[reactos] 02/04: [LDR] Add initial LOAD_CONFIG support

[Mark Jansen]

https://git.reactos.org/?p=reactos.git;a=commitdiff;h=1e0f359fa7b5ff8cc535b…

commit 1e0f359fa7b5ff8cc535b6c0b5b75fa6bdb7c76d
Author:     Mark Jansen <mark.jansen(a)reactos.org>
AuthorDate: Sun Apr 12 16:24:28 2020 +0200
Commit:     Mark Jansen <mark.jansen(a)reactos.org>
CommitDate: Fri Apr 17 17:47:24 2020 +0200

    [LDR] Add initial LOAD_CONFIG support
---
 dll/ntdll/ldr/ldrinit.c | 35 ++++++++++++++++++++++++++++++++---
 1 file changed, 32 insertions(+), 3 deletions(-)

diff --git a/dll/ntdll/ldr/ldrinit.c b/dll/ntdll/ldr/ldrinit.c
index 955c9a23b8c..cdf51c64b38 100644
--- a/dll/ntdll/ldr/ldrinit.c
+++ b/dll/ntdll/ldr/ldrinit.c
@@ -1872,11 +1872,40 @@ LdrpInitializeProcess(IN PCONTEXT Context,
     HeapParameters.Length = sizeof(HeapParameters);
 
     /* Check if we have Configuration Data */
-    if ((LoadConfig) && (ConfigSize == sizeof(IMAGE_LOAD_CONFIG_DIRECTORY)))
+#define VALID_CONFIG_FIELD(Name) (ConfigSize >=
(FIELD_OFFSET(IMAGE_LOAD_CONFIG_DIRECTORY, Name) + sizeof(LoadConfig->Name)))
+    /* The 'original' load config ends after SecurityCookie */
+    if ((LoadConfig) && ConfigSize && (VALID_CONFIG_FIELD(SecurityCookie)
|| ConfigSize == LoadConfig->Size))
     {
-        /* FIXME: Custom heap settings and misc. */
-        DPRINT1("We don't support LOAD_CONFIG data yet\n");
+        if (ConfigSize != sizeof(IMAGE_LOAD_CONFIG_DIRECTORY))
+            DPRINT1("WARN: Accepting different LOAD_CONFIG size!\n");
+        else
+            DPRINT1("Applying LOAD_CONFIG\n");
+
+        if (VALID_CONFIG_FIELD(GlobalFlagsSet) && LoadConfig->GlobalFlagsSet)
+            Peb->NtGlobalFlag |= LoadConfig->GlobalFlagsSet;
+
+        if (VALID_CONFIG_FIELD(GlobalFlagsClear) &&
LoadConfig->GlobalFlagsClear)
+            Peb->NtGlobalFlag &= ~LoadConfig->GlobalFlagsClear;
+
+        if (VALID_CONFIG_FIELD(CriticalSectionDefaultTimeout) &&
LoadConfig->CriticalSectionDefaultTimeout)
+            RtlpTimeout.QuadPart =
Int32x32To64(LoadConfig->CriticalSectionDefaultTimeout, -10000000);
+
+        if (VALID_CONFIG_FIELD(DeCommitFreeBlockThreshold) &&
LoadConfig->DeCommitFreeBlockThreshold)
+            HeapParameters.DeCommitFreeBlockThreshold =
LoadConfig->DeCommitFreeBlockThreshold;
+
+        if (VALID_CONFIG_FIELD(DeCommitTotalFreeThreshold) &&
LoadConfig->DeCommitTotalFreeThreshold)
+            HeapParameters.DeCommitTotalFreeThreshold =
LoadConfig->DeCommitTotalFreeThreshold;
+
+        if (VALID_CONFIG_FIELD(MaximumAllocationSize) &&
LoadConfig->MaximumAllocationSize)
+            HeapParameters.MaximumAllocationSize = LoadConfig->MaximumAllocationSize;
+
+        if (VALID_CONFIG_FIELD(VirtualMemoryThreshold) &&
LoadConfig->VirtualMemoryThreshold)
+            HeapParameters.VirtualMemoryThreshold =
LoadConfig->VirtualMemoryThreshold;
+
+        if (VALID_CONFIG_FIELD(ProcessHeapFlags) &&
LoadConfig->ProcessHeapFlags)
+            HeapFlags = LoadConfig->ProcessHeapFlags;
     }
+#undef VALID_CONFIG_FIELD
 
     /* Check for custom affinity mask */
     if (Peb->ImageProcessAffinityMask)