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-rw-r--r--libpthread/nptl/sysdeps/riscv32/Makefile.arch4
-rw-r--r--libpthread/nptl/sysdeps/riscv32/dl-tls.h34
-rw-r--r--libpthread/nptl/sysdeps/riscv32/libc-tls.c34
-rw-r--r--libpthread/nptl/sysdeps/riscv32/pthread_spin_lock.c65
-rw-r--r--libpthread/nptl/sysdeps/riscv32/pthread_spin_trylock.c26
-rw-r--r--libpthread/nptl/sysdeps/riscv32/pthreaddef.h33
-rw-r--r--libpthread/nptl/sysdeps/riscv32/tcb-offsets.sym7
-rw-r--r--libpthread/nptl/sysdeps/riscv32/tls.h170
8 files changed, 373 insertions, 0 deletions
diff --git a/libpthread/nptl/sysdeps/riscv32/Makefile.arch b/libpthread/nptl/sysdeps/riscv32/Makefile.arch
new file mode 100644
index 000000000..01fdac0b5
--- /dev/null
+++ b/libpthread/nptl/sysdeps/riscv32/Makefile.arch
@@ -0,0 +1,4 @@
+# Makefile for uClibc-ng NPTL
+# Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
+
+libc_arch_a_CSRC = libc-tls.c
diff --git a/libpthread/nptl/sysdeps/riscv32/dl-tls.h b/libpthread/nptl/sysdeps/riscv32/dl-tls.h
new file mode 100644
index 000000000..31991be0d
--- /dev/null
+++ b/libpthread/nptl/sysdeps/riscv32/dl-tls.h
@@ -0,0 +1,34 @@
+/* Copyright (C) 2005-2016 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.
+
+ 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/>. */
+
+/* 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;
+
+/* The thread pointer points to the first static TLS block. */
+#define TLS_TP_OFFSET 0
+
+/* Dynamic thread vector pointers point 0x800 past the start of each
+ TLS block. */
+#define TLS_DTV_OFFSET 0x800
+
+extern void *__tls_get_addr (tls_index *ti);
+
+#define GET_ADDR_OFFSET (ti->ti_offset + TLS_DTV_OFFSET)
+#define __TLS_GET_ADDR(__ti) (__tls_get_addr (__ti) - TLS_DTV_OFFSET)
diff --git a/libpthread/nptl/sysdeps/riscv32/libc-tls.c b/libpthread/nptl/sysdeps/riscv32/libc-tls.c
new file mode 100644
index 000000000..8c601c06d
--- /dev/null
+++ b/libpthread/nptl/sysdeps/riscv32/libc-tls.c
@@ -0,0 +1,34 @@
+/* Copyright (C) 2005-2016 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.
+
+ 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>
+
+/* On RISC-V 32, 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. */
+
+#if defined(USE_TLS) && USE_TLS
+
+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/riscv32/pthread_spin_lock.c b/libpthread/nptl/sysdeps/riscv32/pthread_spin_lock.c
new file mode 100644
index 000000000..cec3acbc6
--- /dev/null
+++ b/libpthread/nptl/sysdeps/riscv32/pthread_spin_lock.c
@@ -0,0 +1,65 @@
+/* pthread_spin_lock -- lock a spin lock. Generic version.
+ Copyright (C) 2012-2016 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.
+
+ 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 <atomic.h>
+#include "pthreadP.h"
+
+/* A machine-specific version can define SPIN_LOCK_READS_BETWEEN_CMPXCHG
+ to the number of plain reads that it's optimal to spin on between uses
+ of atomic_compare_and_exchange_val_acq. If spinning forever is optimal
+ then use -1. If no plain reads here would ever be optimal, use 0. */
+#define SPIN_LOCK_READS_BETWEEN_CMPXCHG 1000
+
+int
+pthread_spin_lock (pthread_spinlock_t *lock)
+{
+ /* atomic_exchange usually takes less instructions than
+ atomic_compare_and_exchange. On the other hand,
+ atomic_compare_and_exchange potentially generates less bus traffic
+ when the lock is locked.
+ We assume that the first try mostly will be successful, and we use
+ atomic_exchange. For the subsequent tries we use
+ atomic_compare_and_exchange. */
+ if (atomic_exchange_acq (lock, 1) == 0)
+ return 0;
+
+ do
+ {
+ /* The lock is contended and we need to wait. Going straight back
+ to cmpxchg is not a good idea on many targets as that will force
+ expensive memory synchronizations among processors and penalize other
+ running threads.
+ On the other hand, we do want to update memory state on the local core
+ once in a while to avoid spinning indefinitely until some event that
+ will happen to update local memory as a side-effect. */
+ if (SPIN_LOCK_READS_BETWEEN_CMPXCHG >= 0)
+ {
+ int wait = SPIN_LOCK_READS_BETWEEN_CMPXCHG;
+
+ while (*lock != 0 && wait > 0)
+ --wait;
+ }
+ else
+ {
+ while (*lock != 0)
+ ;
+ }
+ }
+ while (atomic_compare_and_exchange_val_acq (lock, 1, 0) != 0);
+
+ return 0;
+}
diff --git a/libpthread/nptl/sysdeps/riscv32/pthread_spin_trylock.c b/libpthread/nptl/sysdeps/riscv32/pthread_spin_trylock.c
new file mode 100644
index 000000000..4e9aa64d3
--- /dev/null
+++ b/libpthread/nptl/sysdeps/riscv32/pthread_spin_trylock.c
@@ -0,0 +1,26 @@
+/* pthread_spin_trylock -- trylock a spin lock. Generic version.
+ Copyright (C) 2012-2016 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.
+
+ 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 <atomic.h>
+#include "pthreadP.h"
+
+int
+pthread_spin_trylock (pthread_spinlock_t *lock)
+{
+ return atomic_exchange_acq (lock, 1) ? EBUSY : 0;
+}
diff --git a/libpthread/nptl/sysdeps/riscv32/pthreaddef.h b/libpthread/nptl/sysdeps/riscv32/pthreaddef.h
new file mode 100644
index 000000000..5a929bc77
--- /dev/null
+++ b/libpthread/nptl/sysdeps/riscv32/pthreaddef.h
@@ -0,0 +1,33 @@
+/* Copyright (C) 2002-2012 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.
+
+ 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/>. */
+
+/* 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/riscv32/tcb-offsets.sym b/libpthread/nptl/sysdeps/riscv32/tcb-offsets.sym
new file mode 100644
index 000000000..fe6856c5d
--- /dev/null
+++ b/libpthread/nptl/sysdeps/riscv32/tcb-offsets.sym
@@ -0,0 +1,7 @@
+#include <sysdep.h>
+#include <tls.h>
+
+#define thread_offsetof(mem) (long)(offsetof (struct pthread, mem) - TLS_TCB_OFFSET - TLS_PRE_TCB_SIZE)
+
+MULTIPLE_THREADS_OFFSET thread_offsetof (header.multiple_threads)
+
diff --git a/libpthread/nptl/sysdeps/riscv32/tls.h b/libpthread/nptl/sysdeps/riscv32/tls.h
new file mode 100644
index 000000000..8ef9f3511
--- /dev/null
+++ b/libpthread/nptl/sysdeps/riscv32/tls.h
@@ -0,0 +1,170 @@
+/* Definition for thread-local data handling. NPTL/RISCV32 version.
+ Copyright (C) 2005, 2007, 2011 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.
+
+ 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 _TLS_H
+#define _TLS_H 1
+
+#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__
+
+register void *__thread_self __asm__("tp");
+# define READ_THREAD_POINTER() ({ __thread_self; })
+
+/* Get system call information. */
+# include <sysdep.h>
+
+/* The TP points to the start of the TLS block. */
+# 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. Because our TCB is before the thread
+ pointer, we don't need this. */
+# define TLS_INIT_TCB_SIZE 0
+# define TLS_INIT_TCB_ALIGN __alignof__ (struct pthread)
+
+/* This is the size of the TCB. Because our TCB is before the thread
+ pointer, we don't need this. */
+# define TLS_TCB_SIZE 0
+# define TLS_TCB_ALIGN __alignof__ (struct pthread)
+
+/* This is the size we need before TCB - actually, it includes the TCB. */
+# define TLS_PRE_TCB_SIZE \
+ (sizeof (struct pthread) \
+ + ((sizeof (tcbhead_t) + __alignof (struct pthread) - 1) \
+ & ~(__alignof (struct pthread) - 1)))
+
+/* The thread pointer tp points to the end of the TCB.
+ The pthread_descr structure is immediately in front of the TCB. */
+# define TLS_TCB_OFFSET 0
+
+/* 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))[-1].dtv = (dtvp) + 1)
+
+/* Install new dtv for current thread */
+# define INSTALL_NEW_DTV(dtv) \
+ (THREAD_DTV() = (dtv))
+
+/* Return dtv of given thread descriptor. */
+# define GET_DTV(tcbp) \
+ (((tcbhead_t *) (tcbp))[-1].dtv)
+
+/* Code to initially initialize the thread pointer.
+ *
+ * Set TP to the address _after_ tcbhead_t. This will allow us
+ * to change the size of tcbhead_t without having to re-link everything.
+ *
+ * secondcall has something to do with USE__THREAD,
+ * seems to always be 0 so we don't care about it.
+ *
+ * This has to return NULL on success (or a string with the failure text).
+ * It's hard to fail this, so return NULL always.
+ */
+# define TLS_INIT_TP(tcbp, secondcall) \
+ ({ __thread_self = (char*)tcbp + TLS_TCB_OFFSET; NULL; })
+
+/* Return the address of the dtv for the current thread. */
+# define THREAD_DTV() \
+ (((tcbhead_t *) (READ_THREAD_POINTER () - TLS_TCB_OFFSET))[-1].dtv)
+
+/* Return the thread descriptor for the current thread. */
+# define THREAD_SELF \
+ ((struct pthread *) (READ_THREAD_POINTER () \
+ - TLS_TCB_OFFSET - TLS_PRE_TCB_SIZE))
+
+/* Informs libthread_db that the thread pointer is register 4, which is used
+ * to know how to do THREAD_SELF. */
+# define DB_THREAD_SELF \
+ REGISTER (64, 64, 4 * 8, - TLS_TCB_OFFSET - TLS_PRE_TCB_SIZE)
+
+/* 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)
+
+/* l_tls_offset == 0 is perfectly valid, so we have to use some different
+ value to mean unset l_tls_offset. */
+# define NO_TLS_OFFSET -1
+
+/* 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 */
+
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-16 00:29:25 +0000