[PATCH 0/1] MR7803: kernel32: Add export for CreateFileMapping2.

[Etaash Mathamsetty (＠etaash.mathamsetty)]

Rainbow Six Siege checks if the export exists but then doesn't actually use it

[PATCH 1/1] kernel32: Add export for CreateFileMapping2.

[Etaash Mathamsetty]

From: Etaash Mathamsetty

---
 dlls/kernel32/kernel32.spec     | 1 +
 dlls/kernelbase/kernelbase.spec | 1 +
 2 files changed, 2 insertions(+)

diff --git a/dlls/kernel32/kernel32.spec b/dlls/kernel32/kernel32.spec
index caa6c92b653..fd1704c99ae 100644
--- a/dlls/kernel32/kernel32.spec
+++ b/dlls/kernel32/kernel32.spec
@@ -286,6 +286,7 @@
 @ stdcall -import CreateFile2(wstr long long long ptr)
 @ stdcall -import CreateFileA(str long long ptr long long long)
 @ stdcall CreateFileTransactedA(str long long ptr long long long ptr ptr ptr)
+@ stub CreateFileMapping2
 @ stdcall CreateFileMappingA(long ptr long long long str)
 # @ stub CreateFileMappingNumaA
 @ stdcall CreateFileMappingFromApp(long ptr long int64 wstr) kernelbase.CreateFileMappingFromApp
diff --git a/dlls/kernelbase/kernelbase.spec b/dlls/kernelbase/kernelbase.spec
index daab63e85e2..99b263f1e1f 100644
--- a/dlls/kernelbase/kernelbase.spec
+++ b/dlls/kernelbase/kernelbase.spec
@@ -192,6 +192,7 @@
 @ stdcall CreateFiberEx(long long long ptr ptr)
 @ stdcall CreateFile2(wstr long long long ptr)
 @ stdcall CreateFileA(str long long ptr long long long)
+@ stub CreateFileMapping2
 @ stdcall CreateFileMappingFromApp(long ptr long int64 wstr)
 @ stdcall CreateFileMappingNumaW(long ptr long long long wstr long)
 @ stdcall CreateFileMappingW(long ptr long long long wstr)

[Paul Gofman (＠gofman)]

Does this stub actually improves anything in the game behaviour? Otherwise if it just queries it that probably doesn't justify adding a spec (or empty coded) stub, it is better to have some implementation at once.

[Etaash Mathamsetty (＠etaash.mathamsetty)]

On Mon Apr 14 15:14:49 2025 +0000, Paul Gofman wrote:
> Does this stub actually improves anything in the game behaviour?
> Otherwise if it just queries it that probably doesn't justify adding a
> spec (or empty coded) stub, it is better to have some implementation at once.

it improves the behavior by allowing the game to launch (it doesn't launch without this export present)

[Dahipppo1555 (＠Dahipppo1555)]

On Thu Apr 17 16:29:39 2025 +0000, Etaash Mathamsetty wrote:
> it improves the behavior by allowing the game to launch (it doesn't
> launch without this export present)

can confirm. without stub it just gives this error:
`The procedure entry point CreateFileMapping2 could not be located in the dynamic link library api-ms-win-core-memory-l1-1-7.dll`

[PATCH 0/1] MR7803: kernel32: Add export for CreateFileMapping2. - closed

[Etaash Mathamsetty (＠etaash.mathamsetty)]

This merge request was closed by Etaash Mathamsetty.

[Juan Islando (＠techj75)]

Is this fixed by a different PR? I'm running into this issue as well.

[Juan Islando (＠techj75)]

On Thu Apr 17 16:27:25 2025 +0000, Dahipppo1555 wrote:
> can confirm. without stub it just gives this error:
> `The procedure entry point CreateFileMapping2 could not be located in
> the dynamic link library api-ms-win-core-memory-l1-1-7.dll`

Did you find any other workaround? I'm getting this in Crossover.

[Nikolay Sivov (＠nsivov)]

On Sat May 24 16:46:03 2025 +0000, Juan Islando wrote:
> Is this fixed by a different PR? I'm running into this issue as well.

This was fixed with 177ed29851f74a26331b6a14ae84c4dbce4f0d70.