmp, int retval );
__ASM_GLOBAL_FUNC( longjmp_set_regs,
"movl 4(%esp),%ecx\n\t" /* jmp_buf */
"movl 8(%esp),%eax\n\t" /* retval */
"movl 0(%ecx),%ebp\n\t" /* jmp_buf.Ebp */
"movl 4(%ecx),%ebx\n\t" /* jmp_buf.Ebx */
"movl 8(%ecx),%edi\n\t" /* jmp_buf.Edi */
"movl 12(%ecx),%esi\n\t" /* jmp_buf.Esi */
"movl 16(%ecx),%esp\n\t" /* jmp_buf.Esp */
"addl $4,%esp\n\t" /* get rid of return address */
"jmp *20(%ecx)\n\t" /* jmp_buf.Eip */ )
/*
* The signatures of the setjmp/longjmp functions do not match that
* declared in the setjmp header so they don't follow the regular naming
* convention to avoid conflicts.
*/
/*******************************************************************
* _setjmp (MSVCRT.@)
*/
DEFINE_SETJMP_ENTRYPOINT(MSVCRT__setjmp)
int CDECL __regs_MSVCRT__setjmp(struct MSVCRT___JUMP_BUFFER *jmp)
{
jmp->Registration = (unsigned long)NtCurrentTeb()->Tib.ExceptionList;
if (jmp->Registration == ~0UL)
jmp->TryLevel = TRYLEVEL_END;
else
jmp->TryLevel = ((MSVCRT_EXCEPTION_FRAME*)jmp->Registration)->trylevel;
TRACE("buf=%p ebx=%08lx esi=%08lx edi=%08lx ebp=%08lx esp=%08lx eip=%08lx frame=%08lx\n",
jmp, jmp->Ebx, jmp->Esi, jmp->Edi, jmp->Ebp, jmp->Esp, jmp->Eip, jmp->Registration );
return 0;
}
/*******************************************************************
* _setjmp3 (MSVCRT.@)
*/
DEFINE_SETJMP_ENTRYPOINT( MSVCRT__setjmp3 )
int CDECL __regs_MSVCRT__setjmp3(struct MSVCRT___JUMP_BUFFER *jmp, int nb_args, ...)
{
jmp->Cookie = MSVCRT_JMP_MAGIC;
jmp->UnwindFunc = 0;
jmp->Registration = (unsigned long)NtCurrentTeb()->Tib.ExceptionList;
if (jmp->Registration == ~0UL)
{
jmp->TryLevel = TRYLEVEL_END;
}
else
{
int i;
va_list args;
va_start( args, nb_args );
if (nb_args > 0) jmp->UnwindFunc = va_arg( args, unsigned long );
if (nb_args > 1) jmp->TryLevel = va_arg( args, unsigned long );
else jmp->TryLevel = ((MSVCRT_EXCEPTION_FRAME*)jmp->Registration)->trylevel;
for (i = 0; i < 6 && i < nb_args - 2; i++)
jmp->UnwindData[i] = va_arg( args, unsigned long );
va_end( args );
}
TRACE("buf=%p ebx=%08lx esi=%08lx edi=%08lx ebp=%08lx esp=%08lx eip=%08lx frame=%08lx\n",
jmp, jmp->Ebx, jmp->Esi, jmp->Edi, jmp->Ebp, jmp->Esp, jmp->Eip, jmp->Registration );
return 0;
}
/*********************************************************************
* longjmp (MSVCRT.@)
*/
void CDECL MSVCRT_longjmp(struct MSVCRT___JUMP_BUFFER *jmp, int retval)
{
unsigned long cur_frame = 0;
TRACE("buf=%p ebx=%08lx esi=%08lx edi=%08lx ebp=%08lx esp=%08lx eip=%08lx frame=%08lx retval=%08x\n",
jmp, jmp->Ebx, jmp->Esi, jmp->Edi, jmp->Ebp, jmp->Esp, jmp->Eip, jmp->Registration, retval );
cur_frame=(unsigned long)NtCurrentTeb()->Tib.ExceptionList;
TRACE("cur_frame=%lx\n",cur_frame);
if (cur_frame != jmp->Registration)
_global_unwind2((EXCEPTION_REGISTRATION_RECORD*)jmp->Registration);
if (jmp->Registration)
{
if (!IsBadReadPtr(&jmp->Cookie, sizeof(long)) &&
jmp->Cookie == MSVCRT_JMP_MAGIC && jmp->UnwindFunc)
{
MSVCRT_unwind_function unwind_func;
unwind_func=(MSVCRT_unwind_function)jmp->UnwindFunc;
unwind_func(jmp);
}
else
msvcrt_local_unwind2((MSVCRT_EXCEPTION_FRAME*)jmp->Registration,
jmp->TryLevel, (void *)jmp->Ebp);
}
if (!retval)
retval = 1;
longjmp_set_regs( jmp, retval );
}
/*********************************************************************
* _seh_longjmp_unwind (MSVCRT.@)
*/
void __stdcall _seh_longjmp_unwind(struct MSVCRT___JUMP_BUFFER *jmp)
{
msvcrt_local_unwind2( (MSVCRT_EXCEPTION_FRAME *)jmp->Registration, jmp->TryLevel, (void *)jmp->Ebp );
}
/*********************************************************************
* _seh_longjmp_unwind4 (MSVCRT.@)
*/
void __stdcall _seh_longjmp_unwind4(struct MSVCRT___JUMP_BUFFER *jmp)
{
msvcrt_local_unwind4( (void *)jmp->Cookie, (MSVCRT_EXCEPTION_FRAME *)jmp->Registration,
jmp->TryLevel, (void *)jmp->Ebp );
}
#elif defined(__x86_64__)
#ifdef __x86_64__
/*******************************************************************
* _setjmp (MSVCRT.@)

536
dlls/msvcrt/except_i386.c
View File

@ -1,7 +1,9 @@
/*
* msvcrt C++ exception handling
*
* Copyright 2000 Jon Griffiths
* Copyright 2002 Alexandre Julliard
* Copyright 2005 Juan Lang
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
@ -42,6 +44,89 @@
WINE_DEFAULT_DEBUG_CHANNEL(seh);
/* the exception frame used by CxxFrameHandler */
typedef struct __cxx_exception_frame
{
EXCEPTION_REGISTRATION_RECORD frame; /* the standard exception frame */
int trylevel;
DWORD ebp;
} cxx_exception_frame;
/* info about a single catch {} block */
typedef struct __catchblock_info
{
UINT flags; /* flags (see below) */
const type_info *type_info; /* C++ type caught by this block */
int offset; /* stack offset to copy exception object to */
void (*handler)(void);/* catch block handler code */
} catchblock_info;
#define TYPE_FLAG_CONST 1
#define TYPE_FLAG_VOLATILE 2
#define TYPE_FLAG_REFERENCE 8
/* info about a single try {} block */
typedef struct __tryblock_info
{
int start_level; /* start trylevel of that block */
int end_level; /* end trylevel of that block */
int catch_level; /* initial trylevel of the catch block */
int catchblock_count; /* count of catch blocks in array */
const catchblock_info *catchblock; /* array of catch blocks */
} tryblock_info;
/* info about the unwind handler for a given trylevel */
typedef struct __unwind_info
{
int prev; /* prev trylevel unwind handler, to run after this one */
void (*handler)(void);/* unwind handler */
} unwind_info;
/* descriptor of all try blocks of a given function */
typedef struct __cxx_function_descr
{
UINT magic; /* must be CXX_FRAME_MAGIC */
UINT unwind_count; /* number of unwind handlers */
const unwind_info *unwind_table; /* array of unwind handlers */
UINT tryblock_count; /* number of try blocks */
const tryblock_info *tryblock; /* array of try blocks */
UINT ipmap_count;
const void *ipmap;
const void *expect_list; /* expected exceptions list when magic >= VC7 */
UINT flags; /* flags when magic >= VC8 */
} cxx_function_descr;
#define FUNC_DESCR_SYNCHRONOUS 1 /* synchronous exceptions only (built with /EHs) */
typedef struct _SCOPETABLE
{
int previousTryLevel;
int (*lpfnFilter)(PEXCEPTION_POINTERS);
int (*lpfnHandler)(void);
} SCOPETABLE, *PSCOPETABLE;
typedef struct _MSVCRT_EXCEPTION_FRAME
{
EXCEPTION_REGISTRATION_RECORD *prev;
void (*handler)(PEXCEPTION_RECORD, EXCEPTION_REGISTRATION_RECORD*,
PCONTEXT, PEXCEPTION_RECORD);
PSCOPETABLE scopetable;
int trylevel;
int _ebp;
PEXCEPTION_POINTERS xpointers;
} MSVCRT_EXCEPTION_FRAME;
typedef struct
{
int gs_cookie_offset;
ULONG gs_cookie_xor;
int eh_cookie_offset;
ULONG eh_cookie_xor;
SCOPETABLE entries[1];
} SCOPETABLE_V4;
#define TRYLEVEL_END (-1) /* End of trylevel list */
DWORD CDECL cxx_frame_handler( PEXCEPTION_RECORD rec, cxx_exception_frame* frame,
PCONTEXT context, EXCEPTION_REGISTRATION_RECORD** dispatch,
const cxx_function_descr *descr,
@ -90,6 +175,41 @@ static inline void DECLSPEC_NORETURN continue_after_catch( cxx_exception_frame*
for (;;) ; /* unreached */
}
static inline void call_finally_block( void *code_block, void *base_ptr )
{
__asm__ __volatile__ ("movl %1,%%ebp; call *%%eax"
: : "a" (code_block), "g" (base_ptr));
}
static inline int call_filter( int (*func)(PEXCEPTION_POINTERS), void *arg, void *ebp )
{
int ret;
__asm__ __volatile__ ("pushl %%ebp; pushl %3; movl %2,%%ebp; call *%%eax; popl %%ebp; popl %%ebp"
: "=a" (ret)
: "0" (func), "r" (ebp), "r" (arg)
: "ecx", "edx", "memory" );
return ret;
}
static inline int call_unwind_func( int (*func)(void), void *ebp )
{
int ret;
__asm__ __volatile__ ("pushl %%ebp\n\t"
"pushl %%ebx\n\t"
"pushl %%esi\n\t"
"pushl %%edi\n\t"
"movl %2,%%ebp\n\t"
"call *%0\n\t"
"popl %%edi\n\t"
"popl %%esi\n\t"
"popl %%ebx\n\t"
"popl %%ebp"
: "=a" (ret)
: "0" (func), "r" (ebp)
: "ecx", "edx", "memory" );
return ret;
}
static inline void dump_type( const cxx_type_info *type )
{
TRACE( "flags %x type %p %s offsets %d,%d,%d size %d copy ctor %p\n",
@ -496,4 +616,420 @@ unsigned int CDECL __CxxQueryExceptionSize(void)
return sizeof(cxx_exception_type);
}
/*********************************************************************
* _EH_prolog (MSVCRT.@)
*/
/* Provided for VC++ binary compatibility only */
__ASM_GLOBAL_FUNC(_EH_prolog,
__ASM_CFI(".cfi_adjust_cfa_offset 4\n\t") /* skip ret addr */
"pushl $-1\n\t"
__ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
"pushl %eax\n\t"
__ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
"pushl %fs:0\n\t"
__ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
"movl %esp, %fs:0\n\t"
"movl 12(%esp), %eax\n\t"
"movl %ebp, 12(%esp)\n\t"
"leal 12(%esp), %ebp\n\t"
"pushl %eax\n\t"
__ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
"ret")
static const SCOPETABLE_V4 *get_scopetable_v4( MSVCRT_EXCEPTION_FRAME *frame, ULONG_PTR cookie )
{
return (const SCOPETABLE_V4 *)((ULONG_PTR)frame->scopetable ^ cookie);
}
static DWORD MSVCRT_nested_handler(PEXCEPTION_RECORD rec,
EXCEPTION_REGISTRATION_RECORD* frame,
PCONTEXT context,
EXCEPTION_REGISTRATION_RECORD** dispatch)
{
if (!(rec->ExceptionFlags & (EH_UNWINDING | EH_EXIT_UNWIND)))
return ExceptionContinueSearch;
*dispatch = frame;
return ExceptionCollidedUnwind;
}
static void msvcrt_local_unwind2(MSVCRT_EXCEPTION_FRAME* frame, int trylevel, void *ebp)
{
EXCEPTION_REGISTRATION_RECORD reg;
TRACE("(%p,%d,%d)\n",frame, frame->trylevel, trylevel);
/* Register a handler in case of a nested exception */
reg.Handler = MSVCRT_nested_handler;
reg.Prev = NtCurrentTeb()->Tib.ExceptionList;
__wine_push_frame(&reg);
while (frame->trylevel != TRYLEVEL_END && frame->trylevel != trylevel)
{
int level = frame->trylevel;
frame->trylevel = frame->scopetable[level].previousTryLevel;
if (!frame->scopetable[level].lpfnFilter)
{
TRACE( "__try block cleanup level %d handler %p ebp %p\n",
level, frame->scopetable[level].lpfnHandler, ebp );
call_unwind_func( frame->scopetable[level].lpfnHandler, ebp );
}
}
__wine_pop_frame(&reg);
TRACE("unwound OK\n");
}
static void msvcrt_local_unwind4( ULONG *cookie, MSVCRT_EXCEPTION_FRAME* frame, int trylevel, void *ebp )
{
EXCEPTION_REGISTRATION_RECORD reg;
const SCOPETABLE_V4 *scopetable = get_scopetable_v4( frame, *cookie );
TRACE("(%p,%d,%d)\n",frame, frame->trylevel, trylevel);
/* Register a handler in case of a nested exception */
reg.Handler = MSVCRT_nested_handler;
reg.Prev = NtCurrentTeb()->Tib.ExceptionList;
__wine_push_frame(&reg);
while (frame->trylevel != -2 && frame->trylevel != trylevel)
{
int level = frame->trylevel;
frame->trylevel = scopetable->entries[level].previousTryLevel;
if (!scopetable->entries[level].lpfnFilter)
{
TRACE( "__try block cleanup level %d handler %p ebp %p\n",
level, scopetable->entries[level].lpfnHandler, ebp );
call_unwind_func( scopetable->entries[level].lpfnHandler, ebp );
}
}
__wine_pop_frame(&reg);
TRACE("unwound OK\n");
}
/*******************************************************************
* _local_unwind2 (MSVCRT.@)
*/
void CDECL _local_unwind2(MSVCRT_EXCEPTION_FRAME* frame, int trylevel)
{
msvcrt_local_unwind2( frame, trylevel, &frame->_ebp );
}
/*******************************************************************
* _local_unwind4 (MSVCRT.@)
*/
void CDECL _local_unwind4( ULONG *cookie, MSVCRT_EXCEPTION_FRAME* frame, int trylevel )
{
msvcrt_local_unwind4( cookie, frame, trylevel, &frame->_ebp );
}
/*******************************************************************
* _global_unwind2 (MSVCRT.@)
*/
void CDECL _global_unwind2(EXCEPTION_REGISTRATION_RECORD* frame)
{
TRACE("(%p)\n",frame);
RtlUnwind( frame, 0, 0, 0 );
}
/*********************************************************************
* _except_handler2 (MSVCRT.@)
*/
int CDECL _except_handler2(PEXCEPTION_RECORD rec,
EXCEPTION_REGISTRATION_RECORD* frame,
PCONTEXT context,
EXCEPTION_REGISTRATION_RECORD** dispatcher)
{
FIXME("exception %x flags=%x at %p handler=%p %p %p stub\n",
rec->ExceptionCode, rec->ExceptionFlags, rec->ExceptionAddress,
frame->Handler, context, dispatcher);
return ExceptionContinueSearch;
}
/*********************************************************************
* _except_handler3 (MSVCRT.@)
*/
int CDECL _except_handler3(PEXCEPTION_RECORD rec,
MSVCRT_EXCEPTION_FRAME* frame,
PCONTEXT context, void* dispatcher)
{
int retval, trylevel;
EXCEPTION_POINTERS exceptPtrs;
PSCOPETABLE pScopeTable;
TRACE("exception %x flags=%x at %p handler=%p %p %p semi-stub\n",
rec->ExceptionCode, rec->ExceptionFlags, rec->ExceptionAddress,
frame->handler, context, dispatcher);
__asm__ __volatile__ ("cld");
if (rec->ExceptionFlags & (EH_UNWINDING | EH_EXIT_UNWIND))
{
/* Unwinding the current frame */
msvcrt_local_unwind2(frame, TRYLEVEL_END, &frame->_ebp);
TRACE("unwound current frame, returning ExceptionContinueSearch\n");
return ExceptionContinueSearch;
}
else
{
/* Hunting for handler */
exceptPtrs.ExceptionRecord = rec;
exceptPtrs.ContextRecord = context;
*((DWORD *)frame-1) = (DWORD)&exceptPtrs;
trylevel = frame->trylevel;
pScopeTable = frame->scopetable;
while (trylevel != TRYLEVEL_END)
{
TRACE( "level %d prev %d filter %p\n", trylevel, pScopeTable[trylevel].previousTryLevel,
pScopeTable[trylevel].lpfnFilter );
if (pScopeTable[trylevel].lpfnFilter)
{
retval = call_filter( pScopeTable[trylevel].lpfnFilter, &exceptPtrs, &frame->_ebp );
TRACE("filter returned %s\n", retval == EXCEPTION_CONTINUE_EXECUTION ?
"CONTINUE_EXECUTION" : retval == EXCEPTION_EXECUTE_HANDLER ?
"EXECUTE_HANDLER" : "CONTINUE_SEARCH");
if (retval == EXCEPTION_CONTINUE_EXECUTION)
return ExceptionContinueExecution;
if (retval == EXCEPTION_EXECUTE_HANDLER)
{
/* Unwind all higher frames, this one will handle the exception */
_global_unwind2((EXCEPTION_REGISTRATION_RECORD*)frame);
msvcrt_local_unwind2(frame, trylevel, &frame->_ebp);
/* Set our trylevel to the enclosing block, and call the __finally
* code, which won't return
*/
frame->trylevel = pScopeTable[trylevel].previousTryLevel;
TRACE("__finally block %p\n",pScopeTable[trylevel].lpfnHandler);
call_finally_block(pScopeTable[trylevel].lpfnHandler, &frame->_ebp);
ERR("Returned from __finally block - expect crash!\n");
}
}
trylevel = pScopeTable[trylevel].previousTryLevel;
}
}
TRACE("reached TRYLEVEL_END, returning ExceptionContinueSearch\n");
return ExceptionContinueSearch;
}
/*********************************************************************
* _except_handler4_common (MSVCRT.@)
*/
int CDECL _except_handler4_common( ULONG *cookie, void (*check_cookie)(void),
EXCEPTION_RECORD *rec, MSVCRT_EXCEPTION_FRAME *frame,
CONTEXT *context, EXCEPTION_REGISTRATION_RECORD **dispatcher )
{
int retval, trylevel;
EXCEPTION_POINTERS exceptPtrs;
const SCOPETABLE_V4 *scope_table = get_scopetable_v4( frame, *cookie );
TRACE( "exception %x flags=%x at %p handler=%p %p %p cookie=%x scope table=%p cookies=%d/%x,%d/%x\n",
rec->ExceptionCode, rec->ExceptionFlags, rec->ExceptionAddress,
frame->handler, context, dispatcher, *cookie, scope_table,
scope_table->gs_cookie_offset, scope_table->gs_cookie_xor,
scope_table->eh_cookie_offset, scope_table->eh_cookie_xor );
/* FIXME: no cookie validation yet */
if (rec->ExceptionFlags & (EH_UNWINDING | EH_EXIT_UNWIND))
{
/* Unwinding the current frame */
msvcrt_local_unwind4( cookie, frame, -2, &frame->_ebp );
TRACE("unwound current frame, returning ExceptionContinueSearch\n");
return ExceptionContinueSearch;
}
else
{
/* Hunting for handler */
exceptPtrs.ExceptionRecord = rec;
exceptPtrs.ContextRecord = context;
*((DWORD *)frame-1) = (DWORD)&exceptPtrs;
trylevel = frame->trylevel;
while (trylevel != -2)
{
TRACE( "level %d prev %d filter %p\n", trylevel,
scope_table->entries[trylevel].previousTryLevel,
scope_table->entries[trylevel].lpfnFilter );
if (scope_table->entries[trylevel].lpfnFilter)
{
retval = call_filter( scope_table->entries[trylevel].lpfnFilter, &exceptPtrs, &frame->_ebp );
TRACE("filter returned %s\n", retval == EXCEPTION_CONTINUE_EXECUTION ?
"CONTINUE_EXECUTION" : retval == EXCEPTION_EXECUTE_HANDLER ?
"EXECUTE_HANDLER" : "CONTINUE_SEARCH");
if (retval == EXCEPTION_CONTINUE_EXECUTION)
return ExceptionContinueExecution;
if (retval == EXCEPTION_EXECUTE_HANDLER)
{
/* Unwind all higher frames, this one will handle the exception */
_global_unwind2((EXCEPTION_REGISTRATION_RECORD*)frame);
msvcrt_local_unwind4( cookie, frame, trylevel, &frame->_ebp );
/* Set our trylevel to the enclosing block, and call the __finally
* code, which won't return
*/
frame->trylevel = scope_table->entries[trylevel].previousTryLevel;
TRACE("__finally block %p\n",scope_table->entries[trylevel].lpfnHandler);
call_finally_block(scope_table->entries[trylevel].lpfnHandler, &frame->_ebp);
ERR("Returned from __finally block - expect crash!\n");
}
}
trylevel = scope_table->entries[trylevel].previousTryLevel;
}
}
TRACE("reached -2, returning ExceptionContinueSearch\n");
return ExceptionContinueSearch;
}
/*
* setjmp/longjmp implementation
*/
#define MSVCRT_JMP_MAGIC 0x56433230 /* ID value for new jump structure */
typedef void (__stdcall *MSVCRT_unwind_function)(const struct MSVCRT___JUMP_BUFFER *);
/* define an entrypoint for setjmp/setjmp3 that stores the registers in the jmp buf */
/* and then jumps to the C backend function */
#define DEFINE_SETJMP_ENTRYPOINT(name) \
__ASM_GLOBAL_FUNC( name, \
"movl 4(%esp),%ecx\n\t" /* jmp_buf */ \
"movl %ebp,0(%ecx)\n\t" /* jmp_buf.Ebp */ \
"movl %ebx,4(%ecx)\n\t" /* jmp_buf.Ebx */ \
"movl %edi,8(%ecx)\n\t" /* jmp_buf.Edi */ \
"movl %esi,12(%ecx)\n\t" /* jmp_buf.Esi */ \
"movl %esp,16(%ecx)\n\t" /* jmp_buf.Esp */ \
"movl 0(%esp),%eax\n\t" \
"movl %eax,20(%ecx)\n\t" /* jmp_buf.Eip */ \
"jmp " __ASM_NAME("__regs_") # name )
/* restore the registers from the jmp buf upon longjmp */
extern void DECLSPEC_NORETURN longjmp_set_regs( struct MSVCRT___JUMP_BUFFER *jmp, int retval );
__ASM_GLOBAL_FUNC( longjmp_set_regs,
"movl 4(%esp),%ecx\n\t" /* jmp_buf */
"movl 8(%esp),%eax\n\t" /* retval */
"movl 0(%ecx),%ebp\n\t" /* jmp_buf.Ebp */
"movl 4(%ecx),%ebx\n\t" /* jmp_buf.Ebx */
"movl 8(%ecx),%edi\n\t" /* jmp_buf.Edi */
"movl 12(%ecx),%esi\n\t" /* jmp_buf.Esi */
"movl 16(%ecx),%esp\n\t" /* jmp_buf.Esp */
"addl $4,%esp\n\t" /* get rid of return address */
"jmp *20(%ecx)\n\t" /* jmp_buf.Eip */ )
/*
* The signatures of the setjmp/longjmp functions do not match that
* declared in the setjmp header so they don't follow the regular naming
* convention to avoid conflicts.
*/
/*******************************************************************
* _setjmp (MSVCRT.@)
*/
DEFINE_SETJMP_ENTRYPOINT(MSVCRT__setjmp)
int CDECL __regs_MSVCRT__setjmp(struct MSVCRT___JUMP_BUFFER *jmp)
{
jmp->Registration = (unsigned long)NtCurrentTeb()->Tib.ExceptionList;
if (jmp->Registration == ~0UL)
jmp->TryLevel = TRYLEVEL_END;
else
jmp->TryLevel = ((MSVCRT_EXCEPTION_FRAME*)jmp->Registration)->trylevel;
TRACE("buf=%p ebx=%08lx esi=%08lx edi=%08lx ebp=%08lx esp=%08lx eip=%08lx frame=%08lx\n",
jmp, jmp->Ebx, jmp->Esi, jmp->Edi, jmp->Ebp, jmp->Esp, jmp->Eip, jmp->Registration );
return 0;
}
/*******************************************************************
* _setjmp3 (MSVCRT.@)
*/
DEFINE_SETJMP_ENTRYPOINT( MSVCRT__setjmp3 )
int CDECL __regs_MSVCRT__setjmp3(struct MSVCRT___JUMP_BUFFER *jmp, int nb_args, ...)
{
jmp->Cookie = MSVCRT_JMP_MAGIC;
jmp->UnwindFunc = 0;
jmp->Registration = (unsigned long)NtCurrentTeb()->Tib.ExceptionList;
if (jmp->Registration == ~0UL)
{
jmp->TryLevel = TRYLEVEL_END;
}
else
{
int i;
va_list args;
va_start( args, nb_args );
if (nb_args > 0) jmp->UnwindFunc = va_arg( args, unsigned long );
if (nb_args > 1) jmp->TryLevel = va_arg( args, unsigned long );
else jmp->TryLevel = ((MSVCRT_EXCEPTION_FRAME*)jmp->Registration)->trylevel;
for (i = 0; i < 6 && i < nb_args - 2; i++)
jmp->UnwindData[i] = va_arg( args, unsigned long );
va_end( args );
}
TRACE("buf=%p ebx=%08lx esi=%08lx edi=%08lx ebp=%08lx esp=%08lx eip=%08lx frame=%08lx\n",
jmp, jmp->Ebx, jmp->Esi, jmp->Edi, jmp->Ebp, jmp->Esp, jmp->Eip, jmp->Registration );
return 0;
}
/*********************************************************************
* longjmp (MSVCRT.@)
*/
void CDECL MSVCRT_longjmp(struct MSVCRT___JUMP_BUFFER *jmp, int retval)
{
unsigned long cur_frame = 0;
TRACE("buf=%p ebx=%08lx esi=%08lx edi=%08lx ebp=%08lx esp=%08lx eip=%08lx frame=%08lx retval=%08x\n",
jmp, jmp->Ebx, jmp->Esi, jmp->Edi, jmp->Ebp, jmp->Esp, jmp->Eip, jmp->Registration, retval );
cur_frame=(unsigned long)NtCurrentTeb()->Tib.ExceptionList;
TRACE("cur_frame=%lx\n",cur_frame);
if (cur_frame != jmp->Registration)
_global_unwind2((EXCEPTION_REGISTRATION_RECORD*)jmp->Registration);
if (jmp->Registration)
{
if (!IsBadReadPtr(&jmp->Cookie, sizeof(long)) &&
jmp->Cookie == MSVCRT_JMP_MAGIC && jmp->UnwindFunc)
{
MSVCRT_unwind_function unwind_func;
unwind_func=(MSVCRT_unwind_function)jmp->UnwindFunc;
unwind_func(jmp);
}
else
msvcrt_local_unwind2((MSVCRT_EXCEPTION_FRAME*)jmp->Registration,
jmp->TryLevel, (void *)jmp->Ebp);
}
if (!retval)
retval = 1;
longjmp_set_regs( jmp, retval );
}
/*********************************************************************
* _seh_longjmp_unwind (MSVCRT.@)
*/
void __stdcall _seh_longjmp_unwind(struct MSVCRT___JUMP_BUFFER *jmp)
{
msvcrt_local_unwind2( (MSVCRT_EXCEPTION_FRAME *)jmp->Registration, jmp->TryLevel, (void *)jmp->Ebp );
}
/*********************************************************************
* _seh_longjmp_unwind4 (MSVCRT.@)
*/
void __stdcall _seh_longjmp_unwind4(struct MSVCRT___JUMP_BUFFER *jmp)
{
msvcrt_local_unwind4( (void *)jmp->Cookie, (MSVCRT_EXCEPTION_FRAME *)jmp->Registration,
jmp->TryLevel, (void *)jmp->Ebp );
}
#endif /* __i386__ */