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-rw-r--r--include/elf.h5
-rw-r--r--include/link.h2
-rw-r--r--ldso/include/dl-hash.h2
-rw-r--r--ldso/include/inline-hashtab.h265
-rw-r--r--ldso/include/ldsodefs.h7
-rw-r--r--ldso/include/tlsdeschtab.h119
-rw-r--r--ldso/ldso/dl-tls.c29
-rw-r--r--ldso/ldso/fdpic/dl-inlines.h270
-rw-r--r--ldso/ldso/xtensa/dl-debug.h77
-rw-r--r--ldso/ldso/xtensa/dl-startup.h2
-rw-r--r--ldso/ldso/xtensa/dl-sysdep.h9
-rw-r--r--ldso/ldso/xtensa/dl-tlsdesc.S96
-rw-r--r--ldso/ldso/xtensa/elfinterp.c51
-rw-r--r--libc/sysdeps/linux/xtensa/Makefile.arch5
-rw-r--r--libc/sysdeps/linux/xtensa/clone.S101
-rw-r--r--libc/sysdeps/linux/xtensa/fork.c8
-rw-r--r--libc/sysdeps/linux/xtensa/jmpbuf-unwind.h38
-rw-r--r--libc/sysdeps/linux/xtensa/sys/ptrace.h155
-rw-r--r--libc/sysdeps/linux/xtensa/sysdep.h39
-rw-r--r--libc/sysdeps/linux/xtensa/vfork.S104
-rw-r--r--libpthread/nptl/sysdeps/unix/sysv/linux/lowlevellock.c2
-rw-r--r--libpthread/nptl/sysdeps/unix/sysv/linux/xtensa/Makefile.arch15
-rw-r--r--libpthread/nptl/sysdeps/unix/sysv/linux/xtensa/bits/pthreadtypes.h184
-rw-r--r--libpthread/nptl/sysdeps/unix/sysv/linux/xtensa/bits/semaphore.h35
-rw-r--r--libpthread/nptl/sysdeps/unix/sysv/linux/xtensa/clone.S3
-rw-r--r--libpthread/nptl/sysdeps/unix/sysv/linux/xtensa/createthread.c24
-rw-r--r--libpthread/nptl/sysdeps/unix/sysv/linux/xtensa/fork.c29
-rw-r--r--libpthread/nptl/sysdeps/unix/sysv/linux/xtensa/lowlevellock.c132
-rw-r--r--libpthread/nptl/sysdeps/unix/sysv/linux/xtensa/lowlevellock.h293
-rw-r--r--libpthread/nptl/sysdeps/unix/sysv/linux/xtensa/pt-initfini.c134
-rw-r--r--libpthread/nptl/sysdeps/unix/sysv/linux/xtensa/pthread_once.c89
-rw-r--r--libpthread/nptl/sysdeps/unix/sysv/linux/xtensa/sysdep-cancel.h108
-rw-r--r--libpthread/nptl/sysdeps/unix/sysv/linux/xtensa/vfork.S59
-rw-r--r--libpthread/nptl/sysdeps/xtensa/Makefile.arch40
-rw-r--r--libpthread/nptl/sysdeps/xtensa/dl-tls.h58
-rw-r--r--libpthread/nptl/sysdeps/xtensa/jmpbuf-unwind.h32
-rw-r--r--libpthread/nptl/sysdeps/xtensa/libc-tls.c36
-rw-r--r--libpthread/nptl/sysdeps/xtensa/pthread_spin_lock.S37
-rw-r--r--libpthread/nptl/sysdeps/xtensa/pthread_spin_trylock.S40
-rw-r--r--libpthread/nptl/sysdeps/xtensa/pthreaddef.h39
-rw-r--r--libpthread/nptl/sysdeps/xtensa/tcb-offsets.sym7
-rw-r--r--libpthread/nptl/sysdeps/xtensa/tls.h159
-rw-r--r--libpthread/nptl/sysdeps/xtensa/tlsdesc.sym10
43 files changed, 2479 insertions, 470 deletions
diff --git a/include/elf.h b/include/elf.h
index 1979209cd..fc6086489 100644
--- a/include/elf.h
+++ b/include/elf.h
@@ -3072,8 +3072,11 @@ typedef Elf32_Addr Elf32_Conflict;
#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
/* Keep this the last entry. */
-#define R_XTENSA_NUM 50
+#define R_XTENSA_NUM 54
/* C6X specific relocs */
#define R_C6000_NONE 0
diff --git a/include/link.h b/include/link.h
index 147b79384..67bc80062 100644
--- a/include/link.h
+++ b/include/link.h
@@ -132,6 +132,8 @@ struct link_map
size_t l_tls_modid;
/* Nonzero if _dl_init_static_tls should be called for this module */
unsigned int l_need_tls_init:1;
+ /* Address of TLS descriptor hash table. */
+ void *l_tlsdesc_table;
#endif
#endif
};
diff --git a/ldso/include/dl-hash.h b/ldso/include/dl-hash.h
index e1e3e3f95..18f21aefa 100644
--- a/ldso/include/dl-hash.h
+++ b/ldso/include/dl-hash.h
@@ -70,6 +70,8 @@ struct elf_resolve {
size_t l_tls_modid;
/* Nonzero if _dl_init_static_tls should be called for this module */
unsigned int l_need_tls_init:1;
+ /* Address of TLS descriptor hash table. */
+ void *l_tlsdesc_table;
#endif
ElfW(Addr) mapaddr;
diff --git a/ldso/include/inline-hashtab.h b/ldso/include/inline-hashtab.h
new file mode 100644
index 000000000..4a4812027
--- /dev/null
+++ b/ldso/include/inline-hashtab.h
@@ -0,0 +1,265 @@
+/*
+ * The hashcode handling code below is heavily inspired in libiberty's
+ * hashtab code, but with most adaptation points and support for
+ * deleting elements removed.
+ *
+ * Copyright (C) 1999, 2000, 2001, 2002, 2003 Free Software Foundation, Inc.
+ * Contributed by Vladimir Makarov (vmakarov@cygnus.com).
+ */
+
+#ifndef INLINE_HASHTAB_H
+# define INLINE_HASHTAB_H 1
+
+static __always_inline unsigned long
+higher_prime_number(unsigned long n)
+{
+ /* These are primes that are near, but slightly smaller than, a power of two. */
+ static const unsigned long primes[] = {
+ 7,
+ 13,
+ 31,
+ 61,
+ 127,
+ 251,
+ 509,
+ 1021,
+ 2039,
+ 4093,
+ 8191,
+ 16381,
+ 32749,
+ 65521,
+ 131071,
+ 262139,
+ 524287,
+ 1048573,
+ 2097143,
+ 4194301,
+ 8388593,
+ 16777213,
+ 33554393,
+ 67108859,
+ 134217689,
+ 268435399,
+ 536870909,
+ 1073741789,
+ /* 4294967291 */
+ ((unsigned long) 2147483647) + ((unsigned long) 2147483644),
+ };
+ const unsigned long *low = &primes[0];
+ const unsigned long *high = &primes[ARRAY_SIZE(primes)];
+
+ while (low != high) {
+ const unsigned long *mid = low + (high - low) / 2;
+ if (n > *mid)
+ low = mid + 1;
+ else
+ high = mid;
+ }
+
+#if 0
+ /* If we've run out of primes, abort. */
+ if (n > *low) {
+ fprintf(stderr, "Cannot find prime bigger than %lu\n", n);
+ abort();
+ }
+#endif
+
+ return *low;
+}
+
+struct funcdesc_ht
+{
+ /* Table itself */
+ void **entries;
+
+ /* Current size (in entries) of the hash table */
+ size_t size;
+
+ /* Current number of elements */
+ size_t n_elements;
+};
+
+static __always_inline struct funcdesc_ht *
+htab_create(void)
+{
+ struct funcdesc_ht *ht = _dl_malloc(sizeof(*ht));
+ size_t ent_size;
+
+ if (!ht)
+ return NULL;
+ ht->size = 3;
+ ent_size = sizeof(void *) * ht->size;
+ ht->entries = _dl_malloc(ent_size);
+ if (!ht->entries)
+ return NULL;
+
+ ht->n_elements = 0;
+ _dl_memset(ht->entries, 0, ent_size);
+
+ return ht;
+}
+
+/*
+ * This is only called from _dl_loadaddr_unmap, so it's safe to call
+ * _dl_free(). See the discussion below.
+ */
+static __always_inline void
+htab_delete(struct funcdesc_ht *htab)
+{
+ size_t i;
+
+ for (i = htab->size - 1; i >= 0; i--)
+ if (htab->entries[i])
+ _dl_free(htab->entries[i]);
+
+ _dl_free(htab->entries);
+ _dl_free(htab);
+}
+
+/*
+ * Similar to htab_find_slot, but without several unwanted side effects:
+ * - Does not call htab->eq_f when it finds an existing entry.
+ * - Does not change the count of elements/searches/collisions in the
+ * hash table.
+ * This function also assumes there are no deleted entries in the table.
+ * HASH is the hash value for the element to be inserted.
+ */
+static __always_inline void **
+find_empty_slot_for_expand(struct funcdesc_ht *htab, int hash)
+{
+ size_t size = htab->size;
+ unsigned int index = hash % size;
+ void **slot = htab->entries + index;
+ int hash2;
+
+ if (!*slot)
+ return slot;
+
+ hash2 = 1 + hash % (size - 2);
+ for (;;) {
+ index += hash2;
+ if (index >= size)
+ index -= size;
+
+ slot = htab->entries + index;
+ if (!*slot)
+ return slot;
+ }
+}
+
+/*
+ * The following function changes size of memory allocated for the
+ * entries and repeatedly inserts the table elements. The occupancy
+ * of the table after the call will be about 50%. Naturally the hash
+ * table must already exist. Remember also that the place of the
+ * table entries is changed. If memory allocation failures are allowed,
+ * this function will return zero, indicating that the table could not be
+ * expanded. If all goes well, it will return a non-zero value.
+ */
+static __always_inline int
+htab_expand(struct funcdesc_ht *htab, int (*hash_fn) (void *))
+{
+ void **oentries;
+ void **olimit;
+ void **p;
+ void **nentries;
+ size_t nsize;
+
+ oentries = htab->entries;
+ olimit = oentries + htab->size;
+
+ /*
+ * Resize only when table after removal of unused elements is either
+ * too full or too empty.
+ */
+ if (htab->n_elements * 2 > htab->size)
+ nsize = higher_prime_number(htab->n_elements * 2);
+ else
+ nsize = htab->size;
+
+ nentries = _dl_malloc(sizeof(*nentries) * nsize);
+ _dl_memset(nentries, 0, sizeof(*nentries) * nsize);
+ if (nentries == NULL)
+ return 0;
+ htab->entries = nentries;
+ htab->size = nsize;
+
+ p = oentries;
+ do {
+ if (*p)
+ *find_empty_slot_for_expand(htab, hash_fn(*p)) = *p;
+ p++;
+ } while (p < olimit);
+
+#if 0
+ /*
+ * We can't tell whether this was allocated by the _dl_malloc()
+ * built into ld.so or malloc() in the main executable or libc,
+ * and calling free() for something that wasn't malloc()ed could
+ * do Very Bad Things (TM). Take the conservative approach
+ * here, potentially wasting as much memory as actually used by
+ * the hash table, even if multiple growths occur. That's not
+ * so bad as to require some overengineered solution that would
+ * enable us to keep track of how it was allocated.
+ */
+ _dl_free(oentries);
+#endif
+ return 1;
+}
+
+/*
+ * This function searches for a hash table slot containing an entry
+ * equal to the given element. To delete an entry, call this with
+ * INSERT = 0, then call htab_clear_slot on the slot returned (possibly
+ * after doing some checks). To insert an entry, call this with
+ * INSERT = 1, then write the value you want into the returned slot.
+ * When inserting an entry, NULL may be returned if memory allocation
+ * fails.
+ */
+static __always_inline void **
+htab_find_slot(struct funcdesc_ht *htab, void *ptr, int insert,
+ int (*hash_fn)(void *), int (*eq_fn)(void *, void *))
+{
+ unsigned int index;
+ int hash, hash2;
+ size_t size;
+ void **entry;
+
+ if (htab->size * 3 <= htab->n_elements * 4 &&
+ htab_expand(htab, hash_fn) == 0)
+ return NULL;
+
+ hash = hash_fn(ptr);
+
+ size = htab->size;
+ index = hash % size;
+
+ entry = &htab->entries[index];
+ if (!*entry)
+ goto empty_entry;
+ else if (eq_fn(*entry, ptr))
+ return entry;
+
+ hash2 = 1 + hash % (size - 2);
+ for (;;) {
+ index += hash2;
+ if (index >= size)
+ index -= size;
+
+ entry = &htab->entries[index];
+ if (!*entry)
+ goto empty_entry;
+ else if (eq_fn(*entry, ptr))
+ return entry;
+ }
+
+ empty_entry:
+ if (!insert)
+ return NULL;
+
+ htab->n_elements++;
+ return entry;
+}
+
+#endif
diff --git a/ldso/include/ldsodefs.h b/ldso/include/ldsodefs.h
index 4063d00f4..f17ac0ca0 100644
--- a/ldso/include/ldsodefs.h
+++ b/ldso/include/ldsodefs.h
@@ -62,13 +62,18 @@ extern void _dl_get_tls_static_info (size_t *sizep, size_t *alignp)
extern void _dl_allocate_static_tls (struct link_map *map)
internal_function attribute_hidden;
+extern int _dl_try_allocate_static_tls (struct link_map* map)
+ internal_function attribute_hidden;
/* Taken from glibc/elf/dl-reloc.c */
#define CHECK_STATIC_TLS(sym_map) \
do { \
- if (unlikely((sym_map)->l_tls_offset == NO_TLS_OFFSET)) \
+ if (__builtin_expect ((sym_map)->l_tls_offset == NO_TLS_OFFSET, 0)) \
_dl_allocate_static_tls (sym_map); \
} while (0)
+#define TRY_STATIC_TLS(sym_map) \
+ (__builtin_expect ((sym_map)->l_tls_offset != NO_TLS_OFFSET, 1) \
+ || _dl_try_allocate_static_tls (sym_map) == 0)
/* These are internal entry points to the two halves of _dl_allocate_tls,
only used within rtld.c itself at startup time. */
diff --git a/ldso/include/tlsdeschtab.h b/ldso/include/tlsdeschtab.h
new file mode 100644
index 000000000..86baea148
--- /dev/null
+++ b/ldso/include/tlsdeschtab.h
@@ -0,0 +1,119 @@
+/* Hash table for TLS descriptors.
+ Copyright (C) 2005-2013 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by Alexandre Oliva <aoliva@redhat.com>
+
+ uClibc port by Baruch Siach <baruch@tkos.co.il>
+
+ 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 TLSDESCHTAB_H
+# define TLSDESCHTAB_H 1
+
+# ifdef SHARED
+
+# include <inline-hashtab.h>
+
+inline static int
+hash_tlsdesc (void *p)
+{
+ struct tlsdesc_dynamic_arg *td = p;
+
+ /* We know all entries are for the same module, so ti_offset is the
+ only distinguishing entry. */
+ return td->tlsinfo.ti_offset;
+}
+
+inline static int
+eq_tlsdesc (void *p, void *q)
+{
+ struct tlsdesc_dynamic_arg *tdp = p, *tdq = q;
+
+ return tdp->tlsinfo.ti_offset == tdq->tlsinfo.ti_offset;
+}
+
+inline static int
+map_generation (struct link_map *map)
+{
+ size_t idx = map->l_tls_modid;
+ struct dtv_slotinfo_list *listp = GL(dl_tls_dtv_slotinfo_list);
+
+ /* Find the place in the dtv slotinfo list. */
+ do
+ {
+ /* Does it fit in the array of this list element? */
+ if (idx < listp->len)
+ {
+ /* We should never get here for a module in static TLS, so
+ we can assume that, if the generation count is zero, we
+ still haven't determined the generation count for this
+ module. */
+ if (listp->slotinfo[idx].gen)
+ return listp->slotinfo[idx].gen;
+ else
+ break;
+ }
+ idx -= listp->len;
+ listp = listp->next;
+ }
+ while (listp != NULL);
+
+ /* If we get to this point, the module still hasn't been assigned an
+ entry in the dtv slotinfo data structures, and it will when we're
+ done with relocations. At that point, the module will get a
+ generation number that is one past the current generation, so
+ return exactly that. */
+ return GL(dl_tls_generation) + 1;
+}
+
+void *
+internal_function
+_dl_make_tlsdesc_dynamic (struct link_map *map, size_t ti_offset)
+{
+ struct funcdesc_ht *ht;
+ void **entry;
+ struct tlsdesc_dynamic_arg *td, test;
+
+ ht = map->l_tlsdesc_table;
+ if (! ht)
+ {
+ ht = htab_create ();
+ if (! ht)
+ return 0;
+ map->l_tlsdesc_table = ht;
+ }
+
+ test.tlsinfo.ti_module = map->l_tls_modid;
+ test.tlsinfo.ti_offset = ti_offset;
+ entry = htab_find_slot (ht, &test, 1, hash_tlsdesc, eq_tlsdesc);
+ if (*entry)
+ {
+ td = *entry;
+ return td;
+ }
+
+ *entry = td = _dl_malloc (sizeof (struct tlsdesc_dynamic_arg));
+ /* This may be higher than the map's generation, but it doesn't
+ matter much. Worst case, we'll have one extra DTV update per
+ thread. */
+ td->gen_count = map_generation (map);
+ td->tlsinfo = test.tlsinfo;
+
+ return td;
+}
+
+# endif /* SHARED */
+
+#endif
diff --git a/ldso/ldso/dl-tls.c b/ldso/ldso/dl-tls.c
index 6679693f4..5d6d3b9d3 100644
--- a/ldso/ldso/dl-tls.c
+++ b/ldso/ldso/dl-tls.c
@@ -100,20 +100,16 @@ _dl_realloc (void * __ptr, size_t __size)
* the static TLS area already allocated for each running thread. If this
* object's TLS segment is too big to fit, we fail. If it fits,
* we set MAP->l_tls_offset and return.
- * This function intentionally does not return any value but signals error
- * directly, as static TLS should be rare and code handling it should
- * not be inlined as much as possible.
*/
-void
-internal_function __attribute_noinline__
-_dl_allocate_static_tls (struct link_map *map)
+int
+internal_function
+_dl_try_allocate_static_tls (struct link_map* map)
{
/* If the alignment requirements are too high fail. */
if (map->l_tls_align > _dl_tls_static_align)
{
fail:
- _dl_dprintf(2, "cannot allocate memory in static TLS block");
- _dl_exit(30);
+ return -1;
}
# ifdef TLS_TCB_AT_TP
@@ -169,6 +165,23 @@ fail:
}
else
map->l_need_tls_init = 1;
+
+ return 0;
+}
+
+/*
+ * This function intentionally does not return any value but signals error
+ * directly, as static TLS should be rare and code handling it should
+ * not be inlined as much as possible.
+ */
+void
+internal_function __attribute_noinline__
+_dl_allocate_static_tls (struct link_map *map)
+{
+ if (_dl_try_allocate_static_tls (map)) {
+ _dl_dprintf(2, "cannot allocate memory in static TLS block");
+ _dl_exit(30);
+ }
}
#ifdef SHARED
diff --git a/ldso/ldso/fdpic/dl-inlines.h b/ldso/ldso/fdpic/dl-inlines.h
index 14a491689..ebbd0334c 100644
--- a/ldso/ldso/fdpic/dl-inlines.h
+++ b/ldso/ldso/fdpic/dl-inlines.h
@@ -5,6 +5,8 @@
* Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
*/
+#include <inline-hashtab.h>
+
/* Initialize a DL_LOADADDR_TYPE given a got pointer and a complete load map. */
static __always_inline void
__dl_init_loadaddr_map(struct elf32_fdpic_loadaddr *loadaddr, Elf32_Addr dl_boot_got_pointer,
@@ -143,269 +145,18 @@ __dl_addr_in_loadaddr(void *p, struct elf32_fdpic_loadaddr loadaddr)
return 0;
}
-/*
- * The hashcode handling code below is heavily inspired in libiberty's
- * hashtab code, but with most adaptation points and support for
- * deleting elements removed.
- *
- * Copyright (C) 1999, 2000, 2001, 2002, 2003 Free Software Foundation, Inc.
- * Contributed by Vladimir Makarov (vmakarov@cygnus.com).
- */
-static __always_inline unsigned long
-higher_prime_number(unsigned long n)
-{
- /* These are primes that are near, but slightly smaller than, a power of two. */
- static const unsigned long primes[] = {
- 7,
- 13,
- 31,
- 61,
- 127,
- 251,
- 509,
- 1021,
- 2039,
- 4093,
- 8191,
- 16381,
- 32749,
- 65521,
- 131071,
- 262139,
- 524287,
- 1048573,
- 2097143,
- 4194301,
- 8388593,
- 16777213,
- 33554393,
- 67108859,
- 134217689,
- 268435399,
- 536870909,
- 1073741789,
- /* 4294967291 */
- ((unsigned long) 2147483647) + ((unsigned long) 2147483644),
- };
- const unsigned long *low = &primes[0];
- const unsigned long *high = &primes[ARRAY_SIZE(primes)];
-
- while (low != high) {
- const unsigned long *mid = low + (high - low) / 2;
- if (n > *mid)
- low = mid + 1;
- else
- high = mid;
- }
-
-#if 0
- /* If we've run out of primes, abort. */
- if (n > *low) {
- fprintf(stderr, "Cannot find prime bigger than %lu\n", n);
- abort();
- }
-#endif
-
- return *low;
-}
-
-struct funcdesc_ht
-{
- /* Table itself */
- struct funcdesc_value **entries;
-
- /* Current size (in entries) of the hash table */
- size_t size;
-
- /* Current number of elements */
- size_t n_elements;
-};
-
-static __always_inline int
-hash_pointer(const void *p)
+static int
+hash_pointer(void *p)
{
return (int) ((long)p >> 3);
}
-static __always_inline struct funcdesc_ht *
-htab_create(void)
-{
- struct funcdesc_ht *ht = _dl_malloc(sizeof(*ht));
- size_t ent_size;
-
- if (!ht)
- return NULL;
- ht->size = 3;
- ent_size = sizeof(struct funcdesc_ht_value *) * ht->size;
- ht->entries = _dl_malloc(ent_size);
- if (!ht->entries)
- return NULL;
-
- ht->n_elements = 0;
- _dl_memset(ht->entries, 0, ent_size);
-
- return ht;
-}
-
-/*
- * This is only called from _dl_loadaddr_unmap, so it's safe to call
- * _dl_free(). See the discussion below.
- */
-static __always_inline void
-htab_delete(struct funcdesc_ht *htab)
+static int
+eq_pointer(void *p, void *q)
{
- size_t i;
-
- for (i = htab->size - 1; i >= 0; i--)
- if (htab->entries[i])
- _dl_free(htab->entries[i]);
-
- _dl_free(htab->entries);
- _dl_free(htab);
-}
-
-/*
- * Similar to htab_find_slot, but without several unwanted side effects:
- * - Does not call htab->eq_f when it finds an existing entry.
- * - Does not change the count of elements/searches/collisions in the
- * hash table.
- * This function also assumes there are no deleted entries in the table.
- * HASH is the hash value for the element to be inserted.
- */
-static __always_inline struct funcdesc_value **
-find_empty_slot_for_expand(struct funcdesc_ht *htab, int hash)
-{
- size_t size = htab->size;
- unsigned int index = hash % size;
- struct funcdesc_value **slot = htab->entries + index;
- int hash2;
-
- if (!*slot)
- return slot;
-
- hash2 = 1 + hash % (size - 2);
- for (;;) {
- index += hash2;
- if (index >= size)
- index -= size;
-
- slot = htab->entries + index;
- if (!*slot)
- return slot;
- }
-}
-
-/*
- * The following function changes size of memory allocated for the
- * entries and repeatedly inserts the table elements. The occupancy
- * of the table after the call will be about 50%. Naturally the hash
- * table must already exist. Remember also that the place of the
- * table entries is changed. If memory allocation failures are allowed,
- * this function will return zero, indicating that the table could not be
- * expanded. If all goes well, it will return a non-zero value.
- */
-static __always_inline int
-htab_expand(struct funcdesc_ht *htab)
-{
- struct funcdesc_value **oentries;
- struct funcdesc_value **olimit;
- struct funcdesc_value **p;
- struct funcdesc_value **nentries;
- size_t nsize;
-
- oentries = htab->entries;
- olimit = oentries + htab->size;
-
- /*
- * Resize only when table after removal of unused elements is either
- * too full or too empty.
- */
- if (htab->n_elements * 2 > htab->size)
- nsize = higher_prime_number(htab->n_elements * 2);
- else
- nsize = htab->size;
-
- nentries = _dl_malloc(sizeof(*nentries) * nsize);
- _dl_memset(nentries, 0, sizeof(*nentries) * nsize);
- if (nentries == NULL)
- return 0;
- htab->entries = nentries;
- htab->size = nsize;
-
- p = oentries;
- do {
- if (*p)
- *find_empty_slot_for_expand(htab, hash_pointer((*p)->entry_point)) = *p;
- p++;
- } while (p < olimit);
-
-#if 0
- /*
- * We can't tell whether this was allocated by the _dl_malloc()
- * built into ld.so or malloc() in the main executable or libc,
- * and calling free() for something that wasn't malloc()ed could
- * do Very Bad Things (TM). Take the conservative approach
- * here, potentially wasting as much memory as actually used by
- * the hash table, even if multiple growths occur. That's not
- * so bad as to require some overengineered solution that would
- * enable us to keep track of how it was allocated.
- */
- _dl_free(oentries);
-#endif
- return 1;
-}
-
-/*
- * This function searches for a hash table slot containing an entry
- * equal to the given element. To delete an entry, call this with
- * INSERT = 0, then call htab_clear_slot on the slot returned (possibly
- * after doing some checks). To insert an entry, call this with
- * INSERT = 1, then write the value you want into the returned slot.
- * When inserting an entry, NULL may be returned if memory allocation
- * fails.
- */
-static __always_inline struct funcdesc_value **
-htab_find_slot(struct funcdesc_ht *htab, void *ptr, int insert)
-{
- unsigned int index;
- int hash, hash2;
- size_t size;
- struct funcdesc_value **entry;
-
- if (htab->size * 3 <= htab->n_elements * 4 &&
- htab_expand(htab) == 0)
- return NULL;
-
- hash = hash_pointer(ptr);
-
- size = htab->size;
- index = hash % size;
-
- entry = &htab->entries[index];
- if (!*entry)
- goto empty_entry;
- else if ((*entry)->entry_point == ptr)
- return entry;
-
- hash2 = 1 + hash % (size - 2);
- for (;;) {
- index += hash2;
- if (index >= size)
- index -= size;
-
- entry = &htab->entries[index];
- if (!*entry)
- goto empty_entry;
- else if ((*entry)->entry_point == ptr)
- return entry;
- }
-
- empty_entry:
- if (!insert)
- return NULL;
+ struct funcdesc_value *entry = p;
- htab->n_elements++;
- return entry;
+ return entry->entry_point == q;
}
void *
@@ -424,7 +175,7 @@ _dl_funcdesc_for (void *entry_point, void *got_value)
tpnt->funcdesc_ht = ht;
}
- entry = htab_find_slot(ht, entry_point, 1);
+ entry = htab_find_slot(ht, entry_point, 1, hash_pointer, eq_pointer);
if (*entry) {
_dl_assert((*entry)->entry_point == entry_point);
return _dl_stabilize_funcdesc(*entry);
@@ -459,7 +210,8 @@ _dl_lookup_address(void const *address)
if (fd->got_value != rpnt->loadaddr.got_value)
continue;
- address = htab_find_slot(rpnt->funcdesc_ht, (void *)fd->entry_point, 0);
+ address = htab_find_slot(rpnt->funcdesc_ht, (void *)fd->entry_point, 0,
+ hash_pointer, eq_pointer);
if (address && *(struct funcdesc_value *const*)address == fd) {
address = (*(struct funcdesc_value *const*)address)->entry_point;
diff --git a/ldso/ldso/xtensa/dl-debug.h b/ldso/ldso/xtensa/dl-debug.h
index 4128d9452..18beae5ca 100644
--- a/ldso/ldso/xtensa/dl-debug.h
+++ b/ldso/ldso/xtensa/dl-debug.h
@@ -8,54 +8,31 @@
static const char * const _dl_reltypes_tab[] =
{
- "R_XTENSA_NONE",
- "R_XTENSA_32",
- "R_XTENSA_RTLD",
- "R_XTENSA_GLOB_DAT",
- "R_XTENSA_JMP_SLOT",
- "R_XTENSA_RELATIVE",
- "R_XTENSA_PLT",
- "R_XTENSA_UNUSED7",
- "R_XTENSA_OP0",
- "R_XTENSA_OP1",
- "R_XTENSA_OP2",
- "R_XTENSA_ASM_EXPAND",
- "R_XTENSA_ASM_SIMPLIFY",
- "R_XTENSA_UNUSED13",
- "R_XTENSA_UNUSED14",
- "R_XTENSA_GNU_VTINHERIT",
- "R_XTENSA_GNU_VTENTRY",
- "R_XTENSA_DIFF8",
- "R_XTENSA_DIFF16",
- "R_XTENSA_DIFF32",
- "R_XTENSA_SLOT0_OP",
- "R_XTENSA_SLOT1_OP",
- "R_XTENSA_SLOT2_OP",
- "R_XTENSA_SLOT3_OP",
- "R_XTENSA_SLOT4_OP",
- "R_XTENSA_SLOT5_OP",
- "R_XTENSA_SLOT6_OP",
- "R_XTENSA_SLOT7_OP",
- "R_XTENSA_SLOT8_OP",
- "R_XTENSA_SLOT9_OP",
- "R_XTENSA_SLOT10_OP",
- "R_XTENSA_SLOT11_OP",
- "R_XTENSA_SLOT12_OP",
- "R_XTENSA_SLOT13_OP",
- "R_XTENSA_SLOT14_OP",
- "R_XTENSA_SLOT0_ALT",
- "R_XTENSA_SLOT1_ALT",
- "R_XTENSA_SLOT2_ALT",
- "R_XTENSA_SLOT3_ALT",
- "R_XTENSA_SLOT4_ALT",
- "R_XTENSA_SLOT5_ALT",
- "R_XTENSA_SLOT6_ALT",
- "R_XTENSA_SLOT7_ALT",
- "R_XTENSA_SLOT8_ALT",
- "R_XTENSA_SLOT9_ALT",
- "R_XTENSA_SLOT10_ALT",
- "R_XTENSA_SLOT11_ALT",
- "R_XTENSA_SLOT12_ALT",
- "R_XTENSA_SLOT13_ALT",
- "R_XTENSA_SLOT14_ALT"
+ [0] "R_XTENSA_NONE", "R_XTENSA_32",
+ [2] "R_XTENSA_RTLD", "R_XTENSA_GLOB_DAT",
+ [4] "R_XTENSA_JMP_SLOT", "R_XTENSA_RELATIVE",
+ [6] "R_XTENSA_PLT", "R_XTENSA_UNUSED7",
+ [8] "R_XTENSA_OP0", "R_XTENSA_OP1",
+ [10] "R_XTENSA_OP2", "R_XTENSA_ASM_EXPAND",
+ [12] "R_XTENSA_ASM_SIMPLIFY", "R_XTENSA_UNUSED13",
+ [14] "R_XTENSA_UNUSED14", "R_XTENSA_GNU_VTINHERIT",
+ [16] "R_XTENSA_GNU_VTENTRY", "R_XTENSA_DIFF8",
+ [18] "R_XTENSA_DIFF16", "R_XTENSA_DIFF32",
+ [20] "R_XTENSA_SLOT0_OP", "R_XTENSA_SLOT1_OP",
+ [22] "R_XTENSA_SLOT2_OP", "R_XTENSA_SLOT3_OP",
+ [24] "R_XTENSA_SLOT4_OP", "R_XTENSA_SLOT5_OP",
+ [26] "R_XTENSA_SLOT6_OP", "R_XTENSA_SLOT7_OP",
+ [28] "R_XTENSA_SLOT8_OP", "R_XTENSA_SLOT9_OP",
+ [30] "R_XTENSA_SLOT10_OP", "R_XTENSA_SLOT11_OP",
+ [32] "R_XTENSA_SLOT12_OP", "R_XTENSA_SLOT13_OP",
+ [34] "R_XTENSA_SLOT14_OP", "R_XTENSA_SLOT0_ALT",
+ [36] "R_XTENSA_SLOT1_ALT", "R_XTENSA_SLOT2_ALT",
+ [38] "R_XTENSA_SLOT3_ALT", "R_XTENSA_SLOT4_ALT",
+ [40] "R_XTENSA_SLOT5_ALT", "R_XTENSA_SLOT6_ALT",
+ [42] "R_XTENSA_SLOT7_ALT", "R_XTENSA_SLOT8_ALT",
+ [44] "R_XTENSA_SLOT9_ALT", "R_XTENSA_SLOT10_ALT",
+ [46] "R_XTENSA_SLOT11_ALT", "R_XTENSA_SLOT12_ALT",
+ [48] "R_XTENSA_SLOT13_ALT", "R_XTENSA_SLOT14_ALT",
+ [50] "R_XTENSA_TLSDESC_FN", "R_XTENSA_TLSDESC_ARG",
+ [52] "R_XTENSA_TLS_TPOFF"
};
diff --git a/ldso/ldso/xtensa/dl-startup.h b/ldso/ldso/xtensa/dl-startup.h
index b135a4cb8..70a6255d9 100644
--- a/ldso/ldso/xtensa/dl-startup.h
+++ b/ldso/ldso/xtensa/dl-startup.h
@@ -11,7 +11,7 @@
__asm__ (
" .text\n"
" .align 4\n"
- " .literal_position\n"
+ " .literal_position\n"
" .global _start\n"
" .type _start, @function\n"
" .hidden _start\n"
diff --git a/ldso/ldso/xtensa/dl-sysdep.h b/ldso/ldso/xtensa/dl-sysdep.h
index a0ed4e5f2..148de5b95 100644
--- a/ldso/ldso/xtensa/dl-sysdep.h
+++ b/ldso/ldso/xtensa/dl-sysdep.h
@@ -78,10 +78,13 @@ typedef struct xtensa_got_location_struct {
struct elf_resolve;
extern unsigned long _dl_linux_resolver (struct elf_resolve *, int);
-/* ELF_RTYPE_CLASS_PLT iff TYPE describes relocation of a PLT entry, so
- undefined references should not be allowed to define the value. */
+/* ELF_RTYPE_CLASS_PLT iff TYPE describes relocation of a PLT entry or
+ TLS variable, so undefined references should not be allowed to define
+ the value. */
#define elf_machine_type_class(type) \
- (((type) == R_XTENSA_JMP_SLOT) * ELF_RTYPE_CLASS_PLT)
+ (((type) == R_XTENSA_JMP_SLOT || (type) == R_XTENSA_TLS_TPOFF \
+ || (type) == R_XTENSA_TLSDESC_FN || (type) == R_XTENSA_TLSDESC_ARG) \
+ * ELF_RTYPE_CLASS_PLT)
/* Return the link-time address of _DYNAMIC. */
static __always_inline Elf32_Addr
diff --git a/ldso/ldso/xtensa/dl-tlsdesc.S b/ldso/ldso/xtensa/dl-tlsdesc.S
new file mode 100644
index 000000000..a6ebc949e
--- /dev/null
+++ b/ldso/ldso/xtensa/dl-tlsdesc.S
@@ -0,0 +1,96 @@
+/* Thread-local storage handling in the ELF dynamic linker. Xtensa version.
+ Copyright (C) 2012-2013 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library. If not, see
+ <http://www.gnu.org/licenses/>. */
+
+#include <sysdep.h>
+#include <tls.h>
+#include "tlsdesc.h"
+
+
+ .text
+ .align 4
+ .hidden _dl_tlsdesc_return
+ .global _dl_tlsdesc_return
+ .type _dl_tlsdesc_return, @function
+_dl_tlsdesc_return:
+ entry a1, 16
+ rur.threadptr a3
+ add a2, a2, a3
+ retw
+ .size _dl_tlsdesc_return, .-_dl_tlsdesc_return
+
+#ifdef SHARED
+
+
+ /* This function is used for symbols that need dynamic TLS.
+
+ The argument passed to this function points to the TLS descriptor.
+
+ The assembly code that follows is a rendition of the following
+ C code, hand-optimized a little bit.
+
+ ptrdiff_t
+ _dl_tlsdesc_dynamic(struct tlsdesc_dynamic_arg *td)
+ {
+ dtv_t *dtv = (dtv_t *)THREAD_DTV();
+ if (td->gen_count <= dtv[0].counter
+ && dtv[td->tlsinfo.ti_module].pointer.val
+ != TLS_DTV_UNALLOCATED)
+ return dtv[td->tlsinfo.ti_module].pointer.val
+ + td->tlsinfo.ti_offset - __builtin_thread_pointer();
+ return __tls_get_addr (&td->tlsinfo) - __builtin_thread_pointer();
+ }
+ */
+
+ .align 4
+ .hidden _dl_tlsdesc_dynamic
+ .global _dl_tlsdesc_dynamic
+ .type _dl_tlsdesc_dynamic, @function
+_dl_tlsdesc_dynamic:
+ entry a1, 32
+
+ /* dtv_t *dtv = (dtv_t *)THREAD_DTV(); */
+ rur.threadptr a3
+ l32i a4, a3, 0
+
+ /* if (td->gen_count <= dtv[0].counter */
+ l32i a6, a2, TLSDESC_GEN_COUNT
+ l32i a7, a4, 0
+ blt a7, a6, .Lslow
+
+ /* && dtv[td->tlsinfo.ti_module].pointer.val != TLS_DTV_UNALLOCATED) */
+ l32i a6, a2, TLSDESC_MODID
+ addx8 a6, a3, a6
+ l32i a6, a6, 0
+ beqi a6, -1, .Lslow
+
+ /* return dtv[td->tlsinfo.ti_module].pointer.val
+ + td->tlsinfo.ti_offset - __builtin_thread_pointer(); */
+ l32i a6, a2, TLSDESC_MODOFF
+ sub a2, a6, a3
+ retw
+
+ /* return __tls_get_addr (&td->tlsinfo) - __builtin_thread_pointer(); */
+.Lslow:
+ mov a10, a2
+ movi a8, __tls_get_addr
+ callx8 a8
+ sub a2, a10, a3
+ retw
+ .size _dl_tlsdesc_dynamic, .-_dl_tlsdesc_dynamic
+
+#endif /* SHARED */
diff --git a/ldso/ldso/xtensa/elfinterp.c b/ldso/ldso/xtensa/elfinterp.c
index b4cf9752d..1397e95c9 100644
--- a/ldso/ldso/xtensa/elfinterp.c
+++ b/ldso/ldso/xtensa/elfinterp.c
@@ -31,6 +31,8 @@
*/
#include "ldso.h"
+#include "dl-tls.h"
+#include "tlsdeschtab.h"
unsigned long
_dl_linux_resolver (struct elf_resolve *tpnt, int reloc_entry)
@@ -146,6 +148,9 @@ _dl_do_reloc (struct elf_resolve *tpnt, struct r_scope_elem *scope,
int reloc_type;
int symtab_index;
char *symname;
+#if defined USE_TLS && USE_TLS
+ struct elf_resolve *tls_tpnt = NULL;
+#endif
struct symbol_ref sym_ref;
ElfW(Addr) *reloc_addr;
ElfW(Addr) symbol_addr;
@@ -172,15 +177,22 @@ _dl_do_reloc (struct elf_resolve *tpnt, struct r_scope_elem *scope,
* here, so all bases should be covered.
*/
if (unlikely (!symbol_addr &&
+ ELF_ST_TYPE (sym_ref.sym->st_info) != STT_TLS &&
ELF_ST_BIND (sym_ref.sym->st_info) != STB_WEAK)) {
- _dl_dprintf (2, "%s: can't resolve symbol '%s'\n",
- _dl_progname, symname);
- _dl_exit (1);
+ return 1;
}
if (_dl_trace_prelink) {
_dl_debug_lookup (symname, tpnt, &symtab[symtab_index],
&sym_ref, elf_machine_type_class(reloc_type));
}
+#if defined USE_TLS && USE_TLS
+ tls_tpnt = sym_ref.tpnt;
+#endif
+ } else {
+ symbol_addr =symtab[symtab_index].st_value;
+#if defined USE_TLS && USE_TLS
+ tls_tpnt = tpnt;
+#endif
}
#if defined (__SUPPORT_LD_DEBUG__)
@@ -198,8 +210,8 @@ _dl_do_reloc (struct elf_resolve *tpnt, struct r_scope_elem *scope,
case R_XTENSA_RTLD:
if (rpnt->r_addend == 1) {
- /* Grab the function pointer stashed at the beginning of the
- GOT by the GOT_INIT function. */
+ /* Grab the function pointer stashed at the beginning
+ of the GOT by the GOT_INIT function. */
*reloc_addr = *(ElfW(Addr) *) tpnt->dynamic_info[DT_PLTGOT];
} else if (rpnt->r_addend == 2) {
/* Store the link map for the object. */
@@ -213,6 +225,35 @@ _dl_do_reloc (struct elf_resolve *tpnt, struct r_scope_elem *scope,
*reloc_addr += tpnt->loadaddr + rpnt->r_addend;
break;
+#if defined USE_TLS && USE_TLS
+ case R_XTENSA_TLS_TPOFF:
+ CHECK_STATIC_TLS((struct link_map *) tls_tpnt);
+ *reloc_addr = symbol_addr + tls_tpnt->l_tls_offset + rpnt->r_addend;
+ break;
+ case R_XTENSA_TLSDESC_FN:
+#ifndef SHARED
+ CHECK_STATIC_TLS((struct link_map *) tls_tpnt);
+#else
+ if (!TRY_STATIC_TLS ((struct link_map *) tls_tpnt))
+ *reloc_addr = (ElfW(Addr)) _dl_tlsdesc_dynamic;
+ else
+#endif
+ *reloc_addr = (ElfW(Addr)) _dl_tlsdesc_return;
+ break;
+ case R_XTENSA_TLSDESC_ARG:
+#ifndef SHARED
+ CHECK_STATIC_TLS((struct link_map *) tls_tpnt);
+#else
+ if (!TRY_STATIC_TLS ((struct link_map *) tls_tpnt))
+ *reloc_addr = (ElfW(Addr))
+ _dl_make_tlsdesc_dynamic((struct link_map *) tls_tpnt,
+ symbol_addr + *reloc_addr);
+ else
+#endif
+ *reloc_addr += symbol_addr + tls_tpnt->l_tls_offset;
+ break;
+#endif
+
default:
return -1; /* Calls _dl_exit(1). */
}
diff --git a/libc/sysdeps/linux/xtensa/Makefile.arch b/libc/sysdeps/linux/xtensa/Makefile.arch
index 277a1e325..b9b6b87d5 100644
--- a/libc/sysdeps/linux/xtensa/Makefile.arch
+++ b/libc/sysdeps/linux/xtensa/Makefile.arch
@@ -5,7 +5,10 @@
# Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
#
-CSRC-y := brk.c fork.c sigaction.c __syscall_error.c
+CSRC-y := brk.c sigaction.c __syscall_error.c
SSRC-y := bsd-_setjmp.S bsd-setjmp.S setjmp.S clone.S \
sigrestorer.S syscall.S mmap.S windowspill.S __longjmp.S vfork.S
+
+CSRC-$(if $(UCLIBC_HAS_THREADS_NATIVE),,y) += fork.c
+SSRC-$(if $(UCLIBC_HAS_THREADS_NATIVE),,y) += clone.S
diff --git a/libc/sysdeps/linux/xtensa/clone.S b/libc/sysdeps/linux/xtensa/clone.S
index aa79aa736..34d68a875 100644
--- a/libc/sysdeps/linux/xtensa/clone.S
+++ b/libc/sysdeps/linux/xtensa/clone.S
@@ -1,34 +1,38 @@
-/* Copyright (C) 2001, 2005, 2007 Free Software Foundation, Inc.
+/* Copyright (C) 2001, 2005 Free Software Foundation, Inc.
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.
+ modify it under the terms of the GNU Library General Public License as
+ published by the Free Software Foundation; either version 2 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.
+ Library 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/>. */
+ You should have received a copy of the GNU Library General Public
+ License along with the GNU C Library; see the file COPYING.LIB. If not,
+ write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA. */
/* clone is even more special than fork as it mucks with stacks
- and invokes a function in the right context after it's all over. */
+ and invokes a function in the right context after its all over. */
-#include "sysdep.h"
-#include <sys/syscall.h>
+#include <features.h>
+#include <sysdep.h>
#define _ERRNO_H 1
#include <bits/errno.h>
+#ifdef RESET_PID
+#include <tls.h>
+#endif
+#define __ASSEMBLY__
+#include <linux/sched.h>
-/* int clone (a2 = int (*fn)(void *arg),
- a3 = void *child_stack,
- a4 = int flags,
- a5 = void *arg,
- a6 = pid_t *ptid,
- a7 = struct user_desc *tls,
- 16(sp) = pid_t *ctid) */
+/* int clone(int (*fn)(void *arg), void *child_stack, int flags, void *arg,
+ a2 a3 a4 a5
+ pid_t *ptid, struct user_desc *tls, pid_t *ctid)
+ a6 a7 16(sp)
+*/
.text
ENTRY (__clone)
@@ -39,7 +43,7 @@ ENTRY (__clone)
/* a2 and a3 are candidates for destruction by system-call return
parameters. We don't need the stack pointer after the system
- call. We trust that the kernel will preserve a7, a9, and a6. */
+ call. We trust that the kernel will preserve a6, a7 and a9. */
mov a9, a5 /* save function argument */
mov a5, a7
@@ -48,19 +52,18 @@ ENTRY (__clone)
mov a6, a4
mov a4, a8
l32i a8, a1, 16 /* child_tid */
- movi a2, SYS_ify (clone)
-
- /* syscall (a2 = NR_clone,
- a6 = clone_flags,
- a3 = usp,
- a4 = parent_tid,
- a5 = child_tls,
- a8 = child_tid) */
+ movi a2, SYS_ify(clone)
+
+ /* syscall(NR_clone,clone_flags, usp, parent_tid, child_tls, child_tid)
+ a2 a6 a3 a4 a5 a8
+ */
+
syscall
bltz a2, SYSCALL_ERROR_LABEL
beqz a2, .Lthread_start
- /* Fall through for parent. */
+ /* fall through for parent */
+
.Lpseudo_end:
retw
@@ -69,32 +72,38 @@ ENTRY (__clone)
j SYSCALL_ERROR_LABEL
.Lthread_start:
- /* Start child thread. */
- movi a0, 0 /* terminate the stack frame */
+
+#if CLONE_THREAD != 0x00010000 || CLONE_VM != 0x00000100
+# error invalid values for CLONE_THREAD or CLONE_VM
+#endif
#ifdef RESET_PID
- /* Check and see if we need to reset the PID. */
- bbsi.l a6, 16, 1f /* CLONE_THREAD = 0x00010000 */
+ bbsi.l a6, 16, .Lskip_restore_pid /* CLONE_THREAD = 0x00010000 */
movi a2, -1
- bbsi.l a6, 8, 2f /* CLONE_VM = 0x00000100 */
- movi a2, SYS_ify (getpid)
+ bbsi a6, 8, .Lgotpid /* CLONE_VM = 0x00000100 */
+ movi a2, SYS_ify(getpid)
syscall
-2: rur a3, THREADPTR
- movi a4, PID_OFFSET
- add a4, a4, a3
- s32i a2, a4, 0
- movi a4, TID_OFFSET
- add a4, a4, a3
- s32i a2, a3, 0
-1:
-#endif /* RESET_PID */
-
+.Lgotpid:
+ rur a3, threadptr
+ movi a0, TLS_PRE_TCB_SIZE
+ sub a3, a3, a0
+ s32i a2, a3, PID
+ s32i a2, a3, TID
+.Lskip_restore_pid:
+#endif
+
+ /* start child thread */
+ movi a0, 0 /* terminate the stack frame */
mov a6, a9 /* load up the 'arg' parameter */
callx4 a7 /* call the user's function */
/* Call _exit. Note that any return parameter from the user's
- function in a6 is seen as inputs to _exit. */
- movi a2, JUMPTARGET(_exit)
+ function in a6 is seen as inputs to _exit. */
+#ifdef PIC
+ movi a2, _exit@PLT
+#else
+ movi a2, _exit
+#endif
callx4 a2
PSEUDO_END (__clone)
diff --git a/libc/sysdeps/linux/xtensa/fork.c b/libc/sysdeps/linux/xtensa/fork.c
index e9b681c67..4e4f937a0 100644
--- a/libc/sysdeps/linux/xtensa/fork.c
+++ b/libc/sysdeps/linux/xtensa/fork.c
@@ -20,6 +20,10 @@ pid_t fork(void)
{
return (pid_t) INLINE_SYSCALL(clone, 2, SIGCHLD, 0);
}
-lt_strong_alias(fork)
-lt_libc_hidden(fork)
+# ifdef __UCLIBC_HAS_THREADS__
+strong_alias(fork,__libc_fork)
+libc_hidden_weak(fork)
+# else
+libc_hidden_def(fork)
+# endif
#endif
diff --git a/libc/sysdeps/linux/xtensa/jmpbuf-unwind.h b/libc/sysdeps/linux/xtensa/jmpbuf-unwind.h
index 41f81dbad..4516d9398 100644
--- a/libc/sysdeps/linux/xtensa/jmpbuf-unwind.h
+++ b/libc/sysdeps/linux/xtensa/jmpbuf-unwind.h
@@ -1,25 +1,23 @@
-/* Copyright (C) 1997, 1998, 2007 Free Software Foundation, Inc.
- This file is part of the GNU C Library.
-
- The GNU C Library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Lesser General Public
- License as published by the Free Software Foundation; either
- version 2.1 of the License, or (at your option) any later version.
-
- The GNU C Library is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public
- License along with the GNU C Library; if not, see
- <http://www.gnu.org/licenses/>. */
-
-/* Test if longjmp to JMPBUF would unwind the frame containing a local
- variable at ADDRESS. */
-
+/*
+ * Copyright (C) 2000-2006 Erik Andersen <andersen@uclibc.org>
+ *
+ * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
+ */
#include <setjmp.h>
#include <jmpbuf-offsets.h>
+/* Test if longjmp to JMPBUF would unwind the frame
+ containing a local variable at ADDRESS. */
#define _JMPBUF_UNWINDS(jmpbuf, address) \
((void *) (address) < (void *) (jmpbuf)[JB_SP])
+
+#ifdef __UCLIBC_HAS_THREADS_NATIVE__
+#include <stdint.h>
+#include <unwind.h>
+
+#define _JMPBUF_CFA_UNWINDS_ADJ(_jmpbuf, _context, _adj) \
+ _JMPBUF_UNWINDS_ADJ (_jmpbuf, (void *) _Unwind_GetCFA (_context), _adj)
+
+#define _JMPBUF_UNWINDS_ADJ(_jmpbuf, _address, _adj) \
+ ((uintptr_t) (_address) - (_adj) < (uintptr_t) (_jmpbuf)[JB_SP] - (_adj))
+#endif
diff --git a/libc/sysdeps/linux/xtensa/sys/ptrace.h b/libc/sysdeps/linux/xtensa/sys/ptrace.h
new file mode 100644
index 000000000..882b8c8ed
--- /dev/null
+++ b/libc/sysdeps/linux/xtensa/sys/ptrace.h
@@ -0,0 +1,155 @@
+/* `ptrace' debugger support interface. Linux version.
+ Copyright (C) 1996, 1997, 1998, 1999, 2000, 2007
+ Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>. */
+
+#ifndef _SYS_PTRACE_H
+#define _SYS_PTRACE_H 1
+
+#include <features.h>
+
+/* Kludge away careless namespace pollution from the kernel. */
+
+#undef PTRACE_GETREGS
+#undef PTRACE_SETREGS
+#undef PTRACE_GETFPREGS
+#undef PTRACE_SETFPREGS
+#undef PTRACE_GETFPREGSIZE
+
+
+__BEGIN_DECLS
+
+/* Type of the REQUEST argument to `ptrace.' */
+enum __ptrace_request
+{
+ /* Indicate that the process making this request should be traced.
+ All signals received by this process can be intercepted by its
+ parent, and its parent can use the other `ptrace' requests. */
+ PTRACE_TRACEME = 0,
+#define PT_TRACE_ME PTRACE_TRACEME
+
+ /* Return the word in the process's text space at address ADDR. */
+ PTRACE_PEEKTEXT = 1,
+#define PT_READ_I PTRACE_PEEKTEXT
+
+ /* Return the word in the process's data space at address ADDR. */
+ PTRACE_PEEKDATA = 2,
+#define PT_READ_D PTRACE_PEEKDATA
+
+ /* Return the word in the process's user area at offset ADDR. */
+ PTRACE_PEEKUSER = 3,
+#define PT_READ_U PTRACE_PEEKUSER
+
+ /* Write the word DATA into the process's text space at address ADDR. */
+ PTRACE_POKETEXT = 4,
+#define PT_WRITE_I PTRACE_POKETEXT
+
+ /* Write the word DATA into the process's data space at address ADDR. */
+ PTRACE_POKEDATA = 5,
+#define PT_WRITE_D PTRACE_POKEDATA
+
+ /* Write the word DATA into the process's user area at offset ADDR. */
+ PTRACE_POKEUSER = 6,
+#define PT_WRITE_U PTRACE_POKEUSER
+
+ /* Continue the process. */
+ PTRACE_CONT = 7,
+#define PT_CONTINUE PTRACE_CONT
+
+ /* Kill the process. */
+ PTRACE_KILL = 8,
+#define PT_KILL PTRACE_KILL
+
+ /* Single step the process.
+ This is not supported on all machines. */
+ PTRACE_SINGLESTEP = 9,
+#define PT_STEP PTRACE_SINGLESTEP
+
+ /* Get all general purpose registers used by a processes.
+ This is not supported on all machines. */
+ PTRACE_GETREGS = 12,
+#define PT_GETREGS PTRACE_GETREGS
+
+ /* Set all general purpose registers used by a processes.
+ This is not supported on all machines. */
+ PTRACE_SETREGS = 13,
+#define PT_SETREGS PTRACE_SETREGS
+
+ /* Get all floating point registers used by a processes.
+ This is not supported on all machines. */
+ PTRACE_GETFPREGS = 14,
+#define PT_GETFPREGS PTRACE_GETFPREGS
+
+ /* Set all floating point registers used by a processes.
+ This is not supported on all machines. */
+ PTRACE_SETFPREGS = 15,
+#define PT_SETFPREGS PTRACE_SETFPREGS
+
+ /* Attach to a process that is already running. */
+ PTRACE_ATTACH = 16,
+#define PT_ATTACH PTRACE_ATTACH
+
+ /* Detach from a process attached to with PTRACE_ATTACH. */
+ PTRACE_DETACH = 17,
+#define PT_DETACH PTRACE_DETACH
+
+ /* Get size required for the buffer holding the floating point registers.
+ This is not supported on all machines. */
+ PTRACE_GETFPREGSIZE = 18,
+#define PT_GETFPREGSIZE PTRACE_GETFPREGSIZE
+
+ /* Continue and stop at the next (return from) syscall. */
+ PTRACE_SYSCALL = 24
+#define PT_SYSCALL PTRACE_SYSCALL
+};
+
+/* Options set using PTRACE_SETOPTIONS. */
+enum __ptrace_setoptions {
+ PTRACE_O_TRACESYSGOOD = 0x00000001,
+ PTRACE_O_TRACEFORK = 0x00000002,
+ PTRACE_O_TRACEVFORK = 0x00000004,
+ PTRACE_O_TRACECLONE = 0x00000008,
+ PTRACE_O_TRACEEXEC = 0x00000010,
+ PTRACE_O_TRACEVFORKDONE = 0x00000020,
+ PTRACE_O_TRACEEXIT = 0x00000040,
+ PTRACE_O_MASK = 0x0000007f
+};
+
+/* Wait extended result codes for the above trace options. */
+enum __ptrace_eventcodes {
+ PTRACE_EVENT_FORK = 1,
+ PTRACE_EVENT_VFORK = 2,
+ PTRACE_EVENT_CLONE = 3,
+ PTRACE_EVENT_EXEC = 4,
+ PTRACE_EVENT_VFORK_DONE = 5,
+ PTRACE_EVENT_EXIT = 6
+};
+
+/* Perform process tracing functions. REQUEST is one of the values
+ above, and determines the action to be taken.
+ For all requests except PTRACE_TRACEME, PID specifies the process to be
+ traced.
+
+ PID and the other arguments described above for the various requests should
+ appear (those that are used for the particular request) as:
+ pid_t PID, void *ADDR, int DATA, void *ADDR2
+ after REQUEST. */
+extern long int ptrace (enum __ptrace_request __request, ...) __THROW;
+
+__END_DECLS
+
+#endif /* _SYS_PTRACE_H */
diff --git a/libc/sysdeps/linux/xtensa/sysdep.h b/libc/sysdeps/linux/xtensa/sysdep.h
index afe95cc6a..cab4a2f8d 100644
--- a/libc/sysdeps/linux/xtensa/sysdep.h
+++ b/libc/sysdeps/linux/xtensa/sysdep.h
@@ -16,6 +16,10 @@
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
+#ifndef _LINUX_XTENSA_SYSDEP_H
+#define _LINUX_XTENSA_SYSDEP_H 1
+
+#include <common/sysdep.h>
#include <sys/syscall.h>
#ifdef __ASSEMBLER__
@@ -24,12 +28,6 @@
#define ASM_TYPE_DIRECTIVE(name, typearg) .type name, typearg
#define ASM_SIZE_DIRECTIVE(name) .size name, . - name
-#ifdef __STDC__
-#define C_LABEL(name) name :
-#else
-#define C_LABEL(name) name/**/:
-#endif
-
#define ENTRY(name) \
ASM_GLOBAL_DIRECTIVE C_SYMBOL_NAME(name); \
ASM_TYPE_DIRECTIVE (C_SYMBOL_NAME(name), @function); \
@@ -52,6 +50,15 @@
#undef END
#define END(name) ASM_SIZE_DIRECTIVE(name)
+/* Local label name for asm code. */
+#ifndef L
+# ifdef HAVE_ELF
+# define L(name) .L##name
+# else
+# define L(name) name
+# endif
+#endif
+
/* Define a macro for this directive so it can be removed in a few places. */
#define LITERAL_POSITION .literal_position
@@ -123,19 +130,7 @@
#define PSEUDO_END_ERRVAL(name) \
END (name)
-#undef ret_ERRVAL
-#define ret_ERRVAL retw
-
-#if defined RTLD_PRIVATE_ERRNO
-# define SYSCALL_ERROR_HANDLER \
-0: movi a4, rtld_errno; \
- neg a2, a2; \
- s32i a2, a4, 0; \
- movi a2, -1; \
- j .Lpseudo_end;
-
-#elif defined _LIBC_REENTRANT
-
+#if defined _LIBC_REENTRANT
# if defined USE___THREAD
# ifndef NOT_IN_libc
# define SYSCALL_ERROR_ERRNO __libc_errno
@@ -170,3 +165,9 @@
#endif /* _LIBC_REENTRANT */
#endif /* __ASSEMBLER__ */
+
+/* Pointer mangling is not yet supported for Xtensa. */
+#define PTR_MANGLE(var) (void) (var)
+#define PTR_DEMANGLE(var) (void) (var)
+
+#endif /* _LINUX_XTENSA_SYSDEP_H */
diff --git a/libc/sysdeps/linux/xtensa/vfork.S b/libc/sysdeps/linux/xtensa/vfork.S
index f094ae38f..6aced0a50 100644
--- a/libc/sysdeps/linux/xtensa/vfork.S
+++ b/libc/sysdeps/linux/xtensa/vfork.S
@@ -1,4 +1,4 @@
-/* Copyright (C) 2005, 2007 Free Software Foundation, Inc.
+/* Copyright (C) 2005-2013 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
@@ -19,72 +19,67 @@
#include <sys/syscall.h>
#define _SIGNAL_H
#include <bits/signum.h>
+#define __ASSEMBLY__
+#include <linux/sched.h>
-/* Clone the calling process, but without copying the whole address space.
+/*
+ Clone the calling process, but without copying the whole address space.
The calling process is suspended until the new process exits or is
replaced by a call to `execve'. Return -1 for errors, 0 to the new process,
and the process ID of the new process to the old process.
Note that it is important that we don't create a new stack frame for the
- caller. */
+ caller.
-
-/* The following are defined in linux/sched.h, which unfortunately
- is not safe for inclusion in an assembly file. */
-#define CLONE_VM 0x00000100 /* set if VM shared between processes */
-#define CLONE_VFORK 0x00004000 /* set if the parent wants the child to
- wake it up on mm_release */
+*/
#ifndef SAVE_PID
-#define SAVE_PID
+#define SAVE_PID(a,b,c,d)
#endif
-
#ifndef RESTORE_PID
-#define RESTORE_PID
+#define RESTORE_PID(a,b,c)
+#endif
+#ifndef RESTORE_PID12
+#define RESTORE_PID12(a,b,c)
#endif
+/*
+ pid_t vfork(void);
+ Implemented as __clone_syscall(CLONE_VFORK | CLONE_VM | SIGCHLD, 0)
+ */
-/* pid_t vfork(void);
- Implemented as __clone_syscall(CLONE_VFORK | CLONE_VM | SIGCHLD, 0) */
HIDDEN_ENTRY (__vfork)
+ .literal .Ljumptable, 0, .L4, .L8, .L12
- movi a6, .Ljumptable
- extui a2, a0, 30, 2 /* call-size: call4/8/12 = 1/2/3 */
- addx4 a4, a2, a6 /* find return address in jumptable */
- l32i a4, a4, 0
- add a4, a4, a6
-
+ mov a3, a0 # move return address out of the way
+ movi a0, .Ljumptable
+ extui a2, a3, 30, 2 # call-size: call4/8/12 = 1/2/3
+ addx4 a0, a2, a0 # find return address in jumptable
slli a2, a2, 30
- xor a3, a0, a2 /* remove call-size from return addr */
- extui a5, a4, 30, 2 /* get high bits of jump target */
- slli a5, a5, 30
- or a3, a3, a5 /* stuff them into the return address */
- xor a4, a4, a5 /* clear high bits of jump target */
- or a0, a4, a2 /* create temporary return address */
- retw /* "return" to .L4, .L8, or .L12 */
-
- .align 4
-.Ljumptable:
- .word 0
- .word .L4 - .Ljumptable
- .word .L8 - .Ljumptable
- .word .L12 - .Ljumptable
+ l32i a0, a0, 0
+
+ xor a3, a3, a2 # remove call-size from return address
+ or a0, a0, a2 # create temporary return address
+ retw
/* a7: return address */
+
.L4: mov a12, a2
mov a13, a3
- SAVE_PID
+ SAVE_PID(a5,a15,a2,a3)
+
+ /* use syscall 'clone' and set new stack pointer to the same address */
- /* Use syscall 'clone'. Set new stack pointer to the same address. */
- movi a2, SYS_ify (clone)
+ movi a2, SYS_ify(clone)
movi a3, 0
movi a6, CLONE_VM | CLONE_VFORK | SIGCHLD
+
syscall
- RESTORE_PID
+ RESTORE_PID(a5,a15,a2)
movi a5, -4096
@@ -94,22 +89,24 @@ HIDDEN_ENTRY (__vfork)
bgeu a6, a5, 1f
jx a7
-1: call4 .Lerr /* returns to original caller */
+1: call4 .Lerr
/* a11: return address */
+
.L8: mov a12, a2
mov a13, a3
mov a14, a6
- SAVE_PID
+ SAVE_PID(a9,a15,a2,a3)
- movi a2, SYS_ify (clone)
+ movi a2, SYS_ify(clone)
movi a3, 0
movi a6, CLONE_VM | CLONE_VFORK | SIGCHLD
+
syscall
- RESTORE_PID
+ RESTORE_PID(a9,a15,a2)
movi a9, -4096
@@ -120,22 +117,25 @@ HIDDEN_ENTRY (__vfork)
bgeu a10, a9, 1f
jx a11
-1: call8 .Lerr /* returns to original caller */
+
+1: call8 .Lerr
/* a15: return address */
+
.L12: mov a12, a2
mov a13, a3
mov a14, a6
- SAVE_PID
+ SAVE_PID (a2,a3,a2,a6)
- movi a2, SYS_ify (clone)
+ movi a2, SYS_ify(clone)
movi a3, 0
movi a6, CLONE_VM | CLONE_VFORK | SIGCHLD
+
syscall
- RESTORE_PID
+ RESTORE_PID12(a3,a6,a15)
mov a3, a13
movi a13, -4096
@@ -147,18 +147,18 @@ HIDDEN_ENTRY (__vfork)
bgeu a14, a13, 1f
jx a15
-1: call12 .Lerr /* returns to original caller */
+1: call12 .Lerr
.align 4
+
.Lerr: entry a1, 16
- /* Restore the return address. */
- extui a4, a0, 30, 2 /* get the call-size bits */
+ /* Restore return address */
+
+ extui a4, a0, 30, 2
slli a4, a4, 30
- slli a3, a3, 2 /* clear high bits of target address */
- srli a3, a3, 2
- or a0, a3, a4 /* combine them */
+ or a0, a3, a4
PSEUDO_END (__vfork)
.Lpseudo_end:
diff --git a/libpthread/nptl/sysdeps/unix/sysv/linux/lowlevellock.c b/libpthread/nptl/sysdeps/unix/sysv/linux/lowlevellock.c
index 2a5bf6dd9..75369bd70 100644
--- a/libpthread/nptl/sysdeps/unix/sysv/linux/lowlevellock.c
+++ b/libpthread/nptl/sysdeps/unix/sysv/linux/lowlevellock.c
@@ -22,8 +22,6 @@
#include <lowlevellock.h>
#include <sys/time.h>
#include <tls.h>
-#include <tcb-offsets.h>
-
void
#ifndef IS_IN_libpthread
diff --git a/libpthread/nptl/sysdeps/unix/sysv/linux/xtensa/Makefile.arch b/libpthread/nptl/sysdeps/unix/sysv/linux/xtensa/Makefile.arch
new file mode 100644
index 000000000..8ebe28773
--- /dev/null
+++ b/libpthread/nptl/sysdeps/unix/sysv/linux/xtensa/Makefile.arch
@@ -0,0 +1,15 @@
+# uClibc-ng project
+# Licensed under the LGPL v2.1, see the file COPYING and LICENSE.
+
+libc_linux_arch_CSRC = fork.c
+libc_linux_arch_SSRC = clone.S vfork.S
+libpthread_linux_arch_CSRC = pthread_once.c
+libpthread_linux_arch_SSRC =
+
+CFLAGS-OMIT-fork.c = -DNOT_IN_libc -DIS_IN_libpthread
+ASFLAGS-pt-vfork.S = -DNOT_IN_libc -DIS_IN_libpthread -D_LIBC_REENTRANT
+
+ASFLAGS-clone.S = -D_LIBC_REENTRANT
+ASFLAGS-vfork.S = -D_LIBC_REENTRANT
+ASFLAGS-syscall.S = -D_LIBC_REENTRANT
+ASFLAGS-mmap.S = -D_LIBC_REENTRANT
diff --git a/libpthread/nptl/sysdeps/unix/sysv/linux/xtensa/bits/pthreadtypes.h b/libpthread/nptl/sysdeps/unix/sysv/linux/xtensa/bits/pthreadtypes.h
new file mode 100644
index 000000000..5e4402088
--- /dev/null
+++ b/libpthread/nptl/sysdeps/unix/sysv/linux/xtensa/bits/pthreadtypes.h
@@ -0,0 +1,184 @@
+/* Copyright (C) 2002-2012 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library. If not, see
+ <http://www.gnu.org/licenses/>. */
+
+#ifndef _BITS_PTHREADTYPES_H
+#define _BITS_PTHREADTYPES_H 1
+
+#include <endian.h>
+
+#define __SIZEOF_PTHREAD_ATTR_T 36
+#define __SIZEOF_PTHREAD_MUTEX_T 24
+#define __SIZEOF_PTHREAD_MUTEXATTR_T 4
+#define __SIZEOF_PTHREAD_COND_T 48
+#define __SIZEOF_PTHREAD_COND_COMPAT_T 12
+#define __SIZEOF_PTHREAD_CONDATTR_T 4
+#define __SIZEOF_PTHREAD_RWLOCK_T 32
+#define __SIZEOF_PTHREAD_RWLOCKATTR_T 8
+#define __SIZEOF_PTHREAD_BARRIER_T 20
+#define __SIZEOF_PTHREAD_BARRIERATTR_T 4
+
+
+/* Thread identifiers. The structure of the attribute type is not
+ exposed on purpose. */
+typedef unsigned long int pthread_t;
+
+
+union pthread_attr_t
+{
+ char __size[__SIZEOF_PTHREAD_ATTR_T];
+ long int __align;
+};
+#ifndef __have_pthread_attr_t
+typedef union pthread_attr_t pthread_attr_t;
+# define __have_pthread_attr_t 1
+#endif
+
+
+typedef struct __pthread_internal_slist
+{
+ struct __pthread_internal_slist *__next;
+} __pthread_slist_t;
+
+
+/* Data structures for mutex handling. The structure of the attribute
+ type is not exposed on purpose. */
+typedef union
+{
+ struct __pthread_mutex_s
+ {
+ int __lock;
+ unsigned int __count;
+ int __owner;
+ /* KIND must stay at this position in the structure to maintain
+ binary compatibility. */
+ int __kind;
+ unsigned int __nusers;
+ __extension__ union
+ {
+ int __spins;
+ __pthread_slist_t __list;
+ };
+ } __data;
+ char __size[__SIZEOF_PTHREAD_MUTEX_T];
+ long int __align;
+} pthread_mutex_t;
+
+typedef union
+{
+ char __size[__SIZEOF_PTHREAD_MUTEXATTR_T];
+ long int __align;
+} pthread_mutexattr_t;
+
+
+/* Data structure for conditional variable handling. The structure of
+ the attribute type is not exposed on purpose. */
+typedef union
+{
+ struct
+ {
+ int __lock;
+ unsigned int __futex;
+ __extension__ unsigned long long int __total_seq;
+ __extension__ unsigned long long int __wakeup_seq;
+ __extension__ unsigned long long int __woken_seq;
+ void *__mutex;
+ unsigned int __nwaiters;
+ unsigned int __broadcast_seq;
+ } __data;
+ char __size[__SIZEOF_PTHREAD_COND_T];
+ __extension__ long long int __align;
+} pthread_cond_t;
+
+typedef union
+{
+ char __size[__SIZEOF_PTHREAD_CONDATTR_T];
+ long int __align;
+} pthread_condattr_t;
+
+
+/* Keys for thread-specific data */
+typedef unsigned int pthread_key_t;
+
+
+/* Once-only execution */
+typedef int pthread_once_t;
+
+
+#if defined __USE_UNIX98 || defined __USE_XOPEN2K
+/* Data structure for read-write lock variable handling. The
+ structure of the attribute type is not exposed on purpose. */
+typedef union
+{
+ struct
+ {
+ int __lock;
+ unsigned int __nr_readers;
+ unsigned int __readers_wakeup;
+ unsigned int __writer_wakeup;
+ unsigned int __nr_readers_queued;
+ unsigned int __nr_writers_queued;
+#if __BYTE_ORDER == __BIG_ENDIAN
+ unsigned char __pad1;
+ unsigned char __pad2;
+ unsigned char __shared;
+ /* FLAGS must stay at this position in the structure to maintain
+ binary compatibility. */
+ unsigned char __flags;
+#else
+ /* FLAGS must stay at this position in the structure to maintain
+ binary compatibility. */
+ unsigned char __flags;
+ unsigned char __shared;
+ unsigned char __pad1;
+ unsigned char __pad2;
+#endif
+ int __writer;
+ } __data;
+ char __size[__SIZEOF_PTHREAD_RWLOCK_T];
+ long int __align;
+} pthread_rwlock_t;
+
+typedef union
+{
+ char __size[__SIZEOF_PTHREAD_RWLOCKATTR_T];
+ long int __align;
+} pthread_rwlockattr_t;
+#endif
+
+
+#ifdef __USE_XOPEN2K
+/* POSIX spinlock data type. */
+typedef volatile int pthread_spinlock_t;
+
+
+/* POSIX barriers data type. The structure of the type is
+ deliberately not exposed. */
+typedef union
+{
+ char __size[__SIZEOF_PTHREAD_BARRIER_T];
+ long int __align;
+} pthread_barrier_t;
+
+typedef union
+{
+ char __size[__SIZEOF_PTHREAD_BARRIERATTR_T];
+ int __align;
+} pthread_barrierattr_t;
+#endif
+
+
+#endif /* bits/pthreadtypes.h */
diff --git a/libpthread/nptl/sysdeps/unix/sysv/linux/xtensa/bits/semaphore.h b/libpthread/nptl/sysdeps/unix/sysv/linux/xtensa/bits/semaphore.h
new file mode 100644
index 000000000..8845cf009
--- /dev/null
+++ b/libpthread/nptl/sysdeps/unix/sysv/linux/xtensa/bits/semaphore.h
@@ -0,0 +1,35 @@
+/* Copyright (C) 2012 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#ifndef _SEMAPHORE_H
+# error "Never use <bits/semaphore.h> directly; include <semaphore.h> instead."
+#endif
+
+
+#define __SIZEOF_SEM_T 16
+
+
+/* Value returned if `sem_open' failed. */
+#define SEM_FAILED ((sem_t *) 0)
+
+
+typedef union
+{
+ char __size[__SIZEOF_SEM_T];
+ long int __align;
+} sem_t;
diff --git a/libpthread/nptl/sysdeps/unix/sysv/linux/xtensa/clone.S b/libpthread/nptl/sysdeps/unix/sysv/linux/xtensa/clone.S
new file mode 100644
index 000000000..539b9ef38
--- /dev/null
+++ b/libpthread/nptl/sysdeps/unix/sysv/linux/xtensa/clone.S
@@ -0,0 +1,3 @@
+#define RESET_PID
+#include <tcb-offsets.h>
+#include <libc/sysdeps/linux/xtensa/clone.S>
diff --git a/libpthread/nptl/sysdeps/unix/sysv/linux/xtensa/createthread.c b/libpthread/nptl/sysdeps/unix/sysv/linux/xtensa/createthread.c
new file mode 100644
index 000000000..2bb96e91a
--- /dev/null
+++ b/libpthread/nptl/sysdeps/unix/sysv/linux/xtensa/createthread.c
@@ -0,0 +1,24 @@
+/* Copyright (C) 2012 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+/* Value passed to 'clone' for initialization of the thread register. */
+#define TLS_VALUE (pd + 1)
+
+
+/* Get the real implementation. */
+#include <sysdeps/pthread/createthread.c>
diff --git a/libpthread/nptl/sysdeps/unix/sysv/linux/xtensa/fork.c b/libpthread/nptl/sysdeps/unix/sysv/linux/xtensa/fork.c
new file mode 100644
index 000000000..ba5c700da
--- /dev/null
+++ b/libpthread/nptl/sysdeps/unix/sysv/linux/xtensa/fork.c
@@ -0,0 +1,29 @@
+/* Copyright (C) 2013 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>. */
+
+#include <sched.h>
+#include <signal.h>
+#include <sysdep.h>
+#include <tls.h>
+
+
+#define ARCH_FORK() \
+ INLINE_SYSCALL (clone, 5, \
+ CLONE_CHILD_SETTID | CLONE_CHILD_CLEARTID | SIGCHLD, 0, \
+ NULL, NULL, &THREAD_SELF->tid)
+
+#include "../fork.c"
diff --git a/libpthread/nptl/sysdeps/unix/sysv/linux/xtensa/lowlevellock.c b/libpthread/nptl/sysdeps/unix/sysv/linux/xtensa/lowlevellock.c
new file mode 100644
index 000000000..756f39fd4
--- /dev/null
+++ b/libpthread/nptl/sysdeps/unix/sysv/linux/xtensa/lowlevellock.c
@@ -0,0 +1,132 @@
+/* low level locking for pthread library. Generic futex-using version.
+ Copyright (C) 2003-2013 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library. If not, see
+ <http://www.gnu.org/licenses/>. */
+
+#include <errno.h>
+#include <sysdep.h>
+#include <lowlevellock.h>
+#include <sys/time.h>
+
+void
+__lll_lock_wait_private (int *futex)
+{
+ do
+ {
+ int oldval = atomic_compare_and_exchange_val_acq (futex, 2, 1);
+ if (oldval != 0)
+ lll_futex_wait (futex, 2, LLL_PRIVATE);
+ }
+ while (atomic_compare_and_exchange_bool_acq (futex, 2, 0) != 0);
+}
+
+
+/* These functions don't get included in libc.so */
+#ifdef IS_IN_libpthread
+void
+__lll_lock_wait (int *futex, int private)
+{
+ do
+ {
+ int oldval = atomic_compare_and_exchange_val_acq (futex, 2, 1);
+ if (oldval != 0)
+ lll_futex_wait (futex, 2, private);
+ }
+ while (atomic_compare_and_exchange_bool_acq (futex, 2, 0) != 0);
+}
+
+
+int
+__lll_timedlock_wait (int *futex, const struct timespec *abstime, int private)
+{
+ struct timespec rt;
+
+ /* Reject invalid timeouts. */
+ if (abstime->tv_nsec < 0 || abstime->tv_nsec >= 1000000000)
+ return EINVAL;
+
+ /* Upgrade the lock. */
+ if (atomic_exchange_acq (futex, 2) == 0)
+ return 0;
+
+ do
+ {
+ struct timeval tv;
+
+ /* Get the current time. */
+ (void) __gettimeofday (&tv, NULL);
+
+ /* Compute relative timeout. */
+ rt.tv_sec = abstime->tv_sec - tv.tv_sec;
+ rt.tv_nsec = abstime->tv_nsec - tv.tv_usec * 1000;
+ if (rt.tv_nsec < 0)
+ {
+ rt.tv_nsec += 1000000000;
+ --rt.tv_sec;
+ }
+
+ /* Already timed out? */
+ if (rt.tv_sec < 0)
+ return ETIMEDOUT;
+
+ // XYZ: Lost the lock to check whether it was private.
+ lll_futex_timed_wait (futex, 2, &rt, private);
+ }
+ while (atomic_compare_and_exchange_bool_acq (futex, 2, 0) != 0);
+
+ return 0;
+}
+
+
+int
+__lll_timedwait_tid (int *tidp, const struct timespec *abstime)
+{
+ int tid;
+
+ if (abstime->tv_nsec < 0 || abstime->tv_nsec >= 1000000000)
+ return EINVAL;
+
+ /* Repeat until thread terminated. */
+ while ((tid = *tidp) != 0)
+ {
+ struct timeval tv;
+ struct timespec rt;
+
+ /* Get the current time. */
+ (void) __gettimeofday (&tv, NULL);
+
+ /* Compute relative timeout. */
+ rt.tv_sec = abstime->tv_sec - tv.tv_sec;
+ rt.tv_nsec = abstime->tv_nsec - tv.tv_usec * 1000;
+ if (rt.tv_nsec < 0)
+ {
+ rt.tv_nsec += 1000000000;
+ --rt.tv_sec;
+ }
+
+ /* Already timed out? */
+ if (rt.tv_sec < 0)
+ return ETIMEDOUT;
+
+ /* Wait until thread terminates. */
+ // XYZ: Lost the lock to check whether it was private.
+ if (lll_futex_timed_wait (tidp, tid, &rt, LLL_SHARED) == -ETIMEDOUT)
+ return ETIMEDOUT;
+ }
+
+ return 0;
+}
+#endif
diff --git a/libpthread/nptl/sysdeps/unix/sysv/linux/xtensa/lowlevellock.h b/libpthread/nptl/sysdeps/unix/sysv/linux/xtensa/lowlevellock.h
new file mode 100644
index 000000000..abe6e9c37
--- /dev/null
+++ b/libpthread/nptl/sysdeps/unix/sysv/linux/xtensa/lowlevellock.h
@@ -0,0 +1,293 @@
+/* Copyright (C) 2005-2013 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library. If not, see
+ <http://www.gnu.org/licenses/>. */
+
+#ifndef _LOWLEVELLOCK_H
+#define _LOWLEVELLOCK_H 1
+
+#include <time.h>
+#include <sys/param.h>
+#include <bits/pthreadtypes.h>
+#include <atomic.h>
+#include <sysdep.h>
+#include <bits/kernel-features.h>
+
+#define FUTEX_WAIT 0
+#define FUTEX_WAKE 1
+#define FUTEX_REQUEUE 3
+#define FUTEX_CMP_REQUEUE 4
+#define FUTEX_WAKE_OP 5
+#define FUTEX_OP_CLEAR_WAKE_IF_GT_ONE ((4 << 24) | 1)
+#define FUTEX_LOCK_PI 6
+#define FUTEX_UNLOCK_PI 7
+#define FUTEX_TRYLOCK_PI 8
+#define FUTEX_WAIT_BITSET 9
+#define FUTEX_WAKE_BITSET 10
+#define FUTEX_PRIVATE_FLAG 128
+#define FUTEX_CLOCK_REALTIME 256
+
+#define FUTEX_BITSET_MATCH_ANY 0xffffffff
+
+/* Values for 'private' parameter of locking macros. Yes, the
+ definition seems to be backwards. But it is not. The bit will be
+ reversed before passing to the system call. */
+#define LLL_PRIVATE 0
+#define LLL_SHARED FUTEX_PRIVATE_FLAG
+
+
+#if !defined NOT_IN_libc || defined IS_IN_rtld
+/* In libc.so or ld.so all futexes are private. */
+# ifdef __ASSUME_PRIVATE_FUTEX
+# define __lll_private_flag(fl, private) \
+ ((fl) | FUTEX_PRIVATE_FLAG)
+# else
+# define __lll_private_flag(fl, private) \
+ ((fl) | THREAD_GETMEM (THREAD_SELF, header.private_futex))
+# endif
+#else
+# ifdef __ASSUME_PRIVATE_FUTEX
+# define __lll_private_flag(fl, private) \
+ (((fl) | FUTEX_PRIVATE_FLAG) ^ (private))
+# else
+# define __lll_private_flag(fl, private) \
+ (__builtin_constant_p (private) \
+ ? ((private) == 0 \
+ ? ((fl) | THREAD_GETMEM (THREAD_SELF, header.private_futex)) \
+ : (fl)) \
+ : ((fl) | (((private) ^ FUTEX_PRIVATE_FLAG) \
+ & THREAD_GETMEM (THREAD_SELF, header.private_futex))))
+# endif
+#endif
+
+
+#define lll_futex_wait(futexp, val, private) \
+ lll_futex_timed_wait(futexp, val, NULL, private)
+
+#define lll_futex_timed_wait(futexp, val, timespec, private) \
+ ({ \
+ INTERNAL_SYSCALL_DECL (__err); \
+ long int __ret; \
+ __ret = INTERNAL_SYSCALL (futex, __err, 4, (futexp), \
+ __lll_private_flag (FUTEX_WAIT, private), \
+ (val), (timespec)); \
+ __ret; \
+ })
+
+#define lll_futex_timed_wait_bitset(futexp, val, timespec, clockbit, private) \
+ ({ \
+ INTERNAL_SYSCALL_DECL (__err); \
+ long int __ret; \
+ int __op = FUTEX_WAIT_BITSET | clockbit; \
+ __ret = INTERNAL_SYSCALL (futex, __err, 6, (futexp), \
+ __lll_private_flag (__op, private), \
+ (val), (timespec), NULL /* Unused. */, \
+ FUTEX_BITSET_MATCH_ANY); \
+ __ret; \
+ })
+
+#define lll_futex_wake(futexp, nr, private) \
+ ({ \
+ INTERNAL_SYSCALL_DECL (__err); \
+ long int __ret; \
+ __ret = INTERNAL_SYSCALL (futex, __err, 4, (futexp), \
+ __lll_private_flag (FUTEX_WAKE, private), \
+ (nr), 0); \
+ __ret; \
+ })
+
+#define lll_robust_dead(futexv, private) \
+ do \
+ { \
+ int *__futexp = &(futexv); \
+ atomic_or (__futexp, FUTEX_OWNER_DIED); \
+ lll_futex_wake (__futexp, 1, private); \
+ } \
+ while (0)
+
+/* Returns non-zero if error happened, zero if success. */
+#define lll_futex_requeue(futexp, nr_wake, nr_move, mutex, val, private) \
+ ({ \
+ INTERNAL_SYSCALL_DECL (__err); \
+ long int __ret; \
+ __ret = INTERNAL_SYSCALL (futex, __err, 6, (futexp), \
+ __lll_private_flag (FUTEX_CMP_REQUEUE, private),\
+ (nr_wake), (nr_move), (mutex), (val)); \
+ INTERNAL_SYSCALL_ERROR_P (__ret, __err); \
+ })
+
+
+/* Returns non-zero if error happened, zero if success. */
+#define lll_futex_wake_unlock(futexp, nr_wake, nr_wake2, futexp2, private) \
+ ({ \
+ INTERNAL_SYSCALL_DECL (__err); \
+ long int __ret; \
+ __ret = INTERNAL_SYSCALL (futex, __err, 6, (futexp), \
+ __lll_private_flag (FUTEX_WAKE_OP, private), \
+ (nr_wake), (nr_wake2), (futexp2), \
+ FUTEX_OP_CLEAR_WAKE_IF_GT_ONE); \
+ INTERNAL_SYSCALL_ERROR_P (__ret, __err); \
+ })
+
+
+#define lll_trylock(lock) \
+ atomic_compare_and_exchange_val_acq(&(lock), 1, 0)
+
+#define lll_cond_trylock(lock) \
+ atomic_compare_and_exchange_val_acq(&(lock), 2, 0)
+
+#define __lll_robust_trylock(futex, id) \
+ (atomic_compare_and_exchange_val_acq (futex, id, 0) != 0)
+#define lll_robust_trylock(lock, id) \
+ __lll_robust_trylock (&(lock), id)
+
+extern void __lll_lock_wait_private (int *futex) attribute_hidden;
+extern void __lll_lock_wait (int *futex, int private) attribute_hidden;
+extern int __lll_robust_lock_wait (int *futex, int private) attribute_hidden;
+
+#define __lll_lock(futex, private) \
+ ((void) ({ \
+ int *__futex = (futex); \
+ if (__builtin_expect (atomic_compare_and_exchange_val_acq (__futex, \
+ 1, 0), 0)) \
+ { \
+ if (__builtin_constant_p (private) && (private) == LLL_PRIVATE) \
+ __lll_lock_wait_private (__futex); \
+ else \
+ __lll_lock_wait (__futex, private); \
+ } \
+ }))
+#define lll_lock(futex, private) __lll_lock (&(futex), private)
+
+
+#define __lll_robust_lock(futex, id, private) \
+ ({ \
+ int *__futex = (futex); \
+ int __val = 0; \
+ \
+ if (__builtin_expect (atomic_compare_and_exchange_bool_acq (__futex, id, \
+ 0), 0)) \
+ __val = __lll_robust_lock_wait (__futex, private); \
+ __val; \
+ })
+#define lll_robust_lock(futex, id, private) \
+ __lll_robust_lock (&(futex), id, private)
+
+
+#define __lll_cond_lock(futex, private) \
+ ((void) ({ \
+ int *__futex = (futex); \
+ if (__builtin_expect (atomic_exchange_acq (__futex, 2), 0)) \
+ __lll_lock_wait (__futex, private); \
+ }))
+#define lll_cond_lock(futex, private) __lll_cond_lock (&(futex), private)
+
+
+#define lll_robust_cond_lock(futex, id, private) \
+ __lll_robust_lock (&(futex), (id) | FUTEX_WAITERS, private)
+
+
+extern int __lll_timedlock_wait (int *futex, const struct timespec *,
+ int private) attribute_hidden;
+extern int __lll_robust_timedlock_wait (int *futex, const struct timespec *,
+ int private) attribute_hidden;
+
+#define __lll_timedlock(futex, abstime, private) \
+ ({ \
+ int *__futex = (futex); \
+ int __val = 0; \
+ \
+ if (__builtin_expect (atomic_exchange_acq (__futex, 1), 0)) \
+ __val = __lll_timedlock_wait (__futex, abstime, private); \
+ __val; \
+ })
+#define lll_timedlock(futex, abstime, private) \
+ __lll_timedlock (&(futex), abstime, private)
+
+
+#define __lll_robust_timedlock(futex, abstime, id, private) \
+ ({ \
+ int *__futex = (futex); \
+ int __val = 0; \
+ \
+ if (__builtin_expect (atomic_compare_and_exchange_bool_acq (__futex, id, \
+ 0), 0)) \
+ __val = __lll_robust_timedlock_wait (__futex, abstime, private); \
+ __val; \
+ })
+#define lll_robust_timedlock(futex, abstime, id, private) \
+ __lll_robust_timedlock (&(futex), abstime, id, private)
+
+
+#define __lll_unlock(futex, private) \
+ (void) \
+ ({ int *__futex = (futex); \
+ int __oldval = atomic_exchange_rel (__futex, 0); \
+ if (__builtin_expect (__oldval > 1, 0)) \
+ lll_futex_wake (__futex, 1, private); \
+ })
+#define lll_unlock(futex, private) __lll_unlock(&(futex), private)
+
+
+#define __lll_robust_unlock(futex, private) \
+ (void) \
+ ({ int *__futex = (futex); \
+ int __oldval = atomic_exchange_rel (__futex, 0); \
+ if (__builtin_expect (__oldval & FUTEX_WAITERS, 0)) \
+ lll_futex_wake (__futex, 1, private); \
+ })
+#define lll_robust_unlock(futex, private) \
+ __lll_robust_unlock(&(futex), private)
+
+
+#define lll_islocked(futex) \
+ (futex != 0)
+
+
+/* Our internal lock implementation is identical to the binary-compatible
+ mutex implementation. */
+
+/* Initializers for lock. */
+#define LLL_LOCK_INITIALIZER (0)
+#define LLL_LOCK_INITIALIZER_LOCKED (1)
+
+/* The states of a lock are:
+ 0 - untaken
+ 1 - taken by one user
+ >1 - taken by more users */
+
+/* The kernel notifies a process which uses CLONE_CHILD_CLEARTID via futex
+ wakeup when the clone terminates. The memory location contains the
+ thread ID while the clone is running and is reset to zero
+ afterwards. */
+#define lll_wait_tid(tid) \
+ do { \
+ __typeof (tid) __tid; \
+ while ((__tid = (tid)) != 0) \
+ lll_futex_wait (&(tid), __tid, LLL_SHARED);\
+ } while (0)
+
+extern int __lll_timedwait_tid (int *, const struct timespec *)
+ attribute_hidden;
+
+#define lll_timedwait_tid(tid, abstime) \
+ ({ \
+ int __res = 0; \
+ if ((tid) != 0) \
+ __res = __lll_timedwait_tid (&(tid), (abstime)); \
+ __res; \
+ })
+
+#endif /* lowlevellock.h */
diff --git a/libpthread/nptl/sysdeps/unix/sysv/linux/xtensa/pt-initfini.c b/libpthread/nptl/sysdeps/unix/sysv/linux/xtensa/pt-initfini.c
new file mode 100644
index 000000000..4e6d26e81
--- /dev/null
+++ b/libpthread/nptl/sysdeps/unix/sysv/linux/xtensa/pt-initfini.c
@@ -0,0 +1,134 @@
+/* Special .init and .fini section support. Linuxthread version.
+ Copyright (C) 1995,1996,1997,2000,2001,2002 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it
+ and/or modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2 of the License, or (at your option) any later version.
+
+ In addition to the permissions in the GNU Lesser General Public
+ License, the Free Software Foundation gives you unlimited
+ permission to link the compiled version of this file with other
+ programs, and to distribute those programs without any restriction
+ coming from the use of this file. (The Library General Public
+ License restrictions do apply in other respects; for example, they
+ cover modification of the file, and distribution when not linked
+ into another program.)
+
+ 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; see the file COPYING.LIB. If not,
+ see <http://www.gnu.org/licenses/>. */
+
+/* This file is compiled into assembly code which is then munged by a sed
+ script into two files: crti.s and crtn.s.
+
+ * crti.s puts a function prologue at the beginning of the
+ .init and .fini sections and defines global symbols for
+ those addresses, so they can be called as functions.
+
+ * crtn.s puts the corresponding function epilogues
+ in the .init and .fini sections. */
+
+#include <stdlib.h>
+
+/* We use embedded asm for .section unconditionally, as this makes it
+ easier to insert the necessary directives into crtn.S. */
+#define SECTION(x) __asm__ (".section " x )
+
+/* Embed an #include to pull in the alignment and .end directives. */
+__asm__ ("\n#include \"defs.h\"");
+__asm__ ("\n#if defined __i686 && defined __ASSEMBLER__");
+__asm__ ("\n#undef __i686");
+__asm__ ("\n#define __i686 __i686");
+__asm__ ("\n#endif");
+
+/* The initial common code ends here. */
+__asm__ ("\n/*@HEADER_ENDS*/");
+
+/* To determine whether we need .end and .align: */
+__asm__ ("\n/*@TESTS_BEGIN*/");
+extern void dummy (void (*foo) (void));
+void
+dummy (void (*foo) (void))
+{
+ if (foo)
+ (*foo) ();
+}
+__asm__ ("\n/*@TESTS_END*/");
+
+/* The beginning of _init: */
+__asm__ ("\n/*@_init_PROLOG_BEGINS*/");
+
+static void
+call_initialize_minimal (void)
+{
+ extern void __pthread_initialize_minimal_internal (void)
+ __attribute ((visibility ("hidden")));
+
+ __pthread_initialize_minimal_internal ();
+}
+
+SECTION (".init");
+extern void __attribute__ ((section (".init"))) _init (void);
+void
+_init (void)
+{
+ /* The very first thing we must do is to set up the registers. */
+ call_initialize_minimal ();
+
+ __asm__ ("ALIGN");
+ __asm__("END_INIT");
+ /* Now the epilog. */
+ __asm__ ("\n/*@_init_PROLOG_ENDS*/");
+ __asm__ ("\n/*@_init_EPILOG_BEGINS*/");
+ SECTION(".init");
+}
+__asm__ ("END_INIT");
+
+/* End of the _init epilog, beginning of the _fini prolog. */
+__asm__ ("\n/*@_init_EPILOG_ENDS*/");
+__asm__ ("\n/*@_fini_PROLOG_BEGINS*/");
+
+SECTION (".fini");
+extern void __attribute__ ((section (".fini"))) _fini (void);
+void
+_fini (void)
+{
+
+ /* End of the _fini prolog. */
+ __asm__ ("ALIGN");
+ __asm__ ("END_FINI");
+ __asm__ ("\n/*@_fini_PROLOG_ENDS*/");
+
+ /* Xtensa: It doesn't really matter whether GCC thinks this is a leaf
+ function or not, and the scripts that are supposed to remove the
+ call don't catch the literal, resulting in an undefined symbol
+ reference. */
+#if 0
+ {
+ /* Let GCC know that _fini is not a leaf function by having a dummy
+ function call here. We arrange for this call to be omitted from
+ either crt file. */
+ extern void i_am_not_a_leaf (void);
+ i_am_not_a_leaf ();
+ }
+#endif
+
+ /* Beginning of the _fini epilog. */
+ __asm__ ("\n/*@_fini_EPILOG_BEGINS*/");
+ SECTION (".fini");
+}
+__asm__ ("END_FINI");
+
+/* End of the _fini epilog. Any further generated assembly (e.g. .ident)
+ is shared between both crt files. */
+__asm__ ("\n/*@_fini_EPILOG_ENDS*/");
+__asm__ ("\n/*@TRAILER_BEGINS*/");
+
+/* End of file. */
diff --git a/libpthread/nptl/sysdeps/unix/sysv/linux/xtensa/pthread_once.c b/libpthread/nptl/sysdeps/unix/sysv/linux/xtensa/pthread_once.c
new file mode 100644
index 000000000..46085d3b5
--- /dev/null
+++ b/libpthread/nptl/sysdeps/unix/sysv/linux/xtensa/pthread_once.c
@@ -0,0 +1,89 @@
+/* Copyright (C) 2004-2013 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library. If not, see
+ <http://www.gnu.org/licenses/>. */
+
+#include "pthreadP.h"
+#include <lowlevellock.h>
+
+unsigned long int __fork_generation attribute_hidden;
+
+static void
+clear_once_control (void *arg)
+{
+ pthread_once_t *once_control = (pthread_once_t *) arg;
+
+ *once_control = 0;
+ lll_futex_wake (once_control, INT_MAX, LLL_PRIVATE);
+}
+
+int
+__pthread_once (pthread_once_t *once_control, void (*init_routine) (void))
+{
+ for (;;)
+ {
+ int oldval;
+ int newval;
+
+ /* Pseudo code:
+ newval = __fork_generation | 1;
+ oldval = *once_control;
+ if ((oldval & 2) == 0)
+ *once_control = newval;
+ Do this atomically.
+ */
+ do
+ {
+ newval = __fork_generation | 1;
+ oldval = *once_control;
+ if (oldval & 2)
+ break;
+ } while (atomic_compare_and_exchange_val_acq (once_control, newval, oldval) != oldval);
+
+ /* Check if the initializer has already been done. */
+ if ((oldval & 2) != 0)
+ return 0;
+
+ /* Check if another thread already runs the initializer. */
+ if ((oldval & 1) == 0)
+ break;
+
+ /* Check whether the initializer execution was interrupted by a fork. */
+ if (oldval != newval)
+ break;
+
+ /* Same generation, some other thread was faster. Wait. */
+ lll_futex_wait (once_control, oldval, LLL_PRIVATE);
+ }
+
+ /* This thread is the first here. Do the initialization.
+ Register a cleanup handler so that in case the thread gets
+ interrupted the initialization can be restarted. */
+ pthread_cleanup_push (clear_once_control, once_control);
+
+ init_routine ();
+
+ pthread_cleanup_pop (0);
+
+ /* Say that the initialisation is done. */
+ *once_control = __fork_generation | 2;
+
+ /* Wake up all other threads. */
+ lll_futex_wake (once_control, INT_MAX, LLL_PRIVATE);
+
+ return 0;
+}
+weak_alias (__pthread_once, pthread_once)
+strong_alias (__pthread_once, __pthread_once_internal)
diff --git a/libpthread/nptl/sysdeps/unix/sysv/linux/xtensa/sysdep-cancel.h b/libpthread/nptl/sysdeps/unix/sysv/linux/xtensa/sysdep-cancel.h
new file mode 100644
index 000000000..6bb2aeb56
--- /dev/null
+++ b/libpthread/nptl/sysdeps/unix/sysv/linux/xtensa/sysdep-cancel.h
@@ -0,0 +1,108 @@
+/* Copyright (C) 2003 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#include <sysdep.h>
+#include <tls.h>
+/* #include <pt-machine.h> */
+#ifndef __ASSEMBLER__
+# include <pthreadP.h>
+#endif
+
+#if !defined NOT_IN_libc || defined IS_IN_libpthread || defined IS_IN_librt
+// FIXME: ENTRY includes an entry instruction, here we'd want entry sp, 48!
+# undef PSEUDO
+# define PSEUDO(name, syscall_name, args) \
+ .text; \
+ ENTRY (name) \
+ SINGLE_THREAD_P(a15); \
+ bnez a15, .Lpseudo_cancel; \
+ DO_CALL (syscall_name, args); \
+ bgez a2, .Lpseudo_done; \
+ movi a4, -4095; \
+ blt a2, a4, .Lpseudo_done; \
+ j SYSCALL_ERROR_LABEL; \
+ .Lpseudo_done: \
+ retw; \
+ .Lpseudo_cancel: \
+ /* The syscall args are in a2...a7; no need to save */ \
+ CENABLE; \
+ /* The return value is in a10 and preserved across the syscall */ \
+ DO_CALL (syscall_name, args); \
+ CDISABLE; \
+ bgez a2, .Lpseudo_end; \
+ movi a4, -4095; \
+ blt a2, a4, .Lpseudo_end; \
+ j SYSCALL_ERROR_LABEL; \
+ .Lpseudo_end:
+
+
+# ifdef IS_IN_libpthread
+# define CENABLE_FUNC __pthread_enable_asynccancel
+# define CDISABLE_FUNC __pthread_disable_asynccancel
+# define __local_multiple_threads __pthread_multiple_threads
+# elif !defined NOT_IN_libc
+# define CENABLE_FUNC __libc_enable_asynccancel
+# define CDISABLE_FUNC __libc_disable_asynccancel
+# define __local_multiple_threads __libc_multiple_threads
+# elif defined IS_IN_librt
+# define CENABLE_FUNC __librt_enable_asynccancel
+# define CDISABLE_FUNC __librt_disable_asynccancel
+# else
+# error Unsupported library
+# endif
+
+# define CENABLE movi a8, CENABLE_FUNC; \
+ callx8 a8
+# define CDISABLE movi a8, CDISABLE_FUNC; \
+ callx8 a8
+
+# if defined IS_IN_libpthread || !defined NOT_IN_libc
+# ifndef __ASSEMBLER__
+extern int __local_multiple_threads attribute_hidden;
+# define SINGLE_THREAD_P __builtin_expect (__local_multiple_threads == 0, 1)
+# else
+# define SINGLE_THREAD_P(reg) movi reg, __local_multiple_threads; \
+ l32i reg, reg, 0;
+# endif
+
+# else
+# ifndef __ASSEMBLER__
+# define SINGLE_THREAD_P \
+ __builtin_expect (THREAD_GETMEM (THREAD_SELF, \
+ header.multiple_threads) == 0, 1)
+# else
+# define SINGLE_THREAD_P(reg) \
+ rur reg, threadptr; \
+ l32i reg, reg, MULTIPLE_THREADS_OFFSET;
+# endif
+# endif
+
+#else
+
+/* This code should never be used but we define it anyhow. */
+# define SINGLE_THREAD_P (1)
+# define NO_CANCELLATION 1
+
+#endif
+
+
+#ifndef __ASSEMBLER__
+# define RTLD_SINGLE_THREAD_P \
+ __builtin_expect (THREAD_GETMEM (THREAD_SELF, \
+ header.multiple_threads) == 0, 1)
+#endif
diff --git a/libpthread/nptl/sysdeps/unix/sysv/linux/xtensa/vfork.S b/libpthread/nptl/sysdeps/unix/sysv/linux/xtensa/vfork.S
new file mode 100644
index 000000000..46eb76dd6
--- /dev/null
+++ b/libpthread/nptl/sysdeps/unix/sysv/linux/xtensa/vfork.S
@@ -0,0 +1,59 @@
+/* Copyright (C) 2013 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library. If not, see
+ <http://www.gnu.org/licenses/>. */
+
+#include <tls.h>
+
+/*
+ Save the PID value, save 0x80000000 if PID was 0.
+ Registers a2 and a3 are available; ar should return the PID and as threadptr
+ */
+
+#define SAVE_PID(pid,tp,ar,as) \
+ rur tp, threadptr; \
+ movi ar, TLS_PRE_TCB_SIZE; \
+ sub tp, tp, ar; \
+ l32i pid, tp, PID; \
+ neg ar, pid; \
+ movi as, 0x80000000; \
+ moveqz ar, as, ar; \
+ s32i ar, tp, PID; \
+
+/*
+ Restore the PID value, restore to 0 if saved value was 0x80000000
+ Return value from the syscall is in a2.
+ */
+#define RESTORE_PID(pid,tp,res) \
+ beqz res, 1f; \
+ s32i pid, tp, PID; \
+1:
+
+/*
+ Special version for call12, where we don't have enough registers
+ available to preserve the original PID.
+ */
+#define RESTORE_PID12(ar, as, at) \
+ rur as, threadptr; \
+ movi ar, TLS_PRE_TCB_SIZE; \
+ sub as, as, ar; \
+ l32i ar, as, PID; \
+ movi at, 0x80000000; \
+ sub at, at, ar; \
+ neg ar, ar; \
+ moveqz ar, at, at; \
+ s32i ar, as, PID;
+
+#include <libc/sysdeps/linux/xtensa/vfork.S>
diff --git a/libpthread/nptl/sysdeps/xtensa/Makefile.arch b/libpthread/nptl/sysdeps/xtensa/Makefile.arch
new file mode 100644
index 000000000..5bbd409c6
--- /dev/null
+++ b/libpthread/nptl/sysdeps/xtensa/Makefile.arch
@@ -0,0 +1,40 @@
+# Copyright (C) 2012 Free Software Foundation, Inc.
+# This file is part of the GNU C Library.
+#
+# The GNU C Library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# The GNU C Library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with the GNU C Library; if not, write to the Free
+# Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+# 02111-1307 USA.
+
+CFLAGS-pt-raise.c = -DNOT_IN_libc -DIS_IN_libpthread
+
+ASFLAGS-dl-tlsdesc.S = -DNOT_IN_libc=1
+ASFLAGS-pthread_spin_lock.S = -DNOT_IN_libc -DIS_IN_libpthread
+ASFLAGS-pthread_spin_trylock.S = -DNOT_IN_libc -DIS_IN_libpthread
+ASFLAGS-nptl-sysdep.S = -DNOT_IN_libc -DIS_IN_libpthread \
+ -D_LIBC_REENTRANT \
+ -I$(top_srcdir)libc/sysdeps/linux/xtensa
+
+libc_arch_a_CSRC = libc-tls.c
+librt_arch_a_SSRC = dl-tlsdesc.S
+
+CFLAGS-gen_tlsdesc.c = -S
+$(libpthread_arch_OUT)/gen_tlsdesc.c: $(libpthread_arch_DIR)/tlsdesc.sym | $(libpthread_arch_OUT)
+ $(do_awk) $(top_srcdir)extra/scripts/gen-as-const.awk $< > $@
+$(libpthread_arch_OUT)/gen_tlsdesc.s: $(libpthread_arch_OUT)/gen_tlsdesc.c | headers
+ $(compile.c)
+libpthread-generated-y += $(libpthread_arch_OUT)/gen_tlsdesc.s
+$(libpthread_arch_OUT)/tlsdesc.h: $(libpthread_arch_OUT)/gen_tlsdesc.s
+ $(do_sed) $(PTHREAD_GENERATE_MANGLE) $< > $@
+ @if test ! -s $@ ; then rm -f $@ ; false ; fi
+pregen-headers-$(UCLIBC_HAS_THREADS_NATIVE) += $(libpthread_arch_OUT)/tlsdesc.h
diff --git a/libpthread/nptl/sysdeps/xtensa/dl-tls.h b/libpthread/nptl/sysdeps/xtensa/dl-tls.h
new file mode 100644
index 000000000..29008dbb9
--- /dev/null
+++ b/libpthread/nptl/sysdeps/xtensa/dl-tls.h
@@ -0,0 +1,58 @@
+/* Thread-local storage handling in the ELF dynamic linker. Xtensa version.
+ Copyright (C) 2013 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#ifndef _XTENSA_DL_TLS_H
+#define _XTENSA_DL_TLS_H 1
+
+/* Type used for the representation of TLS information in the GOT. */
+typedef struct
+{
+ unsigned long int ti_module;
+ unsigned long int ti_offset;
+} tls_index;
+
+extern void *__tls_get_addr (tls_index *ti);
+
+/* Type used to represent a TLS descriptor. */
+struct tlsdesc
+{
+ union
+ {
+ void *pointer;
+ long value;
+ } argument;
+ ptrdiff_t (*entry)(struct tlsdesc *);
+};
+
+/* Type used as the argument in a TLS descriptor for a symbol that
+ needs dynamic TLS offsets. */
+struct tlsdesc_dynamic_arg
+{
+ tls_index tlsinfo;
+ size_t gen_count;
+};
+
+extern ptrdiff_t attribute_hidden
+ _dl_tlsdesc_return(struct tlsdesc_dynamic_arg *);
+
+extern void *_dl_make_tlsdesc_dynamic (struct link_map *map, size_t ti_offset);
+extern ptrdiff_t attribute_hidden
+ _dl_tlsdesc_dynamic(struct tlsdesc_dynamic_arg *);
+
+#endif
diff --git a/libpthread/nptl/sysdeps/xtensa/jmpbuf-unwind.h b/libpthread/nptl/sysdeps/xtensa/jmpbuf-unwind.h
new file mode 100644
index 000000000..bda498b8a
--- /dev/null
+++ b/libpthread/nptl/sysdeps/xtensa/jmpbuf-unwind.h
@@ -0,0 +1,32 @@
+/* Copyright (C) 2005,2006 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>. */
+
+#include <setjmp.h>
+#include <stdint.h>
+#include <unwind.h>
+
+/* Test if longjmp to JMPBUF would unwind the frame
+ containing a local variable at ADDRESS. */
+#undef _JMPBUF_UNWINDS
+#define _JMPBUF_UNWINDS(jmpbuf, address, demangle) \
+ ((void *) (address) < (void *) demangle (jmpbuf[JB_SP]))
+
+#define _JMPBUF_CFA_UNWINDS_ADJ(_jmpbuf, _context, _adj) \
+ _JMPBUF_UNWINDS_ADJ (_jmpbuf, (void *) _Unwind_GetCFA (_context), _adj)
+
+#define _JMPBUF_UNWINDS_ADJ(_jmpbuf, _address, _adj) \
+ ((uintptr_t) (_address) - (_adj) < (uintptr_t) (_jmpbuf)[JB_SP] - (_adj))
diff --git a/libpthread/nptl/sysdeps/xtensa/libc-tls.c b/libpthread/nptl/sysdeps/xtensa/libc-tls.c
new file mode 100644
index 000000000..80494c56f
--- /dev/null
+++ b/libpthread/nptl/sysdeps/xtensa/libc-tls.c
@@ -0,0 +1,36 @@
+/* Thread-local storage handling in the ELF dynamic linker. Xtensa version.
+ Copyright (C) 2005 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>. */
+
+#include <sysdeps/generic/libc-tls.c>
+#include <dl-tls.h>
+
+#if defined(USE_TLS) && USE_TLS
+
+/* On Xtensa, linker optimizations are not required, so __tls_get_addr
+ can be called even in statically linked binaries. In this case module
+ must be always 1 and PT_TLS segment exist in the binary, otherwise it
+ would not link. */
+
+void *
+__tls_get_addr (tls_index *ti)
+{
+ dtv_t *dtv = THREAD_DTV ();
+ return (char *) dtv[1].pointer.val + ti->ti_offset;
+}
+
+#endif
diff --git a/libpthread/nptl/sysdeps/xtensa/pthread_spin_lock.S b/libpthread/nptl/sysdeps/xtensa/pthread_spin_lock.S
new file mode 100644
index 000000000..1e220a863
--- /dev/null
+++ b/libpthread/nptl/sysdeps/xtensa/pthread_spin_lock.S
@@ -0,0 +1,37 @@
+/* Copyright (C) 2012 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+ .text
+ .align 4
+
+ .globl pthread_spin_lock
+pthread_spin_lock:
+
+ entry a1, 16
+
+ movi a3, 0
+ wsr a3, scompare1
+ movi a3, 1
+1: s32c1i a3, a2, 0
+ bnez a3, 1b
+ movi a2, 0
+
+ retw
+
+ .type pthread_spin_lock, @function
+ .size pthread_spin_lock, .-pthread_spin_lock
diff --git a/libpthread/nptl/sysdeps/xtensa/pthread_spin_trylock.S b/libpthread/nptl/sysdeps/xtensa/pthread_spin_trylock.S
new file mode 100644
index 000000000..a736b010f
--- /dev/null
+++ b/libpthread/nptl/sysdeps/xtensa/pthread_spin_trylock.S
@@ -0,0 +1,40 @@
+/* Copyright (C) 2005 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#define _ERRNO_H 1
+#include <bits/errno.h>
+
+ .text
+ .align 4
+
+ .globl pthread_spin_trylock
+pthread_spin_trylock:
+
+ entry a1, 16
+
+ movi a3, 0
+ wsr a3, scompare1
+ movi a3, 1
+ s32c1i a3, a2, 0
+ movi a2, EBUSY
+ moveqz a2, a3, a3
+
+ retw
+
+ .type pthread_spin_trylock, @function
+ .size pthread_spin_trylock, .-pthread_spin_trylock
diff --git a/libpthread/nptl/sysdeps/xtensa/pthreaddef.h b/libpthread/nptl/sysdeps/xtensa/pthreaddef.h
new file mode 100644
index 000000000..e72b4bc58
--- /dev/null
+++ b/libpthread/nptl/sysdeps/xtensa/pthreaddef.h
@@ -0,0 +1,39 @@
+/* Copyright (C) 2002, 2003, 2005 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+/* Default stack size. */
+#define ARCH_STACK_DEFAULT_SIZE (2 * 1024 * 1024)
+
+/* Required stack pointer alignment at beginning. */
+#define STACK_ALIGN 16
+
+/* Minimal stack size after allocating thread descriptor and guard size. */
+#define MINIMAL_REST_STACK 2048
+
+/* Alignment requirement for TCB. */
+#define TCB_ALIGNMENT 16
+
+
+/* Location of current stack frame. */
+#define CURRENT_STACK_FRAME __builtin_frame_address (0)
+
+
+/* XXX Until we have a better place keep the definitions here. */
+
+#define __exit_thread_inline(val) \
+ INLINE_SYSCALL (exit, 1, (val))
diff --git a/libpthread/nptl/sysdeps/xtensa/tcb-offsets.sym b/libpthread/nptl/sysdeps/xtensa/tcb-offsets.sym
new file mode 100644
index 000000000..4c8687647
--- /dev/null
+++ b/libpthread/nptl/sysdeps/xtensa/tcb-offsets.sym
@@ -0,0 +1,7 @@
+#include <sysdep.h>
+#include <tls.h>
+
+TLS_PRE_TCB_SIZE sizeof (struct pthread)
+MULTIPLE_THREADS_OFFSET offsetof (struct pthread, header.multiple_threads)
+PID offsetof (struct pthread, pid)
+TID offsetof (struct pthread, tid)
diff --git a/libpthread/nptl/sysdeps/xtensa/tls.h b/libpthread/nptl/sysdeps/xtensa/tls.h
new file mode 100644
index 000000000..f0cb27c01
--- /dev/null
+++ b/libpthread/nptl/sysdeps/xtensa/tls.h
@@ -0,0 +1,159 @@
+/* Definition for thread-local data handling. NPTL/Xtensa version.
+ Copyright (C) 2012 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#ifndef _TLS_H
+#define _TLS_H
+
+#ifndef __ASSEMBLER__
+
+# include <stdbool.h>
+# include <stddef.h>
+# include <stdint.h>
+
+/* Type for the dtv. */
+typedef union dtv
+{
+ size_t counter;
+ struct
+ {
+ void *val;
+ bool is_static;
+ } pointer;
+} dtv_t;
+
+
+#else /* __ASSEMBLER__ */
+# include <tcb-offsets.h>
+#endif /* __ASSEMBLER__ */
+
+/* We require TLS support in the tools. */
+#define HAVE_TLS_SUPPORT 1
+#define HAVE_TLS_MODEL_ATTRIBUTE 1
+#define HAVE___THREAD 1
+
+/* Signal that TLS support is available. */
+#define USE_TLS 1
+
+#ifndef __ASSEMBLER__
+
+/* Get system call information. */
+# include <sysdep.h>
+
+/* The TLS blocks start right after the TCB. */
+# define TLS_DTV_AT_TP 1
+
+/* Get the thread descriptor definition. */
+# include <../../descr.h>
+
+typedef struct
+{
+ dtv_t *dtv;
+ void *private;
+} tcbhead_t;
+
+/* This is the size of the initial TCB. */
+# define TLS_INIT_TCB_SIZE sizeof (tcbhead_t)
+
+/* Alignment requirements for the initial TCB. */
+# define TLS_INIT_TCB_ALIGN 16
+
+/* This is the size of the TCB. */
+# define TLS_TCB_SIZE sizeof (tcbhead_t)
+
+/* This is the size we need before TCB. */
+# define TLS_PRE_TCB_SIZE sizeof (struct pthread)
+
+/* Alignment requirements for the TCB. */
+# define TLS_TCB_ALIGN 16
+
+
+/* Install the dtv pointer. The pointer passed is to the element with
+ index -1 which contain the length. */
+# define INSTALL_DTV(tcbp, dtvp) \
+ (((tcbhead_t *) (tcbp))->dtv = (dtvp) + 1)
+
+/* Install new dtv for current thread. */
+# define INSTALL_NEW_DTV(dtv) \
+ ({ tcbhead_t *__tcbp; \
+ __asm__ __volatile__ ("rur %0, threadptr" : "=r" (__tcbp)); \
+ __tcbp->dtv = (dtv); }) \
+
+/* Return dtv of given thread descriptor. */
+# define GET_DTV(tcbp) \
+ (((tcbhead_t *) (tcbp))->dtv)
+
+/* Code to initially initialize the thread pointer. This might need
+ special attention since 'errno' is not yet available and if the
+ operation can cause a failure 'errno' must not be touched. */
+# define TLS_INIT_TP(tcbp, secondcall) \
+ ({ __asm__ __volatile__ ("wur %0, threadptr" : : "r" (tcbp)); 0; })
+
+/* Return the address of the dtv for the current thread. */
+# define THREAD_DTV() \
+ ({ tcbhead_t *__tcbp; \
+ __asm__ __volatile__ ("rur %0, threadptr" : "=r" (__tcbp)); \
+ __tcbp->dtv; })
+
+/* Return the thread descriptor for the current thread. */
+# define THREAD_SELF \
+ ({ struct pthread *__self; \
+ __asm__ ("rur %0, threadptr" : "=r" (__self)); \
+ __self - 1; })
+
+/* Magic for libthread_db to know how to do THREAD_SELF. */
+# define DB_THREAD_SELF \
+ CONST_THREAD_AREA (32, sizeof (struct pthread))
+
+/* Access to data in the thread descriptor is easy. */
+#define THREAD_GETMEM(descr, member) \
+ descr->member
+#define THREAD_GETMEM_NC(descr, member, idx) \
+ descr->member[idx]
+#define THREAD_SETMEM(descr, member, value) \
+ descr->member = (value)
+#define THREAD_SETMEM_NC(descr, member, idx, value) \
+ descr->member[idx] = (value)
+
+/* Get and set the global scope generation counter in struct pthread. */
+#define THREAD_GSCOPE_FLAG_UNUSED 0
+#define THREAD_GSCOPE_FLAG_USED 1
+#define THREAD_GSCOPE_FLAG_WAIT 2
+#define THREAD_GSCOPE_RESET_FLAG() \
+ do \
+ { int __res \
+ = atomic_exchange_rel (&THREAD_SELF->header.gscope_flag, \
+ THREAD_GSCOPE_FLAG_UNUSED); \
+ if (__res == THREAD_GSCOPE_FLAG_WAIT) \
+ lll_futex_wake (&THREAD_SELF->header.gscope_flag, 1, LLL_PRIVATE); \
+ } \
+ while (0)
+#define THREAD_GSCOPE_SET_FLAG() \
+ do \
+ { \
+ THREAD_SELF->header.gscope_flag = THREAD_GSCOPE_FLAG_USED; \
+ atomic_write_barrier (); \
+ } \
+ while (0)
+
+#define THREAD_GSCOPE_WAIT() \
+ GL(dl_wait_lookup_done) ()
+
+#endif /* __ASSEMBLER__ */
+
+#endif /* tls.h */
diff --git a/libpthread/nptl/sysdeps/xtensa/tlsdesc.sym b/libpthread/nptl/sysdeps/xtensa/tlsdesc.sym
new file mode 100644
index 000000000..b18bf5fb9
--- /dev/null
+++ b/libpthread/nptl/sysdeps/xtensa/tlsdesc.sym
@@ -0,0 +1,10 @@
+#include <stddef.h>
+#include <sysdep.h>
+#include <tls.h>
+#include <link.h>
+#include <dl-tls.h>
+
+TLSDESC_ARG offsetof(struct tlsdesc, argument)
+TLSDESC_GEN_COUNT offsetof(struct tlsdesc_dynamic_arg, gen_count)
+TLSDESC_MODID offsetof(struct tlsdesc_dynamic_arg, tlsinfo.ti_module)
+TLSDESC_MODOFF offsetof(struct tlsdesc_dynamic_arg, tlsinfo.ti_offset)