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Makefile: all asm in Gnu AS

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This commit is contained in:
Mathieu Maret 2021-10-31 00:04:01 +02:00
parent 0040fb1cda
commit 814d38bc97
2 changed files with 14 additions and 8 deletions
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16
Makefile
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@ -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)

6
arch/x86/boot/boot.s → arch/x86/boot/boot.S
View File

@ -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