Changeset 96043 in vbox for trunk/src/VBox/Runtime/include

Timestamp:

Aug 4, 2022 10:08:07 PM (2 years ago)

Author:

vboxsync

Message:

IPRT,/Config.kmk,iprt/asmdefs.mac,Add/3D/Config.kmk: Generate weak CRT name aliases for nocrt_xxx function using genalias on Windows (, OS/2 and possibly macOS), while for ELF targets we'll use a RT_ALIAS_AND_EXPORT_NOCRT_SYMBOL/RT_NOCRT_BEGINPROC macros with the function definition. bugref:10261

File:

• trunk/src/VBox/Runtime/include/internal/iprt.h (modified) (1 diff)

trunk/src/VBox/Runtime/include/internal/iprt.h

@@ -64 +64 @@
 #endif
 
+/** @def RT_ALIAS_AND_EXPORT_NOCRT_SYMBOL
+ * Creates symbol alias and export a RT_NOCRT symbol.
+ *
+ * For targets using ELF this macro generates weak symbol aliases, for the other
+ * object formats the makefile scans source files for this macro and produces
+ * separate object files with the aliases.
+ *
+ * @param   a_Name      The CRT function or variable name.
+ *
+ * @todo    Does not support ELF targets using underscore prefixed symbols.
+ */
+#if defined(__ELF__) && defined(RT_WITH_NOCRT_ALIASES) && !defined(RT_WITHOUT_NOCRT_ALIASES)
+# ifdef RT_WITH_NOCRT_UNDERSCORE_ALIASES
+#  define RT_ALIAS_AND_EXPORT_NOCRT_SYMBOL(a_Name) RT_EXPORT_SYMBOL(a_Name) \
+    __asm__(".weak " #a_Name "\n\t" \
+            ".set  " #a_Name "," RT_NOCRT_STR(a_Name) "\n\t" \
+            ".weak _" #a_Name "\n\t" \
+            ".set  _" #a_Name "," RT_NOCRT_STR(a_Name) "\n\t")
+# else
+#  define RT_ALIAS_AND_EXPORT_NOCRT_SYMBOL(a_Name) RT_EXPORT_SYMBOL(a_Name) \
+    __asm__(".weak " #a_Name "\n\t" \
+            ".set  " #a_Name "," RT_NOCRT_STR(a_Name) "\n\t")
+# endif
+#else
+# define RT_ALIAS_AND_EXPORT_NOCRT_SYMBOL(a_Name) RT_EXPORT_SYMBOL(a_Name)
+#endif
+
+/** @def RT_ALIAS_AND_EXPORT_NOCRT_SYMBOL_WITHOUT_UNDERSCORE
+ * Variant of RT_ALIAS_AND_EXPORT_NOCRT_SYMBOL that omits the
+ * underscore-prefixed variant of the symbol.
+ *
+ * @param   a_Name      The CRT function or variable name.
+ */
+#if defined(__ELF__) && defined(RT_WITH_NOCRT_ALIASES) && !defined(RT_WITHOUT_NOCRT_ALIASES)
+# define RT_ALIAS_AND_EXPORT_NOCRT_SYMBOL_WITHOUT_UNDERSCORE(a_Name) RT_EXPORT_SYMBOL(a_Name) \
+    __asm__(".weak " #a_Name "\n\t" \
+            ".set  " #a_Name "," RT_NOCRT_STR(a_Name) "\n\t")
+#else
+# define RT_ALIAS_AND_EXPORT_NOCRT_SYMBOL_WITHOUT_UNDERSCORE(a_Name) RT_EXPORT_SYMBOL(a_Name)
+#endif
+
 
 /** @def RT_MORE_STRICT