Changed our nice crt0.c to something more GCC compatible; we're not calling

the global constructors/desctructors ourselves anymore, but let GCC do
that using crtbegin/end.o how it's thought to be done.


git-svn-id: file:///srv/svn/repos/haiku/trunk/current@10946 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/kernel/glue/Jamfile

@@ -1,8 +1,8 @@
 SubDir OBOS_TOP src kernel glue ;
 
 KernelObjects
-	crt0.c
 	init_term_dyn.c
 	start_dyn.c
 	;
 
+SubInclude OBOS_TOP src kernel glue arch ;

src/kernel/glue/arch/Jamfile

@@ -0,0 +1 @@
+SubInclude OBOS_TOP src kernel glue arch $(OBOS_ARCH) ;

src/kernel/glue/arch/x86/Jamfile

@@ -0,0 +1,7 @@
+SubDir OBOS_TOP src kernel glue arch x86 ;
+
+KernelObjects
+	crti.S
+	crtn.S
+	;
+

src/kernel/glue/arch/x86/crti.S

@@ -0,0 +1,38 @@
+/*
+ * Copyright 2005, Axel Dörfler, axeld@pinc-software.de.
+ * Distributed under the terms of the MIT License.
+ */
+
+/**	This file contains the first part of the ".init" and ".fini" sections in
+ *	the ELF executable.
+ *	The functions defined here will be called during initialization/termination
+ *	of the loaded executable/library. The ".init" and ".fini" sections are
+ *	stacked together like this:
+ *
+ *	crti.S		entry point
+ *				call to _init_before/_term_before
+ *	crtbegin.S	GCC specific: constructors/destructors are called, ...
+ *	crtend.S
+ *	crtn.S		call to _init_after/_term_after
+ *				exit
+ */
+
+#define FUNCTION(x) .global x; .type x,@function; x
+
+.section .init
+FUNCTION(_init):
+	pushl	%ebp
+	movl	%esp, %ebp
+	pushl	0xc(%ebp)	// program args
+	pushl	0x8(%ebp)	// image ID
+	call	_init_before
+	// crtbegin.o stuff comes here
+
+.section .fini
+FUNCTION(_fini):
+	pushl	%ebp
+	movl	%esp, %ebp
+	pushl	0xc(%ebp)	// program args
+	pushl	0x8(%ebp)	// image ID
+	call	_term_before
+	// crtbegin.o stuff comes here

src/kernel/glue/arch/x86/crtn.S

@@ -0,0 +1,23 @@
+/*
+ * Copyright 2005, Axel Dörfler, axeld@pinc-software.de.
+ * Distributed under the terms of the MIT License.
+ */
+
+/**	This file contains the final part of the ".init" and ".fini" sections in
+ *	the ELF executable. It is tightly connected to crti.S.
+ *	Have a look at crti.S to find a description of what happens here.
+ */
+
+.section .init
+	// the image ID and program args are still on the stack
+	call	_init_after
+	movl	%ebp, %esp
+	popl	%ebp
+	ret
+
+.section .fini
+	// the image ID and program args are still on the stack
+	call	_term_after
+	movl	%ebp, %esp
+	popl	%ebp
+	ret

src/kernel/glue/crt0.c

@@ -1,62 +0,0 @@
-/* 
-** Copyright 2003, Axel Dörfler, axeld@pinc-software.de. All rights reserved.
-** Distributed under the terms of the OpenBeOS License.
-*/
-
-
-#include "init_term_dyn.h"
-
-
-void _init(int id, void *args) __attribute__((section(".init")));
-void _fini(int id, void *args) __attribute__((section(".fini")));
-
-// constructor/destructor lists as defined in the ld-script
-extern void (*__ctor_list)(void);
-extern void (*__ctor_end)(void);
-extern void (*__dtor_list)(void);
-extern void (*__dtor_end)(void);
-
-
-static void
-_call_ctors(void)
-{ 
-	void (**f)(void);
-
-	for (f = &__ctor_list; f < &__ctor_end; f++) {
-		(**f)();
-	}
-}
-
-
-static void
-_call_dtors(void)
-{ 
-	void (**f)(void);
-
-	for (f = &__dtor_list; f < &__dtor_end; f++) {
-		(**f)();
-	}
-}
-
-
-void
-_init(int id, void *args)
-{
-	_init_before(id, args);
-
-	_call_ctors();
-
-	_init_after(id, args);
-}
-
-
-void
-_fini(int id, void *args)
-{
-	_term_before(id, args);
-	
-	_call_dtors();
-
-	_term_after(id, args);
-}
-

src/kernel/glue/init_term_dyn.c

@@ -1,7 +1,7 @@
-/* 
-** Copyright 2003, Axel Dörfler, axeld@pinc-software.de. All rights reserved.
-** Distributed under the terms of the OpenBeOS License.
-*/
+/*
+ * Copyright 2003-2005, Axel Dörfler, axeld@pinc-software.de. All rights reserved.
+ * Distributed under the terms of the MIT License.
+ */
 
 
 #include <user_runtime.h>
@@ -10,11 +10,11 @@
 #include "init_term_dyn.h"
 
 
-/* These functions are called from _init()/_fini() (in crti.S, crtn.S)
- * _init/fini_before() is called before crtbegin/end code is executed,
- * _init/fini_after() after this.
- * crtbegin contains code to initialize all global constructors and
- * probably other GCC related things.
+/**	These functions are called from _init()/_fini() (in crti.S, crtn.S)
+ *	_init/_term_before() is called before crtbegin/end code is executed,
+ *	_init/_term_after() after this.
+ *	crtbegin contains code to initialize all global constructors and
+ *	other GCC related things (like exception frames).
  */