add experimental musl xtensa support

target/config/Config.in.libc

@@ -50,7 +50,8 @@ config ADK_TARGET_LIB_MUSL
 		ADK_TARGET_ARCH_PPC64 || \
 		ADK_TARGET_ARCH_SH || \
 		ADK_TARGET_ARCH_X86 || \
-		ADK_TARGET_ARCH_X86_64) && ADK_TARGET_OS_LINUX
+		ADK_TARGET_ARCH_X86_64 || \
+		ADK_TARGET_ARCH_XTENSA) && ADK_TARGET_OS_LINUX
 	help
  	  http://musl-libc.org
 

toolchain/gcc/patches/6.1.0/xtensa-musl.patch

@@ -0,0 +1,27 @@
+From 8f018dd26d3d9992fc32f6ce04492572312d2790 Mon Sep 17 00:00:00 2001
+From: Max Filippov <jcmvbkbc@gmail.com>
+Date: Tue, 22 Mar 2016 16:07:24 +0300
+Subject: [PATCH] xtensa: support musl
+
+Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
+---
+ gcc/config/xtensa/linux.h | 3 +++
+ 1 file changed, 3 insertions(+)
+
+diff --git a/gcc/config/xtensa/linux.h b/gcc/config/xtensa/linux.h
+index 6ecb153..a41ef96 100644
+--- a/gcc/config/xtensa/linux.h
++++ b/gcc/config/xtensa/linux.h
+@@ -48,6 +48,9 @@ along with GCC; see the file COPYING3.  If not see
+ 
+ #define GLIBC_DYNAMIC_LINKER "/lib/ld.so.1"
+ 
++#undef MUSL_DYNAMIC_LINKER
++#define MUSL_DYNAMIC_LINKER "/lib/ld-musl-xtensa.so.1"
++
+ #undef LINK_SPEC
+ #define LINK_SPEC \
+  "%{shared:-shared} \
+-- 
+2.1.4
+

toolchain/musl/patches/1.1.14/xtensa.patch

@@ -0,0 +1,2429 @@
+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
+