X-Git-Url: https://git.saurik.com/apple/objc4.git/blobdiff_plain/7c0e6487d7b67b6bf6c632300ee4b74e8950b051..7af964d1562d70f51a8e9aca24215ac3d83d0624:/runtime/objcrt.c

diff --git a/runtime/objcrt.c b/runtime/objcrt.c
new file mode 100644
index 0000000..af28301
--- /dev/null
+++ b/runtime/objcrt.c
@@ -0,0 +1,97 @@
+#define WIN32_LEAN_AND_MEAN
+#include <stdio.h>
+#include <windows.h>
+#include <stdlib.h>
+#include "objcrt.h"
+
+// Boundary symbols for metadata sections
+
+#pragma section(".objc_module_info$A",long,read,write)
+#pragma data_seg(".objc_module_info$A")
+static uintptr_t __objc_modStart = 0;
+#pragma section(".objc_module_info$C",long,read,write)
+#pragma data_seg(".objc_module_info$C")
+static uintptr_t __objc_modEnd = 0;
+
+#pragma section(".objc_protocol$A",long,read,write)
+#pragma data_seg(".objc_protocol$A")
+static uintptr_t __objc_protoStart = 0;
+#pragma section(".objc_protocol$C",long,read,write)
+#pragma data_seg(".objc_protocol$C")
+static uintptr_t __objc_protoEnd = 0;
+
+#pragma section(".objc_image_info$A",long,read,write)
+#pragma data_seg(".objc_image_info$A")
+static uintptr_t __objc_iiStart = 0;
+#pragma section(".objc_image_info$C",long,read,write)
+#pragma data_seg(".objc_image_info$C")
+static uintptr_t __objc_iiEnd = 0;
+
+#pragma section(".objc_message_refs$A",long,read,write)
+#pragma data_seg(".objc_message_refs$A")
+static uintptr_t __objc_selrefsStart = 0;
+#pragma section(".objc_message_refs$C",long,read,write)
+#pragma data_seg(".objc_message_refs$C")
+static uintptr_t __objc_selrefsEnd = 0;
+
+#pragma section(".objc_class_refs$A",long,read,write)
+#pragma data_seg(".objc_class_refs$A")
+static uintptr_t __objc_clsrefsStart = 0;
+#pragma section(".objc_class_refs$C",long,read,write)
+#pragma data_seg(".objc_class_refs$C")
+static uintptr_t __objc_clsrefsEnd = 0;
+
+#pragma data_seg()
+
+// Merge all metadata into .data
+// fixme order these by usage?
+#pragma comment(linker, "/MERGE:.objc_module_info=.data")
+#pragma comment(linker, "/MERGE:.objc_protocol=.data")
+#pragma comment(linker, "/MERGE:.objc_image_info=.data")
+#pragma comment(linker, "/MERGE:.objc_message_refs=.data")
+#pragma comment(linker, "/MERGE:.objc_class_refs=.data")
+
+
+// Image initializers
+
+static void *__hinfo = NULL;  // cookie from runtime
+extern IMAGE_DOS_HEADER __ImageBase;  // this image's header
+
+static int __objc_init(void)
+{
+    objc_sections sections = {
+        5, 
+        &__objc_modStart, &__objc_modEnd, 
+        &__objc_protoStart, &__objc_protoEnd, 
+        &__objc_iiStart, &__objc_iiEnd, 
+        &__objc_selrefsStart, &__objc_selrefsEnd, 
+        &__objc_clsrefsStart, &__objc_clsrefsEnd, 
+    };
+    __hinfo = _objc_init_image((HMODULE)&__ImageBase, &sections);
+    return 0;
+}
+
+static void __objc_unload(void)
+{
+    _objc_unload_image((HMODULE)&__ImageBase, __hinfo);
+}
+
+static int __objc_load(void)
+{
+    _objc_load_image((HMODULE)&__ImageBase, __hinfo);
+    return 0;
+}
+
+// run _objc_init_image ASAP
+#pragma section(".CRT$XIAA",long,read,write)
+#pragma data_seg(".CRT$XIAA")
+static void *__objc_init_fn = &__objc_init;
+
+// run _objc_load_image (+load methods) after init_seg(compiler) but before init_seg(library) or init_seg(user)
+#pragma section(".CRT$XCI",long,read,write)
+#pragma data_seg(".CRT$XCI")
+static void *__objc_load_fn = &__objc_load;
+
+// _objc_unload_image is called by atexit(), not by an image terminator
+
+#pragma data_seg()