From: Vijay Kiran Kamuju <infyquest@gmail.com>
Subject: [PATCH] ntdll: Implement RtlGetCallersAddress function.
Message-Id: <CACfa+KJykOfA1ZXgL2pM85H3=L8nv1WCou4Cf7S5_cHo7HVxmw@mail.gmail.com>
Date: Sun, 14 Mar 2021 17:48:11 +0100

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=50726

Signed-off-by: Vijay Kiran Kamuju <infyquest@gmail.com>

<div dir="ltr">Wine-Bug: <a href="https://bugs.winehq.org/show_bug.cgi?id=50726">https://bugs.winehq.org/show_bug.cgi?id=50726</a><br><br>Signed-off-by: Vijay Kiran Kamuju &lt;<a href="mailto:infyquest@gmail.com">infyquest@gmail.com</a>&gt;<br></div>

From b362227ef02c50153d2386bc8a291a2b8bb94eb3 Mon Sep 17 00:00:00 2001
From: Vijay Kiran Kamuju <infyquest@gmail.com>
Date: Sun, 14 Mar 2021 17:44:32 +0100
Subject: [PATCH] ntdll: Implement RtlGetCallersAddress function.

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=50726

Signed-off-by: Vijay Kiran Kamuju <infyquest@gmail.com>
---
 dlls/ntdll/ntdll.spec      |  2 +-
 dlls/ntdll/signal_arm.c    | 18 ++++++++++++++++++
 dlls/ntdll/signal_arm64.c  | 18 ++++++++++++++++++
 dlls/ntdll/signal_i386.c   | 17 +++++++++++++++++
 dlls/ntdll/signal_x86_64.c | 17 +++++++++++++++++
 5 files changed, 71 insertions(+), 1 deletion(-)

diff --git a/dlls/ntdll/ntdll.spec b/dlls/ntdll/ntdll.spec
index c8622ba21f4..0ab551c199f 100644
--- a/dlls/ntdll/ntdll.spec
+++ b/dlls/ntdll/ntdll.spec
@@ -689,7 +689,7 @@
 @ stub RtlGenerate8dot3Name
 @ stdcall RtlGetAce(ptr long ptr)
 @ stdcall RtlGetActiveActivationContext(ptr)
-@ stub RtlGetCallersAddress
+@ stdcall RtlGetCallersAddress(ptr ptr)
 @ stdcall RtlGetCompressionWorkSpaceSize(long ptr ptr)
 @ stdcall RtlGetControlSecurityDescriptor(ptr ptr ptr)
 @ stdcall RtlGetCurrentDirectory_U(long ptr)
diff --git a/dlls/ntdll/signal_arm.c b/dlls/ntdll/signal_arm.c
index 8b0004e0df0..b51bd0fdd26 100644
--- a/dlls/ntdll/signal_arm.c
+++ b/dlls/ntdll/signal_arm.c
@@ -303,6 +303,24 @@ USHORT WINAPI RtlCaptureStackBackTrace( ULONG skip, ULONG count, PVOID *buffer,
     return 0;
 }
 
+/***********************************************************************
+ *              RtlGetCallersAddress      (NTDLL.@)
+ */
+VOID WINAPI RtlGetCallersAddress( PVOID *address, PVOID *caller )
+{
+    PVOID backtrace[2];
+    USHORT framecount = 0;
+
+    TRACE( "(%p, %p)\n", address, caller );
+
+    *address = NULL;
+    *caller = NULL;
+    framecount = RtlCaptureStackBackTrace(2, 2, &backtrace[0], NULL);
+
+    if ( framecount ) *address = backtrace[0]; 
+    if ( framecount > 1 ) *caller = backtrace[1];
+}
+
 /***********************************************************************
  *           signal_start_thread
  */
diff --git a/dlls/ntdll/signal_arm64.c b/dlls/ntdll/signal_arm64.c
index dc6b072fa6c..48d64ad30f1 100644
--- a/dlls/ntdll/signal_arm64.c
+++ b/dlls/ntdll/signal_arm64.c
@@ -1465,6 +1465,24 @@ USHORT WINAPI RtlCaptureStackBackTrace( ULONG skip, ULONG count, PVOID *buffer,
     return 0;
 }
 
+/***********************************************************************
+ *              RtlGetCallersAddress      (NTDLL.@)
+ */
+VOID WINAPI RtlGetCallersAddress( PVOID *address, PVOID *caller )
+{
+    PVOID backtrace[2];
+    USHORT framecount = 0;
+
+    TRACE( "(%p, %p)\n", address, caller );
+
+    *address = NULL;
+    *caller = NULL;
+    framecount = RtlCaptureStackBackTrace(2, 2, &backtrace[0], NULL);
+
+    if ( framecount ) *address = backtrace[0]; 
+    if ( framecount > 1 ) *caller = backtrace[1];
+}
+
 /***********************************************************************
  *           signal_start_thread
  */
diff --git a/dlls/ntdll/signal_i386.c b/dlls/ntdll/signal_i386.c
index 635b8f4de81..3c48ae447f5 100644
--- a/dlls/ntdll/signal_i386.c
+++ b/dlls/ntdll/signal_i386.c
@@ -498,6 +498,23 @@ USHORT WINAPI RtlCaptureStackBackTrace( ULONG skip, ULONG count, PVOID *buffer,
     return i;
 }
 
+/***********************************************************************
+ *              RtlGetCallersAddress     (NTDLL.@)
+ */
+VOID WINAPI RtlGetCallersAddress( PVOID *address, PVOID *caller )
+{
+    PVOID backtrace[2];
+    USHORT framecount = 0;
+
+    TRACE("(%p %p)\n", address, caller);
+
+    *address = NULL;
+    *caller = NULL;
+    framecount = RtlCaptureStackBackTrace(2, 2, &backtrace[0], NULL);
+
+    if ( framecount ) *address = backtrace[0]; 
+    if ( framecount > 1 ) *caller = backtrace[1];
+}
 
 /***********************************************************************
  *           signal_start_thread
diff --git a/dlls/ntdll/signal_x86_64.c b/dlls/ntdll/signal_x86_64.c
index b5be4f35758..6215ea2f7d8 100644
--- a/dlls/ntdll/signal_x86_64.c
+++ b/dlls/ntdll/signal_x86_64.c
@@ -1532,6 +1532,23 @@ USHORT WINAPI RtlCaptureStackBackTrace( ULONG skip, ULONG count, PVOID *buffer,
     return num_entries;
 }
 
+/***********************************************************************
+ *              RtlGetCallersAddress      (NTDLL.@)
+ */
+VOID WINAPI RtlGetCallersAddress( PVOID *address, PVOID *caller )
+{
+    PVOID backtrace[2];
+    USHORT framecount = 0;
+
+    TRACE("(%p %p)\n", address, caller);
+
+    *address = NULL;
+    *caller = NULL;
+    framecount = RtlCaptureStackBackTrace(2, 2, &backtrace[0], NULL);
+
+    if ( framecount ) *address = backtrace[0]; 
+    if ( framecount > 1 ) *caller = backtrace[1];
+}
 
 /***********************************************************************
  *           signal_start_thread

-- 
2.30.2