[PATCH v2 1/2] winecrt0: Implement static constructors support.

[Rémi Bernon]

From: Rémi Bernon

---
 dlls/winecrt0/crt_dllmain.c | 29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)

diff --git a/dlls/winecrt0/crt_dllmain.c b/dlls/winecrt0/crt_dllmain.c
index 181760c884a..56660e55097 100644
--- a/dlls/winecrt0/crt_dllmain.c
+++ b/dlls/winecrt0/crt_dllmain.c
@@ -25,8 +25,37 @@
 #include "windef.h"
 #include "winbase.h"

+#if defined(_MSC_VER)
+#define _CRTALLOC(x) __declspec(allocate(x))
+#elif defined(__GNUC__)
+#define _CRTALLOC(x) __attribute__((section(x)))
+#else
+#define _CRTALLOC(x) static /* unsupported */
+#endif
+
+_CRTALLOC(".CRT$XIA") void (*__xi_a)(void) = 0;
+_CRTALLOC(".CRT$XIZ") void (*__xi_z)(void) = 0;
+_CRTALLOC(".CRT$XCA") void (*__xc_a)(void) = 0;
+_CRTALLOC(".CRT$XCZ") void (*__xc_z)(void) = 0;
+
+#if defined(__GNUC__)
+void (*__CTOR_LIST__)(void) __attribute__((weak)) = 0;
+void (*__DTOR_LIST__)(void) __attribute__((weak)) = 0;
+#endif
+
+static void _CRT_INIT(void)
+{
+    void (**ctor)(void);
+    if ((ctor = &__xi_a)) while (++ctor != &__xi_z && *ctor) (*ctor)();
+    if ((ctor = &__xc_a)) while (++ctor != &__xc_z && *ctor) (*ctor)();
+#if defined(__GNUC__)
+    if ((ctor = &__CTOR_LIST__) && *ctor == (void *)-1) while (++ctor != &__DTOR_LIST__ && *ctor) (*ctor)();
+#endif
+}
+
 BOOL WINAPI DllMainCRTStartup( HINSTANCE inst, DWORD reason, void *reserved )
 {
+    if (reason == DLL_PROCESS_ATTACH) _CRT_INIT();
     return DllMain( inst, reason, reserved );
 }