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authorEric Andersen <andersen@codepoet.org>2002-03-01 21:09:56 +0000
committerEric Andersen <andersen@codepoet.org>2002-03-01 21:09:56 +0000
commit3fc6ba17b7a9919dd01a1c47853a4944fc990079 (patch)
treede3fd1bbbcae1ca3ed9238bcb82b1900d45fc714 /libpthread/linuxthreads/sysdeps/sh/pt-machine.h
parent9cee42f10dbc5b33866ff137b926a74abd7c1a5b (diff)
Patch from M. R. Brown <mrbrown@0xd6.org> to fix pthread support
for SH, and fix vfork
Diffstat (limited to 'libpthread/linuxthreads/sysdeps/sh/pt-machine.h')
-rw-r--r--libpthread/linuxthreads/sysdeps/sh/pt-machine.h56
1 files changed, 56 insertions, 0 deletions
diff --git a/libpthread/linuxthreads/sysdeps/sh/pt-machine.h b/libpthread/linuxthreads/sysdeps/sh/pt-machine.h
new file mode 100644
index 000000000..7287dc936
--- /dev/null
+++ b/libpthread/linuxthreads/sysdeps/sh/pt-machine.h
@@ -0,0 +1,56 @@
+/* Machine-dependent pthreads configuration and inline functions.
+ SuperH version.
+ Copyright (C) 1999, 2000, 2001 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by Niibe Yutaka <gniibe@m17n.org>.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ 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
+ Library General Public License for more details.
+
+ 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. */
+
+#ifndef PT_EI
+# define PT_EI extern inline
+#endif
+
+/* Spinlock implementation; required. */
+PT_EI long int
+testandset (int *spinlock)
+{
+ int ret;
+
+ __asm__ __volatile__(
+ "tas.b @%1\n\t"
+ "movt %0"
+ : "=r" (ret)
+ : "r" (spinlock)
+ : "memory", "cc");
+
+ return (ret == 0);
+}
+
+
+/* Get some notion of the current stack. Need not be exactly the top
+ of the stack, just something somewhere in the current frame. */
+#define CURRENT_STACK_FRAME stack_pointer
+register char * stack_pointer __asm__ ("r15");
+
+/* Return the thread descriptor for the current thread. */
+struct _pthread_descr_struct;
+#define THREAD_SELF \
+ ({ struct _pthread_descr_struct *self; \
+ __asm__("stc gbr,%0" : "=r" (self)); self;})
+
+/* Initialize the thread-unique value. */
+#define INIT_THREAD_SELF(descr, nr) \
+ ({ __asm__("ldc %0,gbr" : : "r" (descr));})