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ntdll: Implemented RtlLookupFunctionEntry for x86_64.

This commit is contained in:
Alexandre Julliard 2009-05-22 11:48:30 +02:00
parent bced77fb07
commit 7634ce154a
1 changed files with 46 additions and 4 deletions
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50
dlls/ntdll/signal_x86_64.c
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@ -619,6 +619,31 @@ NTSTATUS context_from_server( CONTEXT *to, const context_t *from )
}
/**********************************************************************
* find_function_info
*/
static RUNTIME_FUNCTION *find_function_info( ULONG64 pc, HMODULE module,
RUNTIME_FUNCTION *func, ULONG size )
{
int min = 0;
int max = size/sizeof(*func) - 1;
while (min <= max)
{
int pos = (min + max) / 2;
if ((char *)pc < (char *)module + func[pos].BeginAddress) max = pos - 1;
else if ((char *)pc >= (char *)module + func[pos].EndAddress) min = pos + 1;
else
{
func += pos;
while (func->UnwindData & 1) /* follow chained entry */
func = (RUNTIME_FUNCTION *)((char *)module + (func->UnwindData & ~1));
return func;
}
}
return NULL;
}
/**********************************************************************
* call_stack_handlers
*
@ -1019,11 +1044,28 @@ void signal_init_process(void)
/**********************************************************************
* RtlLookupFunctionEntry (NTDLL.@)
*/
PRUNTIME_FUNCTION WINAPI RtlLookupFunctionEntry( ULONG64 pc, ULONG64 *base,
UNWIND_HISTORY_TABLE *table )
PRUNTIME_FUNCTION WINAPI RtlLookupFunctionEntry( ULONG64 pc, ULONG64 *base, UNWIND_HISTORY_TABLE *table )
{
FIXME("stub\n");
return NULL;
LDR_MODULE *module;
RUNTIME_FUNCTION *func;
ULONG size;
/* FIXME: should use the history table to make things faster */
if (LdrFindEntryForAddress( (void *)pc, &module ))
{
WARN( "module not found for %lx\n", pc );
return NULL;
}
if (!(func = RtlImageDirectoryEntryToData( module->BaseAddress, TRUE,
IMAGE_DIRECTORY_ENTRY_EXCEPTION, &size )))
{
WARN( "no exception table found in module %p pc %lx\n", module->BaseAddress, pc );
return NULL;
}
func = find_function_info( pc, module->BaseAddress, func, size );
if (func) *base = (ULONG64)module->BaseAddress;
return func;
}
static ULONG64 get_int_reg( CONTEXT *context, int reg )