diff options
Diffstat (limited to 'lib/libpthread/arch/i386/include/ksd.h')
| -rw-r--r-- | lib/libpthread/arch/i386/include/ksd.h | 144 |
1 files changed, 144 insertions, 0 deletions
diff --git a/lib/libpthread/arch/i386/include/ksd.h b/lib/libpthread/arch/i386/include/ksd.h new file mode 100644 index 0000000..bdbb83b --- /dev/null +++ b/lib/libpthread/arch/i386/include/ksd.h @@ -0,0 +1,144 @@ +/*- + * Copyright (C) 2003 David Xu <davidxu@freebsd.org> + * Copyright (c) 2001 Daniel Eischen <deischen@freebsd.org> + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 THE AUTHOR 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. + */ + +/* + * $FreeBSD$ + */ + +#ifndef _KSD_H_ +#define _KSD_H_ + +#include <sys/types.h> + +struct pthread; +struct __ucontext; +struct kse; + +/* + * KSE Specific Data. + */ +struct ksd { + int ldt; +#define KSDF_INITIALIZED 0x01 + long flags; + void *base; + long size; +}; + +/* + * Evaluates to the byte offset of the per-kse variable name. + */ +#define __ksd_offset(name) __offsetof(struct kse, name) + +/* + * Evaluates to the type of the per-kse variable name. + */ +#define __ksd_type(name) __typeof(((struct kse *)0)->name) + + +/* + * Evaluates to the value of the per-kse variable name. + */ +#define __KSD_GET_PTR(name) ({ \ + void *__result; \ + \ + u_int __i; \ + __asm __volatile("movl %%gs:%1, %0" \ + : "=r" (__i) \ + : "m" (*(u_int *)(__ksd_offset(name)))); \ + __result = (void *)__i; \ + \ + __result; \ +}) + +/* + * Evaluates to the value of the per-kse variable name. + */ +#define __KSD_GET32(name) ({ \ + __ksd_type(name) __result; \ + \ + u_int __i; \ + __asm __volatile("movl %%gs:%1, %0" \ + : "=r" (__i) \ + : "m" (*(u_int *)(__ksd_offset(name)))); \ + __result = *(__ksd_type(name) *)&__i; \ + \ + __result; \ +}) + +/* + * Sets the value of the per-cpu variable name to value val. + */ +#define __KSD_SET32(name, val) ({ \ + __ksd_type(name) __val = (val); \ + \ + u_int __i; \ + __i = *(u_int *)&__val; \ + __asm __volatile("movl %1,%%gs:%0" \ + : "=m" (*(u_int *)(__ksd_offset(name))) \ + : "r" (__i)); \ +}) + +static __inline u_long +__ksd_readandclear32(volatile u_long *addr) +{ + u_long result; + + __asm __volatile ( + " xorl %0, %0;" + " xchgl %%gs:%1, %0;" + "# __ksd_readandclear32" + : "=&r" (result) + : "m" (*addr)); + return (result); +} + +#define __KSD_READANDCLEAR32(name) ({ \ + __ksd_type(name) __result; \ + \ + __result = (__ksd_type(name)) \ + __ksd_readandclear32((u_long *)__ksd_offset(name)); \ + __result; \ +}) + +/* + * All members of struct kse are prefixed with k_. + */ +#define KSD_GET_PTR(member) __KSD_GET_PTR(k_ ## member) +#define KSD_SET_PTR(member, val) __KSD_SET32(k_ ## member, val) +#define KSD_READANDCLEAR_PTR(member) __KSD_READANDCLEAR32(k_ ## member) + +#define _ksd_curkse ((struct kse *)KSD_GET_PTR(mbx.km_udata)) +#define _ksd_curthread KSD_GET_PTR(curthread) +#define _ksd_set_tmbx(value) KSD_SET_PTR(mbx.km_curthread, (void *)value) +#define _ksd_readandclear_tmbx KSD_READANDCLEAR_PTR(mbx.km_curthread) + +int _ksd_create(struct ksd *ksd, void *base, int size); +void _ksd_destroy(struct ksd *ksd); +int _ksd_getprivate(struct ksd *ksd, void **base, int *size); +int _ksd_setprivate(struct ksd *ksd); +#endif |
