openadk/toolchain/musl/patches/1.1.14/musl.xtensa

From be7942d8dbce223ed6a75dfdf8d2cd1beb04e2eb Mon Sep 17 00:00:00 2001
From: Max Filippov <jcmvbkbc@gmail.com>
Date: Tue, 22 Mar 2016 02:35:58 +0300
Subject: [PATCH 242/242] xtensa: add port

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Waldemar Brodkorb <wbx@uclibc-ng.org>
---
 arch/xtensa/atomic_arch.h             |  30 ++
 arch/xtensa/bits/alltypes.h.in        |  30 ++
 arch/xtensa/bits/endian.h             |   7 +
 arch/xtensa/bits/float.h              |  16 +
 arch/xtensa/bits/ioctl.h              | 227 ++++++++++++
 arch/xtensa/bits/limits.h             |   7 +
 arch/xtensa/bits/mman.h               |  57 +++
 arch/xtensa/bits/posix.h              |   2 +
 arch/xtensa/bits/reg.h                |   2 +
 arch/xtensa/bits/setjmp.h             |   1 +
 arch/xtensa/bits/signal.h             |  88 +++++
 arch/xtensa/bits/stat.h               |  21 ++
 arch/xtensa/bits/stdint.h             |  20 +
 arch/xtensa/bits/syscall.h            | 679 ++++++++++++++++++++++++++++++++++
 arch/xtensa/bits/termios.h            | 168 +++++++++
 arch/xtensa/bits/user.h               |   4 +
 arch/xtensa/bits/xtensa-config.h      |  46 +++
 arch/xtensa/crt_arch.h                |  26 ++
 arch/xtensa/pthread_arch.h            |  11 +
 arch/xtensa/reloc.h                   |  21 ++
 arch/xtensa/syscall_arch.h            | 102 +++++
 configure                             |   1 +
 crt/xtensa/crti.s                     |  11 +
 crt/xtensa/crtn.s                     |   5 +
 include/elf.h                         |  58 +++
 ldso/dlstart.c                        |  13 +-
 ldso/dynlink.c                        |  41 +-
 src/internal/xtensa/syscall.s         |  15 +
 src/ldso/xtensa/tlsdesc.s             |  22 ++
 src/setjmp/xtensa/longjmp.s           |  73 ++++
 src/setjmp/xtensa/setjmp.s            |  13 +
 src/signal/xtensa/restore.s           |  10 +
 src/signal/xtensa/sigsetjmp.s         |  69 ++++
 src/signal/xtensa/windowspill.s       |  78 ++++
 src/thread/xtensa/__set_thread_area.s |   8 +
 src/thread/xtensa/__unmapself.s       |  10 +
 src/thread/xtensa/clone.s             |  39 ++
 src/thread/xtensa/syscall_cp.s        |  37 ++
 38 files changed, 2066 insertions(+), 2 deletions(-)
 create mode 100644 arch/xtensa/atomic_arch.h
 create mode 100644 arch/xtensa/bits/alltypes.h.in
 create mode 100644 arch/xtensa/bits/endian.h
 create mode 100644 arch/xtensa/bits/float.h
 create mode 100644 arch/xtensa/bits/ioctl.h
 create mode 100644 arch/xtensa/bits/limits.h
 create mode 100644 arch/xtensa/bits/mman.h
 create mode 100644 arch/xtensa/bits/posix.h
 create mode 100644 arch/xtensa/bits/reg.h
 create mode 100644 arch/xtensa/bits/setjmp.h
 create mode 100644 arch/xtensa/bits/signal.h
 create mode 100644 arch/xtensa/bits/stat.h
 create mode 100644 arch/xtensa/bits/stdint.h
 create mode 100644 arch/xtensa/bits/syscall.h
 create mode 100644 arch/xtensa/bits/termios.h
 create mode 100644 arch/xtensa/bits/user.h
 create mode 100644 arch/xtensa/bits/xtensa-config.h
 create mode 100644 arch/xtensa/crt_arch.h
 create mode 100644 arch/xtensa/pthread_arch.h
 create mode 100644 arch/xtensa/reloc.h
 create mode 100644 arch/xtensa/syscall_arch.h
 create mode 100644 crt/xtensa/crti.s
 create mode 100644 crt/xtensa/crtn.s
 create mode 100644 src/internal/xtensa/syscall.s
 create mode 100644 src/ldso/xtensa/tlsdesc.s
 create mode 100644 src/setjmp/xtensa/longjmp.s
 create mode 100644 src/setjmp/xtensa/setjmp.s
 create mode 100644 src/signal/xtensa/restore.s
 create mode 100644 src/signal/xtensa/sigsetjmp.s
 create mode 100644 src/signal/xtensa/windowspill.s
 create mode 100644 src/thread/xtensa/__set_thread_area.s
 create mode 100644 src/thread/xtensa/__unmapself.s
 create mode 100644 src/thread/xtensa/clone.s
 create mode 100644 src/thread/xtensa/syscall_cp.s

diff --git a/arch/xtensa/atomic_arch.h b/arch/xtensa/atomic_arch.h
new file mode 100644
index 0000000..476814b
--- /dev/null
+++ b/arch/xtensa/atomic_arch.h
@@ -0,0 +1,30 @@
+#ifndef _INTERNAL_ATOMIC_H
+#define _INTERNAL_ATOMIC_H
+
+#include <stdint.h>
+
+#define a_cas a_cas
+static inline int a_cas(volatile int *p, int t, int s)
+{
+	__asm__ __volatile__(
+		"	wsr	%1, scompare1\n"
+		"	s32c1i	%0, %2, 0\n"
+		: "+a"(s)
+		: "a"(t), "a"(p)
+		: "memory" );
+        return s;
+}
+
+#define a_barrier a_barrier
+static inline void a_barrier()
+{
+	__asm__ __volatile__ ("memw" : : : "memory");
+}
+
+#define a_crash a_crash
+static inline void a_crash()
+{
+	__asm__ __volatile__ ("ill" : : : "memory");
+}
+
+#endif
diff --git a/arch/xtensa/bits/alltypes.h.in b/arch/xtensa/bits/alltypes.h.in
new file mode 100644
index 0000000..1e2a8c1
--- /dev/null
+++ b/arch/xtensa/bits/alltypes.h.in
@@ -0,0 +1,30 @@
+#define _Addr int
+#define _Int64 long long
+#define _Reg int
+
+TYPEDEF __builtin_va_list va_list;
+TYPEDEF __builtin_va_list __isoc_va_list;
+
+#ifndef __cplusplus
+#ifdef __WCHAR_TYPE__
+TYPEDEF __WCHAR_TYPE__ wchar_t;
+#else
+TYPEDEF unsigned wchar_t;
+#endif
+#endif
+
+TYPEDEF float float_t;
+TYPEDEF double double_t;
+
+TYPEDEF struct { long long __ll; long double __ld; } max_align_t;
+
+TYPEDEF long time_t;
+TYPEDEF long suseconds_t;
+
+TYPEDEF struct { union { int __i[9]; volatile int __vi[9]; unsigned __s[9]; } __u; } pthread_attr_t;
+TYPEDEF struct { union { int __i[6]; volatile int __vi[6]; volatile void *volatile __p[6]; } __u; } pthread_mutex_t;
+TYPEDEF struct { union { int __i[6]; volatile int __vi[6]; volatile void *volatile __p[6]; } __u; } mtx_t;
+TYPEDEF struct { union { int __i[12]; volatile int __vi[12]; void *__p[12]; } __u; } pthread_cond_t;
+TYPEDEF struct { union { int __i[12]; volatile int __vi[12]; void *__p[12]; } __u; } cnd_t;
+TYPEDEF struct { union { int __i[8]; volatile int __vi[8]; void *__p[8]; } __u; } pthread_rwlock_t;
+TYPEDEF struct { union { int __i[5]; volatile int __vi[5]; void *__p[5]; } __u; } pthread_barrier_t;
diff --git a/arch/xtensa/bits/endian.h b/arch/xtensa/bits/endian.h
new file mode 100644
index 0000000..d719907
--- /dev/null
+++ b/arch/xtensa/bits/endian.h
@@ -0,0 +1,7 @@
+#if __XTENSA_EB__
+#define __BYTE_ORDER __BIG_ENDIAN
+#elif __XTENSA_EL__
+#define __BYTE_ORDER __LITTLE_ENDIAN
+#else
+#error Unknown endianness
+#endif
diff --git a/arch/xtensa/bits/float.h b/arch/xtensa/bits/float.h
new file mode 100644
index 0000000..c4a655e
--- /dev/null
+++ b/arch/xtensa/bits/float.h
@@ -0,0 +1,16 @@
+#define FLT_EVAL_METHOD 0
+
+#define LDBL_TRUE_MIN 4.94065645841246544177e-324L
+#define LDBL_MIN 2.22507385850720138309e-308L
+#define LDBL_MAX 1.79769313486231570815e+308L
+#define LDBL_EPSILON 2.22044604925031308085e-16L
+
+#define LDBL_MANT_DIG 53
+#define LDBL_MIN_EXP (-1021)
+#define LDBL_MAX_EXP 1024
+
+#define LDBL_DIG 15
+#define LDBL_MIN_10_EXP (-307)
+#define LDBL_MAX_10_EXP 308
+
+#define DECIMAL_DIG 17
diff --git a/arch/xtensa/bits/ioctl.h b/arch/xtensa/bits/ioctl.h
new file mode 100644
index 0000000..e1ab80e
--- /dev/null
+++ b/arch/xtensa/bits/ioctl.h
@@ -0,0 +1,227 @@
+#define _IOC(a,b,c,d) ( ((a)<<30) | ((b)<<8) | (c) | ((d)<<16) )
+#define _IOC_NONE  0U
+#define _IOC_READ  2U
+#define _IOC_WRITE 1U
+
+#define _IO(a,b) _IOC(_IOC_NONE,(a),(b),0)
+#define _IOW(a,b,c) _IOC(_IOC_WRITE,(a),(b),sizeof(c))
+#define _IOR(a,b,c) _IOC(_IOC_READ,(a),(b),sizeof(c))
+#define _IOWR(a,b,c) _IOC(_IOC_READ|_IOC_WRITE,(a),(b),sizeof(c))
+
+#define FIOCLEX		_IO('f', 1)
+#define FIONCLEX	_IO('f', 2)
+#define FIOASYNC	_IOW('f', 125, int)
+#define FIONBIO		_IOW('f', 126, int)
+#define FIONREAD	_IOR('f', 127, int)
+#define TIOCINQ		FIONREAD
+#define FIOQSIZE	_IOR('f', 128, loff_t)
+
+#define TCGETS		0x5401
+#define TCSETS		0x5402
+#define TCSETSW		0x5403
+#define TCSETSF		0x5404
+
+#define TCGETA		0x80127417	/* _IOR('t', 23, struct termio) */
+#define TCSETA		0x40127418	/* _IOW('t', 24, struct termio) */
+#define TCSETAW		0x40127419	/* _IOW('t', 25, struct termio) */
+#define TCSETAF		0x4012741C	/* _IOW('t', 28, struct termio) */
+
+#define TCSBRK		_IO('t', 29)
+#define TCXONC		_IO('t', 30)
+#define TCFLSH		_IO('t', 31)
+
+#define TIOCSWINSZ	0x40087467	/* _IOW('t', 103, struct winsize) */
+#define TIOCGWINSZ	0x80087468	/* _IOR('t', 104, struct winsize) */
+#define	TIOCSTART	_IO('t', 110)		/* start output, like ^Q */
+#define	TIOCSTOP	_IO('t', 111)		/* stop output, like ^S */
+#define TIOCOUTQ        _IOR('t', 115, int)     /* output queue size */
+
+#define TIOCSPGRP	_IOW('t', 118, int)
+#define TIOCGPGRP	_IOR('t', 119, int)
+
+#define TIOCEXCL	_IO('T', 12)
+#define TIOCNXCL	_IO('T', 13)
+#define TIOCSCTTY	_IO('T', 14)
+
+#define TIOCSTI		_IOW('T', 18, char)
+#define TIOCMGET	_IOR('T', 21, unsigned int)
+#define TIOCMBIS	_IOW('T', 22, unsigned int)
+#define TIOCMBIC	_IOW('T', 23, unsigned int)
+#define TIOCMSET	_IOW('T', 24, unsigned int)
+# define TIOCM_LE	0x001
+# define TIOCM_DTR	0x002
+# define TIOCM_RTS	0x004
+# define TIOCM_ST	0x008
+# define TIOCM_SR	0x010
+# define TIOCM_CTS	0x020
+# define TIOCM_CAR	0x040
+# define TIOCM_RNG	0x080
+# define TIOCM_DSR	0x100
+# define TIOCM_CD	TIOCM_CAR
+# define TIOCM_RI	TIOCM_RNG
+
+#define TIOCGSOFTCAR	_IOR('T', 25, unsigned int)
+#define TIOCSSOFTCAR	_IOW('T', 26, unsigned int)
+#define TIOCLINUX	_IOW('T', 28, char)
+#define TIOCCONS	_IO('T', 29)
+#define TIOCGSERIAL	0x803C541E	/*_IOR('T', 30, struct serial_struct)*/
+#define TIOCSSERIAL	0x403C541F	/*_IOW('T', 31, struct serial_struct)*/
+#define TIOCPKT		_IOW('T', 32, int)
+# define TIOCPKT_DATA		 0
+# define TIOCPKT_FLUSHREAD	 1
+# define TIOCPKT_FLUSHWRITE	 2
+# define TIOCPKT_STOP		 4
+# define TIOCPKT_START		 8
+# define TIOCPKT_NOSTOP		16
+# define TIOCPKT_DOSTOP		32
+# define TIOCPKT_IOCTL		64
+
+
+#define TIOCNOTTY	_IO('T', 34)
+#define TIOCSETD	_IOW('T', 35, int)
+#define TIOCGETD	_IOR('T', 36, int)
+#define TCSBRKP		_IOW('T', 37, int)   /* Needed for POSIX tcsendbreak()*/
+#define TIOCSBRK	_IO('T', 39) 	     /* BSD compatibility */
+#define TIOCCBRK	_IO('T', 40)	     /* BSD compatibility */
+#define TIOCGSID	_IOR('T', 41, pid_t) /* Return the session ID of FD*/
+#define TCGETS2		_IOR('T', 42, struct termios2)
+#define TCSETS2		_IOW('T', 43, struct termios2)
+#define TCSETSW2	_IOW('T', 44, struct termios2)
+#define TCSETSF2	_IOW('T', 45, struct termios2)
+#define TIOCGRS485	_IOR('T', 46, struct serial_rs485)
+#define TIOCSRS485	_IOWR('T', 47, struct serial_rs485)
+#define TIOCGPTN	_IOR('T',0x30, unsigned int) /* Get Pty Number (of pty-mux device) */
+#define TIOCSPTLCK	_IOW('T',0x31, int)  /* Lock/unlock Pty */
+#define TIOCGDEV	_IOR('T',0x32, unsigned int) /* Get primary device node of /dev/console */
+#define TIOCSIG		_IOW('T',0x36, int)  /* Generate signal on Pty slave */
+#define TIOCVHANGUP	_IO('T', 0x37)
+#define TIOCGPKT	_IOR('T', 0x38, int) /* Get packet mode state */
+#define TIOCGPTLCK	_IOR('T', 0x39, int) /* Get Pty lock state */
+#define TIOCGEXCL	_IOR('T', 0x40, int) /* Get exclusive mode state */
+
+#define TIOCSERCONFIG	_IO('T', 83)
+#define TIOCSERGWILD	_IOR('T', 84,  int)
+#define TIOCSERSWILD	_IOW('T', 85,  int)
+#define TIOCGLCKTRMIOS	0x5456
+#define TIOCSLCKTRMIOS	0x5457
+#define TIOCSERGSTRUCT	0x5458		     /* For debugging only */
+#define TIOCSERGETLSR   _IOR('T', 89, unsigned int) /* Get line status reg. */
+  /* ioctl (fd, TIOCSERGETLSR, &result) where result may be as below */
+# define TIOCSER_TEMT    0x01		     /* Transmitter physically empty */
+#define TIOCSERGETMULTI 0x80a8545a /* Get multiport config  */
+			/* _IOR('T', 90, struct serial_multiport_struct) */
+#define TIOCSERSETMULTI 0x40a8545b /* Set multiport config */
+			/* _IOW('T', 91, struct serial_multiport_struct) */
+
+#define TIOCMIWAIT	_IO('T', 92) /* wait for a change on serial input line(s) */
+#define TIOCGICOUNT	0x545D	/* read serial port inline interrupt counts */
+
+struct winsize {
+	unsigned short ws_row;
+	unsigned short ws_col;
+	unsigned short ws_xpixel;
+	unsigned short ws_ypixel;
+};
+
+#define TIOCM_LE        0x001
+#define TIOCM_DTR       0x002
+#define TIOCM_RTS       0x004
+#define TIOCM_ST        0x008
+#define TIOCM_SR        0x010
+#define TIOCM_CTS       0x020
+#define TIOCM_CAR       0x040
+#define TIOCM_RNG       0x080
+#define TIOCM_DSR       0x100
+#define TIOCM_CD        TIOCM_CAR
+#define TIOCM_RI        TIOCM_RNG
+#define TIOCM_OUT1      0x2000
+#define TIOCM_OUT2      0x4000
+#define TIOCM_LOOP      0x8000
+#define TIOCM_MODEM_BITS TIOCM_OUT2
+
+#define N_TTY           0
+#define N_SLIP          1
+#define N_MOUSE         2
+#define N_PPP           3
+#define N_STRIP         4
+#define N_AX25          5
+#define N_X25           6
+#define N_6PACK         7
+#define N_MASC          8
+#define N_R3964         9
+#define N_PROFIBUS_FDL  10
+#define N_IRDA          11
+#define N_SMSBLOCK      12
+#define N_HDLC          13
+#define N_SYNC_PPP      14
+#define N_HCI           15
+
+#define FIOGETOWN	_IOR('f', 123, int)
+#define FIOSETOWN 	_IOW('f', 124, int)
+#define SIOCATMARK	_IOR('s', 7, int)
+#define SIOCSPGRP	_IOW('s', 8, pid_t)
+#define SIOCGPGRP	_IOR('s', 9, pid_t)
+#define SIOCGSTAMP	0x8906		/* Get stamp (timeval) */
+#define SIOCGSTAMPNS	0x8907		/* Get stamp (timespec) */
+
+#define SIOCADDRT       0x890B
+#define SIOCDELRT       0x890C
+#define SIOCRTMSG       0x890D
+
+#define SIOCGIFNAME     0x8910
+#define SIOCSIFLINK     0x8911
+#define SIOCGIFCONF     0x8912
+#define SIOCGIFFLAGS    0x8913
+#define SIOCSIFFLAGS    0x8914
+#define SIOCGIFADDR     0x8915
+#define SIOCSIFADDR     0x8916
+#define SIOCGIFDSTADDR  0x8917
+#define SIOCSIFDSTADDR  0x8918
+#define SIOCGIFBRDADDR  0x8919
+#define SIOCSIFBRDADDR  0x891a
+#define SIOCGIFNETMASK  0x891b
+#define SIOCSIFNETMASK  0x891c
+#define SIOCGIFMETRIC   0x891d
+#define SIOCSIFMETRIC   0x891e
+#define SIOCGIFMEM      0x891f
+#define SIOCSIFMEM      0x8920
+#define SIOCGIFMTU      0x8921
+#define SIOCSIFMTU      0x8922
+#define SIOCSIFHWADDR   0x8924
+#define SIOCGIFENCAP    0x8925
+#define SIOCSIFENCAP    0x8926
+#define SIOCGIFHWADDR   0x8927
+#define SIOCGIFSLAVE    0x8929
+#define SIOCSIFSLAVE    0x8930
+#define SIOCADDMULTI    0x8931
+#define SIOCDELMULTI    0x8932
+#define SIOCGIFINDEX    0x8933
+#define SIOGIFINDEX     SIOCGIFINDEX
+#define SIOCSIFPFLAGS   0x8934
+#define SIOCGIFPFLAGS   0x8935
+#define SIOCDIFADDR     0x8936
+#define SIOCSIFHWBROADCAST 0x8937
+#define SIOCGIFCOUNT    0x8938
+
+#define SIOCGIFBR       0x8940
+#define SIOCSIFBR       0x8941
+
+#define SIOCGIFTXQLEN   0x8942
+#define SIOCSIFTXQLEN   0x8943
+
+#define SIOCDARP        0x8953
+#define SIOCGARP        0x8954
+#define SIOCSARP        0x8955
+
+#define SIOCDRARP       0x8960
+#define SIOCGRARP       0x8961
+#define SIOCSRARP       0x8962
+
+#define SIOCGIFMAP      0x8970
+#define SIOCSIFMAP      0x8971
+
+#define SIOCADDDLCI     0x8980
+#define SIOCDELDLCI     0x8981
+
+#define SIOCDEVPRIVATE		0x89F0
+#define SIOCPROTOPRIVATE	0x89E0
diff --git a/arch/xtensa/bits/limits.h b/arch/xtensa/bits/limits.h
new file mode 100644
index 0000000..fbc6d23
--- /dev/null
+++ b/arch/xtensa/bits/limits.h
@@ -0,0 +1,7 @@
+#if defined(_POSIX_SOURCE) || defined(_POSIX_C_SOURCE) \
+ || defined(_XOPEN_SOURCE) || defined(_GNU_SOURCE) || defined(_BSD_SOURCE)
+#define LONG_BIT 32
+#endif
+
+#define LONG_MAX  0x7fffffffL
+#define LLONG_MAX  0x7fffffffffffffffLL
diff --git a/arch/xtensa/bits/mman.h b/arch/xtensa/bits/mman.h
new file mode 100644
index 0000000..3125fc2
--- /dev/null
+++ b/arch/xtensa/bits/mman.h
@@ -0,0 +1,57 @@
+#define MAP_FAILED ((void *) -1)
+
+#define	PROT_NONE      0
+#define	PROT_READ      1
+#define	PROT_WRITE     2
+#define	PROT_EXEC      4
+#define	PROT_GROWSDOWN 0x01000000
+#define	PROT_GROWSUP   0x02000000
+
+#define	MAP_SHARED     0x01
+#define	MAP_PRIVATE    0x02
+#define	MAP_FIXED      0x10
+
+#define MAP_TYPE       0x0f
+#define MAP_FILE       0x00
+#define MAP_ANON       0x800
+#define MAP_ANONYMOUS  MAP_ANON
+#define MAP_NORESERVE  0x0400
+#define MAP_GROWSDOWN  0x1000
+#define MAP_DENYWRITE  0x2000
+#define MAP_EXECUTABLE 0x4000
+#define MAP_LOCKED     0x8000
+#define MAP_POPULATE   0x10000
+#define MAP_NONBLOCK   0x20000
+#define MAP_STACK      0x40000
+#define MAP_HUGETLB    0x80000
+
+#define POSIX_MADV_NORMAL       0
+#define POSIX_MADV_RANDOM       1
+#define POSIX_MADV_SEQUENTIAL   2
+#define POSIX_MADV_WILLNEED     3
+#define POSIX_MADV_DONTNEED     0
+
+#define MS_ASYNC        1
+#define MS_INVALIDATE   2
+#define MS_SYNC         4
+
+#define MCL_CURRENT     1
+#define MCL_FUTURE      2
+
+#if defined(_GNU_SOURCE) || defined(_BSD_SOURCE)
+#define MADV_NORMAL      0
+#define MADV_RANDOM      1
+#define MADV_SEQUENTIAL  2
+#define MADV_WILLNEED    3
+#define MADV_DONTNEED    4
+#define MADV_REMOVE      9
+#define MADV_DONTFORK    10
+#define MADV_DOFORK      11
+#define MADV_MERGEABLE   12
+#define MADV_UNMERGEABLE 13
+#define MADV_HUGEPAGE    14
+#define MADV_NOHUGEPAGE  15
+#define MADV_DONTDUMP    16
+#define MADV_DODUMP      17
+#define MADV_HWPOISON    100
+#endif
diff --git a/arch/xtensa/bits/posix.h b/arch/xtensa/bits/posix.h
new file mode 100644
index 0000000..30a3871
--- /dev/null
+++ b/arch/xtensa/bits/posix.h
@@ -0,0 +1,2 @@
+#define _POSIX_V6_ILP32_OFFBIG  1
+#define _POSIX_V7_ILP32_OFFBIG  1
diff --git a/arch/xtensa/bits/reg.h b/arch/xtensa/bits/reg.h
new file mode 100644
index 0000000..0192a29
--- /dev/null
+++ b/arch/xtensa/bits/reg.h
@@ -0,0 +1,2 @@
+#undef __WORDSIZE
+#define __WORDSIZE 32
diff --git a/arch/xtensa/bits/setjmp.h b/arch/xtensa/bits/setjmp.h
new file mode 100644
index 0000000..b2bd974
--- /dev/null
+++ b/arch/xtensa/bits/setjmp.h
@@ -0,0 +1 @@
+typedef unsigned long __jmp_buf[18];
diff --git a/arch/xtensa/bits/signal.h b/arch/xtensa/bits/signal.h
new file mode 100644
index 0000000..545ffd3
--- /dev/null
+++ b/arch/xtensa/bits/signal.h
@@ -0,0 +1,88 @@
+#if defined(_POSIX_SOURCE) || defined(_POSIX_C_SOURCE) \
+ || defined(_XOPEN_SOURCE) || defined(_GNU_SOURCE) || defined(_BSD_SOURCE)
+
+#if defined(_XOPEN_SOURCE) || defined(_GNU_SOURCE) || defined(_BSD_SOURCE)
+#define MINSIGSTKSZ 2048
+#define SIGSTKSZ 8192
+#endif
+
+typedef struct sigcontext
+{
+	unsigned long sc_pc;
+	unsigned long sc_ps;
+	unsigned long sc_lbeg;
+	unsigned long sc_lend;
+	unsigned long sc_lcount;
+	unsigned long sc_sar;
+	unsigned long sc_acclo;
+	unsigned long sc_acchi;
+	unsigned long sc_a[16];
+	void *sc_xtregs;
+} mcontext_t;
+
+struct sigaltstack {
+	void *ss_sp;
+	int ss_flags;
+	size_t ss_size;
+};
+
+typedef struct __ucontext {
+	unsigned long uc_flags;
+	struct __ucontext *uc_link;
+	stack_t uc_stack;
+	mcontext_t uc_mcontext;
+	sigset_t uc_sigmask;
+} ucontext_t;
+
+#define SA_NOCLDSTOP	0x00000001
+#define SA_NOCLDWAIT	0x00000002 /* not supported yet */
+#define SA_SIGINFO	0x00000004
+#define SA_ONSTACK	0x08000000
+#define SA_RESTART	0x10000000
+#define SA_NODEFER	0x40000000
+#define SA_RESETHAND	0x80000000
+
+#define SA_NOMASK	SA_NODEFER
+#define SA_ONESHOT	SA_RESETHAND
+
+#define SA_RESTORER	0x04000000
+
+#endif
+
+#define SIGHUP		 1
+#define SIGINT		 2
+#define SIGQUIT		 3
+#define SIGILL		 4
+#define SIGTRAP		 5
+#define SIGABRT		 6
+#define SIGIOT		 6
+#define SIGBUS		 7
+#define SIGFPE		 8
+#define SIGKILL		 9
+#define SIGUSR1		10
+#define SIGSEGV		11
+#define SIGUSR2		12
+#define SIGPIPE		13
+#define SIGALRM		14
+#define SIGTERM		15
+#define SIGSTKFLT	16
+#define SIGCHLD		17
+#define SIGCONT		18
+#define SIGSTOP		19
+#define SIGTSTP		20
+#define SIGTTIN		21
+#define SIGTTOU		22
+#define SIGURG		23
+#define SIGXCPU		24
+#define SIGXFSZ		25
+#define SIGVTALRM	26
+#define SIGPROF		27
+#define SIGWINCH	28
+#define SIGIO		29
+#define SIGPOLL		SIGIO
+/* #define SIGLOST		29 */
+#define SIGPWR		30
+#define SIGSYS		31
+#define	SIGUNUSED	31
+
+#define _NSIG 64
diff --git a/arch/xtensa/bits/stat.h b/arch/xtensa/bits/stat.h
new file mode 100644
index 0000000..24231f8
--- /dev/null
+++ b/arch/xtensa/bits/stat.h
@@ -0,0 +1,21 @@
+/* copied from kernel definition, but with padding replaced
+ * by the corresponding correctly-sized userspace types. */
+
+struct stat
+{
+	dev_t st_dev;
+	ino_t st_ino;
+	mode_t st_mode;
+	nlink_t st_nlink;
+	uid_t st_uid;
+	gid_t st_gid;
+	dev_t st_rdev;
+	off_t st_size;
+	blksize_t st_blksize;
+	long __st_padding1;
+	blkcnt_t st_blocks;
+	struct timespec st_atim;
+	struct timespec st_mtim;
+	struct timespec st_ctim;
+        long __st_padding2[2];
+};
diff --git a/arch/xtensa/bits/stdint.h b/arch/xtensa/bits/stdint.h
new file mode 100644
index 0000000..d1b2712
--- /dev/null
+++ b/arch/xtensa/bits/stdint.h
@@ -0,0 +1,20 @@
+typedef int32_t int_fast16_t;
+typedef int32_t int_fast32_t;
+typedef uint32_t uint_fast16_t;
+typedef uint32_t uint_fast32_t;
+
+#define INT_FAST16_MIN  INT32_MIN
+#define INT_FAST32_MIN  INT32_MIN
+
+#define INT_FAST16_MAX  INT32_MAX
+#define INT_FAST32_MAX  INT32_MAX
+
+#define UINT_FAST16_MAX UINT32_MAX
+#define UINT_FAST32_MAX UINT32_MAX
+
+#define INTPTR_MIN      INT32_MIN
+#define INTPTR_MAX      INT32_MAX
+#define UINTPTR_MAX     UINT32_MAX
+#define PTRDIFF_MIN     INT32_MIN
+#define PTRDIFF_MAX     INT32_MAX
+#define SIZE_MAX        UINT32_MAX
diff --git a/arch/xtensa/bits/syscall.h b/arch/xtensa/bits/syscall.h
new file mode 100644
index 0000000..df8c2ab
--- /dev/null
+++ b/arch/xtensa/bits/syscall.h
@@ -0,0 +1,679 @@
+#define __NR_spill				  0
+#define __NR_xtensa				  1
+#define __NR_available4				  2
+#define __NR_available5				  3
+#define __NR_available6				  4
+#define __NR_available7				  5
+#define __NR_available8				  6
+#define __NR_available9				  7
+#define __NR_open				  8
+#define __NR_close				  9
+#define __NR_dup				 10
+#define __NR_dup2				 11
+#define __NR_read				 12
+#define __NR_write				 13
+#define __NR_select				 14
+#define __NR_lseek				 15
+#define __NR_poll				 16
+#define __NR__llseek				 17
+#define __NR_epoll_wait				 18
+#define __NR_epoll_ctl				 19
+#define __NR_epoll_create			 20
+#define __NR_creat				 21
+#define __NR_truncate				 22
+#define __NR_ftruncate				 23
+#define __NR_readv				 24
+#define __NR_writev				 25
+#define __NR_fsync				 26
+#define __NR_fdatasync				 27
+#define __NR_truncate64				 28
+#define __NR_ftruncate64			 29
+#define __NR_pread64				 30
+#define __NR_pwrite64				 31
+#define __NR_link				 32
+#define __NR_rename				 33
+#define __NR_symlink				 34
+#define __NR_readlink				 35
+#define __NR_mknod				 36
+#define __NR_pipe				 37
+#define __NR_unlink				 38
+#define __NR_rmdir				 39
+#define __NR_mkdir				 40
+#define __NR_chdir				 41
+#define __NR_fchdir				 42
+#define __NR_getcwd				 43
+#define __NR_chmod				 44
+#define __NR_chown				 45
+#define __NR_stat				 46
+#define __NR_stat64				 47
+#define __NR_lchown				 48
+#define __NR_lstat				 49
+#define __NR_lstat64				 50
+#define __NR_available51			 51
+#define __NR_fchmod				 52
+#define __NR_fchown				 53
+#define __NR_fstat				 54
+#define __NR_fstat64				 55
+#define __NR_flock				 56
+#define __NR_access				 57
+#define __NR_umask				 58
+#define __NR_getdents				 59
+#define __NR_getdents64				 60
+#define __NR_fcntl64				 61
+#define __NR_fallocate				 62
+#define __NR_fadvise64_64			 63
+#define __NR_utime				 64	/* glibc 2.3.3 ?? */
+#define __NR_utimes				 65
+#define __NR_ioctl				 66
+#define __NR_fcntl				 67
+#define __NR_setxattr				 68
+#define __NR_getxattr				 69
+#define __NR_listxattr				 70
+#define __NR_removexattr			 71
+#define __NR_lsetxattr				 72
+#define __NR_lgetxattr				 73
+#define __NR_llistxattr				 74
+#define __NR_lremovexattr			 75
+#define __NR_fsetxattr				 76
+#define __NR_fgetxattr				 77
+#define __NR_flistxattr				 78
+#define __NR_fremovexattr			 79
+#define __NR_mmap2				 80
+#define __NR_munmap				 81
+#define __NR_mprotect				 82
+#define __NR_brk				 83
+#define __NR_mlock				 84
+#define __NR_munlock				 85
+#define __NR_mlockall				 86
+#define __NR_munlockall				 87
+#define __NR_mremap				 88
+#define __NR_msync				 89
+#define __NR_mincore				 90
+#define __NR_madvise				 91
+#define __NR_shmget				 92
+#define __NR_shmat				 93
+#define __NR_shmctl				 94
+#define __NR_shmdt				 95
+#define __NR_socket				 96
+#define __NR_setsockopt				 97
+#define __NR_getsockopt				 98
+#define __NR_shutdown				 99
+#define __NR_bind				100
+#define __NR_connect				101
+#define __NR_listen				102
+#define __NR_accept				103
+#define __NR_getsockname			104
+#define __NR_getpeername			105
+#define __NR_sendmsg				106
+#define __NR_recvmsg				107
+#define __NR_send				108
+#define __NR_recv				109
+#define __NR_sendto				110
+#define __NR_recvfrom				111
+#define __NR_socketpair				112
+#define __NR_sendfile				113
+#define __NR_sendfile64				114
+#define __NR_sendmmsg				115
+#define __NR_clone				116
+#define __NR_execve				117
+#define __NR_exit				118
+#define __NR_exit_group				119
+#define __NR_getpid				120
+#define __NR_wait4				121
+#define __NR_waitid				122
+#define __NR_kill				123
+#define __NR_tkill				124
+#define __NR_tgkill				125
+#define __NR_set_tid_address			126
+#define __NR_gettid				127
+#define __NR_setsid				128
+#define __NR_getsid				129
+#define __NR_prctl				130
+#define __NR_personality			131
+#define __NR_getpriority			132
+#define __NR_setpriority			133
+#define __NR_setitimer				134
+#define __NR_getitimer				135
+#define __NR_setuid				136
+#define __NR_getuid				137
+#define __NR_setgid				138
+#define __NR_getgid				139
+#define __NR_geteuid				140
+#define __NR_getegid				141
+#define __NR_setreuid				142
+#define __NR_setregid				143
+#define __NR_setresuid				144
+#define __NR_getresuid				145
+#define __NR_setresgid				146
+#define __NR_getresgid				147
+#define __NR_setpgid				148
+#define __NR_getpgid				149
+#define __NR_getppid				150
+#define __NR_getpgrp				151
+#define __NR_reserved152			152	/* set_thread_area */
+#define __NR_reserved153			153	/* get_thread_area */
+#define __NR_times				154
+#define __NR_acct				155
+#define __NR_sched_setaffinity			156
+#define __NR_sched_getaffinity			157
+#define __NR_capget				158
+#define __NR_capset				159
+#define __NR_ptrace				160
+#define __NR_semtimedop				161
+#define __NR_semget				162
+#define __NR_semop				163
+#define __NR_semctl				164
+#define __NR_available165			165
+#define __NR_msgget				166
+#define __NR_msgsnd				167
+#define __NR_msgrcv				168
+#define __NR_msgctl				169
+#define __NR_available170			170
+#define __NR_umount2				171
+#define __NR_mount				172
+#define __NR_swapon				173
+#define __NR_chroot				174
+#define __NR_pivot_root				175
+#define __NR_umount				176
+#define __NR_swapoff				177
+#define __NR_sync				178
+#define __NR_syncfs				179
+#define __NR_setfsuid				180
+#define __NR_setfsgid				181
+#define __NR_sysfs				182
+#define __NR_ustat				183
+#define __NR_statfs				184
+#define __NR_fstatfs				185
+#define __NR_statfs64				186
+#define __NR_fstatfs64				187
+#define __NR_setrlimit				188
+#define __NR_getrlimit				189
+#define __NR_getrusage				190
+#define __NR_futex				191
+#define __NR_gettimeofday			192
+#define __NR_settimeofday			193
+#define __NR_adjtimex				194
+#define __NR_nanosleep				195
+#define __NR_getgroups				196
+#define __NR_setgroups				197
+#define __NR_sethostname			198
+#define __NR_setdomainname			199
+#define __NR_syslog				200
+#define __NR_vhangup				201
+#define __NR_uselib				202
+#define __NR_reboot				203
+#define __NR_quotactl				204
+#define __NR_nfsservctl				205
+#define __NR__sysctl				206
+#define __NR_bdflush				207
+#define __NR_uname				208
+#define __NR_sysinfo				209
+#define __NR_init_module			210
+#define __NR_delete_module			211
+#define __NR_sched_setparam			212
+#define __NR_sched_getparam			213
+#define __NR_sched_setscheduler			214
+#define __NR_sched_getscheduler			215
+#define __NR_sched_get_priority_max		216
+#define __NR_sched_get_priority_min		217
+#define __NR_sched_rr_get_interval		218
+#define __NR_sched_yield			219
+#define __NR_available222			222
+#define __NR_restart_syscall			223
+#define __NR_sigaltstack			224
+#define __NR_rt_sigreturn			225
+#define __NR_rt_sigaction			226
+#define __NR_rt_sigprocmask			227
+#define __NR_rt_sigpending			228
+#define __NR_rt_sigtimedwait			229
+#define __NR_rt_sigqueueinfo			230
+#define __NR_rt_sigsuspend			231
+#define __NR_mq_open				232
+#define __NR_mq_unlink				233
+#define __NR_mq_timedsend			234
+#define __NR_mq_timedreceive			235
+#define __NR_mq_notify				236
+#define __NR_mq_getsetattr			237
+#define __NR_available238			238
+#define __NR_io_setup				239
+#define __NR_io_destroy				240
+#define __NR_io_submit				241
+#define __NR_io_getevents			242
+#define __NR_io_cancel				243
+#define __NR_clock_settime			244
+#define __NR_clock_gettime			245
+#define __NR_clock_getres			246
+#define __NR_clock_nanosleep			247
+#define __NR_timer_create			248
+#define __NR_timer_delete			249
+#define __NR_timer_settime			250
+#define __NR_timer_gettime			251
+#define __NR_timer_getoverrun			252
+#define __NR_reserved253			253
+#define __NR_lookup_dcookie			254
+#define __NR_available255			255
+#define __NR_add_key				256
+#define __NR_request_key			257
+#define __NR_keyctl				258
+#define __NR_available259			259
+#define __NR_readahead				260
+#define __NR_remap_file_pages			261
+#define __NR_migrate_pages			262
+#define __NR_mbind				263
+#define __NR_get_mempolicy			264
+#define __NR_set_mempolicy			265
+#define __NR_unshare				266
+#define __NR_move_pages				267
+#define __NR_splice				268
+#define __NR_tee				269
+#define __NR_vmsplice				270
+#define __NR_available271			271
+#define __NR_pselect6				272
+#define __NR_ppoll				273
+#define __NR_epoll_pwait			274
+#define __NR_epoll_create1			275
+#define __NR_inotify_init			276
+#define __NR_inotify_add_watch			277
+#define __NR_inotify_rm_watch			278
+#define __NR_inotify_init1			279
+#define __NR_getcpu				280
+#define __NR_kexec_load				281
+#define __NR_ioprio_set				282
+#define __NR_ioprio_get				283
+#define __NR_set_robust_list			284
+#define __NR_get_robust_list			285
+#define __NR_available286			286
+#define __NR_available287			287
+#define __NR_openat				288
+#define __NR_mkdirat				289
+#define __NR_mknodat				290
+#define __NR_unlinkat				291
+#define __NR_renameat				292
+#define __NR_linkat				293
+#define __NR_symlinkat				294
+#define __NR_readlinkat				295
+#define __NR_utimensat				296
+#define __NR_fchownat				297
+#define __NR_futimesat				298
+#define __NR_fstatat64				299
+#define __NR_fchmodat				300
+#define __NR_faccessat				301
+#define __NR_available302			302
+#define __NR_available303			303
+#define __NR_signalfd				304
+#define __NR_eventfd				306
+#define __NR_recvmmsg				307
+#define __NR_setns				308
+#define __NR_signalfd4				309
+#define __NR_dup3				310
+#define __NR_pipe2				311
+#define __NR_timerfd_create			312
+#define __NR_timerfd_settime			313
+#define __NR_timerfd_gettime			314
+#define __NR_available315			315
+#define __NR_eventfd2				316
+#define __NR_preadv				317
+#define __NR_pwritev				318
+#define __NR_available319			319
+#define __NR_fanotify_init			320
+#define __NR_fanotify_mark			321
+#define __NR_process_vm_readv			322
+#define __NR_process_vm_writev			323
+#define __NR_name_to_handle_at			324
+#define __NR_open_by_handle_at			325
+#define __NR_sync_file_range2			326
+#define __NR_perf_event_open			327
+#define __NR_rt_tgsigqueueinfo			328
+#define __NR_clock_adjtime			329
+#define __NR_prlimit64				330
+#define __NR_kcmp				331
+#define __NR_finit_module			332
+#define __NR_accept4				333
+#define __NR_sched_setattr			334
+#define __NR_sched_getattr			335
+#define __NR_renameat2				336
+#define __NR_seccomp				337
+#define __NR_getrandom				338
+#define __NR_memfd_create			339
+#define __NR_bpf				340
+#define __NR_execveat				341
+
+#define SYS_spill				  0
+#define SYS_xtensa				  1
+#define SYS_available4				  2
+#define SYS_available5				  3
+#define SYS_available6				  4
+#define SYS_available7				  5
+#define SYS_available8				  6
+#define SYS_available9				  7
+#define SYS_open				  8
+#define SYS_close				  9
+#define SYS_dup					 10
+#define SYS_dup2				 11
+#define SYS_read				 12
+#define SYS_write				 13
+#define SYS_select				 14
+#define SYS_lseek				 15
+#define SYS_poll				 16
+#define SYS__llseek				 17
+#define SYS_epoll_wait				 18
+#define SYS_epoll_ctl				 19
+#define SYS_epoll_create			 20
+#define SYS_creat				 21
+#define SYS_truncate				 22
+#define SYS_ftruncate				 23
+#define SYS_readv				 24
+#define SYS_writev				 25
+#define SYS_fsync				 26
+#define SYS_fdatasync				 27
+#define SYS_truncate64				 28
+#define SYS_ftruncate64				 29
+#define SYS_pread64				 30
+#define SYS_pwrite64				 31
+#define SYS_link				 32
+#define SYS_rename				 33
+#define SYS_symlink				 34
+#define SYS_readlink				 35
+#define SYS_mknod				 36
+#define SYS_pipe				 37
+#define SYS_unlink				 38
+#define SYS_rmdir				 39
+#define SYS_mkdir				 40
+#define SYS_chdir				 41
+#define SYS_fchdir				 42
+#define SYS_getcwd				 43
+#define SYS_chmod				 44
+#define SYS_chown				 45
+#define SYS_stat				 46
+#define SYS_stat64				 47
+#define SYS_lchown				 48
+#define SYS_lstat				 49
+#define SYS_lstat64				 50
+#define SYS_available51				 51
+#define SYS_fchmod				 52
+#define SYS_fchown				 53
+#define SYS_fstat				 54
+#define SYS_fstat64				 55
+#define SYS_flock				 56
+#define SYS_access				 57
+#define SYS_umask				 58
+#define SYS_getdents				 59
+#define SYS_getdents64				 60
+#define SYS_fcntl64				 61
+#define SYS_fallocate				 62
+#define SYS_fadvise64_64			 63
+#define SYS_utime				 64	/* glibc 2.3.3 ?? */
+#define SYS_utimes				 65
+#define SYS_ioctl				 66
+#define SYS_fcntl				 67
+#define SYS_setxattr				 68
+#define SYS_getxattr				 69
+#define SYS_listxattr				 70
+#define SYS_removexattr				 71
+#define SYS_lsetxattr				 72
+#define SYS_lgetxattr				 73
+#define SYS_llistxattr				 74
+#define SYS_lremovexattr			 75
+#define SYS_fsetxattr				 76
+#define SYS_fgetxattr				 77
+#define SYS_flistxattr				 78
+#define SYS_fremovexattr			 79
+#define SYS_mmap2				 80
+#define SYS_munmap				 81
+#define SYS_mprotect				 82
+#define SYS_brk					 83
+#define SYS_mlock				 84
+#define SYS_munlock				 85
+#define SYS_mlockall				 86
+#define SYS_munlockall				 87
+#define SYS_mremap				 88
+#define SYS_msync				 89
+#define SYS_mincore				 90
+#define SYS_madvise				 91
+#define SYS_shmget				 92
+#define SYS_shmat				 93
+#define SYS_shmctl				 94
+#define SYS_shmdt				 95
+#define SYS_socket				 96
+#define SYS_setsockopt				 97
+#define SYS_getsockopt				 98
+#define SYS_shutdown				 99
+#define SYS_bind				100
+#define SYS_connect				101
+#define SYS_listen				102
+#define SYS_accept				103
+#define SYS_getsockname				104
+#define SYS_getpeername				105
+#define SYS_sendmsg				106
+#define SYS_recvmsg				107
+#define SYS_send				108
+#define SYS_recv				109
+#define SYS_sendto				110
+#define SYS_recvfrom				111
+#define SYS_socketpair				112
+#define SYS_sendfile				113
+#define SYS_sendfile64				114
+#define SYS_sendmmsg				115
+#define SYS_clone				116
+#define SYS_execve				117
+#define SYS_exit				118
+#define SYS_exit_group				119
+#define SYS_getpid				120
+#define SYS_wait4				121
+#define SYS_waitid				122
+#define SYS_kill				123
+#define SYS_tkill				124
+#define SYS_tgkill				125
+#define SYS_set_tid_address			126
+#define SYS_gettid				127
+#define SYS_setsid				128
+#define SYS_getsid				129
+#define SYS_prctl				130
+#define SYS_personality				131
+#define SYS_getpriority				132
+#define SYS_setpriority				133
+#define SYS_setitimer				134
+#define SYS_getitimer				135
+#define SYS_setuid				136
+#define SYS_getuid				137
+#define SYS_setgid				138
+#define SYS_getgid				139
+#define SYS_geteuid				140
+#define SYS_getegid				141
+#define SYS_setreuid				142
+#define SYS_setregid				143
+#define SYS_setresuid				144
+#define SYS_getresuid				145
+#define SYS_setresgid				146
+#define SYS_getresgid				147
+#define SYS_setpgid				148
+#define SYS_getpgid				149
+#define SYS_getppid				150
+#define SYS_getpgrp				151
+#define SYS_reserved152				152	/* set_thread_area */
+#define SYS_reserved153				153	/* get_thread_area */
+#define SYS_times				154
+#define SYS_acct				155
+#define SYS_sched_setaffinity			156
+#define SYS_sched_getaffinity			157
+#define SYS_capget				158
+#define SYS_capset				159
+#define SYS_ptrace				160
+#define SYS_semtimedop				161
+#define SYS_semget				162
+#define SYS_semop				163
+#define SYS_semctl				164
+#define SYS_available165			165
+#define SYS_msgget				166
+#define SYS_msgsnd				167
+#define SYS_msgrcv				168
+#define SYS_msgctl				169
+#define SYS_available170			170
+#define SYS_umount2				171
+#define SYS_mount				172
+#define SYS_swapon				173
+#define SYS_chroot				174
+#define SYS_pivot_root				175
+#define SYS_umount				176
+#define SYS_swapoff				177
+#define SYS_sync				178
+#define SYS_syncfs				179
+#define SYS_setfsuid				180
+#define SYS_setfsgid				181
+#define SYS_sysfs				182
+#define SYS_ustat				183
+#define SYS_statfs				184
+#define SYS_fstatfs				185
+#define SYS_statfs64				186
+#define SYS_fstatfs64				187
+#define SYS_setrlimit				188
+#define SYS_getrlimit				189
+#define SYS_getrusage				190
+#define SYS_futex				191
+#define SYS_gettimeofday			192
+#define SYS_settimeofday			193
+#define SYS_adjtimex				194
+#define SYS_nanosleep				195
+#define SYS_getgroups				196
+#define SYS_setgroups				197
+#define SYS_sethostname				198
+#define SYS_setdomainname			199
+#define SYS_syslog				200
+#define SYS_vhangup				201
+#define SYS_uselib				202
+#define SYS_reboot				203
+#define SYS_quotactl				204
+#define SYS_nfsservctl				205
+#define SYS__sysctl				206
+#define SYS_bdflush				207
+#define SYS_uname				208
+#define SYS_sysinfo				209
+#define SYS_init_module				210
+#define SYS_delete_module			211
+#define SYS_sched_setparam			212
+#define SYS_sched_getparam			213
+#define SYS_sched_setscheduler			214
+#define SYS_sched_getscheduler			215
+#define SYS_sched_get_priority_max		216
+#define SYS_sched_get_priority_min		217
+#define SYS_sched_rr_get_interval		218
+#define SYS_sched_yield				219
+#define SYS_available222			222
+#define SYS_restart_syscall			223
+#define SYS_sigaltstack				224
+#define SYS_rt_sigreturn			225
+#define SYS_rt_sigaction			226
+#define SYS_rt_sigprocmask			227
+#define SYS_rt_sigpending			228
+#define SYS_rt_sigtimedwait			229
+#define SYS_rt_sigqueueinfo			230
+#define SYS_rt_sigsuspend			231
+#define SYS_mq_open				232
+#define SYS_mq_unlink				233
+#define SYS_mq_timedsend			234
+#define SYS_mq_timedreceive			235
+#define SYS_mq_notify				236
+#define SYS_mq_getsetattr			237
+#define SYS_available238			238
+#define SYS_io_setup				239
+#define SYS_io_destroy				240
+#define SYS_io_submit				241
+#define SYS_io_getevents			242
+#define SYS_io_cancel				243
+#define SYS_clock_settime			244
+#define SYS_clock_gettime			245
+#define SYS_clock_getres			246
+#define SYS_clock_nanosleep			247
+#define SYS_timer_create			248
+#define SYS_timer_delete			249
+#define SYS_timer_settime			250
+#define SYS_timer_gettime			251
+#define SYS_timer_getoverrun			252
+#define SYS_reserved253				253
+#define SYS_lookup_dcookie			254
+#define SYS_available255			255
+#define SYS_add_key				256
+#define SYS_request_key				257
+#define SYS_keyctl				258
+#define SYS_available259			259
+#define SYS_readahead				260
+#define SYS_remap_file_pages			261
+#define SYS_migrate_pages			262
+#define SYS_mbind				263
+#define SYS_get_mempolicy			264
+#define SYS_set_mempolicy			265
+#define SYS_unshare				266
+#define SYS_move_pages				267
+#define SYS_splice				268
+#define SYS_tee					269
+#define SYS_vmsplice				270
+#define SYS_available271			271
+#define SYS_pselect6				272
+#define SYS_ppoll				273
+#define SYS_epoll_pwait				274
+#define SYS_epoll_create1			275
+#define SYS_inotify_init			276
+#define SYS_inotify_add_watch			277
+#define SYS_inotify_rm_watch			278
+#define SYS_inotify_init1			279
+#define SYS_getcpu				280
+#define SYS_kexec_load				281
+#define SYS_ioprio_set				282
+#define SYS_ioprio_get				283
+#define SYS_set_robust_list			284
+#define SYS_get_robust_list			285
+#define SYS_available286			286
+#define SYS_available287			287
+#define SYS_openat				288
+#define SYS_mkdirat				289
+#define SYS_mknodat				290
+#define SYS_unlinkat				291
+#define SYS_renameat				292
+#define SYS_linkat				293
+#define SYS_symlinkat				294
+#define SYS_readlinkat				295
+#define SYS_utimensat				296
+#define SYS_fchownat				297
+#define SYS_futimesat				298
+#define SYS_fstatat64				299
+#define SYS_fchmodat				300
+#define SYS_faccessat				301
+#define SYS_available302			302
+#define SYS_available303			303
+#define SYS_signalfd				304
+#define SYS_eventfd				306
+#define SYS_recvmmsg				307
+#define SYS_setns				308
+#define SYS_signalfd4				309
+#define SYS_dup3				310
+#define SYS_pipe2				311
+#define SYS_timerfd_create			312
+#define SYS_timerfd_settime			313
+#define SYS_timerfd_gettime			314
+#define SYS_available315			315
+#define SYS_eventfd2				316
+#define SYS_preadv				317
+#define SYS_pwritev				318
+#define SYS_available319			319
+#define SYS_fanotify_init			320
+#define SYS_fanotify_mark			321
+#define SYS_process_vm_readv			322
+#define SYS_process_vm_writev			323
+#define SYS_name_to_handle_at			324
+#define SYS_open_by_handle_at			325
+#define SYS_sync_file_range2			326
+#define SYS_perf_event_open			327
+#define SYS_rt_tgsigqueueinfo			328
+#define SYS_clock_adjtime			329
+#define SYS_prlimit64				330
+#define SYS_kcmp				331
+#define SYS_finit_module			332
+#define SYS_accept4				333
+#define SYS_sched_setattr			334
+#define SYS_sched_getattr			335
+#define SYS_renameat2				336
+#define SYS_seccomp				337
+#define SYS_getrandom				338
+#define SYS_memfd_create			339
+#define SYS_bpf					340
+#define SYS_execveat				341
diff --git a/arch/xtensa/bits/termios.h b/arch/xtensa/bits/termios.h
new file mode 100644
index 0000000..f1b32e0
--- /dev/null
+++ b/arch/xtensa/bits/termios.h
@@ -0,0 +1,168 @@
+struct termios
+{
+	tcflag_t c_iflag;
+	tcflag_t c_oflag;
+	tcflag_t c_cflag;
+	tcflag_t c_lflag;
+	cc_t c_line;
+	cc_t c_cc[NCCS];
+	speed_t __c_ispeed;
+	speed_t __c_ospeed;
+};
+
+#define VINTR 0
+#define VQUIT 1
+#define VERASE 2
+#define VKILL 3
+#define VEOF 4
+#define VTIME 5
+#define VMIN 6
+#define VSWTC 7
+#define VSTART 8
+#define VSTOP 9
+#define VSUSP 10
+#define VEOL 11
+#define VREPRINT 12
+#define VDISCARD 13
+#define VWERASE 14
+#define VLNEXT 15
+#define VEOL2 16
+
+#define IGNBRK	0000001
+#define BRKINT	0000002
+#define IGNPAR	0000004
+#define PARMRK	0000010
+#define INPCK	0000020
+#define ISTRIP	0000040
+#define INLCR	0000100
+#define IGNCR	0000200
+#define ICRNL	0000400
+#define IUCLC	0001000
+#define IXON	0002000
+#define IXANY	0004000
+#define IXOFF	0010000
+#define IMAXBEL	0020000
+#define IUTF8	0040000
+
+#define OPOST	0000001
+#define OLCUC	0000002
+#define ONLCR	0000004
+#define OCRNL	0000010
+#define ONOCR	0000020
+#define ONLRET	0000040
+#define OFILL	0000100
+#define OFDEL	0000200
+#define NLDLY	0000400
+#define   NL0	0000000
+#define   NL1	0000400
+#define CRDLY	0003000
+#define   CR0	0000000
+#define   CR1	0001000
+#define   CR2	0002000
+#define   CR3	0003000
+#define TABDLY	0014000
+#define   TAB0	0000000
+#define   TAB1	0004000
+#define   TAB2	0010000
+#define   TAB3	0014000
+#define   XTABS	0014000
+#define BSDLY	0020000
+#define   BS0	0000000
+#define   BS1	0020000
+#define VTDLY	0040000
+#define   VT0	0000000
+#define   VT1	0040000
+#define FFDLY	0100000
+#define   FF0	0000000
+#define   FF1	0100000
+
+#define B0       0000000
+#define B50      0000001
+#define B75      0000002
+#define B110     0000003
+#define B134     0000004
+#define B150     0000005
+#define B200     0000006
+#define B300     0000007
+#define B600     0000010
+#define B1200    0000011
+#define B1800    0000012
+#define B2400    0000013
+#define B4800    0000014
+#define B9600    0000015
+#define B19200   0000016
+#define B38400   0000017
+#define EXTA     0000016
+#define EXTB     0000017
+
+#define BOTHER   0010000
+#define B57600   0010001
+#define B115200  0010002
+#define B230400  0010003
+#define B460800  0010004
+#define B500000  0010005
+#define B576000  0010006
+#define B921600  0010007
+#define B1000000 0010010
+#define B1152000 0010011
+#define B1500000 0010012
+#define B2000000 0010013
+#define B2500000 0010014
+#define B3000000 0010015
+#define B3500000 0010016
+#define B4000000 0010017
+
+#define CBAUD    0010017
+
+#define CSIZE  0000060
+#define CS5    0000000
+#define CS6    0000020
+#define CS7    0000040
+#define CS8    0000060
+#define CSTOPB 0000100
+#define CREAD  0000200
+#define PARENB 0000400
+#define PARODD 0001000
+#define HUPCL  0002000
+#define CLOCAL 0004000
+
+#define ISIG	0000001
+#define ICANON	0000002
+#define XCASE	0000004
+#define ECHO	0000010
+#define ECHOE	0000020
+#define ECHOK	0000040
+#define ECHONL	0000100
+#define NOFLSH	0000200
+#define TOSTOP	0000400
+#define ECHOCTL	0001000
+#define ECHOPRT	0002000
+#define ECHOKE	0004000
+#define FLUSHO	0010000
+#define PENDIN	0040000
+#define IEXTEN	0100000
+#define EXTPROC	0200000
+
+#define TCOOFF 0
+#define TCOON  1
+#define TCIOFF 2
+#define TCION  3
+
+#define TCIFLUSH  0
+#define TCOFLUSH  1
+#define TCIOFLUSH 2
+
+#define TCSANOW   0
+#define TCSADRAIN 1
+#define TCSAFLUSH 2
+
+#if defined(_GNU_SOURCE) || defined(_BSD_SOURCE)
+#define CBAUDEX 0010000
+#define CIBAUD   002003600000
+#define IBSHIFT 16
+#define CMSPAR   010000000000
+#define CRTSCTS  020000000000
+#define EXTPROC 0200000
+#define XTABS  0014000
+#define TIOCSER_TEMT 1
+#endif
diff --git a/arch/xtensa/bits/user.h b/arch/xtensa/bits/user.h
new file mode 100644
index 0000000..8ac7526
--- /dev/null
+++ b/arch/xtensa/bits/user.h
@@ -0,0 +1,4 @@
+#define ELF_NGREG 128
+#define ELF_NFPREG 18
+typedef unsigned long elf_greg_t, elf_gregset_t[ELF_NGREG];
+typedef unsigned int elf_fpreg_t, elf_fpregset_t[ELF_NFPREG];
diff --git a/arch/xtensa/bits/xtensa-config.h b/arch/xtensa/bits/xtensa-config.h
new file mode 100644
index 0000000..2e60af9
--- /dev/null
+++ b/arch/xtensa/bits/xtensa-config.h
@@ -0,0 +1,46 @@
+/* Xtensa configuration settings.
+   Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007
+   Free Software Foundation, Inc.
+   Contributed by Bob Wilson (bwilson@tensilica.com) at Tensilica.
+
+   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/>.  */
+
+#ifndef XTENSA_CONFIG_H
+#define XTENSA_CONFIG_H
+
+/* The macros defined here match those with the same names in the Xtensa
+   compile-time HAL (Hardware Abstraction Layer).  Please refer to the
+   Xtensa System Software Reference Manual for documentation of these
+   macros.  */
+
+/* The following macros reflect the default expectations for Xtensa
+   processor configurations that can run glibc.  If you want to try
+   building glibc for an Xtensa configuration that is missing these
+   options, you will at least need to change the values of these
+   macros.  */
+
+#undef XCHAL_HAVE_NSA
+#define XCHAL_HAVE_NSA			1
+
+#undef XCHAL_HAVE_LOOPS
+#define XCHAL_HAVE_LOOPS		1
+
+/* Assume the maximum number of AR registers.  This currently only affects
+   the __window_spill function, and it is always safe to flush extra.  */
+
+#undef XCHAL_NUM_AREGS
+#define XCHAL_NUM_AREGS			64
+
+#endif /* !XTENSA_CONFIG_H */
diff --git a/arch/xtensa/crt_arch.h b/arch/xtensa/crt_arch.h
new file mode 100644
index 0000000..dc6ddaa
--- /dev/null
+++ b/arch/xtensa/crt_arch.h
@@ -0,0 +1,26 @@
+__asm__(
+".begin no-transform\n"
+".text \n"
+".global _" START "\n"
+".global " START "\n"
+".type   _" START ", @function\n"
+".type   " START ", @function\n"
+"_" START ":\n"
+"" START ":\n"
+"	call0	2f\n"
+"1:\n"
+".align 4\n"
+".weak _DYNAMIC\n"
+".hidden _DYNAMIC\n"
+"	.literal .L0, _DYNAMIC\n"
+"	.literal .L1, 1b\n"
+"2:\n"
+"	mov	a6, a1\n"
+"	l32r	a7, .L0\n"
+"	l32r	a5, .L1\n"
+"	add	a7, a7, a0\n"
+"	sub	a7, a7, a5\n"
+"	movi	a0, 0\n"
+"	call4	" START "_c\n"
+".end no-transform\n"
+);
diff --git a/arch/xtensa/pthread_arch.h b/arch/xtensa/pthread_arch.h
new file mode 100644
index 0000000..35c752e
--- /dev/null
+++ b/arch/xtensa/pthread_arch.h
@@ -0,0 +1,11 @@
+static inline struct pthread *__pthread_self()
+{
+	register char *tp;
+	__asm__ __volatile__ ("rur %0, threadptr" : "=r" (tp));
+	return (pthread_t)(tp + 8 - sizeof(struct pthread));
+}
+
+#define TLS_ABOVE_TP
+#define TP_ADJ(p) ((char *)(p) + sizeof(struct pthread) - 8)
+
+#define MC_PC sc_pc
diff --git a/arch/xtensa/reloc.h b/arch/xtensa/reloc.h
new file mode 100644
index 0000000..bae93a5
--- /dev/null
+++ b/arch/xtensa/reloc.h
@@ -0,0 +1,21 @@
+#include <endian.h>
+
+#if __BYTE_ORDER == __BIG_ENDIAN
+#define ENDIAN_SUFFIX "eb"
+#else
+#define ENDIAN_SUFFIX ""
+#endif
+
+#define LDSO_ARCH "xtensa" ENDIAN_SUFFIX
+
+#define TPOFF_K 8
+
+#define REL_PLT         R_XTENSA_JMP_SLOT
+#define REL_RELATIVE    R_XTENSA_RELATIVE
+#define REL_GOT         R_XTENSA_GLOB_DAT
+#define REL_COPY        R_XTENSA_32
+#define REL_TPOFF       R_XTENSA_TLS_TPOFF
+//#define REL_TLSDESC     R_XTENSA_TLSDESC_FN
+
+#define CRTJMP(pc,sp) __asm__ __volatile__( \
+	"movsp a1, %1 ; jx %0" : : "a"(pc), "a"(sp) : "memory" )
diff --git a/arch/xtensa/syscall_arch.h b/arch/xtensa/syscall_arch.h
new file mode 100644
index 0000000..380ce17
--- /dev/null
+++ b/arch/xtensa/syscall_arch.h
@@ -0,0 +1,102 @@
+#define __SYSCALL_LL_E(x) \
+((union { long long ll; long l[2]; }){ .ll = x }).l[0], \
+((union { long long ll; long l[2]; }){ .ll = x }).l[1]
+#define __SYSCALL_LL_O(x) 0, __SYSCALL_LL_E((x))
+
+static inline long __syscall0(long n)
+{
+	register long a2 __asm__("a2") = n;
+
+	__asm__ __volatile__ ("syscall"
+			      : "+&a"(a2)
+			      :
+			      : "memory");
+	return a2;
+}
+
+static inline long __syscall1(long n, long a)
+{
+	register long a2 __asm__("a2") = n;
+	register long a6 __asm__("a6") = a;
+
+	__asm__ __volatile__ ("syscall"
+			      : "+&a"(a2)
+			      : "a"(a6)
+			      : "memory");
+	return a2;
+}
+
+static inline long __syscall2(long n, long a, long b)
+{
+	register long a2 __asm__("a2") = n;
+	register long a6 __asm__("a6") = a;
+	register long a3 __asm__("a3") = b;
+
+	__asm__ __volatile__ ("syscall"
+			      : "+&a"(a2)
+			      : "a"(a6), "a"(a3)
+			      : "memory");
+	return a2;
+}
+
+static inline long __syscall3(long n, long a, long b, long c)
+{
+	register long a2 __asm__("a2") = n;
+	register long a6 __asm__("a6") = a;
+	register long a3 __asm__("a3") = b;
+	register long a4 __asm__("a4") = c;
+
+	__asm__ __volatile__ ("syscall"
+			      : "+&a"(a2)
+			      : "a"(a6), "a"(a3), "a"(a4)
+			      : "memory");
+	return a2;
+}
+
+static inline long __syscall4(long n, long a, long b, long c, long d)
+{
+	register long a2 __asm__("a2") = n;
+	register long a6 __asm__("a6") = a;
+	register long a3 __asm__("a3") = b;
+	register long a4 __asm__("a4") = c;
+	register long a5 __asm__("a5") = d;
+
+	__asm__ __volatile__ ("syscall"
+			      : "+&a"(a2)
+			      : "a"(a6), "a"(a3), "a"(a4), "a"(a5)
+			      : "memory");
+	return a2;
+}
+
+static inline long __syscall5(long n, long a, long b, long c, long d, long e)
+{
+	register long a2 __asm__("a2") = n;
+	register long a6 __asm__("a6") = a;
+	register long a3 __asm__("a3") = b;
+	register long a4 __asm__("a4") = c;
+	register long a5 __asm__("a5") = d;
+	register long a8 __asm__("a8") = e;
+
+	__asm__ __volatile__ ("syscall"
+			      : "+&a"(a2)
+			      : "a"(a6), "a"(a3), "a"(a4), "a"(a5), "a"(a8)
+			      : "memory");
+	return a2;
+}
+
+static inline long __syscall6(long n, long a, long b, long c, long d, long e, long f)
+{
+	register long a2 __asm__("a2") = n;
+	register long a6 __asm__("a6") = a;
+	register long a3 __asm__("a3") = b;
+	register long a4 __asm__("a4") = c;
+	register long a5 __asm__("a5") = d;
+	register long a8 __asm__("a8") = e;
+	register long a9 __asm__("a9") = f;
+
+	__asm__ __volatile__ ("syscall"
+			      : "+&a"(a2)
+			      : "a"(a6), "a"(a3), "a"(a4), "a"(a5), "a"(a8), "a"(a9)
+			      : "memory");
+	return a2;
+}
diff --git a/configure b/configure
index 0955ce6..2c56cab 100755
--- a/configure
+++ b/configure
@@ -312,6 +312,7 @@ microblaze*) ARCH=microblaze ;;
 or1k*) ARCH=or1k ;;
 powerpc*) ARCH=powerpc ;;
 sh[1-9bel-]*|sh|superh*) ARCH=sh ;;
+xtensa*) ARCH=xtensa ;;
 unknown) fail "$0: unable to detect target arch; try $0 --target=..." ;;
 *) fail "$0: unknown or unsupported target \"$target\"" ;;
 esac
diff --git a/crt/xtensa/crti.s b/crt/xtensa/crti.s
new file mode 100644
index 0000000..6565656
--- /dev/null
+++ b/crt/xtensa/crti.s
@@ -0,0 +1,11 @@
+.section .init
+.global  _init
+.type    _init, @function
+_init:
+	entry	a1, 32
+
+.section .fini
+.global  _fini
+.type    _fini, @function
+_fini:
+	entry	a1, 32
diff --git a/crt/xtensa/crtn.s b/crt/xtensa/crtn.s
new file mode 100644
index 0000000..7e9a014
--- /dev/null
+++ b/crt/xtensa/crtn.s
@@ -0,0 +1,5 @@
+.section .init
+	retw
+
+.section .fini
+	retw
diff --git a/include/elf.h b/include/elf.h
index 8b3cd3e..8168cf1 100644
--- a/include/elf.h
+++ b/include/elf.h
@@ -2819,6 +2819,64 @@ typedef Elf32_Addr Elf32_Conflict;
 #define R_OR1K_TLS_DTPOFF	33
 #define R_OR1K_TLS_DTPMOD	34
 
+
+#define DT_XTENSA_GOT_LOC_OFF	(DT_LOPROC + 0)
+#define DT_XTENSA_GOT_LOC_SZ	(DT_LOPROC + 1)
+#define DT_XTENSA_NUM		2
+
+#define R_XTENSA_NONE		0
+#define R_XTENSA_32		1
+#define R_XTENSA_RTLD		2
+#define R_XTENSA_GLOB_DAT	3
+#define R_XTENSA_JMP_SLOT	4
+#define R_XTENSA_RELATIVE	5
+#define R_XTENSA_PLT		6
+#define R_XTENSA_OP0		8
+#define R_XTENSA_OP1		9
+#define R_XTENSA_OP2		10
+#define R_XTENSA_ASM_EXPAND	11
+#define R_XTENSA_ASM_SIMPLIFY	12
+#define R_XTENSA_GNU_VTINHERIT	15
+#define R_XTENSA_GNU_VTENTRY	16
+#define R_XTENSA_DIFF8		17
+#define R_XTENSA_DIFF16		18
+#define R_XTENSA_DIFF32		19
+#define R_XTENSA_SLOT0_OP	20
+#define R_XTENSA_SLOT1_OP	21
+#define R_XTENSA_SLOT2_OP	22
+#define R_XTENSA_SLOT3_OP	23
+#define R_XTENSA_SLOT4_OP	24
+#define R_XTENSA_SLOT5_OP	25
+#define R_XTENSA_SLOT6_OP	26
+#define R_XTENSA_SLOT7_OP	27
+#define R_XTENSA_SLOT8_OP	28
+#define R_XTENSA_SLOT9_OP	29
+#define R_XTENSA_SLOT10_OP	30
+#define R_XTENSA_SLOT11_OP	31
+#define R_XTENSA_SLOT12_OP	32
+#define R_XTENSA_SLOT13_OP	33
+#define R_XTENSA_SLOT14_OP	34
+#define R_XTENSA_SLOT0_ALT	35
+#define R_XTENSA_SLOT1_ALT	36
+#define R_XTENSA_SLOT2_ALT	37
+#define R_XTENSA_SLOT3_ALT	38
+#define R_XTENSA_SLOT4_ALT	39
+#define R_XTENSA_SLOT5_ALT	40
+#define R_XTENSA_SLOT6_ALT	41
+#define R_XTENSA_SLOT7_ALT	42
+#define R_XTENSA_SLOT8_ALT	43
+#define R_XTENSA_SLOT9_ALT	44
+#define R_XTENSA_SLOT10_ALT	45
+#define R_XTENSA_SLOT11_ALT	46
+#define R_XTENSA_SLOT12_ALT	47
+#define R_XTENSA_SLOT13_ALT	48
+#define R_XTENSA_SLOT14_ALT	49
+#define R_XTENSA_TLSDESC_FN	50
+#define R_XTENSA_TLSDESC_ARG	51
+#define R_XTENSA_TLS_TPOFF	53
+
+#define R_XTENSA_NUM		54
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/ldso/dlstart.c b/ldso/dlstart.c
index 4dbe178..0249937 100644
--- a/ldso/dlstart.c
+++ b/ldso/dlstart.c
@@ -22,6 +22,7 @@ void _dlstart_c(size_t *sp, size_t *dynv)
 {
 	size_t i, aux[AUX_CNT], dyn[DYN_CNT];
 	size_t *rel, rel_size, base;
+	unsigned long addr = 1;
 
 	int argc = *sp;
 	char **argv = (void *)(sp+1);
@@ -138,7 +139,17 @@ void _dlstart_c(size_t *sp, size_t *dynv)
 	for (; rel_size; rel+=3, rel_size-=3*sizeof(size_t)) {
 		if (!IS_RELATIVE(rel[1], 0)) continue;
 		size_t *rel_addr = (void *)(base + rel[0]);
-		*rel_addr = base + rel[2];
+		if (((unsigned long)rel_addr & -4096) != addr) {
+			addr = (unsigned long)rel_addr & -4096;
+			__asm__ __volatile__ ("movi a2, 82\n\t"
+					      "mov a6, %0\n\t"
+					      "mov a3, %1\n\t"
+					      "mov a4, %2\n\t"
+					      "syscall"
+					      :: "a"(addr), "a"(4096), "a"(7)
+					      : "a2", "a3", "a4", "a6", "memory");
+		}
+		*rel_addr += base + rel[2];
 	}
 #endif
 
diff --git a/ldso/dynlink.c b/ldso/dynlink.c
index 87f3b7f..1927097 100644
--- a/ldso/dynlink.c
+++ b/ldso/dynlink.c
@@ -314,6 +314,7 @@ static void do_relocs(struct dso *dso, size_t *rel, size_t rel_size, size_t stri
 	size_t tls_val;
 	size_t addend;
 	int skip_relative = 0, reuse_addends = 0, save_slot = 0;
+	unsigned long addr = 1;
 
 	if (dso == &ldso) {
 		/* Only ldso's REL table needs addend saving/reuse. */
@@ -328,6 +329,10 @@ static void do_relocs(struct dso *dso, size_t *rel, size_t rel_size, size_t stri
 		if (type == REL_NONE) continue;
 		sym_index = R_SYM(rel[1]);
 		reloc_addr = laddr(dso, rel[0]);
+		if (((unsigned long)reloc_addr & -4096) != addr) {
+			addr = (unsigned long)reloc_addr & -4096;
+			mprotect((void *)addr, 4096, 7);
+		}
 		if (sym_index) {
 			sym = syms + sym_index;
 			name = strings + sym->st_name;
@@ -377,7 +382,7 @@ static void do_relocs(struct dso *dso, size_t *rel, size_t rel_size, size_t stri
 			*reloc_addr = sym_val + addend;
 			break;
 		case REL_RELATIVE:
-			*reloc_addr = (size_t)base + addend;
+			*reloc_addr += (size_t)base + addend;
 			break;
 		case REL_SYM_OR_REL:
 			if (sym) *reloc_addr = sym_val + addend;
@@ -444,6 +449,40 @@ static void do_relocs(struct dso *dso, size_t *rel, size_t rel_size, size_t stri
 #endif
 			}
 			break;
+		case R_XTENSA_RTLD:
+			break;
+		case R_XTENSA_TLSDESC_FN:
+			if (runtime && def.dso->tls_id >= static_tls_cnt) {
+				reloc_addr[0] = (size_t)__tlsdesc_dynamic;
+			} else {
+				reloc_addr[0] = (size_t)__tlsdesc_static;
+			}
+			break;
+		case R_XTENSA_TLSDESC_ARG:
+			if (stride<3) addend = reloc_addr[1];
+			if (runtime && def.dso->tls_id >= static_tls_cnt) {
+				struct td_index *new = malloc(sizeof *new);
+				if (!new) {
+					error(
+					"Error relocating %s: cannot allocate TLSDESC for %s",
+					dso->name, sym ? name : "(local)" );
+					longjmp(*rtld_fail, 1);
+				}
+				new->next = dso->td_index;
+				dso->td_index = new;
+				new->args[0] = def.dso->tls_id;
+				new->args[1] = tls_val + addend;
+				reloc_addr[0] = (size_t)new;
+			} else {
+#ifdef TLS_ABOVE_TP
+				reloc_addr[0] = tls_val + def.dso->tls.offset
+					+ TPOFF_K + addend;
+#else
+				reloc_addr[0] = tls_val - def.dso->tls.offset
+					+ addend;
+#endif
+			}
+			break;
 		default:
 			error("Error relocating %s: unsupported relocation type %d",
 				dso->name, type);
diff --git a/src/internal/xtensa/syscall.s b/src/internal/xtensa/syscall.s
new file mode 100644
index 0000000..6dc584b
--- /dev/null
+++ b/src/internal/xtensa/syscall.s
@@ -0,0 +1,15 @@
+.global __syscall
+.hidden __syscall
+.type   __syscall,@function
+.align 4
+__syscall:
+	entry	a1, 16
+	mov	a8, a3
+	mov	a3, a4
+	mov	a4, a5
+	mov	a5, a6
+	mov	a6, a8
+	mov	a8, a7
+	l32i	a9, a1, 16
+	syscall
+	retw
diff --git a/src/ldso/xtensa/tlsdesc.s b/src/ldso/xtensa/tlsdesc.s
new file mode 100644
index 0000000..5fa846d
--- /dev/null
+++ b/src/ldso/xtensa/tlsdesc.s
@@ -0,0 +1,22 @@
+.global __tlsdesc_static
+.hidden __tlsdesc_static
+.type __tlsdesc_static,@function
+.align 4
+__tlsdesc_static:
+	entry	a1, 16
+	rur	a3, threadptr
+	add	a2, a2, a3
+	retw
+
+.hidden __tls_get_new
+
+.global __tlsdesc_dynamic
+.hidden __tlsdesc_dynamic
+.type __tlsdesc_dynamic,@function
+.align 4
+__tlsdesc_dynamic:
+	entry	a1, 16
+	mov	a6, a2
+	call4	__tls_get_addr
+	mov	a2, a6
+	retw
diff --git a/src/setjmp/xtensa/longjmp.s b/src/setjmp/xtensa/longjmp.s
new file mode 100644
index 0000000..0b49188
--- /dev/null
+++ b/src/setjmp/xtensa/longjmp.s
@@ -0,0 +1,73 @@
+.global _longjmp
+.global longjmp
+.type _longjmp,%function
+.type longjmp,%function
+.align 4
+_longjmp:
+longjmp:
+	entry	a1, 16
+
+	/* Invalidate all but the current register window. */
+	call4	__window_spill
+
+	l32i	a0, a2, 64
+	addi	a7, a1, -16
+	l32i	a4, a2, 0
+	l32i	a5, a2, 4
+	s32i	a4, a7, 0
+	s32i	a5, a7, 4
+	l32i	a4, a2, 8
+	l32i	a5, a2, 12
+	s32i	a4, a7, 8
+	s32i	a5, a7, 12
+
+	/* Copy the remaining 0-8 saved registers. */
+	extui	a7, a0, 30, 2
+	blti	a7, 2, 2f
+	l32i	a8, a2, 52	/* a8: SP of 'caller-1' */
+	slli	a4, a7, 4
+	sub	a6, a8, a4
+	addi	a5, a2, 16
+	addi	a8, a8, -16	/* a8: end of overflow area */
+1:
+	l32i	a7, a5, 0
+	l32i	a4, a5, 4
+	s32i	a7, a6, 0
+	s32i	a4, a6, 4
+	l32i	a7, a5, 8
+	l32i	a4, a5, 12
+	s32i	a7, a6, 8
+	s32i	a4, a6, 12
+	addi	a5, a5, 16
+	addi	a6, a6, 16
+	bltu	a6, a8, 1b
+2:
+	/* The 4 words saved from the register save area at the target's
+	 * sp are copied back to the target procedure's save area. The
+	 * only point of this is to prevent a catastrophic failure in
+	 * case the contents were moved by an alloca after calling
+	 * setjmp. This is a bit paranoid but it doesn't cost much.
+	 */
+
+	l32i	a7, a2, 4		/* load the target stack pointer */
+	addi	a7, a7, -16		/* find the destination save area */
+	l32i	a4, a2, 48
+	l32i	a5, a2, 52
+	s32i	a4, a7, 0
+	s32i	a5, a7, 4
+	l32i	a4, a2, 56
+	l32i	a5, a2, 60
+	s32i	a4, a7, 8
+	s32i	a5, a7, 12
+
+	l32i	a4, a2, 68
+	beqz	a4, 1f
+
+	mov	a6, a2
+	movi	a7, 1
+.hidden __sigsetjmp_tail
+	call4	__sigsetjmp_tail
+1:
+	movi	a2, 1
+	movnez	a2, a3, a3
+	retw
diff --git a/src/setjmp/xtensa/setjmp.s b/src/setjmp/xtensa/setjmp.s
new file mode 100644
index 0000000..1366af0
--- /dev/null
+++ b/src/setjmp/xtensa/setjmp.s
@@ -0,0 +1,13 @@
+.global __setjmp
+.global _setjmp
+.global setjmp
+.type __setjmp,@function
+.type _setjmp,@function
+.type setjmp,@function
+.align 4
+__setjmp:
+_setjmp:
+setjmp:
+	entry	a1, 16
+	movi	a3, 0
+	j	___sigsetjmp
diff --git a/src/signal/xtensa/restore.s b/src/signal/xtensa/restore.s
new file mode 100644
index 0000000..a0c5229
--- /dev/null
+++ b/src/signal/xtensa/restore.s
@@ -0,0 +1,10 @@
+.global __restore
+.global __restore_rt
+.type __restore,%function
+.type __restore_rt,%function
+.space 1
+.align 4
+__restore:
+__restore_rt:
+	movi	a2, 225 # SYS_rt_sigreturn
+	syscall
diff --git a/src/signal/xtensa/sigsetjmp.s b/src/signal/xtensa/sigsetjmp.s
new file mode 100644
index 0000000..825e182
--- /dev/null
+++ b/src/signal/xtensa/sigsetjmp.s
@@ -0,0 +1,69 @@
+.global sigsetjmp
+.global __sigsetjmp
+.global ___sigsetjmp
+.type sigsetjmp,%function
+.type __sigsetjmp,%function
+.type ___sigsetjmp,%function
+.align 4
+sigsetjmp:
+__sigsetjmp:
+	entry	a1, 16
+
+___sigsetjmp:
+	call4	__window_spill
+
+	/* Copy the caller registers a0 - a3 at (sp - 16) to jmpbuf. */
+	addi	a7, a1, -16
+	l32i	a4, a7, 0
+	l32i	a5, a7, 4
+	s32i	a4, a2, 0
+	s32i	a5, a2, 4
+	l32i	a4, a7, 8
+	l32i	a5, a7, 12
+	s32i	a4, a2, 8
+	s32i	a5, a2, 12
+
+	/* Copy the caller registers a4-a8/a12 from the overflow area. */
+	/* Entry moved the SP by 16 bytes, so SP of caller-1 is at (sp + 4). */
+	extui	a7, a0, 30, 2
+	blti	a7, 2, 2f
+	l32i	a8, a1, 4	/* a8: SP of 'caller-1' */
+	slli	a4, a7, 4
+	sub	a6, a8, a4
+	addi	a5, a2, 16
+	addi	a8, a8, -16	/* a8: end of overflow area */
+1:
+	l32i	a7, a6, 0
+	l32i	a4, a6, 4
+	s32i	a7, a5, 0
+	s32i	a4, a5, 4
+	l32i	a7, a6, 8
+	l32i	a4, a6, 12
+	s32i	a7, a5, 8
+	s32i	a4, a5, 12
+	addi	a5, a5, 16
+	addi	a6, a6, 16
+	bltu	a6, a8, 1b
+2:
+	/* Copy caller-1 registers a0 - a3 (this is assuming entry a1, 16) */
+	l32i	a4, a1, 0
+	l32i	a5, a1, 4
+	s32i	a4, a2, 48
+	s32i	a5, a2, 52
+	l32i	a4, a1, 8
+	l32i	a5, a1, 12
+	s32i	a4, a2, 56
+	s32i	a5, a2, 60
+
+	/* Save the return address, including the window size bits. */
+	s32i	a0, a2, 64
+	s32i	a3, a2, 68
+	beqz	a3, 1f
+
+	mov	a6, a2
+	movi	a7, 0
+.hidden __sigsetjmp_tail
+	call4	__sigsetjmp_tail
+1:
+	movi	a2, 0
+	retw
diff --git a/src/signal/xtensa/windowspill.s b/src/signal/xtensa/windowspill.s
new file mode 100644
index 0000000..7ab7f3d
--- /dev/null
+++ b/src/signal/xtensa/windowspill.s
@@ -0,0 +1,78 @@
+#include <bits/xtensa-config.h>
+
+#ifdef __XTENSA_WINDOWED_ABI__
+.global __window_spill
+.type   __window_spill, @function
+.align  4
+__window_spill:
+	entry	a1, 48
+	bbci.l	a0, 31, .L4		/* branch if called with call4 */
+	bbsi.l	a0, 30, .L12		/* branch if called with call12 */
+
+	/* Called with call8: touch register NUM_REGS-12 (4/20/52) */
+.L8:
+#if XCHAL_NUM_AREGS > 16
+	call12	1f
+	retw
+
+	.align	4
+1:	_entry	a1, 48			/* touch NUM_REGS-24 (x/8/40) */
+
+#if XCHAL_NUM_AREGS == 32
+	mov	a8, a0
+	retw
+#else
+	mov	a12, a0
+	_entry	a1, 48			/* touch NUM_REGS-36 (x/x/28) */
+	mov	a12, a0
+	_entry	a1, 48			/* touch NUM_REGS-48 (x/x/16) */
+	mov	a12, a0
+	_entry	a1, 16			/* touch NUM_REGS-60 (x/x/4) */
+#endif
+#endif
+	mov	a4, a0
+	retw
+
+	/* Called with call4: touch register NUM_REGS-8 (8/24/56) */
+.L4:
+#if XCHAL_NUM_AREGS == 16
+	mov	a8, a0
+#else
+	call12	1f
+	retw
+
+	.align	4
+1:	_entry	a1, 48			/* touch NUM_REGS-20 (x/12/44) */
+	mov	a12, a0
+#if XCHAL_NUM_AREGS > 32
+	_entry	a1, 48			/* touch NUM_REGS-32 (x/x/32) */
+	mov	a12, a0
+	_entry	a1, 48			/* touch NUM_REGS-44 (x/x/20) */
+	mov	a12, a0
+	_entry	a1, 48			/* touch NUM_REGS-56 (x/x/8) */
+	mov	a8, a0
+#endif
+#endif
+	retw
+
+	/* Called with call12: touch register NUM_REGS-16 (x/16/48) */
+.L12:
+#if XCHAL_NUM_AREGS > 16
+	call12	1f
+	retw
+
+	.align	4
+1:	_entry	a1, 48			/* touch NUM_REGS-28 (x/4/36) */
+#if XCHAL_NUM_AREGS == 32
+	mov	a4, a0
+#else
+	mov	a12, a0
+	_entry	a1, 48			/* touch NUM_REGS-40 (x/x/24) */
+	mov	a12, a0
+	_entry	a1, 48			/* touch NUM_REGS-52 (x/x/12) */
+	mov	a12, a0
+#endif
+#endif
+	retw
+
+#endif
diff --git a/src/thread/xtensa/__set_thread_area.s b/src/thread/xtensa/__set_thread_area.s
new file mode 100644
index 0000000..4fe97ac
--- /dev/null
+++ b/src/thread/xtensa/__set_thread_area.s
@@ -0,0 +1,8 @@
+.global __set_thread_area
+.type   __set_thread_area,@function
+.align 4
+__set_thread_area:
+	entry	a1, 16
+	wur	a2, threadptr
+	movi	a2, 0
+	retw
diff --git a/src/thread/xtensa/__unmapself.s b/src/thread/xtensa/__unmapself.s
new file mode 100644
index 0000000..c5d8f54
--- /dev/null
+++ b/src/thread/xtensa/__unmapself.s
@@ -0,0 +1,10 @@
+.global __unmapself
+.type   __unmapself,%function
+.align 4
+__unmapself:
+	entry	a1, 16
+	mov	a6, a2
+	movi	a2, 81 # SYS_munmap
+	syscall
+	movi	a2, 118 # SYS_exit
+	syscall
diff --git a/src/thread/xtensa/clone.s b/src/thread/xtensa/clone.s
new file mode 100644
index 0000000..c75db81
--- /dev/null
+++ b/src/thread/xtensa/clone.s
@@ -0,0 +1,39 @@
+// __clone(func, stack, flags, arg, ptid, tls, ctid)
+//         a2,   a3,    a4,    a5,  a6,   a7,  [sp]
+
+// syscall(SYS_clone, flags, stack, ptid, tls, ctid)
+//         a2,        a6,    a3,    a4,   a5,  a8
+
+.global __clone
+.type   __clone,%function
+.align 4
+__clone:
+	entry	a1, 16
+	// align stack and save func,arg
+	srli	a3, a3, 4
+	slli	a3, a3, 4
+	addi	a3, a3, -16
+	s32i	a2, a3, 0
+	s32i	a5, a3, 4
+
+	// syscall
+	mov	a2, a4
+	mov	a4, a6
+	mov	a6, a2
+	mov	a5, a7
+	l32i	a8, a1, 16
+	movi	a2, 116 # SYS_clone
+	syscall
+
+	beqz	a2, 1f
+	// parent
+	retw
+
+	// child
+1:
+	movi	a0, 0
+	l32i	a4, a1, 0
+	l32i	a6, a1, 4
+	callx4	a4
+	movi	a2, 118 # SYS_exit
+	syscall
diff --git a/src/thread/xtensa/syscall_cp.s b/src/thread/xtensa/syscall_cp.s
new file mode 100644
index 0000000..f68df8d
--- /dev/null
+++ b/src/thread/xtensa/syscall_cp.s
@@ -0,0 +1,37 @@
+// __syscall_cp_asm(&self->cancel, nr, u, v, w, x, y, z)
+//                  a2             a3  a4 a5 a6 a7 [sp] [sp+4]
+
+// syscall(nr, u, v, w, x, y, z)
+//         a2  a6 a3 a4 a5 a8 a9
+
+.global __cp_begin
+.hidden __cp_begin
+.global __cp_end
+.hidden __cp_end
+.global __cp_cancel
+.hidden __cp_cancel
+.hidden __cancel
+.global __syscall_cp_asm
+.hidden __syscall_cp_asm
+.type __syscall_cp_asm,%function
+.align 4
+__syscall_cp_asm:
+	entry	a1, 16
+__cp_begin:
+	l32i	a2, a2, 0
+	bnez	a2, __cp_cancel
+	mov	a2, a4
+	mov	a4, a6
+	mov	a6, a2
+	mov	a2, a3
+	mov	a3, a5
+	mov	a5, a7
+	l32i	a8, a1, 16
+	l32i	a9, a1, 20
+	syscall
+__cp_end:
+	retw
+__cp_cancel:
+	call4	__cancel
+	mov	a2, a6
+	retw
-- 
2.1.4