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authorDavid Leonard <d@cvs.openbsd.org>1998-08-28 01:54:59 +0000
committerDavid Leonard <d@cvs.openbsd.org>1998-08-28 01:54:59 +0000
commit21f1fbf6218d3789e19a69b5f391467dfd213cd6 (patch)
tree7507597f666a51325a688de49871bf60b78daa60 /lib/libpthread
parent1f055c83c7bf42b2a4d6dc2ca4c5eb4627f610bc (diff)
somehow i missed this directory..
Diffstat (limited to 'lib/libpthread')
-rw-r--r--lib/libpthread/arch/alpha/_atomic_lock.S58
-rw-r--r--lib/libpthread/arch/alpha/uthread_machdep.h36
-rw-r--r--lib/libpthread/arch/i386/_atomic_lock.S46
-rw-r--r--lib/libpthread/arch/i386/uthread_machdep.h35
4 files changed, 175 insertions, 0 deletions
diff --git a/lib/libpthread/arch/alpha/_atomic_lock.S b/lib/libpthread/arch/alpha/_atomic_lock.S
new file mode 100644
index 00000000000..ba0022e4a4d
--- /dev/null
+++ b/lib/libpthread/arch/alpha/_atomic_lock.S
@@ -0,0 +1,58 @@
+/*
+ * Copyright (c) 1998 John Birrell <jb@cimlogic.com.au>.
+ * All rights reserved.
+ * copyright Douglas Santry 1996
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the above copyright is retained
+ * in the source form.
+ *
+ * THIS SOFTWARE IS PROVIDED BY Douglas Santry AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL Douglas Santry OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * $Id: _atomic_lock.S,v 1.1 1998/08/28 01:54:57 d Exp $
+ * $OpenBSD: _atomic_lock.S,v 1.1 1998/08/28 01:54:57 d Exp $
+ *
+ */
+
+#include "SYS.h"
+
+/*
+ * Atomicly lock a location with an identifier provided the location
+ * is not currently locked.
+ *
+ * long _atomic_lock(long *);
+ * v0 will contain the return value (zero if lock obtained).
+ */
+LEAF(_atomic_lock,0)
+ LDGP(pv)
+
+ /* Get the existing lock value and lock memory: */
+ ldq_l v0, 0(a0)
+
+ /* Branch if already locked: */
+ bne v0, already_locked
+
+ /* Not locked, so store 1: */
+ mov 1, t0
+ stq_c t0, 0(a0)
+
+ /* Obtained the lock: */
+ br done
+
+already_locked:
+ /* Already locked so put the value back and unlock memory: */
+ stq_c v0, 0(a0)
+
+done:
+ RET
+END(_atomic_lock)
diff --git a/lib/libpthread/arch/alpha/uthread_machdep.h b/lib/libpthread/arch/alpha/uthread_machdep.h
new file mode 100644
index 00000000000..3c8ea0489b1
--- /dev/null
+++ b/lib/libpthread/arch/alpha/uthread_machdep.h
@@ -0,0 +1,36 @@
+/*
+ * OpenBSD/alpha machine-dependent thread macros
+ *
+ * $OpenBSD: uthread_machdep.h,v 1.1 1998/08/28 01:54:57 d Exp $
+ */
+
+/* save the floating point state of a thread */
+#define _thread_machdep_save_float_state(thr) \
+ { \
+ char *fdata = (char*)((thr)->_machdep.saved_fp); \
+ __asm__("fsave %0"::"m" (*fdata)); \
+ }
+
+/* restore the floating point state of a thread */
+#define _thread_machdep_restore_float_state(thr) \
+ { \
+ char *fdata = (char*)((thr)->_machdep.saved_fp); \
+ __asm__("frstor %0"::"m" (*fdata)); \
+ }
+
+/* initialise the jmpbuf stack frame so it continues from entry */
+#define _thread_machdep_thread_create(thr, entry, pattr) \
+ { \
+ /* entry */ \
+ (thr)->saved_jmp_buf[2] = (long) entry; \
+ (thr)->saved_jmp_buf[4+R_RA] = 0; \
+ (thr)->saved_jmp_buf[4+R_T12] = (long) entry; \
+ /* stack */ \
+ (thr)->saved_jmp_buf[4 + R_SP] = (long) (thr)->stack \
+ + (pattr)->stacksize_attr \
+ - sizeof(double); \
+ }
+
+struct _machdep_struct {
+ char saved_fp[108];
+};
diff --git a/lib/libpthread/arch/i386/_atomic_lock.S b/lib/libpthread/arch/i386/_atomic_lock.S
new file mode 100644
index 00000000000..fbdc508eb52
--- /dev/null
+++ b/lib/libpthread/arch/i386/_atomic_lock.S
@@ -0,0 +1,46 @@
+/*
+ * Copyright (c) 1995-1998 John Birrell <jb@cimlogic.com.au>.
+ * All rights reserved.
+ * copyright Douglas Santry 1996
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the above copyright is retained
+ * in the source form.
+ *
+ * THIS SOFTWARE IS PROVIDED BY Douglas Santry AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL Douglas Santry OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * $Id: _atomic_lock.S,v 1.1 1998/08/28 01:54:58 d Exp $
+ * $OpenBSD: _atomic_lock.S,v 1.1 1998/08/28 01:54:58 d Exp $
+ *
+ */
+
+#if defined(LIBC_RCS) && !defined(lint)
+ .text
+ .asciz "$Id: _atomic_lock.S,v 1.1 1998/08/28 01:54:58 d Exp $"
+#endif /* LIBC_RCS and not lint */
+
+#include "DEFS.h"
+
+/*
+ * Atomicly lock a location with an identifier provided the location
+ * is not currently locked.
+ *
+ * long _atomic_lock(long *);
+ * eax will contain the return value (zero if lock obtained).
+ */
+ENTRY(_atomic_lock)
+ movl 4(%esp), %ecx
+ movl $1, %eax
+ xchg %eax, (%ecx)
+ ret
+
diff --git a/lib/libpthread/arch/i386/uthread_machdep.h b/lib/libpthread/arch/i386/uthread_machdep.h
new file mode 100644
index 00000000000..2a296d3ae25
--- /dev/null
+++ b/lib/libpthread/arch/i386/uthread_machdep.h
@@ -0,0 +1,35 @@
+/*
+ * OpenBSD/i386 machine-dependent thread macros
+ *
+ * $OpenBSD: uthread_machdep.h,v 1.1 1998/08/28 01:54:58 d Exp $
+ */
+
+/* save the floating point state of a thread */
+#define _thread_machdep_save_float_state(thr) \
+ { \
+ char *fdata = (char*)((thr)->_machdep.saved_fp); \
+ __asm__("fsave %0"::"m" (*fdata)); \
+ }
+
+/* restore the floating point state of a thread */
+#define _thread_machdep_restore_float_state(thr) \
+ { \
+ char *fdata = (char*)((thr)->_machdep.saved_fp); \
+ __asm__("frstor %0"::"m" (*fdata)); \
+ }
+
+/* initialise the jmpbuf stack frame so it continues from entry */
+#define _thread_machdep_thread_create(thr, entry, pattr) \
+ { \
+ /* entry */ \
+ (thr)->saved_jmp_buf[0] = (long) entry; \
+ /* stack */ \
+ (thr)->saved_jmp_buf[2] = (long) (thr)->stack \
+ + (pattr)->stacksize_attr \
+ - sizeof(double); \
+ }
+
+struct _machdep_struct {
+ char saved_fp[108];
+};
+