diff --git a/include/assert.h b/include/assert.h
new file mode 100644
index 0000000..7b80a28
--- /dev/null
+++ b/include/assert.h
@@ -0,0 +1,6 @@
+#ifndef __ASSERT_H
+#define __ASSERT_H
+
+#define assert(x)
+
+#endif /* __ASSERT_H */
diff --git a/include/console.h b/include/console.h
new file mode 100644
index 0000000..a1cf599
--- /dev/null
+++ b/include/console.h
@@ -0,0 +1,24 @@
+#ifndef __CONSOLE_H
+#define __CONSOLE_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef void (*console_write_hook)(char);
+typedef char (*console_read_hook)(void);
+typedef int (*console_read_nonblock_hook)(void);
+
+void console_set_write_hook(console_write_hook h);
+void console_set_read_hook(console_read_hook r, console_read_nonblock_hook rn);
+
+char readchar(void);
+int readchar_nonblock(void);
+
+void putsnonl(const char *s);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __CONSOLE_H */
diff --git a/include/crc.h b/include/crc.h
new file mode 100644
index 0000000..88c8d95
--- /dev/null
+++ b/include/crc.h
@@ -0,0 +1,15 @@
+#ifndef __CRC_H
+#define __CRC_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+unsigned short crc16(const unsigned char *buffer, int len);
+unsigned int crc32(const unsigned char *buffer, unsigned int len);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
diff --git a/include/csr-defs.h b/include/csr-defs.h
new file mode 100644
index 0000000..d98e8df
--- /dev/null
+++ b/include/csr-defs.h
@@ -0,0 +1,11 @@
+#ifndef CSR_DEFS__H
+#define CSR_DEFS__H
+
+#define CSR_MSTATUS_MIE 0x8
+
+#define CSR_IRQ_MASK 0xBC0
+#define CSR_IRQ_PENDING 0xFC0
+
+#define CSR_DCACHE_INFO 0xCC0
+
+#endif	/* CSR_DEFS__H */
diff --git a/include/ctype.h b/include/ctype.h
new file mode 100644
index 0000000..6936859
--- /dev/null
+++ b/include/ctype.h
@@ -0,0 +1,63 @@
+#ifndef __CTYPE_H
+#define __CTYPE_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/*
+ * NOTE! This ctype does not handle EOF like the standard C
+ * library is required to.
+ */
+
+#define _U	0x01	/* upper */
+#define _L	0x02	/* lower */
+#define _D	0x04	/* digit */
+#define _C	0x08	/* cntrl */
+#define _P	0x10	/* punct */
+#define _S	0x20	/* white space (space/lf/tab) */
+#define _X	0x40	/* hex digit */
+#define _SP	0x80	/* hard space (0x20) */
+
+extern const unsigned char _ctype[];
+
+#define __ismask(x) (_ctype[(int)(unsigned char)(x)])
+
+#define isalnum(c)	((__ismask(c)&(_U|_L|_D)) != 0)
+#define isalpha(c)	((__ismask(c)&(_U|_L)) != 0)
+#define iscntrl(c)	((__ismask(c)&(_C)) != 0)
+#define isdigit(c)	((__ismask(c)&(_D)) != 0)
+#define isgraph(c)	((__ismask(c)&(_P|_U|_L|_D)) != 0)
+#define islower(c)	((__ismask(c)&(_L)) != 0)
+#define isprint(c)	((__ismask(c)&(_P|_U|_L|_D|_SP)) != 0)
+#define ispunct(c)	((__ismask(c)&(_P)) != 0)
+/* Note: isspace() must return false for %NUL-terminator */
+#define isspace(c)	((__ismask(c)&(_S)) != 0)
+#define isupper(c)	((__ismask(c)&(_U)) != 0)
+#define isxdigit(c)	((__ismask(c)&(_D|_X)) != 0)
+
+#define isascii(c) (((unsigned char)(c))<=0x7f)
+#define toascii(c) (((unsigned char)(c))&0x7f)
+
+static inline unsigned char __tolower(unsigned char c)
+{
+	if (isupper(c))
+		c -= 'A'-'a';
+	return c;
+}
+
+static inline unsigned char __toupper(unsigned char c)
+{
+	if (islower(c))
+		c -= 'a'-'A';
+	return c;
+}
+
+#define tolower(c) __tolower(c)
+#define toupper(c) __toupper(c)
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __CTYPE_H */
diff --git a/include/endian.h b/include/endian.h
new file mode 100644
index 0000000..81cf215
--- /dev/null
+++ b/include/endian.h
@@ -0,0 +1,30 @@
+#ifndef __ENDIAN_H
+#define __ENDIAN_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define __LITTLE_ENDIAN 0
+#define __BIG_ENDIAN 1
+#define __BYTE_ORDER __BIG_ENDIAN
+
+static inline unsigned int le32toh(unsigned int val)
+{
+	return (val & 0xff) << 24 |
+		(val & 0xff00) << 8 |
+		(val & 0xff0000) >> 8 |
+		(val & 0xff000000) >> 24;
+}
+
+static inline unsigned short le16toh(unsigned short val)
+{
+	return (val & 0xff) << 8 |
+		(val & 0xff00) >> 8;
+}
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __ENDIAN_H */
diff --git a/include/errno.h b/include/errno.h
new file mode 100644
index 0000000..be05873
--- /dev/null
+++ b/include/errno.h
@@ -0,0 +1,261 @@
+#ifndef __ERRNO_H
+#define __ERRNO_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+extern int errno;
+
+#define EPERM               1
+#define EPERM_STR           "Operation not permitted"
+#define ENOENT              2
+#define ENOENT_STR          "No such file or directory"
+#define ESRCH               3
+#define ESRCH_STR           "No such process"
+#define EINTR               4
+#define EINTR_STR           "Interrupted system call"
+#define EIO                 5
+#define EIO_STR             "I/O error"
+#define ENXIO               6
+#define ENXIO_STR           "No such device or address"
+#define E2BIG               7
+#define E2BIG_STR           "Arg list too long"
+#define ENOEXEC             8
+#define ENOEXEC_STR         "Exec format error"
+#define EBADF               9
+#define EBADF_STR           "Bad file number"
+#define ECHILD              10
+#define ECHILD_STR          "No child processes"
+#define EAGAIN              11
+#define EWOULDBLOCK         EAGAIN
+#define EAGAIN_STR          "Try again"
+#define ENOMEM              12
+#define ENOMEM_STR          "Out of memory"
+#define EACCES              13
+#define EACCES_STR          "Permission denied"
+#define EFAULT              14
+#define EFAULT_STR          "Bad address"
+#define ENOTBLK             15
+#define ENOTBLK_STR         "Block device required"
+#define EBUSY               16
+#define EBUSY_STR           "Device or resource busy"
+#define EEXIST              17
+#define EEXIST_STR          "File exists"
+#define EXDEV               18
+#define EXDEV_STR           "Cross-device link"
+#define ENODEV              19
+#define ENODEV_STR          "No such device"
+#define ENOTDIR             20
+#define ENOTDIR_STR         "Not a directory"
+#define EISDIR              21
+#define EISDIR_STR          "Is a directory"
+#define EINVAL              22
+#define EINVAL_STR          "Invalid argument"
+#define ENFILE              23
+#define ENFILE_STR          "File table overflow"
+#define EMFILE              24
+#define EMFILE_STR          "Too many open files"
+#define ENOTTY              25
+#define ENOTTY_STR          "Not a typewriter"
+#define ETXTBSY             26
+#define ETXTBSY_STR         "Text file busy"
+#define EFBIG               27
+#define EFBIG_STR           "File too large"
+#define ENOSPC              28
+#define ENOSPC_STR          "No space left on device"
+#define ESPIPE              29
+#define ESPIPE_STR          "Illegal seek"
+#define EROFS               30
+#define EROFS_STR           "Read-only file system"
+#define EMLINK              31
+#define EMLINK_STR          "Too many links"
+#define EPIPE               32
+#define EPIPE_STR           "Broken pipe"
+#define EDOM                33
+#define EDOM_STR            "Math argument out of domain of func"
+#define ERANGE              34
+#define ERANGE_STR          "Math result not representable"
+#define EDEADLK             35
+#define EDEADLOCK           EDEADLK
+#define EDEADLK_STR         "Resource deadlock would occur"
+#define ENAMETOOLONG        36
+#define ENAMETOOLONG_STR    "File name too long"
+#define ENOLCK              37
+#define ENOLCK_STR          "No record locks available"
+#define ENOSYS              38
+#define ENOSYS_STR          "Function not implemented"
+#define ENOTEMPTY           39
+#define ENOTEMPTY_STR       "Directory not empty"
+#define ELOOP               40
+#define ELOOP_STR           "Too many symbolic links encountered"
+#define ENOMSG              42
+#define ENOMSG_STR          "No message of desired type"
+#define EIDRM               43
+#define EIDRM_STR           "Identifier removed"
+#define ECHRNG              44
+#define ECHRNG_STR          "Channel number out of range"
+#define EL2NSYNC            45
+#define EL2NSYNC_STR        "Level 2 not synchronized"
+#define EL3HLT              46
+#define EL3HLT_STR          "Level 3 halted"
+#define EL3RST              47
+#define EL3RST_STR          "Level 3 reset"
+#define ELNRNG              48
+#define ELNRNG_STR          "Link number out of range"
+#define EUNATCH             49
+#define EUNATCH_STR         "Protocol driver not attached"
+#define ENOCSI              50
+#define ENOCSI_STR          "No CSI structure available"
+#define EL2HLT              51
+#define EL2HLT_STR          "Level 2 halted"
+#define EBADE               52
+#define EBADE_STR           "Invalid exchange"
+#define EBADR               53
+#define EBADR_STR           "Invalid request descriptor"
+#define EXFULL              54
+#define EXFULL_STR          "Exchange full"
+#define ENOANO              55
+#define ENOANO_STR          "No anode"
+#define EBADRQC             56
+#define EBADRQC_STR         "Invalid request code"
+#define EBADSLT             57
+#define EBADSLT_STR         "Invalid slot"
+#define EBFONT              59
+#define EBFONT_STR          "Bad font file format"
+#define ENOSTR              60
+#define ENOSTR_STR          "Device not a stream"
+#define ENODATA             61
+#define ENODATA_STR         "No data available"
+#define ETIME               62
+#define ETIME_STR           "Timer expired"
+#define ENOSR               63
+#define ENOSR_STR           "Out of streams resources"
+#define ENONET              64
+#define ENONET_STR          "Machine is not on the network"
+#define ENOPKG              65
+#define ENOPKG_STR          "Package not installed"
+#define EREMOTE             66
+#define EREMOTE_STR         "Object is remote"
+#define ENOLINK             67
+#define ENOLINK_STR         "Link has been severed"
+#define EADV                68
+#define EADV_STR            "Advertise error"
+#define ESRMNT              69
+#define ESRMNT_STR          "Srmount error"
+#define ECOMM               70
+#define ECOMM_STR           "Communication error on send"
+#define EPROTO              71
+#define EPROTO_STR          "Protocol error"
+#define EMULTIHOP           72
+#define EMULTIHOP_STR       "Multihop attempted"
+#define EDOTDOT             73
+#define EDOTDOT_STR         "RFS specific error"
+#define EBADMSG             74
+#define EBADMSG_STR         "Not a data message"
+#define EOVERFLOW           75
+#define EOVERFLOW_STR       "Value too large for defined data type"
+#define ENOTUNIQ            76
+#define ENOTUNIQ_STR        "Name not unique on network"
+#define EBADFD              77
+#define EBADFD_STR          "File descriptor in bad state"
+#define EREMCHG             78
+#define EREMCHG_STR         "Remote address changed"
+#define ELIBACC             79
+#define ELIBACC_STR         "Can not access a needed shared library"
+#define ELIBBAD             80
+#define ELIBBAD_STR         "Accessing a corrupted shared library"
+#define ELIBSCN             81
+#define ELIBSCN_STR         ".lib section in a.out corrupted"
+#define ELIBMAX             82
+#define ELIBMAX_STR         "Attempting to link in too many shared libraries"
+#define ELIBEXEC            83
+#define ELIBEXEC_STR        "Cannot exec a shared library directly"
+#define EILSEQ              84
+#define EILSEQ_STR          "Illegal byte sequence"
+#define ERESTART            85
+#define ERESTART_STR        "Interrupted system call should be restarted"
+#define ESTRPIPE            86
+#define ESTRPIPE_STR        "Streams pipe error"
+#define EUSERS              87
+#define EUSERS_STR          "Too many users"
+#define ENOTSOCK            88
+#define ENOTSOCK_STR        "Socket operation on non-socket"
+#define EDESTADDRREQ        89
+#define EDESTADDRREQ_STR    "Destination address required"
+#define EMSGSIZE            90
+#define EMSGSIZE_STR        "Message too long"
+#define EPROTOTYPE          91
+#define EPROTOTYPE_STR      "Protocol wrong type for socket"
+#define ENOPROTOOPT         92
+#define ENOPROTOOPT_STR     "Protocol not available"
+#define EPROTONOSUPPORT      93
+#define EPROTONOSUPPORT_STR "Protocol not supported"
+#define ESOCKTNOSUPPORT     94
+#define ESOCKTNOSUPPORT_STR "Socket type not supported"
+#define EOPNOTSUPP          95
+#define EOPNOTSUPP_STR      "Operation not supported on transport endpoint"
+#define EPFNOSUPPORT        96
+#define EPFNOSUPPORT_STR    "Protocol family not supported"
+#define EAFNOSUPPORT        97
+#define EAFNOSUPPORT_STR    "Address family not supported by protocol"
+#define EADDRINUSE          98
+#define EADDRINUSE_STR      "Address already in use"
+#define EADDRNOTAVAIL       99
+#define EADDRNOTAVAIL_STR   "Cannot assign requested address"
+#define ENETDOWN            100
+#define ENETDOWN_STR        "Network is down"
+#define ENETUNREACH         101
+#define ENETUNREACH_STR     "Network is unreachable"
+#define ENETRESET           102
+#define ENETRESET_STR       "Network dropped connection because of reset"
+#define ECONNABORTED        103
+#define ECONNABORTED_STR    "Software caused connection abort"
+#define ECONNRESET          104
+#define ECONNRESET_STR      "Connection reset by peer"
+#define ENOBUFS             105
+#define ENOBUFS_STR         "No buffer space available"
+#define EISCONN             106
+#define EISCONN_STR         "Transport endpoint is already connected"
+#define ENOTCONN            107
+#define ENOTCONN_STR        "Transport endpoint is not connected"
+#define ESHUTDOWN           108
+#define ESHUTDOWN_STR       "Cannot send after transport endpoint shutdown"
+#define ETOOMANYREFS        109
+#define ETOOMANYREFS_STR    "Too many references: cannot splice"
+#define ETIMEDOUT           110
+#define ETIMEDOUT_STR       "Connection timed out"
+#define ECONNREFUSED        111
+#define ECONNREFUSED_STR    "Connection refused"
+#define EHOSTDOWN           112
+#define EHOSTDOWN_STR       "Host is down"
+#define EHOSTUNREACH        113
+#define EHOSTUNREACH_STR    "No route to host"
+#define EALREADY            114
+#define EALREADY_STR        "Operation already in progress"
+#define EINPROGRESS         115
+#define EINPROGRESS_STR     "Operation now in progress"
+#define ESTALE              116
+#define ESTALE_STR          "Stale NFS file handle"
+#define EUCLEAN             117
+#define EUCLEAN_STR         "Structure needs cleaning"
+#define ENOTNAM             118
+#define ENOTNAM_STR         "Not a XENIX named type file"
+#define ENAVAIL             119
+#define ENAVAIL_STR         "No XENIX semaphores available"
+#define EISNAM              120
+#define EISNAM_STR          "Is a named type file"
+#define EREMOTEIO           121
+#define EREMOTEIO_STR       "Remote I/O error"
+#define EDQUOT              122
+#define EDQUOT_STR          "Quota exceeded"
+#define ENOMEDIUM           123
+#define ENOMEDIUM_STR       "No medium found"
+#define EMEDIUMTYPE         124
+#define EMEDIUMTYPE_STR     "Wrong medium type"
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __ERRNO_H */
diff --git a/include/fdlibm/fdlibm.h b/include/fdlibm/fdlibm.h
new file mode 100644
index 0000000..60a8df6
--- /dev/null
+++ b/include/fdlibm/fdlibm.h
@@ -0,0 +1,216 @@
+
+/* @(#)fdlibm.h 1.5 04/04/22 */
+/*
+ * ====================================================
+ * Copyright (C) 2004 by Sun Microsystems, Inc. All rights reserved.
+ *
+ * Permission to use, copy, modify, and distribute this
+ * software is freely granted, provided that this notice
+ * is preserved.
+ * ====================================================
+ */
+
+/* Sometimes it's necessary to define __LITTLE_ENDIAN explicitly
+   but these catch some common cases. */
+
+#if defined(i386) || defined(i486) || \
+  defined(intel) || defined(x86) || defined(i86pc) || \
+  defined(__alpha) || defined(__osf__)
+#define __LITTLE_ENDIAN
+#endif
+
+#ifdef __LITTLE_ENDIAN
+#define __HI(x) *(1+(int*)&x)
+#define __LO(x) *(int*)&x
+#define __HIp(x) *(1+(int*)x)
+#define __LOp(x) *(int*)x
+#else
+#define __HI(x) *(int*)&x
+#define __LO(x) *(1+(int*)&x)
+#define __HIp(x) *(int*)x
+#define __LOp(x) *(1+(int*)x)
+#endif
+
+#ifdef __STDC__
+#define __P(p)  p
+#else
+#define __P(p)  ()
+#endif
+
+/*
+ * ANSI/POSIX
+ */
+
+extern int signgam;
+
+#define MAXFLOAT  ((float)3.40282346638528860e+38)
+
+enum fdversion {fdlibm_ieee = -1, fdlibm_svid, fdlibm_xopen, fdlibm_posix};
+
+#define _LIB_VERSION_TYPE enum fdversion
+#define _LIB_VERSION _fdlib_version
+
+/* if global variable _LIB_VERSION is not desirable, one may
+ * change the following to be a constant by:
+ *  #define _LIB_VERSION_TYPE const enum version
+ * In that case, after one initializes the value _LIB_VERSION (see
+ * s_lib_version.c) during compile time, it cannot be modified
+ * in the middle of a program
+ */
+extern  _LIB_VERSION_TYPE  _LIB_VERSION;
+
+#define _IEEE_  fdlibm_ieee
+#define _SVID_  fdlibm_svid
+#define _XOPEN_ fdlibm_xopen
+#define _POSIX_ fdlibm_posix
+
+struct exception {
+  int type;
+  char *name;
+  double arg1;
+  double arg2;
+  double retval;
+};
+
+#define HUGE    MAXFLOAT
+
+/*
+ * set X_TLOSS = pi*2**52, which is possibly defined in <values.h>
+ * (one may replace the following line by "#include <values.h>")
+ */
+
+#define X_TLOSS   1.41484755040568800000e+16
+
+#define DOMAIN    1
+#define SING    2
+#define OVERFLOW  3
+#define UNDERFLOW 4
+#define TLOSS   5
+#define PLOSS   6
+
+/*
+ * ANSI/POSIX
+ */
+extern double acos __P((double));
+extern double asin __P((double));
+extern double atan __P((double));
+extern double atan2 __P((double, double));
+extern double cos __P((double));
+extern double sin __P((double));
+extern double tan __P((double));
+
+extern double cosh __P((double));
+extern double sinh __P((double));
+extern double tanh __P((double));
+
+extern double exp __P((double));
+extern double frexp __P((double, int *));
+extern double ldexp __P((double, int));
+extern double log __P((double));
+extern double log10 __P((double));
+extern double modf __P((double, double *));
+
+extern double pow __P((double, double));
+extern double sqrt __P((double));
+
+extern double ceil __P((double));
+extern double fabs __P((double));
+extern double floor __P((double));
+extern double fmod __P((double, double));
+
+extern double erf __P((double));
+extern double erfc __P((double));
+extern double gamma __P((double));
+extern double hypot __P((double, double));
+extern int isnan __P((double));
+extern int finite __P((double));
+extern double j0 __P((double));
+extern double j1 __P((double));
+extern double jn __P((int, double));
+extern double lgamma __P((double));
+extern double y0 __P((double));
+extern double y1 __P((double));
+extern double yn __P((int, double));
+
+extern double acosh __P((double));
+extern double asinh __P((double));
+extern double atanh __P((double));
+extern double cbrt __P((double));
+extern double logb __P((double));
+extern double nextafter __P((double, double));
+extern double remainder __P((double, double));
+#ifdef _SCALB_INT
+extern double scalb __P((double, int));
+#else
+extern double scalb __P((double, double));
+#endif
+
+extern int matherr __P((struct exception *));
+
+/*
+ * IEEE Test Vector
+ */
+extern double significand __P((double));
+
+/*
+ * Functions callable from C, intended to support IEEE arithmetic.
+ */
+extern double copysign __P((double, double));
+extern int ilogb __P((double));
+extern double rint __P((double));
+extern double scalbn __P((double, int));
+
+/*
+ * BSD math library entry points
+ */
+extern double expm1 __P((double));
+extern double log1p __P((double));
+
+/*
+ * Reentrant version of gamma & lgamma; passes signgam back by reference
+ * as the second argument; user must allocate space for signgam.
+ */
+#ifdef _REENTRANT
+extern double gamma_r __P((double, int *));
+extern double lgamma_r __P((double, int *));
+#endif  /* _REENTRANT */
+
+/* ieee style elementary functions */
+extern double __ieee754_sqrt __P((double));
+extern double __ieee754_acos __P((double));
+extern double __ieee754_acosh __P((double));
+extern double __ieee754_log __P((double));
+extern double __ieee754_atanh __P((double));
+extern double __ieee754_asin __P((double));
+extern double __ieee754_atan2 __P((double,double));
+extern double __ieee754_exp __P((double));
+extern double __ieee754_cosh __P((double));
+extern double __ieee754_fmod __P((double,double));
+extern double __ieee754_pow __P((double,double));
+extern double __ieee754_lgamma_r __P((double,int *));
+extern double __ieee754_gamma_r __P((double,int *));
+extern double __ieee754_lgamma __P((double));
+extern double __ieee754_gamma __P((double));
+extern double __ieee754_log10 __P((double));
+extern double __ieee754_sinh __P((double));
+extern double __ieee754_hypot __P((double,double));
+extern double __ieee754_j0 __P((double));
+extern double __ieee754_j1 __P((double));
+extern double __ieee754_y0 __P((double));
+extern double __ieee754_y1 __P((double));
+extern double __ieee754_jn __P((int,double));
+extern double __ieee754_yn __P((int,double));
+extern double __ieee754_remainder __P((double,double));
+extern int    __ieee754_rem_pio2 __P((double,double*));
+#ifdef _SCALB_INT
+extern double __ieee754_scalb __P((double,int));
+#else
+extern double __ieee754_scalb __P((double,double));
+#endif
+
+/* fdlibm kernel function */
+extern double __kernel_standard __P((double,double,int));
+extern double __kernel_sin __P((double,double,int));
+extern double __kernel_cos __P((double,double));
+extern double __kernel_tan __P((double,double,int));
+extern int    __kernel_rem_pio2 __P((double*,double*,int,int,int,const int*));
diff --git a/include/float.h b/include/float.h
new file mode 100644
index 0000000..2d0bf67
--- /dev/null
+++ b/include/float.h
@@ -0,0 +1,58 @@
+#ifndef __FLOAT_H
+#define __FLOAT_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define FLT_EVAL_METHOD __FLT_EVAL_METHOD__
+#define FLT_ROUNDS (__builtin_flt_rounds())
+#define FLT_RADIX __FLT_RADIX__
+
+#define FLT_MANT_DIG __FLT_MANT_DIG__
+#define DBL_MANT_DIG __DBL_MANT_DIG__
+#define LDBL_MANT_DIG __LDBL_MANT_DIG__
+
+#define DECIMAL_DIG __DECIMAL_DIG__
+
+#define FLT_DIG __FLT_DIG__
+#define DBL_DIG __DBL_DIG__
+#define LDBL_DIG __LDBL_DIG__
+
+#define FLT_MIN_EXP __FLT_MIN_EXP__
+#define DBL_MIN_EXP __DBL_MIN_EXP__
+#define LDBL_MIN_EXP __LDBL_MIN_EXP__
+
+#define FLT_MIN_10_EXP __FLT_MIN_10_EXP__
+#define DBL_MIN_10_EXP __DBL_MIN_10_EXP__
+#define LDBL_MIN_10_EXP __LDBL_MIN_10_EXP__
+
+#define FLT_MAX_EXP __FLT_MAX_EXP__
+#define DBL_MAX_EXP __DBL_MAX_EXP__
+#define LDBL_MAX_EXP __LDBL_MAX_EXP__
+
+#define FLT_MAX_10_EXP __FLT_MAX_10_EXP__
+#define DBL_MAX_10_EXP __DBL_MAX_10_EXP__
+#define LDBL_MAX_10_EXP __LDBL_MAX_10_EXP__
+
+#define FLT_MAX __FLT_MAX__
+#define DBL_MAX __DBL_MAX__
+#define LDBL_MAX __LDBL_MAX__
+
+#define FLT_EPSILON __FLT_EPSILON__
+#define DBL_EPSILON __DBL_EPSILON__
+#define LDBL_EPSILON __LDBL_EPSILON__
+
+#define FLT_MIN __FLT_MIN__
+#define DBL_MIN __DBL_MIN__
+#define LDBL_MIN __LDBL_MIN__
+
+#define FLT_TRUE_MIN __FLT_DENORM_MIN__
+#define DBL_TRUE_MIN __DBL_DENORM_MIN__
+#define LDBL_TRUE_MIN __LDBL_DENORM_MIN__
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __FLOAT_H */
diff --git a/include/csr.h b/include/generated/csr.h
similarity index 100%
rename from include/csr.h
rename to include/generated/csr.h
diff --git a/include/mem.h b/include/generated/mem.h
similarity index 100%
rename from include/mem.h
rename to include/generated/mem.h
diff --git a/include/hw/common.h b/include/hw/common.h
new file mode 100644
index 0000000..af668f7
--- /dev/null
+++ b/include/hw/common.h
@@ -0,0 +1,52 @@
+#ifndef __HW_COMMON_H
+#define __HW_COMMON_H
+
+#include <stdint.h>
+
+/* To overwrite CSR accessors, define extern, non-inlined versions
+ * of csr_read[bwl]() and csr_write[bwl](), and define
+ * CSR_ACCESSORS_DEFINED.
+ */
+
+#ifndef CSR_ACCESSORS_DEFINED
+#define CSR_ACCESSORS_DEFINED
+
+#ifdef __ASSEMBLER__
+#define MMPTR(x) x
+#else /* ! __ASSEMBLER__ */
+#define MMPTR(x) (*((volatile unsigned int *)(x)))
+
+static inline void csr_writeb(uint8_t value, uint32_t addr)
+{
+	*((volatile uint8_t *)addr) = value;
+}
+
+static inline uint8_t csr_readb(uint32_t addr)
+{
+	return *(volatile uint8_t *)addr;
+}
+
+static inline void csr_writew(uint16_t value, uint32_t addr)
+{
+	*((volatile uint16_t *)addr) = value;
+}
+
+static inline uint16_t csr_readw(uint32_t addr)
+{
+	return *(volatile uint16_t *)addr;
+}
+
+static inline void csr_writel(uint32_t value, uint32_t addr)
+{
+	*((volatile uint32_t *)addr) = value;
+}
+
+static inline uint32_t csr_readl(uint32_t addr)
+{
+	return *(volatile uint32_t *)addr;
+}
+#endif /* ! __ASSEMBLER__ */
+
+#endif /* ! CSR_ACCESSORS_DEFINED */
+
+#endif /* __HW_COMMON_H */
diff --git a/include/hw/ethmac_mem.h b/include/hw/ethmac_mem.h
new file mode 100644
index 0000000..03c7b96
--- /dev/null
+++ b/include/hw/ethmac_mem.h
@@ -0,0 +1,11 @@
+#ifndef __HW_ETHMAC_MEM_H
+#define __HW_ETHMAC_MEM_H
+
+#include <generated/mem.h>
+
+#define ETHMAC_RX0_BASE	ETHMAC_BASE
+#define ETHMAC_RX1_BASE	(ETHMAC_BASE+0x0800)
+#define ETHMAC_TX0_BASE	(ETHMAC_BASE+0x1000)
+#define ETHMAC_TX1_BASE	(ETHMAC_BASE+0x1800)
+
+#endif
diff --git a/include/hw/flags.h b/include/hw/flags.h
new file mode 100644
index 0000000..911a1b6
--- /dev/null
+++ b/include/hw/flags.h
@@ -0,0 +1,40 @@
+#ifndef __HW_FLAGS_H
+#define __HW_FLAGS_H
+
+#define UART_EV_TX	0x1
+#define UART_EV_RX	0x2
+
+#define DFII_CONTROL_SEL		0x01
+#define DFII_CONTROL_CKE		0x02
+#define DFII_CONTROL_ODT		0x04
+#define DFII_CONTROL_RESET_N	0x08
+
+#define DFII_COMMAND_CS		0x01
+#define DFII_COMMAND_WE		0x02
+#define DFII_COMMAND_CAS	0x04
+#define DFII_COMMAND_RAS	0x08
+#define DFII_COMMAND_WRDATA	0x10
+#define DFII_COMMAND_RDDATA	0x20
+
+#define ETHMAC_EV_SRAM_WRITER	0x1
+#define ETHMAC_EV_SRAM_READER	0x1
+
+#define CLKGEN_STATUS_BUSY		0x1
+#define CLKGEN_STATUS_PROGDONE	0x2
+#define CLKGEN_STATUS_LOCKED	0x4
+
+#define DVISAMPLER_TOO_LATE		0x1
+#define DVISAMPLER_TOO_EARLY	0x2
+
+#define DVISAMPLER_DELAY_MASTER_CAL	0x01
+#define DVISAMPLER_DELAY_MASTER_RST	0x02
+#define DVISAMPLER_DELAY_SLAVE_CAL	0x04
+#define DVISAMPLER_DELAY_SLAVE_RST	0x08
+#define DVISAMPLER_DELAY_INC		0x10
+#define DVISAMPLER_DELAY_DEC		0x20
+
+#define DVISAMPLER_SLOT_EMPTY	0
+#define DVISAMPLER_SLOT_LOADED	1
+#define DVISAMPLER_SLOT_PENDING	2
+
+#endif /* __HW_FLAGS_H */
diff --git a/include/id.h b/include/id.h
new file mode 100644
index 0000000..bccbd55
--- /dev/null
+++ b/include/id.h
@@ -0,0 +1,15 @@
+#ifndef __ID_H
+#define __ID_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define IDENT_SIZE 256
+void get_ident(char *ident);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __ID_H */
diff --git a/include/inet.h b/include/inet.h
new file mode 100644
index 0000000..3730747
--- /dev/null
+++ b/include/inet.h
@@ -0,0 +1,52 @@
+/* Copyright © 2005-2014 Rich Felker, et al.
+ *
+ * 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 __INET_H
+#define __INET_H
+
+#include <stdint.h>
+
+static __inline uint16_t __bswap_16(uint16_t __x)
+{
+	return (__x<<8) | (__x>>8);
+}
+
+static __inline uint32_t __bswap_32(uint32_t __x)
+{
+	return (__x>>24) | ((__x>>8)&0xff00) | ((__x<<8)&0xff0000) | (__x<<24);
+}
+
+static __inline uint64_t __bswap_64(uint64_t __x)
+{
+	return (__bswap_32(__x)+(0ULL<<32)) | __bswap_32(__x>>32);
+}
+
+#define bswap_16(x) __bswap_16(x)
+#define bswap_32(x) __bswap_32(x)
+#define bswap_64(x) __bswap_64(x)
+
+uint16_t htons(uint16_t n);
+uint32_t htonl(uint32_t n);
+uint16_t ntohs(uint16_t n);
+uint32_t ntohl(uint32_t n);
+
+#endif /* __INET_H */
diff --git a/include/inttypes.h b/include/inttypes.h
new file mode 100644
index 0000000..4afd04b
--- /dev/null
+++ b/include/inttypes.h
@@ -0,0 +1,231 @@
+/* Copyright (C) 1997-2014 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library 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
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+/*
+ *      ISO C99: 7.8 Format conversion of integer types <inttypes.h>
+ */
+
+#ifndef __INTTYPES_H
+#define __INTTYPES_H
+
+#include <stdint.h>
+
+# if __WORDSIZE == 64
+#  define __PRI64_PREFIX        "l"
+#  define __PRIPTR_PREFIX       "l"
+# else
+#  define __PRI64_PREFIX        "ll"
+#  define __PRIPTR_PREFIX
+# endif
+
+/* Macros for printing format specifiers.  */
+
+/* Decimal notation.  */
+# define PRId8          "d"
+# define PRId16         "d"
+# define PRId32         "d"
+# define PRId64         __PRI64_PREFIX "d"
+
+# define PRIdLEAST8     "d"
+# define PRIdLEAST16    "d"
+# define PRIdLEAST32    "d"
+# define PRIdLEAST64    __PRI64_PREFIX "d"
+
+# define PRIdFAST8      "d"
+# define PRIdFAST16     __PRIPTR_PREFIX "d"
+# define PRIdFAST32     __PRIPTR_PREFIX "d"
+# define PRIdFAST64     __PRI64_PREFIX "d"
+
+
+# define PRIi8          "i"
+# define PRIi16         "i"
+# define PRIi32         "i"
+# define PRIi64         __PRI64_PREFIX "i"
+
+# define PRIiLEAST8     "i"
+# define PRIiLEAST16    "i"
+# define PRIiLEAST32    "i"
+# define PRIiLEAST64    __PRI64_PREFIX "i"
+
+# define PRIiFAST8      "i"
+# define PRIiFAST16     __PRIPTR_PREFIX "i"
+# define PRIiFAST32     __PRIPTR_PREFIX "i"
+# define PRIiFAST64     __PRI64_PREFIX "i"
+
+/* Octal notation.  */
+# define PRIo8          "o"
+# define PRIo16         "o"
+# define PRIo32         "o"
+# define PRIo64         __PRI64_PREFIX "o"
+
+# define PRIoLEAST8     "o"
+# define PRIoLEAST16    "o"
+# define PRIoLEAST32    "o"
+# define PRIoLEAST64    __PRI64_PREFIX "o"
+
+# define PRIoFAST8      "o"
+# define PRIoFAST16     __PRIPTR_PREFIX "o"
+# define PRIoFAST32     __PRIPTR_PREFIX "o"
+# define PRIoFAST64     __PRI64_PREFIX "o"
+
+/* Unsigned integers.  */
+# define PRIu8          "u"
+# define PRIu16         "u"
+# define PRIu32         "u"
+# define PRIu64         __PRI64_PREFIX "u"
+
+# define PRIuLEAST8     "u"
+# define PRIuLEAST16    "u"
+# define PRIuLEAST32    "u"
+# define PRIuLEAST64    __PRI64_PREFIX "u"
+
+# define PRIuFAST8      "u"
+# define PRIuFAST16     __PRIPTR_PREFIX "u"
+# define PRIuFAST32     __PRIPTR_PREFIX "u"
+# define PRIuFAST64     __PRI64_PREFIX "u"
+
+/* lowercase hexadecimal notation.  */
+# define PRIx8          "x"
+# define PRIx16         "x"
+# define PRIx32         "x"
+# define PRIx64         __PRI64_PREFIX "x"
+
+# define PRIxLEAST8     "x"
+# define PRIxLEAST16    "x"
+# define PRIxLEAST32    "x"
+# define PRIxLEAST64    __PRI64_PREFIX "x"
+
+# define PRIxFAST8      "x"
+# define PRIxFAST16     __PRIPTR_PREFIX "x"
+# define PRIxFAST32     __PRIPTR_PREFIX "x"
+# define PRIxFAST64     __PRI64_PREFIX "x"
+
+/* UPPERCASE hexadecimal notation.  */
+# define PRIX8          "X"
+# define PRIX16         "X"
+# define PRIX32         "X"
+# define PRIX64         __PRI64_PREFIX "X"
+
+# define PRIXLEAST8     "X"
+# define PRIXLEAST16    "X"
+# define PRIXLEAST32    "X"
+# define PRIXLEAST64    __PRI64_PREFIX "X"
+
+# define PRIXFAST8      "X"
+# define PRIXFAST16     __PRIPTR_PREFIX "X"
+# define PRIXFAST32     __PRIPTR_PREFIX "X"
+# define PRIXFAST64     __PRI64_PREFIX "X"
+
+/* Macros for printing `intmax_t' and `uintmax_t'.  */
+# define PRIdMAX        __PRI64_PREFIX "d"
+# define PRIiMAX        __PRI64_PREFIX "i"
+# define PRIoMAX        __PRI64_PREFIX "o"
+# define PRIuMAX        __PRI64_PREFIX "u"
+# define PRIxMAX        __PRI64_PREFIX "x"
+# define PRIXMAX        __PRI64_PREFIX "X"
+
+
+/* Macros for printing `intptr_t' and `uintptr_t'.  */
+# define PRIdPTR        __PRIPTR_PREFIX "d"
+# define PRIiPTR        __PRIPTR_PREFIX "i"
+# define PRIoPTR        __PRIPTR_PREFIX "o"
+# define PRIuPTR        __PRIPTR_PREFIX "u"
+# define PRIxPTR        __PRIPTR_PREFIX "x"
+# define PRIXPTR        __PRIPTR_PREFIX "X"
+
+/* Macros for scanning format specifiers.  */
+
+/* Signed decimal notation.  */
+# define SCNd8          "hhd"
+# define SCNd16         "hd"
+# define SCNd32         "d"
+# define SCNd64         __PRI64_PREFIX "d"
+
+# define SCNdLEAST8     "hhd"
+# define SCNdLEAST16    "hd"
+# define SCNdLEAST32    "d"
+# define SCNdLEAST64    __PRI64_PREFIX "d"
+
+# define SCNdFAST8      "hhd"
+# define SCNdFAST16     __PRIPTR_PREFIX "d"
+# define SCNdFAST32     __PRIPTR_PREFIX "d"
+# define SCNdFAST64     __PRI64_PREFIX "d"
+
+/* Unsigned decimal notation.  */
+# define SCNu8          "hhu"
+# define SCNu16         "hu"
+# define SCNu32         "u"
+# define SCNu64         __PRI64_PREFIX "u"
+
+# define SCNuLEAST8     "hhu"
+# define SCNuLEAST16    "hu"
+# define SCNuLEAST32    "u"
+# define SCNuLEAST64    __PRI64_PREFIX "u"
+
+# define SCNuFAST8      "hhu"
+# define SCNuFAST16     __PRIPTR_PREFIX "u"
+# define SCNuFAST32     __PRIPTR_PREFIX "u"
+# define SCNuFAST64     __PRI64_PREFIX "u"
+
+/* Octal notation.  */
+# define SCNo8          "hho"
+# define SCNo16         "ho"
+# define SCNo32         "o"
+# define SCNo64         __PRI64_PREFIX "o"
+
+# define SCNoLEAST8     "hho"
+# define SCNoLEAST16    "ho"
+# define SCNoLEAST32    "o"
+# define SCNoLEAST64    __PRI64_PREFIX "o"
+
+# define SCNoFAST8      "hho"
+# define SCNoFAST16     __PRIPTR_PREFIX "o"
+# define SCNoFAST32     __PRIPTR_PREFIX "o"
+# define SCNoFAST64     __PRI64_PREFIX "o"
+
+/* Hexadecimal notation.  */
+# define SCNx8          "hhx"
+# define SCNx16         "hx"
+# define SCNx32         "x"
+# define SCNx64         __PRI64_PREFIX "x"
+
+# define SCNxLEAST8     "hhx"
+# define SCNxLEAST16    "hx"
+# define SCNxLEAST32    "x"
+# define SCNxLEAST64    __PRI64_PREFIX "x"
+
+# define SCNxFAST8      "hhx"
+# define SCNxFAST16     __PRIPTR_PREFIX "x"
+# define SCNxFAST32     __PRIPTR_PREFIX "x"
+# define SCNxFAST64     __PRI64_PREFIX "x"
+
+
+/* Macros for scanning `intmax_t' and `uintmax_t'.  */
+# define SCNdMAX        __PRI64_PREFIX "d"
+# define SCNiMAX        __PRI64_PREFIX "i"
+# define SCNoMAX        __PRI64_PREFIX "o"
+# define SCNuMAX        __PRI64_PREFIX "u"
+# define SCNxMAX        __PRI64_PREFIX "x"
+
+/* Macros for scaning `intptr_t' and `uintptr_t'.  */
+# define SCNdPTR        __PRIPTR_PREFIX "d"
+# define SCNiPTR        __PRIPTR_PREFIX "i"
+# define SCNoPTR        __PRIPTR_PREFIX "o"
+# define SCNuPTR        __PRIPTR_PREFIX "u"
+# define SCNxPTR        __PRIPTR_PREFIX "x"
+
+#endif /* __INTTYPES_H */
diff --git a/include/irq.h b/include/irq.h
new file mode 100644
index 0000000..19f00b1
--- /dev/null
+++ b/include/irq.h
@@ -0,0 +1,144 @@
+#ifndef __IRQ_H
+#define __IRQ_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <system.h>
+
+#ifdef __picorv32__
+// PicoRV32 has a very limited interrupt support, implemented via custom
+// instructions. It also doesn't have a global interrupt enable/disable, so
+// we have to emulate it via saving and restoring a mask and using 0/~1 as a
+// hardware mask.
+// Due to all this somewhat low-level mess, all of the glue is implemented in
+// the RiscV crt0, and this header is kept as a thin wrapper. Since interrupts
+// managed by this layer, do not call interrupt instructions directly, as the
+// state will go out of sync with the hardware.
+
+// Read only.
+extern unsigned int _irq_pending;
+// Read only.
+extern unsigned int _irq_mask;
+// Read only.
+extern unsigned int _irq_enabled;
+extern void _irq_enable(void);
+extern void _irq_disable(void);
+extern void _irq_setmask(unsigned int);
+#endif
+
+static inline unsigned int irq_getie(void)
+{
+#if defined (__lm32__)
+	unsigned int ie;
+	__asm__ __volatile__("rcsr %0, IE" : "=r" (ie));
+	return ie;
+#elif defined (__or1k__)
+	return !!(mfspr(SPR_SR) & SPR_SR_IEE);
+#elif defined (__picorv32__)
+	return _irq_enabled != 0;
+#elif defined (__vexriscv__)
+	return (csrr(mstatus) & CSR_MSTATUS_MIE) != 0;
+#elif defined (__minerva__)
+	return (csrr(mstatus) & CSR_MSTATUS_MIE) != 0;
+#else
+#error Unsupported architecture
+#endif
+}
+
+static inline void irq_setie(unsigned int ie)
+{
+#if defined (__lm32__)
+	__asm__ __volatile__("wcsr IE, %0" : : "r" (ie));
+#elif defined (__or1k__)
+	if (ie & 0x1)
+		mtspr(SPR_SR, mfspr(SPR_SR) | SPR_SR_IEE);
+	else
+		mtspr(SPR_SR, mfspr(SPR_SR) & ~SPR_SR_IEE);
+#elif defined (__picorv32__)
+    if (ie & 0x1)
+        _irq_enable();
+    else
+        _irq_disable();
+#elif defined (__vexriscv__)
+	if(ie) csrs(mstatus,CSR_MSTATUS_MIE); else csrc(mstatus,CSR_MSTATUS_MIE);
+#elif defined (__minerva__)
+	if(ie) csrs(mstatus,CSR_MSTATUS_MIE); else csrc(mstatus,CSR_MSTATUS_MIE);
+#else
+#error Unsupported architecture
+#endif
+}
+
+static inline unsigned int irq_getmask(void)
+{
+#if defined (__lm32__)
+	unsigned int mask;
+	__asm__ __volatile__("rcsr %0, IM" : "=r" (mask));
+	return mask;
+#elif defined (__or1k__)
+	return mfspr(SPR_PICMR);
+#elif defined (__picorv32__)
+    // PicoRV32 interrupt mask bits are high-disabled. This is the inverse of how
+    // LiteX sees things.
+    return ~_irq_mask;
+#elif defined (__vexriscv__)
+	unsigned int mask;
+	asm volatile ("csrr %0, %1" : "=r"(mask) : "i"(CSR_IRQ_MASK));
+	return mask;
+#elif defined (__minerva__)
+	unsigned int mask;
+	asm volatile ("csrr %0, %1" : "=r"(mask) : "i"(CSR_IRQ_MASK));
+	return mask;
+#else
+#error Unsupported architecture
+#endif
+}
+
+static inline void irq_setmask(unsigned int mask)
+{
+#if defined (__lm32__)
+	__asm__ __volatile__("wcsr IM, %0" : : "r" (mask));
+#elif defined (__or1k__)
+	mtspr(SPR_PICMR, mask);
+#elif defined (__picorv32__)
+    // PicoRV32 interrupt mask bits are high-disabled. This is the inverse of how
+    // LiteX sees things.
+    _irq_setmask(~mask);
+#elif defined (__vexriscv__)
+	asm volatile ("csrw %0, %1" :: "i"(CSR_IRQ_MASK), "r"(mask));
+#elif defined (__minerva__)
+	asm volatile ("csrw %0, %1" :: "i"(CSR_IRQ_MASK), "r"(mask));
+#else
+#error Unsupported architecture
+#endif
+}
+
+static inline unsigned int irq_pending(void)
+{
+#if defined (__lm32__)
+	unsigned int pending;
+	__asm__ __volatile__("rcsr %0, IP" : "=r" (pending));
+	return pending;
+#elif defined (__or1k__)
+	return mfspr(SPR_PICSR);
+#elif defined (__picorv32__)
+	return _irq_pending;
+#elif defined (__vexriscv__)
+	unsigned int pending;
+	asm volatile ("csrr %0, %1" : "=r"(pending) : "i"(CSR_IRQ_PENDING));
+	return pending;
+#elif defined (__minerva__)
+	unsigned int pending;
+	asm volatile ("csrr %0, %1" : "=r"(pending) : "i"(CSR_IRQ_PENDING));
+	return pending;
+#else
+#error Unsupported architecture
+#endif
+}
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __IRQ_H */
diff --git a/include/limits.h b/include/limits.h
new file mode 100644
index 0000000..49ac6ff
--- /dev/null
+++ b/include/limits.h
@@ -0,0 +1,26 @@
+#ifndef __LIMITS_H
+#define __LIMITS_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define ULONG_MAX 0xffffffff
+
+#define UINT_MAX 0xffffffff
+#define INT_MIN 0x80000000
+#define INT_MAX 0x7fffffff
+
+#define USHRT_MAX 0xffff
+#define SHRT_MIN 0x8000
+#define SHRT_MAX 0x7fff
+
+#define UCHAR_MAX 0xff
+
+#define CHAR_BIT 8
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __LIMITS_H */
diff --git a/include/math.h b/include/math.h
new file mode 100644
index 0000000..aef49d9
--- /dev/null
+++ b/include/math.h
@@ -0,0 +1,14 @@
+#ifndef __MATH_H
+#define __MATH_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <fdlibm/fdlibm.h>
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __MATH_H */
diff --git a/include/pthread.h b/include/pthread.h
new file mode 100644
index 0000000..b78aa1e
--- /dev/null
+++ b/include/pthread.h
@@ -0,0 +1,27 @@
+#ifndef __PTHREAD_H
+#define __PTHREAD_H
+
+typedef int pthread_rwlock_t;
+
+#define PTHREAD_RWLOCK_INITIALIZER 0
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+inline int pthread_rwlock_rdlock(pthread_rwlock_t *rwlock)
+  { return 0; }
+inline int pthread_rwlock_tryrdlock(pthread_rwlock_t *rwlock)
+  { return 0; }
+inline int pthread_rwlock_wrlock(pthread_rwlock_t *rwlock)
+  { return 0; }
+inline int pthread_rwlock_trywrlock(pthread_rwlock_t *rwlock)
+  { return 0; }
+int pthread_rwlock_unlock(pthread_rwlock_t *rwlock)
+  { return 0; }
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __PTHREAD_H */
diff --git a/include/spiflash.h b/include/spiflash.h
new file mode 100644
index 0000000..a4ff495
--- /dev/null
+++ b/include/spiflash.h
@@ -0,0 +1,8 @@
+#ifndef __SPIFLASH_H
+#define __SPIFLASH_H
+
+void write_to_flash_page(unsigned int addr, const unsigned char *c, unsigned int len);
+void erase_flash_sector(unsigned int addr);
+void write_to_flash(unsigned int addr, const unsigned char *c, unsigned int len);
+
+#endif /* __SPIFLASH_H */
diff --git a/include/spr-defs.h b/include/spr-defs.h
new file mode 100644
index 0000000..e073a50
--- /dev/null
+++ b/include/spr-defs.h
@@ -0,0 +1,696 @@
+/* spr-defs.h - Special purpose registers definitions file
+	
+   Copyright (C) 2000 Damjan Lampret
+   Copyright (C) 2008, 2010 Embecosm Limited
+   
+   Contributor Damjan Lampret <lampret@opencores.org>
+   Contributor Jeremy Bennett <jeremy.bennett@embecosm.com>
+
+   This program 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 (at your option)
+   any later version.
+
+   This program 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 this program.  If not, see <http:  www.gnu.org/licenses/>.  */
+
+/* ----------------------------------------------------------------------------
+   This code is commented throughout for use with Doxygen.
+   --------------------------------------------------------------------------*/
+#ifndef SPR_DEFS__H
+#define SPR_DEFS__H
+
+/* Definition of special-purpose registers (SPRs). */
+
+#define MAX_GRPS (32)
+#define MAX_SPRS_PER_GRP_BITS (11)
+#define MAX_SPRS_PER_GRP (1 << MAX_SPRS_PER_GRP_BITS)
+#define MAX_SPRS (0x10000)
+
+/* Base addresses for the groups */
+#define SPRGROUP_SYS	(0<< MAX_SPRS_PER_GRP_BITS)
+#define SPRGROUP_DMMU	(1<< MAX_SPRS_PER_GRP_BITS)
+#define SPRGROUP_IMMU	(2<< MAX_SPRS_PER_GRP_BITS)
+#define SPRGROUP_DC	(3<< MAX_SPRS_PER_GRP_BITS)
+#define SPRGROUP_IC	(4<< MAX_SPRS_PER_GRP_BITS)
+#define SPRGROUP_MAC	(5<< MAX_SPRS_PER_GRP_BITS)
+#define SPRGROUP_D	(6<< MAX_SPRS_PER_GRP_BITS)
+#define SPRGROUP_PC	(7<< MAX_SPRS_PER_GRP_BITS)
+#define SPRGROUP_PM	(8<< MAX_SPRS_PER_GRP_BITS)
+#define SPRGROUP_PIC	(9<< MAX_SPRS_PER_GRP_BITS)
+#define SPRGROUP_TT	(10<< MAX_SPRS_PER_GRP_BITS)
+#define SPRGROUP_FP	(11<< MAX_SPRS_PER_GRP_BITS)
+
+/* System control and status group */
+#define SPR_VR		(SPRGROUP_SYS + 0)
+#define SPR_UPR		(SPRGROUP_SYS + 1)
+#define SPR_CPUCFGR	(SPRGROUP_SYS + 2)
+#define SPR_DMMUCFGR	(SPRGROUP_SYS + 3)
+#define SPR_IMMUCFGR	(SPRGROUP_SYS + 4)
+#define SPR_DCCFGR	(SPRGROUP_SYS + 5)
+#define SPR_ICCFGR	(SPRGROUP_SYS + 6)
+#define SPR_DCFGR	(SPRGROUP_SYS + 7)
+#define SPR_PCCFGR	(SPRGROUP_SYS + 8)
+#define SPR_VR2 	(SPRGROUP_SYS + 9)
+#define SPR_AVR 	(SPRGROUP_SYS + 10)
+#define SPR_EVBAR 	(SPRGROUP_SYS + 11)
+#define SPR_AECR 	(SPRGROUP_SYS + 12)
+#define SPR_AESR 	(SPRGROUP_SYS + 13)
+#define SPR_NPC         (SPRGROUP_SYS + 16)  /* CZ 21/06/01 */
+#define SPR_SR		(SPRGROUP_SYS + 17)  /* CZ 21/06/01 */
+#define SPR_PPC         (SPRGROUP_SYS + 18)  /* CZ 21/06/01 */
+#define SPR_FPCSR       (SPRGROUP_SYS + 20)  /* CZ 21/06/01 */
+#define SPR_ISR_BASE    (SPRGROUP_SYS + 21)
+#define SPR_EPCR_BASE	(SPRGROUP_SYS + 32)  /* CZ 21/06/01 */
+#define SPR_EPCR_LAST	(SPRGROUP_SYS + 47)  /* CZ 21/06/01 */
+#define SPR_EEAR_BASE	(SPRGROUP_SYS + 48)
+#define SPR_EEAR_LAST	(SPRGROUP_SYS + 63)
+#define SPR_ESR_BASE	(SPRGROUP_SYS + 64)
+#define SPR_ESR_LAST	(SPRGROUP_SYS + 79)
+#define SPR_GPR_BASE	(SPRGROUP_SYS + 1024)
+
+/* Data MMU group */
+#define SPR_DMMUCR	(SPRGROUP_DMMU + 0)
+#define SPR_DTLBEIR     (SPRGROUP_DMMU + 2)
+#define SPR_DTLBMR_BASE(WAY)	(SPRGROUP_DMMU + 0x200 + (WAY) * 0x100)
+#define SPR_DTLBMR_LAST(WAY)	(SPRGROUP_DMMU + 0x27f + (WAY) * 0x100)
+#define SPR_DTLBTR_BASE(WAY)	(SPRGROUP_DMMU + 0x280 + (WAY) * 0x100)
+#define SPR_DTLBTR_LAST(WAY)	(SPRGROUP_DMMU + 0x2ff + (WAY) * 0x100)
+
+/* Instruction MMU group */
+#define SPR_IMMUCR	(SPRGROUP_IMMU + 0)
+#define SPR_ITLBEIR     (SPRGROUP_IMMU + 2)
+#define SPR_ITLBMR_BASE(WAY)	(SPRGROUP_IMMU + 0x200 + (WAY) * 0x100)
+#define SPR_ITLBMR_LAST(WAY)	(SPRGROUP_IMMU + 0x27f + (WAY) * 0x100)
+#define SPR_ITLBTR_BASE(WAY)	(SPRGROUP_IMMU + 0x280 + (WAY) * 0x100)
+#define SPR_ITLBTR_LAST(WAY)	(SPRGROUP_IMMU + 0x2ff + (WAY) * 0x100)
+
+/* Data cache group */
+#define SPR_DCCR	(SPRGROUP_DC + 0)
+#define SPR_DCBPR	(SPRGROUP_DC + 1)
+#define SPR_DCBFR	(SPRGROUP_DC + 2)
+#define SPR_DCBIR	(SPRGROUP_DC + 3)
+#define SPR_DCBWR	(SPRGROUP_DC + 4)
+#define SPR_DCBLR	(SPRGROUP_DC + 5)
+#define SPR_DCR_BASE(WAY)	(SPRGROUP_DC + 0x200 + (WAY) * 0x200)
+#define SPR_DCR_LAST(WAY)	(SPRGROUP_DC + 0x3ff + (WAY) * 0x200)
+
+/* Instruction cache group */
+#define SPR_ICCR	(SPRGROUP_IC + 0)
+#define SPR_ICBPR	(SPRGROUP_IC + 1)
+#define SPR_ICBIR	(SPRGROUP_IC + 2)
+#define SPR_ICBLR	(SPRGROUP_IC + 3)
+#define SPR_ICR_BASE(WAY)	(SPRGROUP_IC + 0x200 + (WAY) * 0x200)
+#define SPR_ICR_LAST(WAY)	(SPRGROUP_IC + 0x3ff + (WAY) * 0x200)
+
+/* MAC group */
+#define SPR_MACLO 	(SPRGROUP_MAC + 1)
+#define SPR_MACHI 	(SPRGROUP_MAC + 2)
+
+/* Debug group */
+#define SPR_DVR(N)	(SPRGROUP_D + (N))
+#define SPR_DCR(N)	(SPRGROUP_D + 8 + (N))
+#define SPR_DMR1	(SPRGROUP_D + 16)
+#define SPR_DMR2	(SPRGROUP_D + 17)
+#define SPR_DWCR0	(SPRGROUP_D + 18)
+#define SPR_DWCR1	(SPRGROUP_D + 19)
+#define SPR_DSR		(SPRGROUP_D + 20)
+#define SPR_DRR		(SPRGROUP_D + 21)
+
+/* Performance counters group */
+#define SPR_PCCR(N)	(SPRGROUP_PC + (N))
+#define SPR_PCMR(N)	(SPRGROUP_PC + 8 + (N))
+
+/* Power management group */
+#define SPR_PMR (SPRGROUP_PM + 0)
+
+/* PIC group */
+#define SPR_PICMR (SPRGROUP_PIC + 0)
+#define SPR_PICPR (SPRGROUP_PIC + 1)
+#define SPR_PICSR (SPRGROUP_PIC + 2)
+
+/* Tick Timer group */
+#define SPR_TTMR (SPRGROUP_TT + 0)
+#define SPR_TTCR (SPRGROUP_TT + 1)
+
+/*
+ * Bit definitions for the Version Register
+ *
+ */
+#define SPR_VR_VER	0xff000000  /* Processor version */
+#define SPR_VR_CFG	0x00ff0000  /* Processor configuration */
+#define SPR_VR_RES	0x0000ff80  /* Reserved */
+#define SPR_VR_UVRP	0x00000040  /* Updated version register present */
+#define SPR_VR_REV	0x0000003f  /* Processor revision */
+
+#define SPR_VR_VER_OFF	24
+#define SPR_VR_CFG_OFF	16
+#define SPR_VR_UVRP_OFF	6
+#define SPR_VR_REV_OFF	0
+
+/*
+ * Bit definitions for the Unit Present Register
+ *
+ */
+#define SPR_UPR_UP	   0x00000001  /* UPR present */
+#define SPR_UPR_DCP	   0x00000002  /* Data cache present */
+#define SPR_UPR_ICP	   0x00000004  /* Instruction cache present */
+#define SPR_UPR_DMP	   0x00000008  /* Data MMU present */
+#define SPR_UPR_IMP	   0x00000010  /* Instruction MMU present */
+#define SPR_UPR_MP	   0x00000020  /* MAC present */
+#define SPR_UPR_DUP	   0x00000040  /* Debug unit present */
+#define SPR_UPR_PCUP	   0x00000080  /* Performance counters unit present */
+#define SPR_UPR_PMP	   0x00000100  /* Power management present */
+#define SPR_UPR_PICP	   0x00000200  /* PIC present */
+#define SPR_UPR_TTP	   0x00000400  /* Tick timer present */
+#define SPR_UPR_RES	   0x00fe0000  /* Reserved */
+#define SPR_UPR_CUP	   0xff000000  /* Context units present */
+
+/*
+ * JPB: Bit definitions for the CPU configuration register
+ *
+ */
+#define SPR_CPUCFGR_NSGF   0x0000000f  /* Number of shadow GPR files */
+#define SPR_CPUCFGR_CGF	   0x00000010  /* Custom GPR file */
+#define SPR_CPUCFGR_OB32S  0x00000020  /* ORBIS32 supported */
+#define SPR_CPUCFGR_OB64S  0x00000040  /* ORBIS64 supported */
+#define SPR_CPUCFGR_OF32S  0x00000080  /* ORFPX32 supported */
+#define SPR_CPUCFGR_OF64S  0x00000100  /* ORFPX64 supported */
+#define SPR_CPUCFGR_OV64S  0x00000200  /* ORVDX64 supported */
+#define SPR_CPUCFGR_ND     0x00000400  /* No delay-slot */
+#define SPR_CPUCFGR_AVRP   0x00000800  /* Architecture version register present */
+#define SPR_CPUCFGR_EVBARP 0x00001000  /* Exception vector base address register 
+					  present */
+#define SPR_CPUCFGR_ISRP   0x00002000  /* Implementation-specific registers present */
+#define SPR_CPUCFGR_AECSRP 0x00004000  /* Arithmetic exception control/status 
+					  registers present */
+#define SPR_CPUCFGR_RES	   0xffff8000  /* Reserved */
+
+/*
+ * Bit definitions for the Version Register 2
+ *
+ */
+#define SPR_VR2_CPUID   0xff000000  /* Unique CPU identifier */
+#define SPR_VR2_VER	0x00ffffff  /* Version */
+
+#define SPR_VR2_CPUID_OFF   24
+#define SPR_VR2_VER_OFF     0
+
+#define SPR_VR2_CPUID_OR1KSIM   0x00
+#define SPR_VR2_CPUID_MOR1KX    0x01
+#define SPR_VR2_CPUID_OR1200    0x12
+#define SPR_VR2_CPUID_ALTOR32   0x32
+#define SPR_VR2_CPUID_OR10      0x10
+
+
+/*
+ * Bit definitions for the Architecture Version register
+ *
+ */
+#define SPR_AVR_MAJ     0xff000000  /* Major architecture version number */
+#define SPR_AVR_MIN     0x00ff0000  /* Minor architecture version number */
+#define SPR_AVR_REV     0x0000ff00  /* Architecture revision number */
+#define SPR_AVR_RES	0x000000ff  /* Reserved */
+
+#define SPR_AVR_MAJ_OFF 24
+#define SPR_AVR_MIN_OFF 16
+#define SPR_AVR_REV_OFF 8
+
+/*
+ * Bit definitions for the Exception Base Address register
+ *
+ */
+#define SPR_EVBAR_EVBA  0xffffe000  /* Exception vector base address */
+#define SPR_EVBAR_RES   0x00001fff  /* Reserved */
+
+#define SPR_EVBAR_EVBA_OFF 13
+
+/*
+ * Bit definitions for the Arithmetic Exception Control register
+ *
+ */
+#define SPR_AECR_CYADDE  0x00000001  /* Carry on add/subtract exception */
+#define SPR_AECR_OVADDE  0x00000002  /* Overflow on add/subtract exception */
+#define SPR_AECR_CYMULE  0x00000004  /* Carry on multiply exception */
+#define SPR_AECR_OVMULE  0x00000008  /* Overflow on multiply exception */
+#define SPR_AECR_DBZE    0x00000010  /* Divide by zero exception */
+#define SPR_AECR_CYMACADDE  0x00000020  /* Carry on MAC add/subtract exception */
+#define SPR_AECR_OVMACADDE  0x00000040  /* Overflow on MAC add/subtract exception */
+
+#define SPR_AECR_CYADDE_OFF 0
+#define SPR_AECR_OVADDE_OFF 1
+#define SPR_AECR_CYMULE_OFF 2
+#define SPR_AECR_OVMULE_OFF 3
+#define SPR_AECR_DBZE_OFF   4
+#define SPR_AECR_CYMACADDE_OFF 5
+#define SPR_AECR_OVMACADDE_OFF 6
+
+
+/*
+ * Bit definitions for the Arithmetic Exception Status register
+ *
+ */
+#define SPR_AESR_CYADDE  0x00000001  /* Carry on add/subtract exception */
+#define SPR_AESR_OVADDE  0x00000002  /* Overflow on add/subtract exception */
+#define SPR_AESR_CYMULE  0x00000004  /* Carry on multiply exception */
+#define SPR_AESR_OVMULE  0x00000008  /* Overflow on multiply exception */
+#define SPR_AESR_DBZE    0x00000010  /* Divide by zero exception */
+#define SPR_AESR_CYMACADDE  0x00000020  /* Carry on MAC add/subtract exception */
+#define SPR_AESR_OVMACADDE  0x00000040  /* Overflow on MAC add/subtract exception */
+
+#define SPR_AESR_CYADDE_OFF 0
+#define SPR_AESR_OVADDE_OFF 1
+#define SPR_AESR_CYMULE_OFF 2
+#define SPR_AESR_OVMULE_OFF 3
+#define SPR_AESR_DBZE_OFF   4
+#define SPR_AESR_CYMACADDE_OFF 5
+#define SPR_AESR_OVMACADDE_OFF 6
+
+/*
+ * JPB: Bit definitions for the Debug configuration register and other
+ * constants.
+ *
+ */
+
+#define SPR_DCFGR_NDP      0x00000007  /* Number of matchpoints mask */
+#define SPR_DCFGR_NDP1     0x00000000  /* One matchpoint supported */
+#define SPR_DCFGR_NDP2     0x00000001  /* Two matchpoints supported */
+#define SPR_DCFGR_NDP3     0x00000002  /* Three matchpoints supported */
+#define SPR_DCFGR_NDP4     0x00000003  /* Four matchpoints supported */
+#define SPR_DCFGR_NDP5     0x00000004  /* Five matchpoints supported */
+#define SPR_DCFGR_NDP6     0x00000005  /* Six matchpoints supported */
+#define SPR_DCFGR_NDP7     0x00000006  /* Seven matchpoints supported */
+#define SPR_DCFGR_NDP8     0x00000007  /* Eight matchpoints supported */
+#define SPR_DCFGR_WPCI     0x00000008  /* Watchpoint counters implemented */
+
+#define MATCHPOINTS_TO_NDP(n) (1 == n ? SPR_DCFGR_NDP1 : \
+                               2 == n ? SPR_DCFGR_NDP2 : \
+                               3 == n ? SPR_DCFGR_NDP3 : \
+                               4 == n ? SPR_DCFGR_NDP4 : \
+                               5 == n ? SPR_DCFGR_NDP5 : \
+                               6 == n ? SPR_DCFGR_NDP6 : \
+                               7 == n ? SPR_DCFGR_NDP7 : SPR_DCFGR_NDP8)
+#define MAX_MATCHPOINTS  8
+#define MAX_WATCHPOINTS  (MAX_MATCHPOINTS + 2)
+
+/*
+ * Bit definitions for the Supervision Register
+ *
+ */
+#define SPR_SR_SM          0x00000001  /* Supervisor Mode */
+#define SPR_SR_TEE         0x00000002  /* Tick timer Exception Enable */
+#define SPR_SR_IEE         0x00000004  /* Interrupt Exception Enable */
+#define SPR_SR_DCE         0x00000008  /* Data Cache Enable */
+#define SPR_SR_ICE         0x00000010  /* Instruction Cache Enable */
+#define SPR_SR_DME         0x00000020  /* Data MMU Enable */
+#define SPR_SR_IME         0x00000040  /* Instruction MMU Enable */
+#define SPR_SR_LEE         0x00000080  /* Little Endian Enable */
+#define SPR_SR_CE          0x00000100  /* CID Enable */
+#define SPR_SR_F           0x00000200  /* Condition Flag */
+#define SPR_SR_CY          0x00000400  /* Carry flag */
+#define SPR_SR_OV          0x00000800  /* Overflow flag */
+#define SPR_SR_OVE         0x00001000  /* Overflow flag Exception */
+#define SPR_SR_DSX         0x00002000  /* Delay Slot Exception */
+#define SPR_SR_EPH         0x00004000  /* Exception Prefix High */
+#define SPR_SR_FO          0x00008000  /* Fixed one */
+#define SPR_SR_SUMRA       0x00010000  /* Supervisor SPR read access */
+#define SPR_SR_RES         0x0ffe0000  /* Reserved */
+#define SPR_SR_CID         0xf0000000  /* Context ID */
+
+/*
+ * Bit definitions for the Data MMU Control Register
+ *
+ */
+#define SPR_DMMUCR_P2S	   0x0000003e  /* Level 2 Page Size */
+#define SPR_DMMUCR_P1S	   0x000007c0  /* Level 1 Page Size */
+#define SPR_DMMUCR_VADDR_WIDTH	0x0000f800  /* Virtual ADDR Width */
+#define SPR_DMMUCR_PADDR_WIDTH	0x000f0000  /* Physical ADDR Width */
+
+/*
+ * Bit definitions for the Instruction MMU Control Register
+ *
+ */
+#define SPR_IMMUCR_P2S	   0x0000003e  /* Level 2 Page Size */
+#define SPR_IMMUCR_P1S	   0x000007c0  /* Level 1 Page Size */
+#define SPR_IMMUCR_VADDR_WIDTH	0x0000f800  /* Virtual ADDR Width */
+#define SPR_IMMUCR_PADDR_WIDTH	0x000f0000  /* Physical ADDR Width */
+
+/*
+ * Bit definitions for the Data TLB Match Register
+ *
+ */
+#define SPR_DTLBMR_V	   0x00000001  /* Valid */
+#define SPR_DTLBMR_PL1	   0x00000002  /* Page Level 1 (if 0 then PL2) */
+#define SPR_DTLBMR_CID	   0x0000003c  /* Context ID */
+#define SPR_DTLBMR_LRU	   0x000000c0  /* Least Recently Used */
+#define SPR_DTLBMR_VPN	   0xffffe000  /* Virtual Page Number */
+
+/*
+ * Bit definitions for the Data TLB Translate Register
+ *
+ */
+#define SPR_DTLBTR_CC	   0x00000001  /* Cache Coherency */
+#define SPR_DTLBTR_CI	   0x00000002  /* Cache Inhibit */
+#define SPR_DTLBTR_WBC	   0x00000004  /* Write-Back Cache */
+#define SPR_DTLBTR_WOM	   0x00000008  /* Weakly-Ordered Memory */
+#define SPR_DTLBTR_A	   0x00000010  /* Accessed */
+#define SPR_DTLBTR_D	   0x00000020  /* Dirty */
+#define SPR_DTLBTR_URE	   0x00000040  /* User Read Enable */
+#define SPR_DTLBTR_UWE	   0x00000080  /* User Write Enable */
+#define SPR_DTLBTR_SRE	   0x00000100  /* Supervisor Read Enable */
+#define SPR_DTLBTR_SWE	   0x00000200  /* Supervisor Write Enable */
+#define SPR_DTLBTR_PPN	   0xffffe000  /* Physical Page Number */
+
+#define DTLB_PR_NOLIMIT  ( SPR_DTLBTR_URE  | \
+			   SPR_DTLBTR_UWE  | \
+			   SPR_DTLBTR_SRE  | \
+			   SPR_DTLBTR_SWE  )
+
+/*
+ * Bit definitions for the Instruction TLB Match Register
+ *
+ */
+#define SPR_ITLBMR_V	   0x00000001  /* Valid */
+#define SPR_ITLBMR_PL1	   0x00000002  /* Page Level 1 (if 0 then PL2) */
+#define SPR_ITLBMR_CID	   0x0000003c  /* Context ID */
+#define SPR_ITLBMR_LRU	   0x000000c0  /* Least Recently Used */
+#define SPR_ITLBMR_VPN	   0xffffe000  /* Virtual Page Number */
+
+/*
+ * Bit definitions for the Instruction TLB Translate Register
+ *
+ */
+#define SPR_ITLBTR_CC	   0x00000001  /* Cache Coherency */
+#define SPR_ITLBTR_CI	   0x00000002  /* Cache Inhibit */
+#define SPR_ITLBTR_WBC	   0x00000004  /* Write-Back Cache */
+#define SPR_ITLBTR_WOM	   0x00000008  /* Weakly-Ordered Memory */
+#define SPR_ITLBTR_A	   0x00000010  /* Accessed */
+#define SPR_ITLBTR_D	   0x00000020  /* Dirty */
+#define SPR_ITLBTR_SXE	   0x00000040  /* User Read Enable */
+#define SPR_ITLBTR_UXE	   0x00000080  /* User Write Enable */
+#define SPR_ITLBTR_PPN	   0xffffe000  /* Physical Page Number */
+
+#define ITLB_PR_NOLIMIT  ( SPR_ITLBTR_SXE  |	\
+			   SPR_ITLBTR_UXE  )
+
+
+/*
+ * Bit definitions for Data Cache Control register
+ *
+ */
+#define SPR_DCCR_EW	   0x000000ff  /* Enable ways */
+
+/*
+ * Bit definitions for Insn Cache Control register
+ *
+ */
+#define SPR_ICCR_EW	   0x000000ff  /* Enable ways */
+
+/*
+ * Bit definitions for Data Cache Configuration Register
+ *
+ */
+
+#define SPR_DCCFGR_NCW		0x00000007
+#define SPR_DCCFGR_NCS		0x00000078
+#define SPR_DCCFGR_CBS		0x00000080
+#define SPR_DCCFGR_CWS		0x00000100
+#define SPR_DCCFGR_CCRI		0x00000200
+#define SPR_DCCFGR_CBIRI	0x00000400
+#define SPR_DCCFGR_CBPRI	0x00000800
+#define SPR_DCCFGR_CBLRI	0x00001000
+#define SPR_DCCFGR_CBFRI	0x00002000
+#define SPR_DCCFGR_CBWBRI	0x00004000
+
+#define SPR_DCCFGR_NCW_OFF      0
+#define SPR_DCCFGR_NCS_OFF      3
+#define SPR_DCCFGR_CBS_OFF	7
+
+/*
+ * Bit definitions for Instruction Cache Configuration Register
+ *
+ */
+#define SPR_ICCFGR_NCW		0x00000007
+#define SPR_ICCFGR_NCS		0x00000078
+#define SPR_ICCFGR_CBS		0x00000080
+#define SPR_ICCFGR_CCRI		0x00000200
+#define SPR_ICCFGR_CBIRI	0x00000400
+#define SPR_ICCFGR_CBPRI	0x00000800
+#define SPR_ICCFGR_CBLRI	0x00001000
+
+#define SPR_ICCFGR_NCW_OFF      0
+#define SPR_ICCFGR_NCS_OFF      3
+#define SPR_ICCFGR_CBS_OFF	7
+
+/*
+ * Bit definitions for Data MMU Configuration Register
+ *
+ */
+
+#define SPR_DMMUCFGR_NTW	0x00000003
+#define SPR_DMMUCFGR_NTS	0x0000001C
+#define SPR_DMMUCFGR_NAE	0x000000E0
+#define SPR_DMMUCFGR_CRI	0x00000100
+#define SPR_DMMUCFGR_PRI        0x00000200
+#define SPR_DMMUCFGR_TEIRI	0x00000400
+#define SPR_DMMUCFGR_HTR	0x00000800
+
+#define SPR_DMMUCFGR_NTW_OFF	0
+#define SPR_DMMUCFGR_NTS_OFF	2
+
+/*
+ * Bit definitions for Instruction MMU Configuration Register
+ *
+ */
+
+#define SPR_IMMUCFGR_NTW	0x00000003
+#define SPR_IMMUCFGR_NTS	0x0000001C
+#define SPR_IMMUCFGR_NAE	0x000000E0
+#define SPR_IMMUCFGR_CRI	0x00000100
+#define SPR_IMMUCFGR_PRI	0x00000200
+#define SPR_IMMUCFGR_TEIRI	0x00000400
+#define SPR_IMMUCFGR_HTR	0x00000800
+
+#define SPR_IMMUCFGR_NTW_OFF	0
+#define SPR_IMMUCFGR_NTS_OFF	2
+
+/*
+ * Bit definitions for Debug Control registers
+ *
+ */
+#define SPR_DCR_DP	0x00000001  /* DVR/DCR present */
+#define SPR_DCR_CC	0x0000000e  /* Compare condition */
+#define SPR_DCR_SC	0x00000010  /* Signed compare */
+#define SPR_DCR_CT	0x000000e0  /* Compare to */
+
+/* Bit results with SPR_DCR_CC mask */
+#define SPR_DCR_CC_MASKED 0x00000000
+#define SPR_DCR_CC_EQUAL  0x00000002
+#define SPR_DCR_CC_LESS   0x00000004
+#define SPR_DCR_CC_LESSE  0x00000006
+#define SPR_DCR_CC_GREAT  0x00000008
+#define SPR_DCR_CC_GREATE 0x0000000a
+#define SPR_DCR_CC_NEQUAL 0x0000000c
+
+/* Bit results with SPR_DCR_CT mask */
+#define SPR_DCR_CT_DISABLED 0x00000000
+#define SPR_DCR_CT_IFEA     0x00000020
+#define SPR_DCR_CT_LEA      0x00000040
+#define SPR_DCR_CT_SEA      0x00000060
+#define SPR_DCR_CT_LD       0x00000080
+#define SPR_DCR_CT_SD       0x000000a0
+#define SPR_DCR_CT_LSEA     0x000000c0
+#define SPR_DCR_CT_LSD	    0x000000e0
+/* SPR_DCR_CT_LSD doesn't seem to be implemented anywhere in or1ksim. 2004-1-30 HP */
+
+/*
+ * Bit definitions for Debug Mode 1 register
+ *
+ */
+#define SPR_DMR1_CW       0x000fffff  /* Chain register pair data */
+#define SPR_DMR1_CW0_AND  0x00000001
+#define SPR_DMR1_CW0_OR   0x00000002
+#define SPR_DMR1_CW0  	  (SPR_DMR1_CW0_AND | SPR_DMR1_CW0_OR)
+#define SPR_DMR1_CW1_AND  0x00000004
+#define SPR_DMR1_CW1_OR   0x00000008
+#define SPR_DMR1_CW1  	  (SPR_DMR1_CW1_AND | SPR_DMR1_CW1_OR)
+#define SPR_DMR1_CW2_AND  0x00000010
+#define SPR_DMR1_CW2_OR   0x00000020
+#define SPR_DMR1_CW2  	  (SPR_DMR1_CW2_AND | SPR_DMR1_CW2_OR)
+#define SPR_DMR1_CW3_AND  0x00000040
+#define SPR_DMR1_CW3_OR   0x00000080
+#define SPR_DMR1_CW3  	  (SPR_DMR1_CW3_AND | SPR_DMR1_CW3_OR)
+#define SPR_DMR1_CW4_AND  0x00000100
+#define SPR_DMR1_CW4_OR   0x00000200
+#define SPR_DMR1_CW4  	  (SPR_DMR1_CW4_AND | SPR_DMR1_CW4_OR)
+#define SPR_DMR1_CW5_AND  0x00000400
+#define SPR_DMR1_CW5_OR   0x00000800
+#define SPR_DMR1_CW5  	  (SPR_DMR1_CW5_AND | SPR_DMR1_CW5_OR)
+#define SPR_DMR1_CW6_AND  0x00001000
+#define SPR_DMR1_CW6_OR   0x00002000
+#define SPR_DMR1_CW6  	  (SPR_DMR1_CW6_AND | SPR_DMR1_CW6_OR)
+#define SPR_DMR1_CW7_AND  0x00004000
+#define SPR_DMR1_CW7_OR   0x00008000
+#define SPR_DMR1_CW7  	  (SPR_DMR1_CW7_AND | SPR_DMR1_CW7_OR)
+#define SPR_DMR1_CW8_AND  0x00010000
+#define SPR_DMR1_CW8_OR   0x00020000
+#define SPR_DMR1_CW8  	  (SPR_DMR1_CW8_AND | SPR_DMR1_CW8_OR)
+#define SPR_DMR1_CW9_AND  0x00040000
+#define SPR_DMR1_CW9_OR   0x00080000
+#define SPR_DMR1_CW9  	  (SPR_DMR1_CW9_AND | SPR_DMR1_CW9_OR)
+#define SPR_DMR1_RES1      0x00300000  /* Reserved */
+#define SPR_DMR1_ST	  0x00400000  /* Single-step trace*/
+#define SPR_DMR1_BT	  0x00800000  /* Branch trace */
+#define SPR_DMR1_RES2	  0xff000000  /* Reserved */
+
+/*
+ * Bit definitions for Debug Mode 2 register. AWTC and WGB corrected by JPB
+ *
+ */
+#define SPR_DMR2_WCE0	   0x00000001  /* Watchpoint counter 0 enable */
+#define SPR_DMR2_WCE1	   0x00000002  /* Watchpoint counter 0 enable */
+#define SPR_DMR2_AWTC	   0x00000ffc  /* Assign watchpoints to counters */
+#define SPR_DMR2_AWTC_OFF           2  /* Bit offset to AWTC field */
+#define SPR_DMR2_WGB	   0x003ff000  /* Watchpoints generating breakpoint */
+#define SPR_DMR2_WGB_OFF           12  /* Bit offset to WGB field */
+#define SPR_DMR2_WBS	   0xffc00000  /* JPB: Watchpoint status */
+#define SPR_DMR2_WBS_OFF           22  /* Bit offset to WBS field */
+
+/*
+ * Bit definitions for Debug watchpoint counter registers
+ *
+ */
+#define SPR_DWCR_COUNT	    0x0000ffff  /* Count */
+#define SPR_DWCR_MATCH	    0xffff0000  /* Match */
+#define SPR_DWCR_MATCH_OFF          16  /* Match bit offset */
+
+/*
+ * Bit definitions for Debug stop register
+ *
+ */
+#define SPR_DSR_RSTE	0x00000001  /* Reset exception */
+#define SPR_DSR_BUSEE	0x00000002  /* Bus error exception */
+#define SPR_DSR_DPFE	0x00000004  /* Data Page Fault exception */
+#define SPR_DSR_IPFE	0x00000008  /* Insn Page Fault exception */
+#define SPR_DSR_TTE	0x00000010  /* Tick Timer exception */
+#define SPR_DSR_AE	0x00000020  /* Alignment exception */
+#define SPR_DSR_IIE	0x00000040  /* Illegal Instruction exception */
+#define SPR_DSR_IE	0x00000080  /* Interrupt exception */
+#define SPR_DSR_DME	0x00000100  /* DTLB miss exception */
+#define SPR_DSR_IME	0x00000200  /* ITLB miss exception */
+#define SPR_DSR_RE	0x00000400  /* Range exception */
+#define SPR_DSR_SCE	0x00000800  /* System call exception */
+#define SPR_DSR_FPE     0x00001000  /* Floating Point Exception */
+#define SPR_DSR_TE	0x00002000  /* Trap exception */
+
+/*
+ * Bit definitions for Debug reason register
+ *
+ */
+#define SPR_DRR_RSTE	0x00000001  /* Reset exception */
+#define SPR_DRR_BUSEE	0x00000002  /* Bus error exception */
+#define SPR_DRR_DPFE	0x00000004  /* Data Page Fault exception */
+#define SPR_DRR_IPFE	0x00000008  /* Insn Page Fault exception */
+#define SPR_DRR_TTE	0x00000010  /* Tick Timer exception */
+#define SPR_DRR_AE	0x00000020  /* Alignment exception */
+#define SPR_DRR_IIE	0x00000040  /* Illegal Instruction exception */
+#define SPR_DRR_IE	0x00000080  /* Interrupt exception */
+#define SPR_DRR_DME	0x00000100  /* DTLB miss exception */
+#define SPR_DRR_IME	0x00000200  /* ITLB miss exception */
+#define SPR_DRR_RE	0x00000400  /* Range exception */
+#define SPR_DRR_SCE	0x00000800  /* System call exception */
+#define SPR_DRR_FPE     0x00001000  /* Floating Point Exception */
+#define SPR_DRR_TE	0x00002000  /* Trap exception */
+
+/*
+ * Bit definitions for Performance counters mode registers
+ *
+ */
+#define SPR_PCMR_CP	0x00000001  /* Counter present */
+#define SPR_PCMR_UMRA	0x00000002  /* User mode read access */
+#define SPR_PCMR_CISM	0x00000004  /* Count in supervisor mode */
+#define SPR_PCMR_CIUM	0x00000008  /* Count in user mode */
+#define SPR_PCMR_LA	0x00000010  /* Load access event */
+#define SPR_PCMR_SA	0x00000020  /* Store access event */
+#define SPR_PCMR_IF	0x00000040  /* Instruction fetch event*/
+#define SPR_PCMR_DCM	0x00000080  /* Data cache miss event */
+#define SPR_PCMR_ICM	0x00000100  /* Insn cache miss event */
+#define SPR_PCMR_IFS	0x00000200  /* Insn fetch stall event */
+#define SPR_PCMR_LSUS	0x00000400  /* LSU stall event */
+#define SPR_PCMR_BS	0x00000800  /* Branch stall event */
+#define SPR_PCMR_DTLBM	0x00001000  /* DTLB miss event */
+#define SPR_PCMR_ITLBM	0x00002000  /* ITLB miss event */
+#define SPR_PCMR_DDS	0x00004000  /* Data dependency stall event */
+#define SPR_PCMR_WPE	0x03ff8000  /* Watchpoint events */
+
+/* 
+ * Bit definitions for the Power management register
+ *
+ */
+#define SPR_PMR_SDF	0x0000000f  /* Slow down factor */
+#define SPR_PMR_DME	0x00000010  /* Doze mode enable */
+#define SPR_PMR_SME	0x00000020  /* Sleep mode enable */
+#define SPR_PMR_DCGE	0x00000040  /* Dynamic clock gating enable */
+#define SPR_PMR_SUME	0x00000080  /* Suspend mode enable */
+
+/*
+ * Bit definitions for PICMR
+ *
+ */
+#define SPR_PICMR_IUM	0xfffffffc  /* Interrupt unmask */
+
+/*
+ * Bit definitions for PICPR
+ *
+ */
+#define SPR_PICPR_IPRIO	0xfffffffc  /* Interrupt priority */
+
+/*
+ * Bit definitions for PICSR
+ *
+ */
+#define SPR_PICSR_IS	0xffffffff  /* Interrupt status */
+
+/*
+ * Bit definitions for Tick Timer Control Register
+ *
+ */
+#define SPR_TTCR_PERIOD	0x0fffffff  /* Time Period */
+#define SPR_TTMR_PERIOD	SPR_TTCR_PERIOD
+#define SPR_TTMR_IP	0x10000000  /* Interrupt Pending */
+#define SPR_TTMR_IE	0x20000000  /* Interrupt Enable */
+#define SPR_TTMR_RT	0x40000000  /* Restart tick */
+#define SPR_TTMR_SR     0x80000000  /* Single run */
+#define SPR_TTMR_CR     0xc0000000  /* Continuous run */
+#define SPR_TTMR_M      0xc0000000  /* Tick mode */
+
+/*
+ * Bit definitions for the FP Control Status Register
+ *
+ */
+#define SPR_FPCSR_FPEE  0x00000001  /* Floating Point Exception Enable */
+#define SPR_FPCSR_RM    0x00000006  /* Rounding Mode */
+#define SPR_FPCSR_OVF   0x00000008  /* Overflow Flag */
+#define SPR_FPCSR_UNF   0x00000010  /* Underflow Flag */
+#define SPR_FPCSR_SNF   0x00000020  /* SNAN Flag */
+#define SPR_FPCSR_QNF   0x00000040  /* QNAN Flag */
+#define SPR_FPCSR_ZF    0x00000080  /* Zero Flag */
+#define SPR_FPCSR_IXF   0x00000100  /* Inexact Flag */
+#define SPR_FPCSR_IVF   0x00000200  /* Invalid Flag */
+#define SPR_FPCSR_INF   0x00000400  /* Infinity Flag */
+#define SPR_FPCSR_DZF   0x00000800  /* Divide By Zero Flag */
+#define SPR_FPCSR_ALLF (SPR_FPCSR_OVF | SPR_FPCSR_UNF | SPR_FPCSR_SNF | \
+			SPR_FPCSR_QNF | SPR_FPCSR_ZF | SPR_FPCSR_IXF |  \
+			SPR_FPCSR_IVF | SPR_FPCSR_INF | SPR_FPCSR_DZF)
+
+#define FPCSR_RM_RN (0<<1)
+#define FPCSR_RM_RZ (1<<1)
+#define FPCSR_RM_RIP (2<<1)
+#define FPCSR_RM_RIN (3<<1)
+
+#endif	/* SPR_DEFS__H */
diff --git a/include/stdarg.h b/include/stdarg.h
new file mode 100644
index 0000000..08729e4
--- /dev/null
+++ b/include/stdarg.h
@@ -0,0 +1,25 @@
+#ifndef __STDARG_H
+#define __STDARG_H
+
+#include <stdlib.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define va_start(v, l) __builtin_va_start((v), l)
+#define va_arg(ap, type) __builtin_va_arg((ap), type)
+#define va_copy(aq, ap) __builtin_va_copy((aq), (ap))
+#define va_end(ap) __builtin_va_end(ap)
+#define va_list __builtin_va_list
+
+int vsnprintf(char *buf, size_t size, const char *fmt, va_list args);
+int vscnprintf(char *buf, size_t size, const char *fmt, va_list args);
+int vsprintf(char *buf, const char *fmt, va_list args);
+int vprintf(const char *format, va_list ap);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __STDARG_H */
diff --git a/include/stdbool.h b/include/stdbool.h
new file mode 100644
index 0000000..d58bb58
--- /dev/null
+++ b/include/stdbool.h
@@ -0,0 +1,8 @@
+#ifndef __STDBOOL_H
+#define __STDBOOL_H
+
+#define bool _Bool
+#define true 1
+#define false 0
+
+#endif /* __STDBOOL_H */
diff --git a/include/stddef.h b/include/stddef.h
new file mode 100644
index 0000000..4f9a211
--- /dev/null
+++ b/include/stddef.h
@@ -0,0 +1,23 @@
+#ifndef __STDDEF_H
+#define __STDDEF_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#ifdef __cplusplus
+#define NULL 0
+#else
+#define NULL ((void *)0)
+#endif
+
+typedef unsigned long size_t;
+typedef long ptrdiff_t;
+
+#define offsetof(type, member) __builtin_offsetof(type, member)
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __STDDEF_H */
diff --git a/include/stdint.h b/include/stdint.h
new file mode 100644
index 0000000..90332e3
--- /dev/null
+++ b/include/stdint.h
@@ -0,0 +1,34 @@
+#ifndef __STDINT_H
+#define __STDINT_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef int intptr_t;
+typedef unsigned int uintptr_t;
+
+typedef unsigned long long uint64_t;
+typedef unsigned int uint32_t;
+typedef unsigned short uint16_t;
+typedef unsigned char uint8_t;
+
+typedef long long int64_t;
+typedef int int32_t;
+typedef short int16_t;
+typedef char int8_t;
+
+#define __int_c_join(a, b) a ## b
+#define __int_c(v, suffix) __int_c_join(v, suffix)
+#define __uint_c(v, suffix) __int_c_join(v##U, suffix)
+
+#define INT64_C(v) __int_c(v, LL)
+#define UINT64_C(v) __uint_c(v, LL)
+#define INT32_C(v) v
+#define UINT32_C(v) v##U
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __STDINT_H */
diff --git a/include/stdio.h b/include/stdio.h
new file mode 100644
index 0000000..5e872d6
--- /dev/null
+++ b/include/stdio.h
@@ -0,0 +1,77 @@
+#ifndef __STDIO_H
+#define __STDIO_H
+
+#include <stddef.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+int putchar(int c);
+int puts(const char *s);
+
+int snprintf(char *buf, size_t size, const char *fmt, ...);
+int scnprintf(char *buf, size_t size, const char *fmt, ...);
+int sprintf(char *buf, const char *fmt, ...);
+
+int printf(const char *fmt, ...);
+
+/* Not sure this belongs here... */
+typedef long long loff_t;
+typedef long off_t;
+typedef int mode_t;
+typedef int dev_t;
+
+/*
+ * Note: this library does not provide FILE operations.
+ * User code must implement them.
+ */
+
+#ifndef BUFSIZ
+#define BUFSIZ 1024
+#endif
+
+#ifndef EOF
+#define EOF -1
+#endif
+
+#ifndef SEEK_SET
+#define SEEK_SET	0
+#endif
+
+#ifndef SEEK_CUR
+#define SEEK_CUR	1
+#endif
+
+#ifndef SEEK_END
+#define SEEK_END	2
+#endif
+
+typedef int FILE;
+
+extern FILE *stdin;
+extern FILE *stdout;
+extern FILE *stderr;
+
+int fprintf(FILE *stream, const char *format, ...);
+int fflush(FILE *stream);
+
+FILE *fopen(const char *path, const char *mode);
+FILE *freopen(const char *path, const char *mode, FILE *stream);
+char *fgets(char *s, int size, FILE *stream);
+size_t fread(void *ptr, size_t size, size_t nmemb, FILE *stream);
+size_t fwrite(const void *ptr, size_t size, size_t nmemb, FILE *stream);
+int getc(FILE *stream);
+int fputc(int c, FILE *stream);
+int ferror(FILE *stream);
+int feof(FILE *stream);
+int fclose(FILE *fp);
+
+int fseek(FILE *stream, long offset, int whence);
+long ftell(FILE *stream);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __STDIO_H */
diff --git a/include/stdlib.h b/include/stdlib.h
new file mode 100644
index 0000000..448b2f6
--- /dev/null
+++ b/include/stdlib.h
@@ -0,0 +1,85 @@
+/*
+ * MiSoC
+ * Copyright (C) 2007, 2008, 2009, 2011 Sebastien Bourdeauducq
+ * Copyright (C) Linux kernel developers
+ *
+ * This program 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, version 3 of the License.
+ *
+ * This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef __STDLIB_H
+#define __STDLIB_H
+
+#include <stddef.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define PRINTF_ZEROPAD	1		/* pad with zero */
+#define PRINTF_SIGN	2		/* unsigned/signed long */
+#define PRINTF_PLUS	4		/* show plus */
+#define PRINTF_SPACE	8		/* space if plus */
+#define PRINTF_LEFT	16		/* left justified */
+#define PRINTF_SPECIAL	32		/* 0x */
+#define PRINTF_LARGE	64		/* use 'ABCDEF' instead of 'abcdef' */
+
+#define likely(x) x
+#define unlikely(x) x
+
+static inline int abs(int x)
+{
+	return x > 0 ? x : -x;
+}
+
+static inline long int labs(long int x)
+{
+	return x > 0 ? x : -x;
+}
+
+unsigned long strtoul(const char *nptr, char **endptr, int base);
+long strtol(const char *nptr, char **endptr, int base);
+double strtod(const char *str, char **endptr);
+
+int skip_atoi(const char **s);
+static inline int atoi(const char *nptr) {
+	return strtol(nptr, NULL, 10);
+}
+static inline long atol(const char *nptr) {
+	return (long)atoi(nptr);
+}
+char *number(char *buf, char *end, unsigned long num, int base, int size, int precision, int type);
+
+#define   RAND_MAX        2147483647
+
+unsigned int rand(void);
+void srand(unsigned int seed);
+void abort(void) __attribute__((noreturn));
+
+void qsort(void *base, size_t nmemb, size_t size, int(*compar)(const void *, const void *));
+
+/*
+ * The following functions are not provided by this library.
+ */
+
+char *getenv(const char *name);
+
+void *malloc(size_t size);
+void *calloc(size_t nmemb, size_t size);
+void free(void *ptr);
+void *realloc(void *ptr, size_t size);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __STDLIB_H */
diff --git a/include/string.h b/include/string.h
new file mode 100644
index 0000000..2c45c87
--- /dev/null
+++ b/include/string.h
@@ -0,0 +1,55 @@
+/*
+ * MiSoC
+ * Copyright (C) 2007, 2008, 2009, 2010 Sebastien Bourdeauducq
+ * Copyright (C) Linus Torvalds and Linux kernel developers
+ *
+ * This program 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, version 3 of the License.
+ *
+ * This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef __STRING_H
+#define __STRING_H
+
+#include <stddef.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+char *strchr(const char *s, int c);
+char *strpbrk(const char *,const char *);
+char *strrchr(const char *s, int c);
+char *strnchr(const char *s, size_t count, int c);
+char *strcpy(char *dest, const char *src);
+char *strncpy(char *dest, const char *src, size_t count);
+int strcmp(const char *cs, const char *ct);
+int strncmp(const char *cs, const char *ct, size_t count);
+int strcasecmp(const char *cs, const char *ct);
+char *strcat(char *dest, const char *src);
+char *strncat(char *dest, const char *src, size_t n);
+size_t strlen(const char *s);
+size_t strnlen(const char *s, size_t count);
+size_t strspn(const char *s, const char *accept);
+int memcmp(const void *cs, const void *ct, size_t count);
+void *memset(void *s, int c, size_t count);
+void *memcpy(void *to, const void *from, size_t n);
+void *memmove(void *dest, const void *src, size_t count);
+char *strstr(const char *s1, const char *s2);
+void *memchr(const void *s, int c, size_t n);
+
+char *strerror(int errnum);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __STRING_H */
diff --git a/include/system.h b/include/system.h
new file mode 100644
index 0000000..2d108d2
--- /dev/null
+++ b/include/system.h
@@ -0,0 +1,59 @@
+#ifndef __SYSTEM_H
+#define __SYSTEM_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+void flush_cpu_icache(void);
+void flush_cpu_dcache(void);
+void flush_l2_cache(void);
+
+#ifdef __or1k__
+#include <spr-defs.h>
+static inline unsigned long mfspr(unsigned long add)
+{
+	unsigned long ret;
+
+	__asm__ __volatile__ ("l.mfspr %0,%1,0" : "=r" (ret) : "r" (add));
+
+	return ret;
+}
+
+static inline void mtspr(unsigned long add, unsigned long val)
+{
+	__asm__ __volatile__ ("l.mtspr %0,%1,0" : : "r" (add), "r" (val));
+}
+#endif
+
+
+#if defined(__vexriscv__) || defined(__minerva__)
+#include <csr-defs.h>
+#define csrr(reg) ({ unsigned long __tmp; \
+  asm volatile ("csrr %0, " #reg : "=r"(__tmp)); \
+  __tmp; })
+
+#define csrw(reg, val) ({ \
+  if (__builtin_constant_p(val) && (unsigned long)(val) < 32) \
+	asm volatile ("csrw " #reg ", %0" :: "i"(val)); \
+  else \
+	asm volatile ("csrw " #reg ", %0" :: "r"(val)); })
+
+#define csrs(reg, bit) ({ \
+  if (__builtin_constant_p(bit) && (unsigned long)(bit) < 32) \
+	asm volatile ("csrrs x0, " #reg ", %0" :: "i"(bit)); \
+  else \
+	asm volatile ("csrrs x0, " #reg ", %0" :: "r"(bit)); })
+
+#define csrc(reg, bit) ({ \
+  if (__builtin_constant_p(bit) && (unsigned long)(bit) < 32) \
+	asm volatile ("csrrc x0, " #reg ", %0" :: "i"(bit)); \
+  else \
+	asm volatile ("csrrc x0, " #reg ", %0" :: "r"(bit)); })
+#endif
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __SYSTEM_H */
diff --git a/include/time.h b/include/time.h
new file mode 100644
index 0000000..3408390
--- /dev/null
+++ b/include/time.h
@@ -0,0 +1,15 @@
+#ifndef __TIME_H
+#define __TIME_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+void time_init(void);
+int elapsed(int *last_event, int period);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __TIME_H */
diff --git a/include/uart.h b/include/uart.h
new file mode 100644
index 0000000..3d8a4fc
--- /dev/null
+++ b/include/uart.h
@@ -0,0 +1,20 @@
+#ifndef __UART_H
+#define __UART_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+void uart_init(void);
+void uart_isr(void);
+void uart_sync(void);
+
+void uart_write(char c);
+char uart_read(void);
+int uart_read_nonblock(void);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
diff --git a/lib/crt0-vexriscv-ctr.o b/lib/crt0-vexriscv-ctr.o
deleted file mode 100644
index 39f0df2..0000000
Binary files a/lib/crt0-vexriscv-ctr.o and /dev/null differ
diff --git a/lib/crt0-vexriscv-xip.o b/lib/crt0-vexriscv-xip.o
deleted file mode 100644
index 39f0df2..0000000
Binary files a/lib/crt0-vexriscv-xip.o and /dev/null differ
diff --git a/lib/libbase-nofloat.a b/lib/libbase-nofloat.a
deleted file mode 100644
index eac11d2..0000000
Binary files a/lib/libbase-nofloat.a and /dev/null differ
diff --git a/lib/libbase.a b/lib/libbase.a
deleted file mode 100644
index ddcc2e1..0000000
Binary files a/lib/libbase.a and /dev/null differ
diff --git a/lib/libcompiler_rt.a b/lib/libcompiler_rt.a
deleted file mode 100644
index 39fd789..0000000
Binary files a/lib/libcompiler_rt.a and /dev/null differ
diff --git a/lib/libnet.a b/lib/libnet.a
deleted file mode 100644
index 64398d5..0000000
Binary files a/lib/libnet.a and /dev/null differ
diff --git a/third_party/libbase/console.c b/third_party/libbase/console.c
new file mode 100644
index 0000000..45fbc57
--- /dev/null
+++ b/third_party/libbase/console.c
@@ -0,0 +1,85 @@
+#include <uart.h>
+#include <console.h>
+#include <stdio.h>
+#include <stdarg.h>
+
+FILE *stdin, *stdout, *stderr;
+
+static console_write_hook write_hook;
+static console_read_hook read_hook;
+static console_read_nonblock_hook read_nonblock_hook;
+
+void console_set_write_hook(console_write_hook h)
+{
+	write_hook = h;
+}
+
+void console_set_read_hook(console_read_hook r, console_read_nonblock_hook rn)
+{
+	read_hook = r;
+	read_nonblock_hook = rn;
+}
+
+int putchar(int c)
+{
+	uart_write(c);
+	if(write_hook != NULL)
+		write_hook(c);
+	return c;
+}
+
+char readchar(void)
+{
+	while(1) {
+		if(uart_read_nonblock())
+			return uart_read();
+		if((read_nonblock_hook != NULL) && read_nonblock_hook())
+			return read_hook();
+	}
+}
+
+int readchar_nonblock(void)
+{
+	return (uart_read_nonblock()
+		|| ((read_nonblock_hook != NULL) && read_nonblock_hook()));
+}
+
+int puts(const char *s)
+{
+	while(*s) {
+		putchar(*s);
+		s++;
+	}
+	putchar('\n');
+	return 1;
+}
+
+void putsnonl(const char *s)
+{
+	while(*s) {
+		putchar(*s);
+		s++;
+	}
+}
+
+#define PRINTF_BUFFER_SIZE 256
+
+int vprintf(const char *fmt, va_list args)
+{
+	int len;
+	char outbuf[PRINTF_BUFFER_SIZE];
+	len = vscnprintf(outbuf, sizeof(outbuf), fmt, args);
+	outbuf[len] = 0;
+	putsnonl(outbuf);
+	return len;
+}
+
+int printf(const char *fmt, ...)
+{
+	int len;
+	va_list args;
+	va_start(args, fmt);
+	len = vprintf(fmt, args);
+	va_end(args);
+	return len;
+}
diff --git a/third_party/libbase/crc16.c b/third_party/libbase/crc16.c
new file mode 100644
index 0000000..25434c7
--- /dev/null
+++ b/third_party/libbase/crc16.c
@@ -0,0 +1,61 @@
+#include <crc.h>
+#ifdef CRC16_FAST
+static const unsigned int crc16_table[256] = {
+	0x0000, 0x1021, 0x2042, 0x3063, 0x4084, 0x50A5, 0x60C6, 0x70E7,
+	0x8108, 0x9129, 0xA14A, 0xB16B, 0xC18C, 0xD1AD, 0xE1CE, 0xF1EF,
+	0x1231, 0x0210, 0x3273, 0x2252, 0x52B5, 0x4294, 0x72F7, 0x62D6,
+	0x9339, 0x8318, 0xB37B, 0xA35A, 0xD3BD, 0xC39C, 0xF3FF, 0xE3DE,
+	0x2462, 0x3443, 0x0420, 0x1401, 0x64E6, 0x74C7, 0x44A4, 0x5485,
+	0xA56A, 0xB54B, 0x8528, 0x9509, 0xE5EE, 0xF5CF, 0xC5AC, 0xD58D,
+	0x3653, 0x2672, 0x1611, 0x0630, 0x76D7, 0x66F6, 0x5695, 0x46B4,
+	0xB75B, 0xA77A, 0x9719, 0x8738, 0xF7DF, 0xE7FE, 0xD79D, 0xC7BC,
+	0x48C4, 0x58E5, 0x6886, 0x78A7, 0x0840, 0x1861, 0x2802, 0x3823,
+	0xC9CC, 0xD9ED, 0xE98E, 0xF9AF, 0x8948, 0x9969, 0xA90A, 0xB92B,
+	0x5AF5, 0x4AD4, 0x7AB7, 0x6A96, 0x1A71, 0x0A50, 0x3A33, 0x2A12,
+	0xDBFD, 0xCBDC, 0xFBBF, 0xEB9E, 0x9B79, 0x8B58, 0xBB3B, 0xAB1A,
+	0x6CA6, 0x7C87, 0x4CE4, 0x5CC5, 0x2C22, 0x3C03, 0x0C60, 0x1C41,
+	0xEDAE, 0xFD8F, 0xCDEC, 0xDDCD, 0xAD2A, 0xBD0B, 0x8D68, 0x9D49,
+	0x7E97, 0x6EB6, 0x5ED5, 0x4EF4, 0x3E13, 0x2E32, 0x1E51, 0x0E70,
+	0xFF9F, 0xEFBE, 0xDFDD, 0xCFFC, 0xBF1B, 0xAF3A, 0x9F59, 0x8F78,
+	0x9188, 0x81A9, 0xB1CA, 0xA1EB, 0xD10C, 0xC12D, 0xF14E, 0xE16F,
+	0x1080, 0x00A1, 0x30C2, 0x20E3, 0x5004, 0x4025, 0x7046, 0x6067,
+	0x83B9, 0x9398, 0xA3FB, 0xB3DA, 0xC33D, 0xD31C, 0xE37F, 0xF35E,
+	0x02B1, 0x1290, 0x22F3, 0x32D2, 0x4235, 0x5214, 0x6277, 0x7256,
+	0xB5EA, 0xA5CB, 0x95A8, 0x8589, 0xF56E, 0xE54F, 0xD52C, 0xC50D,
+	0x34E2, 0x24C3, 0x14A0, 0x0481, 0x7466, 0x6447, 0x5424, 0x4405,
+	0xA7DB, 0xB7FA, 0x8799, 0x97B8, 0xE75F, 0xF77E, 0xC71D, 0xD73C,
+	0x26D3, 0x36F2, 0x0691, 0x16B0, 0x6657, 0x7676, 0x4615, 0x5634,
+	0xD94C, 0xC96D, 0xF90E, 0xE92F, 0x99C8, 0x89E9, 0xB98A, 0xA9AB,
+	0x5844, 0x4865, 0x7806, 0x6827, 0x18C0, 0x08E1, 0x3882, 0x28A3,
+	0xCB7D, 0xDB5C, 0xEB3F, 0xFB1E, 0x8BF9, 0x9BD8, 0xABBB, 0xBB9A,
+	0x4A75, 0x5A54, 0x6A37, 0x7A16, 0x0AF1, 0x1AD0, 0x2AB3, 0x3A92,
+	0xFD2E, 0xED0F, 0xDD6C, 0xCD4D, 0xBDAA, 0xAD8B, 0x9DE8, 0x8DC9,
+	0x7C26, 0x6C07, 0x5C64, 0x4C45, 0x3CA2, 0x2C83, 0x1CE0, 0x0CC1,
+	0xEF1F, 0xFF3E, 0xCF5D, 0xDF7C, 0xAF9B, 0xBFBA, 0x8FD9, 0x9FF8,
+	0x6E17, 0x7E36, 0x4E55, 0x5E74, 0x2E93, 0x3EB2, 0x0ED1, 0x1EF0
+};
+
+unsigned short crc16(const unsigned char *buffer, int len)
+{
+	return 0;
+	unsigned short crc;
+	
+	crc = 0;
+	while(len-- > 0)
+	    crc = crc16_table[((crc >> 8) ^ (*buffer++)) & 0xFF] ^ (crc << 8);
+	
+	return crc;
+}
+#else
+unsigned short crc16(const unsigned char* data_p, int length) {
+    unsigned char x;
+    unsigned short crc = 0;
+
+    while (length--){
+        x = crc >> 8 ^ *data_p++;
+        x ^= x>>4;
+        crc = (crc << 8) ^ ((unsigned short)(x << 12)) ^ ((unsigned short)(x <<5)) ^ ((unsigned short)x);
+    }
+    return crc;
+}
+#endif
\ No newline at end of file
diff --git a/third_party/libbase/crc32.c b/third_party/libbase/crc32.c
new file mode 100644
index 0000000..7690ac0
--- /dev/null
+++ b/third_party/libbase/crc32.c
@@ -0,0 +1,102 @@
+/* crc32.c -- compute the CRC-32 of a data stream
+ * Copyright (C) 1995-1998 Mark Adler
+ * For conditions of distribution and use, see copyright notice in zlib.h
+ */
+
+#include <crc.h>
+
+#ifdef CRC32_FAST
+static const unsigned int crc_table[256] = {
+	0x00000000L, 0x77073096L, 0xee0e612cL, 0x990951baL, 0x076dc419L,
+	0x706af48fL, 0xe963a535L, 0x9e6495a3L, 0x0edb8832L, 0x79dcb8a4L,
+	0xe0d5e91eL, 0x97d2d988L, 0x09b64c2bL, 0x7eb17cbdL, 0xe7b82d07L,
+	0x90bf1d91L, 0x1db71064L, 0x6ab020f2L, 0xf3b97148L, 0x84be41deL,
+	0x1adad47dL, 0x6ddde4ebL, 0xf4d4b551L, 0x83d385c7L, 0x136c9856L,
+	0x646ba8c0L, 0xfd62f97aL, 0x8a65c9ecL, 0x14015c4fL, 0x63066cd9L,
+	0xfa0f3d63L, 0x8d080df5L, 0x3b6e20c8L, 0x4c69105eL, 0xd56041e4L,
+	0xa2677172L, 0x3c03e4d1L, 0x4b04d447L, 0xd20d85fdL, 0xa50ab56bL,
+	0x35b5a8faL, 0x42b2986cL, 0xdbbbc9d6L, 0xacbcf940L, 0x32d86ce3L,
+	0x45df5c75L, 0xdcd60dcfL, 0xabd13d59L, 0x26d930acL, 0x51de003aL,
+	0xc8d75180L, 0xbfd06116L, 0x21b4f4b5L, 0x56b3c423L, 0xcfba9599L,
+	0xb8bda50fL, 0x2802b89eL, 0x5f058808L, 0xc60cd9b2L, 0xb10be924L,
+	0x2f6f7c87L, 0x58684c11L, 0xc1611dabL, 0xb6662d3dL, 0x76dc4190L,
+	0x01db7106L, 0x98d220bcL, 0xefd5102aL, 0x71b18589L, 0x06b6b51fL,
+	0x9fbfe4a5L, 0xe8b8d433L, 0x7807c9a2L, 0x0f00f934L, 0x9609a88eL,
+	0xe10e9818L, 0x7f6a0dbbL, 0x086d3d2dL, 0x91646c97L, 0xe6635c01L,
+	0x6b6b51f4L, 0x1c6c6162L, 0x856530d8L, 0xf262004eL, 0x6c0695edL,
+	0x1b01a57bL, 0x8208f4c1L, 0xf50fc457L, 0x65b0d9c6L, 0x12b7e950L,
+	0x8bbeb8eaL, 0xfcb9887cL, 0x62dd1ddfL, 0x15da2d49L, 0x8cd37cf3L,
+	0xfbd44c65L, 0x4db26158L, 0x3ab551ceL, 0xa3bc0074L, 0xd4bb30e2L,
+	0x4adfa541L, 0x3dd895d7L, 0xa4d1c46dL, 0xd3d6f4fbL, 0x4369e96aL,
+	0x346ed9fcL, 0xad678846L, 0xda60b8d0L, 0x44042d73L, 0x33031de5L,
+	0xaa0a4c5fL, 0xdd0d7cc9L, 0x5005713cL, 0x270241aaL, 0xbe0b1010L,
+	0xc90c2086L, 0x5768b525L, 0x206f85b3L, 0xb966d409L, 0xce61e49fL,
+	0x5edef90eL, 0x29d9c998L, 0xb0d09822L, 0xc7d7a8b4L, 0x59b33d17L,
+	0x2eb40d81L, 0xb7bd5c3bL, 0xc0ba6cadL, 0xedb88320L, 0x9abfb3b6L,
+	0x03b6e20cL, 0x74b1d29aL, 0xead54739L, 0x9dd277afL, 0x04db2615L,
+	0x73dc1683L, 0xe3630b12L, 0x94643b84L, 0x0d6d6a3eL, 0x7a6a5aa8L,
+	0xe40ecf0bL, 0x9309ff9dL, 0x0a00ae27L, 0x7d079eb1L, 0xf00f9344L,
+	0x8708a3d2L, 0x1e01f268L, 0x6906c2feL, 0xf762575dL, 0x806567cbL,
+	0x196c3671L, 0x6e6b06e7L, 0xfed41b76L, 0x89d32be0L, 0x10da7a5aL,
+	0x67dd4accL, 0xf9b9df6fL, 0x8ebeeff9L, 0x17b7be43L, 0x60b08ed5L,
+	0xd6d6a3e8L, 0xa1d1937eL, 0x38d8c2c4L, 0x4fdff252L, 0xd1bb67f1L,
+	0xa6bc5767L, 0x3fb506ddL, 0x48b2364bL, 0xd80d2bdaL, 0xaf0a1b4cL,
+	0x36034af6L, 0x41047a60L, 0xdf60efc3L, 0xa867df55L, 0x316e8eefL,
+	0x4669be79L, 0xcb61b38cL, 0xbc66831aL, 0x256fd2a0L, 0x5268e236L,
+	0xcc0c7795L, 0xbb0b4703L, 0x220216b9L, 0x5505262fL, 0xc5ba3bbeL,
+	0xb2bd0b28L, 0x2bb45a92L, 0x5cb36a04L, 0xc2d7ffa7L, 0xb5d0cf31L,
+	0x2cd99e8bL, 0x5bdeae1dL, 0x9b64c2b0L, 0xec63f226L, 0x756aa39cL,
+	0x026d930aL, 0x9c0906a9L, 0xeb0e363fL, 0x72076785L, 0x05005713L,
+	0x95bf4a82L, 0xe2b87a14L, 0x7bb12baeL, 0x0cb61b38L, 0x92d28e9bL,
+	0xe5d5be0dL, 0x7cdcefb7L, 0x0bdbdf21L, 0x86d3d2d4L, 0xf1d4e242L,
+	0x68ddb3f8L, 0x1fda836eL, 0x81be16cdL, 0xf6b9265bL, 0x6fb077e1L,
+	0x18b74777L, 0x88085ae6L, 0xff0f6a70L, 0x66063bcaL, 0x11010b5cL,
+	0x8f659effL, 0xf862ae69L, 0x616bffd3L, 0x166ccf45L, 0xa00ae278L,
+	0xd70dd2eeL, 0x4e048354L, 0x3903b3c2L, 0xa7672661L, 0xd06016f7L,
+	0x4969474dL, 0x3e6e77dbL, 0xaed16a4aL, 0xd9d65adcL, 0x40df0b66L,
+	0x37d83bf0L, 0xa9bcae53L, 0xdebb9ec5L, 0x47b2cf7fL, 0x30b5ffe9L,
+	0xbdbdf21cL, 0xcabac28aL, 0x53b39330L, 0x24b4a3a6L, 0xbad03605L,
+	0xcdd70693L, 0x54de5729L, 0x23d967bfL, 0xb3667a2eL, 0xc4614ab8L,
+	0x5d681b02L, 0x2a6f2b94L, 0xb40bbe37L, 0xc30c8ea1L, 0x5a05df1bL,
+	0x2d02ef8dL
+};
+
+#define DO1(buf) crc = crc_table[((int)crc ^ (*buf++)) & 0xff] ^ (crc >> 8);
+#define DO2(buf)  DO1(buf); DO1(buf);
+#define DO4(buf)  DO2(buf); DO2(buf);
+#define DO8(buf)  DO4(buf); DO4(buf);
+
+unsigned int crc32(const unsigned char *buffer, unsigned int len)
+{
+	return 0;
+	unsigned int crc;
+	crc = 0;
+	crc = crc ^ 0xffffffffL;
+	while(len >= 8) {
+		DO8(buffer);
+		len -= 8;
+	}
+	if(len) do {
+		DO1(buffer);
+	} while(--len);
+	return crc ^ 0xffffffffL;
+}
+#else
+unsigned int crc32(const unsigned char *message, unsigned int len) {
+   int i, j;
+   unsigned int byte, crc, mask;
+
+   i = 0;
+   crc = 0xFFFFFFFF;
+   while (i < len) {
+      byte = message[i];            // Get next byte.
+      crc = crc ^ byte;
+      for (j = 7; j >= 0; j--) {    // Do eight times.
+         mask = -(crc & 1);
+         crc = (crc >> 1) ^ (0xEDB88320 & mask);
+      }
+      i = i + 1;
+   }
+   return ~crc;
+}
+#endif
\ No newline at end of file
diff --git a/third_party/libbase/crt0-vexriscv.S b/third_party/libbase/crt0-vexriscv.S
new file mode 100644
index 0000000..c27a3da
--- /dev/null
+++ b/third_party/libbase/crt0-vexriscv.S
@@ -0,0 +1,76 @@
+.global main
+.global isr
+.global _start
+
+_start:
+  j crt_init
+  nop
+  nop
+  nop
+  nop
+  nop
+  nop
+  nop
+
+.global  trap_entry
+trap_entry:
+  sw x1,  - 1*4(sp)
+  sw x5,  - 2*4(sp)
+  sw x6,  - 3*4(sp)
+  sw x7,  - 4*4(sp)
+  sw x10, - 5*4(sp)
+  sw x11, - 6*4(sp)
+  sw x12, - 7*4(sp)
+  sw x13, - 8*4(sp)
+  sw x14, - 9*4(sp)
+  sw x15, -10*4(sp)
+  sw x16, -11*4(sp)
+  sw x17, -12*4(sp)
+  sw x28, -13*4(sp)
+  sw x29, -14*4(sp)
+  sw x30, -15*4(sp)
+  sw x31, -16*4(sp)
+  addi sp,sp,-16*4
+  call isr
+  lw x1 , 15*4(sp)
+  lw x5,  14*4(sp)
+  lw x6,  13*4(sp)
+  lw x7,  12*4(sp)
+  lw x10, 11*4(sp)
+  lw x11, 10*4(sp)
+  lw x12,  9*4(sp)
+  lw x13,  8*4(sp)
+  lw x14,  7*4(sp)
+  lw x15,  6*4(sp)
+  lw x16,  5*4(sp)
+  lw x17,  4*4(sp)
+  lw x28,  3*4(sp)
+  lw x29,  2*4(sp)
+  lw x30,  1*4(sp)
+  lw x31,  0*4(sp)
+  addi sp,sp,16*4
+  mret
+  .text
+
+
+crt_init:
+  la sp, _fstack + 4
+  la a0, trap_entry
+  csrw mtvec, a0
+
+bss_init:
+  la a0, _fbss
+  la a1, _ebss
+bss_loop:
+  beq a0,a1,bss_done
+  sw zero,0(a0)
+  add a0,a0,4
+  j bss_loop
+bss_done:
+
+  li a0, 0x880  //880 enable timer + external interrupt sources (until mstatus.MIE is set, they will never trigger an interrupt)
+  csrw mie,a0
+
+  call main
+infinit_loop:
+  j infinit_loop
diff --git a/third_party/libbase/errno.c b/third_party/libbase/errno.c
new file mode 100644
index 0000000..4e91f78
--- /dev/null
+++ b/third_party/libbase/errno.c
@@ -0,0 +1,208 @@
+#include <string.h>
+#include <errno.h>
+
+int errno;
+
+/************************************************************************
+ * Based on: lib/string/lib_strerror.c
+ *
+ *   Copyright (C) 2007, 2009, 2011 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ************************************************************************/
+
+struct errno_strmap_s
+{
+  int errnum;
+  char *str;
+};
+
+/* This table maps all error numbers to descriptive strings.
+ * The only assumption that the code makes with regard to this
+ * this table is that it is order by error number.
+ *
+ * The size of this table is quite large.  Its size can be
+ * reduced by eliminating some of the more obscure error
+ * strings.
+ */
+
+struct errno_strmap_s g_errnomap[] =
+{
+  { EPERM,               EPERM_STR           },
+  { ENOENT,              ENOENT_STR          },
+  { ESRCH,               ESRCH_STR           },
+  { EINTR,               EINTR_STR           },
+  { EIO,                 EIO_STR             },
+  { ENXIO,               ENXIO_STR           },
+  { E2BIG,               E2BIG_STR           },
+  { ENOEXEC,             ENOEXEC_STR         },
+  { EBADF,               EBADF_STR           },
+  { ECHILD,              ECHILD_STR          },
+  { EAGAIN,              EAGAIN_STR          },
+  { ENOMEM,              ENOMEM_STR          },
+  { EACCES,              EACCES_STR          },
+  { EFAULT,              EFAULT_STR          },
+  { ENOTBLK,             ENOTBLK_STR         },
+  { EBUSY,               EBUSY_STR           },
+  { EEXIST,              EEXIST_STR          },
+  { EXDEV,               EXDEV_STR           },
+  { ENODEV,              ENODEV_STR          },
+  { ENOTDIR,             ENOTDIR_STR         },
+  { EISDIR,              EISDIR_STR          },
+  { EINVAL,              EINVAL_STR          },
+  { ENFILE,              ENFILE_STR          },
+  { EMFILE,              EMFILE_STR          },
+  { ENOTTY,              ENOTTY_STR          },
+  { ETXTBSY,             ETXTBSY_STR         },
+  { EFBIG,               EFBIG_STR           },
+  { ENOSPC,              ENOSPC_STR          },
+  { ESPIPE,              ESPIPE_STR          },
+  { EROFS,               EROFS_STR           },
+  { EMLINK,              EMLINK_STR          },
+  { EPIPE,               EPIPE_STR           },
+  { EDOM,                EDOM_STR            },
+  { ERANGE,              ERANGE_STR          },
+  { EDEADLK,             EDEADLK_STR         },
+  { ENAMETOOLONG,        ENAMETOOLONG_STR    },
+  { ENOLCK,              ENOLCK_STR          },
+  { ENOSYS,              ENOSYS_STR          },
+  { ENOTEMPTY,           ENOTEMPTY_STR       },
+  { ELOOP,               ELOOP_STR           },
+  { ENOMSG,              ENOMSG_STR          },
+  { EIDRM,               EIDRM_STR           },
+  { ECHRNG,              ECHRNG_STR          },
+  { EL2NSYNC,            EL2NSYNC_STR        },
+  { EL3HLT,              EL3HLT_STR          },
+  { EL3RST,              EL3RST_STR          },
+  { ELNRNG,              ELNRNG_STR          },
+  { EUNATCH,             EUNATCH_STR         },
+  { ENOCSI,              ENOCSI_STR          },
+  { EL2HLT,              EL2HLT_STR          },
+  { EBADE,               EBADE_STR           },
+  { EBADR,               EBADR_STR           },
+  { EXFULL,              EXFULL_STR          },
+  { ENOANO,              ENOANO_STR          },
+  { EBADRQC,             EBADRQC_STR         },
+  { EBADSLT,             EBADSLT_STR         },
+  { EBFONT,              EBFONT_STR          },
+  { ENOSTR,              ENOSTR_STR          },
+  { ENODATA,             ENODATA_STR         },
+  { ETIME,               ETIME_STR           },
+  { ENOSR,               ENOSR_STR           },
+  { ENONET,              ENONET_STR          },
+  { ENOPKG,              ENOPKG_STR          },
+  { EREMOTE,             EREMOTE_STR         },
+  { ENOLINK,             ENOLINK_STR         },
+  { EADV,                EADV_STR            },
+  { ESRMNT,              ESRMNT_STR          },
+  { ECOMM,               ECOMM_STR           },
+  { EPROTO,              EPROTO_STR          },
+  { EMULTIHOP,           EMULTIHOP_STR       },
+  { EDOTDOT,             EDOTDOT_STR         },
+  { EBADMSG,             EBADMSG_STR         },
+  { EOVERFLOW,           EOVERFLOW_STR       },
+  { ENOTUNIQ,            ENOTUNIQ_STR        },
+  { EBADFD,              EBADFD_STR          },
+  { EREMCHG,             EREMCHG_STR         },
+  { ELIBACC,             ELIBACC_STR         },
+  { ELIBBAD,             ELIBBAD_STR         },
+  { ELIBSCN,             ELIBSCN_STR         },
+  { ELIBMAX,             ELIBMAX_STR         },
+  { ELIBEXEC,            ELIBEXEC_STR        },
+  { EILSEQ,              EILSEQ_STR          },
+  { ERESTART,            ERESTART_STR        },
+  { ESTRPIPE,            ESTRPIPE_STR        },
+  { EUSERS,              EUSERS_STR          },
+  { ENOTSOCK,            ENOTSOCK_STR        },
+  { EDESTADDRREQ,        EDESTADDRREQ_STR    },
+  { EMSGSIZE,            EMSGSIZE_STR        },
+  { EPROTOTYPE,          EPROTOTYPE_STR      },
+  { ENOPROTOOPT,         ENOPROTOOPT_STR     },
+  { EPROTONOSUPPORT,     EPROTONOSUPPORT_STR },
+  { ESOCKTNOSUPPORT,     ESOCKTNOSUPPORT_STR },
+  { EOPNOTSUPP,          EOPNOTSUPP_STR      },
+  { EPFNOSUPPORT,        EPFNOSUPPORT_STR    },
+  { EAFNOSUPPORT,        EAFNOSUPPORT_STR    },
+  { EADDRINUSE,          EADDRINUSE_STR      },
+  { EADDRNOTAVAIL,       EADDRNOTAVAIL_STR   },
+  { ENETDOWN,            ENETDOWN_STR        },
+  { ENETUNREACH,         ENETUNREACH_STR     },
+  { ENETRESET,           ENETRESET_STR       },
+  { ECONNABORTED,        ECONNABORTED_STR    },
+  { ECONNRESET,          ECONNRESET_STR      },
+  { ENOBUFS,             ENOBUFS_STR         },
+  { EISCONN,             EISCONN_STR         },
+  { ENOTCONN,            ENOTCONN_STR        },
+  { ESHUTDOWN,           ESHUTDOWN_STR       },
+  { ETOOMANYREFS,        ETOOMANYREFS_STR    },
+  { ETIMEDOUT,           ETIMEDOUT_STR       },
+  { ECONNREFUSED,        ECONNREFUSED_STR    },
+  { EHOSTDOWN,           EHOSTDOWN_STR       },
+  { EHOSTUNREACH,        EHOSTUNREACH_STR    },
+  { EALREADY,            EALREADY_STR        },
+  { EINPROGRESS,         EINPROGRESS_STR     },
+  { ESTALE,              ESTALE_STR          },
+  { EUCLEAN,             EUCLEAN_STR         },
+  { ENOTNAM,             ENOTNAM_STR         },
+  { ENAVAIL,             ENAVAIL_STR         },
+  { EISNAM,              EISNAM_STR          },
+  { EREMOTEIO,           EREMOTEIO_STR       },
+  { EDQUOT,              EDQUOT_STR          },
+  { ENOMEDIUM,           ENOMEDIUM_STR       },
+  { EMEDIUMTYPE,         EMEDIUMTYPE_STR     }
+};
+
+#define NERRNO_STRS (sizeof(g_errnomap) / sizeof(struct errno_strmap_s))
+
+char *strerror(int errnum)
+{
+  int ndxlow = 0;
+  int ndxhi  = NERRNO_STRS - 1;
+  int ndxmid;
+
+  do
+    {
+      ndxmid = (ndxlow + ndxhi) >> 1;
+      if (errnum > g_errnomap[ndxmid].errnum)
+        {
+          ndxlow = ndxmid + 1;
+        }
+      else if (errnum < g_errnomap[ndxmid].errnum)
+        {
+          ndxhi = ndxmid - 1;
+        }
+      else
+        {
+          return g_errnomap[ndxmid].str;
+        }
+    }
+  while (ndxlow <= ndxhi);
+  return "Unknown error";
+}
diff --git a/third_party/libbase/exception.c b/third_party/libbase/exception.c
new file mode 100644
index 0000000..09b2639
--- /dev/null
+++ b/third_party/libbase/exception.c
@@ -0,0 +1,211 @@
+#include <generated/csr.h>
+#include <stdio.h>
+#include <stdarg.h>
+
+void isr(void);
+
+#ifdef __or1k__
+
+#include <hw/flags.h>
+
+#define EXTERNAL_IRQ 0x8
+
+static void emerg_printf(const char *fmt, ...)
+{
+	char buf[512];
+	va_list args;
+	va_start(args, fmt);
+	vsnprintf(buf, sizeof(buf), fmt, args);
+	va_end(args);
+
+	char *p = buf;
+	while(*p) {
+		while(uart_txfull_read());
+		uart_rxtx_write(*p++);
+	}
+}
+
+static char emerg_getc(void)
+{
+	while(uart_rxempty_read());
+	char c = uart_rxtx_read();
+	uart_ev_pending_write(UART_EV_RX);
+	return c;
+}
+
+static const char hex[] = "0123456789abcdef";
+
+static void gdb_send(const char *txbuf)
+{
+	unsigned char cksum = 0;
+	const char *p = txbuf;
+	while(*p) cksum += *p++;
+	emerg_printf("+$%s#%c%c", txbuf, hex[cksum >> 4], hex[cksum & 0xf]);
+}
+
+static void gdb_recv(char *rxbuf, size_t size)
+{
+	size_t pos = (size_t)-1;
+	for(;;) {
+		char c = emerg_getc();
+		if(c == '$')
+			pos = 0;
+		else if(c == '#')
+			return;
+		else if(pos < size - 1) {
+			rxbuf[pos++] = c;
+			rxbuf[pos] = 0;
+		}
+	}
+}
+
+static void gdb_stub(unsigned long pc, unsigned long sr,
+                     unsigned long r1, unsigned long *regs)
+{
+	gdb_send("S05");
+
+	char buf[385];
+	for(;;) {
+		gdb_recv(buf, sizeof(buf));
+
+		switch(buf[0]) {
+			case '?': {
+				snprintf(buf, sizeof(buf), "S05");
+				break;
+			}
+
+			case 'g': {
+				snprintf(buf, sizeof(buf),
+				         "%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x"
+				         "%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x"
+				         "%08x%08x%08x",
+				         0,        r1,       regs[2],  regs[3],  regs[4],  regs[5],  regs[6],  regs[7],
+				         regs[8],  regs[9],  regs[10], regs[11], regs[12], regs[13], regs[14], regs[15],
+				         regs[16], regs[17], regs[18], regs[19], regs[20], regs[21], regs[22], regs[23],
+				         regs[24], regs[25], regs[26], regs[27], regs[28], regs[29], regs[30], regs[31],
+				         pc-4,     pc,       sr);
+				break;
+			}
+
+			case 'm': {
+				unsigned long addr, len;
+				char *endptr = &buf[0];
+				addr  = strtoul(endptr + 1, &endptr, 16);
+				len   = strtoul(endptr + 1, &endptr, 16);
+				unsigned char *ptr = (unsigned char *)addr;
+				if(len > sizeof(buf) / 2) len = sizeof(buf) / 2;
+				for(size_t i = 0; i < len; i++) {
+					buf[i*2  ] = hex[ptr[i] >> 4];
+					buf[i*2+1] = hex[ptr[i] & 15];
+					buf[i*2+2] = 0;
+				}
+				break;
+			}
+
+			case 'p': {
+				unsigned long reg, value;
+				char *endptr = &buf[0];
+				reg   = strtoul(endptr + 1, &endptr, 16);
+				if(reg == 0)
+					value = 0;
+				else if(reg == 1)
+					value = r1;
+				else if(reg >= 2 && reg <= 31)
+					value = regs[reg];
+				else if(reg == 33)
+					value = pc;
+				else if(reg == 34)
+					value = sr;
+				else {
+					snprintf(buf, sizeof(buf), "E01");
+					break;
+				}
+				snprintf(buf, sizeof(buf), "%08x", value);
+				break;
+			}
+
+			case 'P': {
+				unsigned long reg, value;
+				char *endptr = &buf[0];
+				reg   = strtoul(endptr + 1, &endptr, 16);
+				value = strtoul(endptr + 1, &endptr, 16);
+				if(reg == 0)
+					/* ignore */;
+				else if(reg == 1)
+					r1 = value;
+				else if(reg >= 2 && reg <= 31)
+					regs[reg] = value;
+				else if(reg == 33)
+					pc = value;
+				else if(reg == 34)
+					sr = value;
+				else {
+					snprintf(buf, sizeof(buf), "E01");
+					break;
+				}
+				snprintf(buf, sizeof(buf), "OK");
+				break;
+			}
+
+			case 'c': {
+				if(buf[1] != '\0') {
+					snprintf(buf, sizeof(buf), "E01");
+					break;
+				}
+				return;
+			}
+
+			default:
+				snprintf(buf, sizeof(buf), "");
+				break;
+		}
+
+		do {
+			gdb_send(buf);
+		} while(emerg_getc() == '-');
+	}
+}
+
+void exception_handler(unsigned long vect, unsigned long *regs,
+                       unsigned long pc, unsigned long ea, unsigned long sr);
+void exception_handler(unsigned long vect, unsigned long *regs,
+                       unsigned long pc, unsigned long ea, unsigned long sr)
+{
+	if(vect == EXTERNAL_IRQ) {
+		isr();
+	} else {
+		emerg_printf("\n *** Unhandled exception %d *** \n", vect);
+		emerg_printf("   pc  %08x sr  %08x ea  %08x\n",
+		             pc, sr, ea);
+		unsigned long r1 = (unsigned long)regs + 4*32;
+		regs -= 2;
+		emerg_printf("   r0  %08x r1  %08x r2  %08x r3  %08x\n",
+		             0, r1, regs[2], regs[3]);
+		emerg_printf("   r4  %08x r5  %08x r6  %08x r7  %08x\n",
+		             regs[4], regs[5], regs[6], regs[7]);
+		emerg_printf("   r8  %08x r9  %08x r10 %08x r11 %08x\n",
+		             regs[8], regs[9], regs[10], regs[11]);
+		emerg_printf("   r12 %08x r13 %08x r14 %08x r15 %08x\n",
+		             regs[12], regs[13], regs[14], regs[15]);
+		emerg_printf("   r16 %08x r17 %08x r18 %08x r19 %08x\n",
+		             regs[16], regs[17], regs[18], regs[19]);
+		emerg_printf("   r20 %08x r21 %08x r22 %08x r23 %08x\n",
+		             regs[20], regs[21], regs[22], regs[23]);
+		emerg_printf("   r24 %08x r25 %08x r26 %08x r27 %08x\n",
+		             regs[24], regs[25], regs[26], regs[27]);
+		emerg_printf("   r28 %08x r29 %08x r30 %08x r31 %08x\n",
+		             regs[28], regs[29], regs[30], regs[31]);
+		emerg_printf(" stack:\n");
+		unsigned long *sp = (unsigned long *)r1;
+		for(unsigned long spoff = 0; spoff < 16; spoff += 4) {
+			emerg_printf("   %08x:", &sp[spoff]);
+			for(unsigned long spoff2 = 0; spoff2 < 4; spoff2++) {
+				emerg_printf(" %08x", sp[spoff + spoff2]);
+			}
+			emerg_printf("\n");
+		}
+		emerg_printf(" waiting for gdb... ");
+		gdb_stub(pc, sr, r1, regs);
+	}
+}
+#endif
diff --git a/third_party/libbase/id.c b/third_party/libbase/id.c
new file mode 100644
index 0000000..6d1c334
--- /dev/null
+++ b/third_party/libbase/id.c
@@ -0,0 +1,20 @@
+#include <generated/csr.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <id.h>
+
+
+void get_ident(char *ident)
+{
+#ifdef CSR_IDENTIFIER_MEM_BASE
+    int len, i;
+    
+    len = MMPTR(CSR_IDENTIFIER_MEM_BASE);
+    for(i=0;i<len;i++)
+        ident[i] = MMPTR(CSR_IDENTIFIER_MEM_BASE + 4*i);
+    ident[i] = 0;
+#else
+    ident[0] = 0;
+#endif
+}
diff --git a/third_party/libbase/libc.c b/third_party/libbase/libc.c
new file mode 100644
index 0000000..4b21a2a
--- /dev/null
+++ b/third_party/libbase/libc.c
@@ -0,0 +1,759 @@
+/*
+ * MiSoC
+ * Copyright (C) 2007, 2008, 2009, 2010, 2011 Sebastien Bourdeauducq
+ * Copyright (C) Linus Torvalds and Linux kernel developers
+ *
+ * This program 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, version 3 of the License.
+ *
+ * This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <ctype.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdarg.h>
+#include <string.h>
+#include <limits.h>
+#include <inet.h>
+
+/**
+ * strchr - Find the first occurrence of a character in a string
+ * @s: The string to be searched
+ * @c: The character to search for
+ */
+char *strchr(const char *s, int c)
+{
+	for (; *s != (char)c; ++s)
+		if (*s == '\0')
+			return NULL;
+	return (char *)s;
+}
+
+/**
+ * strpbrk - Find the first occurrence of a set of characters
+ * @cs: The string to be searched
+ * @ct: The characters to search for
+ */
+char *strpbrk(const char *cs, const char *ct)
+{
+	const char *sc1, *sc2;
+
+	for (sc1 = cs; *sc1 != '\0'; ++sc1) {
+		for (sc2 = ct; *sc2 != '\0'; ++sc2) {
+			if (*sc1 == *sc2)
+				return (char *)sc1;
+		}
+	}
+	return NULL;
+}
+
+/**
+ * strrchr - Find the last occurrence of a character in a string
+ * @s: The string to be searched
+ * @c: The character to search for
+ */
+char *strrchr(const char *s, int c)
+{
+       const char *p = s + strlen(s);
+       do {
+           if (*p == (char)c)
+               return (char *)p;
+       } while (--p >= s);
+       return NULL;
+}
+
+/**
+ * strnchr - Find a character in a length limited string
+ * @s: The string to be searched
+ * @count: The number of characters to be searched
+ * @c: The character to search for
+ */
+char *strnchr(const char *s, size_t count, int c)
+{
+	for (; count-- && *s != '\0'; ++s)
+		if (*s == (char)c)
+			return (char *)s;
+	return NULL;
+}
+
+/**
+ * strcpy - Copy a %NUL terminated string
+ * @dest: Where to copy the string to
+ * @src: Where to copy the string from
+ */
+char *strcpy(char *dest, const char *src)
+{
+	char *tmp = dest;
+
+	while ((*dest++ = *src++) != '\0')
+		/* nothing */;
+	return tmp;
+}
+
+/**
+ * strncpy - Copy a length-limited, %NUL-terminated string
+ * @dest: Where to copy the string to
+ * @src: Where to copy the string from
+ * @count: The maximum number of bytes to copy
+ *
+ * The result is not %NUL-terminated if the source exceeds
+ * @count bytes.
+ *
+ * In the case where the length of @src is less than  that  of
+ * count, the remainder of @dest will be padded with %NUL.
+ *
+ */
+char *strncpy(char *dest, const char *src, size_t count)
+{
+	char *tmp = dest;
+	
+	while (count) {
+		if ((*tmp = *src) != 0)
+			src++;
+		tmp++;
+		count--;
+	}
+	return dest;
+}
+
+/**
+ * strcmp - Compare two strings
+ * @cs: One string
+ * @ct: Another string
+ */
+int strcmp(const char *cs, const char *ct)
+{
+	signed char __res;
+
+	while (1) {
+		if ((__res = *cs - *ct++) != 0 || !*cs++)
+			break;
+	}
+	return __res;
+}
+
+/**
+ * strncmp - Compare two strings using the first characters only
+ * @cs: One string
+ * @ct: Another string
+ * @count: Number of characters
+ */
+int strncmp(const char *cs, const char *ct, size_t count)
+{
+	signed char __res;
+	size_t n;
+
+	n = 0;
+	__res = 0;
+	while (n < count) {
+		if ((__res = *cs - *ct++) != 0 || !*cs++)
+			break;
+		n++;
+	}
+	return __res;
+}
+
+/**
+ * strcat - Append one %NUL-terminated string to another
+ * @dest: The string to be appended to
+ * @src: The string to append to it
+ */
+char *strcat(char *dest, const char *src)
+{
+  char *tmp = dest;
+
+  while (*dest)
+    dest++;
+  while ((*dest++ = *src++) != '\0')
+    ;
+  return tmp;
+}
+
+/**
+ * strncat - Append a length-limited, %NUL-terminated string to another
+ * @dest: The string to be appended to
+ * @src: The string to append to it
+ * @count: The maximum numbers of bytes to copy
+ *
+ * Note that in contrast to strncpy(), strncat() ensures the result is
+ * terminated.
+ */
+char *strncat(char *dest, const char *src, size_t count)
+{
+  char *tmp = dest;
+
+  if (count) {
+    while (*dest)
+      dest++;
+    while ((*dest++ = *src++) != 0) {
+      if (--count == 0) {
+        *dest = '\0';
+        break;
+      }
+    }
+  }
+  return tmp;
+}
+
+/**
+ * strlen - Find the length of a string
+ * @s: The string to be sized
+ */
+size_t strlen(const char *s)
+{
+	const char *sc;
+
+	for (sc = s; *sc != '\0'; ++sc)
+		/* nothing */;
+	return sc - s;
+}
+
+/**
+ * strnlen - Find the length of a length-limited string
+ * @s: The string to be sized
+ * @count: The maximum number of bytes to search
+ */
+size_t strnlen(const char *s, size_t count)
+{
+	const char *sc;
+
+	for (sc = s; count-- && *sc != '\0'; ++sc)
+		/* nothing */;
+	return sc - s;
+}
+
+/**
+ * strspn - Calculate the length of the initial substring of @s which only contain letters in @accept
+ * @s: The string to be searched
+ * @accept: The string to search for
+ */
+size_t strspn(const char *s, const char *accept)
+{
+	const char *p;
+	const char *a;
+	size_t count = 0;
+
+	for (p = s; *p != '\0'; ++p) {
+		for (a = accept; *a != '\0'; ++a) {
+			if (*p == *a)
+				break;
+		}
+		if (*a == '\0')
+			return count;
+		++count;
+	}
+	return count;
+}
+
+/**
+ * memcmp - Compare two areas of memory
+ * @cs: One area of memory
+ * @ct: Another area of memory
+ * @count: The size of the area.
+ */
+int memcmp(const void *cs, const void *ct, size_t count)
+{
+	const unsigned char *su1, *su2;
+	int res = 0;
+
+	for (su1 = cs, su2 = ct; 0 < count; ++su1, ++su2, count--)
+		if ((res = *su1 - *su2) != 0)
+			break;
+	return res;
+}
+
+/**
+ * memset - Fill a region of memory with the given value
+ * @s: Pointer to the start of the area.
+ * @c: The byte to fill the area with
+ * @count: The size of the area.
+ */
+__attribute__((used)) void *memset(void *s, int c, size_t count)
+{
+	char *xs = s;
+
+	while (count--)
+		*xs++ = c;
+	return s;
+}
+
+/**
+ * memcpy - Copies one area of memory to another
+ * @dest: Destination
+ * @src: Source
+ * @n: The size to copy.
+ */
+void *memcpy(void *to, const void *from, size_t n)
+{
+	void *xto = to;
+	size_t temp;
+
+	if(!n)
+		return xto;
+	if((long)to & 1) {
+		char *cto = to;
+		const char *cfrom = from;
+		*cto++ = *cfrom++;
+		to = cto;
+		from = cfrom;
+		n--;
+	}
+	if((long)from & 1) {
+		char *cto = to;
+		const char *cfrom = from;
+		for (; n; n--)
+			*cto++ = *cfrom++;
+		return xto;
+	}
+	if(n > 2 && (long)to & 2) {
+		short *sto = to;
+		const short *sfrom = from;
+		*sto++ = *sfrom++;
+		to = sto;
+		from = sfrom;
+		n -= 2;
+	}
+	if((long)from & 2) {
+		short *sto = to;
+		const short *sfrom = from;
+		temp = n >> 1;
+		for (; temp; temp--)
+			*sto++ = *sfrom++;
+		to = sto;
+		from = sfrom;
+		if(n & 1) {
+			char *cto = to;
+			const char *cfrom = from;
+			*cto = *cfrom;
+		}
+		return xto;
+	}
+	temp = n >> 2;
+	if(temp) {
+		long *lto = to;
+		const long *lfrom = from;
+		for(; temp; temp--)
+			*lto++ = *lfrom++;
+		to = lto;
+		from = lfrom;
+	}
+	if(n & 2) {
+		short *sto = to;
+		const short *sfrom = from;
+		*sto++ = *sfrom++;
+		to = sto;
+		from = sfrom;
+	}
+	if(n & 1) {
+		char *cto = to;
+		const char *cfrom = from;
+		*cto = *cfrom;
+	}
+	return xto;
+}
+
+/**
+ * memmove - Copies one area of memory to another, overlap possible
+ * @dest: Destination
+ * @src: Source
+ * @n: The size to copy.
+ */
+void *memmove(void *dest, const void *src, size_t count)
+{
+	char *tmp, *s;
+
+	if(dest <= src) {
+		tmp = (char *) dest;
+		s = (char *) src;
+		while(count--)
+			*tmp++ = *s++;
+	} else {
+		tmp = (char *)dest + count;
+		s = (char *)src + count;
+		while(count--)
+			*--tmp = *--s;
+	}
+
+	return dest;
+}
+
+/**
+ * strstr - Find the first substring in a %NUL terminated string
+ * @s1: The string to be searched
+ * @s2: The string to search for
+ */
+char *strstr(const char *s1, const char *s2)
+{
+	size_t l1, l2;
+
+	l2 = strlen(s2);
+	if (!l2)
+		return (char *)s1;
+	l1 = strlen(s1);
+	while (l1 >= l2) {
+		l1--;
+		if (!memcmp(s1, s2, l2))
+			return (char *)s1;
+		s1++;
+	}
+	return NULL;
+}
+
+/**
+ * memchr - Find a character in an area of memory.
+ * @s: The memory area
+ * @c: The byte to search for
+ * @n: The size of the area.
+ *
+ * returns the address of the first occurrence of @c, or %NULL
+ * if @c is not found
+ */
+void *memchr(const void *s, int c, size_t n)
+{
+	const unsigned char *p = s;
+	while (n-- != 0) {
+        	if ((unsigned char)c == *p++) {
+			return (void *)(p - 1);
+		}
+	}
+	return NULL;
+}
+
+/**
+ * strtoul - convert a string to an unsigned long
+ * @nptr: The start of the string
+ * @endptr: A pointer to the end of the parsed string will be placed here
+ * @base: The number base to use
+ */
+unsigned long strtoul(const char *nptr, char **endptr, int base)
+{
+	unsigned long result = 0,value;
+
+	if (!base) {
+		base = 10;
+		if (*nptr == '0') {
+			base = 8;
+			nptr++;
+			if ((toupper(*nptr) == 'X') && isxdigit(nptr[1])) {
+				nptr++;
+				base = 16;
+			}
+		}
+	} else if (base == 16) {
+		if (nptr[0] == '0' && toupper(nptr[1]) == 'X')
+			nptr += 2;
+	}
+	while (isxdigit(*nptr) &&
+	       (value = isdigit(*nptr) ? *nptr-'0' : toupper(*nptr)-'A'+10) < base) {
+		result = result*base + value;
+		nptr++;
+	}
+	if (endptr)
+		*endptr = (char *)nptr;
+	return result;
+}
+
+/**
+ * strtol - convert a string to a signed long
+ * @nptr: The start of the string
+ * @endptr: A pointer to the end of the parsed string will be placed here
+ * @base: The number base to use
+ */
+long strtol(const char *nptr, char **endptr, int base)
+{
+	if(*nptr=='-')
+		return -strtoul(nptr+1,endptr,base);
+	return strtoul(nptr,endptr,base);
+}
+
+int skip_atoi(const char **s)
+{
+	int i=0;
+
+	while (isdigit(**s))
+		i = i*10 + *((*s)++) - '0';
+	return i;
+}
+
+char *number(char *buf, char *end, unsigned long num, int base, int size, int precision, int type)
+{
+	char c,sign,tmp[66];
+	const char *digits;
+	static const char small_digits[] = "0123456789abcdefghijklmnopqrstuvwxyz";
+	static const char large_digits[] = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ";
+	int i;
+
+	digits = (type & PRINTF_LARGE) ? large_digits : small_digits;
+	if (type & PRINTF_LEFT)
+		type &= ~PRINTF_ZEROPAD;
+	if (base < 2 || base > 36)
+		return NULL;
+	c = (type & PRINTF_ZEROPAD) ? '0' : ' ';
+	sign = 0;
+	if (type & PRINTF_SIGN) {
+		if ((signed long) num < 0) {
+			sign = '-';
+			num = - (signed long) num;
+			size--;
+		} else if (type & PRINTF_PLUS) {
+			sign = '+';
+			size--;
+		} else if (type & PRINTF_SPACE) {
+			sign = ' ';
+			size--;
+		}
+	}
+	if (type & PRINTF_SPECIAL) {
+		if (base == 16)
+			size -= 2;
+		else if (base == 8)
+			size--;
+	}
+	i = 0;
+	if (num == 0)
+		tmp[i++]='0';
+	else while (num != 0) {
+		tmp[i++] = digits[num % base];
+		num = num / base;
+	}
+	if (i > precision)
+		precision = i;
+	size -= precision;
+	if (!(type&(PRINTF_ZEROPAD+PRINTF_LEFT))) {
+		while(size-->0) {
+			if (buf < end)
+				*buf = ' ';
+			++buf;
+		}
+	}
+	if (sign) {
+		if (buf < end)
+			*buf = sign;
+		++buf;
+	}
+	if (type & PRINTF_SPECIAL) {
+		if (base==8) {
+			if (buf < end)
+				*buf = '0';
+			++buf;
+		} else if (base==16) {
+			if (buf < end)
+				*buf = '0';
+			++buf;
+			if (buf < end)
+				*buf = digits[33];
+			++buf;
+		}
+	}
+	if (!(type & PRINTF_LEFT)) {
+		while (size-- > 0) {
+			if (buf < end)
+				*buf = c;
+			++buf;
+		}
+	}
+	while (i < precision--) {
+		if (buf < end)
+			*buf = '0';
+		++buf;
+	}
+	while (i-- > 0) {
+		if (buf < end)
+			*buf = tmp[i];
+		++buf;
+	}
+	while (size-- > 0) {
+		if (buf < end)
+			*buf = ' ';
+		++buf;
+	}
+	return buf;
+}
+
+/**
+ * vscnprintf - Format a string and place it in a buffer
+ * @buf: The buffer to place the result into
+ * @size: The size of the buffer, including the trailing null space
+ * @fmt: The format string to use
+ * @args: Arguments for the format string
+ *
+ * The return value is the number of characters which have been written into
+ * the @buf not including the trailing '\0'. If @size is <= 0 the function
+ * returns 0.
+ *
+ * Call this function if you are already dealing with a va_list.
+ * You probably want scnprintf() instead.
+ */
+int vscnprintf(char *buf, size_t size, const char *fmt, va_list args)
+{
+	int i;
+
+	i=vsnprintf(buf,size,fmt,args);
+	return (i >= size) ? (size - 1) : i;
+}
+
+
+/**
+ * snprintf - Format a string and place it in a buffer
+ * @buf: The buffer to place the result into
+ * @size: The size of the buffer, including the trailing null space
+ * @fmt: The format string to use
+ * @...: Arguments for the format string
+ *
+ * The return value is the number of characters which would be
+ * generated for the given input, excluding the trailing null,
+ * as per ISO C99.  If the return is greater than or equal to
+ * @size, the resulting string is truncated.
+ */
+int snprintf(char * buf, size_t size, const char *fmt, ...)
+{
+	va_list args;
+	int i;
+
+	va_start(args, fmt);
+	i=vsnprintf(buf,size,fmt,args);
+	va_end(args);
+	return i;
+}
+
+/**
+ * scnprintf - Format a string and place it in a buffer
+ * @buf: The buffer to place the result into
+ * @size: The size of the buffer, including the trailing null space
+ * @fmt: The format string to use
+ * @...: Arguments for the format string
+ *
+ * The return value is the number of characters written into @buf not including
+ * the trailing '\0'. If @size is <= 0 the function returns 0.
+ */
+
+int scnprintf(char * buf, size_t size, const char *fmt, ...)
+{
+	va_list args;
+	int i;
+
+	va_start(args, fmt);
+	i = vsnprintf(buf, size, fmt, args);
+	va_end(args);
+	return (i >= size) ? (size - 1) : i;
+}
+
+/**
+ * vsprintf - Format a string and place it in a buffer
+ * @buf: The buffer to place the result into
+ * @fmt: The format string to use
+ * @args: Arguments for the format string
+ *
+ * The function returns the number of characters written
+ * into @buf. Use vsnprintf() or vscnprintf() in order to avoid
+ * buffer overflows.
+ *
+ * Call this function if you are already dealing with a va_list.
+ * You probably want sprintf() instead.
+ */
+int vsprintf(char *buf, const char *fmt, va_list args)
+{
+	return vsnprintf(buf, INT_MAX, fmt, args);
+}
+
+/**
+ * sprintf - Format a string and place it in a buffer
+ * @buf: The buffer to place the result into
+ * @fmt: The format string to use
+ * @...: Arguments for the format string
+ *
+ * The function returns the number of characters written
+ * into @buf. Use snprintf() or scnprintf() in order to avoid
+ * buffer overflows.
+ */
+int sprintf(char * buf, const char *fmt, ...)
+{
+	va_list args;
+	int i;
+
+	va_start(args, fmt);
+	i=vsnprintf(buf, INT_MAX, fmt, args);
+	va_end(args);
+	return i;
+}
+
+/* From linux/lib/ctype.c, Copyright (C) 1991, 1992  Linus Torvalds */
+const unsigned char _ctype[] = {
+_C,_C,_C,_C,_C,_C,_C,_C,				/* 0-7 */
+_C,_C|_S,_C|_S,_C|_S,_C|_S,_C|_S,_C,_C,			/* 8-15 */
+_C,_C,_C,_C,_C,_C,_C,_C,				/* 16-23 */
+_C,_C,_C,_C,_C,_C,_C,_C,				/* 24-31 */
+_S|_SP,_P,_P,_P,_P,_P,_P,_P,				/* 32-39 */
+_P,_P,_P,_P,_P,_P,_P,_P,				/* 40-47 */
+_D,_D,_D,_D,_D,_D,_D,_D,				/* 48-55 */
+_D,_D,_P,_P,_P,_P,_P,_P,				/* 56-63 */
+_P,_U|_X,_U|_X,_U|_X,_U|_X,_U|_X,_U|_X,_U,		/* 64-71 */
+_U,_U,_U,_U,_U,_U,_U,_U,				/* 72-79 */
+_U,_U,_U,_U,_U,_U,_U,_U,				/* 80-87 */
+_U,_U,_U,_P,_P,_P,_P,_P,				/* 88-95 */
+_P,_L|_X,_L|_X,_L|_X,_L|_X,_L|_X,_L|_X,_L,		/* 96-103 */
+_L,_L,_L,_L,_L,_L,_L,_L,				/* 104-111 */
+_L,_L,_L,_L,_L,_L,_L,_L,				/* 112-119 */
+_L,_L,_L,_P,_P,_P,_P,_C,				/* 120-127 */
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,			/* 128-143 */
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,			/* 144-159 */
+_S|_SP,_P,_P,_P,_P,_P,_P,_P,_P,_P,_P,_P,_P,_P,_P,_P,	/* 160-175 */
+_P,_P,_P,_P,_P,_P,_P,_P,_P,_P,_P,_P,_P,_P,_P,_P,	/* 176-191 */
+_U,_U,_U,_U,_U,_U,_U,_U,_U,_U,_U,_U,_U,_U,_U,_U,	/* 192-207 */
+_U,_U,_U,_U,_U,_U,_U,_P,_U,_U,_U,_U,_U,_U,_U,_L,	/* 208-223 */
+_L,_L,_L,_L,_L,_L,_L,_L,_L,_L,_L,_L,_L,_L,_L,_L,	/* 224-239 */
+_L,_L,_L,_L,_L,_L,_L,_P,_L,_L,_L,_L,_L,_L,_L,_L};	/* 240-255 */
+
+/**
+ * rand - Returns a pseudo random number
+ */
+
+static unsigned int randseed;
+unsigned int rand(void)
+{
+	randseed = 129 * randseed + 907633385;
+	return randseed;
+}
+
+void srand(unsigned int seed)
+{
+	randseed = seed;
+}
+
+__attribute__ ((used)) void abort(void)
+{
+	printf("Aborted.");
+	while(1);
+}
+
+uint32_t htonl(uint32_t n)
+{
+	union { int i; char c; } u = { 1 };
+	return u.c ? bswap_32(n) : n;
+}
+
+uint16_t htons(uint16_t n)
+{
+	union { int i; char c; } u = { 1 };
+	return u.c ? bswap_16(n) : n;
+}
+
+uint32_t ntohl(uint32_t n)
+{
+	union { int i; char c; } u = { 1 };
+	return u.c ? bswap_32(n) : n;
+}
+
+uint16_t ntohs(uint16_t n)
+{
+	union { int i; char c; } u = { 1 };
+	return u.c ? bswap_16(n) : n;
+}
diff --git a/third_party/libbase/qsort.c b/third_party/libbase/qsort.c
new file mode 100644
index 0000000..4df3987
--- /dev/null
+++ b/third_party/libbase/qsort.c
@@ -0,0 +1,215 @@
+/****************************************************************************
+ * lib/stdlib/lib_qsort.c
+ *
+ *   Copyright (C) 2007, 2009, 2011 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+ *
+ * Leveraged from:
+ *
+ *  Copyright (c) 1992, 1993
+ *  The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *    This product includes software developed by the University of
+ *    California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+#include <stdlib.h>
+
+#define min(a, b)  (a) < (b) ? a : b
+
+#define swapcode(TYPE, parmi, parmj, n) \
+  { \
+    long i = (n) / sizeof (TYPE); \
+    register TYPE *pi = (TYPE *) (parmi); \
+    register TYPE *pj = (TYPE *) (parmj); \
+    do { \
+      register TYPE  t = *pi; \
+      *pi++ = *pj; \
+      *pj++ = t; \
+    } while (--i > 0); \
+  }
+
+#define SWAPINIT(a, size) \
+  swaptype = ((char *)a - (char *)0) % sizeof(long) || \
+  size % sizeof(long) ? 2 : size == sizeof(long)? 0 : 1;
+
+#define swap(a, b) \
+  if (swaptype == 0) \
+    { \
+      long t = *(long *)(a); \
+      *(long *)(a) = *(long *)(b); \
+      *(long *)(b) = t; \
+    } \
+  else \
+    { \
+      swapfunc(a, b, size, swaptype); \
+    }
+
+#define vecswap(a, b, n) if ((n) > 0) swapfunc(a, b, n, swaptype)
+
+static inline void swapfunc(char *a, char *b, int n, int swaptype);
+static inline char *med3(char *a, char *b, char *c,
+                         int (*compar)(const void *, const void *));
+
+static inline void swapfunc(char *a, char *b, int n, int swaptype)
+{
+  if(swaptype <= 1)
+    {
+      swapcode(long, a, b, n)
+    }
+  else
+    {
+      swapcode(char, a, b, n)
+    }
+}
+
+static inline char *med3(char *a, char *b, char *c,
+                         int (*compar)(const void *, const void *))
+{
+  return compar(a, b) < 0 ?
+         (compar(b, c) < 0 ? b : (compar(a, c) < 0 ? c : a ))
+              :(compar(b, c) > 0 ? b : (compar(a, c) < 0 ? a : c ));
+}
+
+/****************************************************************************
+ * Name: qsort
+ *
+ * Description:
+ *   Qsort routine from Bentley & McIlroy's "Engineering a Sort Function".
+ *
+ ****************************************************************************/
+
+void qsort(void *base, size_t nmemb, size_t size,
+           int(*compar)(const void *, const void *))
+{
+  char *pa, *pb, *pc, *pd, *pl, *pm, *pn;
+  int d, r, swaptype, swap_cnt;
+
+loop:
+  SWAPINIT(base, size);
+  swap_cnt = 0;
+  if (nmemb < 7)
+    {
+      for (pm = (char *) base + size; pm < (char *) base + nmemb * size; pm += size)
+        {
+          for (pl = pm; pl > (char *) base && compar(pl - size, pl) > 0; pl -= size)
+            {
+              swap(pl, pl - size);
+            }
+        }
+      return;
+  }
+
+  pm = (char *) base + (nmemb / 2) * size;
+  if (nmemb > 7)
+    {
+      pl = base;
+      pn = (char *) base + (nmemb - 1) * size;
+      if (nmemb > 40)
+        {
+          d = (nmemb / 8) * size;
+          pl = med3(pl, pl + d, pl + 2 * d, compar);
+          pm = med3(pm - d, pm, pm + d, compar);
+          pn = med3(pn - 2 * d, pn - d, pn, compar);
+        }
+      pm = med3(pl, pm, pn, compar);
+    }
+  swap(base, pm);
+  pa = pb = (char *) base + size;
+
+  pc = pd = (char *) base + (nmemb - 1) * size;
+  for (;;)
+    {
+      while (pb <= pc && (r = compar(pb, base)) <= 0)
+        {
+          if (r == 0)
+            {
+              swap_cnt = 1;
+              swap(pa, pb);
+              pa += size;
+            }
+          pb += size;
+        }
+      while (pb <= pc && (r = compar(pc, base)) >= 0)
+        {
+          if (r == 0)
+            {
+              swap_cnt = 1;
+              swap(pc, pd);
+              pd -= size;
+            }
+          pc -= size;
+        }
+
+      if (pb > pc)
+        {
+          break;
+        }
+
+      swap(pb, pc);
+      swap_cnt = 1;
+      pb += size;
+      pc -= size;
+    }
+
+  if (swap_cnt == 0)
+    {
+      /* Switch to insertion sort */
+
+      for (pm = (char *) base + size; pm < (char *) base + nmemb * size; pm += size)
+        {
+          for (pl = pm; pl > (char *) base && compar(pl - size, pl) > 0; pl -= size)
+            {
+              swap(pl, pl - size);
+            }
+        }
+      return;
+    }
+
+  pn = (char *) base + nmemb * size;
+  r = min(pa - (char *)base, pb - pa);
+  vecswap(base, pb - r, r);
+  r = min(pd - pc, pn - pd - size);
+  vecswap(pb, pn - r, r);
+
+  if ((r = pb - pa) > size)
+    {
+      qsort(base, r / size, size, compar);
+    }
+
+  if ((r = pd - pc) > size)
+    {
+      /* Iterate rather than recurse to save stack space */
+      base = pn - r;
+      nmemb = r / size;
+      goto loop;
+    }
+}
+
diff --git a/third_party/libbase/spiflash.c b/third_party/libbase/spiflash.c
new file mode 100644
index 0000000..31d56a1
--- /dev/null
+++ b/third_party/libbase/spiflash.c
@@ -0,0 +1,141 @@
+#include <generated/csr.h>
+
+#if (defined CSR_SPIFLASH_BASE && defined SPIFLASH_PAGE_SIZE)
+
+#include <spiflash.h>
+
+#define PAGE_PROGRAM_CMD 0x02
+#define WRDI_CMD         0x04
+#define RDSR_CMD         0x05
+#define WREN_CMD         0x06
+#define SE_CMD           0xd8
+
+#define BITBANG_CLK         (1 << 1)
+#define BITBANG_CS_N        (1 << 2)
+#define BITBANG_DQ_INPUT    (1 << 3)
+
+#define SR_WIP              1
+
+static void flash_write_byte(unsigned char b);
+static void flash_write_addr(unsigned int addr);
+static void wait_for_device_ready(void);
+
+#define min(a,b)  (a>b?b:a)
+
+static void flash_write_byte(unsigned char b)
+{
+    int i;
+    spiflash_bitbang_write(0); // ~CS_N ~CLK
+
+    for(i = 0; i < 8; i++, b <<= 1) {
+
+        spiflash_bitbang_write((b & 0x80) >> 7);
+        spiflash_bitbang_write(((b & 0x80) >> 7) | BITBANG_CLK);
+    }
+
+    spiflash_bitbang_write(0); // ~CS_N ~CLK
+
+}
+
+static void flash_write_addr(unsigned int addr)
+{
+    int i;
+    spiflash_bitbang_write(0);
+
+    for(i = 0; i < 24; i++, addr <<= 1) {
+        spiflash_bitbang_write((addr & 0x800000) >> 23);
+        spiflash_bitbang_write(((addr & 0x800000) >> 23) | BITBANG_CLK);
+    }
+
+    spiflash_bitbang_write(0);
+}
+
+static void wait_for_device_ready(void)
+{
+    unsigned char sr;
+    unsigned char i;
+    do {
+        sr = 0;
+        flash_write_byte(RDSR_CMD);
+        spiflash_bitbang_write(BITBANG_DQ_INPUT);
+        for(i = 0; i < 8; i++) {
+            sr <<= 1;
+            spiflash_bitbang_write(BITBANG_CLK | BITBANG_DQ_INPUT);
+            sr |= spiflash_miso_read();
+            spiflash_bitbang_write(0           | BITBANG_DQ_INPUT);
+        }
+        spiflash_bitbang_write(0);
+        spiflash_bitbang_write(BITBANG_CS_N);
+    } while(sr & SR_WIP);
+}
+
+void erase_flash_sector(unsigned int addr)
+{
+    unsigned int sector_addr = addr & ~(SPIFLASH_SECTOR_SIZE - 1);
+
+    spiflash_bitbang_en_write(1);
+
+    wait_for_device_ready();
+
+    flash_write_byte(WREN_CMD);
+    spiflash_bitbang_write(BITBANG_CS_N);
+
+    flash_write_byte(SE_CMD);
+    flash_write_addr(sector_addr);
+    spiflash_bitbang_write(BITBANG_CS_N);
+
+    wait_for_device_ready();
+
+    spiflash_bitbang_en_write(0);
+}
+
+void write_to_flash_page(unsigned int addr, const unsigned char *c, unsigned int len)
+{
+    unsigned int i;
+
+    if(len > SPIFLASH_PAGE_SIZE)
+        len = SPIFLASH_PAGE_SIZE;
+
+    spiflash_bitbang_en_write(1);
+
+    wait_for_device_ready();
+
+    flash_write_byte(WREN_CMD);
+    spiflash_bitbang_write(BITBANG_CS_N);
+    flash_write_byte(PAGE_PROGRAM_CMD);
+    flash_write_addr((unsigned int)addr);
+    for(i = 0; i < len; i++)
+        flash_write_byte(*c++);
+
+    spiflash_bitbang_write(BITBANG_CS_N);
+    spiflash_bitbang_write(0);
+
+    wait_for_device_ready();
+
+    spiflash_bitbang_en_write(0);
+}
+
+#define SPIFLASH_PAGE_MASK (SPIFLASH_PAGE_SIZE - 1)
+
+void write_to_flash(unsigned int addr, const unsigned char *c, unsigned int len)
+{
+   unsigned int written = 0;
+
+   if(addr & SPIFLASH_PAGE_MASK) {
+       written = min(SPIFLASH_PAGE_SIZE - (addr & SPIFLASH_PAGE_MASK), len);
+       write_to_flash_page(addr, c, written);
+       c += written;
+       addr += written;
+       len -= written;
+   }
+
+   while(len > 0) {
+       written = min(len, SPIFLASH_PAGE_SIZE);
+       write_to_flash_page(addr, c, written);
+       c += written;
+       addr += written;
+       len -= written;
+   }
+}
+
+#endif /* CSR_SPIFLASH_BASE && SPIFLASH_PAGE_SIZE */
diff --git a/third_party/libbase/strcasecmp.c b/third_party/libbase/strcasecmp.c
new file mode 100644
index 0000000..c7edcc0
--- /dev/null
+++ b/third_party/libbase/strcasecmp.c
@@ -0,0 +1,61 @@
+/****************************************************************************
+ * libc/string/lib_strcasecmp.c
+ *
+ *   Copyright (C) 2008-2009, 2011 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ *****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ *****************************************************************************/
+
+#include <string.h>
+#include <ctype.h>
+
+/****************************************************************************
+ * Public Functions
+ *****************************************************************************/
+
+int strcasecmp(const char *cs, const char *ct)
+{
+  int result;
+  for (;;)
+    {
+      if ((result = (int)toupper(*cs) - (int)toupper(*ct)) != 0 || !*cs)
+        {
+          break;
+        }
+
+      cs++;
+      ct++;
+    }
+  return result;
+}
diff --git a/third_party/libbase/strtod.c b/third_party/libbase/strtod.c
new file mode 100644
index 0000000..e79a1ee
--- /dev/null
+++ b/third_party/libbase/strtod.c
@@ -0,0 +1,234 @@
+/****************************************************************************
+ * lib/string/lib_strtod.c
+ * Convert string to double
+ *
+ *   Copyright (C) 2002 Michael Ringgaard. All rights reserved.
+ *   Copyright (C) 2006-2007 H. Peter Anvin.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the project nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+ * OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <stdlib.h>
+#include <ctype.h>
+#include <errno.h>
+
+/****************************************************************************
+ * Pre-processor definitions
+ ****************************************************************************/
+
+/* These are predefined with GCC, but could be issues for other compilers. If
+ * not defined, an arbitrary big number is put in for now.  These should be
+ * added to nuttx/compiler for your compiler.
+ */
+
+#if !defined(__DBL_MIN_EXP__) || !defined(__DBL_MAX_EXP__)
+#  ifdef CONFIG_CPP_HAVE_WARNING
+#    warning "Size of exponent is unknown"
+#  endif
+#  undef  __DBL_MIN_EXP__
+#  define __DBL_MIN_EXP__ (-1021)
+#  undef  __DBL_MAX_EXP__
+#  define __DBL_MAX_EXP__ (1024)
+#endif
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+static inline int is_real(double x)
+{
+  const double infinite = 1.0/0.0;
+  return (x < infinite) && (x >= -infinite);
+}
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/***************************************************(************************
+ * Name: strtod
+ *
+ * Description:
+ *   Convert a string to a double value
+ *
+ ****************************************************************************/
+
+double strtod(const char *str, char **endptr)
+{
+  double number;
+  int exponent;
+  int negative;
+  char *p = (char *) str;
+  double p10;
+  int n;
+  int num_digits;
+  int num_decimals;
+  const double infinite = 1.0/0.0;
+
+  /* Skip leading whitespace */
+
+  while (isspace(*p))
+    {
+      p++;
+    }
+
+  /* Handle optional sign */
+
+  negative = 0;
+  switch (*p)
+    {
+    case '-':
+      negative = 1; /* Fall through to increment position */
+    case '+':
+      p++;
+    }
+
+  number       = 0.;
+  exponent     = 0;
+  num_digits   = 0;
+  num_decimals = 0;
+
+  /* Process string of digits */
+
+  while (isdigit(*p))
+    {
+      number = number * 10. + (*p - '0');
+      p++;
+      num_digits++;
+    }
+
+  /* Process decimal part */
+
+  if (*p == '.')
+    {
+      p++;
+
+      while (isdigit(*p))
+      {
+        number = number * 10. + (*p - '0');
+        p++;
+        num_digits++;
+        num_decimals++;
+      }
+
+      exponent -= num_decimals;
+    }
+
+  if (num_digits == 0)
+    {
+      errno = ERANGE;
+      return 0.0;
+    }
+
+  /* Correct for sign */
+
+  if (negative)
+    {
+      number = -number;
+    }
+
+  /* Process an exponent string */
+
+  if (*p == 'e' || *p == 'E')
+    {
+      /* Handle optional sign */
+
+      negative = 0;
+      switch(*++p)
+        {
+        case '-':
+          negative = 1;   /* Fall through to increment pos */
+        case '+':
+          p++;
+        }
+
+      /* Process string of digits */
+
+      n = 0;
+      while (isdigit(*p))
+        {
+          n = n * 10 + (*p - '0');
+          p++;
+        }
+
+      if (negative)
+        {
+          exponent -= n;
+        }
+      else
+        {
+          exponent += n;
+        }
+    }
+
+  if (exponent < __DBL_MIN_EXP__ ||
+      exponent > __DBL_MAX_EXP__)
+    {
+      errno = ERANGE;
+      return infinite;
+    }
+
+  /* Scale the result */
+
+  p10 = 10.;
+  n = exponent;
+  if (n < 0) n = -n;
+  while (n)
+    {
+      if (n & 1)
+        {
+          if (exponent < 0)
+            {
+              number /= p10;
+            }
+          else
+            {
+              number *= p10;
+            }
+        }
+      n >>= 1;
+      p10 *= p10;
+    }
+
+  if (!is_real(number))
+    {
+      errno = ERANGE;
+    }
+
+  if (endptr)
+    {
+      *endptr = p;
+    }
+
+  return number;
+}
+
diff --git a/third_party/libbase/system.c b/third_party/libbase/system.c
new file mode 100644
index 0000000..3fa1fc2
--- /dev/null
+++ b/third_party/libbase/system.c
@@ -0,0 +1,111 @@
+#include <irq.h>
+#include <uart.h>
+#ifdef __or1k__
+#include <spr-defs.h>
+#endif
+
+#if defined (__vexriscv__)
+#include <csr-defs.h>
+#endif
+
+#include <system.h>
+#include <generated/mem.h>
+#include <generated/csr.h>
+
+void flush_cpu_icache(void)
+{
+#if defined (__lm32__)
+	asm volatile(
+		"wcsr ICC, r0\n"
+		"nop\n"
+		"nop\n"
+		"nop\n"
+		"nop\n"
+	);
+#elif defined (__or1k__)
+	unsigned long iccfgr;
+	unsigned long cache_set_size;
+	unsigned long cache_ways;
+	unsigned long cache_block_size;
+	unsigned long cache_size;
+	int i;
+
+	iccfgr = mfspr(SPR_ICCFGR);
+	cache_ways = 1 << (iccfgr & SPR_ICCFGR_NCW);
+	cache_set_size = 1 << ((iccfgr & SPR_ICCFGR_NCS) >> 3);
+	cache_block_size = (iccfgr & SPR_ICCFGR_CBS) ? 32 : 16;
+	cache_size = cache_set_size * cache_ways * cache_block_size;
+
+	for (i = 0; i < cache_size; i += cache_block_size)
+		mtspr(SPR_ICBIR, i);
+#elif defined (__picorv32__)
+	/* no instruction cache */
+	asm volatile("nop");
+#elif defined (__vexriscv__)
+	asm volatile(
+		".word(0x400F)\n"
+		"nop\n"
+		"nop\n"
+		"nop\n"
+		"nop\n"
+		"nop\n"
+	);
+#elif defined (__minerva__)
+	/* no instruction cache */
+	asm volatile("nop");
+#else
+#error Unsupported architecture
+#endif
+}
+
+void flush_cpu_dcache(void)
+{
+#if defined (__lm32__)
+	asm volatile(
+		"wcsr DCC, r0\n"
+		"nop\n"
+	);
+#elif defined (__or1k__)
+	unsigned long dccfgr;
+	unsigned long cache_set_size;
+	unsigned long cache_ways;
+	unsigned long cache_block_size;
+	unsigned long cache_size;
+	int i;
+
+	dccfgr = mfspr(SPR_DCCFGR);
+	cache_ways = 1 << (dccfgr & SPR_ICCFGR_NCW);
+	cache_set_size = 1 << ((dccfgr & SPR_DCCFGR_NCS) >> 3);
+	cache_block_size = (dccfgr & SPR_DCCFGR_CBS) ? 32 : 16;
+	cache_size = cache_set_size * cache_ways * cache_block_size;
+
+	for (i = 0; i < cache_size; i += cache_block_size)
+		mtspr(SPR_DCBIR, i);
+#elif defined (__picorv32__)
+	/* no data cache */
+	asm volatile("nop");
+#elif defined (__vexriscv__)
+	unsigned long cache_info;
+	asm volatile ("csrr %0, %1" : "=r"(cache_info) : "i"(CSR_DCACHE_INFO));
+	unsigned long cache_way_size = cache_info & 0xFFFFF;
+	unsigned long cache_line_size = (cache_info >> 20) & 0xFFF;
+	for(register unsigned long idx = 0;idx < cache_way_size;idx += cache_line_size){
+		asm volatile("mv x10, %0 \n .word(0b01110000000001010101000000001111)"::"r"(idx));
+	}
+#elif defined (__minerva__)
+	/* no data cache */
+	asm volatile("nop");
+#else
+#error Unsupported architecture
+#endif
+}
+
+#ifdef L2_SIZE
+void flush_l2_cache(void)
+{
+	unsigned int i;
+	for(i=0;i<2*L2_SIZE/4;i++) {
+		((volatile unsigned int *) MAIN_RAM_BASE)[i];
+	}
+}
+#endif
diff --git a/third_party/libbase/time.c b/third_party/libbase/time.c
new file mode 100644
index 0000000..9f7f1db
--- /dev/null
+++ b/third_party/libbase/time.c
@@ -0,0 +1,33 @@
+#include <generated/csr.h>
+#include <time.h>
+
+void time_init(void)
+{
+	int t;
+
+	timer0_en_write(0);
+	t = 2*SYSTEM_CLOCK_FREQUENCY;
+	timer0_reload_write(t);
+	timer0_load_write(t);
+	timer0_en_write(1);
+}
+
+int elapsed(int *last_event, int period)
+{
+	int t, dt;
+
+	timer0_update_value_write(1);
+	t = timer0_reload_read() - timer0_value_read();
+	if(period < 0) {
+		*last_event = t;
+		return 1;
+	}
+	dt = t - *last_event;
+	if(dt < 0)
+		dt += timer0_reload_read();
+	if((dt > period) || (dt < 0)) {
+		*last_event = t;
+		return 1;
+	} else
+		return 0;
+}
diff --git a/third_party/libbase/uart.c b/third_party/libbase/uart.c
new file mode 100644
index 0000000..921459f
--- /dev/null
+++ b/third_party/libbase/uart.c
@@ -0,0 +1,110 @@
+#include <uart.h>
+#include <irq.h>
+#include <generated/csr.h>
+#include <hw/flags.h>
+
+/*
+ * Buffer sizes must be a power of 2 so that modulos can be computed
+ * with logical AND.
+ */
+
+#define UART_RINGBUFFER_SIZE_RX 128
+#define UART_RINGBUFFER_MASK_RX (UART_RINGBUFFER_SIZE_RX-1)
+
+static char rx_buf[UART_RINGBUFFER_SIZE_RX];
+static volatile unsigned int rx_produce;
+static unsigned int rx_consume;
+
+#define UART_RINGBUFFER_SIZE_TX 128
+#define UART_RINGBUFFER_MASK_TX (UART_RINGBUFFER_SIZE_TX-1)
+
+static char tx_buf[UART_RINGBUFFER_SIZE_TX];
+static unsigned int tx_produce;
+static volatile unsigned int tx_consume;
+
+void uart_isr(void)
+{
+	unsigned int stat, rx_produce_next;
+
+	stat = uart_ev_pending_read();
+
+	if(stat & UART_EV_RX) {
+		while(!uart_rxempty_read()) {
+			rx_produce_next = (rx_produce + 1) & UART_RINGBUFFER_MASK_RX;
+			if(rx_produce_next != rx_consume) {
+				rx_buf[rx_produce] = uart_rxtx_read();
+				rx_produce = rx_produce_next;
+			}
+			uart_ev_pending_write(UART_EV_RX);
+		}
+	}
+
+	if(stat & UART_EV_TX) {
+		uart_ev_pending_write(UART_EV_TX);
+		while((tx_consume != tx_produce) && !uart_txfull_read()) {
+			uart_rxtx_write(tx_buf[tx_consume]);
+			tx_consume = (tx_consume + 1) & UART_RINGBUFFER_MASK_TX;
+		}
+	}
+}
+
+/* Do not use in interrupt handlers! */
+char uart_read(void)
+{
+	char c;
+
+	if(irq_getie()) {
+		while(rx_consume == rx_produce);
+	} else if (rx_consume == rx_produce) {
+		return 0;
+	}
+
+	c = rx_buf[rx_consume];
+	rx_consume = (rx_consume + 1) & UART_RINGBUFFER_MASK_RX;
+	return c;
+}
+
+int uart_read_nonblock(void)
+{
+	return (rx_consume != rx_produce);
+}
+
+void uart_write(char c)
+{
+	unsigned int oldmask;
+	unsigned int tx_produce_next = (tx_produce + 1) & UART_RINGBUFFER_MASK_TX;
+
+	if(irq_getie()) {
+		while(tx_produce_next == tx_consume);
+	} else if(tx_produce_next == tx_consume) {
+		return;
+	}
+
+	oldmask = irq_getmask();
+	irq_setmask(oldmask & ~(1 << UART_INTERRUPT));
+	if((tx_consume != tx_produce) || uart_txfull_read()) {
+		tx_buf[tx_produce] = c;
+		tx_produce = tx_produce_next;
+	} else {
+		uart_rxtx_write(c);
+	}
+	irq_setmask(oldmask);
+}
+
+void uart_init(void)
+{
+	rx_produce = 0;
+	rx_consume = 0;
+
+	tx_produce = 0;
+	tx_consume = 0;
+
+	uart_ev_pending_write(uart_ev_pending_read());
+	uart_ev_enable_write(UART_EV_TX | UART_EV_RX);
+	irq_setmask(irq_getmask() | (1 << UART_INTERRUPT));
+}
+
+void uart_sync(void)
+{
+	while(tx_consume != tx_produce);
+}
diff --git a/third_party/libbase/vsnprintf.c b/third_party/libbase/vsnprintf.c
new file mode 100644
index 0000000..e056d32
--- /dev/null
+++ b/third_party/libbase/vsnprintf.c
@@ -0,0 +1,318 @@
+/*
+ * MiSoC
+ * Copyright (C) 2007, 2008, 2009 Sebastien Bourdeauducq
+ * Copyright (C) Linux kernel developers
+ *
+ * This program 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, version 3 of the License.
+ *
+ * This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <stdarg.h>
+#include <string.h>
+#include <ctype.h>
+#include <math.h>
+
+/**
+ * vsnprintf - Format a string and place it in a buffer
+ * @buf: The buffer to place the result into
+ * @size: The size of the buffer, including the trailing null space
+ * @fmt: The format string to use
+ * @args: Arguments for the format string
+ *
+ * The return value is the number of characters which would
+ * be generated for the given input, excluding the trailing
+ * '\0', as per ISO C99. If you want to have the exact
+ * number of characters written into @buf as return value
+ * (not including the trailing '\0'), use vscnprintf(). If the
+ * return is greater than or equal to @size, the resulting
+ * string is truncated.
+ *
+ * Call this function if you are already dealing with a va_list.
+ * You probably want snprintf() instead.
+ */
+int vsnprintf(char *buf, size_t size, const char *fmt, va_list args)
+{
+	int len;
+	unsigned long long num;
+	int i, base;
+	char *str, *end, c;
+	const char *s;
+
+	int flags;		/* flags to number() */
+
+	int field_width;	/* width of output field */
+	int precision;		/* min. # of digits for integers; max
+				   number of chars for from string */
+	int qualifier;		/* 'h', 'l', or 'L' for integer fields */
+				/* 'z' support added 23/7/1999 S.H.    */
+				/* 'z' changed to 'Z' --davidm 1/25/99 */
+				/* 't' added for ptrdiff_t */
+
+	/* Reject out-of-range values early.  Large positive sizes are
+	   used for unknown buffer sizes. */
+	if (unlikely((int) size < 0))
+		return 0;
+
+	str = buf;
+	end = buf + size;
+
+	/* Make sure end is always >= buf */
+	if (end < buf) {
+		end = ((void *)-1);
+		size = end - buf;
+	}
+
+	for (; *fmt ; ++fmt) {
+		if (*fmt != '%') {
+			if (str < end)
+				*str = *fmt;
+			++str;
+			continue;
+		}
+
+		/* process flags */
+		flags = 0;
+		repeat:
+			++fmt;		/* this also skips first '%' */
+			switch (*fmt) {
+				case '-': flags |= PRINTF_LEFT; goto repeat;
+				case '+': flags |= PRINTF_PLUS; goto repeat;
+				case ' ': flags |= PRINTF_SPACE; goto repeat;
+				case '#': flags |= PRINTF_SPECIAL; goto repeat;
+				case '0': flags |= PRINTF_ZEROPAD; goto repeat;
+			}
+
+		/* get field width */
+		field_width = -1;
+		if (isdigit(*fmt))
+			field_width = skip_atoi(&fmt);
+		else if (*fmt == '*') {
+			++fmt;
+			/* it's the next argument */
+			field_width = va_arg(args, int);
+			if (field_width < 0) {
+				field_width = -field_width;
+				flags |= PRINTF_LEFT;
+			}
+		}
+
+		/* get the precision */
+		precision = -1;
+		if (*fmt == '.') {
+			++fmt;
+			if (isdigit(*fmt))
+				precision = skip_atoi(&fmt);
+			else if (*fmt == '*') {
+				++fmt;
+				/* it's the next argument */
+				precision = va_arg(args, int);
+			}
+			if (precision < 0)
+				precision = 0;
+		}
+
+		/* get the conversion qualifier */
+		qualifier = -1;
+		if (*fmt == 'h' || *fmt == 'l' || *fmt == 'L' ||
+		    *fmt =='Z' || *fmt == 'z' || *fmt == 't') {
+			qualifier = *fmt;
+			++fmt;
+			if (qualifier == 'l' && *fmt == 'l') {
+				qualifier = 'L';
+				++fmt;
+			}
+		}
+
+		/* default base */
+		base = 10;
+
+		switch (*fmt) {
+			case 'c':
+				if (!(flags & PRINTF_LEFT)) {
+					while (--field_width > 0) {
+						if (str < end)
+							*str = ' ';
+						++str;
+					}
+				}
+				c = (unsigned char) va_arg(args, int);
+				if (str < end)
+					*str = c;
+				++str;
+				while (--field_width > 0) {
+					if (str < end)
+						*str = ' ';
+					++str;
+				}
+				continue;
+
+			case 's':
+				s = va_arg(args, char *);
+				if (s == NULL)
+					s = "<NULL>";
+
+				len = strnlen(s, precision);
+
+				if (!(flags & PRINTF_LEFT)) {
+					while (len < field_width--) {
+						if (str < end)
+							*str = ' ';
+						++str;
+					}
+				}
+				for (i = 0; i < len; ++i) {
+					if (str < end)
+						*str = *s;
+					++str; ++s;
+				}
+				while (len < field_width--) {
+					if (str < end)
+						*str = ' ';
+					++str;
+				}
+				continue;
+
+			case 'p':
+				if (field_width == -1) {
+					field_width = 2*sizeof(void *);
+					flags |= PRINTF_ZEROPAD;
+				}
+				str = number(str, end,
+						(unsigned long) va_arg(args, void *),
+						16, field_width, precision, flags);
+				continue;
+
+#ifndef NO_FLOAT
+			case 'g':
+			case 'f': {
+			  double f, g;
+
+				f = va_arg(args, double);
+				if(f < 0.0) {
+					if(str < end)
+						*str = '-';
+					str++;
+					f = -f;
+				}
+
+				g = pow(10.0, floor(log10(f)));
+				if(g < 1.0) {
+					if(str < end)
+						*str = '0';
+					str++;
+				}
+				while(g >= 1.0) {
+					if(str < end)
+						*str = '0' + fmod(f/g, 10.0);
+					str++;
+					g /= 10.0;
+				}
+
+				if(str < end)
+					*str = '.';
+				str++;
+
+				for(i=0;i<6;i++) {
+					f = fmod(f*10.0, 10.0);
+					if(str < end)
+						*str = '0' + f;
+					str++;
+				}
+
+				continue;
+			}
+#endif
+
+			case 'n':
+				/* FIXME:
+				 * What does C99 say about the overflow case here? */
+				if (qualifier == 'l') {
+					long * ip = va_arg(args, long *);
+					*ip = (str - buf);
+				} else if (qualifier == 'Z' || qualifier == 'z') {
+					size_t * ip = va_arg(args, size_t *);
+					*ip = (str - buf);
+				} else {
+					int * ip = va_arg(args, int *);
+					*ip = (str - buf);
+				}
+				continue;
+
+			case '%':
+				if (str < end)
+					*str = '%';
+				++str;
+				continue;
+
+				/* integer number formats - set up the flags and "break" */
+			case 'o':
+				base = 8;
+				break;
+
+			case 'X':
+				flags |= PRINTF_LARGE;
+			case 'x':
+				base = 16;
+				break;
+
+			case 'd':
+			case 'i':
+				flags |= PRINTF_SIGN;
+			case 'u':
+				break;
+
+			default:
+				if (str < end)
+					*str = '%';
+				++str;
+				if (*fmt) {
+					if (str < end)
+						*str = *fmt;
+					++str;
+				} else {
+					--fmt;
+				}
+				continue;
+		}
+		if (qualifier == 'L')
+			num = va_arg(args, long long);
+		else if (qualifier == 'l') {
+			num = va_arg(args, unsigned long);
+			if (flags & PRINTF_SIGN)
+				num = (signed long) num;
+		} else if (qualifier == 'Z' || qualifier == 'z') {
+			num = va_arg(args, size_t);
+		} else if (qualifier == 't') {
+			num = va_arg(args, ptrdiff_t);
+		} else if (qualifier == 'h') {
+			num = (unsigned short) va_arg(args, int);
+			if (flags & PRINTF_SIGN)
+				num = (signed short) num;
+		} else {
+			num = va_arg(args, unsigned int);
+			if (flags & PRINTF_SIGN)
+				num = (signed int) num;
+		}
+		str = number(str, end, num, base,
+				field_width, precision, flags);
+	}
+	if (size > 0) {
+		if (str < end)
+			*str = '\0';
+		else
+			end[-1] = '\0';
+	}
+	/* the trailing null byte doesn't count towards the total */
+	return str-buf;
+}