diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 9d5d538..8771b9a 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -11,7 +11,7 @@ jobs:
       - name: Install dependencies
         run: |
           sudo apt-get update
-          sudo apt-get install build-essential fasm mtools xorriso grub-common
+          sudo apt-get install build-essential fasm mtools xorriso grub-common wget
       - name: Build
         run: |
           make
diff --git a/bin/ar/archive.c b/bin/ar/archive.c
new file mode 100644
index 0000000..6106a39
--- /dev/null
+++ b/bin/ar/archive.c
@@ -0,0 +1,135 @@
+#include <stdlib.h>
+#include <string.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <ar.h>
+#include "archive.h"
+
+#ifndef O_BINARY
+# define O_BINARY 0
+#endif /* !O_BINARY */
+
+# define AR_STR_TO_NUM(to, from, len, buff, base) do { \
+		memcpy(buff, from, len); \
+		buf[len] = '\0'; \
+		to = strtol(buff, NULL, base); \
+	} while (0)
+
+static int
+read_data(int fd, void *buff, ssize_t size)
+{
+	ssize_t rbytes;
+	ssize_t total;
+
+	total = 0;
+	while ((rbytes = read(fd, (uint8_t *)(buff) + total, size - total)) != 0)
+	{
+		total += rbytes;
+		if (total >= size)
+		{
+			break;
+		}
+	}
+
+	return (total);
+}
+
+int
+archive_open(const char *path)
+{
+	int fd;
+	char buff[SARMAG];
+
+	if ((fd = open(path, O_RDWR | O_BINARY)) < 0)
+	{
+		return (-1);
+	}
+
+	if (read_data(fd, buff, SARMAG) != SARMAG)
+	{
+		goto err;
+	}
+
+	if (strncmp(ARMAG, buff, SARMAG) != 0)
+	{
+		goto err;
+	}
+
+	return (fd);
+err:
+	close(fd);
+	return (-1);
+}
+
+int
+archive_get_entry_hdr(int fd, struct archive_entry_hdr *entry_hdr)
+{
+	struct arhdr hdr;
+	ssize_t res;
+	char buf[13];
+	char *tmp;
+
+	entry_hdr->offset = lseek(fd, 0, SEEK_CUR);
+	res = read_data(fd, &hdr, sizeof(struct arhdr));
+	if (res != sizeof(struct arhdr))
+	{
+		if (res == 0)
+		{
+			return (0);
+		}
+		else
+		{
+			return (-1);
+		}
+	}
+
+	if (strncmp(ARFMAG, (char *)hdr.ar_fmag, 2) != 0)
+	{
+		return (-1);
+	}
+
+	AR_STR_TO_NUM(entry_hdr->date, hdr.ar_date, 12, buf, 10);
+	AR_STR_TO_NUM(entry_hdr->uid, hdr.ar_uid, 6, buf, 10);
+	AR_STR_TO_NUM(entry_hdr->gid, hdr.ar_gid, 6, buf, 10);
+	AR_STR_TO_NUM(entry_hdr->mode, hdr.ar_mode, 8, buf, 8);
+	AR_STR_TO_NUM(entry_hdr->size, hdr.ar_size, 10, buf, 10);
+
+	if (strncmp(AR_EXTNAME, (char *)hdr.ar_name, AR_EXTNAME_SZ) == 0)
+	{
+		res = atoi((char *)(hdr.ar_name + AR_EXTNAME_SZ));
+		read_data(fd, entry_hdr->name, res);
+
+		entry_hdr->name[res] = '\0';
+		entry_hdr->size -= res;
+	}
+	else
+	{
+		memcpy(entry_hdr->name, hdr.ar_name, 16);
+		for (tmp = entry_hdr->name + 15; *tmp == ' '; tmp--)
+		{
+			*tmp = '\0';
+		}
+	}
+
+	return (1);
+}
+
+size_t
+archive_skip_entry(int fd, struct archive_entry_hdr *hdr)
+{
+	size_t sz;
+
+	sz = hdr->size;
+	if (hdr->size % 2 != 0)
+	{
+		sz++; /* skip 0x0A */
+	}
+	return (lseek(fd, sz, SEEK_CUR));
+}
+
+int
+archive_close(int fd)
+{
+	return (close(fd));
+}
diff --git a/bin/ar/archive.h b/bin/ar/archive.h
new file mode 100644
index 0000000..79ae58e
--- /dev/null
+++ b/bin/ar/archive.h
@@ -0,0 +1,25 @@
+#include "ar.h"
+#ifndef AR_ARCHIVE_H
+# define AR_ARCHIVE_H 1
+
+# include <stdint.h>
+
+struct archive_entry_hdr {
+	unsigned offset;
+	time_t date;
+	int gid;
+	int uid;
+	uint16_t mode;
+	size_t size;
+	char name[255];
+};
+
+int archive_open(const char *path);
+int archive_close(int fd);
+int archive_decode_entry_hdr(struct archive_entry_hdr *dest, struct arhdr *src);
+int archive_encode_entry_hdr(struct arhdr *dest, struct archive_entry_hdr *src);
+int archive_get_entry_hdr(int fd, struct archive_entry_hdr *entry_hdr);
+size_t archive_skip_entry(int fd, struct archive_entry_hdr *entry_hdr);
+int archive_copy();
+
+#endif /* !AR_ARCHIVE_H */
diff --git a/bin/cmd/builtins.inc b/bin/cmd/builtins.inc
index 523e36d..247b3d7 100644
--- a/bin/cmd/builtins.inc
+++ b/bin/cmd/builtins.inc
@@ -1,6 +1,10 @@
-builtins:
-        db 2, 'cd'
-        db 1, '.'
-        db 3, 'set'
-        db 5, 'unset'
-        db 4, 'exit'
\ No newline at end of file
+public builtins
+builtins:
+        db 2, 'cd'
+        db 1, '.'
+        db 3, 'set'
+        db 5, 'unset'
+        db 4, 'exit'
+
+public zz
+zz db "xptdr", 0
diff --git a/bin/cmd/cmd.asm b/bin/cmd/cmd.asm
index c7318ae..e9dea1a 100644
--- a/bin/cmd/cmd.asm
+++ b/bin/cmd/cmd.asm
@@ -1,13 +1,26 @@
-	format COFF
-
-	section '.text' code
-
-	public main
-	public _start
-_start:	
-main:
-	int 0x2A
-
-	section '.data' data
-
-	INCLUDE 'builtins.inc'
+	format COFF
+
+	section '.text' code
+	extrn lulz
+	public main
+	public _start
+_start:	
+	jmp main
+main:
+	call dummy_long_str
+	int 0x2A
+
+	call lulz
+
+	ret
+
+	public dummy_long_str
+dummy_long_str:
+	xor eax, eax
+	mov esi, zz
+	int 0x41
+	ret
+
+	section '.data' data
+
+	INCLUDE 'builtins.inc'
diff --git a/bin/ranlib/main.c b/bin/ranlib/main.c
index 95485db..20641e9 100644
--- a/bin/ranlib/main.c
+++ b/bin/ranlib/main.c
@@ -1,5 +1,244 @@
-int
-main(void)
+#include <stdint.h>
+#include <string.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <coff.h>
+#include <ranlib.h>
+#include "../ar/archive.h"
+#include "ar.h"
+
+struct rsym {
+	uint32_t offset;
+	char *symstr;
+
+	struct rsym *next;
+	struct rsym **prev;
+};
+
+#define DEFAULT_MODE 0644
+
+static int opt_U = 0;
+static const char *tmp_path = "ranlib.XXXXXX";
+
+static int
+temp_archive(void)
 {
-	return 0;
+	char path[19];
+	int fd;
+
+	memcpy(path, tmp_path, 19);
+	fd = mkstemp(path);
+	if (fd < 0)
+	{
+		perror(path);
+		return (-1);
+	}
+	unlink(path);
+	return (fd);
+}
+
+static void
+coff_addsym(struct rsym **syms, int *symcnt, char *strtab, SYMENT *syment)
+{
+	struct rsym *sym;
+	char nbuff[9];
+	char *name;
+
+	if (syment->n_scnum < 1 || syment->n_sclass != C_EXT)
+	{
+		return;
+	}
+
+	sym = malloc(sizeof(struct rsym));
+	if (sym == NULL)
+	{
+		return;
+	}
+
+	if (syment->n_zeroes == 0)
+	{
+		name = strtab + syment->n_offset;
+	}
+	else
+	{
+		memcpy(nbuff, syment->n_name, 8);
+		nbuff[8] = '\0';
+
+		name = nbuff;
+	}
+
+
+}
+
+static void
+coff_getsym(struct rsym **syms, int *symcnt, int fd, struct archive_entry_hdr *entry)
+{
+	size_t off;
+	FILHDR hdr;
+	char *strtab;
+	uint32_t strtabsz;
+	SYMENT syment;
+	int idx;
+
+	off = lseek(fd, 0, SEEK_CUR);
+	strtab = NULL;
+
+	if (read(fd, &hdr, FILHSZ) != FILHSZ)
+	{
+		goto end;
+	}
+
+	if (hdr.f_magic != F_MACH_I386 || (hdr.f_flags & F_EXEC) != 0
+			|| (hdr.f_flags & F_LSYMS) != 0)
+	{
+		goto end;
+	}
+
+	/* load strtab but first we need to skip symtab */
+	lseek(fd, off + hdr.f_symptr, SEEK_SET);
+	for (idx = 0; idx < hdr.f_nsyms; idx++)
+	{
+		if (read(fd, &syment, SYMESZ) != SYMESZ)
+		{
+			goto end;
+		}
+
+		/* skip auxent */
+		if (syment.n_numaux)
+		{
+			lseek(fd, AUXESZ * syment.n_numaux, SEEK_CUR);
+		}
+	}
+
+	if (read(fd, &strtabsz, sizeof(uint32_t)) != sizeof(uint32_t))
+	{
+		goto end;
+	}
+
+	strtab = malloc(strtabsz);
+	if (strtab == NULL)
+	{
+		goto end;
+	}
+
+	if (read(fd, strtab, strtabsz) != strtabsz)
+	{
+		goto end;
+	}
+
+	/* go back to symtab */
+	lseek(fd, off + hdr.f_symptr, SEEK_SET);
+	for (idx = 0; idx < hdr.f_nsyms; idx++)
+	{
+		if (read(fd, &syment, SYMESZ) != SYMESZ)
+		{
+			goto end;
+		}
+		if (syment.n_numaux)
+		{
+			lseek(fd, AUXESZ * syment.n_numaux, SEEK_CUR);
+		}
+
+		coff_addsym(syms, symcnt, strtab, &syment);
+	}
+end:
+	free(strtab);
+	lseek(fd, off, SEEK_SET);
+}
+
+static int
+ranlib(const char *archive)
+{
+	int arfd;
+	int tmpfd;
+	struct rsym *syms;
+	int symcnt;
+	struct archive_entry_hdr entry;
+
+	syms = NULL;
+	symcnt = 0;
+
+	if ((arfd = archive_open(archive)) < 0)
+	{
+		return (-1);
+	}
+
+	if ((tmpfd = temp_archive()) < 0)
+	{
+		archive_close(arfd);
+		return (-1);
+	}
+
+	while (archive_get_entry_hdr(arfd, &entry) > 0)
+	{
+		printf("Entry: %s\n", entry.name);
+		if (strcmp(AR_SYMTAB_NAME, entry.name) == 0)
+		{
+			archive_skip_entry(arfd, &entry);
+			continue;
+		}
+
+		archive_skip_entry(arfd, &entry);
+	}
+
+	close(tmpfd);
+	archive_close(arfd);
+
+	return (0);
+}
+
+static void
+usage(int retval)
+{
+	if (retval == EXIT_FAILURE)
+	{
+		fprintf(stderr, "Try 'ranlib -h' for more information.\n");
+	}
+	else
+	{
+		printf("Usage: ranlib [-D] [-U] archive...\n");
+		printf("\t-h\tdisplay this help and exit\n");
+		printf("\t-D\tfill mtime, uid, gid with 0 (DEFAULT)\n");
+		printf("\t-U\tinsert the real mtime, uid, gid ...\n");
+	}
+
+	exit(retval);
+}
+
+int
+main(int argc, char **argv)
+{
+	int fd;
+	struct archive_entry_hdr entry_hdr;
+
+	while ((argc > 1) && (argv[1][0] == '-'))
+	{
+		switch (argv[1][1])
+		{
+			case 'h':
+				usage(EXIT_SUCCESS);
+				break;
+			case 'D':
+				opt_U = 0;
+				break;
+			case 'U':
+				opt_U = 1;
+				break;
+		}
+
+		argv++;
+		argc--;
+	}
+
+	if (argc <= 1) usage(EXIT_FAILURE);
+
+	while (argc > 1)
+	{
+		ranlib(argv[1]);
+		argv++;
+		argc--;
+	}
+
+	return (EXIT_SUCCESS);
 }
diff --git a/bin/readcoff/main.c b/bin/readcoff/main.c
index 7137765..185cdba 100644
--- a/bin/readcoff/main.c
+++ b/bin/readcoff/main.c
@@ -62,6 +62,7 @@ static int display_header = 0;
 static int display_optional_header = 0;
 static int display_sections = 0;
 static int display_symbol_table = 0;
+static int display_relocs = 0;
 
 static void
 usage(int retval)
@@ -95,10 +96,12 @@ main(int argc, char **argv)
 	AOUTHDR aout_header;
 	SCNHDR section_header;
 	SYMENT sym_entry;
+	RELOC reloc_entry;
 	char name[9];
 	char *type;
 	FILE *fp;
 	int idx;
+	int j;
 	time_t timedat;
 	char *string_table;
 	size_t sz_stable;
@@ -118,10 +121,20 @@ main(int argc, char **argv)
 				display_optional_header = 1;
 				display_symbol_table = 1;
 				display_sections = 1;
+				//display_relocs = 1;
+				break;
+			case 'r':
+				display_relocs = 1;
 				break;
 			case 'H':
 				display_header = 1;
 				break;
+			case 's':
+				display_symbol_table = 1;
+				break;
+			case 'S':
+				display_sections = 1;
+				break;
 			case 'h':
 				usage(EXIT_SUCCESS);
 				break;
@@ -238,6 +251,32 @@ main(int argc, char **argv)
 		printf("\n");
 	}
 
+	if (display_relocs)
+	{
+		for (idx = 0; idx < file_header.f_nscns; idx++)
+		{
+			fseek(fp, file_header.f_opthdr + FILHSZ + (SCNHSZ * idx), SEEK_SET);
+			if (fread(&section_header, 1, SCNHSZ, fp) != SCNHSZ)
+			{
+				return (EXIT_FAILURE);
+			}
+
+			if (section_header.s_relptr == 0 || section_header.s_nreloc == 0) continue;
+
+			memset(name, 0, 9);
+			memcpy(name, section_header.s_name, 8);
+			printf("Relocation for section '%s' at offset 0x%X contains %hu entries:\n", name, section_header.s_relptr, section_header.s_nreloc);
+			printf(" Address  Index    Type\n");
+			fseek(fp, section_header.s_relptr, SEEK_SET);
+			for (j = 0; j < section_header.s_nreloc; j++)
+			{
+				fread(&reloc_entry, 1, RELSZ, fp);
+				printf(" %08X %08X %04ho\n", reloc_entry.r_vaddr, reloc_entry.r_symndx, reloc_entry.r_type);
+			}
+			printf("\n");
+		}
+	}
+
 	if (display_symbol_table)
 	{
 		fseek(fp, 0L, SEEK_END);
@@ -248,16 +287,13 @@ main(int argc, char **argv)
 		printf("Symbol table contains %d entries:\n", file_header.f_nsyms);
 		printf("  Num:    Value  Type Name\n");
 		assert(sizeof(SYMENT) == SYMESZ);
-		for (idx = 0; idx <= file_header.f_nsyms; idx++)
+		for (idx = 0; idx < file_header.f_nsyms; idx++)
 		{
 			fseek(fp, file_header.f_symptr + (SYMESZ * idx), SEEK_SET);
 			fread(&sym_entry, 1, SYMESZ, fp);
 			memset(name, 0, 9);
 			memcpy(name, sym_entry.n_name, 8);
-			if (sym_entry.n_zeroes == 0)
-			{
-			}
-			printf("  %2d:    %08x  %hd ", idx, sym_entry.n_value, sym_entry.n_type);
+			printf("  %2d:    %08x  %hu %d %hd ", idx, sym_entry.n_value, sym_entry.n_type, sym_entry.n_sclass, sym_entry.n_scnum);
 			if (sym_entry.n_zeroes)
 			{
 				printf("%s\n", name);
diff --git a/boot/loader/loader.asm b/boot/loader/loader.asm
index 3338d0b..6c09612 100644
--- a/boot/loader/loader.asm
+++ b/boot/loader/loader.asm
@@ -280,6 +280,8 @@ common32:
 	or eax, (CR0_PG or CR0_WP)
 	mov cr0, eax
 
+	cli ; ensure interrupt are disabled
+
 	mov eax, STPDBOOT_MAGIC
 	mov ebx, boot_structure
 
diff --git a/include/ar.h b/include/ar.h
index 03bc7aa..14c5c20 100644
--- a/include/ar.h
+++ b/include/ar.h
@@ -10,6 +10,9 @@
 
 # define AR_SYMTAB_NAME "__.SYMDEF"
 
+# define AR_EXTNAME    "#1/"
+# define AR_EXTNAME_SZ 3
+
 typedef struct arhdr {
 	uint8_t ar_name[16];
 	uint8_t ar_date[12];
diff --git a/kernel/kernel.asm b/kernel/kernel.asm
index 9c0cf51..98402ee 100644
--- a/kernel/kernel.asm
+++ b/kernel/kernel.asm
@@ -65,11 +65,9 @@ kmain:
 
 	mov eax, 4
 	call pmm_alloc
-	xchg bx, bx
 
 	mov edx, 4
 	call pmm_free
-	xchg bx, bx
 
 	call pic_init
 
diff --git a/kernel/mm/mm.inc b/kernel/mm/mm.inc
index 17b4448..7f76bce 100644
--- a/kernel/mm/mm.inc
+++ b/kernel/mm/mm.inc
@@ -30,8 +30,6 @@ mm_init:
 	mov ecx, VMEM_VM_BESTFIT
 	call vmem_alloc
 
-	xchg bx, bx
-
 	ret
 
 szVmemKernelName db "kmem", 0
diff --git a/tools/Makefile b/tools/Makefile
index f12d9bd..bd09f1e 100644
--- a/tools/Makefile
+++ b/tools/Makefile
@@ -15,7 +15,7 @@ elf2coff$(EXEXT): ../bin/elf2coff/main.c
 parted$(EXEXT): ../sbin/parted/main.c
 	$(TOOL_CC) -o $@ $^ $(CFLAGS) $(LDFLAGS)
 
-ranlib$(EXEXT): ../bin/ranlib/main.c
+ranlib$(EXEXT): ../bin/ranlib/main.c ../bin/ar/archive.c
 	$(TOOL_CC) -o $@ $^ $(CFLAGS) $(LDFLAGS)
 
 ar$(EXEXT): ../bin/ar/main.c