diff options
Diffstat (limited to 'shared/vmmouse_proto.c')
| -rw-r--r-- | shared/vmmouse_proto.c | 147 |
1 files changed, 147 insertions, 0 deletions
diff --git a/shared/vmmouse_proto.c b/shared/vmmouse_proto.c new file mode 100644 index 0000000..b50e071 --- /dev/null +++ b/shared/vmmouse_proto.c @@ -0,0 +1,147 @@ +/* + * Copyright 1999-2006 by VMware, Inc. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (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 COPYRIGHT HOLDER(S) OR AUTHOR(S) 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. + * + * Except as contained in this notice, the name of the copyright holder(s) + * and author(s) shall not be used in advertising or otherwise to promote + * the sale, use or other dealings in this Software without prior written + * authorization from the copyright holder(s) and author(s). + */ + +/* + * vmmouse_proto.c -- + * + * The communication protocol between the guest and the vmmouse + * virtual device. + */ + + +#include "vmmouse_proto.h" + + +/* + *---------------------------------------------------------------------------- + * + * VMMouseProtoInOut -- + * + * Send a low-bandwidth basic request (16 bytes) to vmware, and return its + * reply (24 bytes). + * + * Results: + * Host-side response returned in cmd IN/OUT parameter. + * + * Side effects: + * Pokes the communication port. + * + *---------------------------------------------------------------------------- + */ + +static void +VMMouseProtoInOut(VMMouseProtoCmd *cmd) // IN/OUT +{ +#ifdef __x86_64__ + uint64_t dummy; + + __asm__ __volatile__( + "pushq %%rax" "\n\t" + "movq 40(%%rax), %%rdi" "\n\t" + "movq 32(%%rax), %%rsi" "\n\t" + "movq 24(%%rax), %%rdx" "\n\t" + "movq 16(%%rax), %%rcx" "\n\t" + "movq 8(%%rax), %%rbx" "\n\t" + "movq (%%rax), %%rax" "\n\t" + "inl %%dx, %%eax" "\n\t" /* NB: There is no inq instruction */ + "xchgq %%rax, (%%rsp)" "\n\t" + "movq %%rdi, 40(%%rax)" "\n\t" + "movq %%rsi, 32(%%rax)" "\n\t" + "movq %%rdx, 24(%%rax)" "\n\t" + "movq %%rcx, 16(%%rax)" "\n\t" + "movq %%rbx, 8(%%rax)" "\n\t" + "popq (%%rax)" + : "=a" (dummy) + : "0" (cmd) + /* + * vmware can modify the whole VM state without the compiler knowing + * it. So far it does not modify EFLAGS. --hpreg + */ + : "rbx", "rcx", "rdx", "rsi", "rdi", "memory" + ); +#else +#ifdef __i386__ + uint32_t dummy; + + __asm__ __volatile__( + "pushl %%ebx" "\n\t" + "pushl %%eax" "\n\t" + "movl 20(%%eax), %%edi" "\n\t" + "movl 16(%%eax), %%esi" "\n\t" + "movl 12(%%eax), %%edx" "\n\t" + "movl 8(%%eax), %%ecx" "\n\t" + "movl 4(%%eax), %%ebx" "\n\t" + "movl (%%eax), %%eax" "\n\t" + "inl %%dx, %%eax" "\n\t" + "xchgl %%eax, (%%esp)" "\n\t" + "movl %%edi, 20(%%eax)" "\n\t" + "movl %%esi, 16(%%eax)" "\n\t" + "movl %%edx, 12(%%eax)" "\n\t" + "movl %%ecx, 8(%%eax)" "\n\t" + "movl %%ebx, 4(%%eax)" "\n\t" + "popl (%%eax)" "\n\t" + "popl %%ebx" + : "=a" (dummy) + : "0" (cmd) + /* + * vmware can modify the whole VM state without the compiler knowing + * it. So far it does not modify EFLAGS. --hpreg + */ + : "ecx", "edx", "esi", "edi", "memory" + ); +#else +#error "VMMouse is only supported on x86 and x86-64." +#endif +#endif +} + + +/* + *----------------------------------------------------------------------------- + * + * VMMouseProto_SendCmd -- + * + * Send a request (16 bytes) to vmware, and synchronously return its + * reply (24 bytes). + * + * Result: + * None + * + * Side-effects: + * None + * + *----------------------------------------------------------------------------- + */ + +void +VMMouseProto_SendCmd(VMMouseProtoCmd *cmd) // IN/OUT +{ + cmd->in.magic = VMMOUSE_PROTO_MAGIC; + cmd->in.port = VMMOUSE_PROTO_PORT; + + VMMouseProtoInOut(cmd); +} |