Link crtbegin.o and crtend.o into the kernel.

sortix/Makefile

@@ -62,6 +62,11 @@ endif
 
 # Object files that constitute the kernel.
 
+CRTI_OBJ:=$(CPU)/crti.o
+CRTBEGIN_OBJ:=$(shell $(HOSTCXX) $(CXXFLAGS) -print-file-name=crtbegin.o)
+CRTEND_OBJ:=$(shell $(HOSTCXX) $(CXXFLAGS) -print-file-name=crtend.o)
+CRTN_OBJ:=$(CPU)/crtn.o
+
 LIBS=\
 -nostdlib \
 -lc-sortix \
@@ -139,9 +144,14 @@ vnode.o \
 worker.o \
 
 ALLOBJS=\
+$(CRTI_OBJ) \
 $(OBJS) \
+$(CRTN_OBJ) \
 end.o
 
+LINK_OBJECTS=\
+$(CRTI_OBJ) $(CRTBEGIN_OBJ) $(OBJS) $(LIBS) $(CRTN_OBJ) $(CRTEND_OBJ) end.o
+
 # Rules and recipes for building the kernel.
 
 all: kernel
@@ -157,7 +167,7 @@ headers:
 ifeq ($(CPU),x64)
 
 sortix-x86_64.bin: $(ALLOBJS)
-	$(HOSTCXX) $(CXXFLAGS) -Wl,-Ttext -Wl,100000 -Wl,-z -Wl,max-page-size=0x1000 $(OBJS) $(LIBS) end.o -o $@
+	$(HOSTCXX) $(CXXFLAGS) -Wl,-Ttext -Wl,100000 -Wl,-z -Wl,max-page-size=0x1000 $(LINK_OBJECTS) -o $@
 
 sortix.bin: sortix-x86_64.bin
 	$(HOSTOBJCOPY) $< -O elf32-i386-sortix $@
@@ -168,7 +178,7 @@ endif
 ifeq ($(CPU),x86)
 
 sortix.bin: $(ALLOBJS)
-	$(HOSTCXX) $(CXXFLAGS) -Wl,-Ttext -Wl,100000 $(OBJS) $(LIBS) end.o -o $@
+	$(HOSTCXX) $(CXXFLAGS) -Wl,-Ttext -Wl,100000 $(LINK_OBJECTS) -o $@
 
 endif
 

sortix/kernel.cpp

@@ -160,6 +160,8 @@ extern "C" void KernelInit(unsigned long magic, multiboot_info_t* bootinfo)
 	// Stage 1. Initialization of Early Environment.
 	//
 
+	// TODO: Call global constructors using the _init function.
+
 	// Initialize system calls.
 	Syscall::Init();
 

sortix/x64/crti.s

@@ -0,0 +1,39 @@
+/*******************************************************************************
+
+    Copyright(C) Jonas 'Sortie' Termansen 2012.
+
+    This file is part of Sortix.
+
+    Sortix is free software: you can redistribute it and/or modify it under the
+    terms of the GNU General Public License as published by the Free Software
+    Foundation, either version 3 of the License, or (at your option) any later
+    version.
+
+    Sortix is distributed in the hope that it will be useful, but WITHOUT ANY
+    WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+    FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
+    details.
+
+    You should have received a copy of the GNU General Public License along with
+    Sortix. If not, see <http://www.gnu.org/licenses/>.
+
+    x64/crti.s
+    Provides the header of the _init and _fini functions.
+
+*******************************************************************************/
+
+.section .init
+.global _init
+.type _init, @function
+_init:
+	push %rbp
+	movq %rsp, %rbp
+	/* gcc will nicely put the contents of crtbegin.o's .init section here. */
+
+.section .fini
+.global _fini
+.type _fini, @function
+_fini:
+	push %rbp
+	movq %rsp, %rbp
+	/* gcc will nicely put the contents of crtbegin.o's .fini section here. */

sortix/x64/crtn.s

@@ -0,0 +1,33 @@
+/*******************************************************************************
+
+    Copyright(C) Jonas 'Sortie' Termansen 2012.
+
+    This file is part of Sortix.
+
+    Sortix is free software: you can redistribute it and/or modify it under the
+    terms of the GNU General Public License as published by the Free Software
+    Foundation, either version 3 of the License, or (at your option) any later
+    version.
+
+    Sortix is distributed in the hope that it will be useful, but WITHOUT ANY
+    WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+    FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
+    details.
+
+    You should have received a copy of the GNU General Public License along with
+    Sortix. If not, see <http://www.gnu.org/licenses/>.
+
+    x64/crtn.s
+    Provides the tail of the _init and _fini functions.
+
+*******************************************************************************/
+
+.section .init
+	/* gcc will nicely put the contents of crtend.o's .init section here. */
+	popq %rbp
+	ret
+
+.section .fini
+	/* gcc will nicely put the contents of crtend.o's .fini section here. */
+	popq %rbp
+	ret

sortix/x86/crti.s

@@ -0,0 +1,39 @@
+/*******************************************************************************
+
+    Copyright(C) Jonas 'Sortie' Termansen 2012.
+
+    This file is part of Sortix.
+
+    Sortix is free software: you can redistribute it and/or modify it under the
+    terms of the GNU General Public License as published by the Free Software
+    Foundation, either version 3 of the License, or (at your option) any later
+    version.
+
+    Sortix is distributed in the hope that it will be useful, but WITHOUT ANY
+    WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+    FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
+    details.
+
+    You should have received a copy of the GNU General Public License along with
+    Sortix. If not, see <http://www.gnu.org/licenses/>.
+
+    x86/crti.s
+    Provides the header of the _init and _fini functions.
+
+*******************************************************************************/
+
+.section .init
+.global _init
+.type _init, @function
+_init:
+	push %ebp
+	movl %esp, %ebp
+	/* gcc will nicely put the contents of crtbegin.o's .init section here. */
+
+.section .fini
+.global _fini
+.type _fini, @function
+_fini:
+	push %ebp
+	movl %esp, %ebp
+	/* gcc will nicely put the contents of crtbegin.o's .fini section here. */

sortix/x86/crtn.s

@@ -0,0 +1,33 @@
+/*******************************************************************************
+
+    Copyright(C) Jonas 'Sortie' Termansen 2012.
+
+    This file is part of Sortix.
+
+    Sortix is free software: you can redistribute it and/or modify it under the
+    terms of the GNU General Public License as published by the Free Software
+    Foundation, either version 3 of the License, or (at your option) any later
+    version.
+
+    Sortix is distributed in the hope that it will be useful, but WITHOUT ANY
+    WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+    FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
+    details.
+
+    You should have received a copy of the GNU General Public License along with
+    Sortix. If not, see <http://www.gnu.org/licenses/>.
+
+    x86/crtn.s
+    Provides the tail of the _init and _fini functions.
+
+*******************************************************************************/
+
+.section .init
+	/* gcc will nicely put the contents of crtend.o's .init section here. */
+	popl %ebp
+	ret
+
+.section .fini
+	/* gcc will nicely put the contents of crtend.o's .fini section here. */
+	popl %ebp
+	ret