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hypercalls32.h
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hypercalls32.h
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/******************************************************************************
* hypercall32.h
*
* Linux-specific hypervisor handling.
*
* Copyright (c) 2009-2013, Steve Maresca/Zentific LLC
* Copyright (c) 2002-2004, K A Fraser
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License version 2
* as published by the Free Software Foundation; or, when distributed
* separately from the Linux kernel or incorporated into other
* software packages, subject to the following license:
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this source file (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use, copy, modify,
* merge, publish, distribute, sublicense, and/or sell copies of the Software,
* and to permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*/
#ifndef __HYPERCALL_32_H__
#define __HYPERCALL_32_H__
//#include <linux/string.h> /* memcpy() */
//#include <linux/stringify.h>
/*
* The following macros were copied from
* linux-2.6.18-xen/include/asm-i386/mach-xen/asm/hypercall.h.
* Normally including xen/hypercall.h should suffice, however,
* linux-2.6.26 does not seem to support 64 bit architectures for
* xen purposes.
*/
/* 32bit hypercalls */
#define HYPERCALL_STR(name) \
"mov hypercall_stubs,%%eax; " \
"add $("__stringify(__HYPERVISOR_##name)" * 32),%%eax; "\
"call *%%eax"
#define _hypercall0(type, name) \
({ \
type __res; \
asm volatile ( \
HYPERCALL_STR(name) \
: "=a" (__res) \
: \
: "memory" ); \
__res; \
})
#define _hypercall1(type, name, a1) \
({ \
type __res; \
long __ign1; \
asm volatile ( \
HYPERCALL_STR(name) \
: "=a" (__res), "=b" (__ign1) \
: "1" ((long)(a1)) \
: "memory" ); \
__res; \
})
#define _hypercall2(type, name, a1, a2) \
({ \
type __res; \
long __ign1, __ign2; \
asm volatile ( \
HYPERCALL_STR(name) \
: "=a" (__res), "=b" (__ign1), "=c" (__ign2) \
: "1" ((long)(a1)), "2" ((long)(a2)) \
: "memory" ); \
__res; \
})
#define _hypercall3(type, name, a1, a2, a3) \
({ \
type __res; \
long __ign1, __ign2, __ign3; \
asm volatile ( \
HYPERCALL_STR(name) \
: "=a" (__res), "=b" (__ign1), "=c" (__ign2), \
"=d" (__ign3) \
: "1" ((long)(a1)), "2" ((long)(a2)), \
"3" ((long)(a3)) \
: "memory" ); \
__res; \
})
#define _hypercall4(type, name, a1, a2, a3, a4) \
({ \
type __res; \
long __ign1, __ign2, __ign3, __ign4; \
asm volatile ( \
HYPERCALL_STR(name) \
: "=a" (__res), "=b" (__ign1), "=c" (__ign2), \
"=d" (__ign3), "=S" (__ign4) \
: "1" ((long)(a1)), "2" ((long)(a2)), \
"3" ((long)(a3)), "4" ((long)(a4)) \
: "memory" ); \
__res; \
})
#define _hypercall5(type, name, a1, a2, a3, a4, a5) \
({ \
type __res; \
long __ign1, __ign2, __ign3, __ign4, __ign5; \
asm volatile ( \
HYPERCALL_STR(name) \
: "=a" (__res), "=b" (__ign1), "=c" (__ign2), \
"=d" (__ign3), "=S" (__ign4), "=D" (__ign5) \
: "1" ((long)(a1)), "2" ((long)(a2)), \
"3" ((long)(a3)), "4" ((long)(a4)), \
"5" ((long)(a5)) \
: "memory" ); \
__res; \
})
#endif /* __HYPERCALL_32_H__ */