removed multiboot kludge; using ELF kernel with different virtual and load addresses

git-svn-id: svn://anubis/hos/trunk@71 5b3e749e-e535-0410-8002-a9bb6afbdfca

kernel/Makefile

@@ -26,8 +26,8 @@ $(KERNEL).gz: $(KERNEL)
 
 $(KERNEL): $(KERNEL).o
 	$(LD) $(LDFLAGS) -o $@ $<
-	$(LD) $(LDFLAGS) --oformat=elf32-i386 -o $@.elf $<
-	$(OBJDUMP) --disassemble --source $@.elf > $@.dump
+	$(OBJDUMP) --disassemble --source $@ > $@.dump
+	strip $@
 	
 $(KERNEL).o: $(SUBDIRS)
 	$(LD) -r -o $@ $(foreach subdir,$(SUBDIRS),$(subdir)/$(subdir)_all.o) $(LDLIBS)

kernel/boot/boot.asm

@@ -5,7 +5,7 @@
 ; Adapted from HOS 0.16 source
 
 %define MULTIBOOT_HEADER_MAGIC      0x1BADB002
-%define MULTIBOOT_HEADER_FLAGS      0x00010003
+%define MULTIBOOT_HEADER_FLAGS      0x00000003
 
 %define VIRTUAL_OFFSET              0xE0000000          ; kernel virtual addr
 %define CONSOLE_MEMORY              0xB8000
@@ -29,22 +29,6 @@ extern k_bootstrap, bootstrap_stack, mm_gdtr, k_main
 start:
 
 
-;**************************************************************************
-;* Multiboot header data block                                            *
-;**************************************************************************
-align 4
-multiboot_header:
-    dd      MULTIBOOT_HEADER_MAGIC                              ; magic
-    dd      MULTIBOOT_HEADER_FLAGS                              ; flags
-    dd      -(MULTIBOOT_HEADER_MAGIC + MULTIBOOT_HEADER_FLAGS)  ; checksum
-
-    dd      multiboot_header - VIRTUAL_OFFSET                   ; header_addr
-    dd      start - VIRTUAL_OFFSET                              ; load_addr
-    dd      _bss - VIRTUAL_OFFSET                               ; load_end_addr
-    dd      _end - VIRTUAL_OFFSET                               ; bss_end_addr
-    dd      multiboot_entry - VIRTUAL_OFFSET                    ; entry_addr
-
-
 ;**************************************************************************
 ;* Resume execution                                                       *
 ;**************************************************************************
@@ -56,6 +40,16 @@ multiboot_entry:
     jmp     KERNEL_CODE_32_TMP_SEG:segmented_start
 
 
+;**************************************************************************
+;* Multiboot header data block                                            *
+;**************************************************************************
+align 4
+multiboot_header:
+    dd      MULTIBOOT_HEADER_MAGIC                              ; magic
+    dd      MULTIBOOT_HEADER_FLAGS                              ; flags
+    dd      -(MULTIBOOT_HEADER_MAGIC + MULTIBOOT_HEADER_FLAGS)  ; checksum
+
+
 ;**************************************************************************
 ;* At this point address 0xE000_0000 is mapped to physical address 0x0    *
 ;**************************************************************************

kernel/link.ld

@@ -1,8 +1,10 @@
-OUTPUT_FORMAT(binary)
+OUTPUT_FORMAT(elf32-i386)
 ENTRY(start)
+virt = 0xE0100000;
+phys = 0x00100000;
 SECTIONS
 {
-    .text 0xE0100000 : {
+    .text virt : AT(phys) {
         code = .; _code = .; __code = .;
         *(.text*)
         *(.gnu.linkonce*)