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+/* Machine-dependent pthreads configuration and inline functions.
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+ Sparc v9 version.
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+ Copyright (C) 1997-2002, 2003 Free Software Foundation, Inc.
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+ This file is part of the GNU C Library.
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+ Contributed by Richard Henderson <rth@tamu.edu>.
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+
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+ The GNU C Library is free software; you can redistribute it and/or
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+ modify it under the terms of the GNU Lesser General Public License as
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+ published by the Free Software Foundation; either version 2.1 of the
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+ License, or (at your option) any later version.
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+
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+ The GNU C Library is distributed in the hope that it will be useful,
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+ but WITHOUT ANY WARRANTY; without even the implied warranty of
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+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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+ Lesser General Public License for more details.
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+
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+ You should have received a copy of the GNU Lesser General Public
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+ License along with the GNU C Library; see the file COPYING.LIB. If
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+ not, write to the Free Software Foundation, Inc.,
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+ 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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+
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+#ifndef _PT_MACHINE_H
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+#define _PT_MACHINE_H 1
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+
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+#ifndef PT_EI
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+# define PT_EI extern inline __attribute__ ((always_inline))
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+#endif
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+
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+extern long int testandset (int *spinlock);
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+extern int __compare_and_swap (long int *p, long int oldval, long int newval);
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+
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+/* Spinlock implementation; required. */
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+PT_EI long int
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+testandset (int *spinlock)
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+{
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+ int ret;
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+
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+ __asm__ __volatile__("ldstub %1,%0"
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+ : "=r" (ret), "=m" (*spinlock) : "m" (*spinlock));
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+
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+ return ret;
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+}
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+
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+
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+/* Memory barrier; default is to do nothing */
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+#define MEMORY_BARRIER() \
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+ __asm__ __volatile__("membar #LoadLoad | #LoadStore | #StoreLoad | #StoreStore" : : : "memory")
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+/* Read barrier. */
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+#define READ_MEMORY_BARRIER() \
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+ __asm__ __volatile__("membar #LoadLoad | #LoadStore" : : : "memory")
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+/* Write barrier. */
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+#define WRITE_MEMORY_BARRIER() \
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+ __asm__ __volatile__("membar #StoreLoad | #StoreStore" : : : "memory")
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+
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+
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+/* Get some notion of the current stack. Need not be exactly the top
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+ of the stack, just something somewhere in the current frame. */
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+#define CURRENT_STACK_FRAME (stack_pointer + (2 * 128))
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+register char *stack_pointer __asm__ ("%sp");
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+
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+
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+/* Registers %g6 and %g7 are reserved by the ABI for "system use". The
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+ TLS ABI specifies %g7 as the thread pointer. */
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+struct _pthread_descr_struct;
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+register struct _pthread_descr_struct *__thread_self __asm__ ("%g7");
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+
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+/* Return the thread descriptor for the current thread. */
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+#define THREAD_SELF __thread_self
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+
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+/* Initialize the thread-unique value. */
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+#define INIT_THREAD_SELF(descr, nr) (__thread_self = (descr))
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+
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+
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+/* Compare-and-swap for semaphores. */
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+
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+#define HAS_COMPARE_AND_SWAP
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+PT_EI int
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+__compare_and_swap (long int *p, long int oldval, long int newval)
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+{
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+ long int readval;
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+
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+ __asm__ __volatile__ ("casx [%4], %2, %0"
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+ : "=r"(readval), "=m"(*p)
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+ : "r"(oldval), "m"(*p), "r"(p), "0"(newval));
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+ MEMORY_BARRIER();
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+ return readval == oldval;
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+}
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+
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+/* Access to data in the thread descriptor is easy. */
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+#define THREAD_GETMEM(descr, member) \
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+ ((void) sizeof (descr), THREAD_SELF->member)
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+#define THREAD_GETMEM_NC(descr, member) \
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+ ((void) sizeof (descr), THREAD_SELF->member)
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+#define THREAD_SETMEM(descr, member, value) \
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+ ((void) sizeof (descr), THREAD_SELF->member = (value))
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+#define THREAD_SETMEM_NC(descr, member, value) \
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+ ((void) sizeof (descr), THREAD_SELF->member = (value))
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+
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+/* We want the OS to assign stack addresses. */
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+#define FLOATING_STACKS 1
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+
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+/* Maximum size of the stack if the rlimit is unlimited. */
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+#define ARCH_STACK_MAX_SIZE 32*1024*1024
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+
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+#endif /* pt-machine.h */
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Mike Frysinger