diff options
author | David Leonard <d@cvs.openbsd.org> | 1998-08-28 01:54:59 +0000 |
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committer | David Leonard <d@cvs.openbsd.org> | 1998-08-28 01:54:59 +0000 |
commit | 21f1fbf6218d3789e19a69b5f391467dfd213cd6 (patch) | |
tree | 7507597f666a51325a688de49871bf60b78daa60 /lib/libpthread | |
parent | 1f055c83c7bf42b2a4d6dc2ca4c5eb4627f610bc (diff) |
somehow i missed this directory..
Diffstat (limited to 'lib/libpthread')
-rw-r--r-- | lib/libpthread/arch/alpha/_atomic_lock.S | 58 | ||||
-rw-r--r-- | lib/libpthread/arch/alpha/uthread_machdep.h | 36 | ||||
-rw-r--r-- | lib/libpthread/arch/i386/_atomic_lock.S | 46 | ||||
-rw-r--r-- | lib/libpthread/arch/i386/uthread_machdep.h | 35 |
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]; +}; + |