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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2007 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#include <sys/asm_linkage.h>
#include <sys/asm_misc.h>
#include <sys/regset.h>
#include <sys/panic.h>
#include <sys/ontrap.h>
#include <sys/privregs.h>
#include <sys/segments.h>
#include <sys/trap.h>
#if defined(__lint)
#include <sys/types.h>
#include <sys/systm.h>
#include <sys/thread.h>
#include <sys/archsystm.h>
#include <sys/byteorder.h>
#include <sys/dtrace.h>
#include <sys/x86_archext.h>
#else /* __lint */
#include "assym.h"
#endif /* __lint */
#if defined(__lint)
/*ARGSUSED*/
void
rd_idtr(desctbr_t *idtr)
{}
/*ARGSUSED*/
void
wr_idtr(desctbr_t *idtr)
{}
#else /* __lint */
#if defined(__amd64)
ENTRY_NP(rd_idtr)
sidt (%rdi)
ret
SET_SIZE(rd_idtr)
ENTRY_NP(wr_idtr)
lidt (%rdi)
ret
SET_SIZE(wr_idtr)
#elif defined(__i386)
ENTRY_NP(rd_idtr)
pushl %ebp
movl %esp, %ebp
movl 8(%ebp), %edx
sidt (%edx)
leave
ret
SET_SIZE(rd_idtr)
ENTRY_NP(wr_idtr)
pushl %ebp
movl %esp, %ebp
movl 8(%ebp), %edx
lidt (%edx)
leave
ret
SET_SIZE(wr_idtr)
#endif /* __i386 */
#endif /* __lint */
#if defined(__lint)
/*ARGSUSED*/
void
rd_gdtr(desctbr_t *gdtr)
{}
/*ARGSUSED*/
void
wr_gdtr(desctbr_t *gdtr)
{}
#else /* __lint */
#if defined(__amd64)
ENTRY_NP(rd_gdtr)
pushq %rbp
movq %rsp, %rbp
sgdt (%rdi)
leave
ret
SET_SIZE(rd_gdtr)
ENTRY_NP(wr_gdtr)
pushq %rbp
movq %rsp, %rbp
lgdt (%rdi)
jmp 1f
nop
1:
leave
ret
SET_SIZE(wr_gdtr)
#elif defined(__i386)
ENTRY_NP(rd_gdtr)
pushl %ebp
movl %esp, %ebp
movl 8(%ebp), %edx
sgdt (%edx)
leave
ret
SET_SIZE(rd_gdtr)
ENTRY_NP(wr_gdtr)
pushl %ebp
movl %esp, %ebp
movl 8(%ebp), %edx
lgdt (%edx)
jmp 1f
nop
1:
leave
ret
SET_SIZE(wr_gdtr)
#endif /* __i386 */
#endif /* __lint */
#if defined(__amd64)
#if defined(__lint)
/*ARGSUSED*/
void
load_segment_registers(selector_t cs, selector_t fs, selector_t gs,
selector_t ss)
{}
selector_t
get_cs_register()
{ return (0); }
#else /* __lint */
/*
* loads zero selector for ds and es.
*/
ENTRY_NP(load_segment_registers)
pushq %rbp
movq %rsp, %rbp
pushq %rdi
pushq $.newcs
lretq
.newcs:
/*
* zero %ds and %es - they're ignored anyway
*/
xorl %eax, %eax
movw %ax, %ds
movw %ax, %es
movl %esi, %eax
movw %ax, %fs
movl %edx, %eax
movw %ax, %gs
movl %ecx, %eax
movw %ax, %ss
leave
ret
SET_SIZE(load_segment_registers)
ENTRY_NP(get_cs_register)
movq %cs, %rax
ret
SET_SIZE(get_cs_register)
#endif /* __lint */
#elif defined(__i386)
#if defined(__lint)
/*ARGSUSED*/
void
load_segment_registers(
selector_t cs, selector_t ds, selector_t es,
selector_t fs, selector_t gs, selector_t ss)
{}
selector_t
get_cs_register()
{ return ((selector_t) 0); }
#else /* __lint */
ENTRY_NP(load_segment_registers)
pushl %ebp
movl %esp, %ebp
pushl 0x8(%ebp)
pushl $.newcs
lret
.newcs:
movw 0xc(%ebp), %ax
movw %ax, %ds
movw 0x10(%ebp), %ax
movw %ax, %es
movw 0x14(%ebp), %ax
movw %ax, %fs
movw 0x18(%ebp), %ax
movw %ax, %gs
movw 0x1c(%ebp), %ax
movw %ax, %ss
leave
ret
SET_SIZE(load_segment_registers)
ENTRY_NP(get_cs_register)
movl $0, %eax
movw %cs, %ax
ret
SET_SIZE(get_cs_register)
#endif /* __lint */
#endif /* __i386 */
#if defined(__lint)
/*ARGSUSED*/
void
wr_ldtr(selector_t ldtsel)
{}
selector_t
rd_ldtr(void)
{ return (0); }
#else /* __lint */
#if defined(__amd64)
ENTRY_NP(wr_ldtr)
movq %rdi, %rax
lldt %ax
ret
SET_SIZE(wr_ldtr)
ENTRY_NP(rd_ldtr)
xorl %eax, %eax
sldt %ax
ret
SET_SIZE(rd_ldtr)
#elif defined(__i386)
ENTRY_NP(wr_ldtr)
movw 4(%esp), %ax
lldt %ax
ret
SET_SIZE(wr_ldtr)
ENTRY_NP(rd_ldtr)
xorl %eax, %eax
sldt %ax
ret
SET_SIZE(rd_ldtr)
#endif /* __i386 */
#endif /* __lint */
#if defined(__lint)
/*ARGSUSED*/
void
wr_tsr(selector_t tsssel)
{}
#else /* __lint */
#if defined(__amd64)
ENTRY_NP(wr_tsr)
movq %rdi, %rax
ltr %ax
ret
SET_SIZE(wr_tsr)
#elif defined(__i386)
ENTRY_NP(wr_tsr)
movw 4(%esp), %ax
ltr %ax
ret
SET_SIZE(wr_tsr)
#endif /* __i386 */
#endif /* __lint */
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