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wine-staging/patches/ntdll-HashLinks/0001-ntdll-Implement-HashLinks-field-in-LDR-module-data.patch

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From c1c2b51e391501ebf09816dfd6783bc648a44c1c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Michael=20M=C3=BCller?= <michael@fds-team.de>
Date: Mon, 3 Apr 2017 05:30:27 +0200
Subject: [PATCH] ntdll: Implement HashLinks field in LDR module data.
---
dlls/kernel32/tests/loader.c | 76 ++++++++++++++++++++++++++++++++++++
dlls/ntdll/loader.c | 65 ++++++++++++++++++++++++++++++
include/winternl.h | 2 +-
3 files changed, 142 insertions(+), 1 deletion(-)
diff --git a/dlls/kernel32/tests/loader.c b/dlls/kernel32/tests/loader.c
index 35c6b3c0996..17d742daaa7 100644
--- a/dlls/kernel32/tests/loader.c
+++ b/dlls/kernel32/tests/loader.c
@@ -30,6 +30,7 @@
#include "winbase.h"
#include "winternl.h"
#include "winnls.h"
+#include "winuser.h"
#include "wine/test.h"
#include "delayloadhandler.h"
@@ -3934,6 +3935,79 @@ static void test_LoadPackagedLibrary(void)
h, GetLastError());
}
+static inline WCHAR toupperW(WCHAR c)
+{
+ WCHAR tmp = c;
+ CharUpperBuffW(&tmp, 1);
+ return tmp;
+}
+
+static ULONG hash_basename(const WCHAR *basename)
+{
+ WORD version = MAKEWORD(NtCurrentTeb()->Peb->OSMinorVersion,
+ NtCurrentTeb()->Peb->OSMajorVersion);
+ ULONG hash = 0;
+
+ if (version >= 0x0602)
+ {
+ for (; *basename; basename++)
+ hash = hash * 65599 + toupperW(*basename);
+ }
+ else if (version == 0x0601)
+ {
+ for (; *basename; basename++)
+ hash = hash + 65599 * toupperW(*basename);
+ }
+ else
+ hash = toupperW(basename[0]) - 'A';
+
+ return hash & 31;
+}
+
+static void test_HashLinks(void)
+{
+ static WCHAR ntdllW[] = {'n','t','d','l','l','.','d','l','l',0};
+ static WCHAR kernel32W[] = {'k','e','r','n','e','l','3','2','.','d','l','l',0};
+
+ LIST_ENTRY *hash_map, *entry, *mark;
+ LDR_MODULE *module;
+ BOOL found;
+
+ entry = &NtCurrentTeb()->Peb->LdrData->InLoadOrderModuleList;
+ entry = entry->Flink;
+
+ module = CONTAINING_RECORD(entry, LDR_MODULE, InLoadOrderModuleList);
+ entry = module->HashLinks.Blink;
+
+ hash_map = entry - hash_basename(module->BaseDllName.Buffer);
+
+ mark = &hash_map[hash_basename(ntdllW)];
+ found = FALSE;
+ for (entry = mark->Flink; entry != mark; entry = entry->Flink)
+ {
+ module = CONTAINING_RECORD(entry, LDR_MODULE, HashLinks);
+ if (!lstrcmpiW(module->BaseDllName.Buffer, ntdllW))
+ {
+ found = TRUE;
+ break;
+ }
+ }
+ ok(found, "Could not find ntdll\n");
+
+ mark = &hash_map[hash_basename(kernel32W)];
+ found = FALSE;
+ for (entry = mark->Flink; entry != mark; entry = entry->Flink)
+ {
+ module = CONTAINING_RECORD(entry, LDR_MODULE, HashLinks);
+ if (!lstrcmpiW(module->BaseDllName.Buffer, kernel32W))
+ {
+ found = TRUE;
+ break;
+ }
+ }
+ ok(found, "Could not find kernel32\n");
+}
+
START_TEST(loader)
{
int argc;
@@ -4006,10 +4080,12 @@ START_TEST(loader)
test_InMemoryOrderModuleList();
test_LoadPackagedLibrary();
test_wow64_redirection();
+ test_HashLinks();
test_dll_file( "ntdll.dll" );
test_dll_file( "kernel32.dll" );
test_dll_file( "advapi32.dll" );
test_dll_file( "user32.dll" );
+
/* loader test must be last, it can corrupt the internal loader state on Windows */
test_Loader();
}
diff --git a/dlls/ntdll/loader.c b/dlls/ntdll/loader.c
index 0568be63ad8..004d31f9367 100644
--- a/dlls/ntdll/loader.c
+++ b/dlls/ntdll/loader.c
@@ -118,6 +118,9 @@ static const char * const reason_names[] =
static const WCHAR dllW[] = {'.','d','l','l',0};
+#define HASH_MAP_SIZE 32
+static LIST_ENTRY hash_table[HASH_MAP_SIZE];
+
/* internal representation of 32bit modules. per process. */
typedef struct _wine_modref
{
@@ -458,6 +461,52 @@ static void call_ldr_notifications( ULONG reason, LDR_MODULE *module )
}
}
+/*************************************************************************
+ * hash_basename
+ *
+ * Calculates the bucket index of a dll using the basename.
+ */
+static ULONG hash_basename(const WCHAR *basename)
+{
+ WORD version = MAKEWORD(NtCurrentTeb()->Peb->OSMinorVersion,
+ NtCurrentTeb()->Peb->OSMajorVersion);
+ ULONG hash = 0;
+
+ if (version >= 0x0602)
+ {
+ for (; *basename; basename++)
+ hash = hash * 65599 + towupper(*basename);
+ }
+ else if (version == 0x0601)
+ {
+ for (; *basename; basename++)
+ hash = hash + 65599 * towupper(*basename);
+ }
+ else
+ hash = towupper(basename[0]) - 'A';
+
+ return hash & (HASH_MAP_SIZE-1);
+}
+
+/*************************************************************************
+ * recompute_hash_maps
+ *
+ * Recomputes the LDR hash map (necessary when windows version changes).
+ */
+static void recompute_hash_map(void)
+{
+ PLIST_ENTRY mark, entry;
+ PLDR_MODULE mod;
+
+ mark = &NtCurrentTeb()->Peb->LdrData->InLoadOrderModuleList;
+ for (entry = mark->Flink; entry != mark; entry = entry->Flink)
+ {
+ mod = CONTAINING_RECORD(entry, LDR_MODULE, InLoadOrderModuleList);
+ RemoveEntryList( &mod->HashLinks );
+ InsertTailList( &hash_table[hash_basename(mod->BaseDllName.Buffer)], &mod->HashLinks );
+ }
+}
+
/*************************************************************************
* get_modref
*
@@ -1216,7 +1265,12 @@ static WINE_MODREF *alloc_module( HMODULE hModule, const UNICODE_STRING *nt_name
&wm->ldr.InLoadOrderModuleList);
InsertTailList(&NtCurrentTeb()->Peb->LdrData->InMemoryOrderModuleList,
&wm->ldr.InMemoryOrderModuleList);
+ InsertTailList(&hash_table[hash_basename(wm->ldr.BaseDllName.Buffer)],
+ &wm->ldr.HashLinks);
+
/* wait until init is called for inserting into InInitializationOrderModuleList */
+ wm->ldr.InInitializationOrderModuleList.Flink = NULL;
+ wm->ldr.InInitializationOrderModuleList.Blink = NULL;
if (!(nt->OptionalHeader.DllCharacteristics & IMAGE_DLLCHARACTERISTICS_NX_COMPAT))
{
@@ -2015,6 +2069,7 @@ static NTSTATUS build_so_dll_module( const WCHAR *load_path, const UNICODE_STRIN
/* the module has only been inserted in the load & memory order lists */
RemoveEntryList(&wm->ldr.InLoadOrderModuleList);
RemoveEntryList(&wm->ldr.InMemoryOrderModuleList);
+ RemoveEntryList(&wm->ldr.HashLinks);
/* FIXME: free the modref */
return status;
}
@@ -2565,6 +2620,7 @@ static NTSTATUS load_native_dll( LPCWSTR load_path, const UNICODE_STRING *nt_nam
/* the module has only be inserted in the load & memory order lists */
RemoveEntryList(&wm->ldr.InLoadOrderModuleList);
RemoveEntryList(&wm->ldr.InMemoryOrderModuleList);
+ RemoveEntryList(&wm->ldr.HashLinks);
/* FIXME: there are several more dangling references
* left. Including dlls loaded by this dll before the
@@ -3783,6 +3839,7 @@ static void free_modref( WINE_MODREF *wm )
{
RemoveEntryList(&wm->ldr.InLoadOrderModuleList);
RemoveEntryList(&wm->ldr.InMemoryOrderModuleList);
+ RemoveEntryList(&wm->ldr.HashLinks);
if (wm->ldr.InInitializationOrderModuleList.Flink)
RemoveEntryList(&wm->ldr.InInitializationOrderModuleList);
@@ -4476,6 +4533,7 @@ void __wine_process_init(void)
SIZE_T info_size;
TEB *teb = thread_init();
PEB *peb = teb->Peb;
+ DWORD i;
/* setup the server connection */
server_init_process();
@@ -4497,6 +4555,10 @@ void __wine_process_init(void)
load_global_options();
version_init();
+ /* initialize hash table */
+ for (i = 0; i < HASH_MAP_SIZE; i++)
+ InitializeListHead(&hash_table[i]);
+
/* setup the load callback and create ntdll modref */
RtlInitUnicodeString( &nt_name, ntdllW );
default_load_info.filename = &nt_name;
@@ -4571,5 +4633,8 @@ void __wine_process_init(void)
teb->Tib.StackLimit = stack.StackLimit;
teb->DeallocationStack = stack.DeallocationStack;
+ /* the windows version was not set yet when ntdll and kernel32 were loaded */
+ recompute_hash_map();
+
server_init_process_done();
}
diff --git a/include/winternl.h b/include/winternl.h
index b77ab8fe03a..3d4863d8b04 100644
--- a/include/winternl.h
+++ b/include/winternl.h
@@ -2268,8 +2268,8 @@ typedef struct _LDR_MODULE
ULONG Flags;
SHORT LoadCount;
SHORT TlsIndex;
- HANDLE SectionHandle;
ULONG CheckSum;
+ LIST_ENTRY HashLinks;
ULONG TimeDateStamp;
HANDLE ActivationContext;
PVOID PatchInformation;
--
2.26.0
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