tb Fix handling CTRL+S

.gdbinit

@@ -0,0 +1 @@
+target remote :1234

.gitignore

@@ -1,5 +1,4 @@
 /limine
 /iso_root
-/base_root
 *.iso
 *.img

Makefile

@@ -1,49 +1,47 @@
-.PHONY: all clean prepare cleanall iso base
+.PHONY: clean prepare cleanall iso base kernel user test
 
-all:
-	make -C kernel all
+ARCH ?= x86_64
+
+kernel:
+	make -C kernel ARCH=$(ARCH) ROOT=$(PWD) all
+
+user:
+	make -C user ARCH=$(ARCH) ROOT=$(PWD) all
+
+ulib:
+	make -C ulib ARCH=$(ARCH) ROOT=$(PWD) all
 
 prepare:
 	if [ ! -d limine ]; then \
-		mkdir limine; \
+		git clone https://github.com/limine-bootloader/limine.git --branch=v9.x-binary --depth=1; \
 		cd limine; \
-		git init; \
-		git remote add origin https://github.com/limine-bootloader/limine.git; \
-		git fetch origin 9246bb78f446962aae5b0a291db4be32f9866ba6; \
-		git reset --hard FETCH_HEAD; \
 		make; \
 	fi
+	if [ ! -d toolchain/binutils-gdb ]; then \
+		cd toolchain; \
+		git clone git://sourceware.org/git/binutils-gdb.git --depth=1; \
+		$(PWD)/scripts/build-binutils-gdb.sh; \
+		cd ..; \
+	fi
+	if [ ! -d toolchain/gcc ]; then \
+		cd toolchain; \
+		git clone https://gcc.gnu.org/git/gcc.git --depth=1; \
+		$(PWD)/scripts/build-gcc.sh; \
+		cd ..; \
+	fi
 
 cleanall:
 	make clean
 	rm -rf limine
-	rm -rf littlefs-fuse
 
 clean:
-	make -C kernel clean
+	make -C kernel ARCH=$(ARCH) ROOT=$(PWD) clean
+	make -C user ARCH=$(ARCH) ROOT=$(PWD) clean
+	make -C ulib ARCH=$(ARCH) ROOT=$(PWD) clean
 	rm -f mop2.iso base.img
 
 base:
-	@rm -f base.img
-	@rm -rf base_root
-	@mkdir -p base_root
-	mklittlefs -c base_root -b 4096 -s $$((1<<20)) base.img
+	./scripts/mkbaseimg.sh
 
 iso:
-	@rm -rf iso_root
-	@mkdir -p iso_root/boot
-	@cp -v kernel/mop2 iso_root/boot
-	@cp -v base.img iso_root
-	@mkdir -p iso_root/boot/limine
-	@cp -v limine.conf limine/limine-bios.sys limine/limine-bios-cd.bin \
-		limine/limine-uefi-cd.bin iso_root/boot/limine
-	@mkdir -p iso_root/EFI/BOOT
-	@cp -v limine/BOOTX64.EFI iso_root/EFI/BOOT
-	@cp -v limine/BOOTIA32.EFI iso_root/EFI/BOOT
-	@xorriso -as mkisofs -R -r -J -b boot/limine/limine-bios-cd.bin \
-		-no-emul-boot -boot-load-size 4 -boot-info-table -hfsplus \
-		-apm-block-size 2048 --efi-boot boot/limine/limine-uefi-cd.bin \
-		-efi-boot-part --efi-boot-image --protective-msdos-label \
-		iso_root -o mop2.iso
-	@./limine/limine bios-install mop2.iso
-
+	./scripts/mkiso.sh

base/bin/.gitignore

@@ -0,0 +1,3 @@
+*
+!.gitignore
+!.gitkeep

base/scripts/init.tb

@@ -0,0 +1,3 @@
+print 'this is an init script!'
+base:/bin/pctl ls
+base:/bin/tb -m interactive -preload base:/scripts/rc.tb

base/scripts/rc.tb

@@ -0,0 +1,3 @@
+mkalias pctl base:/bin/pctl
+mkalias tb base:/bin/tb
+mkalias fs base:/bin/fs

devel.sh

@@ -1,3 +0,0 @@
-#!/bin/sh
-
-make -B && make base && make iso

dlmalloc/malloc.h

@@ -0,0 +1,12 @@
+#ifndef MALLOC_MALLOC_H_
+#define MALLOC_MALLOC_H_
+
+#include <stddef.h>
+
+void *dlmalloc(size_t);
+void dlfree(void *);
+void *dlcalloc(size_t, size_t);
+void *dlrealloc(void *, size_t);
+void *dlrealloc_in_place(void *, size_t);
+
+#endif // MALLOC_MALLOC_H_

kernel/Makefile

@@ -1,19 +1,23 @@
+include $(ROOT)/mk/grabsrc.mk
+
 .PHONY: all clean
 
-ARCH ?= x86_64
 PUTCHAR_ ?= fb
 
 CFLAGS := -ffreestanding -Wall -Wextra -g -fcommon -nostdinc
 
 CFLAGS += -I. \
-					-I../limine \
-					-I./std/include \
-					-I./flanterm/src \
-					-DPRINTF_INCLUDE_CONFIG_H=1 \
-					-DLFS_NO_ASSERT \
-					-DLFS_NO_DEBUG \
-					-DLFS_NO_WARN \
-					-DLFS_NO_ERROR
+          -I$(ROOT)/limine \
+          -I$(ROOT)/std/include \
+          -I./std \
+          -I./flanterm/src \
+					-I$(ROOT)/share \
+          -DPRINTF_INCLUDE_CONFIG_H=1 \
+          -DLFS_NO_ASSERT \
+          -DLFS_NO_DEBUG \
+          -DLFS_NO_WARN \
+          -DLFS_NO_ERROR \
+          -DUACPI_BAREBONES_MODE
 
 ifeq ($(PUTCHAR_),fb)
 CFLAGS += -DPUTCHAR_=PUTCHAR_FB
@@ -24,36 +28,42 @@ endif
 include arch/$(ARCH)/$(ARCH).mk
 include extconf/extra.mk
 
-LDFLAGS := -nostdlib -static -T arch/$(ARCH)/link.ld $(shell $(CC) -print-libgcc-file-name)
+LDFLAGS += -nostdlib -static -T arch/$(ARCH)/link.ld $(shell $(CC) -print-libgcc-file-name)
 
-SRCFILES := $(wildcard *.c) \
-	$(wildcard printf/*.c) \
-	$(wildcard bitmap/*.c) \
-	$(wildcard pmm/*.c) \
-	$(wildcard bootinfo/*.c) \
-	$(wildcard spinlock/*.c) \
-	$(wildcard term/*.c) \
-	$(wildcard vmm/*.c) \
-	$(wildcard dlmalloc/*.c) \
-	$(wildcard vfs/*.c) \
-	$(wildcard storedev/*.c) \
-	$(wildcard util/*.c) \
-	$(wildcard fs/kvfs/*.c) \
-	$(wildcard fs/littlefs/*.c) \
-	$(wildcard fs/portlfs/*.c) \
-	$(wildcard baseimg/*.c) \
-	$(wildcard hal/*.c) \
-	$(wildcard hal/$(ARCH)/*.c) \
-	$(wildcard hal/$(ARCH)/*.S) \
-	$(wildcard paging/$(ARCH)/*.c) \
-	$(wildcard paging/*.c) \
-	$(wildcard *.S) \
-	$(wildcard std/*.c) \
-	$(wildcard flanterm/src/*.c) \
-	$(wildcard flanterm/src/flanterm_backends/*.c)
-CFILES := $(filter %.c,$(SRCFILES))
-ASFILES := $(filter %.S,$(SRCFILES))
-OBJ := $(patsubst %.c,%.o,$(CFILES)) $(patsubst %.S,%.o,$(ASFILES))
+SRCFILES :=
+
+SRCFILES += $(call GRABSRC, \
+						  . \
+              printf \
+              bitmap \
+              pmm \
+              bootinfo \
+              spinlock \
+              term \
+              dlmalloc \
+              vfs \
+              storedev \
+              util \
+              fs/kvfs \
+              fs/littlefs \
+              fs/portlfs \
+              baseimg \
+              proc \
+              hal \
+              hal/$(ARCH) \
+              std \
+              flanterm/src \
+              flanterm/src/flanterm_backends \
+              syscall \
+							path \
+							rbuf \
+							ipc/pipe \
+							dev \
+            )
+
+CFILES  := $(call GET_CFILES, $(SRCFILES))
+ASFILES := $(call GET_ASFILES, $(SRCFILES))
+OBJ := $(call GET_OBJ, $(SRCFILES))
 
 %.o: %.c
 	$(CC) $(CFLAGS) -c $< -o $@

kernel/arch/x86_64/x86_64.mk

@@ -1,5 +1,4 @@
-CC := x86_64-elf-gcc
-LD := x86_64-elf-ld
+include $(ROOT)/mk/arch/toolchain-x86_64.mk
 
 CFLAGS += -m64 \
 					-fPIE \
@@ -12,7 +11,7 @@ CFLAGS += -m64 \
 					-mno-red-zone \
 					-fno-stack-protector \
 					-fno-stack-check \
-					-fno-lto
+					-Os \
 
 LDFLAGS += -m elf_x86_64 \
 					-pie \

kernel/atomic.h

@@ -0,0 +1,6 @@
+#ifndef ATOMIC_H_
+#define ATOMIC_H_
+
+#define ATOMIC(X) _Atomic(X)
+
+#endif // ATOMIC_H_

kernel/baseimg/baseimg.c

@@ -32,7 +32,7 @@ void baseimg_init(void) {
     hal_hang();
   } else {
     LOG("baseimg", "base.img found\n");
-    LOG("baseimg", "addr = %p, size = %lld\n", baseimg->address, baseimg->size);
+    LOG("baseimg", "addr = %p, size = %lu\n", baseimg->address, baseimg->size);
     for (size_t i = 0; i < 30; i++) {
       kprintf("%02X ", ((uint8_t *)(baseimg->address))[i]);
       if (i > 0 && (i + 1) % 10 == 0) {

kernel/bitmap/bitmap.c

@@ -2,8 +2,8 @@
 #include <stddef.h>
 #include <stdbool.h>
 #include "bitmap.h"
-
-#define DIV_ROUNDUP(num, div) ((num + div - 1) / div)
+#include "util/util.h"
+#include "kprintf.h"
 
 void *bitmap_toptr(BitMap *bm, size_t block) {
   uint8_t *ptr = (uint8_t *)(bm->mem_start + (block * BITMAP_BLOCK_SIZE));
@@ -17,12 +17,12 @@ size_t bitmap_toblock(BitMap *bm, void *ptr) {
 
 size_t bitmap_toblock_roundup(BitMap *bm, void *ptr) {
   uint8_t *p = ptr;
-  return (size_t)DIV_ROUNDUP((size_t)(p - bm->mem_start), BITMAP_BLOCK_SIZE);
+  return (size_t)_DIV_ROUNDUP((size_t)(p - bm->mem_start), BITMAP_BLOCK_SIZE);
 }
 
 size_t bitmap_calcsize(size_t total) {
-  size_t nblocks = DIV_ROUNDUP(total, BITMAP_BLOCK_SIZE);
-  size_t nbytes = DIV_ROUNDUP(nblocks, 8);
+  size_t nblocks = _DIV_ROUNDUP(total, BITMAP_BLOCK_SIZE);
+  size_t nbytes = _DIV_ROUNDUP(nblocks, 8);
   return nbytes;
 }
 
@@ -59,7 +59,7 @@ void bitmap_markregion(BitMap *bm, void *baseptr, size_t size, bool is_used) {
 
   if (is_used) {
     base = bitmap_toblock(bm, baseptr);
-    size1 = DIV_ROUNDUP(size, BITMAP_BLOCK_SIZE);
+    size1 = _DIV_ROUNDUP(size, BITMAP_BLOCK_SIZE);
   } else {
     base = bitmap_toblock(bm, baseptr);
     size1 = size / BITMAP_BLOCK_SIZE;
@@ -105,13 +105,3 @@ void *bitmap_alloc(BitMap *bm, size_t blocks) {
 void bitmap_free(BitMap *bm, void *base, size_t blocks) {
   bitmap_markregion(bm, base, BITMAP_BLOCK_SIZE * blocks, 0);
 }
-
-size_t bitmap_allocpageframe(BitMap *bm) {
-  size_t pickedreg = bitmap_freeregion(bm, 1);
-  bitmap_markblocks(bm, pickedreg, 1, 1);
-  return (bm->mem_start + (pickedreg * BITMAP_BLOCK_SIZE));
-}
-
-void bitmap_freepageframe(BitMap *bm, void *addr) {
-  bitmap_markregion(bm, addr, BITMAP_BLOCK_SIZE * 1, 0);
-}

kernel/bitmap/bitmap.h

@@ -5,6 +5,8 @@
 #include <stddef.h>
 #include <stdbool.h>
 
+#include "hal/hal.h"
+
 typedef struct {
   uint8_t *map;
   size_t nblocks;
@@ -12,11 +14,10 @@ typedef struct {
   size_t alloc_blocks;
   size_t last_deep_frag;
   uintptr_t mem_start;
-  bool init;
 } BitMap;
 
 #define BITMAP_BLOCKS_PER_BYTE 8
-#define BITMAP_BLOCK_SIZE 0x1000
+#define BITMAP_BLOCK_SIZE HAL_PAGE_SIZE
 #define BITMAP_INVALID_BLOCK ((size_t)-1)
 
 void *bitmap_toptr(BitMap *bm, size_t block);
@@ -30,7 +31,5 @@ void bitmap_markregion(BitMap *bm, void *baseptr, size_t size, bool is_used);
 size_t bitmap_freeregion(BitMap *bm, size_t blocks);
 void *bitmap_alloc(BitMap *bm, size_t blocks);
 void bitmap_free(BitMap *bm, void *base, size_t blocks);
-size_t bitmap_allocpageframe(BitMap *bm);
-void bitmap_freepageframe(BitMap *bm, void *addr);
 
 #endif // BITMAP_BITMAP_H_

kernel/bootinfo/bootinfo.c

@@ -6,68 +6,46 @@
 
 BootInfo BOOT_INFO;
 
-static volatile struct limine_paging_mode_request PAGING_REQ = {
+#define DEFINE_REQ(partname, partid) \
+  static volatile struct limine_##partname##_request partname##_req = \
+    { .id = LIMINE_##partid##_REQUEST, .revision = 0 }
+
+static volatile struct limine_paging_mode_request paging_req = {
   .id = LIMINE_PAGING_MODE_REQUEST,
   .revision = 0,
-#if defined(__x86_64__)
   .mode = LIMINE_PAGING_MODE_X86_64_4LVL,
-#else
-# error "Paging mode is unknown for this architecture"
-#endif
 };
 
-static volatile struct limine_kernel_address_request KERN_ADDR_REQ = {
-  .id = LIMINE_KERNEL_ADDRESS_REQUEST, .revision = 0,
-};
-
-static volatile struct limine_hhdm_request HHDM_REQ = {
-  .id = LIMINE_HHDM_REQUEST, .revision = 0,
-};
-
-static volatile struct limine_memmap_request MEMMAP_REQ = {
-  .id = LIMINE_MEMMAP_REQUEST, .revision = 0,
-};
-
-static volatile struct limine_smp_request SMP_REQ = {
-  .id = LIMINE_SMP_REQUEST, .revision = 0,
-};
-
-static volatile struct limine_rsdp_request RSDP_REQ = {
-  .id = LIMINE_RSDP_REQUEST, .revision = 0,
-};
-
-static volatile struct limine_framebuffer_request FB_REQ = {
-  .id = LIMINE_FRAMEBUFFER_REQUEST, .revision = 0,
-};
-
-static volatile struct limine_module_request MODULE_REQ = {
-  .id = LIMINE_MODULE_REQUEST, .revision = 0,
-};
+DEFINE_REQ(kernel_address, KERNEL_ADDRESS);
+DEFINE_REQ(hhdm, HHDM);
+DEFINE_REQ(memmap, MEMMAP);
+DEFINE_REQ(smp, SMP);
+DEFINE_REQ(rsdp, RSDP);
+DEFINE_REQ(framebuffer, FRAMEBUFFER);
+DEFINE_REQ(module, MODULE);
 
 void bootinfo_init(void) {
-  if (FB_REQ.response == NULL || FB_REQ.response->framebuffer_count < 1) {
+  if (framebuffer_req.response == NULL || framebuffer_req.response->framebuffer_count < 1) {
     hal_hang();
   }
-  BOOT_INFO.fb = FB_REQ.response->framebuffers[0];
+  BOOT_INFO.fb = framebuffer_req.response->framebuffers[0];
 
-  struct limine_module_response *modulesres= MODULE_REQ.response;
+  struct limine_module_response *modulesres= module_req.response;
   BOOT_INFO.modules = modulesres;
 
-  struct limine_paging_mode_response *pagingres = PAGING_REQ.response;
-#if defined(__x86_64__)
+  struct limine_paging_mode_response *pagingres = paging_req.response;
   if (pagingres->mode != LIMINE_PAGING_MODE_X86_64_4LVL) {
-#endif
     hal_hang();
   }
 
-  struct limine_hhdm_response *hhdmres = HHDM_REQ.response;
+  struct limine_hhdm_response *hhdmres = hhdm_req.response;
   BOOT_INFO.hhdm_off = hhdmres->offset;
 
-  struct limine_kernel_address_response *kernaddrres = KERN_ADDR_REQ.response;
+  struct limine_kernel_address_response *kernaddrres = kernel_address_req.response;
   BOOT_INFO.kern_virtbase = kernaddrres->virtual_base;
   BOOT_INFO.kern_physbase = kernaddrres->physical_base;
 
-  struct limine_memmap_response *memmapres = MEMMAP_REQ.response;
+  struct limine_memmap_response *memmapres = memmap_req.response;
   BOOT_INFO.memmap_entries = memmapres->entries;
   BOOT_INFO.memmap_entrycount = memmapres->entry_count;
 
@@ -79,7 +57,7 @@ void bootinfo_init(void) {
     }
   }
 
-  struct limine_smp_response *smpres = SMP_REQ.response;
+  struct limine_smp_response *smpres = smp_req.response;
   BOOT_INFO.smp = smpres;
 
   BOOT_INFO.smp_bspindex = (uint64_t)(-1);
@@ -93,6 +71,6 @@ void bootinfo_init(void) {
     hal_hang();
   }
 
-  struct limine_rsdp_response *rsdpres = RSDP_REQ.response;
+  struct limine_rsdp_response *rsdpres = rsdp_req.response;
   BOOT_INFO.rsdp = (size_t)rsdpres->address - BOOT_INFO.hhdm_off;
 }

kernel/bootinfo/bootinfo.h

@@ -23,6 +23,7 @@ typedef struct {
   uint64_t smp_bspindex;
   LIMINE_PTR(struct limine_framebuffer *) fb;
   LIMINE_PTR(struct limine_module_response *) modules;
+  LIMINE_PTR(struct limine_executable_file_response *) exec;
 } BootInfo;
 
 extern BootInfo BOOT_INFO;

kernel/compiler/attr.h

@@ -1,6 +1,9 @@
 #ifndef COMPILER_ATTR_H_
 #define COMPILER_ATTR_H_
 
-#define PACKED __attribute__((packed))
+#define PACKED      __attribute__((packed))
+#define ALIGNED(x)  __attribute__((aligned((x))))
+#define NORETURN    __attribute__((noreturn))
+#define UNUSED      __attribute__((unused))
 
 #endif // COMPILER_ATTR_H_

kernel/compiler/builtins.h

@@ -0,0 +1,6 @@
+#ifndef COMPILER_BUILTINS_H_
+#define COMPILER_BUILTINS_H_
+
+#define unreachable() __builtin_unreachable()
+
+#endif // COMPILER_BUILTINS_H_

kernel/dev/dev.c

@@ -0,0 +1,22 @@
+#include <stdint.h>
+#include <stddef.h>
+#include "spinlock/spinlock.h"
+#include "dev.h"
+#include "hshtb.h"
+#include "hal/hal.h"
+#include "termdev.h"
+#include "ps2kbdev.h"
+#include "serialdev.h"
+#include "fbdev.h"
+
+DevTable DEVTABLE;
+
+void dev_init(void) {
+  hal_memset(&DEVTABLE, 0, sizeof(DEVTABLE));
+  spinlock_init(&DEVTABLE.spinlock);
+
+  termdev_init();
+  ps2kbdev_init();
+  serialdev_init();
+  fbdev_init();
+}

kernel/dev/dev.h

@@ -0,0 +1,28 @@
+#ifndef DEV_DEV_H_
+#define DEV_DEV_H_
+
+#include <stdint.h>
+#include "spinlock/spinlock.h"
+
+#define DEV_FNS_MAX 32
+
+typedef int32_t (*DevFn)(uint8_t *buffer, size_t len, void *extra);
+
+typedef struct {
+  int _hshtbstate;
+  char ident[0x100];
+  DevFn fns[DEV_FNS_MAX];
+  SpinLock spinlock;
+} Dev;
+
+
+typedef struct {
+  SpinLock spinlock;
+  Dev devs[0x100];
+} DevTable;
+
+extern DevTable DEVTABLE;
+
+void dev_init(void);
+
+#endif // DEV_DEV_H_

kernel/dev/fbdev.c

@@ -0,0 +1,29 @@
+#include <stdint.h>
+#include <stddef.h>
+#include "fbdev.h"
+#include "dev.h"
+#include "sysdefs/devctl.h"
+#include "hshtb.h"
+#include "spinlock/spinlock.h"
+#include "util/util.h"
+#include "hal/hal.h"
+#include "bootinfo/bootinfo.h"
+#include "errors.h"
+
+int32_t fbdev_getinfo(uint8_t *buffer, size_t len, void *extra) {
+  FbDevGetInfo info = {
+    .w = BOOT_INFO.fb->width,
+    .h = BOOT_INFO.fb->height,
+    .margin = 20,
+    .fontw = 8,
+    .fonth = 16,
+  };
+  hal_memcpy(buffer, &info, sizeof(info));
+  return E_OK;
+}
+
+void fbdev_init(void) {
+  Dev *fbdev;
+  HSHTB_ALLOC(DEVTABLE.devs, ident, "fbdev", fbdev);
+  fbdev->fns[DEV_FBDEV_GETINFO] = &fbdev_getinfo;
+}

kernel/dev/fbdev.h

@@ -0,0 +1,7 @@
+#ifndef DEV_FBDEV_H_
+#define DEV_FBDEV_H_
+
+int32_t fbdev_getinfo(uint8_t *buffer, size_t len, void *extra);
+void fbdev_init(void);
+
+#endif // DEV_FBDEV_H_

kernel/dev/ps2kbdev.c

@@ -0,0 +1,256 @@
+#include <stdint.h>
+#include <stddef.h>
+#include "kprintf.h"
+#include "hal/hal.h"
+#include "ps2kbdev.h"
+#include "dev.h"
+#include "errors.h"
+#include "dlmalloc/malloc.h"
+#include "util/util.h"
+#include "hshtb.h"
+#include "sysdefs/devctl.h"
+#include "proc/proc.h"
+
+#define KB_CTL_STATUS   0x64
+#define KB_DATA_IN_BUF  0x01
+#define KB_DATA         0x60
+
+#define KB_SHIFT    (1<<0)
+#define KB_CTL      (1<<1)
+#define KB_ALT      (1<<2)
+
+#define KB_CAPSLOCK (1<<3)
+#define KB_NUMLOCK  (1<<4)
+#define KB_SCRLLOCK (1<<5)
+#define KB_E0ESC    (1<<6)
+
+#define KB_HOME     0xe0
+#define KB_END      0xe1
+#define KB_UP       0xe2
+#define KB_DOWN     0xe3
+#define KB_LEFT     0xe4
+#define KB_RIGHT    0xe5
+#define KB_PAGEUP   0xe6
+#define KB_PAGEDN   0xe7
+#define KB_INSERT   0xe8
+#define KB_DELETE   0xe9
+
+#define C(x) ((x)-'@')
+
+static uint8_t shiftcode[0x100] = {
+  [0x1d] KB_CTL,
+  [0x2a] KB_SHIFT,
+  [0x36] KB_SHIFT,
+  [0x38] KB_ALT,
+  [0x9d] KB_CTL,
+  [0xb8] KB_ALT,
+};
+
+static uint8_t togglecode[0x100] = {
+  [0x3a] KB_CAPSLOCK,
+  [0x45] KB_NUMLOCK,
+  [0x46] KB_SCRLLOCK,
+};
+
+static uint8_t normalmap[0x100] = {
+  0x0,  0x1b, '1', '2',  '3', '4', '5',  '6',
+  '7',  '8', '9', '0',  '-', '=',  '\b', '\t',
+  'q',  'w', 'e', 'r',  't', 'y',  'u',  'i',
+  'o',  'p', '[', ']',  '\n', 0x0, 'a',  's',
+  'd',  'f', 'g', 'h',  'j',  'k', 'l',  ';',
+  '\'', '`', 0x0, '\\', 'z',  'x', 'c',  'v',
+  'b',  'n', 'm', ',',  '.',  '/', 0x0,  '*',
+  0x0,  ' ', 0x0, 0x0,  0x0,  0x0, 0x0,  0x0,
+  0x0,  0x0, 0x0, 0x0,  0x0,  0x0, 0x0,  '7',
+  '8',  '9', '-', '4',  '5',  '6', '+',  '1',
+  '2',  '3', '0', '.',  0x0,  0x0, 0x0,  0x0,
+  [0x9c] '\n',
+  [0xb5] '/',
+  [0xc8] KB_UP,     [0xd0] KB_DOWN,
+  [0xc9] KB_PAGEUP, [0xd1] KB_PAGEDN,
+  [0xcb] KB_LEFT,   [0xcd] KB_RIGHT,
+  [0x97] KB_HOME,   [0xcf] KB_END,
+  [0xd2] KB_INSERT, [0xd3] KB_DELETE,
+};
+
+static uint8_t shiftmap[256] = {
+  0x0,  033,'!',  '@',  '#',  '$',  '%',  '^',
+  '&', '*', '(',  ')',  '_',  '+',  '\b', '\t',
+  'Q', 'W', 'E',  'R',  'T',  'Y',  'U',  'I',
+  'O', 'P', '{',  '}',  '\n', 0x0,   'A',  'S',
+  'D', 'F', 'G',  'H',  'J',  'K',  'L',  ':',
+  '"', '~', 0x0,   '|',  'Z',  'X',  'C',  'V',
+  'B', 'N', 'M',  '<',  '>',  '?',  0x0,   '*', 
+  0x0, ' ', 0x0,   0x0,   0x0,   0x0,   0x0,   0x0,
+  0x0, 0x0, 0x0,   0x0,   0x0,   0x0,   0x0,   '7', 
+  '8', '9', '-',  '4',  '5',  '6',  '+',  '1',
+  '2', '3', '0',  '.',  0x0,   0x0,   0x0,   0x0,
+  [0x9C] '\n',
+  [0xB5] '/', 
+  [0xc8] KB_UP,     [0xd0] KB_DOWN,
+  [0xc9] KB_PAGEUP, [0xd1] KB_PAGEDN,
+  [0xcb] KB_LEFT,   [0xcd] KB_RIGHT,
+  [0x97] KB_HOME,   [0xcf] KB_END,
+  [0xd2] KB_INSERT, [0xd3] KB_DELETE,
+};
+
+static uint8_t ctlmap[256] =
+{
+  0x0,      0x0,      0x0,      0x0,      0x0,      0x0,      0x0,      0x0,
+  0x0,      0x0,      0x0,      0x0,      0x0,      0x0,      0x0,      0x0,
+  C('Q'),  C('W'),  C('E'),  C('R'),  C('T'),  C('Y'),  C('U'),  C('I'),
+  C('O'),  C('P'),  0x0,      0x0,      '\r',    0x0,      C('A'),  C('S'),
+  C('D'),  C('F'),  C('G'),  C('H'),  C('J'),  C('K'),  C('L'),  0x0,
+  0x0,      0x0,      0x0,      C('\\'), C('Z'),  C('X'),  C('C'),  C('V'),
+  C('B'),  C('N'),  C('M'),  0x0,      0x0,      C('/'),  0x0,      0x0,
+  [0x9C] '\r',  
+  [0xB5] C('/'),
+  [0xc8] KB_UP,     [0xd0] KB_DOWN,
+  [0xc9] KB_PAGEUP, [0xd1] KB_PAGEDN,
+  [0xcb] KB_LEFT,   [0xcd] KB_RIGHT,
+  [0x97] KB_HOME,   [0xcf] KB_END,
+  [0xd2] KB_INSERT, [0xd3] KB_DELETE,
+};
+
+int32_t ps2kb_intr(void) {
+  static uint8_t shift;
+  static uint8_t *charcode[4] = { normalmap, shiftmap, ctlmap, ctlmap };
+  uint32_t st, data, c;
+
+  st = io_in8(KB_CTL_STATUS);
+  if (!(st & KB_DATA_IN_BUF)) {
+    return -1;
+  }
+  data = io_in8(KB_DATA);
+
+  if (data == 0xe0) {
+    shift |= KB_E0ESC;
+    return 0;
+  } else if (data & 0x80) {
+    data = (shift & KB_E0ESC ? data : data & 0x7F);
+    shift &= ~(shiftcode[data] | KB_E0ESC);
+    return 0;
+  } else if (shift & KB_E0ESC) {
+    data |= 0x80;
+    shift &= ~KB_E0ESC;
+  }
+
+  shift |= shiftcode[data];
+  shift ^= togglecode[data];
+  c = charcode[shift & (KB_CTL | KB_SHIFT)][data];
+  if (shift & KB_CAPSLOCK) {
+    if ('a' <= c && c <= 'z') {
+      c += 'A' - 'a';
+    } else if ('A' <= c && c <= 'Z') {
+      c += 'a' - 'A';
+    }
+  }
+
+  return c;
+}
+
+typedef struct Ps2kbEvConsumer {
+  struct Ps2kbEvConsumer *next;
+  Proc *proc;
+  RBuf rbuf;
+} Ps2kbEvConsumer;
+
+struct {
+  SpinLock spinlock;
+  Ps2kbEvConsumer *list;
+} PS2KB_CONSUMERS = {0};
+
+int32_t ps2kbdev_readch(uint8_t *buffer, size_t len, void *extra) {
+  uint64_t pid = (uint64_t)buffer;
+  Proc *consproc = NULL;
+  spinlock_acquire(&PROCS.spinlock);
+  Proc *proc, *proctmp;
+  LL_FOREACH_SAFE(PROCS.procs, proc, proctmp) {
+    if (proc->pid == pid) {
+      consproc = proc;
+    }
+  }
+  spinlock_release(&PROCS.spinlock);
+
+  if (consproc == NULL) {
+    return E_INVALIDOPER;
+  }
+
+  uint8_t b;
+  int32_t r = -1;
+
+  spinlock_acquire(&PS2KB_CONSUMERS.spinlock);
+  Ps2kbEvConsumer *cons, *constmp;
+  LL_FOREACH_SAFE(PS2KB_CONSUMERS.list, cons, constmp) {
+    if (cons->proc == consproc) {
+      r = rbuf_pop(&cons->rbuf, &b);
+      break;
+    }
+  }
+  spinlock_release(&PS2KB_CONSUMERS.spinlock);
+
+  if (r == 0) {
+    return b;
+  } else {
+    return E_NOTYET;
+  }
+}
+
+#define CONSUMER_RBUF_MAX 0x400
+
+int32_t ps2kbdev_attchcons(uint8_t *buffer, size_t len, void *extra) {
+  uint64_t pid = (uint64_t)buffer;
+  spinlock_acquire(&PROCS.spinlock);
+  Proc *proc, *proctmp;
+  LL_FOREACH_SAFE(PROCS.procs, proc, proctmp) {
+    if (proc->pid == pid) {
+      Ps2kbEvConsumer *cons = dlmalloc(sizeof(*cons));
+      cons->proc = proc;
+      uint8_t *buf = dlmalloc(CONSUMER_RBUF_MAX);
+      rbuf_init(&cons->rbuf, buf, CONSUMER_RBUF_MAX);
+      spinlock_acquire(&PS2KB_CONSUMERS.spinlock);
+      LL_APPEND(PS2KB_CONSUMERS.list, cons);
+      spinlock_release(&PS2KB_CONSUMERS.spinlock);
+      break;
+    }
+  }
+  spinlock_release(&PROCS.spinlock);
+  return E_OK;
+}
+
+void ps2kbdev_intr(void) {
+  int32_t c = ps2kb_intr();
+  if (c >= 0) {
+    uint8_t b = c;
+    spinlock_acquire(&PS2KB_CONSUMERS.spinlock);
+    Ps2kbEvConsumer *cons, *constmp;
+    LL_FOREACH_SAFE(PS2KB_CONSUMERS.list, cons, constmp) {
+      bool found = false;
+      spinlock_acquire(&PROCS.spinlock);
+      Proc *proc, *proctmp;
+      LL_FOREACH_SAFE(PROCS.procs, proc, proctmp) {
+        if (proc == cons->proc) {
+          found = true;
+        }
+      }
+      if (!found) {
+        LL_REMOVE(PS2KB_CONSUMERS.list, cons);
+      }
+      spinlock_release(&PROCS.spinlock);
+
+      rbuf_push(&cons->rbuf, b);
+    }
+    spinlock_release(&PS2KB_CONSUMERS.spinlock);
+  }
+}
+
+void ps2kbdev_init(void) {
+  intr_attchhandler(&ps2kbdev_intr, INTR_IRQBASE+1);
+
+  Dev *ps2kbdev;
+  HSHTB_ALLOC(DEVTABLE.devs, ident, "ps2kbdev", ps2kbdev);
+  spinlock_init(&ps2kbdev->spinlock);
+  spinlock_init(&PS2KB_CONSUMERS.spinlock);
+  ps2kbdev->fns[DEV_PS2KBDEV_READCH] = &ps2kbdev_readch;
+  ps2kbdev->fns[DEV_PS2KBDEV_ATTCHCONS] = &ps2kbdev_attchcons;
+}

kernel/dev/ps2kbdev.h

@@ -0,0 +1,10 @@
+#ifndef DEV_PS2KBDEV_H_
+#define DEV_PS2KBDEV_H_
+
+#include <stdint.h>
+#include <stddef.h>
+#include "dev.h"
+
+void ps2kbdev_init(void);
+
+#endif // DEV_PS2KBDEV_H_

kernel/dev/serialdev.c

@@ -0,0 +1,81 @@
+#include <stdint.h>
+#include <stddef.h>
+#include "dev.h"
+#include "serialdev.h"
+#include "errors.h"
+#include "util/util.h"
+#include "hshtb.h"
+#include "sysdefs/devctl.h"
+#include "kprintf.h"
+#include "hal/hal.h"
+
+// https://wiki.osdev.org/Serial_Ports
+
+#define PORT 0x3f8
+
+void serial_init(void) {
+  io_out8(PORT+1, 0x00);
+  io_out8(PORT+3, 0x80);
+  io_out8(PORT+0, 0x03);
+  io_out8(PORT+1, 0x00);
+  io_out8(PORT+3, 0x03);
+  io_out8(PORT+2, 0xC7);
+  io_out8(PORT+4, 0x0B);
+  io_out8(PORT+4, 0x1E);
+  io_out8(PORT+0, 0xAE);
+
+  if (io_in8(PORT+0) != 0xAE) {
+    ERR("serial", "serial is faulty!\n");
+    return;
+  }
+
+  io_out8(PORT+4, 0x0F);
+}
+
+int serial_recvready(void) {
+  return io_in8(PORT+5) & 1;
+}
+
+uint8_t serial_recvb(void) {
+  return io_in8(PORT);
+}
+
+int serial_sendready(void) {
+  return io_in8(PORT+5) & 0x20;
+}
+
+void serial_sendb(uint8_t b) {
+  io_out8(PORT, b);
+}
+
+int32_t serialdev_sendb(uint8_t *buffer, size_t len, void *extra) {
+  (void)len; (void)extra;
+  serial_sendb(buffer[0]);
+  return E_OK;
+}
+
+int32_t serialdev_sendready(uint8_t *buffer, size_t len, void *extra) {
+  (void)buffer; (void)len; (void) extra;
+  return serial_sendready();
+}
+
+int32_t serialdev_recvb(uint8_t *buffer, size_t len, void *extra) {
+  (void)buffer; (void)len; (void)extra;
+  return serial_recvb();
+}
+
+int32_t serialdev_recvready(uint8_t *buffer, size_t len, void *extra) {
+  (void)buffer; (void)len; (void)extra;
+  return serial_recvready();
+}
+
+void serialdev_init(void) {
+  Dev *serialdev = NULL;
+  HSHTB_ALLOC(DEVTABLE.devs, ident, "serialdev", serialdev);
+  serialdev->fns[DEV_SERIALDEV_SENDB] = &serialdev_sendb;
+  serialdev->fns[DEV_SERIALDEV_SENDREADY] = &serialdev_sendready;
+  serialdev->fns[DEV_SERIALDEV_RECVB] = &serialdev_recvb;
+  serialdev->fns[DEV_SERIALDEV_RECVREADY] = &serialdev_recvready;
+  spinlock_init(&serialdev->spinlock);
+  serial_init();
+}

kernel/dev/serialdev.h

@@ -0,0 +1,10 @@
+#ifndef DEV_SERIALDEV_H_
+#define DEV_SERIALDEV_H_
+
+int32_t serialdev_sendb(uint8_t *buffer, size_t len, void *extra);
+int32_t serialdev_sendready(uint8_t *buffer, size_t len, void *extra);
+int32_t serialdev_recvb(uint8_t *buffer, size_t len, void *extra);
+int32_t serialdev_recvready(uint8_t *buffer, size_t len, void *extra);
+void serialdev_init(void);
+
+#endif // DEV_SERIALDEV_H_

kernel/dev/termdev.c

@@ -0,0 +1,22 @@
+#include <stdint.h>
+#include <stddef.h>
+#include "kprintf.h"
+#include "hal/hal.h"
+#include "termdev.h"
+#include "dev.h"
+#include "errors.h"
+#include "util/util.h"
+#include "hshtb.h"
+#include "sysdefs/devctl.h"
+
+int32_t termdev_putch(uint8_t *buffer, size_t len, void *extra) {
+  kprintf("%.*s", (int)len, (char *)buffer);
+  return E_OK;
+}
+
+void termdev_init(void) {
+  Dev *termdev = NULL;
+  HSHTB_ALLOC(DEVTABLE.devs, ident, "termdev", termdev);
+  termdev->fns[DEV_TERMDEV_PUTCH] = &termdev_putch;
+  spinlock_init(&termdev->spinlock);
+}

kernel/dev/termdev.h

@@ -0,0 +1,11 @@
+#ifndef DEV_TERMDEV_H_
+#define DEV_TERMDEV_H_
+
+#include <stdint.h>
+#include <stddef.h>
+#include "dev.h"
+
+int32_t termdev_putch(uint8_t *buffer, size_t len, void *extra);
+void termdev_init(void);
+
+#endif // DEV_TERMDEV_H_

kernel/dlmalloc/dlmalloc_port.inc

@@ -0,0 +1,73 @@
+// Config
+
+#include <stddef.h>
+#include "hal/hal.h"
+#include "spinlock/spinlock.h"
+#include "kprintf.h"
+#include "bitmap/bitmap.h"
+#include "util/util.h"
+#include "pmm/pmm.h"
+#include "malloc.h"
+#include "bootinfo/bootinfo.h"
+
+#define USE_DL_PREFIX 1
+#define LACKS_SYS_TYPES_H 1
+#define NO_MALLOC_STATS 1
+#define LACKS_ERRNO_H 1
+#define LACKS_TIME_H 1
+#define LACKS_STDLIB_H 1
+#define LACKS_SYS_MMAN_H 1
+#define LACKS_FCNTL_H 1
+#define LACKS_UNISTD_H 1
+#define LACKS_SYS_PARAM_H 1
+#define LACKS_STRINGS_H 1
+#define LACKS_SCHED_H 1
+#define HAVE_MMAP 0
+#define ABORT \
+  do { \
+    ERR("dlmalloc", "Aborting..."); \
+    hal_hang(); \
+  } while(0)
+#define MALLOC_FAILURE_ACTION
+#define HAVE_MORECORE 1
+#define USE_LOCKS 2
+#define malloc_getpagesize 0x1000
+#define EINVAL 0xdeadbeef
+#define ENOMEM 0xb16b00b5
+#define MORECORE_CONTIGUOUS 0
+
+#define MLOCK_T SpinLock
+
+int ACQUIRE_LOCK(SpinLock *sl) {
+  spinlock_acquire(sl);
+  return 0;
+}
+
+int RELEASE_LOCK(SpinLock *sl) {
+  spinlock_release(sl);
+  return 0;
+}
+
+int INITIAL_LOCK(SpinLock *sl) {
+  spinlock_init(sl);
+  return 0;
+}
+    
+static MLOCK_T malloc_global_mutex = { 0 };
+
+void *_last = 0;
+
+void *sbrk(long inc) {
+  if (inc < 0) {
+    return 0;
+  }
+  if (!inc) {
+    return _last;
+  }
+
+  uint64_t blocks = _DIV_ROUNDUP(inc, BITMAP_BLOCK_SIZE);
+  uint8_t *virt = VIRT(pmm_alloc(blocks));
+  hal_memset(virt, 0, blocks * BITMAP_BLOCK_SIZE);
+  _last = (void *)(virt + inc);
+  return virt;
+}

kernel/dlmalloc/malloc.c

@@ -0,0 +1 @@
+../../dlmalloc/malloc.c

kernel/dlmalloc/malloc.h

@@ -1,13 +0,0 @@
-#ifndef MALLOC_MALLOC_H_
-#define MALLOC_MALLOC_H_
-
-#include <stddef.h>
-
-void *dlmalloc(size_t);
-void dlfree(void *);
-void *dlcalloc(size_t, size_t);
-void *dlrealloc(void *, size_t);
-void *dlrealloc_in_place(void *, size_t);
-void dlmalloc_check(void);
-
-#endif // MALLOC_MALLOC_H_

kernel/dlmalloc/malloc.h

@@ -0,0 +1 @@
+../../dlmalloc/malloc.h

kernel/elf.h

@@ -0,0 +1,355 @@
+#ifndef ELF_H_
+#define ELF_H_
+
+#include <stdint.h>
+
+#define ELFCLASS64 2
+#define ELFDATA2LSB 1
+#define ELFOSABI_SYSV 0
+#define EM_X86_64 62
+
+#define SHT_NULL 0
+#define SHT_PROGBITS 1
+#define SHT_SYMTAB 2
+#define SHT_STRTAB 3
+#define SHT_RELA 4
+#define SHT_HASH 5
+#define SHT_DYNAMIC 6
+#define SHT_NOBITS 8
+#define SHT_DYNSYM 11
+
+#define SHF_WRITE 1
+#define SHF_ALLOC 2
+#define SHF_EXECINSTR 4
+
+typedef uint64_t Elf64_Addr;
+typedef uint64_t Elf64_Off;
+typedef uint16_t Elf64_Half;
+typedef uint32_t Elf64_Word;
+typedef int32_t Elf64_Sword;
+typedef uint64_t Elf64_Xword;
+typedef int64_t Elf64_Sxword;
+
+typedef uint32_t Elf32_Addr;
+typedef uint32_t Elf32_Off;
+typedef uint16_t Elf32_Half;
+typedef uint32_t Elf32_Word;
+typedef int32_t Elf32_Sword;
+typedef uint64_t Elf32_Xword;
+typedef int64_t Elf32_Sxword;
+
+#define EI_NIDENT (16)
+
+typedef struct {
+  unsigned char e_ident[EI_NIDENT]; /* ELF identification */
+  Elf32_Half e_type;                /* Object file type */
+  Elf32_Half e_machine;             /* Machine type */
+  Elf32_Word e_version;             /* Object file version */
+  Elf32_Addr e_entry;               /* Entry point address */
+  Elf32_Off e_phoff;                /* Program header offset */
+  Elf32_Off e_shoff;                /* Section header offset */
+  Elf32_Word e_flags;               /* Processor-specific flags */
+  Elf32_Half e_ehsize;              /* ELF header size */
+  Elf32_Half e_phentsize;           /* Size of program header entry */
+  Elf32_Half e_phnum;               /* Number of program header entries */
+  Elf32_Half e_shentsize;           /* Size of section header entry */
+  Elf32_Half e_shnum;               /* Number of section header entries */
+  Elf32_Half e_shstrndx;            /* Section name string table index */
+} Elf32_Ehdr;
+
+typedef struct {
+  unsigned char e_ident[EI_NIDENT]; /* ELF identification */
+  Elf64_Half e_type;                /* Object file type */
+  Elf64_Half e_machine;             /* Machine type */
+  Elf64_Word e_version;             /* Object file version */
+  Elf64_Addr e_entry;               /* Entry point address */
+  Elf64_Off e_phoff;                /* Program header offset */
+  Elf64_Off e_shoff;                /* Section header offset */
+  Elf64_Word e_flags;               /* Processor-specific flags */
+  Elf64_Half e_ehsize;              /* ELF header size */
+  Elf64_Half e_phentsize;           /* Size of program header entry */
+  Elf64_Half e_phnum;               /* Number of program header entries */
+  Elf64_Half e_shentsize;           /* Size of section header entry */
+  Elf64_Half e_shnum;               /* Number of section header entries */
+  Elf64_Half e_shstrndx;            /* Section name string table index */
+} Elf64_Ehdr;
+
+enum {
+  ET_NONE = 0,
+  ET_REL = 1,
+  ET_EXEC = 2,
+  ET_DYN = 3,
+  ET_CORE = 4,
+};
+
+enum { SHN_UNDEF = 0, SHN_ABS = 0xFFF1 };
+
+typedef struct {
+  Elf64_Word st_name;
+  unsigned char st_info;
+  unsigned char st_other;
+  Elf64_Half st_shndx;
+  Elf64_Addr st_value;
+  Elf64_Xword st_size;
+} Elf64_Sym;
+
+enum { STB_GLOBAL = 1, STB_WEAK = 2, STB_GNU_UNIQUE = 10 };
+
+enum { STT_OBJECT = 1, STT_FUNC = 2, STT_TLS = 6 };
+
+enum {
+  R_X86_64_NONE = 0,
+  R_X86_64_64 = 1,
+  R_X86_64_COPY = 5,
+  R_X86_64_GLOB_DAT = 6,
+  R_X86_64_JUMP_SLOT = 7,
+  R_X86_64_RELATIVE = 8,
+  R_X86_64_DTPMOD64 = 16,
+  R_X86_64_DTPOFF64 = 17,
+  R_X86_64_TPOFF64 = 18,
+};
+
+enum {
+  R_AARCH64_ABS64 = 257,
+  R_AARCH64_COPY = 1024,
+  R_AARCH64_GLOB_DAT = 1025,
+  R_AARCH64_JUMP_SLOT = 1026,
+  R_AARCH64_RELATIVE = 1027,
+  R_AARCH64_TLS_TPREL = 1030,
+  R_AARCH64_TLSDESC = 1031
+};
+
+typedef struct {
+  Elf64_Addr r_offset;
+  uint64_t r_info;
+} Elf64_Rel;
+
+typedef struct {
+  Elf64_Addr r_offset;
+  Elf64_Xword r_info;
+  Elf64_Sxword r_addend;
+} Elf64_Rela;
+
+static inline Elf64_Xword ELF64_R_SYM(Elf64_Xword info) { return info >> 32; }
+static inline Elf64_Xword ELF64_R_TYPE(Elf64_Xword info) {
+  return info & 0xFFFFFFFF;
+}
+
+enum {
+  PT_LOAD = 1,
+  PT_DYNAMIC = 2,
+  PT_INTERP = 3,
+  PT_NOTE = 4,
+  PT_PHDR = 6,
+  PT_TLS = 7,
+  PT_GNU_EH_FRAME = 0x6474E550,
+  PT_GNU_STACK = 0x6474E551,
+  PT_GNU_RELRO = 0x6474E552,
+  PT_GNU_PROPERTY = 0x6474E553,
+};
+
+enum { PF_X = 1, PF_W = 2, PF_R = 4 };
+
+typedef struct {
+  Elf64_Word p_type;    /* Type of segment */
+  Elf64_Word p_flags;   /* Segment attributes */
+  Elf64_Off p_offset;   /* Offset in file */
+  Elf64_Addr p_vaddr;   /* Virtual address in memory */
+  Elf64_Addr p_paddr;   /* Reserved */
+  Elf64_Xword p_filesz; /* Size of segment in file */
+  Elf64_Xword p_memsz;  /* Size of segment in memory */
+  Elf64_Xword p_align;  /* Alignment of segment */
+} Elf64_Phdr;
+
+enum {
+  DT_NULL = 0,
+  DT_NEEDED = 1,
+  DT_PLTRELSZ = 2,
+  DT_PLTGOT = 3,
+  DT_HASH = 4,
+  DT_STRTAB = 5,
+  DT_SYMTAB = 6,
+  DT_RELA = 7,
+  DT_RELASZ = 8,
+  DT_RELAENT = 9,
+  DT_STRSZ = 10,
+  DT_SYMENT = 11,
+  DT_INIT = 12,
+  DT_FINI = 13,
+  DT_SONAME = 14,
+  DT_RPATH = 15,
+  DT_SYMBOLIC = 16,
+  DT_REL = 17,
+  DT_BIND_NOW = 24,
+  DT_INIT_ARRAY = 25,
+  DT_FINI_ARRAY = 26,
+  DT_INIT_ARRAYSZ = 27,
+  DT_FINI_ARRAYSZ = 28,
+  DT_RUNPATH = 29,
+  DT_PLTREL = 20,
+  DT_DEBUG = 21,
+  DT_JMPREL = 23,
+  DT_FLAGS = 30,
+  DT_GNU_HASH = 0x6ffffef5,
+  DT_TLSDESC_PLT = 0x6ffffef6,
+  DT_TLSDESC_GOT = 0x6ffffef7,
+  DT_VERSYM = 0x6ffffff0,
+  DT_RELACOUNT = 0x6ffffff9,
+  DT_FLAGS_1 = 0x6ffffffb,
+  DT_VERDEF = 0x6ffffffc,
+  DT_VERDEFNUM = 0x6ffffffd,
+  DT_VERNEED = 0x6ffffffe,
+  DT_VERNEEDNUM = 0x6fffffff
+};
+
+enum {
+  // For DT_FLAGS.
+  DF_SYMBOLIC = 0x02,
+  DF_STATIC_TLS = 0x10,
+
+  // For DT_FLAGS_1.
+  DF_1_NOW = 0x00000001
+};
+
+typedef struct {
+  Elf32_Sword d_tag;
+  union {
+    Elf32_Word d_val;
+    Elf32_Addr d_ptr;
+  } d_un;
+} Elf32_Dyn;
+
+typedef struct {
+  Elf64_Sxword d_tag;
+  union {
+    Elf64_Xword d_val;
+    Elf64_Addr d_ptr;
+  } d_un;
+} Elf64_Dyn;
+
+typedef struct {
+  Elf32_Word sh_name;
+  Elf32_Word sh_type;
+  Elf32_Word sh_flags;
+  Elf32_Addr sh_addr;
+  Elf32_Off sh_offset;
+  Elf32_Word sh_size;
+  Elf32_Word sh_link;
+  Elf32_Word sh_info;
+  Elf32_Word sh_addralign;
+  Elf32_Word sh_entsize;
+} Elf32_Shdr;
+
+typedef struct {
+  Elf64_Word sh_name;
+  Elf64_Word sh_type;
+  Elf64_Xword sh_flags;
+  Elf64_Addr sh_addr;
+  Elf64_Off sh_offset;
+  Elf64_Xword sh_size;
+  Elf64_Word sh_link;
+  Elf64_Word sh_info;
+  Elf64_Xword sh_addralign;
+  Elf64_Xword sh_entsize;
+} Elf64_Shdr;
+
+typedef struct {
+  Elf32_Word n_namesz;
+  Elf32_Word n_descsz;
+  Elf32_Word n_type;
+} Elf32_Nhdr;
+
+typedef struct {
+  Elf64_Word n_namesz;
+  Elf64_Word n_descsz;
+  Elf64_Word n_type;
+} Elf64_Nhdr;
+
+/* ST_TYPE (subfield of st_info) values (symbol type) */
+#define STT_NOTYPE 0
+#define STT_OBJECT 1
+#define STT_FUNC 2
+#define STT_SECTION 3
+#define STT_FILE 4
+
+/* ST_BIND (subfield of st_info) values (symbol binding) */
+#define STB_LOCAL 0
+#define STB_GLOBAL 1
+#define STB_WEAK 2
+
+/* sh_type (section type) values */
+#define SHT_NULL 0
+#define SHT_PROGBITS 1
+#define SHT_SYMTAB 2
+#define SHT_STRTAB 3
+#define SHT_RELA 4
+#define SHT_NOBITS 8
+#define SHT_REL 9
+#define SHT_INIT_ARRAY 14
+#define SHT_FINI_ARRAY 15
+#define SHT_SYMTAB_SHNDX 18
+
+/* special section indices */
+#define SHN_UNDEF 0
+#define SHN_LORESERVE 0xff00
+#define SHN_COMMON 0xfff2
+#define SHN_XINDEX 0xffff
+#define SHN_HIRESERVE 0xff00
+
+/* values for e_machine */
+#define EM_NONE 0
+#define EM_SPARC 2
+#define EM_386 3
+#define EM_PPC 20
+#define EM_PPC64 21
+#define EM_X86_64 62
+
+/* e_indent constants */
+#define EI_MAG0 0
+#define ELFMAG0 0x7f
+
+#define EI_MAG1 1
+#define ELFMAG1 'E'
+
+#define EI_MAG2 2
+#define ELFMAG2 'L'
+
+#define EI_MAG3 3
+#define ELFMAG3 'F'
+
+#define EI_CLASS 4
+#define ELFCLASSNONE 0
+#define ELFCLASS32 1
+#define ELFCLASS64 2
+#define ELFCLASSNUM 3
+
+#define EI_DATA 5
+#define ELFDATANONE 0
+#define ELFDATA2LSB 1
+#define ELFDATA2MSB 2
+#define ELFDATANUM 3
+
+#define AT_NULL 0
+#define AT_IGNORE 1
+#define AT_EXECFD 2
+#define AT_PHDR 3
+#define AT_PHENT 4
+#define AT_PHNUM 5
+#define AT_PAGESZ 6
+#define AT_BASE 7
+#define AT_FLAGS 8
+#define AT_ENTRY 9
+#define AT_NOTELF 10
+#define AT_UID 11
+#define AT_EUID 12
+#define AT_GID 13
+#define AT_EGID 14
+
+typedef struct {
+  uint64_t entry;
+  uint64_t phdr;
+  uint64_t phent;
+  uint64_t phnum;
+} ElfAuxval;
+
+#endif // ELF_H_

kernel/errors.h

@@ -1,13 +0,0 @@
-#ifndef ERRORS_H_
-#define ERRORS_H_
-
-#define E_OK               0
-#define E_NOMEMORY        -1
-#define E_UNKNOWN_FSTYPE  -2
-#define E_NOENTRY         -3
-#define E_OUTOFBOUNDS     -4
-#define E_UNKNOWN_SDTYPE  -5
-#define E_TODO            -6
-#define E_GENERIC_ERROR   -7
-
-#endif // ERRORS_H_

kernel/fm-t-437.f16.h

@@ -0,0 +1,345 @@
+unsigned char FM_T_437_F16[] = {
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x7e, 0x81, 0x81, 0xa5, 0xa5, 0x81, 0x81,
+  0x81, 0xbd, 0x99, 0x81, 0x81, 0x7e, 0x00, 0x00, 0x00, 0x7e, 0xff, 0xff,
+  0xdb, 0xdb, 0xff, 0xff, 0xff, 0xc3, 0xe7, 0xff, 0xff, 0x7e, 0x00, 0x00,
+  0x00, 0x22, 0x22, 0x77, 0x7f, 0x7f, 0x7f, 0x7f, 0x3e, 0x3e, 0x1c, 0x1c,
+  0x08, 0x00, 0x00, 0x00, 0x00, 0x08, 0x1c, 0x1c, 0x3e, 0x3e, 0x7f, 0x7f,
+  0x3e, 0x3e, 0x1c, 0x1c, 0x08, 0x00, 0x00, 0x00, 0x00, 0x08, 0x1c, 0x1c,
+  0x1c, 0x08, 0x6b, 0x7f, 0x7f, 0x6b, 0x08, 0x1c, 0x3e, 0x00, 0x00, 0x00,
+  0x00, 0x08, 0x08, 0x1c, 0x3e, 0x7f, 0x7f, 0x7f, 0x7f, 0x2a, 0x08, 0x1c,
+  0x3e, 0x00, 0x00, 0x00, 0x00, 0x00, 0x18, 0x3c, 0x3c, 0x7e, 0x7e, 0x7e,
+  0x7e, 0x7e, 0x3c, 0x3c, 0x18, 0x00, 0x00, 0x00, 0xff, 0xff, 0xe7, 0xc3,
+  0xc3, 0x81, 0x81, 0x81, 0x81, 0x81, 0xc3, 0xc3, 0xe7, 0xff, 0xff, 0xff,
+  0x00, 0x00, 0x18, 0x24, 0x24, 0x42, 0x42, 0x42, 0x42, 0x42, 0x24, 0x24,
+  0x18, 0x00, 0x00, 0x00, 0xff, 0xff, 0xe7, 0xdb, 0xdb, 0xbd, 0xbd, 0xbd,
+  0xbd, 0xbd, 0xdb, 0xdb, 0xe7, 0xff, 0xff, 0xff, 0x00, 0x0f, 0x03, 0x05,
+  0x05, 0x08, 0x1c, 0x22, 0x41, 0x41, 0x41, 0x41, 0x22, 0x1c, 0x00, 0x00,
+  0x00, 0x1c, 0x22, 0x41, 0x41, 0x41, 0x41, 0x22, 0x1c, 0x08, 0x08, 0x3e,
+  0x08, 0x08, 0x00, 0x00, 0x00, 0x08, 0x0c, 0x0a, 0x0a, 0x09, 0x09, 0x09,
+  0x08, 0x08, 0x38, 0x78, 0x78, 0x30, 0x00, 0x00, 0x00, 0x3f, 0x21, 0x3f,
+  0x21, 0x21, 0x21, 0x21, 0x21, 0x21, 0x23, 0x67, 0xe7, 0xe2, 0x40, 0x00,
+  0x00, 0x49, 0x49, 0x2a, 0x36, 0x14, 0x22, 0xe3, 0x22, 0x14, 0x36, 0x2a,
+  0x49, 0x49, 0x00, 0x00, 0x00, 0x00, 0x40, 0x60, 0x70, 0x78, 0x7c, 0x7e,
+  0x7c, 0x78, 0x70, 0x60, 0x40, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0x06,
+  0x0e, 0x1e, 0x3e, 0x7e, 0x3e, 0x1e, 0x0e, 0x06, 0x02, 0x00, 0x00, 0x00,
+  0x00, 0x08, 0x1c, 0x2a, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x2a,
+  0x1c, 0x08, 0x00, 0x00, 0x00, 0x22, 0x22, 0x22, 0x22, 0x22, 0x22, 0x22,
+  0x22, 0x22, 0x00, 0x00, 0x22, 0x22, 0x00, 0x00, 0x00, 0x3f, 0x49, 0x49,
+  0x49, 0x49, 0x39, 0x09, 0x09, 0x09, 0x09, 0x09, 0x09, 0x09, 0x00, 0x00,
+  0x00, 0x3c, 0x42, 0x42, 0x40, 0x20, 0x58, 0x44, 0x22, 0x1a, 0x04, 0x02,
+  0x42, 0x42, 0x3c, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0xfe, 0xfe, 0xfe, 0xfe, 0x00, 0x00, 0x00, 0x08, 0x1c, 0x2a,
+  0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x2a, 0x1c, 0x08, 0x3e, 0x00, 0x00,
+  0x00, 0x08, 0x1c, 0x2a, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08,
+  0x08, 0x08, 0x00, 0x00, 0x00, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08,
+  0x08, 0x08, 0x08, 0x2a, 0x1c, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x04, 0x02, 0x7f, 0x02, 0x04, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x10, 0x20, 0x7f, 0x20, 0x10, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x40, 0x40, 0x40,
+  0x40, 0x40, 0x7e, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x24, 0x42, 0xff, 0x42, 0x24, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x08, 0x08, 0x1c, 0x1c, 0x3e, 0x3e, 0x7f, 0x7f,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x7f, 0x7f, 0x3e, 0x3e,
+  0x1c, 0x1c, 0x08, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x00, 0x00,
+  0x08, 0x08, 0x00, 0x00, 0x00, 0x24, 0x24, 0x24, 0x24, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x24, 0x24, 0x24,
+  0x7e, 0x24, 0x24, 0x24, 0x24, 0x24, 0x7e, 0x24, 0x24, 0x24, 0x00, 0x00,
+  0x00, 0x08, 0x1e, 0x2b, 0x28, 0x28, 0x28, 0x1c, 0x0a, 0x0a, 0x0a, 0x6a,
+  0x3c, 0x08, 0x00, 0x00, 0x00, 0x00, 0x32, 0x52, 0x54, 0x64, 0x08, 0x08,
+  0x10, 0x10, 0x26, 0x2a, 0x4a, 0x4c, 0x00, 0x00, 0x00, 0x00, 0x38, 0x44,
+  0x44, 0x44, 0x28, 0x18, 0x24, 0x45, 0x42, 0x42, 0x42, 0x3d, 0x00, 0x00,
+  0x00, 0x00, 0x04, 0x08, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x04, 0x08, 0x08, 0x10, 0x10, 0x10, 0x10,
+  0x10, 0x10, 0x10, 0x08, 0x08, 0x04, 0x00, 0x00, 0x00, 0x20, 0x10, 0x10,
+  0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x10, 0x10, 0x20, 0x00, 0x00,
+  0x00, 0x00, 0x08, 0x49, 0x2a, 0x1c, 0x1c, 0x7f, 0x1c, 0x1c, 0x2a, 0x49,
+  0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x08, 0x08, 0x08, 0x08, 0x3e,
+  0x08, 0x08, 0x08, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x18, 0x18, 0x08, 0x08, 0x10, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x3e, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x18, 0x18, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0x02,
+  0x04, 0x08, 0x08, 0x10, 0x10, 0x20, 0x20, 0x40, 0x80, 0x80, 0x00, 0x00,
+  0x00, 0x18, 0x24, 0x24, 0x42, 0x42, 0x42, 0x42, 0x42, 0x42, 0x42, 0x24,
+  0x24, 0x18, 0x00, 0x00, 0x00, 0x08, 0x18, 0x28, 0x08, 0x08, 0x08, 0x08,
+  0x08, 0x08, 0x08, 0x08, 0x08, 0x3e, 0x00, 0x00, 0x00, 0x3c, 0x42, 0x42,
+  0x42, 0x02, 0x04, 0x08, 0x10, 0x20, 0x20, 0x40, 0x40, 0x7e, 0x00, 0x00,
+  0x00, 0x3c, 0x42, 0x42, 0x02, 0x02, 0x02, 0x1c, 0x02, 0x02, 0x02, 0x42,
+  0x42, 0x3c, 0x00, 0x00, 0x00, 0x04, 0x0c, 0x0c, 0x14, 0x14, 0x24, 0x24,
+  0x44, 0x44, 0x44, 0x7e, 0x04, 0x04, 0x00, 0x00, 0x00, 0x7e, 0x40, 0x40,
+  0x40, 0x40, 0x7c, 0x02, 0x02, 0x02, 0x02, 0x42, 0x42, 0x3c, 0x00, 0x00,
+  0x00, 0x3c, 0x42, 0x42, 0x40, 0x40, 0x7c, 0x42, 0x42, 0x42, 0x42, 0x42,
+  0x42, 0x3c, 0x00, 0x00, 0x00, 0x7e, 0x42, 0x42, 0x42, 0x04, 0x04, 0x04,
+  0x04, 0x08, 0x08, 0x08, 0x08, 0x08, 0x00, 0x00, 0x00, 0x3c, 0x42, 0x42,
+  0x42, 0x42, 0x3c, 0x42, 0x42, 0x42, 0x42, 0x42, 0x42, 0x3c, 0x00, 0x00,
+  0x00, 0x3c, 0x42, 0x42, 0x42, 0x42, 0x42, 0x42, 0x3e, 0x02, 0x02, 0x42,
+  0x42, 0x3c, 0x00, 0x00, 0x00, 0x00, 0x00, 0x18, 0x18, 0x00, 0x00, 0x00,
+  0x00, 0x18, 0x18, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x18,
+  0x18, 0x00, 0x00, 0x00, 0x00, 0x18, 0x18, 0x08, 0x10, 0x20, 0x00, 0x00,
+  0x00, 0x00, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x20, 0x10, 0x08, 0x04,
+  0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x3c, 0x00,
+  0x00, 0x3c, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x40, 0x20,
+  0x10, 0x08, 0x04, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x00, 0x00, 0x00,
+  0x00, 0x3c, 0x42, 0x42, 0x42, 0x02, 0x04, 0x08, 0x08, 0x08, 0x00, 0x00,
+  0x08, 0x08, 0x00, 0x00, 0x00, 0x1e, 0x22, 0x41, 0x49, 0x55, 0x55, 0x55,
+  0x55, 0x55, 0x57, 0x4b, 0x20, 0x1f, 0x00, 0x00, 0x00, 0x18, 0x24, 0x42,
+  0x42, 0x42, 0x42, 0x42, 0x7e, 0x42, 0x42, 0x42, 0x42, 0x42, 0x00, 0x00,
+  0x00, 0x7c, 0x22, 0x22, 0x22, 0x22, 0x22, 0x3c, 0x22, 0x22, 0x22, 0x22,
+  0x22, 0x7c, 0x00, 0x00, 0x00, 0x1c, 0x22, 0x42, 0x40, 0x40, 0x40, 0x40,
+  0x40, 0x40, 0x40, 0x42, 0x22, 0x1c, 0x00, 0x00, 0x00, 0x78, 0x24, 0x22,
+  0x22, 0x22, 0x22, 0x22, 0x22, 0x22, 0x22, 0x22, 0x24, 0x78, 0x00, 0x00,
+  0x00, 0x7e, 0x40, 0x40, 0x40, 0x40, 0x40, 0x7c, 0x40, 0x40, 0x40, 0x40,
+  0x40, 0x7e, 0x00, 0x00, 0x00, 0x7e, 0x40, 0x40, 0x40, 0x40, 0x40, 0x7c,
+  0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x00, 0x00, 0x00, 0x1c, 0x22, 0x42,
+  0x40, 0x40, 0x40, 0x40, 0x4e, 0x42, 0x42, 0x42, 0x22, 0x1c, 0x00, 0x00,
+  0x00, 0x42, 0x42, 0x42, 0x42, 0x42, 0x42, 0x7e, 0x42, 0x42, 0x42, 0x42,
+  0x42, 0x42, 0x00, 0x00, 0x00, 0x1c, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08,
+  0x08, 0x08, 0x08, 0x08, 0x08, 0x1c, 0x00, 0x00, 0x00, 0x0e, 0x04, 0x04,
+  0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x44, 0x44, 0x44, 0x38, 0x00, 0x00,
+  0x00, 0x42, 0x42, 0x44, 0x44, 0x48, 0x50, 0x50, 0x68, 0x48, 0x44, 0x44,
+  0x42, 0x42, 0x00, 0x00, 0x00, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40,
+  0x40, 0x40, 0x40, 0x40, 0x40, 0x7e, 0x00, 0x00, 0x00, 0x41, 0x63, 0x63,
+  0x55, 0x55, 0x49, 0x49, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x00, 0x00,
+  0x00, 0x42, 0x42, 0x62, 0x62, 0x52, 0x52, 0x4a, 0x4a, 0x46, 0x46, 0x42,
+  0x42, 0x42, 0x00, 0x00, 0x00, 0x3c, 0x42, 0x42, 0x42, 0x42, 0x42, 0x42,
+  0x42, 0x42, 0x42, 0x42, 0x42, 0x3c, 0x00, 0x00, 0x00, 0x78, 0x44, 0x42,
+  0x42, 0x42, 0x44, 0x78, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x00, 0x00,
+  0x00, 0x3c, 0x42, 0x42, 0x42, 0x42, 0x42, 0x42, 0x42, 0x52, 0x4a, 0x44,
+  0x44, 0x3a, 0x00, 0x00, 0x00, 0x7c, 0x42, 0x42, 0x42, 0x42, 0x42, 0x7c,
+  0x48, 0x48, 0x44, 0x44, 0x42, 0x42, 0x00, 0x00, 0x00, 0x3c, 0x42, 0x42,
+  0x40, 0x40, 0x40, 0x3c, 0x02, 0x02, 0x02, 0x42, 0x42, 0x3c, 0x00, 0x00,
+  0x00, 0x7f, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08,
+  0x08, 0x08, 0x00, 0x00, 0x00, 0x42, 0x42, 0x42, 0x42, 0x42, 0x42, 0x42,
+  0x42, 0x42, 0x42, 0x42, 0x42, 0x3c, 0x00, 0x00, 0x00, 0x41, 0x41, 0x41,
+  0x41, 0x41, 0x41, 0x41, 0x22, 0x22, 0x22, 0x14, 0x1c, 0x08, 0x00, 0x00,
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+  0x24, 0x24, 0x27, 0x20, 0x3f, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x3f, 0x20, 0x27, 0x24, 0x24, 0x24,
+  0x24, 0x24, 0x24, 0x24, 0x24, 0x24, 0x24, 0x24, 0x24, 0x24, 0xe7, 0x00,
+  0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0xff, 0x00, 0xe7, 0x24, 0x24, 0x24, 0x24, 0x24, 0x24, 0x24,
+  0x24, 0x24, 0x24, 0x24, 0x24, 0x24, 0x27, 0x20, 0x27, 0x24, 0x24, 0x24,
+  0x24, 0x24, 0x24, 0x24, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0x00,
+  0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x24, 0x24, 0x24, 0x24,
+  0x24, 0x24, 0xe7, 0x00, 0xe7, 0x24, 0x24, 0x24, 0x24, 0x24, 0x24, 0x24,
+  0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0xff, 0x00, 0xff, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x24, 0x24, 0x24, 0x24, 0x24, 0x24, 0x24, 0x24,
+  0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0xff, 0x00, 0xff, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0x24, 0x24, 0x24,
+  0x24, 0x24, 0x24, 0x24, 0x24, 0x24, 0x24, 0x24, 0x24, 0x24, 0x24, 0x24,
+  0x3f, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x08, 0x08, 0x08, 0x08,
+  0x08, 0x08, 0x0f, 0x08, 0x0f, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0f, 0x08, 0x0f, 0x08, 0x08, 0x08,
+  0x08, 0x08, 0x08, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x3f, 0x24, 0x24, 0x24, 0x24, 0x24, 0x24, 0x24, 0x24, 0x24, 0x24, 0x24,
+  0x24, 0x24, 0x24, 0x24, 0xff, 0x24, 0x24, 0x24, 0x24, 0x24, 0x24, 0x24,
+  0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0xff, 0x08, 0xff, 0x08, 0x08, 0x08,
+  0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08,
+  0xf8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x0f, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08,
+  0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+  0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf0, 0xf0, 0xf0, 0xf0,
+  0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0, 0xf0,
+  0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f,
+  0x0f, 0x0f, 0x0f, 0x0f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x32, 0x4a, 0x4a, 0x44, 0x44, 0x44, 0x44, 0x4a, 0x32, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x38, 0x44, 0x44, 0x48, 0x44, 0x42, 0x42,
+  0x42, 0x4c, 0x40, 0x40, 0x00, 0x7e, 0x42, 0x42, 0x40, 0x40, 0x40, 0x40,
+  0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x7f, 0x22, 0x22, 0x22, 0x22, 0x22, 0x22, 0x22, 0x22, 0x00, 0x00,
+  0x00, 0x7f, 0x40, 0x40, 0x20, 0x10, 0x08, 0x04, 0x08, 0x10, 0x20, 0x40,
+  0x40, 0x7f, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x3f, 0x48, 0x44,
+  0x44, 0x44, 0x44, 0x44, 0x44, 0x38, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x42, 0x42, 0x42, 0x42, 0x42, 0x42, 0x42, 0x62, 0x5d, 0x40, 0x40,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x31, 0x4e, 0x08, 0x08, 0x08, 0x08, 0x08,
+  0x08, 0x08, 0x00, 0x00, 0x00, 0x7f, 0x08, 0x08, 0x1c, 0x22, 0x41, 0x41,
+  0x41, 0x22, 0x1c, 0x08, 0x08, 0x7f, 0x00, 0x00, 0x00, 0x18, 0x24, 0x24,
+  0x42, 0x42, 0x42, 0x7e, 0x42, 0x42, 0x42, 0x24, 0x24, 0x18, 0x00, 0x00,
+  0x00, 0x00, 0x18, 0x24, 0x24, 0x42, 0x42, 0x42, 0x42, 0x42, 0x24, 0x24,
+  0x24, 0x66, 0x00, 0x00, 0x00, 0x0e, 0x11, 0x08, 0x04, 0x1c, 0x22, 0x42,
+  0x42, 0x42, 0x42, 0x42, 0x42, 0x3c, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x36, 0x49, 0x49, 0x49, 0x36, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x02, 0x02, 0x04, 0x3c, 0x4a, 0x4a, 0x52, 0x52, 0x3c, 0x20,
+  0x40, 0x40, 0x00, 0x00, 0x00, 0x0e, 0x10, 0x20, 0x20, 0x40, 0x40, 0x7c,
+  0x40, 0x40, 0x20, 0x20, 0x10, 0x0e, 0x00, 0x00, 0x00, 0x00, 0x00, 0x3c,
+  0x42, 0x42, 0x42, 0x42, 0x42, 0x42, 0x42, 0x42, 0x42, 0x42, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x7e, 0x00, 0x00, 0x7e, 0x00, 0x00, 0x7e,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x08, 0x08, 0x08, 0x08, 0x3e,
+  0x08, 0x08, 0x08, 0x08, 0x00, 0x3e, 0x00, 0x00, 0x00, 0x00, 0x00, 0x20,
+  0x10, 0x08, 0x04, 0x02, 0x04, 0x08, 0x10, 0x20, 0x00, 0x7e, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x04, 0x08, 0x10, 0x20, 0x40, 0x20, 0x10, 0x08, 0x04,
+  0x00, 0x7e, 0x00, 0x00, 0x00, 0x06, 0x09, 0x09, 0x09, 0x08, 0x08, 0x08,
+  0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08,
+  0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x48, 0x48, 0x48, 0x30, 0x00,
+  0x00, 0x00, 0x00, 0x18, 0x18, 0x00, 0x00, 0x7e, 0x00, 0x00, 0x18, 0x18,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x32, 0x4c, 0x00,
+  0x32, 0x4c, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x30, 0x48, 0x48,
+  0x48, 0x30, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x18, 0x18, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x08, 0x08,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0f, 0x08, 0x08,
+  0x08, 0x08, 0x08, 0x08, 0x28, 0x68, 0x28, 0x18, 0x18, 0x08, 0x00, 0x00,
+  0x00, 0x58, 0x64, 0x44, 0x44, 0x44, 0x44, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x18, 0x24, 0x04, 0x18, 0x20, 0x3c, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x3e, 0x3e, 0x3e, 0x3e, 0x3e, 0x3e, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00
+};
+unsigned int FM_T_437_F16_len = 4096;

kernel/fs/kvfs/kvfs.c

@@ -1,107 +0,0 @@
-#include <stdbool.h>
-#include <stdint.h>
-#include <stddef.h>
-#include "spinlock/spinlock.h"
-#include "errors.h"
-#include "hal/hal.h"
-#include "hshtb.h"
-#include "kprintf.h"
-#include "vfs/vfs.h"
-#include "dlmalloc/malloc.h"
-#include "util/util.h"
-
-int32_t kvfs_read(struct VfsMountPoint *vmp, const char *key, uint8_t *const buffer, size_t n, size_t off) {
-  KvfsNode *node = NULL;
-
-  spinlock_acquire(&vmp->spinlock);
-  HSHTB_GET(&vmp->fs.kvfs, nodes, (char *)key, key_, node);
-  spinlock_release(&vmp->spinlock);
-
-  if (node == NULL) {
-    return E_NOENTRY;
-  }
-
-  spinlock_acquire(&node->spinlock);
-  vmp->backingsd->read(vmp->backingsd, buffer, n, off);
-  spinlock_release(&node->spinlock);
-  return E_OK;
-}
-
-int32_t kvfs_write(struct VfsMountPoint *vmp, const char *key, const uint8_t *const buffer, size_t n, size_t off) {
-  KvfsNode *node = NULL;
-
-  spinlock_acquire(&vmp->spinlock);
-  HSHTB_GET(&vmp->fs.kvfs, nodes, (char *)key, key_, node);
-  spinlock_release(&vmp->spinlock);
-  if (node == NULL) {
-    return E_NOENTRY;
-  }
-
-  spinlock_acquire(&node->spinlock);
-  vmp->backingsd->write(vmp->backingsd, buffer, n, off);
-  spinlock_release(&node->spinlock);
-  return E_OK;
-}
-
-int32_t kvfs_remove(struct VfsMountPoint *vmp, const char *key) {
-  KvfsNode *node = NULL;
-
-  spinlock_acquire(&vmp->spinlock);
-  HSHTB_GET(&vmp->fs.kvfs, nodes, (char *)key, key_, node);
-  spinlock_release(&vmp->spinlock);
-
-  if (node == NULL) {
-    return E_NOENTRY;
-  }
-
-  spinlock_acquire(&node->spinlock);
-  hal_memset(node, 0, sizeof(*node));
-  spinlock_release(&node->spinlock);
-  return E_OK;
-}
-
-int32_t kvfs_cleanup(struct VfsMountPoint *vmp) {
-  int32_t err = vmp->backingsd->cleanup(vmp->backingsd);
-  if (err != E_OK) {
-    return err;
-  }
-  return E_OK;
-}
-
-int32_t kvfs_create(struct VfsMountPoint *vmp, const char *path, int32_t type) {
-  (void)type;
-  KvfsNode *node = NULL;
-
-  spinlock_acquire(&vmp->spinlock);
-  HSHTB_ALLOC(&vmp->fs.kvfs, nodes, (char *)path, key_, node);
-  spinlock_release(&vmp->spinlock);
-
-  if (node == NULL) {
-    return E_NOMEMORY;
-  }
-  return E_OK;
-}
-
-bool kvfs_check(void) {
-  int32_t ret;
-
-  ret = vfs_create("tmpvars", "hello", VFS_CREATE_FILE);
-  if (ret != E_OK) return false;
-
-  char *hello = "WAWAWAWA!!!";
-  ret = vfs_write("tmpvars", "hello", hello, hal_strlen(hello)+1, 0);
-  if (ret != E_OK) return false;
-
-  char buf[20];
-  ret = vfs_read("tmpvars", "hello", buf, sizeof(buf), 0);
-  if (ret != E_OK) return false;
-
-  vfs_remove("tmpvars", "hello");
-  if (ret != E_OK) return false;
-  
-  ret = vfs_read("tmpvars", "hello", buf, sizeof(buf), 0);
-  if (ret != E_NOENTRY) return false;
-
-  return true;
-}
-

kernel/fs/kvfs/kvfs.h

@@ -1,30 +0,0 @@
-#ifndef FS_KVFS_KVFS_H_
-#define FS_KVFS_KVFS_H_
-
-#include <stdint.h>
-#include <stdbool.h>
-
-struct VfsMountPoint;
-
-#define KVFS_NODE_KEY_MAX 128
-#define KVFS_NODES_MAX 256
-#define KVFS_BUFFER_SIZE (1024 * 2)
-
-typedef struct {
-  bool taken;
-  uint8_t key_[KVFS_NODE_KEY_MAX];
-  SpinLock spinlock;
-} KvfsNode;
-
-typedef struct {
-  KvfsNode nodes[KVFS_NODES_MAX];
-} Kvfs;
-
-int32_t kvfs_read(struct VfsMountPoint *vmp, const char *key, uint8_t *const buffer, size_t n, size_t off);
-int32_t kvfs_write(struct VfsMountPoint *vmp, const char *key, const uint8_t *const buffer, size_t n, size_t off);
-int32_t kvfs_remove(struct VfsMountPoint *vmp, const char *key);
-int32_t kvfs_create(struct VfsMountPoint *vmp, const char *path, int32_t type);
-int32_t kvfs_cleanup(struct VfsMountPoint *vmp);
-bool kvfs_check(void);
-
-#endif // FS_KVFS_KVFS_H_

kernel/fs/portlfs/portlfs.c

@@ -5,96 +5,216 @@
 #include "errors.h"
 #include "kprintf.h"
 #include "dlmalloc/malloc.h"
-
-#define CHECK(err) \
-  do { \
-    int ok = (err); \
-    kprintf("ok = %d\n", ok); \
-    if (ok < 0) goto bad; \
-  } while(0)
-
-int32_t littlefs_read(struct VfsMountPoint *vmp, const char *path, uint8_t *const buffer, size_t n, size_t off) {
-  spinlock_acquire(&vmp->spinlock);
-
-  LittleFs *fs = &vmp->fs.littlefs;
-  lfs_file_t file;
-  CHECK(lfs_file_open(&fs->instance, &file, path, LFS_O_RDONLY));
-  CHECK(lfs_file_seek(&fs->instance, &file, off, LFS_SEEK_SET));
-  CHECK(lfs_file_read(&fs->instance, &file, buffer + off, n));
-  CHECK(lfs_file_close(&fs->instance, &file));
-
-  spinlock_release(&vmp->spinlock);
-  return E_OK;
-bad:
-  spinlock_release(&vmp->spinlock);
-  return E_GENERIC_ERROR;
-}
-
-int32_t littlefs_write(struct VfsMountPoint *vmp, const char *path, const uint8_t *const buffer, size_t n, size_t off) {
-  spinlock_acquire(&vmp->spinlock);
-
-  LittleFs *fs = &vmp->fs.littlefs;
-  lfs_file_t file;
-  CHECK(lfs_file_open(&fs->instance, &file, path, LFS_O_WRONLY));
-  CHECK(lfs_file_seek(&fs->instance, &file, off, LFS_SEEK_SET));
-  CHECK(lfs_file_write(&fs->instance, &file, buffer, n));
-  CHECK(lfs_file_close(&fs->instance, &file));
-  
-  spinlock_release(&vmp->spinlock);
-  return E_OK;
-bad:
-  spinlock_release(&vmp->spinlock);
-  return E_GENERIC_ERROR;
-}
-
-int32_t littlefs_remove(struct VfsMountPoint *vmp, const char *path) {
-  spinlock_acquire(&vmp->spinlock);
-
-  LittleFs *fs = &vmp->fs.littlefs;
-  CHECK(lfs_remove(&fs->instance, path));
-  
-  spinlock_release(&vmp->spinlock);
-  return E_OK;
-bad:
-  spinlock_release(&vmp->spinlock);
-  return E_GENERIC_ERROR;
-}
+#include "hal/hal.h"
 
 int32_t littlefs_cleanup(struct VfsMountPoint *vmp) {
-  dlfree(vmp->fs.littlefs.instance.cfg);
+  dlfree((void *)vmp->fs.littlefs.instance.cfg);
   int32_t err = vmp->backingsd->cleanup(vmp->backingsd);
   if (err != E_OK) {
     return err;
   }
   err = lfs_unmount(&vmp->fs.littlefs.instance);
-  if (err < 0) { return E_GENERIC_ERROR; }
+  if (err < 0) { return E_BADIO; }
   return E_OK;
 }
 
-int32_t littlefs_create(struct VfsMountPoint *vmp, const char *path, int32_t type) {
+void littlefs_vobj_cleanup(struct VfsObj *vobj) {
+  if (vobj->extra != NULL) {
+    lfs_file_close(&vobj->vmp->fs.littlefs.instance, (lfs_file_t *)vobj->extra);
+    dlfree(vobj->extra);
+  }
+  dlfree(vobj);
+}
+
+int32_t littlefs_vobj_read(struct VfsObj *vobj, uint8_t *const buffer, size_t n, size_t off) {
+  if (!(vobj->flags & VFS_FLAG_READ)) {
+    return E_INVALIDOPER;
+  }
+
+  spinlock_acquire(&vobj->spinlock);
+  
+  int ok = lfs_file_seek(&vobj->vmp->fs.littlefs.instance, (lfs_file_t *)vobj->extra, off, LFS_SEEK_SET);
+  if (ok < 0) {
+    spinlock_release(&vobj->spinlock);
+    return E_BADIO;
+  }
+
+  ok = lfs_file_read(&vobj->vmp->fs.littlefs.instance, (lfs_file_t *)vobj->extra, buffer, n);
+  if (ok < 0) {
+    spinlock_release(&vobj->spinlock);
+    return E_BADIO;
+  }
+
+  spinlock_release(&vobj->spinlock);
+  return E_OK;
+}
+
+int32_t littlefs_vobj_write(struct VfsObj *vobj, const uint8_t *const buffer, size_t n, size_t off) {
+  if (!(vobj->flags & VFS_FLAG_WRITE)) {
+    return E_INVALIDOPER;
+  }
+
+  spinlock_acquire(&vobj->spinlock);
+
+  int ok = lfs_file_seek(&vobj->vmp->fs.littlefs.instance, (lfs_file_t *)vobj->extra, off, LFS_SEEK_SET);
+  if (ok < 0) {
+    spinlock_release(&vobj->spinlock);
+    return E_BADIO;
+  }
+
+  ok = lfs_file_write(&vobj->vmp->fs.littlefs.instance, (lfs_file_t *)vobj->extra, buffer, n);
+  if (ok < 0) {
+    spinlock_release(&vobj->spinlock);
+    return E_BADIO;
+  }
+
+  spinlock_release(&vobj->spinlock);
+  return E_OK;
+}
+
+int32_t littlefs_stat(struct VfsMountPoint *vmp, const char *path, IoctlStat *statbuf) {
+  struct lfs_info info;
+
   spinlock_acquire(&vmp->spinlock);
 
-  LittleFs *fs = &vmp->fs.littlefs;
-  switch (type) {
-    case VFS_CREATE_DIR:
-      CHECK(lfs_mkdir(&fs->instance, path));
-      break;
-    case VFS_CREATE_FILE: {
-      lfs_file_t file;
-      CHECK(lfs_file_open(&fs->instance, &file, path, LFS_O_CREAT | LFS_O_WRONLY));
-      CHECK(lfs_file_close(&fs->instance, &file));
-    } break;
+  int ok = lfs_stat(&vmp->fs.littlefs.instance, path, &info);
+  if (ok < 0) {
+    spinlock_release(&vmp->spinlock);
+    return E_BADIO;
+  }
+
+  if (info.type == LFS_TYPE_REG) {
+    statbuf->type = IOCTLSTAT_FILE;
+    statbuf->size = info.size;
+  } else if (info.type == LFS_TYPE_DIR) {
+    statbuf->type = IOCTLSTAT_DIR;
+    statbuf->size = 0;
+    // TODO: find a better way than this... !!!
+    lfs_dir_t dir;
+    ok = lfs_dir_open(&vmp->fs.littlefs.instance, &dir, path);
+    if (ok < 0) {
+      spinlock_release(&vmp->spinlock);
+      return E_BADIO;
+    }
+    struct lfs_info info2;
+    while (lfs_dir_read(&vmp->fs.littlefs.instance, &dir, &info2) > 0) {
+      statbuf->size++;
+    }
+    lfs_dir_close(&vmp->fs.littlefs.instance, &dir);
   }
   
   spinlock_release(&vmp->spinlock);
   return E_OK;
-bad:
-  spinlock_release(&vmp->spinlock);
-  return E_GENERIC_ERROR;
 }
 
-bool littlefs_check(void) {
-  return true;
+int32_t littlefs_mkdir(struct VfsMountPoint *vmp, const char *path) {
+  spinlock_acquire(&vmp->spinlock);
+  int ok = lfs_mkdir(&vmp->fs.littlefs.instance, path);
+  spinlock_release(&vmp->spinlock);
+  if (ok < 0) {
+    return E_BADIO;
+  }
+  return E_OK;
+}
+
+struct VfsObj *littlefs_open(struct VfsMountPoint *vmp, const char *path, uint32_t flags) {
+  VfsObj *vobj = dlmalloc(sizeof(*vobj));
+  if (vobj == NULL) {
+    return NULL;
+  }
+  hal_memset(vobj, 0, sizeof(*vobj));
+  spinlock_init(&vobj->spinlock);
+
+  int lfs_flags = 0;
+  lfs_file_t *file = dlmalloc(sizeof(*file));
+  if (file == NULL) {
+    dlfree(vobj);
+    return NULL;
+  }
+
+  spinlock_acquire(&vmp->spinlock);
+
+  LittleFs *fs = &vmp->fs.littlefs;
+  
+  if (flags & VFS_FLAG_MAKE) {
+    lfs_flags |= LFS_O_CREAT;
+  }
+
+  if (flags == VFS_FLAG_READ) {
+    lfs_flags |= LFS_O_RDONLY;
+  } else if (flags == VFS_FLAG_WRITE) {
+    lfs_flags |= LFS_O_WRONLY;
+  } else if ((flags & VFS_FLAG_READ) && (flags & VFS_FLAG_WRITE)) {
+    lfs_flags |= LFS_O_RDWR;
+  }
+
+  int ok = lfs_file_open(&fs->instance, file, path, lfs_flags);
+
+  if (ok < 0) {
+    dlfree(vobj);
+    dlfree(file);
+    spinlock_release(&vmp->spinlock);
+    return NULL;
+  }
+
+  vobj->flags = flags;
+  vobj->extra = file;
+  vobj->extrasize = sizeof(*file);
+  vobj->vmp = vmp;
+  vobj->cleanup = &littlefs_vobj_cleanup;
+  vobj->read = &littlefs_vobj_read;
+  vobj->write = &littlefs_vobj_write;
+  hal_strcpy(vobj->path, path);
+
+  spinlock_release(&vmp->spinlock);
+  return vobj;
+}
+
+int32_t littlefs_fetchdirent(struct VfsMountPoint *vmp, const char *path, IoctlDirent *direntbuf, size_t idx) {
+  size_t i = 0;
+  struct lfs_info statinfo;
+  int ok;
+
+  spinlock_acquire(&vmp->spinlock);
+  
+  ok = lfs_stat(&vmp->fs.littlefs.instance, path, &statinfo);
+  if (ok < 0) {
+    spinlock_release(&vmp->spinlock);
+    return E_BADIO;
+  }
+
+  if (statinfo.type != LFS_TYPE_DIR) {
+    spinlock_release(&vmp->spinlock);
+    return E_BADIO;
+  }
+
+  lfs_dir_t dir;
+  ok = lfs_dir_open(&vmp->fs.littlefs.instance, &dir, path);
+  if (ok < 0) { 
+    spinlock_release(&vmp->spinlock);
+    return E_BADIO;
+  }
+
+  struct lfs_info entinfo;
+  while (lfs_dir_read(&vmp->fs.littlefs.instance, &dir, &entinfo) > 0) {
+    if (i == idx) {
+      if (entinfo.type == LFS_TYPE_REG) {
+        direntbuf->stat.type = IOCTLSTAT_FILE;
+        direntbuf->stat.size = entinfo.size;
+      } else if (entinfo.type == LFS_TYPE_DIR) {
+        direntbuf->stat.type = IOCTLSTAT_DIR;
+      }
+
+      hal_memcpy(direntbuf->name, entinfo.name, sizeof(direntbuf->name));
+      break;
+    }
+    i++;
+  }
+  
+  lfs_dir_close(&vmp->fs.littlefs.instance, &dir);
+
+  spinlock_release(&vmp->spinlock);
+  return E_OK;
 }
 
 int portlfs_read(const struct lfs_config *c, lfs_block_t block, lfs_off_t off, void *buffer, lfs_size_t size) {
@@ -119,3 +239,4 @@ int portlfs_sync(const struct lfs_config *c) {
   (void)c;
   return 0;
 }
+

kernel/fs/portlfs/portlfs.h

@@ -4,21 +4,22 @@
 #include <stdint.h>
 #include <stdbool.h>
 #include "fs/littlefs/lfs.h"
+#include "sysdefs/ioctl.h"
 
 #define LITTLEFS_BLOCK_SIZE 4096
 
 struct VfsMountPoint;
+struct VfsObj;
 
 typedef struct {
   lfs_t instance;
 } LittleFs;
 
-int32_t littlefs_read(struct VfsMountPoint *vmp, const char *path, uint8_t *const buffer, size_t n, size_t off);
-int32_t littlefs_write(struct VfsMountPoint *vmp, const char *path, const uint8_t *const buffer, size_t n, size_t off);
-int32_t littlefs_remove(struct VfsMountPoint *vmp, const char *path);
-int32_t littlefs_create(struct VfsMountPoint *vmp, const char *path, int32_t type);
 int32_t littlefs_cleanup(struct VfsMountPoint *vmp);
-bool littlefs_check(void);
+struct VfsObj *littlefs_open(struct VfsMountPoint *vmp, const char *path, uint32_t flags);
+int32_t littlefs_stat(struct VfsMountPoint *vmp, const char *path, IoctlStat *statbuf);
+int32_t littlefs_fetchdirent(struct VfsMountPoint *vmp, const char *path, IoctlDirent *direntbuf, size_t idx);
+int32_t littlefs_mkdir(struct VfsMountPoint *vmp, const char *path);
 
 int portlfs_read(const struct lfs_config *c, lfs_block_t block, lfs_off_t off, void *buffer, lfs_size_t size);
 int portlfs_prog(const struct lfs_config *c, lfs_block_t block, lfs_off_t off, const void *buffer, lfs_size_t size);

kernel/hal/hal.h

@@ -18,9 +18,14 @@ size_t hal_strcspn(const char *s, const char *reject);
 size_t hal_strspn(const char *s, const char *accept);
 char *hal_strcpy(char *dest, const char *src);
 char *hal_strchr(const char *s, int c);
+void hal_wait(uint32_t ms);
 
-#if defined(__x86_64__)
-# define HAL_PAGE_SIZE 0x1000
-#endif
+#define HAL_PAGE_SIZE 0x1000
+#include "x86_64/vmm.h"
+#include "x86_64/switch.h"
+#include "x86_64/paging.h"
+#include "x86_64/intr.h"
+#include "x86_64/io.h"
+#include "x86_64/gdt.h"
 
 #endif // KERNEL_HAL_HAL_H_

kernel/hal/x86_64/gdt.c

@@ -2,8 +2,13 @@
 #include <stddef.h>
 #include "compiler/attr.h"
 #include "hal/hal.h"
+#include "gdt.h"
 
-#define GDT_SIZE 5
+#define GDT_PRESENT 0x80
+#define GDT_TSS     0x89
+
+#define KSTACK (1024*2*4096)
+ALIGNED(16) static uint8_t kernelstack[KSTACK];
 
 typedef struct {
   uint16_t limitlow;
@@ -25,70 +30,63 @@ typedef struct {
   GdtEntry tsshigh;
 } PACKED ExtendedGdt;
 
-typedef struct {
-  uint32_t resv0;
-  uint64_t rsp0;
-  uint64_t rsp1;
-  uint64_t rsp2;
-  uint64_t resv1;
-  uint64_t ist[7];
-  uint64_t resv2;
-  uint16_t resv3;
-  uint16_t iopb_off;
-} PACKED Tss;
+ALIGNED(16) Tss tss = {0};
+ALIGNED(16) static ExtendedGdt gdt = {0};
 
-static Tss tss = {0};
-static ExtendedGdt *curgdt = NULL;
-
-#define KCODE 0x08
-#define KDATA 0x10
-#define UCODE 0x18
-#define UDATA 0x20
-#define TSS   0x28
-
-#define GDT_PRESENT 0x80
-#define GDT_TSS     0x89
-
-static uint64_t gdt_curretbase(void) {
-  GdtPtr gdtr;
-  asm volatile("sgdt %0" : "=m"(gdtr));
-  return gdtr.base;
-}
-
-void gdt_setentry(GdtEntry *entry, uint32_t base, uint32_t limit, uint8_t access, uint8_t gran) {
-  entry->baselow = base & 0xffff;
-  entry->basemid = (base >> 16) & 0xff;
-  entry->basehigh = (base >> 24) & 0xff;
-  entry->limitlow = limit & 0xffff;
-  entry->gran = ((limit >> 16) & 0x0f) | (gran & 0xf0);
-  entry->access = access;
+void gdt_setentry(GdtEntry *ent, uint32_t base, uint32_t limit, uint8_t acc, uint8_t gran) {
+  ent->baselow = base & 0xffff;
+  ent->basemid = (base >> 16) & 0xff;
+  ent->basehigh = (base >> 24) & 0xff;
+  ent->limitlow = limit & 0xffff;
+  ent->gran = ((limit >> 16) & 0x0f) | (gran & 0xf0);
+  ent->access = acc;
 }
 
 void gdt_init(void) {
-  uint64_t base = gdt_curretbase();
-  curgdt = (ExtendedGdt *)base;
-
   hal_memset(&tss, 0, sizeof(tss));
   tss.iopb_off = sizeof(tss);
 
+  tss.rsp0 = (uint64_t)(kernelstack + sizeof(kernelstack));
+
   uint64_t tss_base = (uint64_t)&tss;
   uint32_t tss_limit = sizeof(tss) - 1;
 
-  gdt_setentry(&curgdt->tsslow, tss_base & 0xFFFFFFFF, tss_limit, GDT_PRESENT | GDT_TSS, 0x0);
+  gdt_setentry(&gdt.old[0], 0, 0, 0, 0);
+  gdt_setentry(&gdt.old[1], 0, 0xFFFFF, 0x9a, 0xA0);
+  gdt_setentry(&gdt.old[2], 0, 0xFFFFF, 0x92, 0xC0);
+  gdt_setentry(&gdt.old[3], 0, 0xFFFFF, 0xfa, 0xA0);
+  gdt_setentry(&gdt.old[4], 0, 0xFFFFF, 0xf2, 0xC0);
 
-  GdtEntry *tsshigh = &curgdt->tsshigh;
-  tsshigh->baselow = (tss_base >> 32) & 0xffff;
-  tsshigh->basemid = (tss_base >> 48) & 0xff;
-  tsshigh->basehigh = (tss_base >> 56) & 0xff;
-  tsshigh->access = 0;
-  tsshigh->gran = 0;
-  tsshigh->limitlow = 0;
+  gdt_setentry(&gdt.tsslow, tss_base & 0xFFFFFFFF, tss_limit, GDT_PRESENT | GDT_TSS, 0x0);
+
+  uint32_t tssbasehi = tss_base >> 32;
+  gdt.tsshigh.limitlow = tssbasehi & 0xffff;
+  gdt.tsshigh.baselow = (tssbasehi >> 16) & 0xffff;
+  gdt.tsshigh.basemid = 0;
+  gdt.tsshigh.basehigh = 0;
+  gdt.tsshigh.access = 0;
+  gdt.tsshigh.gran = 0;
 
   GdtPtr gdtr;
-  asm volatile("sgdt %0" : "=m"(gdtr));
-  gdtr.limit = sizeof(ExtendedGdt) - 1;
+  gdtr.limit = sizeof(gdt) - 1;
+  gdtr.base = (uint64_t)&gdt;
   asm volatile("lgdt %0" :: "m"(gdtr));
 
-  asm volatile("ltr %0" :: "r"((uint16_t)0x28));
+  asm volatile(
+    "pushq %[kcode]\n"
+    "lea 1f(%%rip), %%rax\n"
+    "pushq %%rax\n"
+    "lretq\n"
+    "1:\n"
+    "movw %[kdata], %%ax\n"
+    "movw %%ax, %%ds\n"
+    "movw %%ax, %%es\n"
+    "movw %%ax, %%ss\n"
+    :
+    : [kcode] "i"(KCODE), [kdata] "i"(KDATA)
+    : "rax", "memory"
+  );
+
+  asm volatile("ltr %0" :: "r"((uint16_t)TSS));
 }
 

kernel/hal/x86_64/gdt.h

@@ -1,6 +1,26 @@
 #ifndef HAL_GDT_H_
 #define HAL_GDT_H_
 
+#define KCODE 0x08
+#define KDATA 0x10
+#define UCODE 0x18
+#define UDATA 0x20
+#define TSS   0x28
+
+typedef struct {
+  uint32_t resv0;
+  uint64_t rsp0;
+  uint64_t rsp1;
+  uint64_t rsp2;
+  uint64_t resv1;
+  uint64_t ist[7];
+  uint64_t resv2;
+  uint16_t resv3;
+  uint16_t iopb_off;
+} PACKED Tss;
+
+ALIGNED(16) extern Tss tss;
+
 void gdt_init(void);
 
 #endif // HAL_GDT_H_

kernel/hal/x86_64/hal.c

@@ -2,17 +2,17 @@
 #include <stdbool.h>
 #include "hal/hal.h"
 #include "kprintf.h"
-#include "serial.h"
 #include "gdt.h"
-#include "idt.h"
+#include "intr.h"
+#include "pic.h"
+#include "pit.h"
 
 void hal_init(void) {
-  if (!serial_init()) {
-    hal_hang(); // going further makes no sense
-  }
-  LOG("hal", "serial init\n");
   gdt_init();
-  idt_init();
+  intr_init();
+  pic_init();
+  pit_init();
+  hal_intr_disable();
 }
 
 __attribute__((noreturn)) void hal_hang(void) {
@@ -21,3 +21,7 @@ __attribute__((noreturn)) void hal_hang(void) {
   }
 }
 
+void hal_wait(uint32_t ms) {
+  pit_wait(ms);
+}
+

kernel/hal/x86_64/idt.c

@@ -1,25 +0,0 @@
-#include <stdint.h>
-#include "idt.h"
-#include "kprintf.h"
-
-#define ENTRIES 256
-static IdtGate idtgates[ENTRIES] = {0};
-static Idt idt;
-
-void idt_setgate(int i, uint64_t handler, uint8_t flags) {
-  idtgates[i].isrlow = (uint16_t)handler;
-  idtgates[i].kernelcs = 40;
-  idtgates[i].ist = 0;
-  idtgates[i].resv = 0;
-  idtgates[i].attrs = flags;
-  idtgates[i].isrmid = (uint16_t)(handler >> 16);
-  idtgates[i].isrhigh = (uint16_t)(handler >> 32);
-}
-
-void idt_init(void) {
-  idt.base = (uint64_t)&idtgates;
-  idt.limit = ENTRIES * sizeof(IdtGate) - 1;
-  asm volatile("lidt %0" :: "m"(idt) : "memory");
-
-  LOG("idt", "idt init\n");
-}

kernel/hal/x86_64/idt.h

@@ -1,24 +0,0 @@
-#ifndef HAL_IDT_H_
-#define HAL_IDT_H_
-
-#include <stdint.h>
-#include "compiler/attr.h"
-
-typedef struct {
-  uint16_t isrlow;
-  uint16_t kernelcs;
-  uint8_t ist;
-  uint8_t attrs;
-  uint16_t isrmid;
-  uint32_t isrhigh;
-  uint32_t resv;
-} PACKED IdtGate;
-
-typedef struct {
-  uint16_t limit;
-  uint64_t base;
-} PACKED Idt;
-
-void idt_init(void);
-
-#endif // HAL_IDT_H_

kernel/hal/x86_64/intr.S

@@ -1,9 +0,0 @@
-.global hal_intr_enable
-hal_intr_enable:
-  sti
-  ret
-
-.global hal_intr_disable
-hal_intr_disable:
-  cli
-  ret

kernel/hal/x86_64/intr.c

@@ -0,0 +1,243 @@
+#include <stddef.h>
+#include <stdint.h>
+#include <stdbool.h>
+#include "intr.h"
+#include "io.h"
+#include "gdt.h"
+#include "hal/hal.h"
+#include "kprintf.h"
+#include "compiler/attr.h"
+#include "pic.h"
+#include "pit.h"
+#include "proc/proc.h"
+#include "syscall/syscall.h"
+#include "errors.h"
+#include "ipc/pipe/pipe.h"
+#include "rbuf/rbuf.h"
+#include "dlmalloc/malloc.h"
+#include "util/util.h"
+
+typedef struct IntrHandler {
+  struct IntrHandler *next;
+  void (*fn)(void);
+  int irq;
+} IntrHandler;
+
+IntrHandler *INTR_HANDLERS = NULL;
+
+void intr_attchhandler(void (*fn)(void), int irq) {
+  IntrHandler *ih = dlmalloc(sizeof(*ih));
+  ih->fn = fn;
+  ih->irq = irq;
+  LL_APPEND(INTR_HANDLERS, ih);
+}
+
+typedef struct BackTraceFrame {
+  struct BackTraceFrame *rbp;
+  uint64_t rip;
+} BackTraceFrame;
+
+void backtrace(BackTraceFrame *bt) {
+  kprintf("Backtrace:\n");
+  for (size_t frame = 0; bt; frame++) {
+    kprintf("  %zu: 0x%lx\n", frame, bt->rip);
+    bt = bt->rbp;
+  }
+}
+
+void hal_intr_disable(void) {
+  asm volatile("cli");
+}
+
+void hal_intr_enable(void) {
+  asm volatile("sti");
+}
+
+typedef struct {
+  uint16_t intrlow;
+  uint16_t kernelcs;
+  uint8_t ist;
+  uint8_t attrs;
+  uint16_t intrmid;
+  uint32_t intrhigh;
+  uint32_t resv;
+} PACKED IdtGate;
+
+typedef struct {
+  uint16_t limit;
+  uint64_t base;
+} PACKED Idt;
+
+#define ENTRIES 256
+ALIGNED(0x10) static IdtGate idtgates[ENTRIES] = {0};
+static Idt idt = {0};
+
+void idt_setentry(int i, uint64_t handler, uint8_t flags) {
+  idtgates[i].intrlow = handler & 0xffff;
+  idtgates[i].kernelcs = KCODE;
+  idtgates[i].ist = 0;
+  idtgates[i].attrs = flags;
+  idtgates[i].intrmid = (handler >> 16) & 0xFFFF;
+  idtgates[i].intrhigh = (handler >> 32) & 0xFFFFFFFF;
+  idtgates[i].resv = 0;
+}
+
+void idt_init(void) {
+  idt.base = (uint64_t)&idtgates;
+  idt.limit = ENTRIES * sizeof(IdtGate) - 1;
+  asm volatile("lidt %0" :: "m"(idt) : "memory");
+
+  LOG("hal", "idt init\n");
+}
+
+extern void *ISR_REDIRTABLE[];
+
+static const char *exceptions[] = {
+  "#DE", "#DB", "NMI",
+  "#BP", "#OF", "#BR",
+  "#UD", "#NM", "#DF",
+  "CSO", "#TS", "#NP",
+  "#SS", "#GP", "#PF",
+  "RES", "#MF", "#AC",
+  "#MC", "#XM", "#VE",
+  "#CP",
+};
+
+void intr_init(void) {
+  #define MKINTR(N) \
+    extern void intr_vec##N(void); \
+    idt_setentry(N, (uint64_t)&intr_vec##N, 0x8E);
+
+  MKINTR(0);
+  MKINTR(1);
+  MKINTR(2);
+  MKINTR(4);
+  MKINTR(5);
+  MKINTR(6);
+  MKINTR(7);
+  MKINTR(8);
+  MKINTR(9);
+  MKINTR(10);
+  MKINTR(11);
+  MKINTR(12);
+  MKINTR(13);
+  MKINTR(14);
+  MKINTR(15);
+  MKINTR(16);
+  MKINTR(17);
+  MKINTR(18);
+  MKINTR(19);
+  MKINTR(20);
+  MKINTR(21);
+  MKINTR(22);
+  MKINTR(23);
+  MKINTR(24);
+  MKINTR(25);
+  MKINTR(26);
+  MKINTR(27);
+  MKINTR(28);
+  MKINTR(29);
+  MKINTR(30);
+  MKINTR(31);
+  MKINTR(32);
+  MKINTR(33);
+  MKINTR(34);
+  MKINTR(35);
+  MKINTR(36);
+  MKINTR(37);
+  MKINTR(38);
+  MKINTR(39);
+  MKINTR(40);
+  MKINTR(41);
+  MKINTR(42);
+  MKINTR(43);
+  MKINTR(44);
+  MKINTR(45);
+  MKINTR(46);
+  MKINTR(47);
+    
+  extern void intr_vec128(void);
+  idt_setentry(0x80, (uint64_t)&intr_vec128, 0xEE);
+
+  idt_init();
+}
+
+void intr_dumpframe(IntrStackFrame *frame) {
+  uint64_t cr2;
+  asm volatile("mov %%cr2, %0" : "=r"(cr2));
+  uint64_t cr3;
+  asm volatile("mov %%cr3, %0" : "=r"(cr3));
+  uint64_t cr4;
+  asm volatile("mov %%cr4, %0" : "=r"(cr4));
+  kprintf("rax=%016lx rcx=%016lx rdx=%016lx\n"
+          "rsi=%016lx rdi=%016lx r8 =%016lx\n"
+          "r9 =%016lx r10=%016lx r11=%016lx\n"
+          "rip=%016lx rfl=%016lx rsp=%016lx\n"
+          "cs =%016lx ss =%016lx trp=%016lx\n"
+          "cr2=%016lx cr3=%016lx cr4=%016lx\n"
+          "\n\n",
+      frame->regs.rax, frame->regs.rcx, frame->regs.rdx,
+      frame->regs.rsi, frame->regs.rdi, frame->regs.r8,
+      frame->regs.r9,  frame->regs.r10, frame->regs.r11,
+      frame->rip,      frame->rflags,   frame->rsp,
+      frame->cs,       frame->ss,       frame->trapnum,
+      cr2,             cr3,             cr4
+    );
+}
+
+void hal_syscalldispatch(IntrStackFrame *frame) {
+  uint64_t sysnum = frame->regs.rax;
+  if (sysnum < SYSCALLS_MAX) {
+    SyscallFn fn = SYSCALL_TABLE[sysnum];
+    if (fn == NULL) {
+      frame->regs.rax = E_BADSYSCALL;
+      return;
+    }
+    int32_t ret = fn(frame, frame->regs.rdi, frame->regs.rsi, frame->regs.rdx,
+                            frame->regs.r10, frame->regs.r8,  frame->regs.r9);
+
+    if (ret == E_DOSCHEDULING) {
+      proc_sched((void *)frame);
+    }
+    frame->regs.rax = *(uint64_t *)&ret;
+  }
+}
+
+void intr_eoi() {
+  io_out8(PIC2_CMD, PIC_EOI);
+  io_out8(PIC1_CMD, PIC_EOI);
+}
+
+void intr_handleintr(IntrStackFrame *frame) {
+  if (frame->trapnum <= 31) {
+    kprintf("ERROR %s, 0x%lX\n", exceptions[frame->trapnum], frame->errnum);
+    intr_dumpframe(frame);
+    backtrace((BackTraceFrame *)frame->regs.rbp);
+    if (hal_vmm_current_cr3() != KERNEL_CR3) {
+      kprintf("killed pid %ld %s\n", PROCS.current->pid, PROCS.current->name);
+      proc_killself();
+      proc_sched((void *)frame);
+    }
+    hal_hang();
+  } else if (frame->trapnum >= 32 && frame->trapnum <= 47) {
+    switch (frame->trapnum) {
+      case INTR_IRQBASE+0:
+        PIT_TICKS++;
+        intr_eoi();
+        proc_sched((void *)frame);
+        break;
+      default:
+        IntrHandler *ih, *ihtmp;
+        LL_FOREACH_SAFE(INTR_HANDLERS, ih, ihtmp) {
+          if (ih->irq == frame->trapnum) {
+            ih->fn();
+          }
+        }
+        intr_eoi();
+        break;
+    }
+  } else if (frame->trapnum == 0x80) {
+    hal_syscalldispatch(frame);
+  }
+}
+

kernel/hal/x86_64/intr.h

@@ -0,0 +1,39 @@
+#ifndef HAL_INTR_H_
+#define HAL_INTR_H_
+
+#define INTR_IRQBASE 0x20
+
+#include "compiler/attr.h"
+
+typedef struct {
+  uint64_t r15;
+  uint64_t r14;
+  uint64_t r13;
+  uint64_t r12;
+  uint64_t r11;
+  uint64_t r10;
+  uint64_t r9;
+  uint64_t r8;
+  uint64_t rbp;
+  uint64_t rdi;
+  uint64_t rsi;
+  uint64_t rdx;
+  uint64_t rcx;
+  uint64_t rax;
+} PACKED SavedRegs;
+
+typedef struct {
+  SavedRegs regs;
+  uint64_t trapnum;
+  uint64_t errnum;
+  uint64_t rip;
+  uint64_t cs;
+  uint64_t rflags;
+  uint64_t rsp;
+  uint64_t ss;
+} PACKED IntrStackFrame;
+
+void intr_attchhandler(void (*fn)(void), int irq);
+void intr_init(void);
+
+#endif // HAL_INTR_H_

kernel/hal/x86_64/intr0.S

@@ -0,0 +1,221 @@
+#include "regs.S"
+
+.extern intr_handleintr
+
+.global intr_vec0
+.global intr_vec1
+.global intr_vec2
+.global intr_vec3
+.global intr_vec4
+.global intr_vec5
+.global intr_vec6
+.global intr_vec7
+.global intr_vec8
+.global intr_vec9
+.global intr_vec10
+.global intr_vec11
+.global intr_vec12
+.global intr_vec13
+.global intr_vec14
+.global intr_vec15
+.global intr_vec16
+.global intr_vec17
+.global intr_vec18
+.global intr_vec19
+.global intr_vec20
+.global intr_vec21
+.global intr_vec22
+.global intr_vec23
+.global intr_vec24
+.global intr_vec25
+.global intr_vec26
+.global intr_vec27
+.global intr_vec28
+.global intr_vec29
+.global intr_vec30
+.global intr_vec31
+.global intr_vec32
+.global intr_vec33
+.global intr_vec34
+.global intr_vec35
+.global intr_vec36
+.global intr_vec37
+.global intr_vec38
+.global intr_vec39
+.global intr_vec40
+.global intr_vec41
+.global intr_vec42
+.global intr_vec43
+.global intr_vec44
+.global intr_vec45
+.global intr_vec46
+.global intr_vec47
+.global intr_vec128
+
+.macro _vecintr_errorcode_present_save num
+  pushq $\num
+.endm
+
+.macro _vecintr_plain_save num
+  pushq $0x0
+  pushq $\num
+.endm
+
+.macro _vecintr_bodygen
+  cli
+  _push_regs
+  cld
+  movq %rsp, %rdi
+  call intr_handleintr
+  _pop_regs
+  add $0x10, %rsp
+  iretq
+.endm
+
+intr_vec0:
+  _vecintr_plain_save 0
+  _vecintr_bodygen
+intr_vec1:
+  _vecintr_plain_save 1
+  _vecintr_bodygen
+intr_vec2:
+  _vecintr_plain_save 2
+  _vecintr_bodygen
+intr_vec3:
+  _vecintr_plain_save 3
+  _vecintr_bodygen
+intr_vec4:
+  _vecintr_plain_save 4
+  _vecintr_bodygen
+intr_vec5:
+  _vecintr_plain_save 5
+  _vecintr_bodygen
+intr_vec6:
+  _vecintr_plain_save 6
+  _vecintr_bodygen
+intr_vec7:
+  _vecintr_plain_save 7
+  _vecintr_bodygen
+intr_vec8:
+  _vecintr_errorcode_present_save 8
+  _vecintr_bodygen
+intr_vec9:
+  _vecintr_plain_save 9
+  _vecintr_bodygen
+intr_vec10:
+  _vecintr_errorcode_present_save 10
+  _vecintr_bodygen
+intr_vec11:
+  _vecintr_errorcode_present_save 11
+  _vecintr_bodygen
+intr_vec12:
+  _vecintr_errorcode_present_save 12
+  _vecintr_bodygen
+intr_vec13:
+  _vecintr_errorcode_present_save 13
+  _vecintr_bodygen
+intr_vec14:
+  _vecintr_errorcode_present_save 14
+  _vecintr_bodygen
+intr_vec15:
+  _vecintr_plain_save 15
+  _vecintr_bodygen
+intr_vec16:
+  _vecintr_plain_save 16
+  _vecintr_bodygen
+intr_vec17:
+  _vecintr_errorcode_present_save 17
+  _vecintr_bodygen
+intr_vec18:
+  _vecintr_plain_save 18
+  _vecintr_bodygen
+intr_vec19:
+  _vecintr_plain_save 19
+  _vecintr_bodygen
+intr_vec20:
+  _vecintr_plain_save 20
+  _vecintr_bodygen
+intr_vec21:
+  _vecintr_errorcode_present_save 21
+  _vecintr_bodygen
+intr_vec22: 
+  _vecintr_plain_save 22
+  _vecintr_bodygen
+intr_vec23: 
+  _vecintr_plain_save 23
+  _vecintr_bodygen
+intr_vec24: 
+  _vecintr_plain_save 24
+  _vecintr_bodygen
+intr_vec25: 
+  _vecintr_plain_save 25
+  _vecintr_bodygen
+intr_vec26: 
+  _vecintr_plain_save 26
+  _vecintr_bodygen
+intr_vec27: 
+  _vecintr_plain_save 27
+  _vecintr_bodygen
+intr_vec28: 
+  _vecintr_plain_save 28
+  _vecintr_bodygen
+intr_vec29:
+  _vecintr_errorcode_present_save 29
+  _vecintr_bodygen
+intr_vec30:
+  _vecintr_errorcode_present_save 30
+  _vecintr_bodygen
+intr_vec31: 
+  _vecintr_plain_save 31
+  _vecintr_bodygen
+intr_vec32: 
+  _vecintr_plain_save 32
+  _vecintr_bodygen
+intr_vec33: 
+  _vecintr_plain_save 33
+  _vecintr_bodygen
+intr_vec34: 
+  _vecintr_plain_save 34
+  _vecintr_bodygen
+intr_vec35: 
+  _vecintr_plain_save 35
+  _vecintr_bodygen
+intr_vec36: 
+  _vecintr_plain_save 36
+  _vecintr_bodygen
+intr_vec37: 
+  _vecintr_plain_save 37
+  _vecintr_bodygen
+intr_vec38: 
+  _vecintr_plain_save 38
+  _vecintr_bodygen
+intr_vec39: 
+  _vecintr_plain_save 39
+  _vecintr_bodygen
+intr_vec40: 
+  _vecintr_plain_save 40
+  _vecintr_bodygen
+intr_vec41: 
+  _vecintr_plain_save 41
+  _vecintr_bodygen
+intr_vec42: 
+  _vecintr_plain_save 42
+  _vecintr_bodygen
+intr_vec43: 
+  _vecintr_plain_save 43
+  _vecintr_bodygen
+intr_vec44: 
+  _vecintr_plain_save 44
+  _vecintr_bodygen
+intr_vec45: 
+  _vecintr_plain_save 45
+  _vecintr_bodygen
+intr_vec46: 
+  _vecintr_plain_save 46
+  _vecintr_bodygen
+intr_vec47: 
+  _vecintr_plain_save 47
+  _vecintr_bodygen
+intr_vec128: 
+  _vecintr_plain_save 128
+  _vecintr_bodygen

kernel/hal/x86_64/io.S

@@ -1,13 +0,0 @@
-.global io_outb
-io_outb:
-  mov %di, %dx
-  mov %sil, %al
-  out %al, %dx
-  ret
-
-.global io_inb
-io_inb:
-  mov %di, %dx
-  in %dx, %al
-  movzx %al, %rax
-  ret

kernel/hal/x86_64/io.c

@@ -0,0 +1,28 @@
+#include <stdint.h>
+
+uint8_t io_in8(uint16_t port) {
+  uint8_t r;
+  asm volatile("inb %1, %0" : "=a"(r) : "dN"(port));
+  return r;
+}
+void io_out8(uint16_t port, uint8_t value) {
+  asm volatile("outb %1, %0" :: "dN"(port), "a"(value));
+}
+
+uint16_t io_in16(uint16_t port) {
+  uint16_t r;
+  asm volatile("in %%dx, %%ax" : "=a"(r) : "d"(port));
+  return r;
+}
+void io_out16(uint16_t port, uint16_t value) {
+  asm volatile("out %%ax, %%dx" :: "a"(value), "d"(port));
+}
+
+uint32_t io_in32(uint16_t port) {
+  uint32_t r;
+  asm volatile("inl %%dx, %%eax" : "=a"(r) : "d"(port));
+  return r;
+}
+void io_out32(uint16_t port, uint32_t value) {
+  asm volatile("outl %%eax, %%dx" :: "d"(port), "a"(value));
+}

kernel/hal/x86_64/io.h

@@ -1,7 +1,15 @@
 #ifndef HAL_IO_H_
 #define HAL_IO_H_
 
-extern uint8_t io_inb(uint16_t port);
-extern void io_outb(uint16_t port, uint8_t value);
+#include <stdint.h>
+
+uint8_t io_in8(uint16_t port);
+void io_out8(uint16_t port, uint8_t value);
+
+uint16_t io_in16(uint16_t port);
+void io_out16(uint16_t port, uint16_t value);
+
+uint32_t io_in32(uint16_t port);
+void io_out32(uint16_t port, uint32_t value);
 
 #endif // HAL_IO_H_

kernel/hal/x86_64/paging.S

@@ -0,0 +1,4 @@
+.global hal_loadpd
+hal_loadpd:
+  mov %rdi, %cr3
+  retq

kernel/hal/x86_64/paging.h

@@ -0,0 +1,6 @@
+#ifndef HAL_PAGING_H_
+#define HAL_PAGING_H_
+
+void hal_loadpd(PgTable *cr3);
+
+#endif // HAL_PAGING_H_

kernel/hal/x86_64/pic.c

@@ -0,0 +1,22 @@
+#include <stddef.h>
+#include <stdint.h>
+#include "pic.h"
+#include "io.h"
+#include "intr.h"
+
+void pic_init(void) {
+  io_out8(PIC1_CMD, ICW1_INIT | ICW1_ICW4);
+  io_out8(PIC2_CMD, ICW1_INIT | ICW1_ICW4);
+
+  io_out8(PIC1_DATA, INTR_IRQBASE);
+  io_out8(PIC2_DATA, INTR_IRQBASE+8);
+
+  io_out8(PIC1_DATA, 2);
+  io_out8(PIC2_DATA, 2);
+
+  io_out8(PIC1_DATA, ICW4_8086);
+  io_out8(PIC2_DATA, ICW4_8086);
+
+  io_out8(PIC1_DATA, 0);
+  io_out8(PIC2_DATA, 0);
+}

kernel/hal/x86_64/pic.h

@@ -0,0 +1,25 @@
+#ifndef HAL_PIC_H_
+#define HAL_PIC_H_
+
+#define PIC1_CMD  0x0020
+#define PIC1_DATA 0x0021
+#define PIC2_CMD  0x00A0
+#define PIC2_DATA 0x00A1
+
+#define PIC_EOI 0x20
+
+#define ICW1_ICW4   0x01
+#define ICW1_SINGLE 0x02
+#define ICW1_ADI    0x04
+#define ICW1_LTIM   0x08
+#define ICW1_INIT   0x10
+
+#define ICW4_8086       0x01
+#define ICW4_AUTO       0x02
+#define ICW4_BUFSLAVE   0x04
+#define ICW4_BUFMASTER  0x0C
+#define ICW4_SFNM       0x10
+
+void pic_init(void);
+
+#endif // HAL_PIC_H_

kernel/hal/x86_64/pit.c

@@ -0,0 +1,40 @@
+#include <stdint.h>
+#include "pit.h"
+#include "io.h"
+
+#define PIT_COUNTER0      0x40
+#define PIT_CMD           0x43
+#define PIT_CMD_BINARY    0x00
+#define PIT_CMD_BCD       0x01
+#define PIT_CMD_MODE0     0x00
+#define PIT_CMD_MODE1     0x02
+#define PIT_CMD_MODE2     0x04
+#define PIT_CMD_MODE3     0x06
+#define PIT_CMD_MODE4     0x08
+#define PIT_CMD_MODE5     0x0A
+#define PIT_CMD_LATCH     0x00
+#define PIT_CMD_RW_LOW    0x10
+#define PIT_CMD_RW_HI     0x20
+#define PIT_CMD_RW_BOTH   0x30
+#define PIT_CMD_COUNTER0  0x00
+#define PIT_CMD_COUNTER1  0x40
+#define PIT_CMD_COUNTER2  0x80
+#define PIT_CMD_READBACK  0xC0
+
+#define PIT_FREQ 1193182
+
+volatile uint32_t PIT_TICKS;
+
+void pit_init(void) {
+  uint32_t hz = 1000;
+  uint32_t div = PIT_FREQ / hz;
+  io_out8(PIT_CMD, PIT_CMD_BINARY | PIT_CMD_MODE3 | PIT_CMD_RW_BOTH | PIT_CMD_COUNTER0);
+  io_out8(PIT_COUNTER0, div);
+  io_out8(PIT_COUNTER0, div >> 8);
+}
+
+void pit_wait(uint32_t ms) {
+  uint32_t now = PIT_TICKS;
+  ++ms;
+  while (PIT_TICKS - now < ms);
+}

kernel/hal/x86_64/pit.h

@@ -0,0 +1,11 @@
+#ifndef HAL_PIT_H_
+#define HAL_PIT_H_
+
+#include <stdint.h>
+
+extern volatile uint32_t PIT_TICKS;
+
+void pit_init(void);
+void pit_wait(uint32_t ms);
+
+#endif // HAL_PIT_H_

kernel/hal/x86_64/regs.S

@@ -0,0 +1,33 @@
+.macro _push_regs
+  push %rax
+  push %rcx
+  push %rdx
+  push %rsi
+  push %rdi
+  push %rbp
+  push %r8
+  push %r9
+  push %r10
+  push %r11
+  push %r12
+  push %r13
+  push %r14
+  push %r15
+.endm
+
+.macro _pop_regs
+  pop %r15
+  pop %r14
+  pop %r13
+  pop %r12
+  pop %r11
+  pop %r10
+  pop %r9
+  pop %r8
+  pop %rbp
+  pop %rdi
+  pop %rsi
+  pop %rdx
+  pop %rcx
+  pop %rax
+.endm

kernel/hal/x86_64/serial.c

@@ -1,51 +0,0 @@
-#include <stdint.h>
-#include <stdbool.h>
-#include "io.h"
-#include "putchar.h"
-
-#define SERIAL_PORT 0x3f8
-
-static int serial_received(void) {
-  return io_inb(SERIAL_PORT + 5) & 1;
-}
-
-static uint8_t serial_read(void) {
-  while (serial_received() == 0);
-  return io_inb(SERIAL_PORT);
-}
-
-static int serial_trans_empty(void) {
-  return io_inb(SERIAL_PORT + 5) & 0x20;
-}
-
-static void serial_write(uint8_t value) {
-  while (!serial_trans_empty());
-  io_outb(SERIAL_PORT, value);
-}
-
-// REFERENCE: https://wiki.osdev.org/Serial_Ports
-bool serial_init(void) {
-  io_outb(SERIAL_PORT + 1, 0x00); 
-  io_outb(SERIAL_PORT + 3, 0x80); 
-  io_outb(SERIAL_PORT + 0, 0x03);
-  io_outb(SERIAL_PORT + 1, 0x00);
-  io_outb(SERIAL_PORT + 3, 0x03);
-  io_outb(SERIAL_PORT + 2, 0xc7);
-  io_outb(SERIAL_PORT + 4, 0x0b);
-  io_outb(SERIAL_PORT + 4, 0x1e);
-  io_outb(SERIAL_PORT + 0, 0xae);
-
-  if (io_inb(SERIAL_PORT + 0) != 0xae) {
-    return false;
-  }
-
-  io_outb(SERIAL_PORT + 4, 0x0f);
-  return true;
-}
-
-#if PUTCHAR_ == PUTCHAR_SERIAL
-  // For printf library
-  void putchar_(char c) {
-    serial_write(c);
-  }
-#endif

kernel/hal/x86_64/serial.h

@@ -1,8 +0,0 @@
-#ifndef HAL_SERIAL_H_
-#define HAL_SERIAL_H_
-
-#include <stdbool.h>
-
-bool serial_init(void);
-
-#endif // HAL_SERIAL_H_

kernel/hal/x86_64/switch.S

@@ -0,0 +1,12 @@
+#include "regs.S"
+
+.global hal_switchproc
+hal_switchproc:
+  testq %rsi, %rsi
+  je 1f
+  movq %rsi, %cr3
+1:
+  mov %rdi, %rsp
+  _pop_regs
+  add $0x10, %rsp
+  iretq

kernel/hal/x86_64/switch.h

@@ -0,0 +1,6 @@
+#ifndef HAL_SWITCH_H_
+#define HAL_SWITCH_H_
+
+extern void hal_switchproc(void *newsp, PgTable *cr3);
+
+#endif // HAL_SWITCH_H_

kernel/hal/x86_64/vmm.c

@@ -0,0 +1,129 @@
+#include <stddef.h>
+#include <stdint.h>
+#include "vmm.h"
+#include "hal/hal.h"
+#include "bootinfo/bootinfo.h"
+#include "pmm/pmm.h"
+#include "paging.h"
+#include "proc/proc.h"
+#include "kprintf.h"
+#include "spinlock/spinlock.h"
+
+uint64_t KERNEL_CR3 = 0;
+SpinLock spinlock;
+
+uint64_t hal_vmm_current_cr3(void) {
+  uint64_t cr3;
+  asm volatile("mov %%cr3, %0" : "=r"(cr3));
+  return cr3;
+}
+
+PgIndex hal_vmm_pageindex(uint64_t vaddr) {
+  PgIndex ret;
+
+  ret.pml4 = (vaddr >> 39) & 0x1ff;
+  ret.pml3 = (vaddr >> 30) & 0x1ff;
+  ret.pml2 = (vaddr >> 21) & 0x1ff;
+  ret.pml1 = (vaddr >> 12) & 0x1ff;
+
+  return ret;
+}
+
+uint64_t *hal_vmm_nexttable(uint64_t *table, uint64_t ent, bool alloc) {
+  uint64_t entry = table[ent];
+  uint64_t phys;
+  if (entry & HAL_PG_PRESENT) {
+    phys = entry & ~0xFFFULL;
+  } else {
+    if (!alloc) {
+      return NULL;
+    }
+
+    uint8_t *newphys = pmm_alloc(1);
+    phys = (uint64_t)newphys;
+    hal_memset(VIRT(phys), 0, HAL_PAGE_SIZE);
+    table[ent] = phys | HAL_PG_USER | HAL_PG_RW | HAL_PG_PRESENT;
+  }
+  return (uint64_t *)((uint8_t *)VIRT(phys));
+}
+
+void hal_vmm_map_page(uint64_t cr3phys, uint64_t virtaddr, uint64_t physaddr, uint32_t flags) {
+  uint64_t *pml4 = (uint64_t *)VIRT(cr3phys);
+  PgIndex pi = hal_vmm_pageindex(virtaddr);
+
+  uint64_t *pml3 = hal_vmm_nexttable(pml4, pi.pml4, true);
+  uint64_t *pml2 = hal_vmm_nexttable(pml3, pi.pml3, true);
+  uint64_t *pml1 = hal_vmm_nexttable(pml2, pi.pml2, true);
+  uint64_t *pte = &pml1[pi.pml1];
+
+  *pte = (physaddr & ~0xFFFULL) | ((uint64_t)flags & 0x7ULL);
+}
+
+void hal_vmm_unmap_page(uint64_t cr3phys, uint64_t virtaddr, uint64_t physaddr) {
+  uint64_t *pml4 = (uint64_t *)VIRT(cr3phys);
+  PgIndex pi = hal_vmm_pageindex(virtaddr);
+  
+  uint64_t *pml3 = hal_vmm_nexttable(pml4, pi.pml4, false);
+  uint64_t *pml2 = hal_vmm_nexttable(pml3, pi.pml3, false);
+  uint64_t *pml1 = hal_vmm_nexttable(pml2, pi.pml2, false);
+  uint64_t *pte = &pml1[pi.pml1];
+
+  *pte &= ~HAL_PG_PRESENT;
+}
+
+void hal_vmm_map_range(uint64_t cr3phys, void *virtstart, void *physstart, size_t size, uint32_t flags) {
+  if (size % HAL_PAGE_SIZE != 0 || (uint64_t)virtstart % HAL_PAGE_SIZE != 0 || (uint64_t)physstart % HAL_PAGE_SIZE != 0) {
+    return;
+  }
+
+  spinlock_acquire(&spinlock);
+  uint8_t *vaddr = (uint8_t *)virtstart;
+  uint8_t *paddr = (uint8_t *)physstart;
+  uint8_t *end = (uint8_t *)virtstart + size;
+  for (; vaddr < end; vaddr += HAL_PAGE_SIZE, paddr += HAL_PAGE_SIZE) {
+    hal_vmm_map_page(cr3phys, (uint64_t)vaddr, (uint64_t)paddr, flags);
+  }
+  spinlock_release(&spinlock);
+}
+
+void hal_vmm_unmap_range(uint64_t cr3phys, void *virtstart, void *physstart, size_t size) {
+  if (size % HAL_PAGE_SIZE != 0 || (uint64_t)virtstart % HAL_PAGE_SIZE != 0 || (uint64_t)physstart % HAL_PAGE_SIZE != 0) {
+    return;
+  }
+
+  spinlock_acquire(&spinlock);
+  uint8_t *vaddr = (uint8_t *)virtstart;
+  uint8_t *paddr = (uint8_t *)physstart;
+  uint8_t *end = vaddr + size;
+
+  for (; vaddr < end; vaddr += HAL_PAGE_SIZE, paddr += HAL_PAGE_SIZE) {
+    hal_vmm_unmap_page(cr3phys, (uint64_t)vaddr, (uint64_t)paddr);
+  }
+  spinlock_release(&spinlock);
+}
+
+void hal_vmm_map_kern(uint64_t targetcr3) {
+  uint64_t *kcr3 = (uint64_t *)VIRT(KERNEL_CR3);
+  uint64_t *cr3 = (uint64_t *)VIRT(targetcr3);
+  for (size_t i = 0; i < 512; i++) {
+    cr3[i] = kcr3[i];
+  }
+}
+
+uint64_t hal_vmm_userproc_pml4_phys(void) {
+  uint8_t *cr3phys = pmm_alloc(1);
+  uint64_t phys = (uint64_t)cr3phys;
+  hal_memset(VIRT(phys), 0, HAL_PAGE_SIZE);
+
+  uint64_t *kcr3 = (uint64_t *)VIRT(KERNEL_CR3);
+  uint64_t *pml4 = (uint64_t *)VIRT(phys);
+  for (size_t i = 256; i < 512; i++) {
+    pml4[i] = kcr3[i];
+  }
+  return phys;
+}
+
+void hal_vmm_init(void) {
+  spinlock_init(&spinlock);
+  KERNEL_CR3 = hal_vmm_current_cr3();
+}

kernel/hal/x86_64/vmm.h

@@ -0,0 +1,63 @@
+#ifndef HAL_VMM_H_
+#define HAL_VMM_H_
+
+#include <stdint.h>
+#include <stdbool.h>
+#include <stddef.h>
+#include "compiler/attr.h"
+
+#define VIRT(X) ((void *)(BOOT_INFO.hhdm_off + (uint64_t)(X)))
+
+typedef struct VasRange {
+  struct VasRange *next;
+
+  uint8_t *virtstart;
+  uint8_t *physstart;
+  size_t size;
+  uint8_t pgflags;
+} PACKED VasRange;
+
+enum {
+  HAL_PG_PRESENT = 1<<0,
+  HAL_PG_RW      = 1<<1,
+  HAL_PG_USER    = 1<<2,
+};
+
+typedef struct {
+  uint16_t pml4;
+  uint16_t pml3;
+  uint16_t pml2;
+  uint16_t pml1;
+} PACKED PgIndex;
+
+typedef struct {
+  bool present: 1;
+  bool rw: 1;
+  bool user: 1;
+  bool writethrough: 1;
+  bool cachedisabled: 1;
+  bool accessed: 1;
+  bool dirty: 1;
+  bool hugepage: 1;
+  bool global: 1;
+  uint8_t avail: 3;
+  uint64_t addr: 40;
+  uint16_t osdef: 11;
+  bool nx: 1;
+} PACKED Pte;
+
+typedef struct {
+  Pte ents[512];
+} PACKED PgTable;
+
+extern uint64_t KERNEL_CR3;
+
+void hal_vmm_init(void);
+void hal_vmm_unmap_page(uint64_t cr3phys, uint64_t virtaddr, uint64_t physaddr);
+void hal_vmm_map_page(uint64_t cr3phys, uint64_t virtaddr, uint64_t physaddr, uint32_t flags);
+uint64_t hal_vmm_current_cr3(void);
+void hal_vmm_map_range(uint64_t cr3phys, void *virtstart, void *physstart, size_t size, uint32_t flags);
+void hal_vmm_unmap_range(uint64_t cr3phys, void *virtstart, void *physstart, size_t size);
+uint64_t hal_vmm_userproc_pml4_phys();
+
+#endif // HAL_VMM_H_

kernel/hshtb.h

@@ -4,47 +4,85 @@
 #include <stddef.h>
 #include <stdint.h>
 #include <stdbool.h>
+#include "hal/hal.h"
+#include "util/util.h"
 
-#define HSHTB_FNV32_BASE 0x811c9dc5
+#define HSHTB_FNV32_OFF 0x811c9dc5u
+#define HSHTB_FNV32_PRIME 0x01000193u
 
-static inline uint32_t hshtb_fnv32(char *s, size_t len) {
-  uint32_t h = HSHTB_FNV32_BASE;
+static inline uint32_t hshtb_fnv32(const void *data, size_t len) {
+  const unsigned char *p = (const unsigned char *)data;
+  uint32_t h = HSHTB_FNV32_OFF;
   for (size_t i = 0; i < len; i++) {
-    h ^= s[i];
-    h += (h << 1) + (h << 4) + (h << 7) + (h << 8) + (h << 24);
+    h ^= p[i];
+    h *= HSHTB_FNV32_PRIME;
   }
-  return h >> 8;
+  return h;
 }
 
-#define HSHTB_ALLOC(tb, name, k, keyname, out) \
+enum {
+  HSHTB_EMPTY = 0,
+  HSHTB_TAKEN = 1,
+  HSHTB_TOMB = 2,
+};
+
+#define __HSHTB_ARRAY_LEN(tb) \
+ ((void)sizeof(struct { int _[!!(sizeof(tb) % sizeof((tb)[0]) == 0)]; }) , (sizeof(tb) / sizeof((tb)[0])))
+
+#define HSHTB_ALLOC(tb, keyfield, k, out) \
   do { \
-    size_t len = sizeof((tb)->name) / sizeof((tb)->name[0]); \
-    size_t idx = hshtb_fnv32(k, hal_strlen(k)) % len; \
-    size_t i = idx; \
+    size_t __len = __HSHTB_ARRAY_LEN(tb); \
+    uint32_t __h = hshtb_fnv32((k), hal_strlen((k))); \
+    size_t __idx = __h % __len; \
+    size_t __start = __idx; \
+    typeof(&(tb)[0]) __tomb = NULL; \
+    (out) = NULL; \
     do { \
-      if (!(tb)->name[i].taken) { \
-        (out) = &((tb)->name[i]); \
-        hal_memset((out), 0, sizeof(*(out))); \
-        (out)->taken = true; \
-        hal_memcpy((out)->keyname, k, hal_strlen(k)); \
+      if ((tb)[__idx]._hshtbstate == HSHTB_EMPTY) { \
+        typeof(&(tb)[0]) __slot = __tomb ? __tomb : &(tb)[__idx]; \
+        hal_memset(__slot, 0, sizeof(*__slot)); \
+        __slot->_hshtbstate = HSHTB_TAKEN; \
+        hal_memcpy(__slot->keyfield, (k), MIN(sizeof(__slot->keyfield) - 1, hal_strlen((k)))); \
+        (out) = __slot; \
         break; \
       } \
-      i = (i + 1) % len; \
-    } while(i != idx); \
+      if ((tb)[__idx]._hshtbstate == HSHTB_TAKEN && hal_strcmp((tb)[__idx].keyfield, (k)) == 0) { \
+        (out) = &(tb)[__idx]; \
+        break; \
+      } \
+      if ((tb)[__idx]._hshtbstate == HSHTB_TOMB && !__tomb) { \
+        __tomb = &(tb)[__idx]; \
+      } \
+      __idx = (__idx + 1) % __len; \
+    } while(__idx != __start); \
   } while(0)
 
-#define HSHTB_GET(tb, name, k, keyname, out) \
+#define HSHTB_GET(tb, keyfield, k, out) \
   do { \
-    size_t len = sizeof((tb)->name) / sizeof((tb)->name[0]); \
-    size_t idx = hshtb_fnv32(k, hal_strlen(k)) % len; \
-    size_t i = idx; \
+    size_t __len = __HSHTB_ARRAY_LEN(tb); \
+    uint32_t __h = hshtb_fnv32((k), hal_strlen((k))); \
+    size_t __idx = __h % __len; \
+    size_t __start = __idx; \
+    (out) = NULL; \
     do { \
-      if (hal_memcmp((tb)->name[i].keyname, k, hal_strlen(k)) == 0) { \
-        (out) = &((tb)->name[i]); \
+      if ((tb)[__idx]._hshtbstate == HSHTB_EMPTY) { \
         break; \
       } \
-      i = (i + 1) % len; \
-    } while(i != idx); \
+      if ((tb)[__idx]._hshtbstate == HSHTB_TAKEN && hal_strcmp((tb)[__idx].keyfield, (k)) == 0) { \
+        (out) = &(tb)[__idx]; \
+        break; \
+      } \
+      __idx = (__idx + 1) % __len; \
+    } while(__idx != __start); \
+  } while(0)
+
+#define HSHTB_DELETE(tb, keyfield, k) \
+  do { \
+    typeof(&(tb)[0]) __e; \
+    HSHTB_GET((tb), (keyfield), (k), __e); \
+    if (__e) { \
+      __e->_hshtbstate = HSHTB_TOMB; \
+    } \
   } while(0)
 
 #endif // HSHTB_H_

kernel/ipc/pipe/pipe.c

@@ -0,0 +1,53 @@
+#include <stdint.h>
+#include <stddef.h>
+#include "rbuf/rbuf.h"
+#include "spinlock/spinlock.h"
+#include "hal/hal.h"
+#include "dlmalloc/malloc.h"
+#include "errors.h"
+#include "pipe.h"
+#include "kprintf.h"
+
+int32_t ipc_pipeinit(IpcPipe *pipe, uint64_t pid) {
+  hal_memset(pipe, 0, sizeof(*pipe));
+  spinlock_init(&pipe->spinlock);
+  pipe->ownerpid = pid;
+  
+  uint8_t *buf = dlmalloc(IPC_PIPE_MAX);
+  if (buf == NULL) {
+    return E_NOMEMORY;
+  }
+  
+  rbuf_init(&pipe->rbuf, buf, IPC_PIPE_MAX);
+
+  return E_OK;
+}
+
+void ipc_pipefree(IpcPipe *pipe) {
+  if (pipe->rbuf.buffer != NULL) {
+    dlfree(pipe->rbuf.buffer);
+  }
+}
+
+int32_t ipc_pipewrite(IpcPipe *pipe, const uint8_t *const buffer, size_t n) {
+  size_t i = 0;
+  spinlock_acquire(&pipe->spinlock);
+  for (; i < n; i++) {
+    rbuf_push(&pipe->rbuf, buffer[i]);
+  }
+  spinlock_release(&pipe->spinlock);
+  return i;
+}
+
+int32_t ipc_piperead(IpcPipe *pipe, uint8_t *const buffer, size_t n) {
+  size_t i = 0;
+  spinlock_acquire(&pipe->spinlock);
+  while (i < n) {
+    if (rbuf_pop(&pipe->rbuf, &buffer[i]) < 0) {
+      break;
+    }
+    i++;
+  }
+  spinlock_release(&pipe->spinlock);
+  return i;
+}

kernel/ipc/pipe/pipe.h

@@ -0,0 +1,23 @@
+#ifndef IPC_PIPE_PIPE_H_
+#define IPC_PIPE_PIPE_H_
+
+#include <stdint.h>
+#include <stddef.h>
+#include "rbuf/rbuf.h"
+#include "spinlock/spinlock.h"
+
+#define IPC_PIPE_MAX 0x1000
+
+typedef struct IpcPipe {
+  struct IpcPipe *next;
+  RBuf rbuf;
+  SpinLock spinlock;
+  uint64_t ownerpid;
+} IpcPipe;
+
+int32_t ipc_pipeinit(IpcPipe *pipe, uint64_t pid);
+void ipc_pipefree(IpcPipe *pipe);
+int32_t ipc_pipewrite(IpcPipe *pipe, const uint8_t *const buffer, size_t n);
+int32_t ipc_piperead(IpcPipe *pipe, uint8_t *const buffer, size_t n);
+
+#endif // IPC_PIPE_PIPE_H_

kernel/kmain.c

@@ -5,11 +5,49 @@
 #include "bootinfo/bootinfo.h"
 #include "pmm/pmm.h"
 #include "term/term.h"
-#include "paging/paging.h"
 #include "dlmalloc/malloc.h"
 #include "vfs/vfs.h"
 #include "baseimg/baseimg.h"
 #include "storedev/storedev.h"
+#include "util/util.h"
+#include "proc/proc.h"
+#include "dev/dev.h"
+
+const char *human_size(uint64_t bytes, char *buf, size_t bufsize) {
+  static const char *units[] = { "B", "KiB", "MiB", "GiB", "TiB", "PiB" };
+  int unit = 0;
+
+  // Scale down until value fits nicely
+  uint64_t rem = 0;
+  while (bytes >= 1024 && unit < (int)(sizeof(units)/sizeof(units[0])) - 1) {
+    rem = bytes % 1024;
+    bytes /= 1024;
+    unit++;
+  }
+
+  if (unit == 0) {
+    // Just bytes
+    ksnprintf(buf, bufsize, "%llu %s", (unsigned long long)bytes, units[unit]);
+  } else {
+    // Show one decimal place without using floats
+    // Multiply remainder by 10 to get first decimal digit
+    uint64_t frac = (rem * 10 + 512) / 1024; // rounded
+    if (frac == 10) { // handle carry, e.g. 1023.9 -> 1024.0
+      bytes++;
+      frac = 0;
+    }
+
+    if (frac > 0) ksnprintf(buf, bufsize, "%llu.%llu %s", (unsigned long long)bytes, (unsigned long long)frac, units[unit]);
+    else ksnprintf(buf, bufsize, "%llu %s", (unsigned long long)bytes, units[unit]);
+  }
+
+  return buf;
+}
+
+void log_bootinfo(void) {
+  char buf[100];
+  LOG("kmain", "Memory total = %s\n", human_size(BOOT_INFO.memmap_total, buf, sizeof(buf)));
+}
 
 static volatile LIMINE_BASE_REVISION(2);
 
@@ -19,16 +57,16 @@ void kmain(void) {
   }
 
   bootinfo_init();
-  term_init();
+  term_init(BOOT_INFO.fb->address);
+  log_bootinfo();
   hal_init();
   pmm_init();
-  paging_init();
-  dlmalloc_check();
+  hal_vmm_init();
   storedev_init();
   baseimg_init();
   vfs_init();
+  dev_init();
+  proc_init();
 
-  kprintf(BANNER_TEXT "\n");
-
-  hal_hang();
+  for(;;);
 }

kernel/kprintf.h

@@ -2,8 +2,16 @@
 #define KPRINTF_H_
 
 #include <printf/printf.h>
+#include "term/term.h"
+#include "spinlock/spinlock.h"
+
+#define kprintf(fmt, ...) \
+  do { \
+    spinlock_acquire(&TERM.spinlock); \
+    printf_(fmt, ##__VA_ARGS__); \
+    spinlock_release(&TERM.spinlock); \
+  } while(0)
 
-#define kprintf     printf_
 #define ksprintf    sprintf_
 #define kvsprintf   vsprintf_
 #define ksnprintf   snprintf_

kernel/paging/paging.h

@@ -1,10 +0,0 @@
-#ifndef PAGING_PAGING_H_
-#define PAGING_PAGING_H_
-
-#include <stddef.h>
-#include <stdint.h>
-
-void paging_init(void);
-size_t paging_virt2phys(size_t virtaddr);
-
-#endif // PAGING_PAGING_H_

kernel/paging/x86_64/paging.c

@@ -1,124 +0,0 @@
-#include <stdint.h>
-#include <stddef.h>
-#include <limits.h>
-#include "paging/paging.h"
-#include "hal/hal.h"
-#include "bootinfo/bootinfo.h"
-#include "util/util.h"
-#include "kprintf.h"
-
-enum {
-  PF_PRESENT      = 1<<0,
-  PF_READWRITE    = 1<<1,
-  PF_USER         = 1<<2,
-  PF_WRITETHROUGH = 1<<3,
-  PF_NOCACHE      = 1<<4,
-  PF_ACCESS       = 1<<5,
-  PF_DIRTY        = 1<<6,
-  PF_PAGESIZE     = 1<<7,
-  PF_ATTRTAB      = 1<<7,
-  PF_GLOBAL       = 1<<8,
-  PF_SHARED       = 1<<9,
-  PF_CACHE_WC     = PF_ATTRTAB | PF_WRITETHROUGH,
-};
-
-#define PGSHIFT_PML4E   39
-#define PGSHIFT_PDPTE   30
-#define PGSHIFT_PDE     21
-#define PGSHIFT_PTE     12
-#define PGMASK_ENTRY    0x1ff
-#define PGMASK_OFFSET   0x3ff
-
-#define BITS_TO_VIRT_ADDR(pml4_index, pdpte_index, pd_index, pt_index)         \
-  (((uint64_t)pml4_index << PGSHIFT_PML4E) |                                   \
-   ((uint64_t)pdpte_index << PGSHIFT_PDPTE) |                                  \
-   ((uint64_t)pd_index << PGSHIFT_PDE) | ((uint64_t)pt_index << PGSHIFT_PTE))
-
-// Workaround repeated characters
-#define AMD64_MM_STRIPSX(a) ((uintptr_t)(a) & 0xFFFFFFFFFFFF)
-#define AMD64_MM_ADDRSX(a)                                                     \
-  (((uintptr_t)(a) & (1ULL << 47)) ? (0xFFFFFF0000000000 | ((uintptr_t)(a)))   \
-                                   : ((uintptr_t)(a)))
-
-// Virtual address' macros
-#define PML4E(a) (((a) >> PGSHIFT_PML4E) & PGMASK_ENTRY)
-#define PDPTE(a) (((a) >> PGSHIFT_PDPTE) & PGMASK_ENTRY)
-#define PDE(a) (((a) >> PGSHIFT_PDE) & PGMASK_ENTRY)
-#define PTE(a) (((a) >> PGSHIFT_PTE) & PGMASK_ENTRY)
-
-#define PTE_ADDR_MASK 0x000ffffffffff000
-#define PTE_GET_ADDR(VALUE) ((VALUE) & PTE_ADDR_MASK)
-#define PTE_GET_FLAGS(VALUE) ((VALUE) & ~PTE_ADDR_MASK)
-
-#define PAGE_MASK(x) ((1 << (x)) - 1)
-
-#define USER_STACK_PAGES 2048
-#define PAGE_SIZE 0x1000
-#define PAGE_SIZE_LARGE 0x200000
-#define PAGE_SIZE_HUGE 0x40000000
-
-#define P_PHYs_ADD(x) ((x) & ~0xfff)
-
-uint64_t *global_page_dir = NULL;
-
-void paging_init(void) {
-  uint64_t pdphys = 0;
-  asm volatile("movq %%cr3, %0" : "=r"(pdphys));
-  if (!pdphys) {
-    ERR("paging", "could not get default page dir\n");
-    hal_hang();
-  }
-
-  uint64_t pdvirt = pdphys + BOOT_INFO.hhdm_off;
-  global_page_dir = (uint64_t *)pdvirt;
-
-  LOG("paging", "global_page_dir = %p\n", global_page_dir);
-}
-
-size_t _paging_virt2phys(uint64_t *pgdir, size_t virtaddr) {
-  if (!pgdir) return 0;
-
-  if (virtaddr >= BOOT_INFO.hhdm_off
-   && virtaddr <= (BOOT_INFO.hhdm_off + MAX(BOOT_INFO.memmap_total, UINT32_MAX))) {
-    return virtaddr - BOOT_INFO.hhdm_off;
-  }
-
-  size_t virtaddr_init = virtaddr;
-  virtaddr &= ~0xfff;
-
-  virtaddr = AMD64_MM_STRIPSX(virtaddr);
-
-  uint32_t pml4idx = PML4E(virtaddr);
-  uint32_t pdpidx = PDPTE(virtaddr);
-  uint32_t pdidx = PDE(virtaddr);
-  uint32_t ptidx = PTE(virtaddr);
-
-  if (!(pgdir[pml4idx] & PF_PRESENT)) {
-    return 0;
-  }
-
-  size_t *pdp = (size_t *)(PTE_GET_ADDR(pgdir[pml4idx]) + BOOT_INFO.hhdm_off);
-
-  if (!(pdp[pdpidx] & PF_PRESENT)) {
-    return 0;
-  }
-
-  size_t *pd = (size_t *)(PTE_GET_ADDR(pdp[pdpidx]) + BOOT_INFO.hhdm_off);
-
-  if (!(pd[pdidx] & PF_PRESENT)) {
-    return 0;
-  }
-
-  size_t *pt = (size_t *)(PTE_GET_ADDR(pd[pdidx]) + BOOT_INFO.hhdm_off);
-
-  if (pt[ptidx] & PF_PRESENT) {
-    return (size_t)(PTE_GET_ADDR(pt[ptidx]) + ((size_t)virtaddr_init & 0xfff));
-  }
-
-  return 0;
-}
-
-size_t paging_virt2phys(size_t virtaddr) {
-  return _paging_virt2phys(global_page_dir, virtaddr);
-}
-

kernel/path/path.c

@@ -0,0 +1,41 @@
+#include "path.h"
+
+void path_parse(const char *in, char *mp, char *path) {
+  if (in == 0 || *in == 0) {
+    mp[0] = 0;
+    path[0] = 0;
+    return;
+  }
+
+  int i = 0, j = 0, colonfound = 0;
+
+  while (in[i]) {
+    if (in[i] == ':') {
+      if (colonfound) {
+        mp[0] = 0;
+        path[0] = 0;
+        return;
+      }
+      colonfound = 1;
+      mp[i] = 0;
+      i++;
+      continue;
+    }
+
+    if (!colonfound) {
+      mp[i] = in[i];
+    } else {
+      path[j++] = in[i];
+    }
+
+    i++;
+  }
+
+  if (!colonfound) {
+    mp[i] = 0;
+    path[0] = 0;
+  } else {
+    path[j] = 0;
+  }
+}
+

kernel/path/path.h

@@ -0,0 +1,6 @@
+#ifndef PATH_PATH_H_
+#define PATH_PATH_H_
+
+void path_parse(const char *in, char *mp, char *path);
+
+#endif // PATH_PATH_H_

kernel/pmm/pmm.c

@@ -6,6 +6,7 @@
 #include "bootinfo/bootinfo.h"
 #include "spinlock/spinlock.h"
 #include "util/util.h"
+#include "hal/hal.h"
 
 PhysMem PHYS_MEM;
 
@@ -13,7 +14,6 @@ void pmm_init(void) {
   spinlock_init(&PHYS_MEM.spinlock);
 
   BitMap *bm = &PHYS_MEM.self;
-  bm->init = false;
 
   bm->nblocks = _DIV_ROUNDUP(BOOT_INFO.memmap_total, BITMAP_BLOCK_SIZE);
   bm->nbytes = _DIV_ROUNDUP(bm->nblocks, 8);
@@ -40,6 +40,9 @@ void pmm_init(void) {
   hal_memset(bm->map, 0xff, bm->nbytes);
   for (size_t i = 0; i < BOOT_INFO.memmap_entrycount; i++) {
     struct limine_memmap_entry *entry = BOOT_INFO.memmap_entries[i];
+    if (entry == memmap_ent) {
+      continue;
+    }
     // mark usable as 0 and unusable as 1
     bitmap_markregion(bm, (void *)entry->base, entry->length, entry->type != LIMINE_MEMMAP_USABLE);
   }
@@ -48,7 +51,6 @@ void pmm_init(void) {
   bm->alloc_blocks = 0;
 
   LOG("pmm", "phys bitmap init 0x%lx, size = 0x%lx\n", physbegin, bm->nbytes);
-  bm->init = true;
 }
 
 void *pmm_alloc(size_t pages) {
@@ -58,7 +60,7 @@ void *pmm_alloc(size_t pages) {
 
   if (!phys) {
     ERR("pmm", "phys memory ran out\n");
-    hal_hang();
+    return NULL;
   }
   return (void *)phys;
 }

kernel/printf/printf.c

@@ -0,0 +1 @@
+../../share/printf/printf.c

kernel/printf/printf.h

@@ -1,236 +0,0 @@
-/**
- * @author (c) Eyal Rozenberg <eyalroz1@gmx.com>
- *             2021-2023, Haifa, Palestine/Israel
- * @author (c) Marco Paland (info@paland.com)
- *             2014-2019, PALANDesign Hannover, Germany
- *
- * @note Others have made smaller contributions to this file: see the
- * contributors page at https://github.com/eyalroz/printf/graphs/contributors
- * or ask one of the authors.
- *
- * @brief Small stand-alone implementation of the printf family of functions
- * (`(v)printf`, `(v)s(n)printf` etc., geared towards use on embedded systems
- * with a very limited resources.
- *
- * @note the implementations are thread-safe; re-entrant; use no functions from
- * the standard library; and do not dynamically allocate any memory.
- *
- * @license The MIT License (MIT)
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
- * THE SOFTWARE.
- */
-
-#ifndef PRINTF_H_
-#define PRINTF_H_
-
-#ifdef __cplusplus
-# include <cstdarg>
-# include <cstddef>
-extern "C" {
-#else
-# include <stdarg.h>
-# include <stddef.h>
-#endif
-
-#ifdef __GNUC__
-# if ((__GNUC__ == 4 && __GNUC_MINOR__>= 4) || __GNUC__ > 4)
-#  define ATTR_PRINTF(one_based_format_index, first_arg) \
-__attribute__((format(gnu_printf, (one_based_format_index), (first_arg))))
-# else
-# define ATTR_PRINTF(one_based_format_index, first_arg) \
-__attribute__((format(printf, (one_based_format_index), (first_arg))))
-# endif
-# define ATTR_VPRINTF(one_based_format_index) \
-ATTR_PRINTF((one_based_format_index), 0)
-#else
-# define ATTR_PRINTF(one_based_format_index, first_arg)
-# define ATTR_VPRINTF(one_based_format_index)
-#endif
-
-#ifndef PRINTF_ALIAS_STANDARD_FUNCTION_NAMES_SOFT
-#define PRINTF_ALIAS_STANDARD_FUNCTION_NAMES_SOFT 0
-#endif
-
-#ifndef PRINTF_ALIAS_STANDARD_FUNCTION_NAMES_HARD
-#define PRINTF_ALIAS_STANDARD_FUNCTION_NAMES_HARD 0
-#endif
-
-#if PRINTF_ALIAS_STANDARD_FUNCTION_NAMES_HARD
-# define printf_    printf
-# define sprintf_   sprintf
-# define vsprintf_  vsprintf
-# define snprintf_  snprintf
-# define vsnprintf_ vsnprintf
-# define vprintf_   vprintf
-#endif
-
-// If you want to include this implementation file directly rather than
-// link against it, this will let you control the functions' visibility,
-// e.g. make them static so as not to clash with other objects also
-// using them.
-#ifndef PRINTF_VISIBILITY
-#define PRINTF_VISIBILITY
-#endif
-
-/**
- * Prints/send a single character to some opaque output entity
- *
- * @note This function is not implemented by the library, only declared; you
- * must provide an implementation if you wish to use the @ref printf / @ref
- * vprintf function (and possibly for linking against the library, if your
- * toolchain does not support discarding unused functions)
- *
- * @note The output could be as simple as a wrapper for the `write()` system
- * call on a Unix-like * system, or even libc's @ref putchar , for replicating
- * actual functionality of libc's @ref printf * function; but on an embedded
- * system it may involve interaction with a special output device, like a UART,
- * etc.
- *
- * @note in libc's @ref putchar, the parameter type is an int; this was intended
- * to support the representation of either a proper character or EOF in a
- * variable - but this is really not meaningful to pass into @ref putchar and is
- * discouraged today. See further discussion in:
- * @link https://stackoverflow.com/q/17452847/1593077
- *
- * @param c the single character to print
- */
-PRINTF_VISIBILITY
-void putchar_(char c);
-
-
-/**
- * An implementation of the C standard's printf/vprintf
- *
- * @note you must implement a @ref putchar_ function for using this function -
- * it invokes @ref putchar_ * rather than directly performing any I/O (which
- * insulates it from any dependence on the operating system * and external
- * libraries).
- *
- * @param format A string specifying the format of the output, with %-marked
- *     specifiers of how to interpret additional arguments.
- * @param arg Additional arguments to the function, one for each %-specifier in
- *     @p format
- * @return The number of characters written into @p s, not counting the
- *     terminating null character
- */
- ///@{
-PRINTF_VISIBILITY
-int printf_(const char* format, ...) ATTR_PRINTF(1, 2);
-PRINTF_VISIBILITY
-int vprintf_(const char* format, va_list arg) ATTR_VPRINTF(1);
-///@}
-
-
-/**
- * An implementation of the C standard's sprintf/vsprintf
- *
- * @note For security considerations (the potential for exceeding the buffer
- * bounds), please consider using the size-constrained variant, @ref snprintf /
- * @ref vsnprintf, instead.
- *
- * @param s An array in which to store the formatted string. It must be large
- *     enough to fit the formatted output!
- * @param format A string specifying the format of the output, with %-marked
- *     specifiers of how to interpret additional arguments
- * @param arg Additional arguments to the function, one for each specifier in
- *     @p format
- * @return The number of characters written into @p s, not counting the
- *     terminating null character
- */
-///@{
-PRINTF_VISIBILITY
-int  sprintf_(char* s, const char* format, ...) ATTR_PRINTF(2, 3);
-PRINTF_VISIBILITY
-int vsprintf_(char* s, const char* format, va_list arg) ATTR_VPRINTF(2);
-///@}
-
-
-/**
- * An implementation of the C standard's snprintf/vsnprintf
- *
- * @param s An array in which to store the formatted string. It must be large
- *     enough to fit either the entire formatted output, or at least @p n
- *     characters. Alternatively, it can be NULL, in which case nothing will
- *     be printed, and only the number of characters which _could_ have been
- *     printed is tallied and returned.
- * @param n The maximum number of characters to write to the array, including
- *     a terminating null character
- * @param format A string specifying the format of the output, with %-marked
- *     specifiers of how to interpret additional arguments.
- * @param arg Additional arguments to the function, one for each specifier in
- *     @p format
- * @return The number of characters that COULD have been written into @p s, not
- *     counting the terminating null character. A value equal or larger than
- *     @p n indicates truncation. Only when the returned value is non-negative
- *     and less than @p n, the null-terminated string has been fully and
- *     successfully printed.
- */
-///@{
-PRINTF_VISIBILITY
-int  snprintf_(char* s, size_t count, const char* format, ...) ATTR_PRINTF(3, 4);
-PRINTF_VISIBILITY
-int vsnprintf_(char* s, size_t count, const char* format, va_list arg) ATTR_VPRINTF(3);
-///@}
-
-/**
- * printf/vprintf with user-specified output function
- *
- * An alternative to @ref printf_, in which the output function is specified
- * dynamically (rather than @ref putchar_ being used)
- *
- * @param out An output function which takes one character and a type-erased
- *     additional parameters
- * @param extra_arg The type-erased argument to pass to the output function @p
- *     out with each call
- * @param format A string specifying the format of the output, with %-marked
- *     specifiers of how to interpret additional arguments.
- * @param arg Additional arguments to the function, one for each specifier in
- *     @p format
- * @return The number of characters for which the output f unction was invoked,
- *     not counting the terminating null character
- *
- */
-PRINTF_VISIBILITY
-int fctprintf(void (*out)(char c, void* extra_arg), void* extra_arg, const char* format, ...) ATTR_PRINTF(3, 4);
-PRINTF_VISIBILITY
-int vfctprintf(void (*out)(char c, void* extra_arg), void* extra_arg, const char* format, va_list arg) ATTR_VPRINTF(3);
-
-#ifdef __cplusplus
-} // extern "C"
-#endif
-
-#if PRINTF_ALIAS_STANDARD_FUNCTION_NAMES_HARD
-# undef printf_
-# undef sprintf_
-# undef vsprintf_
-# undef snprintf_
-# undef vsnprintf_
-# undef vprintf_
-#else
-#if PRINTF_ALIAS_STANDARD_FUNCTION_NAMES_SOFT
-# define printf     printf_
-# define sprintf    sprintf_
-# define vsprintf   vsprintf_
-# define snprintf   snprintf_
-# define vsnprintf  vsnprintf_
-# define vprintf    vprintf_
-#endif
-#endif
-
-#endif  // PRINTF_H_

kernel/printf/printf.h

@@ -0,0 +1 @@
+../../share/printf/printf.h

kernel/printf/printf_config.h

@@ -1,2 +0,0 @@
-#define PRINTF_SUPPORT_DECIMAL_SPECIFIERS 0
-#define PRINTF_SUPPORT_EXPONENTIAL_SPECIFIERS 0

kernel/printf/printf_config.h

@@ -0,0 +1 @@
+../../share/printf/printf_config.h

kernel/proc/proc.c

@@ -0,0 +1,260 @@
+#include <stdint.h>
+#include <stdlib.h>
+#include <stdbool.h>
+#include "hal/hal.h"
+#include "spinlock/spinlock.h"
+#include "proc.h"
+#include "dlmalloc/malloc.h"
+#include "pmm/pmm.h"
+#include "util/util.h"
+#include "kprintf.h"
+#include "elf.h"
+#include "errors.h"
+#include "vfs/vfs.h"
+#include "bootinfo/bootinfo.h"
+#include "ipc/pipe/pipe.h"
+#include "sysdefs/processctl.h"
+#include "sysdefs/ioctl.h"
+
+#define PROC_REAPER_FREQ 30
+
+uint64_t pids = 0;
+uint64_t sched_ticks = 0;
+
+Procs PROCS;
+
+bool proc_checkelf(uint8_t *elf) {
+  if (elf[0] != 0x7f || elf[1] != 'E' || elf[2] != 'L' || elf[3] != 'F') {
+    return false;
+  }
+  return true;
+}
+
+ElfAuxval proc_load_elf_segs(Proc *proc, uint8_t *data) {
+  ElfAuxval aux = {0};
+
+  Elf64_Ehdr *elfhdr = (Elf64_Ehdr *)data;
+  aux.entry = elfhdr->e_entry;
+  aux.phnum = elfhdr->e_phnum;
+  aux.phent = elfhdr->e_phentsize;
+
+  for (uint64_t seg = 0; seg < elfhdr->e_phnum; seg++) {
+    Elf64_Phdr *phdr = (Elf64_Phdr *)(data + elfhdr->e_phoff + (elfhdr->e_phentsize * seg));
+
+    switch (phdr->p_type) {
+      case PT_PHDR: {
+        aux.phdr = (uint64_t)phdr->p_vaddr;
+      } break;
+      case PT_LOAD: {
+        uint64_t off = phdr->p_vaddr & (HAL_PAGE_SIZE - 1);
+        uint64_t blocks = (off + phdr->p_memsz + HAL_PAGE_SIZE - 1) / HAL_PAGE_SIZE;
+
+        uint8_t *physaddr = pmm_alloc(blocks);
+        uint8_t *virtaddr = (uint8_t *)(phdr->p_vaddr & ~(HAL_PAGE_SIZE - 1));
+
+        hal_memset(VIRT(physaddr), 0, blocks * HAL_PAGE_SIZE);
+        hal_memcpy(VIRT(physaddr) + off, (data + phdr->p_offset), phdr->p_filesz);
+
+        uint32_t pgflags = HAL_PG_USER | HAL_PG_PRESENT;
+        if (phdr->p_flags & PF_W) {
+          pgflags |= HAL_PG_RW;
+        }
+        hal_vmm_map_range(proc->platformdata.cr3, virtaddr, physaddr, blocks * HAL_PAGE_SIZE, pgflags);
+
+        VasRange *range = dlmalloc(sizeof(*range));
+        range->virtstart = virtaddr;
+        range->physstart = physaddr;
+        range->size = blocks * HAL_PAGE_SIZE;
+        range->pgflags = pgflags;
+
+        LL_APPEND(proc->vas, range);
+      } break;
+    }
+  }
+  return aux;
+}
+
+Proc *proc_spawnuser(char *mountpoint, char *path) {
+  IoctlStat stat;
+  if (vfs_stat(mountpoint, path, &stat) != E_OK) {
+    return NULL;
+  }
+
+  if (stat.type != IOCTLSTAT_FILE) {
+    return NULL;
+  }
+
+  VfsObj *vobj = vfs_open(mountpoint, path, VFS_FLAG_READ);
+  if (vobj == NULL) {
+    return NULL;
+  }
+
+  uint8_t *data = dlmalloc(stat.size);
+  if (data == NULL) {
+    vfs_close(vobj);
+    return NULL;
+  }
+
+  if (vobj->read(vobj, data, stat.size, 0) != E_OK) {
+    dlfree(data);
+    vfs_close(vobj);
+    return NULL;
+  }
+
+  vfs_close(vobj);
+
+  Proc *proc = dlmalloc(sizeof(*proc));
+  hal_memset(proc, 0, sizeof(*proc));
+  ksprintf(proc->name, "%s:%s", mountpoint, path);
+  
+  hal_memset(&proc->platformdata.trapframe, 0, sizeof(proc->platformdata.trapframe));
+  proc->platformdata.cr3 = hal_vmm_userproc_pml4_phys();
+
+  uint8_t *kstackp = (uint8_t *)pmm_alloc(PROC_STACKBLOCKS) + PROC_STACKSIZE;
+  proc->platformdata.kstack = kstackp;
+  uint8_t *pstackp = (uint8_t *)pmm_alloc(PROC_STACKBLOCKS);
+  proc->platformdata.pstack = pstackp;
+
+  uint64_t virttop = PROC_USER_STACK_TOP;
+  uint64_t virtbase = virttop - PROC_STACKSIZE;
+
+  uint32_t flags = HAL_PG_RW | HAL_PG_PRESENT | HAL_PG_USER;
+  hal_vmm_map_range(proc->platformdata.cr3, (void *)virtbase, (void *)pstackp, PROC_STACKSIZE, flags);
+
+  VasRange *range = dlmalloc(sizeof(*range));
+  range->virtstart = (uint8_t *)virtbase;
+  range->physstart = (uint8_t *)pstackp;
+  range->size = PROC_STACKSIZE;
+  range->pgflags = flags;
+  LL_APPEND(proc->vas, range);
+
+  ElfAuxval aux = proc_load_elf_segs(proc, data);
+  dlfree(data);
+
+  proc->platformdata.trapframe.ss = 0x20 | 0x3;
+  proc->platformdata.trapframe.rsp = (uint64_t)virttop;
+  proc->platformdata.trapframe.rflags = 0x202;
+  proc->platformdata.trapframe.cs = 0x18 | 0x3;
+  proc->platformdata.trapframe.rip = aux.entry;
+  proc->state = PROC_EMBRYO;
+  proc->pid = pids++;
+  proc->mman_map_base = PROC_MMAN_MAP_BASE;
+  spinlock_init(&proc->pipes_spinlock);
+  spinlock_init(&proc->devs_spinlock);
+
+  proc->pipes[0] = dlmalloc(sizeof(IpcPipe));
+  ipc_pipeinit(proc->pipes[0], proc->pid);
+  proc->pipes[1] = dlmalloc(sizeof(IpcPipe));
+  ipc_pipeinit(proc->pipes[1], proc->pid);
+
+  return proc;
+}
+
+void proc_register(Proc *proc) {
+  spinlock_acquire(&PROCS.spinlock);
+  LL_APPEND(PROCS.procs, proc);
+  spinlock_release(&PROCS.spinlock);
+}
+
+Proc *proc_nextready(void) {
+  Proc *proc = PROCS.current->next;
+  for (;;) {
+    if (proc == NULL) {
+      proc = PROCS.procs;
+    }
+    if (proc->state == PROC_READY) {
+      return proc;
+    }
+    proc = proc->next;
+  }
+}
+
+void proc_reaper(void) {
+  spinlock_acquire(&PROCS.spinlock);
+  Proc *head, *tmp;
+  LL_FOREACH_SAFE(PROCS.procs, head, tmp) {
+    if (head->state != PROC_ZOMBIE) {
+      continue;
+    }
+
+    Proc *zombie = head;
+    LL_REMOVE(PROCS.procs, zombie);
+
+    for (size_t i = 0; i < zombie->vobjcnt; i++) {
+      if (zombie->vobjs[i] != NULL) {
+        vfs_close(zombie->vobjs[i]);
+        zombie->vobjs[i] = NULL;
+      }
+    }
+
+    for (size_t i = 0; i < PROC_PIPEHANDLES_MAX; i++) {
+      if (zombie->pipes[i] != NULL && zombie->pipes[i]->ownerpid == zombie->pid) {
+        dlfree(zombie->pipes[i]);
+        ipc_pipefree(zombie->pipes[i]);
+        zombie->pipes[i] = NULL;
+      }
+    }
+
+    pmm_free((uintptr_t)(zombie->platformdata.kstack - PROC_STACKSIZE), PROC_STACKBLOCKS);
+    pmm_free((uintptr_t)(zombie->platformdata.pstack - PROC_STACKSIZE), PROC_STACKBLOCKS);
+    
+    VasRange *vas, *vastmp;
+    LL_FOREACH_SAFE(zombie->vas, vas, vastmp) {
+      hal_vmm_unmap_range(zombie->platformdata.cr3, vas->virtstart, vas->physstart, vas->size);
+      pmm_free((uintptr_t)vas->physstart, vas->size / HAL_PAGE_SIZE);
+      dlfree(vas);
+    }
+
+    pmm_free((uintptr_t)zombie->platformdata.cr3, 1);
+
+    ProcArg *arg, *argtmp;
+    LL_FOREACH_SAFE(zombie->procargs.list, arg, argtmp) {
+      dlfree(arg->string);
+      dlfree(arg);
+    }
+    dlfree(zombie);
+  }
+  spinlock_release(&PROCS.spinlock);
+}
+
+void proc_sched(void *cpustate) {
+  hal_intr_disable();
+  sched_ticks++;
+
+  IntrStackFrame *frame = cpustate;
+
+  PROCS.current->platformdata.trapframe = *frame;
+  
+  PROCS.current = proc_nextready();
+  
+  if (sched_ticks % PROC_REAPER_FREQ == 0) {
+    proc_reaper();
+  }
+
+  tss.rsp0 = (uint64_t)VIRT(PROCS.current->platformdata.kstack);
+  hal_switchproc(&PROCS.current->platformdata.trapframe, (void *)PROCS.current->platformdata.cr3);
+}
+
+void proc_kill(Proc *proc) {
+  proc->state = PROC_ZOMBIE;
+}
+
+void proc_killself(void) {
+  spinlock_acquire(&PROCS.spinlock);
+  Proc *proc = PROCS.current;
+  proc_kill(proc);
+  spinlock_release(&PROCS.spinlock);
+}
+
+void proc_init(void) {
+  spinlock_init(&PROCS.spinlock);
+  PROCS.procs = NULL;
+
+  Proc *init = proc_spawnuser("base", "/bin/init");
+  PROCS.current = init;
+  proc_register(init);
+  init->state = PROC_READY;
+
+  tss.rsp0 = (uint64_t)VIRT(PROCS.current->platformdata.kstack);
+  hal_switchproc(&PROCS.current->platformdata.trapframe, (void *)PROCS.current->platformdata.cr3);
+}

kernel/proc/proc.h

@@ -0,0 +1,103 @@
+#ifndef PROC_PROC_H_
+#define PROC_PROC_H_
+
+#include <stdint.h>
+#include "hal/hal.h"
+#include "spinlock/spinlock.h"
+#include "bitmap/bitmap.h"
+#include "vfs/vfs.h"
+#include "ipc/pipe/pipe.h"
+#include "sysdefs/processctl.h"
+#include "dev/dev.h"
+
+#define PROC_NAME_MAX 0x100
+
+#define PROC_STACKBLOCKS (1024*2)
+#define PROC_STACKSIZE (PROC_STACKBLOCKS * BITMAP_BLOCK_SIZE)
+
+#define PROC_MAX 0x100 // max amount of processes
+
+#define PROC_VFSHANDLES_MAX   0x80
+#define PROC_PIPEHANDLES_MAX  0x20
+#define PROC_DEVHANDLES_MAX   0x20
+
+#define PROC_MMAN_MAP_BASE  0x0000100000000000ULL
+#define PROC_USER_STACK_TOP 0x00007FFFFFFFF000ULL
+
+typedef struct {
+  IntrStackFrame trapframe;
+  uint8_t *kstack;
+  uint8_t *pstack;
+  uint64_t cr3;
+} ProcPlatformData;
+
+enum {
+  PROC_EMBRYO = 0,
+  PROC_READY = 1,
+  PROC_ZOMBIE = 2,
+  PROC_WAITING = 3,
+  PROC_DIED = 4,
+};
+
+typedef struct ProcArg {
+  struct ProcArg *next;
+  char string[PROC_ARG_MAX];
+} ProcArg;
+
+typedef struct Proc {
+  struct Proc *next;
+
+  uint64_t pid;
+  char name[PROC_NAME_MAX];
+
+  ProcPlatformData platformdata;
+  uint8_t state;
+  VasRange *vas;
+
+  VfsObj *vobjs[PROC_VFSHANDLES_MAX];
+  uint64_t vobjcnt;
+
+  IpcPipe *pipes[PROC_PIPEHANDLES_MAX];
+  SpinLock pipes_spinlock;
+
+  Dev *devs[PROC_DEVHANDLES_MAX];
+  SpinLock devs_spinlock;
+
+  struct {
+    ProcArg *list;
+    size_t len;
+  } procargs;
+
+  uint64_t mman_map_base;
+} Proc;
+
+typedef struct {
+  SpinLock spinlock;
+  Proc *procs;
+  Proc *current;
+} Procs;
+
+extern Procs PROCS;
+
+void proc_init(void);
+void proc_register(Proc *proc);
+Proc *proc_spawnuser(char *mountpoint, char *path);
+void proc_sched(void *cpustate);
+void proc_killself(void);
+void proc_kill(Proc *proc);
+
+#define PROC_DIE() \
+  do { \
+    proc_killself(); \
+    for(;;); \
+  } while(0)
+
+
+#define PROC_ARG(proc, str) \
+  do { \
+    ProcArg *__arg = dlmalloc(sizeof(*__arg)); \
+    hal_strcpy(__arg->string, (str)); \
+    LL_APPEND((proc)->procargs.list, __arg); \
+    (proc)->procargs.len++; \
+  } while(0)
+#endif // PROC_PROC_H_

kernel/rbuf/rbuf.c

@@ -0,0 +1,34 @@
+#include <stdint.h>
+#include <stddef.h>
+#include <stdbool.h>
+#include "rbuf.h"
+#include "kprintf.h"
+#include "hal/hal.h"
+
+void rbuf_init(RBuf *rbuf, uint8_t *buf, size_t bufsize) {
+  rbuf->buffer = buf;
+  rbuf->tail = 0;
+  rbuf->head = 0;
+  rbuf->cap = bufsize;
+  rbuf->count = 0;
+}
+
+int32_t rbuf_push(RBuf *rbuf, uint8_t data) {
+  if (rbuf->count == rbuf->cap) {
+    return -1;
+  }
+  rbuf->buffer[rbuf->head] = data;
+  rbuf->head = (rbuf->head + 1) % rbuf->cap;
+  rbuf->count++;
+  return 0;
+}
+
+int32_t rbuf_pop(RBuf *rbuf, uint8_t *data) {
+  if (rbuf->count == 0) {
+    return -1;
+  }
+  *data = rbuf->buffer[rbuf->tail];
+  rbuf->tail = (rbuf->tail + 1) % rbuf->cap;
+  rbuf->count--;
+  return 0;
+}

kernel/rbuf/rbuf.h

@@ -0,0 +1,21 @@
+#ifndef RBUF_RBUF_H_
+#define RBUF_RBUF_H_
+
+#include <stdint.h>
+#include <stddef.h>
+#include <stdbool.h>
+
+typedef struct {
+  uint8_t *buffer;
+  size_t tail;
+  size_t head;
+  size_t cap;
+  size_t count;
+  bool full;
+} RBuf;
+
+int32_t rbuf_push(RBuf *rbuf, uint8_t data);
+int32_t rbuf_pop(RBuf *rbuf, uint8_t *data);
+void rbuf_init(RBuf *rbuf, uint8_t *buf, size_t bufsize);
+
+#endif // RBUF_RBUF_H_

kernel/spinlock/spinlock.c

@@ -1,20 +1,75 @@
 #include <stdatomic.h>
 #include <stdint.h>
+#include <stdbool.h>
 #include "spinlock.h"
+#include "hal/hal.h"
+#include "kprintf.h"
+
+#define SPINLOCK_IRQ_DBG 1
+
+#define SPINLOCK_HINT() asm volatile("pause")
+
+struct {
+  atomic_uint64_t irq_flags;
+  atomic_int irq_nest;
+} IRQ_CTX;
 
 void spinlock_init(SpinLock *sl) {
   atomic_store(&sl->lock, false);
 }
 
+uint64_t irqsave(void) {
+  uint64_t flags;
+  asm volatile("pushfq; cli; popq %0" : "=r"(flags) :: "memory", "cc");
+  return flags;
+}
+
+void irqrestore(uint64_t flags) {
+  if (flags & (1<<9)) {
+    asm volatile("sti" ::: "memory", "cc");
+  }
+}
+
+void irqsave_nested(void) {
+  if (atomic_load(&IRQ_CTX.irq_nest) == 0) {
+    atomic_store(&IRQ_CTX.irq_flags, irqsave());
+  }
+  atomic_inc(&IRQ_CTX.irq_nest);
+
+  #if SPINLOCK_IRQ_DBG
+    if (atomic_load(&IRQ_CTX.irq_nest) < 0) {
+      kprintf("IRQ_CTX.irq_nest underflow\n");
+      hal_hang();
+    }
+  #endif
+}
+
+void irqrestore_nested(void) {
+  #if SPINLOCK_IRQ_DBG
+    int irq_nest = atomic_load(&IRQ_CTX.irq_nest);
+    if (irq_nest <= 0) {
+      kprintf("spinlock: irqs restored too many times: %d\n", irq_nest);
+      hal_hang();
+    }
+  #endif
+
+  atomic_dec(&IRQ_CTX.irq_nest);
+  if (atomic_load(&IRQ_CTX.irq_nest) == 0) {
+    irqrestore(atomic_load(&IRQ_CTX.irq_flags));
+  }
+}
+
 void spinlock_acquire(SpinLock *sl) {
-  bool unlocked = false;
-  while (!atomic_compare_exchange_weak(&sl->lock, &unlocked, true)) {
-    unlocked = false;
+  irqsave_nested();
+
+  while (atomic_test_and_set_explicit(&sl->lock, memory_order_acquire)) {
     SPINLOCK_HINT();
   }
 }
 
 void spinlock_release(SpinLock *sl) {
-  atomic_store(&sl->lock, false);
+  atomic_clear_flag_explicit(&sl->lock, memory_order_release);
+
+  irqrestore_nested();
 }
 

kernel/spinlock/spinlock.h

@@ -3,16 +3,10 @@
 
 #include <stdatomic.h>
 #include <stdint.h>
-#include "hal/hal.h"
 
-typedef struct { atomic_bool lock; } SpinLock;
-
-// Spin more efficiently - cpu dependant
-#if defined(__x86_64__)
-# define SPINLOCK_HINT() asm volatile("pause")
-#else
-# define SPINLOCK_HINT()
-#endif
+typedef struct {
+  atomic_bool lock;
+} SpinLock;
 
 void spinlock_init(SpinLock *sl);
 void spinlock_acquire(SpinLock *sl);

kernel/std/include/stdatomic.h

@@ -1,22 +0,0 @@
-#ifndef __FREESTND_C_HDRS_STDATOMIC_H
-#define __FREESTND_C_HDRS_STDATOMIC_H
-
-#define memory_order_relaxed __ATOMIC_RELAXED
-#define memory_order_consume __ATOMIC_CONSUME
-#define memory_order_acquire __ATOMIC_ACQUIRE
-#define memory_order_release __ATOMIC_RELEASE
-#define memory_order_acq_rel __ATOMIC_ACQ_REL
-#define memory_order_seq_cst __ATOMIC_SEQ_CST
-
-#define atomic_load_explicit __atomic_load_n
-#define atomic_store_explicit __atomic_store_n
-
-#define atomic_store(p, v) atomic_store_explicit(p, v, memory_order_relaxed)
-#define atomic_load(p, v) atomic_load_explicit(p, v, memory_order_relaxed)
-
-#define atomic_compare_exchange_weak(p, old, new) \
-  __atomic_compare_exchange_n(p, old, new, true, memory_order_relaxed, memory_order_relaxed)
-
-#define atomic_bool volatile bool
-
-#endif

kernel/storedev/storedev.h

@@ -5,12 +5,13 @@
 #include <stddef.h>
 #include "spinlock/spinlock.h"
 #include "ramsd.h"
+#include "compiler/attr.h"
 
 enum {
   STOREDEV_RAMSD,
 };
 
-static const char *storedev_strings[] = {
+UNUSED static const char *storedev_strings[] = {
   "RAMSD",
 };
 

kernel/syscall/devctl.c

@@ -0,0 +1,79 @@
+#include <stdint.h>
+#include <stddef.h>
+#include "kprintf.h"
+#include "syscall.h"
+#include "errors.h"
+#include "spinlock/spinlock.h"
+#include "proc/proc.h"
+#include "sysdefs/devctl.h"
+#include "util/util.h"
+#include "hshtb.h"
+#include "dev/dev.h"
+
+int32_t SYSCALL5(sys_devctl, devh1, cmd1, buffer1, len1, extra1) {
+  uint64_t *devh = (uint64_t *)devh1;
+  uint64_t cmd = cmd1;
+  int32_t ret = E_OK;
+
+  spinlock_acquire(&PROCS.spinlock);
+  Proc *proc = PROCS.current;
+  spinlock_release(&PROCS.spinlock);
+
+  switch (cmd) {
+    case DEVCTL_GET_HANDLE: {
+      char *ident = (char *)buffer1;
+      if (ident == NULL) {
+        ret = E_INVALIDARGUMENT;
+        goto done;
+      }
+
+      spinlock_acquire(&DEVTABLE.spinlock);
+      Dev *founddev;
+      HSHTB_GET(DEVTABLE.devs, ident, ident, founddev);
+      spinlock_release(&DEVTABLE.spinlock);
+
+      if (founddev == NULL) {
+        ret = E_NOENTRY;
+        goto done;
+      }
+
+      bool found = false;
+      for (size_t i = 0; i < PROC_DEVHANDLES_MAX; i++) {
+        if (proc->devs[i] == NULL) {
+          found = true;
+          proc->devs[i] = founddev;
+          *devh = i;
+          break;
+        }
+      }
+
+      if (!found) {
+        ret = E_NOMEMORY;
+        goto done;
+      }
+    } break;
+    default: {
+      if (devh == NULL) {
+        ret = E_INVALIDARGUMENT;
+        goto done;
+      }
+
+      if (cmd >= DEV_FNS_MAX) {
+        ret = E_INVALIDARGUMENT;
+        goto done;
+      }
+
+      Dev *dev = proc->devs[*devh];
+      if (dev == NULL) {
+        ret = E_NOENTRY;
+        goto done;
+      }
+      spinlock_acquire(&dev->spinlock);
+      ret = dev->fns[cmd]((uint8_t *)buffer1, (size_t)len1, (void *)extra1);
+      spinlock_release(&dev->spinlock);
+    } break;
+  }
+
+done:
+  return ret;
+}

kernel/syscall/devctl.h

@@ -0,0 +1,10 @@
+#ifndef SYSCALL_DEVCTL_H_
+#define SYSCALL_DEVCTL_H_
+
+#include <stdint.h>
+#include "syscall.h"
+#include "dev/dev.h"
+
+int32_t SYSCALL5(sys_devctl, devh1, cmd1, buffer1, len1, extra1);
+
+#endif // SYSCALL_DEVCTL_H_

kernel/syscall/ioctl.c

@@ -0,0 +1,205 @@
+#include <stdint.h>
+#include <stddef.h>
+#include "syscall.h"
+#include "sysdefs/ioctl.h"
+#include "errors.h"
+#include "path/path.h"
+#include "vfs/vfs.h"
+#include "kprintf.h"
+#include "proc/proc.h"
+#include "spinlock/spinlock.h"
+
+#define IOCTL_MP_MAX 0xff
+#define IOCTL_PATH_MAX VFS_PATH_MAX
+
+int32_t SYSCALL5(sys_ioctl, ioh1, cmd1, arg1, arg2, arg3) {
+  uint64_t ioh = ioh1;
+  uint64_t cmd = cmd1;
+  int32_t ret = E_BADIO;
+
+  switch (cmd) {
+    case IOCTL_OPENF: {
+      const char *opath = (const char *)arg1;
+      uint64_t oflags = arg2;
+      
+      if (opath == NULL) {
+        ret = E_INVALIDARGUMENT;
+        goto done;
+      }
+
+      char mp[IOCTL_MP_MAX];
+      char path[IOCTL_PATH_MAX];
+
+      path_parse(opath, mp, path);
+
+      VfsObj *vobj = vfs_open(mp, path, oflags);
+      if (vobj == NULL) {
+        ret = E_NOENTRY;
+        goto done;
+      }
+
+      spinlock_acquire(&PROCS.spinlock);
+      Proc *proc = PROCS.current;
+      spinlock_release(&PROCS.spinlock);
+
+      if (proc->vobjcnt < PROC_VFSHANDLES_MAX) {
+        proc->vobjs[proc->vobjcnt++] = vobj;
+        ret = proc->vobjcnt - 1;
+      } else {
+        ret = E_NOMEMORY;
+      }
+    } break;
+    case IOCTL_CLOSEF: {
+      if (ioh >= PROC_VFSHANDLES_MAX) {
+        ret = E_INVALIDARGUMENT;
+        goto done;
+      }
+
+      spinlock_acquire(&PROCS.spinlock);
+      Proc *proc = PROCS.current;
+      spinlock_release(&PROCS.spinlock);
+
+      VfsObj *vobj = proc->vobjs[ioh];
+
+      if (vobj == NULL) {
+        ret = E_INVALIDARGUMENT;
+        goto done;
+      }
+
+      size_t i = 0;
+      for (; i < PROC_VFSHANDLES_MAX; i++) {
+        if (proc->vobjs[i] == vobj) {
+          break;
+        }
+      }
+
+      vfs_close(vobj);
+      proc->vobjs[i] = NULL;
+      ret = E_OK;
+    } break;
+    case IOCTL_WRITE: {
+      const uint8_t *const buffer = (const uint8_t *const)arg1;
+      size_t len = (size_t)arg2;
+      size_t off = (size_t)arg3;
+
+      if (buffer == NULL) {
+        ret = E_INVALIDARGUMENT;
+        goto done;
+      }
+
+      if (ioh >= PROC_VFSHANDLES_MAX) {
+        ret = E_INVALIDARGUMENT;
+        goto done;
+      }
+
+      spinlock_acquire(&PROCS.spinlock);
+      Proc *proc = PROCS.current;
+      spinlock_release(&PROCS.spinlock);
+      
+      VfsObj *vobj = proc->vobjs[ioh];
+
+      if (vobj == NULL) {
+        ret = E_INVALIDARGUMENT;
+        goto done;
+      }
+
+      ret = vobj->write(vobj, buffer, len, off);
+    } break;
+    case IOCTL_READ: {
+      uint8_t *const buffer = (uint8_t *const)arg1;
+      size_t len = (size_t)arg2;
+      size_t off = (size_t)arg3;
+
+      if (buffer == NULL) {
+        ret = E_INVALIDARGUMENT;
+        goto done;
+      }
+
+      if (ioh >= PROC_VFSHANDLES_MAX) {
+        ret = E_INVALIDARGUMENT;
+        goto done;
+      }
+
+      spinlock_acquire(&PROCS.spinlock);
+      Proc *proc = PROCS.current;
+      spinlock_release(&PROCS.spinlock);
+
+      VfsObj *vobj = proc->vobjs[ioh];
+
+      if (vobj == NULL) {
+        ret = E_INVALIDARGUMENT;
+        goto done;
+      }
+
+      ret = vobj->read(vobj, buffer, len, off);
+    } break;
+    case IOCTL_STAT: {
+      const char *opath = (const char *)arg2;
+      
+      if (opath == NULL) {
+        ret = E_INVALIDARGUMENT;
+        goto done;
+      }
+      
+      IoctlStat *iostat = (IoctlStat *)arg1;
+      if (iostat == NULL) {
+        ret = E_INVALIDARGUMENT;
+        goto done;
+      }
+
+      char mp[IOCTL_MP_MAX];
+      char path[IOCTL_PATH_MAX];
+
+      path_parse(opath, mp, path);
+
+      ret = vfs_stat(mp, path, iostat);
+    } break;
+    case IOCTL_FETCHDIRENT: {
+      const char *opath = (const char *)arg1;
+      
+      if (opath == NULL) {
+        ret = E_INVALIDARGUMENT;
+        goto done;
+      }
+
+      IoctlDirent *direntbuf = (IoctlDirent *)arg2;
+      if (direntbuf == NULL) {
+        ret = E_INVALIDARGUMENT;
+        goto done;
+      }
+
+      size_t idx = (size_t)arg3;
+      
+      char mp[IOCTL_MP_MAX];
+      char path[IOCTL_PATH_MAX];
+
+      path_parse(opath, mp, path);
+
+      ret = vfs_fetchdirent(mp, path, direntbuf, idx);
+    } break;
+    case IOCTL_MKDIR: {
+      const char *opath = (const char *)arg1;
+      
+      if (opath == NULL) {
+        ret = E_INVALIDARGUMENT;
+        goto done;
+      }
+
+      size_t idx = (size_t)arg3;
+      
+      char mp[IOCTL_MP_MAX];
+      char path[IOCTL_PATH_MAX];
+
+      path_parse(opath, mp, path);
+
+      ret = vfs_mkdir(mp, path);
+    } break;
+    default: {
+      ret = E_INVALIDARGUMENT;
+      goto done;
+    } break;
+  }
+
+done:
+  return ret;
+}

kernel/syscall/ioctl.h

@@ -0,0 +1,9 @@
+#ifndef SYSCALL_IOCTL_H_
+#define SYSCALL_IOCTL_H_
+
+#include <stdint.h>
+#include "syscall.h"
+
+int32_t SYSCALL5(sys_ioctl, ioh1, cmd1, arg1, arg2, arg3);
+
+#endif // SYSCALL_IOCTL_H_

kernel/syscall/ipcpipe.c

@@ -0,0 +1,168 @@
+#include <stddef.h>
+#include <stdint.h>
+#include "ipcpipe.h"
+#include "ipc/pipe/pipe.h"
+#include "sysdefs/ipcpipe.h"
+#include "dlmalloc/malloc.h"
+#include "proc/proc.h"
+#include "spinlock/spinlock.h"
+#include "errors.h"
+#include "util/util.h"
+#include "kprintf.h"
+
+int32_t SYSCALL5(sys_ipcpipe, pid1, pipenum1, cmd1, buffer1, len1) {
+  uint64_t pid = pid1;
+  uint64_t pipenum = pipenum1;
+  uint64_t cmd = cmd1;
+  int32_t ret = E_OK;
+  
+  if (pid == -1) {
+    pid = PROCS.current->pid;
+  }
+
+  spinlock_acquire(&PROCS.spinlock);
+  Proc *proc = NULL;
+  LL_FINDPROP(PROCS.procs, proc, pid, pid);
+  spinlock_release(&PROCS.spinlock);
+
+  if (proc == NULL) {
+    ret = E_INVALIDARGUMENT;
+    goto done;
+  }
+
+  switch (cmd) {
+    case IPCPIPE_MAKE: {
+      if (pipenum >= PROC_PIPEHANDLES_MAX) {
+        ret = E_NOMEMORY;
+        goto done;
+      }
+
+      IpcPipe *pipe = dlmalloc(sizeof(*pipe));
+      if (pipe == NULL) {
+        ret = E_NOMEMORY;
+        goto done;
+      }
+
+      if ((ret = ipc_pipeinit(pipe, proc->pid)) < 0) {
+        ret = E_NOMEMORY;
+        goto done;
+      }
+
+      spinlock_acquire(&proc->pipes_spinlock);
+      if (proc->pipes[pipenum] != NULL) {
+        spinlock_release(&proc->pipes_spinlock);
+        ipc_pipefree(pipe);
+        dlfree(pipe);
+        ret = E_RESOURCEAVAIL;
+        goto done;
+      }
+      proc->pipes[pipenum] = pipe;
+      spinlock_release(&proc->pipes_spinlock);
+
+      ret = E_OK;
+    } break;
+    case IPCPIPE_DELETE: {
+      if (pipenum >= PROC_PIPEHANDLES_MAX) {
+        ret = E_NOMEMORY;
+        goto done;
+      }
+
+      spinlock_acquire(&proc->pipes_spinlock);
+      if (proc->pipes[pipenum] != NULL && proc->pid == proc->pipes[pipenum]->ownerpid) {
+        ipc_pipefree(proc->pipes[pipenum]);
+        dlfree(proc->pipes[pipenum]);
+      }
+      proc->pipes[pipenum] = NULL;
+      spinlock_release(&proc->pipes_spinlock);
+      ret = E_OK;
+    } break;
+    case IPCPIPE_WRITE: {
+      if (pipenum >= PROC_PIPEHANDLES_MAX) {
+        ret = E_INVALIDARGUMENT;
+        goto done;
+      }
+
+      const uint8_t *const buffer = (const uint8_t *const)buffer1;
+      if (buffer == NULL) {
+        ret = E_INVALIDARGUMENT;
+        goto done;
+      }
+
+      spinlock_acquire(&proc->pipes_spinlock);
+      IpcPipe *pipe = proc->pipes[pipenum];
+      spinlock_release(&proc->pipes_spinlock);
+
+      if (pipe == NULL) {
+        ret = E_INVALIDARGUMENT;
+        goto done;
+      }
+
+      ret = ipc_pipewrite(pipe, buffer, len1);
+    } break;
+    case IPCPIPE_READ: {
+      if (pipenum >= PROC_PIPEHANDLES_MAX) {
+        ret = E_INVALIDARGUMENT;
+        goto done;
+      }
+
+      uint8_t *const buffer = (uint8_t *const)buffer1;
+      if (buffer == NULL) {
+        ret = E_INVALIDARGUMENT;
+        goto done;
+      }
+
+      spinlock_acquire(&proc->pipes_spinlock);
+      IpcPipe *pipe = proc->pipes[pipenum];
+      spinlock_release(&proc->pipes_spinlock);
+      
+      if (pipe == NULL) {
+        ret = E_INVALIDARGUMENT;
+        goto done;
+      }
+
+      ret = ipc_piperead(pipe, buffer, len1);
+    } break;
+    case IPCPIPE_REPLACE: {
+      if (pipenum >= PROC_PIPEHANDLES_MAX) {
+        ret = E_NOMEMORY;
+        goto done;
+      }
+
+      uint64_t pid2 = buffer1;
+      uint64_t pipenum2 = len1;
+
+      spinlock_acquire(&PROCS.spinlock);
+      Proc *proc2 = NULL;
+      LL_FINDPROP(PROCS.procs, proc2, pid, pid2);
+      spinlock_release(&PROCS.spinlock);
+
+      if (proc2 == NULL) {
+        ret = E_INVALIDARGUMENT;
+        goto done;
+      }
+
+      if (pipenum2 >= PROC_PIPEHANDLES_MAX) {
+        ret = E_NOMEMORY;
+        goto done;
+      }
+      
+      spinlock_acquire(&proc2->pipes_spinlock);
+      spinlock_acquire(&proc->pipes_spinlock);
+
+      if (proc->pipes[pipenum] != NULL && proc->pid == proc->pipes[pipenum]->ownerpid) {
+        ipc_pipefree(proc->pipes[pipenum]);
+        dlfree(proc->pipes[pipenum]);
+      }
+      proc->pipes[pipenum] = proc2->pipes[pipenum2];
+
+      spinlock_release(&proc->pipes_spinlock);
+      spinlock_release(&proc2->pipes_spinlock);
+    } break;
+    default: {
+      ret = E_INVALIDARGUMENT;
+    } break;
+  }
+
+done:
+  return ret;
+}

kernel/syscall/ipcpipe.h

@@ -0,0 +1,8 @@
+#ifndef SYSCALL_IPCPIPE_H_
+#define SYSCALL_IPCPIPE_H_
+
+#include "syscall.h"
+
+int32_t SYSCALL5(sys_ipcpipe, pid1, pipenum1, cmd1, buffer1, len1);
+
+#endif // SYSCALL_IPCPIPE_H_