- The shared object initialization has to be performed before any local

constructors are invoked, and after all local destructors have been
  invoked.


git-svn-id: file:///Users/olsen/Code/migration-svn-zu-git/logical-line-staging/clib2/trunk@15205 87f5fb63-7c3d-0410-a384-fd976d0f7a62

library/changes

@@ -1,3 +1,7 @@
+- The shared object initialization has to be performed before any local
+  constructors are invoked, and after all local destructors have been
+  invoked.
+
 - Added support for ELF shared objects and libraries. This is implemented through
   constructor/destructor functions, which means that you can use this
   functionality even in Amiga Exec style shared libraries, with the proper

library/crtbegin.c

@@ -1,5 +1,5 @@
 /* 
- * $Id: crtbegin.c,v 1.11 2006-09-22 09:02:51 obarthel Exp $
+ * $Id: crtbegin.c,v 1.12 2010-08-21 09:57:50 obarthel Exp $
  *
  * :ts=4
  *
@@ -10,9 +10,16 @@
 
 /****************************************************************************/
 
-#ifndef EXEC_TYPES_H
-#include <exec/types.h>
-#endif /* EXEC_TYPES_H */
+#ifndef _STDLIB_HEADERS_H
+#include "stdlib_headers.h"
+#endif /* _STDLIB_HEADERS_H */
+
+/****************************************************************************/
+
+#include <libraries/elf.h>
+
+#include <proto/elf.h>
+#include <proto/dos.h>
 
 /****************************************************************************/
 
@@ -32,12 +39,117 @@ void _fini(void);
 
 /****************************************************************************/
 
+/* These are used to initialize the shared objects linked to this binary,
+   and for the dlopen(), dlclose() and dlsym() functions. */
+struct Library *	__ElfBase;
+struct ElfIFace *	__IElf;
+
+Elf32_Handle		__elf_handle;
+
+/****************************************************************************/
+
+static VOID close_elf_library(void)
+{
+	if(__IElf != NULL)
+	{
+		DropInterface((struct Interface *)__IElf);
+		__IElf = NULL;
+	}
+		
+	if(__ElfBase != NULL)
+	{
+		CloseLibrary(__ElfBase);
+		__ElfBase = NULL;
+	}
+}
+
+/****************************************************************************/
+
+static BOOL open_elf_library(void)
+{
+	BOOL success = FALSE;
+
+	/* We need elf.library V52.2 or higher. */
+	__ElfBase = OpenLibrary("elf.library",0);
+	if(__ElfBase == NULL || (__ElfBase->lib_Version < 52) || (__ElfBase->lib_Version == 52 && __ElfBase->lib_Revision < 2))
+		goto out;
+
+	__IElf = (struct ElfIFace *)GetInterface(__ElfBase,"main",1,NULL);
+	if(__IElf == NULL)
+		goto out;
+
+	success = TRUE;
+
+ out:
+
+	return(success);
+}
+
+/****************************************************************************/
+
+static void shared_obj_exit(void)
+{
+	/* If we got what we wanted, trigger the destructors,
+	   etc. in the shared objects linked to this binary. */
+	if(__elf_handle != NULL)
+		InitSHLibs(__elf_handle,FALSE);
+
+	close_elf_library();
+}
+
+/****************************************************************************/
+
+static void shared_obj_init(void)
+{
+	struct ElfIFace * IElf;
+	BOOL success = FALSE;
+	BPTR segment_list;
+
+	if(!open_elf_library())
+		goto out;
+
+	/* Try to find the Elf handle associated with this
+	   program's segment list. */
+	segment_list = GetProcSegList(NULL,GPSLF_CLI | GPSLF_SEG);
+	if(segment_list == ZERO)
+		goto out;
+
+	if(GetSegListInfoTags(segment_list,
+		GSLI_ElfHandle,&__elf_handle,
+	TAG_DONE) != 1)
+	{
+		goto out;
+	}
+
+	if(__elf_handle == NULL)
+		goto out;
+
+	IElf = __IElf;
+
+	/* Trigger the constructors, etc. in the shared objects
+	   linked to this binary. */
+	InitSHLibs(__elf_handle,TRUE);
+
+	success = TRUE;
+
+ out:
+
+	if(!success)
+		close_elf_library();
+}
+
+/****************************************************************************/
+
 void
 _init(void)
 {
 	int num_ctors,i;
 	int j;
 
+	/* The shared objects need to be set up before any local
+	   constructors are invoked. */
+	shared_obj_init();
+
 	for(i = 1, num_ctors = 0 ; __CTOR_LIST__[i] != NULL ; i++)
 		num_ctors++;
 
@@ -58,6 +170,10 @@ _fini(void)
 
 	while(j++ < num_dtors)
 		__DTOR_LIST__[j]();
+
+	/* The shared objects need to be cleaned up after all local
+	   destructors have been invoked. */
+	shared_obj_exit();
 }
 
 /****************************************************************************/

library/libc.gmk

@@ -1,5 +1,5 @@
 #
-# $Id: libc.gmk,v 1.5 2010-08-20 15:33:36 obarthel Exp $
+# $Id: libc.gmk,v 1.6 2010-08-21 09:57:50 obarthel Exp $
 #
 # :ts=8
 #
@@ -248,7 +248,6 @@ C_LIB := \
 	stdlib_setjmp.o \
 	stdlib_set_errno.o \
 	stdlib_set_process_window.o \
-	stdlib_shared_libs.o \
 	stdlib_shell_escape.o \
 	stdlib_showerror.o \
 	stdlib_srand.o \