diff --git a/.gitignore b/.gitignore
index 5e81429..8225972 100644
--- a/.gitignore
+++ b/.gitignore
@@ -20,6 +20,7 @@ CNAME
 
 # Other stuff
 multiboot.pdf
+osk-graph.ps
 grub.log
 Makefile.out.2
 build/bin/s**
@@ -29,6 +30,7 @@ build/bin/s**
 *.ilk
 *.map
 *.exp
+*.expand
 
 # Precompiled Headers
 *.gch
diff --git a/Makefile b/Makefile
index 697dbd0..c17e1ad 100644
--- a/Makefile
+++ b/Makefile
@@ -41,7 +41,7 @@ LDFLAGS=-melf_x86_64
 COPTIM=-O2
 CWARNS=-Wall -Wextra -Wno-unused-parameter -Wno-implicit-fallthrough -Werror=implicit-function-declaration -Werror=return-type
 CINCLUDES=-Iinclude
-CFLAGS1=-nostdlib -ffreestanding -mcmodel=large -std=gnu11
+CFLAGS1=-nostdlib -ffreestanding -mcmodel=large -std=gnu11 -fstack-protector-all -fdump-rtl-expand
 CFLAGS2= -c -mno-red-zone -mno-mmx -mno-sse -mno-sse2
 CFLAGS= $(CFLAGS1) $(CFLAGS2)
 CFLAGS_MATHS= $(CFLAGS1) -c -mno-red-zone -mno-mmx -mno-sse2
@@ -55,10 +55,10 @@ CFLAGS += -g
 endif
 
 KCC=$(CCNAME) $(COPTIM) $(CWARNS) $(CFLAGS) $(CINCLUDES) \
- -D_OSK_SOURCE -D_KALEID_KERNEL -fstack-protector-all
+ -D_OSK_SOURCE -D_KALEID_KERNEL
 
 KCC_MATHS=$(CCNAME) $(COPTIM) $(CWARNS) $(CFLAGS_MATHS) $(CINCLUDES) \
- -D_OSK_SOURCE -D_KALEID_KERNEL -fstack-protector-all
+ -D_OSK_SOURCE -D_KALEID_KERNEL
 
 # Folders
 MBRDIR=boot/grub
@@ -84,8 +84,8 @@ NC='\033[1;37m'
 # Lib C sources + libbuf source
 LibCSources =	libc/mem.c libc/ctype.c                                        \
 		libc/rand.c libc/sprintf.c                                     \
-		libc/errno.c libc/string.c                                    \
-		libc/strtol.c extras/argv.c                                    \
+		libc/errno.c libc/string.c                                     \
+		libc/strtol.c                                                  \
 		libbuf/bopen.c libbuf/bputc.c libbuf/bscroll.c                 \
 		libbuf/bprint.c libbuf/bgetc.c libbuf/bscan.c                  \
 		libbuf/bflush.c libbuf/bwrite.c libbuf/bread.c                 \
@@ -108,7 +108,8 @@ KernSources =	kernel/ke/cpuid.c kernel/mm/paging.c                           \
 		kernel/ke/rtc.c kernel/io/keyb.c                               \
 		kernel/io/spkr.c kernel/po/shtdwn.c                            \
 		kernel/sh/shell.c kernel/sh/shcmds.c                           \
-		kernel/sh/musage.c kernel/io/ata.c
+		kernel/sh/musage.c kernel/io/ata.c                             \
+		kernel/sh/argv.c
 
 KernObj=$(patsubst %.c,$(KOBJDIR)/%.o,$(KernSources))
 KernDep=$(patsubst %.c,$(KOBJDIR)/%.d,$(KernSources))
@@ -259,10 +260,18 @@ copy_kernel:
 	@echo ${CL2}[$@] ${CL}Success.${CL3}
 	@rmdir $(BINDIR)/disk
 
+egypt: CFLAGS := -DNDEBUG $(filter-out -fstack-protector-all,$(CFLAGS))
+egypt: dust $(LibCObj) $(KernObj)
+	@find -name '*.expand' -o -name '*.expand' | xargs cat > rtl_exp.out
+	@egypt < rtl_exp.out | dot -Tps -o osk-graph.ps
+	@rm -f rtl_exp.out
+	@evince osk-graph.ps &
+
 dust:
 	-@$(MBRDIR)/umount.sh $(BINDIR)/disk || /bin/true
 	@rm -Rf $(OBJDIR)/*
 	@echo ${CL2}[$@] ${CL}Cleaned.${CL3}
+
 clean:
 	-@$(MBRDIR)/umount.sh $(BINDIR)/disk || /bin/true
 	@rm -Rvf ./ProjectTree $(BUILDDIR)/*.log
diff --git a/ProjectTree b/ProjectTree
index 82078fc..0f87887 100644
--- a/ProjectTree
+++ b/ProjectTree
@@ -56,102 +56,142 @@
 │   │   │   └── loader.o
 │   │   └── kaleid
 │   │       ├── extras
+│   │       │   ├── argv.c.229r.expand
 │   │       │   ├── argv.d
 │   │       │   └── argv.o
 │   │       ├── kernel
 │   │       │   ├── init
+│   │       │   │   ├── info.c.229r.expand
 │   │       │   │   ├── info.d
 │   │       │   │   ├── info.o
+│   │       │   │   ├── init.c.229r.expand
 │   │       │   │   ├── init.d
 │   │       │   │   ├── init.o
+│   │       │   │   ├── ssp.c.229r.expand
 │   │       │   │   ├── ssp.d
 │   │       │   │   ├── ssp.o
 │   │       │   │   ├── table.d
 │   │       │   │   └── table.o
 │   │       │   ├── io
+│   │       │   │   ├── ata.c.229r.expand
 │   │       │   │   ├── ata.d
 │   │       │   │   ├── ata.o
+│   │       │   │   ├── cursor.c.229r.expand
 │   │       │   │   ├── cursor.d
 │   │       │   │   ├── cursor.o
+│   │       │   │   ├── keyb.c.229r.expand
 │   │       │   │   ├── keyb.d
 │   │       │   │   ├── keyb.o
+│   │       │   │   ├── spkr.c.229r.expand
 │   │       │   │   ├── spkr.d
 │   │       │   │   ├── spkr.o
+│   │       │   │   ├── vga.c.229r.expand
 │   │       │   │   ├── vga.d
 │   │       │   │   └── vga.o
 │   │       │   ├── ke
+│   │       │   │   ├── cpuid.c.229r.expand
 │   │       │   │   ├── cpuid.d
 │   │       │   │   ├── cpuid.o
+│   │       │   │   ├── idt.c.229r.expand
 │   │       │   │   ├── idt.d
 │   │       │   │   ├── idt.o
+│   │       │   │   ├── log.c.229r.expand
 │   │       │   │   ├── log.d
 │   │       │   │   ├── log.o
+│   │       │   │   ├── panic.c.229r.expand
 │   │       │   │   ├── panic.d
 │   │       │   │   ├── panic.o
+│   │       │   │   ├── rtc.c.229r.expand
 │   │       │   │   ├── rtc.d
 │   │       │   │   └── rtc.o
 │   │       │   ├── mm
+│   │       │   │   ├── gdt.c.229r.expand
 │   │       │   │   ├── gdt.d
 │   │       │   │   ├── gdt.o
+│   │       │   │   ├── heap.c.229r.expand
 │   │       │   │   ├── heap.d
 │   │       │   │   ├── heap.o
+│   │       │   │   ├── malloc.c.229r.expand
 │   │       │   │   ├── malloc.d
 │   │       │   │   ├── malloc.o
+│   │       │   │   ├── map.c.229r.expand
 │   │       │   │   ├── map.d
 │   │       │   │   ├── map.o
+│   │       │   │   ├── paging.c.229r.expand
 │   │       │   │   ├── paging.d
 │   │       │   │   └── paging.o
 │   │       │   ├── po
+│   │       │   │   ├── shtdwn.c.229r.expand
 │   │       │   │   ├── shtdwn.d
 │   │       │   │   └── shtdwn.o
 │   │       │   ├── ps
 │   │       │   │   ├── sched.d
 │   │       │   │   └── sched.o
 │   │       │   └── sh
+│   │       │       ├── musage.c.229r.expand
 │   │       │       ├── musage.d
 │   │       │       ├── musage.o
+│   │       │       ├── shcmds.c.229r.expand
 │   │       │       ├── shcmds.d
 │   │       │       ├── shcmds.o
+│   │       │       ├── shell.c.229r.expand
 │   │       │       ├── shell.d
 │   │       │       └── shell.o
 │   │       ├── libbuf
+│   │       │   ├── bclose.c.229r.expand
 │   │       │   ├── bclose.d
 │   │       │   ├── bclose.o
+│   │       │   ├── bflush.c.229r.expand
 │   │       │   ├── bflush.d
 │   │       │   ├── bflush.o
+│   │       │   ├── bgetc.c.229r.expand
 │   │       │   ├── bgetc.d
 │   │       │   ├── bgetc.o
+│   │       │   ├── bmisc.c.229r.expand
 │   │       │   ├── bmisc.d
 │   │       │   ├── bmisc.o
+│   │       │   ├── bopen.c.229r.expand
 │   │       │   ├── bopen.d
 │   │       │   ├── bopen.o
+│   │       │   ├── bprint.c.229r.expand
 │   │       │   ├── bprint.d
 │   │       │   ├── bprint.o
+│   │       │   ├── bputc.c.229r.expand
 │   │       │   ├── bputc.d
 │   │       │   ├── bputc.o
 │   │       │   ├── bread.d
 │   │       │   ├── bread.o
 │   │       │   ├── bscan.d
 │   │       │   ├── bscan.o
+│   │       │   ├── bscroll.c.229r.expand
 │   │       │   ├── bscroll.d
 │   │       │   ├── bscroll.o
 │   │       │   ├── bwrite.d
 │   │       │   └── bwrite.o
 │   │       └── libc
+│   │           ├── atoi.c.229r.expand
 │   │           ├── atoi.o
+│   │           ├── ctype.c.229r.expand
 │   │           ├── ctype.d
 │   │           ├── ctype.o
+│   │           ├── errno.c.229r.expand
 │   │           ├── errno.d
 │   │           ├── errno.o
+│   │           ├── itoa.c.229r.expand
 │   │           ├── itoa.o
+│   │           ├── mem.c.229r.expand
 │   │           ├── mem.d
 │   │           ├── mem.o
+│   │           ├── rand.c.229r.expand
 │   │           ├── rand.d
 │   │           ├── rand.o
+│   │           ├── sprintf.c.229r.expand
 │   │           ├── sprintf.d
 │   │           ├── sprintf.o
+│   │           ├── string.c.229r.expand
 │   │           ├── string.d
 │   │           ├── string.o
+│   │           ├── strtol.c.229r.expand
 │   │           ├── strtol.d
 │   │           └── strtol.o
 │   ├── grub.log
@@ -184,6 +224,7 @@
 │   │   └── list.h
 │   ├── mm
 │   │   ├── heap.h
+│   │   ├── malloc.h
 │   │   └── mm.h
 │   ├── po
 │   │   └── shtdwn.h
@@ -261,7 +302,8 @@
 ├── ChangeLog
 ├── COPYING
 ├── Makefile
+├── osk-graph.ps
 ├── ProjectTree
 └── README.md
 
-43 directories, 196 files
+43 directories, 238 files
diff --git a/README.md b/README.md
index b815425..b6edeaa 100644
--- a/README.md
+++ b/README.md
@@ -22,7 +22,7 @@ To compile this project from sources, you must first install the dependencies
 
 ```
 apt update && apt upgrade
-apt install grub-pc-bin dosfstools make nasm qemu tree
+apt install grub-pc-bin dosfstools make nasm qemu tree libisl15
 ```
 
 You also need to have the [x86-64 ELF gcc cross-compiler](https://www.os-k.eu/build-tools/cross-cc.tar.xz) and its ``bin`` directory in your PATH.
diff --git a/include/ex/argv.h b/include/ex/argv.h
deleted file mode 100644
index a651f34..0000000
--- a/include/ex/argv.h
+++ /dev/null
@@ -1,299 +0,0 @@
-//----------------------------------------------------------------------------//
-//                           GNU GPL OS/K                                     //
-//                                                                            //
-//  Desc:       Command line parsing utilities                                //
-//                                                                            //
-//                                                                            //
-//  Copyright © 2018-2019 The OS/K Team                                       //
-//                                                                            //
-//  This file is part of OS/K.                                                //
-//                                                                            //
-//  OS/K is free software: you can redistribute it and/or modify              //
-//  it under the terms of the GNU General Public License as published by      //
-//  the Free Software Foundation, either version 3 of the License, or         //
-//  any later version.                                                        //
-//                                                                            //
-//  OS/K is distributed in the hope that it will be useful,                   //
-//  but WITHOUT ANY WARRANTY//without even the implied warranty of            //
-//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the             //
-//  GNU General Public License for more details.                              //
-//                                                                            //
-//  You should have received a copy of the GNU General Public License         //
-//  along with OS/K.  If not, see <https://www.gnu.org/licenses/>.            //
-//----------------------------------------------------------------------------//
-
-#ifndef _LIBC_H
-#include <libc.h>
-#endif
-
-#ifndef _KALEXTRAS_ARGV_H
-#define _KALEXTRAS_ARGV_H
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-typedef enum CmdOptionFlag_t            CmdOptionFlag_t;
-typedef enum CmdParserFlags_t           CmdParserFlags_t;
-typedef enum CmdParserReturn_t          CmdParserReturn_t;
-
-typedef struct CmdOption_t              CmdOption_t;
-typedef struct CmdDocStrings_t          CmdDocStrings_t;
-typedef struct CmdParserState_t         CmdParserState_t;
-
-//------------------------------------------//
-
-//
-// Maximal total size of argv, including the pointers,
-// the pointed-to strings and their null-terminators
-// This is a 32-bit integer
-//
-#define ARG_MAX (1 << 16) // 64 KB
-
-//------------------------------------------//
-
-//
-// Flags for options
-//
-enum CmdOptionFlag_t
-{
-    // The option parameter is optional
-    KALOPT_OPTIONAL = (1 << 0),
-
-    // Do not show option in any help message
-    KALOPT_HIDDEN   = (1 << 1),
-
-    // This option is an alias for the previous one
-    KALOPT_ALIAS    = (1 << 2),
-
-    // This isn't an option but a docstring
-    KALOPT_DOCSTR   = (1 << 3),
-
-    // Only show in long help messages
-    KALOPT_LONGDOC  = (1 << 4),
-
-};
-
-//
-// Flags for KalParse(CmdLine|ArgVec)
-//
-enum CmdParserFlags_t
-{
-    // Don't exit on errors
-    KALOPT_NO_EXIT = (1 << 0),
-
-    // Don't react to --help
-    KALOPT_NO_HELP = (1 << 1),
-
-    // Don't react to --version
-    KALOPT_NO_VERSION = (1 << 2),
-
-    // Alias -h for --help and -V for --version
-    KALOPT_ALIASES = (1 << 3),
-
-    // Don't print any error message
-    // Implies KALOPT_NO_EXIT
-    KALOPT_NO_ERRORS = (1 << 4) | KALOPT_NO_EXIT,
-
-    // Use KalGetProgName() instead of argv[0]
-    // as program name
-    KALOPT_DONT_USE_ARGV0 = (1 << 5),
-
-    // Call argument parser for non-options
-    // Non-options arguments will be indicated by
-    // a key of 0, the argument passed as a parameter
-    KALOPT_PARSE_ALL = (1 << 6),
-
-    // Call argument parser with options and non-options in the
-    // order they were found, instead of parsing options first
-    KALOPT_IN_ORDER = (1 << 7) | KALOPT_PARSE_ALL,
-
-    // Stay silent all along
-    KALOPT_SILENT = KALOPT_NO_EXIT | KALOPT_NO_ERRORS
-                  | KALOPT_NO_HELP | KALOPT_NO_VERSION,
-};
-
-//
-// Return values for the command parser
-// These flags can be combined and are applied in order
-//
-// "Continue" and "Break" actions do not prevent
-// later actions from applying
-//
-enum CmdParserReturn_t
-{
-    // Continue parsing new options
-    KALOPT_CONTINUE = 0,
-
-    // Stop parsing further options
-    KALOPT_BREAK    = (1 << 0),
-
-    // Show help/version message (by default, continue parsing)
-    KALOPT_SHOWHELP = (1 << 1),
-    KALOPT_SHOWVERS = (1 << 2),
-};
-
-//------------------------------------------//
-
-//
-// An option for a command, e.g. "-o file" in "cc -o file"
-//
-struct CmdOption_t
-{
-    // The option's name, e.g. "help" for "--help"
-    // May be 0, but only if letter is not zero
-    const char         *longName;
-
-    // The option's letter, e.g. 'h' for '-h'
-    int                 letter;
-
-    // Address of the variable to put the parameter into
-    const char         *param;
-
-    // Option flags, see above
-    CmdOptionFlag_t     flags;
-
-    // The option's help text
-    // If this is 0, this option is hidden
-    const char         *helpText;
-
-    // The option's group, for sorting during --help
-    // Must be positive and < 256, or option won't shop up
-    // during help texts
-    int                 group;
-};
-
-//
-// Program help/documentation strings; any can be 0
-//
-// Help messages are printed in this format:
-// (letting "this" be a CmdDocStrings_t* variable)
-//
-// Usage: (this->usage)
-// (this->header)
-//
-// (this->groups[0])
-//      -o, --option-name       option description
-//      ...
-// ...
-//
-// (this->bottom)
-//
-// XXX progname/version
-//
-struct CmdDocStrings_t
-{
-    const char  *usage;
-    const char  *header;
-    const char  *bottom;
-
-    // Groups documentation
-    // groups[n] should be either 0 or contain the
-    // description of the option group n
-    const char **groups;
-};
-
-//
-// The state variable passed to the parser containing useful infos
-//
-struct CmdParserState_t {
-
-    // Option we're currently parsing
-    const CmdOption_t  *option;
-
-    // Index (in argv) of the option we're parsing
-    int                 argvIndex;
-
-    // Flags passed to KalParse(CmdLine|ArgV)
-    CmdParserFlags_t    flags;
-
-    // Has help/version messages been displayed already?
-    bool                shownHelp;
-    bool                shownVersion;
-
-    // Output streams (may be NULL)
-    /*FILE*/ void      *outStream;
-    /*FILE*/ void      *errStream;
-
-    // Private, internal data; do not touch
-    void               *priv;
-
-};
-
-//
-// The argument parser function
-//
-typedef CmdParserReturn_t (*CmdParser_t)(int                key,
-                                         const char        *param,
-                                         CmdParserState_t  *state);
-
-//------------------------------------------//
-
-//
-// Misc. simple functions
-//
-int KalComputeArgCount(const char **argv);
-size_t KalComputeArgVecSize(const char **argv);
-
-//
-// Command line to argument vector
-//
-error_t KalCmdLineToArgVecEx(const char  *cmdLine,
-                             int         *argcPtr,
-                             char        *bufptr,
-                             bool         doEscaping);
-
-//
-// KalCmdLineToArgVecEx but doEscaping = false
-//
-error_t KalCmdLineToArgVec(const char  *cmdLine,
-                           int         *argcPtr,
-                           char        *bufptr);
-
-//
-// Argument vector to command line
-//
-error_t KalArgVecToCmdLineEx(char        *cmdLine,
-                             size_t       lengthMax,
-                             int          argc,
-                             const char **argv,
-                             bool         doUnEscaping);
-
-//
-// KalArgVecToCmdLineEx but doUnEscapign = false
-//
-error_t KalArgVecToCmdLine(char        *cmdLine,
-                           size_t       lengthMax,
-                           int          argc,
-                           const char **argv);
-//
-// Command line parser; only takes an argument vector
-// The argv argument *will* be modified and all parsed
-// options and arguments will be removed, except argv[0]
-// which is guanranteed to be left
-//
-error_t KalParseArgVecEx(int                     argc,
-                         char                  **argv,
-                         const CmdOption_t      *options,
-                         const CmdDocStrings_t  *docStrings,
-                         CmdParserFlags_t       *flags,
-                         CmdParser_t            *parser,
-                         /*FILE*/ void          *outStream,
-                         /*FILE*/ void          *errStream);
-//
-// KalParseArgVecEx(argc, argv, options, docString, stdin, stdout, parser, NULL)
-//
-error_t KalParseArgVec(int                     argc,
-                       char                  **argv,
-                       const CmdOption_t      *options,
-                       const CmdDocStrings_t  *docStrings,
-                       CmdParserFlags_t       *flags,
-                       CmdParser_t            *parser);
-
-//------------------------------------------//
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif
diff --git a/include/init/boot.h b/include/init/boot.h
index 931f996..61cfa19 100644
--- a/include/init/boot.h
+++ b/include/init/boot.h
@@ -26,6 +26,10 @@
 #include <kernel.h>
 #endif
 
+#ifndef MULTIBOOT_HEADER
+#include <init/mboot.h>
+#endif
+
 #ifndef _INIT_BOOT_H
 #define _INIT_BOOT_H
 
@@ -115,4 +119,9 @@ extern volatile BootInfo_t       BtBootTab;
 
 //----------------------------------------------------------------------------//
 
+void BtDoSanityChecks(uint);
+void BtInitBootInfo(multiboot_info_t *, void *);
+
+//----------------------------------------------------------------------------//
+
 #endif
diff --git a/include/io/vga.h b/include/io/vga.h
index 7d183dd..319c790 100644
--- a/include/io/vga.h
+++ b/include/io/vga.h
@@ -58,15 +58,14 @@ extern const char *RtlColorNames[VGA_COLOR_WHITE+1];
 #define RtlColorToChar(c) ((c) + 130)
 #define RtlCharToColor(c) ((c) - 130)
 
-void IoScrollDown(void);
+uint IoGetScroll(void);
 void IoScrollUp(void);
+void IoScrollDown(void);
 
 void IoChangeTermColor(int, int);
 
 error_t IoInitVGABuffer(void);
 
-uint IoGetScroll(void);
-
 //----------------------------------------------------------------------------//
 
 #endif
diff --git a/include/ke/cpuid.h b/include/ke/cpuid.h
index f10e53d..aa49f38 100644
--- a/include/ke/cpuid.h
+++ b/include/ke/cpuid.h
@@ -115,7 +115,7 @@ static inline int CpuCpuidString(int code, uint where[4])
 
 void KeGetCpuInfos(void);
 double KeGetCpuSpeed(void);
-extern void KeActivateSSE(void);
+void KeActivateSSE(void);
 
 // -------------------------------------------------------------------------- //
 
diff --git a/include/kernel.h b/include/kernel.h
index 9392824..c043910 100644
--- a/include/kernel.h
+++ b/include/kernel.h
@@ -165,7 +165,9 @@ extern CpuCore_t              _KeCPUTable[NCPUS];
 
 //----------------------------------------------------------------------------//
 
+#ifndef _ASM_H
 #include <asm.h>
+#endif
 
 //----------------------------------------------------------------------------//
 
@@ -186,7 +188,7 @@ extern CpuCore_t              _KeCPUTable[NCPUS];
 
 error_t KernLog(const char *, ...);
 
-#ifndef _NO_DEBUG
+#ifndef NDEBUG
 void DebugLog(const char *, ...);
 #else
 #define DebugLog(fmt, ...) ((void)0)
diff --git a/include/lib/list.h b/include/lib/list.h
index a3eb619..95042a4 100644
--- a/include/lib/list.h
+++ b/include/lib/list.h
@@ -47,7 +47,6 @@ struct ListHead_t
 
 struct ListNode_t
 {
-    void               *data;
     ListHead_t         *head;
     ListNode_t         *prev;
     ListNode_t         *next;
@@ -71,22 +70,6 @@ static inline ListHead_t
     return head;
 }
 
-// Create a node
-//
-static inline ListNode_t
-*ExCreateNode(void *data)
-{
-    ListNode_t *node = malloc(sizeof(ListNode_t));
-
-    if (node == NULL) return NULL;
-
-    node->data = data;
-    node->head = NULL;
-    node->prev = node->next = NULL;
-
-    return node;
-}
-
 //
 // Prepend node at beginning of list
 //
@@ -228,16 +211,6 @@ leave:
     return head;
 }
 
-//
-// Free a node
-//
-static inline void
-ExDestroyNode(ListNode_t *node)
-{
-    assert(node);
-    free(node);
-}
-
 //
 // Free a list head
 //
@@ -248,11 +221,6 @@ ExDestroyListHead(ListHead_t *head)
     free(head);
 }
 
-//
-//  Access a node's data
-//
-#define ExGetNodeData(node, type) ((type)(node)->data)
-
 //------------------------------------------//
 
 #ifdef __cplusplus
diff --git a/include/mm/malloc.h b/include/mm/malloc.h
new file mode 100644
index 0000000..44531ad
--- /dev/null
+++ b/include/mm/malloc.h
@@ -0,0 +1,102 @@
+//----------------------------------------------------------------------------//
+//                           GNU GPL OS/K                                     //
+//                                                                            //
+//  Desc:       Memory allocation functions                                   //
+//                                                                            //
+//                                                                            //
+//  Copyright © 2018-2019 The OS/K Team                                       //
+//                                                                            //
+//  This file is part of OS/K.                                                //
+//                                                                            //
+//  OS/K is free software: you can redistribute it and/or modify              //
+//  it under the terms of the GNU General Public License as published by      //
+//  the Free Software Foundation, either version 3 of the License, or         //
+//  any later version.                                                        //
+//                                                                            //
+//  OS/K is distributed in the hope that it will be useful,                   //
+//  but WITHOUT ANY WARRANTY//without even the implied warranty of            //
+//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the             //
+//  GNU General Public License for more details.                              //
+//                                                                            //
+//  You should have received a copy of the GNU General Public License         //
+//  along with OS/K.  If not, see <https://www.gnu.org/licenses/>.            //
+//----------------------------------------------------------------------------//
+
+#ifndef _KERNEL_H
+#include <kernel.h>
+#endif
+
+#ifndef _LIB_LIST_H
+#include <lib/list.h>
+#endif
+
+#ifndef _MM_MALLOC_H
+#define _MM_MALLOC_H
+
+#ifndef PAGESIZE
+#define PAGESIZE 4096
+#endif
+
+typedef struct Cache_t          Cache_t;
+typedef struct Pool_t           Pool_t;
+
+// Operation on objects
+typedef void    (*ObjCtor_t)(Cache_t *cache,
+                             Pool_t *pool,
+                             void *obj);
+//
+// A cache containing many pools
+//
+struct Cache_t
+{
+    // Synchronization
+    Spinlock_t      lock;
+
+    // Cache name
+    char            name[64];
+    
+    // Size of each object
+    size_t          objsize;
+    
+    // Number of objects allocated
+    size_t          objused;
+    
+    // Number of available objects including unused
+    size_t          objtotal;
+    
+    // Number of objects per pool
+    size_t          objperpool;
+
+    // Object constructor
+    ObjOper_t      *ctor;
+    
+    // Object destructor
+    ObjOper_t      *dtor;
+
+    // Object pools without any allocated object
+    ListHead_t     *freepools;
+    
+    // Object pools containing some allocated objects
+    ListHead_t     *usedpools;
+    
+    // Objects pools containing no unallocated object
+    ListHead_t     *fullpools;
+};
+
+//
+// A pool of allocable objects
+// Takes a fixed amount of pages
+//
+struct Pool_t
+{
+
+};
+
+//
+// Allocates memory from the kernel heap
+//
+void *kmalloc(size_t req, uint flags);
+void *kmemalign(size_t req, uint align, uint flags);
+
+#endif
+
diff --git a/include/sh/argv.h b/include/sh/argv.h
new file mode 100644
index 0000000..843b2c7
--- /dev/null
+++ b/include/sh/argv.h
@@ -0,0 +1,57 @@
+//----------------------------------------------------------------------------//
+//                           GNU GPL OS/K                                     //
+//                                                                            //
+//  Desc:       Command line parsing utilities                                //
+//                                                                            //
+//                                                                            //
+//  Copyright © 2018-2019 The OS/K Team                                       //
+//                                                                            //
+//  This file is part of OS/K.                                                //
+//                                                                            //
+//  OS/K is free software: you can redistribute it and/or modify              //
+//  it under the terms of the GNU General Public License as published by      //
+//  the Free Software Foundation, either version 3 of the License, or         //
+//  any later version.                                                        //
+//                                                                            //
+//  OS/K is distributed in the hope that it will be useful,                   //
+//  but WITHOUT ANY WARRANTY//without even the implied warranty of            //
+//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the             //
+//  GNU General Public License for more details.                              //
+//                                                                            //
+//  You should have received a copy of the GNU General Public License         //
+//  along with OS/K.  If not, see <https://www.gnu.org/licenses/>.            //
+//----------------------------------------------------------------------------//
+
+#ifndef _KERNEL_H
+#include <kernel.h>
+#endif
+
+#ifndef _SH_ARGV_H
+#define _SH_ARGV_H
+
+//------------------------------------------//
+
+// See kaleid/sh/argv.h
+#define ARG_MAX (1 << 16) // 64 KB
+
+//------------------------------------------//
+
+//
+// Command line to argument vector
+// Assumes sizeof(bufptr) >= ARG_MAX * 2
+//
+error_t ShCmdLineToArgVecEx(const char  *cmdLine,
+                            int         *argcPtr,
+                            char        *bufptr,
+                            bool         doEscaping);
+
+//
+// ShCmdLineToArgVecEx but doEscaping = false
+//
+error_t ShCmdLineToArgVec(const char  *cmdLine,
+                          int         *argcPtr,
+                          char        *bufptr);
+
+//------------------------------------------//
+
+#endif
diff --git a/kaleid/kernel/init/init.h b/include/sh/shell.h
similarity index 69%
rename from kaleid/kernel/init/init.h
rename to include/sh/shell.h
index 4f9accf..f3da477 100644
--- a/kaleid/kernel/init/init.h
+++ b/include/sh/shell.h
@@ -1,7 +1,7 @@
 //----------------------------------------------------------------------------//
 //                           GNU GPL OS/K                                     //
 //                                                                            //
-//  Desc:       Kernel entry point                                            //
+//  Desc:       Kernel shell                                                  //
 //                                                                            //
 //                                                                            //
 //  Copyright © 2018-2019 The OS/K Team                                       //
@@ -22,33 +22,38 @@
 //  along with OS/K.  If not, see <https://www.gnu.org/licenses/>.            //
 //----------------------------------------------------------------------------//
 
-#include <init/mboot.h>
-#include <lib/buf.h>
-#include <ke/time.h>
-#include <ke/idt.h>
-#include <io/spkr.h>
-#include <io/keyb.h>
-#include <io/cursor.h>
-#include <po/shtdwn.h>
-#include <mm/heap.h>
-#include <mm/mm.h>
-#include <io/vga.h>
-#include <ke/cpuid.h>
-#include <io/ata.h>
+#ifndef _KERNEL_H
+#include <kernel.h>
+#endif
 
-// info.c
-extern void BtDoSanityChecks(uint mbMagic);
-extern void BtInitBootInfo(multiboot_info_t *mbi, void *codeSeg);
+#ifndef _SH_SHELL_H
+#define _SH_SHELL_H
 
-// io/vga.c
-extern error_t IoInitVGABuffer(void);
+//----------------------------------------------------------------------------//
 
-// ke/shell.c
-extern void KeStartShell(void);
+void ShStartShell(void);
 
-// ps/proc.c test function
-extern void pstest(void);
+//----------------------------------------------------------------------------//
 
-// interrupts tests
-extern void divideByZero(void);
+#define CMDBUFSIZE 256
+
+typedef struct Command_t Command_t;
+
+struct Command_t
+{
+    const char *name;
+    error_t (*func)(int argc, char **argv, char *cmdline);
+    const char *help;
+};
+
+//----------------------------------------------------------------------------//
+
+extern int shcol;
+extern int shargc;
+extern char **shargv;
+extern Command_t shcmdtable[];
+
+//----------------------------------------------------------------------------//
+
+#endif
 
diff --git a/kaleid/kernel/init/info.c b/kaleid/kernel/init/info.c
index 8f8d6ae..1d2da60 100644
--- a/kaleid/kernel/init/info.c
+++ b/kaleid/kernel/init/info.c
@@ -23,7 +23,6 @@
 //----------------------------------------------------------------------------//
 
 #include <init/boot.h>
-#include <init/mboot.h>
 
 //
 // BootInfo_t initialization. It is necessary because grub will potentially be
diff --git a/kaleid/kernel/init/init.c b/kaleid/kernel/init/init.c
index 217f6bf..e29259e 100644
--- a/kaleid/kernel/init/init.c
+++ b/kaleid/kernel/init/init.c
@@ -22,7 +22,17 @@
 //  along with OS/K.  If not, see <https://www.gnu.org/licenses/>.            //
 //----------------------------------------------------------------------------//
 
-#include "init.h"
+#include <mm/mm.h>
+#include <mm/heap.h>
+#include <ke/idt.h>
+#include <ke/time.h>
+#include <ke/cpuid.h>
+#include <sh/shell.h>
+#include <io/vga.h>
+#include <io/keyb.h>
+#include <io/cursor.h>
+#include <po/shtdwn.h>
+#include <init/boot.h>
 
 //
 // Entry point of the Kaleid kernel
@@ -66,7 +76,7 @@ noreturn void BtStartKern(multiboot_info_t *mbInfo, uint mbMagic, void *codeSeg)
     IoEnableKeyb();
     MmActivatePageHandler();
 
-    KeStartShell();
+    ShStartShell();
 
     PoShutdown();
 }
diff --git a/kaleid/kernel/ke/log.c b/kaleid/kernel/ke/log.c
index b160a47..0765e1f 100644
--- a/kaleid/kernel/ke/log.c
+++ b/kaleid/kernel/ke/log.c
@@ -40,7 +40,7 @@ error_t KernLog(const char *fmt, ...)
     return rc;
 }
 
-#ifndef _NO_DEBUG
+#ifndef NDEBUG
 //
 // Prints formatted string on debug output
 //
diff --git a/kaleid/extras/argv.c b/kaleid/kernel/sh/argv.c
similarity index 86%
rename from kaleid/extras/argv.c
rename to kaleid/kernel/sh/argv.c
index 102e431..8e132d3 100644
--- a/kaleid/extras/argv.c
+++ b/kaleid/kernel/sh/argv.c
@@ -22,37 +22,9 @@
 //  along with OS/K.  If not, see <https://www.gnu.org/licenses/>.            //
 //----------------------------------------------------------------------------//
 
-#include <ex/argv.h>
+#include <sh/argv.h>
 #include <ex/malloc.h>
 
-#include <kernel.h>
-
-//
-// Computes argument count, the least N such
-// that argv[N] == NULL
-//
-int KalComputeArgCount(const char **argv)
-{
-    int argc = 0;
-
-    while (argv[argc]) argc++;
-
-    return argc;
-}
-
-//
-// Computes the total size of argv, including
-// the null-terminators
-//
-size_t KalComputeArgVecSize(const char *argv[])
-{
-    size_t len;
-
-    for (len = 0; *argv; len += strlen(*argv) + 1, argv++);
-
-    return len;
-}
-
 //
 // Converts command line to an argument vector
 //
@@ -61,13 +33,10 @@ size_t KalComputeArgVecSize(const char *argv[])
 // with the address of the nth string stored in the first half,
 // specifically at argv[n-1]
 //
-// TODO long escape sequences
-//      get program command line if cmdLine == NULL
-//
-error_t KalCmdLineToArgVecEx(const char  *cmdLine,
-                             int         *argcPtr,
-                             char        *bufptr,
-                             bool         doEscaping)
+error_t ShCmdLineToArgVecEx(const char  *cmdLine,
+                            int         *argcPtr,
+                            char        *bufptr,
+                            bool         doEscaping)
 {
     int argc = 0;
     char quotes = 0;
@@ -213,9 +182,9 @@ error_t KalCmdLineToArgVecEx(const char  *cmdLine,
 #undef ISBLANK
 #undef NULLTERM_AND_SAVE
 
-error_t KalCmdLineToArgVec(const char  *cmdLine,
-                           int         *argcPtr,
-                           char        *bufptr)
+error_t ShCmdLineToArgVec(const char  *cmdLine,
+                          int         *argcPtr,
+                          char        *bufptr)
 {
-    return KalCmdLineToArgVecEx(cmdLine, argcPtr, bufptr, false);
+    return ShCmdLineToArgVecEx(cmdLine, argcPtr, bufptr, false);
 }
diff --git a/kaleid/kernel/sh/musage.c b/kaleid/kernel/sh/musage.c
index 4da4ca2..b97ca50 100644
--- a/kaleid/kernel/sh/musage.c
+++ b/kaleid/kernel/sh/musage.c
@@ -22,7 +22,10 @@
 //  along with OS/K.  If not, see <https://www.gnu.org/licenses/>.            //
 //----------------------------------------------------------------------------//
 
-#include "shell.h"
+#include <io/vga.h>
+#include <mm/heap.h>
+#include <sh/shell.h>
+#include <init/boot.h>
 
 error_t CmdMemUsage(int argc, char **argv, char *cmdline)
 {
diff --git a/kaleid/kernel/sh/shcmds.c b/kaleid/kernel/sh/shcmds.c
index 2839796..3530d2f 100644
--- a/kaleid/kernel/sh/shcmds.c
+++ b/kaleid/kernel/sh/shcmds.c
@@ -22,8 +22,15 @@
 //  along with OS/K.  If not, see <https://www.gnu.org/licenses/>.            //
 //----------------------------------------------------------------------------//
 
-#include "shell.h"
-
+#include <vers.h>
+#include <mm/mm.h>
+#include <io/ata.h>
+#include <io/vga.h>
+#include <io/spkr.h>
+#include <ke/time.h>
+#include <lib/buf.h>
+#include <sh/shell.h>
+#include <po/shtdwn.h>
 
 int ShAtoi(char* str)
 {
@@ -173,7 +180,7 @@ error_t CmdHelp(int argc, char **argv, char *cmdline)
 
     if (argc == 1) {
         KernLog("List of all shell built-ins:\n");
-        for (cmd = cmdtable; cmd->name != NULL; cmd++, count++) {
+        for (cmd = shcmdtable; cmd->name != NULL; cmd++, count++) {
             KernLog("\t%s", cmd->name);
             for (i = strlen(cmd->name)/4; i<3; i++) {
                 KernLog("\t");
@@ -224,7 +231,7 @@ error_t CmdReloadPage(int argc, char **argv, char *cmdline)
 
 error_t CmdShell(int argc, char **argv, char *cmdline)
 {
-    KeStartShell();
+    ShStartShell();
     return EOK;
 }
 
@@ -285,7 +292,8 @@ error_t CmdVersion(int argc, char **argv, char *cmdline)
 }
 
 //----------------------------------------------------------------------------//
-Command_t cmdtable[] =
+
+Command_t shcmdtable[] =
 {
     { "args",       CmdArgs,           "Print command line"                   },
     { "beep",       CmdBeep,           "Make a beep"                          },
diff --git a/kaleid/kernel/sh/shell.c b/kaleid/kernel/sh/shell.c
index 0a5a58b..f9bf1ab 100644
--- a/kaleid/kernel/sh/shell.c
+++ b/kaleid/kernel/sh/shell.c
@@ -22,15 +22,21 @@
 //  along with OS/K.  If not, see <https://www.gnu.org/licenses/>.            //
 //----------------------------------------------------------------------------//
 
-#include "shell.h"
-
-int shcol = VGA_COLOR_LIGHT_GREY;
+#include <io/vga.h>
+#include <io/keyb.h>
+#include <io/spkr.h>
+#include <lib/buf.h>
+#include <sh/argv.h>
+#include <sh/shell.h>
+#include <po/shtdwn.h>
 
 int shargc = 0;
-char *argvbuf = 0;
 char **shargv = 0;
+int shcol = VGA_COLOR_LIGHT_GREY;
 
-void ExecuteCommand(char *cmdbuf)
+static char *argvbuf = 0;
+
+static void ExecuteCommand(char *cmdbuf)
 {
     error_t rc;
     Command_t *cmd;
@@ -40,10 +46,10 @@ void ExecuteCommand(char *cmdbuf)
         return;
 
     memzero(*shargv, ARG_MAX);
-    rc = KalCmdLineToArgVec(cmdbuf, &shargc, argvbuf);
+    rc = ShCmdLineToArgVec(cmdbuf, &shargc, argvbuf);
     if (rc) KeStartPanic("Shell: Couldn't parse command line: %d", rc);
 
-    for (cmd = cmdtable; cmd->name != NULL; cmd++) {
+    for (cmd = shcmdtable; cmd->name != NULL; cmd++) {
         if (!strcmp(cmd->name, shargv[0])) {
             cmd->func(shargc, shargv, cmdbuf);
             found = true;
@@ -59,7 +65,7 @@ void ExecuteCommand(char *cmdbuf)
     }
 }
 
-void KeStartShell(void)
+void ShStartShell(void)
 {
     uchar ch;
     error_t rc;
diff --git a/kaleid/kernel/sh/shell.h b/kaleid/kernel/sh/shell.h
index 0edc933..e2f9b18 100644
--- a/kaleid/kernel/sh/shell.h
+++ b/kaleid/kernel/sh/shell.h
@@ -32,29 +32,9 @@
 #include <mm/heap.h>
 #include <io/spkr.h>
 #include <io/keyb.h>
-#include <io/vga.h>
 #include <po/shtdwn.h>
 #include <ke/cpuid.h>
 #include <io/ata.h>
 
-void KeStartShell(void);
-void pstest(void);
 
-extern int shcol;
-extern int shargc;
-extern char *argv0;
-extern char **shargv;
-
-#define CMDBUFSIZE 256
-
-typedef struct Command_t Command_t;
-
-struct Command_t
-{
-    const char *name;
-    error_t (*func)(int argc, char **argv, char *cmdline);
-    const char *help;
-};
-
-extern Command_t cmdtable[];