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Add process

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This commit is contained in:
Alex Kotov 2020-11-25 13:14:21 +05:00
parent 75e7eeff8a
commit 015aa6a25b
Signed by: kotovalexarian
GPG key ID: 553C0EBBEB5D5F08
6 changed files with 50 additions and 10 deletions
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3
.gitignore vendored
View file

@ -1,9 +1,10 @@
*.o *.o
*.a *.a
*.multiboot2
*.bin *.bin
*.iso *.iso
/config.mk /config.mk
/rootfs/boot/kernelmq.multiboot2
/rootfs/boot/syscallproc
/vendor/* /vendor/*
!/vendor/.keep !/vendor/.keep

10
Makefile
View file

@ -4,7 +4,9 @@ AR = $(CCPREFIX)ar
AS = $(CCPREFIX)as AS = $(CCPREFIX)as
CC = $(CCPREFIX)gcc CC = $(CCPREFIX)gcc
GRUBCFG = rootfs/boot/grub/grub.cfg
KERNEL = rootfs/boot/kernelmq.multiboot2 KERNEL = rootfs/boot/kernelmq.multiboot2
SYSCALLPROC = rootfs/boot/syscallproc
CFLAGS = -std=gnu99 -ffreestanding -nostdinc -fno-builtin -fno-stack-protector -Wall -Wextra CFLAGS = -std=gnu99 -ffreestanding -nostdinc -fno-builtin -fno-stack-protector -Wall -Wextra
@ -53,20 +55,22 @@ OBJS := $(addprefix src/, $(OBJS))
run: $(IMAGE) run: $(IMAGE)
qemu-system-i386 -cdrom $< -display none -serial stdio qemu-system-i386 -cdrom $< -display none -serial stdio
all: $(KERNEL)
clean: clean:
rm -f $(OBJS) rm -f $(OBJS)
rm -f $(IMAGE) rm -f $(IMAGE)
rm -f $(KERNEL) rm -f $(KERNEL)
rm -f $(SYSCALLPROC)
$(IMAGE): $(KERNEL) $(IMAGE): $(GRUBCFG) $(KERNEL) $(SYSCALLPROC)
grub-mkrescue rootfs -o $@ grub-mkrescue rootfs -o $@
$(KERNEL): $(OBJS) $(KERNEL): $(OBJS)
$(CC) -T linker.ld -o $@ -ffreestanding -nostdlib -lgcc $^ $(CC) -T linker.ld -o $@ -ffreestanding -nostdlib -lgcc $^
grub-file --is-x86-multiboot2 $@ grub-file --is-x86-multiboot2 $@
$(SYSCALLPROC): syscallproc.asm
nasm -f bin syscallproc.asm -o $@
%.c.o: %.c %.c.o: %.c
$(CC) -c $< -o $@ $(CFLAGS) $(CC) -c $< -o $@ $(CFLAGS)

3
rootfs/boot/grub/grub.cfg
View file

@ -1,5 +1,6 @@
set timeout=0 set timeout=0
menuentry "KernelMQ" { menuentry "KernelMQ" {
multiboot2 /boot/kernelmq.multiboot2 hello kernel multiboot2 /boot/kernelmq.multiboot2
module2 /boot/syscallproc
} }

4
src/init.c
View file

@ -26,4 +26,8 @@ void init(const struct KernelMQ_Info *const kinfo_ptr)
paging_identity(); // Still need 1:1 for lapic and video mem and such. paging_identity(); // Still need 1:1 for lapic and video mem and such.
paging_mapkernel(&kinfo); paging_mapkernel(&kinfo);
paging_load(); paging_load();
if (kinfo.modules_count > 0) {
tasks_switch_to_user(kinfo.modules[0].base);
}
} }

10
src/syscall.c
View file

@ -7,16 +7,18 @@ static void syscall_do_exit(struct IsrRegisters regs);
void syscall_handler(const struct IsrRegisters regs) void syscall_handler(const struct IsrRegisters regs)
{ {
const unsigned int id = regs.eax; const unsigned int id = regs.eax << 16 >> 16;
logger_info_from("syscall", "number %u", id);
switch (id) { switch (id) {
case KERNELMQ_SYSCALL_EXIT: return syscall_do_exit(regs); case KERNELMQ_SYSCALL_EXIT: return syscall_do_exit(regs);
} }
logger_info_from("syscall", "number %u", id);
} }
void syscall_do_exit(const struct IsrRegisters regs) void syscall_do_exit(const struct IsrRegisters regs)
{ {
logger_warn_from("syscall", "process try to exit with error code %u, haha", regs.ebx); const unsigned int exit_code = regs.ebx << 16 >> 16;
logger_warn_from("syscall", "process try to exit with error code %u, haha", exit_code);
} }

28
syscallproc.asm Normal file
View file

@ -0,0 +1,28 @@
main:
xor eax, eax
xor ebx, ebx
int 0x80
xor eax, eax
mov ebx, 1
int 0x80
mov eax, 1
xor ebx, ebx
int 0x80
mov eax, 2
xor ebx, ebx
int 0x80
mov eax, 256
xor ebx, ebx
int 0x80
mov eax, 257
xor ebx, ebx
int 0x80
mov eax, 258
xor ebx, ebx
int 0x80