hypersubr.s revision 843e19887f64dde75055cf8842fc4db2171eff45
/*
* 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.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
#include <sys/asm_linkage.h>
#include <sys/hypervisor.h>
/*
* XXPV grr - assembler can't deal with an instruction in a quoted string
*/
#undef TRAP_INSTR /* cause it's currently "int $0x82" */
#if defined(__amd64)
#define TRAP_INSTR syscall
#elif defined(__i386)
#define TRAP_INSTR int $0x82
#endif
/*
* Hypervisor "system calls"
*
* i386
* %eax == call number
* args in registers (%ebx, %ecx, %edx, %esi, %edi)
*
* amd64
* %rax == call number
* args in registers (%rdi, %rsi, %rdx, %r10, %r8, %r9)
*
* Note that for amd64 we use %r10 instead of %rcx for passing 4th argument
* as in C calling convention since the "syscall" instruction clobbers %rcx.
*
* (These calls can be done more efficiently as gcc-style inlines, but
* for simplicity and help with initial debugging, we use these primitives
* to build the hypervisor calls up from C wrappers.)
*/
#if defined(__lint)
/*ARGSUSED*/
long
__hypercall0(int callnum)
{ return (0); }
/*ARGSUSED*/
long
__hypercall1(int callnum, ulong_t a1)
{ return (0); }
/*ARGSUSED*/
long
__hypercall2(int callnum, ulong_t a1, ulong_t a2)
{ return (0); }
/*ARGSUSED*/
long
__hypercall3(int callnum, ulong_t a1, ulong_t a2, ulong_t a3)
{ return (0); }
/*ARGSUSED*/
long
__hypercall4(int callnum, ulong_t a1, ulong_t a2, ulong_t a3, ulong_t a4)
{ return (0); }
/*ARGSUSED*/
long
__hypercall5(int callnum,
ulong_t a1, ulong_t a2, ulong_t a3, ulong_t a4, ulong_t a5)
{ return (0); }
/*ARGSUSED*/
int
__hypercall0_int(int callnum)
{ return (0); }
/*ARGSUSED*/
int
__hypercall1_int(int callnum, ulong_t a1)
{ return (0); }
/*ARGSUSED*/
int
__hypercall2_int(int callnum, ulong_t a1, ulong_t a2)
{ return (0); }
/*ARGSUSED*/
int
__hypercall3_int(int callnum, ulong_t a1, ulong_t a2, ulong_t a3)
{ return (0); }
/*ARGSUSED*/
int
__hypercall4_int(int callnum, ulong_t a1, ulong_t a2, ulong_t a3, ulong_t a4)
{ return (0); }
/*ARGSUSED*/
int
__hypercall5_int(int callnum,
ulong_t a1, ulong_t a2, ulong_t a3, ulong_t a4, ulong_t a5)
{ return (0); }
#else /* __lint */
#if defined(__amd64)
ENTRY_NP(__hypercall0)
ALTENTRY(__hypercall0_int)
movl %edi, %eax
TRAP_INSTR
ret
SET_SIZE(__hypercall0)
ENTRY_NP(__hypercall1)
ALTENTRY(__hypercall1_int)
movl %edi, %eax
movq %rsi, %rdi /* arg 1 */
TRAP_INSTR
ret
SET_SIZE(__hypercall1)
ENTRY_NP(__hypercall2)
ALTENTRY(__hypercall2_int)
movl %edi, %eax
movq %rsi, %rdi /* arg 1 */
movq %rdx, %rsi /* arg 2 */
TRAP_INSTR
ret
SET_SIZE(__hypercall2)
ENTRY_NP(__hypercall3)
ALTENTRY(__hypercall3_int)
movl %edi, %eax
movq %rsi, %rdi /* arg 1 */
movq %rdx, %rsi /* arg 2 */
movq %rcx, %rdx /* arg 3 */
TRAP_INSTR
ret
SET_SIZE(__hypercall3)
ENTRY_NP(__hypercall4)
ALTENTRY(__hypercall4_int)
movl %edi, %eax
movq %rsi, %rdi /* arg 1 */
movq %rdx, %rsi /* arg 2 */
movq %rcx, %rdx /* arg 3 */
movq %r8, %r10 /* r10 = 4th arg */
TRAP_INSTR
ret
SET_SIZE(__hypercall4)
ENTRY_NP(__hypercall5)
ALTENTRY(__hypercall5_int)
movl %edi, %eax
movq %rsi, %rdi /* arg 1 */
movq %rdx, %rsi /* arg 2 */
movq %rcx, %rdx /* arg 3 */
movq %r8, %r10 /* r10 = 4th arg */
movq %r9, %r8 /* arg 5 */
TRAP_INSTR
ret
SET_SIZE(__hypercall5)
#elif defined(__i386)
ENTRY_NP(__hypercall0)
ALTENTRY(__hypercall0_int)
movl 4(%esp), %eax
TRAP_INSTR
ret
SET_SIZE(__hypercall0)
ENTRY_NP(__hypercall1)
ALTENTRY(__hypercall1_int)
pushl %ebx
movl 8(%esp), %eax
movl 12(%esp), %ebx
TRAP_INSTR
popl %ebx
ret
SET_SIZE(__hypercall1)
ENTRY_NP(__hypercall2)
ALTENTRY(__hypercall2_int)
pushl %ebx
movl 8(%esp), %eax
movl 12(%esp), %ebx
movl 16(%esp), %ecx
TRAP_INSTR
popl %ebx
ret
SET_SIZE(__hypercall2)
ENTRY_NP(__hypercall3)
ALTENTRY(__hypercall3_int)
pushl %ebx
movl 8(%esp), %eax
movl 12(%esp), %ebx
movl 16(%esp), %ecx
movl 20(%esp), %edx
TRAP_INSTR
popl %ebx
ret
SET_SIZE(__hypercall3)
ENTRY_NP(__hypercall4)
ALTENTRY(__hypercall4_int)
pushl %ebx
pushl %esi
movl 12(%esp), %eax
movl 16(%esp), %ebx
movl 20(%esp), %ecx
movl 24(%esp), %edx
movl 28(%esp), %esi
TRAP_INSTR
popl %esi
popl %ebx
ret
SET_SIZE(__hypercall4)
ENTRY_NP(__hypercall5)
ALTENTRY(__hypercall5_int)
pushl %ebx
pushl %esi
pushl %edi
movl 16(%esp), %eax
movl 20(%esp), %ebx
movl 24(%esp), %ecx
movl 28(%esp), %edx
movl 32(%esp), %esi
movl 36(%esp), %edi
TRAP_INSTR
popl %edi
popl %esi
popl %ebx
ret
SET_SIZE(__hypercall5)
#endif /* __i386 */
#endif /* lint */