1 files changed, 105 insertions, 0 deletions
diff --git a/src/VBox/Additions/3D/win/VBoxICD/icd_forwarders.py b/src/VBox/Additions/3D/win/VBoxICD/icd_forwarders.py
new file mode 100755
index 00000000..c9ffe2f5
--- /dev/null
+++ b/src/VBox/Additions/3D/win/VBoxICD/icd_forwarders.py
@@ -0,0 +1,105 @@
+"""
+Copyright (C) 2018-2023 Oracle and/or its affiliates.
+
+This file is part of VirtualBox base platform packages, as
+available from https://www.virtualbox.org.
+
+This program is free software; you can redistribute it and/or
+modify it under the terms of the GNU General Public License
+as published by the Free Software Foundation, in version 3 of the
+License.
+
+This program is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program; if not, see <https://www.gnu.org/licenses>.
+
+SPDX-License-Identifier: GPL-3.0-only
+"""
+
+import sys
+
+def GenerateForwarders():
+
+    # Get list of functions.
+    exports_file = open(sys.argv[1], "r")
+    if not exports_file:
+        print("Error: couldn't open %s file!" % filename)
+        sys.exit()
+
+    names = []
+    cbArgs = []
+    for line in exports_file.readlines():
+        line = line.strip()
+        if len(line) > 0 and line[0] != ';' and line != 'EXPORTS':
+            # Parse 'glAccum = glAccum@8'
+            words = line.split('=', 1)
+
+            # Function name
+            names.append(words[0].strip())
+
+            # Size of arguments in bytes
+            words = words[1].split('@')
+            cbArgs.append(words[1].strip())
+
+    exports_file.close()
+
+
+    #
+    # Assembler forwarders
+    #
+    asm_file = open(sys.argv[2], "w")
+    if not asm_file:
+        print("Error: couldn't open %s file!" % filename)
+        sys.exit()
+
+    asm_file.write('%include "iprt/asmdefs.mac"\n')
+    asm_file.write('\n')
+    asm_file.write(';;;; Enable ICD_LAZY_LOAD to lazy load the ICD DLL (does not work on Win64)\n')
+    asm_file.write('; %define ICD_LAZY_LOAD 1\n')
+    asm_file.write('\n')
+    asm_file.write('%ifdef RT_ARCH_AMD64\n')
+    asm_file.write('%define PTR_SIZE_PREFIX qword\n')
+    asm_file.write('%else ; X86\n')
+    asm_file.write('%define PTR_SIZE_PREFIX dword\n')
+    asm_file.write('%endif\n')
+    asm_file.write('\n')
+    asm_file.write('%ifdef ICD_LAZY_LOAD\n')
+    asm_file.write('extern NAME(VBoxLoadICD)\n')
+    asm_file.write('%endif\n')
+    asm_file.write('extern NAME(g_hmodICD)\n')
+
+    for index in range(len(names)):
+        fn = names[index]
+        cbRet = cbArgs[index]
+        asm_file.write('\n')
+        asm_file.write('BEGINPROC_EXPORTED %s\n' % fn)
+        asm_file.write('    extern NAME(pfn_%s)\n' % fn)
+        asm_file.write(';    int3\n')
+        asm_file.write('%ifdef ICD_LAZY_LOAD\n')
+        asm_file.write('    mov   xAX, PTR_SIZE_PREFIX NAME(g_hmodICD)\n')
+        asm_file.write('    mov   xAX, [xAX]\n')
+        asm_file.write('    or    xAX, xAX\n')
+        asm_file.write('    jnz   l_icd_loaded_%s\n' % fn)
+        asm_file.write('    call  NAME(VBoxLoadICD)\n')
+        asm_file.write('l_icd_loaded_%s:\n' % fn)
+        asm_file.write('%endif\n')
+        asm_file.write('    mov   xAX, PTR_SIZE_PREFIX NAME(pfn_%s)\n' % fn)
+        asm_file.write('    mov   xAX, [xAX]\n')
+        asm_file.write('    or    xAX, xAX\n')
+        asm_file.write('    jnz   l_jmp_to_%s\n' % fn)
+        asm_file.write('%ifdef RT_ARCH_AMD64\n')
+        asm_file.write('    ret\n')
+        asm_file.write('%else ; X86\n')
+        asm_file.write('    ret %s\n' % cbRet)
+        asm_file.write('%endif\n')
+        asm_file.write('l_jmp_to_%s:\n' % fn)
+        asm_file.write('    jmp   xAX\n')
+        asm_file.write('ENDPROC %s\n' % fn)
+
+    asm_file.close()
+
+GenerateForwarders()