148 lines
4.5 KiB
C
148 lines
4.5 KiB
C
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/*
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* Copyright 1999-2006 by VMware, Inc.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*
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* Except as contained in this notice, the name of the copyright holder(s)
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* and author(s) shall not be used in advertising or otherwise to promote
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* the sale, use or other dealings in this Software without prior written
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* authorization from the copyright holder(s) and author(s).
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*/
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/*
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* vmmouse_proto.c --
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*
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* The communication protocol between the guest and the vmmouse
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* virtual device.
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*/
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#include "vmmouse_proto.h"
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/*
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*----------------------------------------------------------------------------
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*
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* VMMouseProtoInOut --
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*
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* Send a low-bandwidth basic request (16 bytes) to vmware, and return its
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* reply (24 bytes).
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*
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* Results:
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* Host-side response returned in cmd IN/OUT parameter.
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*
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* Side effects:
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* Pokes the communication port.
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*
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*----------------------------------------------------------------------------
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*/
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static void
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VMMouseProtoInOut(VMMouseProtoCmd *cmd) // IN/OUT
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{
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#ifdef __x86_64__
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uint64_t dummy;
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__asm__ __volatile__(
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"pushq %%rax" "\n\t"
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"movq 40(%%rax), %%rdi" "\n\t"
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"movq 32(%%rax), %%rsi" "\n\t"
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"movq 24(%%rax), %%rdx" "\n\t"
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"movq 16(%%rax), %%rcx" "\n\t"
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"movq 8(%%rax), %%rbx" "\n\t"
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"movq (%%rax), %%rax" "\n\t"
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"inl %%dx, %%eax" "\n\t" /* NB: There is no inq instruction */
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"xchgq %%rax, (%%rsp)" "\n\t"
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"movq %%rdi, 40(%%rax)" "\n\t"
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"movq %%rsi, 32(%%rax)" "\n\t"
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"movq %%rdx, 24(%%rax)" "\n\t"
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"movq %%rcx, 16(%%rax)" "\n\t"
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"movq %%rbx, 8(%%rax)" "\n\t"
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"popq (%%rax)"
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: "=a" (dummy)
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: "0" (cmd)
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/*
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* vmware can modify the whole VM state without the compiler knowing
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* it. So far it does not modify EFLAGS. --hpreg
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*/
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: "rbx", "rcx", "rdx", "rsi", "rdi", "memory"
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);
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#else
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#ifdef __i386__
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uint32_t dummy;
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__asm__ __volatile__(
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"pushl %%ebx" "\n\t"
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"pushl %%eax" "\n\t"
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"movl 20(%%eax), %%edi" "\n\t"
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"movl 16(%%eax), %%esi" "\n\t"
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"movl 12(%%eax), %%edx" "\n\t"
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"movl 8(%%eax), %%ecx" "\n\t"
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"movl 4(%%eax), %%ebx" "\n\t"
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"movl (%%eax), %%eax" "\n\t"
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"inl %%dx, %%eax" "\n\t"
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"xchgl %%eax, (%%esp)" "\n\t"
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"movl %%edi, 20(%%eax)" "\n\t"
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"movl %%esi, 16(%%eax)" "\n\t"
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"movl %%edx, 12(%%eax)" "\n\t"
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"movl %%ecx, 8(%%eax)" "\n\t"
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"movl %%ebx, 4(%%eax)" "\n\t"
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"popl (%%eax)" "\n\t"
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"popl %%ebx"
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: "=a" (dummy)
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: "0" (cmd)
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/*
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* vmware can modify the whole VM state without the compiler knowing
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* it. So far it does not modify EFLAGS. --hpreg
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*/
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: "ecx", "edx", "esi", "edi", "memory"
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);
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#else
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#error "VMMouse is only supported on x86 and x86-64."
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#endif
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#endif
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}
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/*
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*-----------------------------------------------------------------------------
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*
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* VMMouseProto_SendCmd --
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*
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* Send a request (16 bytes) to vmware, and synchronously return its
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* reply (24 bytes).
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*
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* Result:
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* None
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*
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* Side-effects:
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* None
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*
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*-----------------------------------------------------------------------------
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*/
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void
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VMMouseProto_SendCmd(VMMouseProtoCmd *cmd) // IN/OUT
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{
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cmd->in.magic = VMMOUSE_PROTO_MAGIC;
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cmd->in.port = VMMOUSE_PROTO_PORT;
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VMMouseProtoInOut(cmd);
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}
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