Makefile

@@ -15,14 +15,16 @@ SUBDIRS := core drivers tests arch/$(ARCH)
 INCDIRS += $(foreach dir, $(SUBDIRS), -I$(dir))
 CPPFLAGS += $(INCDIRS)
 
-asmsrc=$(wildcard arch/$(ARCH)/boot/*.asm)
+asmsrc=
 asmobj=$(asmsrc:%.asm=%.o)
+gasmsrc=$(wildcard arch/$(ARCH)/*.S arch/$(ARCH)/boot/*.S)
+gasmobj=$(gasmsrc:%.S=%.o)
 csrc=$(shell find $(SUBDIRS) -type f -name "*.c")#   $(wildcard *.c)
-cobj=$(csrc:%.c=%.o) arch/$(ARCH)/cpu_context_switch.o arch/$(ARCH)/irq_pit.o arch/$(ARCH)/irq_wrappers.o arch/$(ARCH)/exception_wrappers.o arch/$(ARCH)/syscall_wrappers.o
-deps = $(csrc:%.c=%.d)
+cobj=$(csrc:%.c=%.o)
+deps=$(csrc:%.c=%.d) $(gasmsrc:%.S=%.d)
 
-kernel kernel.sym &: $(asmobj) $(cobj) linker.ld
-	$(CC) -m32  -ffreestanding -nostdlib $(cobj) $(asmobj) -o kernel -T linker.ld -lgcc
+kernel kernel.sym &: $(asmobj) $(gasmobj) $(cobj) linker.ld
+	$(CC) -m32  -ffreestanding -nostdlib $(cobj) $(gasmobj) $(asmobj) -o kernel -T linker.ld -lgcc
 	objcopy --only-keep-debug kernel kernel.sym
 	objcopy --strip-debug  kernel
 
@@ -39,7 +41,7 @@ disk.img:
 	$(AS) $(ASFLAGS) -o $@ $<
 
 %.o: %.S
-	$(CC) $(INCDIRS) -c "$<" $(CFLAGS) -o "$@"
+	$(CC) $(CFLAGS) $(CPPFLAGS) -c "$<" -o "$@"
 
 
 test: CFLAGS += -DRUN_TEST
@@ -61,7 +63,7 @@ debug_test: CFLAGS += $(DEBUG_FLAGS) -DRUN_TEST
 debug_test: debug
 
 clean:
-	$(RM) kernel $(asmobj) $(cobj) $(deps) fd.iso kernel.sym
+	$(RM) kernel $(asmobj) $(gasmobj) $(cobj) $(deps) fd.iso kernel.sym
 	$(RM) -r isodir
 
 ifneq ($(MAKECMDGOALS),clean)

arch/x86/boot/boot.S

@@ -31,7 +31,7 @@ stack is properly aligned and failure to align the stack will result in
 undefined behavior.
 */
 .section .bss
-.align 16
+.align 4096
 stack_bottom:
 .skip 16384 # 16 KiB
 stack_top:
@@ -117,3 +117,7 @@ Set the size of the _start symbol to the current location '.' minus its start.
 This is useful when debugging or when you implement call tracing.
 */
 .size _start, . - _start
+.global _stack_bottom
+_stack_bottom: stack_bottom
+.global _stack_stop
+_stack_stop: stack_top