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/*********************************************************
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* Copyright (C) 2005 VMware, Inc. All rights reserved.
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* The contents of this file are subject to the terms of the Common
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* Development and Distribution License (the "License") version 1.0
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* and no later version. You may not use this file except in
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* compliance with the License.
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* You can obtain a copy of the License at
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* http://www.opensource.org/licenses/cddl1.php
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* See the License for the specific language governing permissions
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* and limitations under the License.
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*********************************************************/
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* Implements the real work for guest-side backdoor for GCC, 64-bit
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* target (supports inline ASM, GAS syntax). The asm sections are marked
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* volatile since vmware can change the registers content without the
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* compiler knowing it.
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* See backdoorGCC32.c (from which this code was mostly copied) for
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* details on why the ASM is written this way. Also note that it might be
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* possible to write the asm blocks using the symbolic operand specifiers
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* in such a way that the same asm would generate correct code for both
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* 32-bit and 64-bit targets, but I'm too lazy to figure it all out.
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#include "backdoorInt.h"
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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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* Host-side response returned in bp IN/OUT parameter.
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*----------------------------------------------------------------------------
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Backdoor_InOut(Backdoor_proto *myBp) // IN/OUT
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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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* 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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: "rbx", "rcx", "rdx", "rsi", "rdi", "memory"
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*-----------------------------------------------------------------------------
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* Send a high-bandwidth basic request to vmware, and return its
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* Host-side response returned in bp IN/OUT parameter.
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* Pokes the high-bandwidth backdoor port.
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*-----------------------------------------------------------------------------
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BackdoorHbIn(Backdoor_proto_hb *myBp) // IN/OUT
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__asm__ __volatile__(
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"movq 48(%%rax), %%rbp" "\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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"xchgq %%rax, (%%rsp)" "\n\t"
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"movq %%rbp, 48(%%rax)" "\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)" "\n\t"
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* vmware can modify the whole VM state without the compiler knowing
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: "rbx", "rcx", "rdx", "rsi", "rdi", "memory", "cc"
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BackdoorHbOut(Backdoor_proto_hb *myBp) // IN/OUT
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__asm__ __volatile__(
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"movq 48(%%rax), %%rbp" "\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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"xchgq %%rax, (%%rsp)" "\n\t"
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"movq %%rbp, 48(%%rax)" "\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)" "\n\t"
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: "rbx", "rcx", "rdx", "rsi", "rdi", "memory", "cc"
added
removed
modules/solaris/vmhgfs/backdoorGcc64.c
