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kernelbase: Use ProcessWow64Information to retrieve the 32-bit PEB.

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This commit is contained in:
Alexandre Julliard 2023-07-11 14:14:33 +02:00
parent b1f603d8bc
commit 7261aca185
1 changed files with 30 additions and 28 deletions
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58
dlls/kernelbase/debug.c
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@ -824,37 +824,39 @@ struct module_iterator
};
/* Caller must ensure that wow64=TRUE is only passed from 64bit for 'process' being a wow64 process */
static BOOL init_module_iterator( struct module_iterator *iter, HANDLE process, BOOL wow64 )
static BOOL init_module_iterator_wow64( struct module_iterator *iter, HANDLE process )
{
PEB_LDR_DATA32 *ldr_data32_ptr;
DWORD ldr_data32, first_module;
PEB32 *peb32;
iter->wow64 = TRUE;
if (!set_ntstatus( NtQueryInformationProcess( process, ProcessWow64Information,
&peb32, sizeof(peb32), NULL )))
return FALSE;
if (!ReadProcessMemory( process, &peb32->LdrData, &ldr_data32, sizeof(ldr_data32), NULL ))
return FALSE;
ldr_data32_ptr = (PEB_LDR_DATA32 *)(DWORD_PTR) ldr_data32;
if (!ReadProcessMemory( process, &ldr_data32_ptr->InLoadOrderModuleList.Flink,
&first_module, sizeof(first_module), NULL ))
return FALSE;
iter->head = (LIST_ENTRY *)&ldr_data32_ptr->InLoadOrderModuleList;
iter->current = (LIST_ENTRY *)(DWORD_PTR)first_module;
iter->process = process;
return TRUE;
}
static BOOL init_module_iterator( struct module_iterator *iter, HANDLE process )
{
PROCESS_BASIC_INFORMATION pbi;
PPEB_LDR_DATA ldr_data;
/* get address of PEB */
iter->wow64 = FALSE;
if (!set_ntstatus( NtQueryInformationProcess( process, ProcessBasicInformation,
&pbi, sizeof(pbi), NULL )))
return FALSE;
iter->wow64 = wow64;
if (wow64)
{
PEB_LDR_DATA32 *ldr_data32_ptr;
DWORD ldr_data32, first_module;
PEB32 *peb32;
peb32 = (PEB32 *)((char *)pbi.PebBaseAddress + 0x1000);
if (!ReadProcessMemory( process, &peb32->LdrData, &ldr_data32, sizeof(ldr_data32), NULL ))
return FALSE;
ldr_data32_ptr = (PEB_LDR_DATA32 *)(DWORD_PTR) ldr_data32;
if (!ReadProcessMemory( process, &ldr_data32_ptr->InLoadOrderModuleList.Flink,
&first_module, sizeof(first_module), NULL ))
return FALSE;
iter->head = (LIST_ENTRY *)&ldr_data32_ptr->InLoadOrderModuleList;
iter->current = (LIST_ENTRY *)(DWORD_PTR)first_module;
iter->process = process;
return TRUE;
}
/* read address of LdrData from PEB */
if (!ReadProcessMemory( process, &pbi.PebBaseAddress->LdrData, &ldr_data, sizeof(ldr_data), NULL ))
return FALSE;
@ -907,7 +909,7 @@ static BOOL get_ldr_module( HANDLE process, HMODULE module, LDR_DATA_TABLE_ENTRY
struct module_iterator iter;
INT ret;
if (!init_module_iterator( &iter, process, FALSE )) return FALSE;
if (!init_module_iterator( &iter, process )) return FALSE;
while ((ret = module_iterator_next( &iter )) > 0)
/* When hModule is NULL we return the process image - which will be
@ -935,7 +937,7 @@ static BOOL get_ldr_module32( HANDLE process, HMODULE module, LDR_DATA_TABLE_ENT
return FALSE;
}
#endif
if (!init_module_iterator( &iter, process, TRUE )) return FALSE;
if (!init_module_iterator_wow64( &iter, process )) return FALSE;
while ((ret = module_iterator_next( &iter )) > 0)
/* When hModule is NULL we return the process image - which will be
@ -1101,12 +1103,12 @@ BOOL WINAPI EnumProcessModulesEx( HANDLE process, HMODULE *module, DWORD count,
if (is_win64 && target_wow64 && (list_mode & LIST_MODULES_32BIT))
{
if (!init_module_iterator( &iter, process, TRUE ) || module_push_all( &mp, &iter ) < 0)
if (!init_module_iterator_wow64( &iter, process ) || module_push_all( &mp, &iter ) < 0)
return FALSE;
}
if (!(is_win64 && list_mode == LIST_MODULES_32BIT))
{
if (init_module_iterator( &iter, process, FALSE ))
if (init_module_iterator( &iter, process ))
{
if (is_win64 && target_wow64 && (list_mode & LIST_MODULES_64BIT))
/* Don't add main module twice in _ALL mode */
@ -1120,7 +1122,7 @@ BOOL WINAPI EnumProcessModulesEx( HANDLE process, HMODULE *module, DWORD count,
*/
if (list_mode == LIST_MODULES_DEFAULT)
{
if (init_module_iterator( &iter, process, TRUE ) && module_iterator_next( &iter ) > 0)
if (init_module_iterator_wow64( &iter, process ) && module_iterator_next( &iter ) > 0)
module_push_iter( &mp, &iter );
else
ret = -1;