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Fix issues with ASM

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This commit is contained in:
Curle 2019-06-20 23:32:03 +01:00
parent f5dc9b961b
commit 81d4d93c12
3 changed files with 22 additions and 38 deletions
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31
arch/i386/boot.s
View File

@ -1,29 +1,31 @@
MBOOT_ALIGN equ <<0 MBOOT_ALIGN equ 1<<0
MBOOT_MEMINFO equ 1<<1 MBOOT_MEMINFO equ 1<<1
MBOOT_FLAGS equ MBOOT_ALIGN | MBOOT_MEMINFO MBOOT_FLAGS equ MBOOT_ALIGN | MBOOT_MEMINFO
MBOOT_MAGIC equ 0x1BADB002 MBOOT_MAGIC equ 0x1BADB002
MBOOT_CHECKSUM equ -(MAGIC + FLAGS) MBOOT_CHECKSUM equ -(MBOOT_MAGIC + MBOOT_FLAGS)
[BITS 32] [BITS 32]
[GLOBAL mboot] [GLOBAL mboot]
[SECTION .multiboot]
[EXTERN code] ALIGN 4
[EXTERN bss]
[EXTERN end]
mboot: mboot:
dd MBOOT_MAGIC dd MBOOT_MAGIC
dd MBOOT_FLAGS dd MBOOT_FLAGS
dd mboot dd MBOOT_CHECKSUM
dd code
dd bss
dd end
dd start
[GLOBAL start] SECTION .bss
ALIGN 16
stack_bottom:
RESB 16384
stack_top:
SECTION .text
[GLOBAL _start]
[EXTERN kernel_main] [EXTERN kernel_main]
start: _start:
push ebx push ebx
cli cli
@ -31,7 +33,7 @@ start:
jmp $ jmp $
[GLOBAL load_gdt] ; Allows the C code to call gdt_flush(). [GLOBAL load_gdt] ; Allows the C code to call gdt_flush().
[EXTERN gp]
load_gdt: load_gdt:
mov eax, [esp+4] ; Get the pointer to the GDT, passed as a parameter. mov eax, [esp+4] ; Get the pointer to the GDT, passed as a parameter.
lgdt [eax] ; Load the new GDT pointer lgdt [eax] ; Load the new GDT pointer
@ -176,6 +178,7 @@ irq_common:
add esp, 8 add esp, 8
iret iret
[GLOBAL idt_load]
idt_load: idt_load:
mov eax, [esp+4] mov eax, [esp+4]
lidt [eax] lidt [eax]

2
arch/i386/make.config
View File

@ -5,7 +5,5 @@ KERNEL_ARCH_LIBS=
KERNEL_ARCH_OBJS= \ KERNEL_ARCH_OBJS= \
$(ARCHDIR)/boot.o \ $(ARCHDIR)/boot.o \
$(ARCHDIR)/gdt.o \
$(ARCHDIR)/isr.o \
$(ARCHDIR)/sys_clock.o \ $(ARCHDIR)/sys_clock.o \
$(ARCHDIR)/tty.o $(ARCHDIR)/tty.o

25
makefile
View File

@ -2,7 +2,7 @@ DEFAULT_HOST:=i686-elf
HOST?=DEFAULT_HOST HOST?=DEFAULT_HOST
HOSTARCH:=i386 HOSTARCH:=i386
CFLAGS?= -O2 -g CFLAGS?= -O2 -g -m32 -no-pie
CPPFLAGS?= CPPFLAGS?=
LDFLAGS?= LDFLAGS?=
LIBS?= LIBS?=
@ -13,7 +13,7 @@ EXEC_PREFIX?=$(PREFIX)
BOOTDIR?=$(EXEC_PREFIX)/boot BOOTDIR?=$(EXEC_PREFIX)/boot
INCLUDEDIR?=$(PREFIX)/include INCLUDEDIR?=$(PREFIX)/include
CFLAGS:=$(CFLAGS) -ffreestanding -Wall -Wextra CFLAGS:=$(CFLAGS) -ffreestanding -Wall -Wextra -I"../include" -I"../../include"
CPPFLAGS:=$(CPPFLAGS) -D__is_kernel -Iinclude CPPFLAGS:=$(CPPFLAGS) -D__is_kernel -Iinclude
LDFLAGS:=$(LDFLAGS) LDFLAGS:=$(LDFLAGS)
LIBS:=$(LIBS) -nostdlib -lgcc LIBS:=$(LIBS) -nostdlib -lgcc
@ -36,20 +36,12 @@ kernel/idt.o \
kernel/kernel.o kernel/kernel.o
OBJS=\ OBJS=\
$(ARCHDIR)/crti.o \ $(KERNEL_OBJS)
$(ARCHDIR)/crtbegin.o \
$(KERNEL_OBJS) \
$(ARCHDIR)/crtend.o \
$(ARCHDIR)/crtn.o
LINK_LIST=\ LINK_LIST=\
$(LDFLAGS) \ $(LDFLAGS) \
$(ARCHDIR)/crti.o \
$(ARCHDIR)/crtbegin.o \
$(KERNEL_OBJS) \ $(KERNEL_OBJS) \
$(LIBS) \ $(LIBS) \
$(ARCHDIR)/crtend.o \
$(ARCHDIR)/crtn.o
.PHONY: all clean install install-headers install-kernel .PHONY: all clean install install-headers install-kernel
.SUFFIXES: .o .c .s .SUFFIXES: .o .c .s
@ -59,19 +51,10 @@ all: red.kernel
red.kernel: $(OBJS) $(ARCHDIR)/linker.ld red.kernel: $(OBJS) $(ARCHDIR)/linker.ld
$(CC) -T $(ARCHDIR)/linker.ld -o $@ $(CFLAGS) $(LINK_LIST) $(CC) -T $(ARCHDIR)/linker.ld -o $@ $(CFLAGS) $(LINK_LIST)
$(ARCHDIR)/crtbegin.o $(ARCHDIR)/crtend.o:
OBJ=`$(CC) $(CFLAGS) $(LDFLAGS) -print-file-name=$(@F)` && cp "$$OBJ" $@
$(ARCHDIR)/gdt.o:
nasm -f elf $(ARCHDIR)/gdt.s
$(ARCHDIR)/isr.o:
nasm -f elf $(ARCHDIR)/isr.s
.c.o: .c.o:
$(CC) -MD -c $< -o $@ -std=gnu11 $(CFLAGS) $(CPPFLAGS) $(CC) -MD -c $< -o $@ -std=gnu11 $(CFLAGS) $(CPPFLAGS)
.s.o: .s.o:
$(CC) -MD -c $< -o $@ $(CFLAGS) $(CPPFLAGS) nasm -f elf $< -o $@
clean: clean:
rm -f red.kernel rm -f red.kernel